SP239CS [SIPEX]
Line Driver/Receiver,;
| 型号： | SP239CS |
| 厂家： | 
SIPEX CORPORATION |
| 描述： | Line Driver/Receiver, 线路驱动器或接收器 驱动程序和接口 接口集成电路 光电二极管 |
| 文件： | 总17页 (文件大小：399K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
SP230A/234A/235A/236A/237A/238A/241A
SP235B/236B/240A/240B/241A/241B
+5V Powered Multi-Channel RS-232 Drivers/Receivers
■ Operates from Single +5V Power Supply
■ Meets All RS-232D and V.28 Specifications
■ ±9V Output Swing with +5V Supply
T
T
T
OUT
OUT
IN
1
2
3
4
5
6
7
8
16
15
14
13
T
OUT
OUT
IN
1
2
3
T
T
4
4
2
T
IN
T
IN
1
3
■ Improved Driver Output Capacity for
GND
12 V-
Mouse Applications
V
11
10
9
C
C
C
-
2
2
CC
■ Low Power Shutdown – 1µA
C
+
+
-
1
■ WakeUp Feature in Shutdown Mode
■ 3–State TTL/CMOS Receiver Outputs
■ ±30V Receiver Input Levels
V+
1
Now Available in Lead Free Packaging
■ Low Power CMOS – 5mA Operation
■ Wide Charge Pump Capacitor Value
Range – 1-10µF
DESCRIPTION…
The SP230A Series are multi–channel RS-232 line drivers/receivers that provide a variety of
configurationstofitmostcommunicationneeds, especiallywhere±12Visnotavailable. Somemodels
feature a shutdown mode to conserve power in battery-powered systems. Some require no external
components. All, except one model, feature a built-in charge pump voltage converter, allowing them
tooperatefromasingle+5Vpowersupply. AlldriversandreceiversmeetallEIARS-232DandCCITT
V.28 requirements. The Series is available in plastic DIP and SOIC packages.
SELECTION TABLE
No. of
No. of
Power
Supplies
+5V
RS-232 RS-232
Drivers Rcvrs
External
Low Power TTL Wake- No. of
Model
Components Shutdown 3–State Up
Pins
20
16
24
24
24
24
24
24
44
44
28
28
SP230A
SP234A
SP235A
SP235B
SP236A
SP236B
SP237A
SP238A
SP240A
SP240B
SP241A
SP241B
5
4
5
5
4
4
5
4
5
5
4
4
0
0
5
5
3
3
3
4
5
5
5
5
4 Capacitors
4 Capacitors
None
Yes
No
No
No
No
No
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
No
No
None
Yes
No
4 Capacitors
4 Capacitors
4 Capacitors
4 Capacitors
4 Capacitors
4 Capacitors
4 Capacitors
4 Capacitors
Yes
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
No
Yes
Date: 8/3/04
+ 5V Powered Multi-Channel RS-232 Drivers/Receivers
© Copyright 2004 Sipex Corporation
1
Output Voltages:
ABSOLUTE MAXIMUM RATINGS
TOUT ................................................................................................. (V+, +0.3V) to (V–, –0.3V)
ROUT .............................................................................................................. –0.3V to (Vcc +0.3V)
Short Circuit Duration:
TOUT ......................................................................................................................................... Continuous
Power Dissipation:
This is a stress rating only and functional operation of the device at
these or any other conditions above those indicated in the operation
sections of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods of time may affect
reliability.
CERDIP .............................................................................. 675mW
(derate 9.5mW/°C above +70°C)
Plastic DIP .......................................................................... 375mW
(derate 7mW/°C above +70°C)
Small Outline ...................................................................... 375mW
(derate 7mW/°C above +70°C)
VCC ............................................................................................................................................................... +6V
V+ ................................................................................................................... (Vcc–0.3V) to +13.2V
V– ............................................................................................................................................................. 13.2V
Input Voltages:
TIN ....................................................................................................................... –0.3 to (Vcc +0.3V)
RIN ............................................................................................................................................................ ±30V
ELECTRICAL CHARACTERISTICS
All units Vcc=+5V±10%; except SP235A/B, Vcc=+5V±5%; All specifications TMIN to TMAX unless otherwise noted.
PARAMETERS
MIN.
TYP.
MAX.
UNITS
CONDITIONS
POWER REQUIREMENTS
Vcc Power Supply Current
5
1
10
10
mA
No load, TA= +25°C
TA = +25°C
Shutdown Supply Current
µA
LOGIC INPUTS
Input Logic Threshold
Low
0.8
Volts
Volts
µA
TIN ; EN, SD
TIN ; EN, SD
TIN = 0V
High
2.0
Logic Pullup Current
15
200
RS-232 INPUTS
RS-232 Input Voltage Range
RS-232 Input Threshold
Low
-30
0.8
+30
Volts
1.2
1.7
0.5
5
Volts
Volts
Volts
Vcc = 5V, T = +25°C
Vcc = 5V, TAA = +25°C
Vcc = 5V
High
2.4
1.0
7
RS-232 Input Hysteresis
RS-232 Input Resistance
0.2
3
kOhms
TA = +25°C, -15V ≤ VIN ≤ +15V
LOGIC OUTPUTS
Output Voltage
Low
0.4
Volts
Volts
µA
IOUT = 3.2mA
IOUT = 1.0mA
EN = VCC, 0V≤VOUT ≤Vcc
High
3.5
Output Leakage Current
0.05
±10
RS-232 OUTPUTS
Output Enable Time
400
250
1.5
ns
ns
SP235A/B, SP236A/B,
SP241A/B
SP235A/B, SP236A/B,
SP241A/B
Output Disable Time
Propagation Delay
µs
RS232 to TTL
Instantaneous Slew Rate
30
V/µs
CL = 10pF, RL= 3–7kΩ;
TA = +25°C
RS-232 OUTPUTS
Transition Region Slew Rate
3
V/µs
CL = 2500pF, RL= 3kΩ;
measured from +3V to -3V or
-3V to +3V
Output Voltage Swing
±5
±9
Volts
All transmitter outputs loaded
with 3kΩ to Ground
Output Resistance
RS-232 Output Short Circuit Current
300
Ohms
mA
VCC= 0V; VOUT = ±2V
Infinite duration
±10
Date: 8/3/04
+ 5V Powered Multi-Channel RS-232 Drivers/Receivers
© Copyright 2004 Sipex Corporation
2
Transmitter Output Waveforms
5V
5V
IN 0V
T
T
IN 0V
0V
TOUT
0V
TOUT
RL = 3kΩ, CL = 2,500pF
No load
Transmitter Propagation Delay
TIN
TIN
TOUT
TOUT
Rise Time
LAll inputsL= 20kHz
Fall Time
RL = 3kΩ; CL = 2,500pF
R = 3kΩ; C = 2,500pF
Receiver Output Waveform
Shutdown to V+, V– Rise Time
5V
0V
SD
In
V+
0V
V–
Out
Date: 8/3/04
+ 5V Powered Multi-Channel RS-232 Drivers/Receivers
© Copyright 2004 Sipex Corporation
3
Receiver Propagation Delay
5V
R
RIN
IN 0V
5V
5V
R
R
OUT 0V
OUT 0V
Fall Time
Rise Time
PINOUT
T
T
OUT
OUT
OUT
IN
1
2
20
19
T
OUT
IN
T
T
T
OUT
OUT
IN
1
2
3
4
5
6
7
8
16
15
14
13
T
3
OUT
OUT
IN
T
OUT
OUT
OUT
OUT
IN
1
2
24
23
22
R
R
T
IN
4
3
4
1
2
3
3
T
T
T
T
T
T
OUT
IN
1
5
4
4
3
T
2
3
18 NC
17 SD
3
2
1
5
T
4
T
IN
IN
T
4
21 SD
20 EN
2
1
1
3
2
T
IN
5
16
15
14
T
OUT
IN
GND
12 V-
R
5
5
2
GND
6
T
T
V
11
10
9
C
C
C
-
R
T
OUT
2
6
19
18
17
16
15
14
13
T
5
OUT
IN
2
4
3
CC
V
7
IN
C
+
+
-
IN
7
R
R
T
2
1
1
2
CC
4
C
+
8
13 V-
V+
T
IN
8
OUT
IN
1
1
4
V+
9
12
11
C
C
-
R
R
OUT
9
2
1
4
C
1
-
10
+
2
IN
10
11
12
T
3
IN
1
GND
R
R
OUT
5
5
V
IN
CC
T
OUT
OUT
OUT
IN
1
2
24
23
22
T
OUT
IN
3
4
T
OUT
1
2
24
R
R
T
IN
T
OUT
OUT
OUT
IN
1
24
T
OUT
IN
4
3
4
3
3
T
1
R
R
2
2
T
T
OUT
OUT
OUT
IN
23
22
OUT
IN
T
1
2
3
23
22
R
3
2
2
T
3
OUT
2
3
T
R
OUT
5
1
2
R
4
21 SD
20 EN
1
T
4
21 SD
20 EN
R
4
21 SD
20 EN
2
1
R
OUT
IN
5
1
R
5
R
OUT
IN
5
1
2
T
T
6
19
18
17
16
T
IN
2
4
R
OUT
6
19
18
17
16
15
14
13
T
5
OUT
IN
T
T
6
19
18
17
16
T
IN
2
2
4
IN
7
T
IN
1
3
T
IN
7
R
R
T
IN
1
7
T
IN
2
4
3
GND
8
R
R
OUT
3
T
IN
8
OUT
IN
GND
8
R
R
OUT
1
4
3
V
9
IN
CC
3
R
OUT
9
V
9
IN
1
4
CC
3
C
+
-
10
11
12
15 V-
1
R
IN
10
11
12
T
3
IN
C
+
-
10
11
12
15 V-
1
1
V+
14
13
C
C
-
2
2
GND
R
R
OUT
V+
14
13
C
C
-
5
5
2
2
C
+
1
V
IN
C
1
+
CC
Date: 8/3/04
+ 5V Powered Multi-Channel RS-232 Drivers/Receivers
© Copyright 2004 Sipex Corporation
4
Receiver Output Enable/Disable Times
5V
5V
EN IN
EN IN
0V
0V
5V
5V
ROUT
ROUT
0V
0V
Disable
Enable
PINOUT
T
T
OUT
OUT
OUT
IN
1
2
T
T
OUT
OUT
IN
1
2
24
23
22
21
20
19
18
17
16
T
OUT
IN
24
23
22
21
20
19
18
17
16
T
OUT
IN
3
2
4
3
R
R
T
R
R
1
1
2
2
3
3
T
3
R
3
OUT
IN
OUT
IN
2
2
R
4
R
T
OUT
2
4
T
4
1
5
R
OUT
IN
5
IN
5
T
OUT
IN
T
OUT
IN
1
1
5
4
T
6
R
R
OUT
1
6
T
T
3
2
4
T
IN
7
IN
1
7
T
IN
T
IN
1
3
2
GND
8
GND
8
R
R
OUT
R
R
OUT
3
3
4
4
V
9
V
9
IN
IN
CC
CC
C
+
-
10
11
12
C
+
10
11
12
15 V-
15 V-
1
1
V+
V+
14
13
C
C
-
14
13
C
C
-
2
2
2
2
C
1
C
1
-
+
+
T
T
T
OUT
1
28
T OUT
4
T
T
T
OUT
OUT
OUT
IN
1
2
3
4
5
6
7
8
9
28
27
26
T
OUT
IN
3
4
3
1
OUT
OUT
IN
2
3
27
26
R
R
IN
R
R
1
3
3
3
OUT
OUT
3
2
2
R
4
25 SHUTDOWN (SD)
24 EN
R
25 SHUTDOWN (SD)
24 EN
2
2
R
T
OUT
2
5
R
T
OUT
N.C.
N.C.
N.C.
V–
N.C.
T5IN
1
2
33
32
31
30
29
28
27
26
25
24
23
2
IN
6
23
22
21
20
19
18
R
R
T
IN
IN
23
22
21
20
19
18
R
R
T
IN
2
4
4
2
4
4
R
3OUT
3
R3IN
T
IN
7
OUT
4
T
IN
OUT
1
1
C2–
C2+
C1–
T
T
T
T
4OUT
3OUT
1OUT
2OUT
N.C.
5
R
R
OUT
8
IN
R
R
OUT
IN
1
4
1
4
6
SP240A/B
7
IN
9
T
IN
IN
1
T
IN
1
3
3
V+
8
GND
10
11
12
13
14
R
R
OUT
GND
10
11
12
13
14
R
R
OUT
5
C1+
9
5
N.C.
N.C.
R2IN
10
11
V
IN
V
IN
5
5
CC
CC
N.C.
C
+
-
17 V-
C
+
-
17 V-
1
1
V+
16
15
C
C
-
V+
16
15
C
C
-
2
2
2
2
C
1
+
C
1
+
Date: 8/3/04
+ 5V Powered Multi-Channel RS-232 Drivers/Receivers
© Copyright 2004 Sipex Corporation
5
FEATURES…
THEORY OF OPERATION
Themulti–channelRS-232linedrivers/receiverspro-
videsavarietyofconfigurationstofitmostcommuni-
cation needs, especially those applications where
±12V is not available. The SP230A, SP235A/B,
SP236A/B, SP240A/B, and SP241A/B feature a
shutdownmodewhichreducesdevicepowerdissipa-
tion to less than 5µW. All feature low power CMOS
operation, which is particularly beneficial in battery-
powered systems. The SP235A/B use no external
components and are ideally suited where printed
circuit board space is limited.
The SP230A/B–241A/B series devices are made up
ofthreebasiccircuitblocks–1)transmitter,2)receiver
and 3) charge pump. Each model within the series
incorporatesvariationsofthesecircuitstoachievethe
desired configuration and performance.
Driver/Transmitter
The drivers are inverting transmitters, which accept
TTL or CMOS inputs and output the RS-232 signals
withaninvertedsenserelativetotheinputlogiclevels.
Typically the RS-232 output voltage swing is ±9V.
Evenunderworst-caseloadingconditionsof3kΩand
2500pF, the output is guaranteed to be ±5V, which is
consistent with the RS-232 standard specifications.
The transmitter outputs are protected against infi-
nite short-circuits to ground without degradation
in reliability.
All products in the Series include two charge pump
voltage converters which allow them to operate from
a single +5V supply. These converters convert the
+5V input power to the ±10V needed to generate
theRS-232outputlevels.Aninternalchargepump
converter produces the necessary –12V supply.
All drivers and receivers meet all EIA RS-232D
and CCITT V.28 specifications.
The drivers of the SP230A, SP235A/B, SP236A/B,
SP240A/B and SP241A/B can be tri-stated by using
theSHUTDOWNfunction.Inthis“power-off”state,
the output impedance will remain greater than 300
Ohms, again satisfying the RS-232 specifications.
Should the input of the driver be left open, an internal
400kΩ pull–up resistor to VCC forces the input high,
thus committing the output to a low state.
The Series are available for use over the commer-
cial, industrial and military temperature ranges.
They are packaged in plastic DIP and SOIC
packages. For product processed and screened to
MIL–M–38510 and MIL–STD–883C require-
ments, please consult the factory.
The slew rate of the transmitter output is internally
limited to a maximum of 30V/µs in order to meet the
20kbps
100kbps
10Mbps
10Mbps
64kbps
Table 1. EIA Standards Definition
Date: 8/3/04
+ 5V Powered Multi-Channel RS-232 Drivers/Receivers
© Copyright 2004 Sipex Corporation
6
standards [EIA RS-232–D 2.1.7, Paragraph (5)]. The
transitionoftheloadedoutputfromVOL toVOH clearly
meets the monotonicity requirements of the standard
S1
S2
S3
S4
V
V+ = 2V
CC
CC
+
+
[EIA RS-232–D 2.1.7, Paragraphs (1) & (2)]
.
C1
C3
V
CC
GND
Receivers
The receivers convert RS-232 input signals to in-
verted TTL signals. Since the input is usually from a
transmission line, where long cable lengths and sys-
tem interference can degrade the signal, the inputs
have a typical hysteresis margin of 500mV. This
ensures that the receiver is virtually immune to
noisy transmission lines.
INTERNAL
OSCILLATOR
Figure 1. Charge Pump Voltage Doubler
supply by generating the required operating voltages
internal to the devices. The charge pump consists of
two sections — 1) a voltage doubler and 2) a voltage
inverter.
The input thresholds are 0.8V minimum and 2.4V
maximum, again well within the ±3V RS-232 re-
quirements. The receiver inputs are also protected
against voltages up to ±30V. Should an input be left
unconnected, a 5kΩpulldown resistor to ground will
commit the output of the receiver to a high state.
As shown in Figure 1, an internal oscillator
triggers the charge accumulation and voltage
inversion. The voltage doubler momentarily
In actual system applications, it is quite possible for
signals to be applied to the receiver inputs before
powerisappliedtothereceivercircuitry. Thisoccurs,
forexample, whenaPCuserattemptstoprint, onlyto
realize the printer wasn’t turned on. In this case an
RS-232signalfromthePCwillappearonthereceiver
input at the printer. When the printer power is turned
on, the receiver will operate normally. All series
devices are fully protected. Again, to facilitate use in
“real-world”applications, thereceiveroutputscanbe
tri–stated by bringing the ENABLE (EN) pin high,
with the driver remaining full active.
stores a charge on capacitor C1 equal to VCC
,
reference to ground. During the next transition
of the oscillator this charge is boot–strapped to
transfer charge to capacitor C3. The voltage
across C3 is now from VCC to V+.
In the inverter section (Figure 2), the voltage
across C3 is transferred to C2 forcing a range of
0V to V+ across C2. Boot–strapping of C2 will
then transfer charge to C4 to generate V-.
The values of the capacitors are somewhat
non-critical and can be varied, however the
performance will be affected. As C3 and C4 are
reduced, higher levels of ripple will appear.
Lower values of C1 and C2 will increase the
Charge Pump
ThechargepumpsectionoftheSP230Aseriesallows
thecircuittooperatefromasingle+5V, ±10%power
10.5
10.0
9.5
10.5
10.0
9.5
9.0
9.0
8.5
8.5
8.0
V
CC =5.5V
8.0
7.5
7.0
6.5
6.0
5.5
5.0
VCC =5.5V
7.5
7.0
6.5
6.0
5.5
5.0
VCC =5V
V
CC=4.5V
VCC =5V
VCC=4.5V
0
5
10
15
20
25
30
35
40
0
5
10
15
20
25
30
35
40
b)
V- I OUT (m A)
a)
Charge Pump Output Loading versus VCC; a) V+; b) V–
V+ IOUT (m A)
Date: 8/3/04
+ 5V Powered Multi-Channel RS-232 Drivers/Receivers
© Copyright 2004 Sipex Corporation
7
ENABLE Input (EN)
Power
Up/Down
Receiver
Outputs
The SP235A/B, SP236A/B, SP240A/B, and
SP241A/B all feature an enable input (EN),
which allows the receiver outputs to be either
tri–stated or enabled. The enable input is active
low; 0V applied to EN will enable the receiver
outputs. This can be especially useful when the
receiver is tied directly to a microprocessor data
bus.
SD
0
EN
0
Up
Up
Enable
Tri–state
Enable
0
1
1
0
Down
Down
1
1
Tri–state
Table 2. Wake–Up Truth Table
Protection From Shorts to >±15V
output impedance of V+ and V-, which will
degrade VOH and VOL. Capacitor values can be
as low as 1.0µF.
The driver outputs are protected against shorts
to ground, other driver outputs, and V+ or V-.
Forprotectionagainstvoltagesexceeding±15V,
two back–to–back zener diodes connected to
clamp the outputs to an acceptable voltage level
are recommended. (Refer to Figure 3.)
Shutdown (SD)
TheSP230A, SP235A/B, SP236A/B, SP240A/
B and SP241A/B all feature a control input
which will disable the part and reduce VCC
current typically to less than 5µA, which is
especially useful to designers of battery–pow-
ered systems. In the “power–off” mode the
receiver and transmitter will both be tri-stated.
V+ will discharge to VCC, and V- will discharge
to ground.
Improved Drive Capability for Mouse
Applications
Each of the devices in this data sheet have
improved drive capability for non-standard ap-
plications. Although the EIA RS-232D stan-
dards specify the maximum loading to be 3kΩ
and 2500pF, the SP230A, SP234A, SP235A/B,
SP236A/B, SP237A, SP238A, SP240A/B, and
SP241A/B can typically drive loads as low as
1kΩandstillmaintain±5Voutputs.Thisfeature
is especially useful when the serial port is in-
tended to be used for a “self-powered” mouse.
In this case the voltage necessary to operate the
circuits in the mouse can be derived from the
RS-232 driver output as long as the loading is
≥1kΩ(refertoFigure4).Forapplicationswhich
even exceed this requirement, drivers can be
connected in parallel, increasing the drive capa-
bility to 750Ω, while maintaining the ±5V VOH
and VOL levels (refer to Figure 5).
For complete shutdown to occur and the 10µA
current drain to be realized, the following con-
ditions must be met:
• +5.00V must be applied to the SD pin;
• ENABLE must either 0V, +5.0V or not connected;
• the transmitter inputs must be either +5.0V or not
connected;
• VCC must be +5V;
• Receiver inputs must be >0V and <+5V
Please note that for proper operation, the SD
input pin must never be left floating.
T
IN
IN
T OUT
1
S1
S2
S3
S4
1
V+
FROM
GND
+
+
15V ZENER
C2
C4
VOLTAGE DOUBLER
GND
V- = -(V+)
T
T OUT
2
2
INTERNAL
OSCILLATOR
15V ZENER
Figure 2. Charge Pump Voltage Inverter
Figure 3. High Voltage Short Circuit Protection
Date: 8/3/04
+ 5V Powered Multi-Channel RS-232 Drivers/Receivers
© Copyright 2004 Sipex Corporation
8
10
9
8
7
6
5
4
3
2
1
0
T
IN
T OUT
V
vs I
OH
OH
V
vs I
OL
OL
0
2
4
6
8
10
12
14
16
18
20
22
I
/I (mA)
OL OH
Figure 4. Mouse Application Drive Capability
Figure 5. Parallel Drivers
If the SP235B, SP236B, SP240B and SP241B
arepoweredupintheshutdownstate(SDdriven
highduringVCC powerup),thepartmustremain
in a powered on state for a minimum of 3ms
before the wake-up function can be used. After
the 3ms wait time, there is a 2ms delay time
before data is valid for both enable and disable
Wake-Up Feature
The SP235B, SP236B, SP240B and SP241B
have a wake-up feature that keeps all receivers
in an enabled state when the device is in the
shutdown mode. Table 2 defines the truth table
forthewake-upfunction.Timingforthewake-up
function is shown in Figure 6.
POWER-UP WITH SD HIGH (charge pump section in shutdown state)
(power up)
t
0
+5V
DATA
VALID
R
OUT
0V
+5V
0V
t
WAIT
SD
POWER-UP WITH SD LOW (charge pump section in active mode)
(power up)
t
0
+5V
DATA
VALID
R
OUT
0V
+5V
0V
t
ENABLE
SD
EXERCISING WAKE–UP FEATURE
(power up)
t
0
+5V
DATA
VALID
DATA
VALID
DATA
VALID
R
OUT
0V
+5V
0V
t
t
t
ENABLE
ENABLE
ENABLE
t
WAIT
SD
SPECIFICATIONS:
(V =+5V±10%, T =25°C)
CC
A
PARAMETER MIN. TYP.
MAX.
3ms
2ms
t
t
2ms
1ms
WAIT
ENABLE
Figure 6. Wake–Up and Shutdown Timing
Date: 8/3/04
+ 5V Powered Multi-Channel RS-232 Drivers/Receivers
© Copyright 2004 Sipex Corporation
9
of the charge pump. If the SP2XXB is powered
up with SD low, then only the 2ms delay time
will apply (refer to Figure 6). Under normal
operation, both the wait time and delay time
should be transparent to the user.
at these minimum values, the supply voltage must
be maintained at +5.0V ±5%. Also, the ambient
operating temperature must be less than 60°C.
The capacitor values must be chosen to suit the
particular application. The designer must bal-
anceboardspace,costandperformancetomaxi-
mizethedesign. Thecapacitorscanbepolarized
ornon–polarized,axial-leadedorsurface-mount.
As the size and value decrease, so does the cost;
however, the value should be chosen to accom-
modate worst-case load conditions.
With only the receivers activated, the device
typically draws less than 5µA (10µA max) sup-
ply current. In the case of a modem interfaced to
a computer in power-down mode, the RI (ring
indicator)signalfromthemodemwouldbeused
to “wake up” the computer, allowing it to accept
the data transmission.
INTERFACE EXAMPLE – A MODEM
ON THE IBM PC SERIAL PORT
After the ring indicator signal has propagated
through the SP2XXB receiver, it can be used to
trigger the power management circuitry of the
computer to power up the microprocessor and
bring the SD pin to the SP2XXB low, taking it
out of shutdown. The receiver propagation de-
lay is typically 1µs. The enable time for V+ and
V- is typically 2ms. After V+ and V- have
settled to their final values, a signal can be sent
back to the modem on the DTR (Data Terminal
Ready) pin signifying that the computer is ready
to accept and transmit data.
The RS-232 standard defines 22 serial interface
signals. These signals consist of ground lines,
timing, data, control and test signals, plus a set
of signals rarely used for a second data channel.
Many of these signal lines are not used in typical
RS-232applications;infact,theIBM® PCserial
port is implemented using only nine pins.
Forexample,considerthecaseofaPCusingthis
nine pin port to communicate with a peripheral
device such as a modem. We see the following
activity on each of the RS-232 lines as the
computerandmodemareactivatedandcommu-
nicate with each other as well as the remote
modem at the other end of the phone line.
All receivers that are active during shutdown
maintain 500mV (typ.) of hysteresis.
Varying Capacitor Values
As stated earlier, the capacitor values are some-
what non-critical. Since they are an actual compo-
nent of the charge pump circuitry, their value will
affect its performance, which in turn affects the
VOH andVOL levels. Thereisnoupperlimitforthe
value of any of the four capacitors; lower values
will impact performance. C1 and C2 are respon-
sible for the charge accumulation and can be
reduced to 1µF; this will increase the output im-
pedance of V+ and V–. Reducing these capacitor
values will limit the ability of the SP2XXA/B to
maintain the dc voltages needed to generate the
RS-232 output levels. Capacitors C3 and C4 can
also be reduced to 1µF; doing so will increase the
ripple on V+ and V–.
Signal Ground (GND)
The Signal Ground pin acts as a reference for all
the other signals. This pin is simply maintained
at a 0V level to serve as a level to which all other
signals are referenced. Both the PC and the
modem will have this line connected to their
respective internal ground lines.
22
Ring Indicator
Ring Indicator
R
D
20
D
R
Data Terminal Ready
Data Terminal Ready
Data Carrier Detect
8
7
6
Data Carrier Detect
R
D
Signal Ground
Data Set Ready
Signal Ground
Data Set Ready
R
R
D
D
5
4
3
Clear To Send
Ready To Send
Received Data
Clear To Send
Ready To Send
Received Data
D
D
R
R
R
D
2
Transmitted Data
(To Be Printed)
Received Data
(To Be Printed)
SP239A
SP237A
Typically each driver will require 1µF of capaci-
tance as a minimum to operate within all specified
parameters; if five drivers are active in the circuit,
then C3 and C4 should be 5µF. In order to operate
Modem
Computer
IBM Modem Port Interconnections
Date: 8/3/04
+ 5V Powered Multi-Channel RS-232 Drivers/Receivers
© Copyright 2004 Sipex Corporation
10
Data Terminal Ready (DTR)
This is the pin the computer uses to tell periph-
eral devices that it is on–line and ready to
communicate.
path with the remote modem, and to expect to
start receiving data at any time.
Received Data (RD or RX)
This is the pin on which the modem sends the
computer the incoming data signal, i.e. a posi-
tive voltage (+3V to +15V) to represent a logic
“0”, and a negative voltage (-3V to -15V) to
represent a logic “1”.
Data Set Ready (DSR)
Peripheral devices use this line to tell the com-
puter that they are on–line and ready to commu-
nicate. When the modem is turned on and has
completeditsself–testroutine(assumingitdoes
one), it will send a signal to the PC by asserting
this line.
INTERFACE EXAMPLE – A PRINTER
ON THE IBM PC SERIAL PORT
The RS-232 standard defines 22 serial interface
signals. These signals consist of ground lines,
timing, data, control and test signals, plus a set of
signals rarely used for a second data channel.
Many of these signal lines are not used in typical
RS-232 applications; in fact, the IBM® PC serial
port is implemented using only nine pins.
Request To Send (RTS)
The computer activates this line to notify the
peripheral device that it is ready to send data. In
this example, the computer notifies the modem
that it is ready to send data to be transmitted by
the modem.
Clear To Send (CTS)
For example, consider the case of a PC using this
nine pin port to communicate with a peripheral
device such as a printer. We see the following
activity on each of the RS-232 lines as the com-
puter and printer are activated and communicate.
This is the line on which the peripheral device
tells the computer that it is ready to receive data
fromthecomputer. Ifthemodemwasnotready,
i.e. it was performing a loop–back self–test, for
example, it would not assert this line. Once the
modem was ready to receive data from the PC,
it would assert this line. When it receives the
CTS signal from the modem, the PC knows that
a data transmission path has been established
between itself and the modem.
Signal Ground (GND)
TheSignalGroundpinactsasareferenceforallthe
othersignals.Thispinissimplymaintainedata0V
level to serve as a level to which all other signals
are referenced. Both the PC and the printer will
havethislineconnectedtotheirrespectiveinternal
ground lines.
Transmitted Data (TD or TX)
This is the pin on which the computer sends the
actual data signal to be transmitted, i.e. a posi-
tive voltage (+3V to +15V) to represent a logic
“0”, and a negative voltage (–3V to –15V) to
represent a logic “1”. The PC would send the
dataonthislinetobetransmittedbythemodem.
Data Terminal Ready (DTR)
This is the pin the computer uses to tell peripheral
devices that it is on–line and ready to communi-
7
Signal Ground
Data Set Ready
Signal Ground
Data Set Ready
Ring Indicator (RI)
6
R
R
D
D
This line is used by the peripheral device to tell
the computer that a remote device wants to start
communicating. Themodemwouldactivatethe
RI line to tell the computer that the remote
modem was calling, i.e. the phone is ringing.
5
4
2
Clear To Send
Ready To Send
Clear To Send
Ready To Send
D
D
R
R
Received Data
(To Be Printed)
Transmitted Data
(To Be Printed)
SP231A/232A
SP231A/232A
Data Carrier Detect (DCD)
This line is used by the modem to tell the
computer that it has completed a transmission
Printer
Computer
IBM Printer Port Interconnections
Date: 8/3/04
+ 5V Powered Multi-Channel RS-232 Drivers/Receivers
© Copyright 2004 Sipex Corporation
11
cate.Oncethecomputerispowered–upandready,
it will send out a signal on the DTR to inform the
printer that it is powered–up and ready to go. The
printerreallydoesn’tcare,sinceitwillsimplyprint
data as it is received. Accordingly, this pin is not
needed at the printer.
Received Data (RD or RX)
This is the pin on which the computer receives the
incoming data signal, i.e. a positive voltage (+3V
to +15V) to represent a logic “0”, and a negative
voltage (-3V to -15V) to represent a logic “1”.
Again, inthisinstance, sincetheprinterwillnotbe
sending the PC any data, this line is not needed.
Data Set Ready (DSR)
Peripheraldevicesusethislinetotellthecomputer
that they are on–line and ready to communicate.
Whentheprinteristurnedonandhascompletedits
self–testroutine(assumingitdoesone),itwillsend
a signal to the PC by asserting this line.
Request To Send (RTS)
The computer activates this line to notify the
peripheraldevicethatitisreadytosenddata.Inthis
example, the computer notifies the printer that it is
ready to send data to be printed by the printer.
Clear To Send (CTS)
Thisisthelineonwhichtheperipheraldevicetells
the computer that it is ready to receive data from
the computer. If the printer was not ready, i.e. it
was out of paper, for example, it would not assert
thisline.Oncetheprinterwasreadytoreceivedata
from the PC, it would assert this line. When it
receives the CTS signal from the printer, the PC
knows that a data transmission path has been
established between itself and the printer.
Transmitted Data (TD or TX)
This is the pin on which the computer sends the
actual data signal representing the actual informa-
tion to be printed, i.e. a positive voltage (+3V to
+15V) to represent a logic “0”, and a negative
voltage (-3V to -15V) to represent a logic “1”.
Ring Indicator (RI)
This line is used by the peripheral device to tell the
computer that a remote device wants to start com-
municating. A modem would activate the RI line
to tell the computer that a remote modem was
calling, i.e. the phone is ringing. In the case of a
printer, this line is unused.
Data Carrier Detect (DCD)
This line is used by a peripheral device to tell the
computer to expect to start receiving data at any
time. Since the printer would not be sending data
to the PC in this case this line is not needed.
Date: 8/3/04
+ 5V Powered Multi-Channel RS-232 Drivers/Receivers
© Copyright 2004 Sipex Corporation
12
TYPICAL CIRCUITS
+5V INPUT
7
+5V INPUT
6
8
1–10µF
6.3V
V
C
C
C
C
+
-
CC
+
+
+
1
9
1–10µF
6.3V
V+
V-
+5V to +10V
Voltage Doubler
10
11
1
7
1–10µF
6.3V
+
-
2
2
V
1–10µF
16V
1–10µF
16V
13
+
C
C
C
C
+
-
CC
+10V to -10V
Voltage Inverter
+
+
+
1
8
1–10µF
6.3V
V+
V-
+5V to +10V
Voltage Doubler
12
5
9
1
10
400k Ω
+
-
2
2
1–10µF
16V
1–10µF
16V
12
+
+10V to -10V
Voltage Inverter
2
3
T
T
IN
IN
IN
IN
IN
T
1
11
4
T
OUT
OUT
1
1
400k Ω
400k Ω
4
T
2
T
1
2
2
2
3
T
IN
IN
IN
IN
T OUT
1
T
1
1
400k Ω
400k Ω
14
15
1
T
3
T
T
T
OUT
OUT
3
3
T
T
2
T
OUT
OUT
OUT
2
2
400k Ω
400k Ω
20
T
4
T
4
13
14
16
15
4
T
3
T
T
3
3
400k Ω
400k Ω
19
18
16
17
T
OUT
5
T
5
T
5
T
4
T
4
T
4
NC
SD
GND
6
GND 5
230A
234A
+5V INPUT
12
+5V INPUT
12
V
V
CC
CC
400k Ω
400k Ω
8
7
3
4
8
7
3
4
2
1
T
IN
T
OUT
OUT
OUT
OUT
T
IN
T
OUT
T
1
T
1
1
1
1
1
400k Ω
400k Ω
400k Ω
400k Ω
400k Ω
400k Ω
400k Ω
400k Ω
T
IN
IN
IN
IN
T
T
2
T
IN
IN
IN
IN
T
T
OUT
OUT
OUT
2
2
2
2
2
15
16
2
15
16
T
T
T
T
3
T
T
3
3
3
3
3
1
T
4
T
T
T
4
T
T
4
4
4
4
22
9
19
22
9
19
10
T
5
T
T
T
OUT
IN
T
T
OUT
IN
5
5
5
5
5
10
5
R
R
OUT
OUT
R
1
R
R
OUT
OUT
R
R
1
R
1
2
1
2
1
1
5k
Ω
5k
Ω
6
6
5
R
IN
R
IN
R
2
R
2
2
2
5k
5k
Ω
Ω
5k
5k
Ω
Ω
23
17
24
18
23
17
24
18
R
R
R
OUT
OUT
R
R
R
IN
IN
IN
R
R
R
OUT
OUT
R
R
R
IN
IN
IN
R
3
R
3
4
5
3
4
5
3
4
5
3
4
5
3
R
R
4
4
5k
5k
Ω
Ω
5k
5k
Ω
Ω
14
20
13
21
14
20
13
21
OUT
EN
OUT
EN
R
5
R
5
SD
SD
11
11
235A
235B
Date: 8/3/04
+ 5V Powered Multi-Channel RS-232 Drivers/Receivers
© Copyright 2004 Sipex Corporation
13
TYPICAL CIRCUITS
+5V INPUT
9
+5V INPUT
9
10
10
1–10µF
1–10µF
V
V
C
C
C
C
+
-
C
C
C
C
+
-
CC
6.3V
CC
+
+
+
+
6.3V
1
+
+
11
15
1
11
15
1–10µF
6.3V
1–10µF
6.3V
V+
V-
V+
V-
+5V to +10V
Voltage Doubler
+5V to +10V
Voltage Doubler
12
13
12
13
1
1
+
-
+
-
2
2
2
2
1–10µF
16V
1–10µF
16V
1–10µF
16V
+
1–10µF
16V
+
+10V to -10V
Voltage Inverter
+10V to -10V
Voltage Inverter
14
7
14
7
400k Ω
2
3
400k Ω
2
3
T
IN
IN
IN
IN
T OUT
1
T
IN
IN
IN
IN
T
OUT
T
1
T
1
1
1
1
400k Ω
400k Ω
400k Ω
400k Ω
400k Ω
400k Ω
6
6
T
T
T
OUT
OUT
T
T
T
OUT
OUT
2
2
2
2
2
2
18
19
1
18
19
1
T
T
T
T
3
T
T
3
3
3
3
3
24
24
T
4
T
T
T
OUT
IN
T
T
OUT
IN
4
4
4
4
4
5
4
5
4
R
R
OUT
OUT
R
R
R
R
OUT
OUT
R
R
R
1
R
1
2
1
1
2
1
1
5kΩ
5kΩ
22
23
22
23
IN
IN
R
R
2
2
2
2
5kΩ
5kΩ
5kΩ
5kΩ
17
20
16
21
17
20
16
21
R
OUT
EN
R
IN
R
OUT
EN
R
IN
R
R
3
3
3
3
3
3
SD
SD
GND
8
GND
8
236A
236B
+5V INPUT
+5V INPUT
9
9
10
1–10µF
6.3V
+
10
1–10µF
V
V
C
+
-
CC
C
C
C
C
+
-
+
CC
1
11
6.3V
+
+
+
1
1–10µF
6.3V
11
15
1–10µF
6.3V
V+
+5V to +10V
Voltage Doubler
V+
V-
+5V to +10V
Voltage Doubler
12
13
C
C
C
12
13
1
1
+
-
2
2
+
-
+
1–10µF
16V
1–10µF
16V
15
+
2
2
1–10µF
16V
+10V to -10V
Voltage Inverter
1–10µF
16V
+
V-
+10V to -10V
Voltage Inverter
14
5
14
7
400k Ω
2
1
400k Ω
2
3
T
IN
IN
IN
IN
T OUT
1
T
1
T
IN
IN
IN
IN
IN
T
OUT
OUT
OUT
T
1
1
1
1
400k Ω
400k Ω
400k Ω
18
400k Ω
400k Ω
400k Ω
400k Ω
6
T
T
2
T
OUT
OUT
OUT
IN
2
2
T
T
T
2
2
2
19
21
24
18
19
21
1
T
T
T
3
3
3
T
T
T
3
3
3
20
24
20
T
T
T
4
4
4
T
T
T
OUT
OUT
IN
4
4
4
6
4
7
3
R
R
OUT
OUT
R
R
R
T
1
2
1
T
T
5
1
5
5
5k
Ω
5
4
IN
IN
IN
R
2
3
4
R
OUT
OUT
R
R
R
2
1
2
1
1
5k
5k
Ω
Ω
5k
Ω
23
16
22
17
22
23
R
R
OUT
OUT
R
R
R
R
R
IN
IN
R
3
4
2
3
3
2
5k
5k
Ω
Ω
17
16
R
OUT
R
R
3
4
3
5k
Ω
GND
8
GND
8
237A
238A
Date: 8/3/04
+ 5V Powered Multi-Channel RS-232 Drivers/Receivers
© Copyright 2004 Sipex Corporation
14
TYPICAL CIRCUITS
+5V INPUT
19
V
CC
25
C
+
10µF
6.3V
1
26
+5V to +10V
Voltage Doubler
4.7µF
6.3V
V+
V-
27
28
C
–
1
10µF
16V
30
C
+
–
2
+10V to -10V
Voltage Inverter
4.7µF
16V
29
C
2
15
14
37
400k
7
8
6
T
T
IN
T
OUT
OUT
OUT
1
1
1
400k Ω
400k Ω
400k Ω
400k Ω
T
T
T
IN
2
2
2
T
IN
IN
IN
T
T
3
3
3
38
2
5
T
T
T
OUT
4
4
4
41
T
T OUT
5
T
5
5
SP240A/B
17
10
4
16
13
3
R
1
R IN
1
R
OUT
OUT
1
5k
5k
Ω
R
R
R
R IN
2
2
2
Ω
R
IN
IN
OUT
OUT
OUT
R
3
3
3
5k
5k
5k
Ω
Ω
Ω
39
36
40
35
R
R
R
R
R
4
5
4
4
IN
R
5
5
43
42
SD
EN
GND
18
240A/B
+5V INPUT
11
+5V INPUT
12
11
1–10µF
V
12
C
C
C
C
+
-
1–10µF
CC
+
6.3V
+
+
V
1
13
17
C
C
C
C
+
1–10µF
6.3V
CC
6.3V
+
+
+
V+
V-
1
13
+5V to +10V
Voltage Doubler
1–10µF
6.3V
V+
+5V to +10V
Voltage Doubler
14
15
1
14
15
-
1
2
2
+
-
2
2
1–10µF
16V
1–10µF
16V
+
+
-
+10V to -10V
Voltage Inverter
1–10µF
16V
1–10µF
16V
17
+
+10V to -10V
Voltage Inverter
V-
16
7
16
7
400k Ω
2
3
T
IN
IN
IN
IN
T OUT
1
T
400k Ω
2
3
1
1
T
IN
IN
IN
IN
T OUT
1
T
1
1
400k Ω
400k Ω
400k Ω
6
T
T
T
OUT
OUT
OUT
IN
400k Ω
6
2
2
2
T
T
2
T
OUT
OUT
OUT
IN
2
2
20
21
1
T
T
T
3
400k Ω
20
21
1
3
3
T
3
T
T
3
3
28
T
T
T
4
400k Ω
28
4
4
T
4
T
T
4
4
8
5
9
4
R
R
OUT
OUT
R
1
R
8
5
9
4
1
2
1
R
OUT
OUT
R
1
R
1
1
2
5k
Ω
5k
Ω
R
IN
R
2
2
R
R
IN
R
2
2
5k
5k
Ω
Ω
5k
5k
Ω
Ω
27
26
22
R
R
R
OUT
OUT
R
R
R
IN
IN
IN
R
27
26
22
3
4
5
3
4
5
3
R
R
R
OUT
OUT
R
R
R
IN
IN
IN
R
3
4
5
3
4
5
3
23
R
23
4
R
4
5k
5k
Ω
Ω
5k
5k
Ω
Ω
19
24
18
25
OUT
EN
R
19
24
18
25
5
OUT
EN
R
5
SD
GND
10
SD
GND
10
241A
241B
Date: 8/3/04
+ 5V Powered Multi-Channel RS-232 Drivers/Receivers
© Copyright 2004 Sipex Corporation
15
ORDERING INFORMATION
Model ....................................................................................... Temperature Range .................................................................... Package
SP230ACP ..................................................................................... 0°C to +70°C ............................................................................... 20 pin PDIP
SP230ACT ..................................................................................... 0°C to +70°C ............................................................................ 20 pin WSOIC
SP230ACT/TR ............................................................................... 0°C to +70°C ............................................................................ 20 pin WSOIC
SP230ACX ..................................................................................... 0°C to +70°C ............................................................................................ Dice
SP230AEP ................................................................................... –40°C to +85°C ............................................................................. 20 pin PDIP
SP230AET ................................................................................... –40°C to +85°C .......................................................................... 20 pin WSOIC
SP230AET/TR ............................................................................. –40°C to +85°C .......................................................................... 20 pin WSOIC
SP234ACP ..................................................................................... 0°C to +70°C ............................................................................... 16 pin PDIP
SP234ACT ..................................................................................... 0°C to +70°C ............................................................................ 16 pin WSOIC
SP234ACT/TR ............................................................................... 0°C to +70°C ............................................................................ 16 pin WSOIC
SP234ACX ..................................................................................... 0°C to +70°C ............................................................................................ Dice
SP234AEP ................................................................................... –40°C to +85°C ............................................................................. 16 pin PDIP
SP234AET ................................................................................... –40°C to +85°C .......................................................................... 16 pin WSOIC
SP234AET/TR ............................................................................. –40°C to +85°C .......................................................................... 16 pin WSOIC
SP235ACP ..................................................................................... 0°C to +70°C ............................................................................... 24 pin PDIP
SP235AEP ................................................................................... –40°C to +85°C ............................................................................. 24 pin PDIP
SP235BCP ..................................................................................... 0°C to +70°C ............................................................................... 24 pin PDIP
SP235BEP ................................................................................... –40°C to +85°C ............................................................................. 24 pin PDIP
SP236ACS ..................................................................................... 0°C to +70°C ............................................................................... 24 pin PDIP
SP236ACT ..................................................................................... 0°C to +70°C ............................................................................ 24 pin WSOIC
SP236ACT/TR ............................................................................... 0°C to +70°C ............................................................................ 24 pin WSOIC
SP236ACX ..................................................................................... 0°C to +70°C ............................................................................................ Dice
SP236AES ................................................................................... –40°C to +85°C ............................................................................. 24 pin PDIP
SP236AET ................................................................................... –40°C to +85°C .......................................................................... 24 pin WSOIC
SP236AET/TR ............................................................................. –40°C to +85°C .......................................................................... 24 pin WSOIC
SP236BCS ..................................................................................... 0°C to +70°C .............................................................................. 24 pin PDIP
SP236BCT ..................................................................................... 0°C to +70°C ............................................................................ 24 pin WSOIC
SP236BCT /TR .............................................................................. 0°C to +70°C ............................................................................ 24 pin WSOIC
SP236BCX ..................................................................................... 0°C to +70°C ............................................................................................ Dice
SP236BES ................................................................................... –40°C to +85°C ............................................................................. 24 pin PDIP
SP236BET ................................................................................... –40°C to +85°C .......................................................................... 24 pin WSOIC
SP236BET /TR ............................................................................ –40°C to +85°C .......................................................................... 24 pin WSOIC
SP237ACS ..................................................................................... 0°C to +70°C ............................................................................... 24 pin PDIP
SP237ACT ..................................................................................... 0°C to +70°C ............................................................................ 24 pin WSOIC
SP237ACT/TR ............................................................................... 0°C to +70°C ............................................................................ 24 pin WSOIC
SP237ACX ..................................................................................... 0°C to +70°C ............................................................................................ Dice
SP237AES ................................................................................... –40°C to +85°C ............................................................................. 24 pin PDIP
SP237AET ................................................................................... –40°C to +85°C .......................................................................... 24 pin WSOIC
SP237AET/TR ............................................................................. –40°C to +85°C .......................................................................... 24 pin WSOIC
Please consult factory for SP235B, SP236B, SP240B, SP241B, and dice.
Available in lead free packaging. To order add "-L" suffix to part number.
Example: SP230AEP = standard; SP230AEP-L = lead free
/TR = Tape and Reel
Pack quantity is 1,500 for WSOIC.
Corporation
ANALOG EXCELLENCE
Sipex Corporation
Headquarters and
Sales Office
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
Date: 8/3/04
+ 5V Powered Multi-Channel RS-232 Drivers/Receivers
© Copyright 2004 Sipex Corporation
16
ORDERING INFORMATION
SP238ACS ..................................................................................... 0°C to +70°C ............................................................................... 24 pin PDIP
SP238ACT ..................................................................................... 0°C to +70°C ............................................................................ 24 pin WSOIC
SP238ACT/TR ............................................................................... 0°C to +70°C ............................................................................ 24 pin WSOIC
SP238ACX ..................................................................................... 0°C to +70°C ............................................................................................ Dice
SP238AES ................................................................................... –40°C to +85°C ............................................................................. 24 pin PDIP
SP238AET ................................................................................... –40°C to +85°C .......................................................................... 24 pin WSOIC
SP238AET/TR ............................................................................. –40°C to +85°C .......................................................................... 24 pin WSOIC
SP240ACF ..................................................................................... 0°C to +70°C ................................................................ 44 pin Quad Flatpack
SP240BCF ..................................................................................... 0°C to +70°C ............................................................... 44 pin Quad Flatpack
SP241ACT ..................................................................................... 0°C to +70°C ............................................................................ 28 pin WSOIC
SP241ACT/TR ............................................................................... 0°C to +70°C ............................................................................ 28 pin WSOIC
SP241AET ................................................................................... –40°C to +85°C .......................................................................... 28 pin WSOIC
SP241AET/TR ............................................................................. –40°C to +85°C .......................................................................... 28 pin WSOIC
SP241BCT ..................................................................................... 0°C to +70°C ............................................................................ 28 pin WSOIC
SP241BCT/TR ............................................................................... 0°C to +70°C ............................................................................ 28 pin WSOIC
SP241BET ................................................................................... –40°C to +85°C .......................................................................... 28 pin WSOIC
SP241BET/TR ............................................................................. –40°C to +85°C .......................................................................... 28 pin WSOIC
Available in lead free packaging. To order add "-L" suffix to part number.
Example: SP230AET/TR = standard; SP230AET-L/TR = lead free
/TR = Tape and Reel
Pack quantity is 1,500 for WSOIC.
Corporation
ANALOG EXCELLENCE
Sipex Corporation
Headquarters and
Sales Office
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
Date: 8/3/04
+ 5V Powered Multi-Channel RS-232 Drivers/Receivers
© Copyright 2004 Sipex Corporation
17
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