SP331ET [SIPEX]
Programmable RS-232/RS-485 Transceiver; 可编程RS - 232 / RS - 485收发器
| 型号： | SP331ET |
| 厂家： | 
SIPEX CORPORATION |
| 描述： | Programmable RS-232/RS-485 Transceiver |
| 文件： | 总13页 (文件大小：172K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
SP331
Programmable RS-232/RS-485Transceiver
■ +5V Only Operation
■ Software Programmable RS-232 or
RS-485 Selection
■ Four RS-232 Transceivers in RS-232
Mode
■ Two RS-485 Full-Duplex Transceivers
in RS-485 Mode
■ Two RS-232 Transceivers and One
RS-485 Transceiver in Dual Mode
■ Self-Testing Loopback Mode
■ Full Driver Tri-State (Hi-Z) Control
■ Ideal for RS-232 to RS-485 conversion
DESCRIPTION…
The SP331 is a programmable RS-232 and/or RS-485 transceiver IC. The SP331 contains four
drivers and four receivers when selected in RS-232 mode; and two drivers and two receivers
when selected in RS-485 mode. The SP331 also contains a dual mode which has two RS-232
drivers/receivers plus one differential RS-485 driver/receiver.
The RS-232 transceivers can typically operate at 230kbps while adhering to the RS-232
specifications. TheRS-485transceiverscanoperateupto10MbpswhileadheringtotheRS-485
specifications. The SP331 includes a self-test loopback mode where the driver outputs are
internally configured to the receiver inputs. This allows for easy diagnostic serial port testing
without using an external loopback plug. The RS-232 and RS-485 drivers can be disabled
(High-Z output) by controlling a set of four select pins.
1
2
28
27
26
25
24
23
22
21
20
19
18
17
16
15
TI4
SEL_B
TX4
TX3
VCC
TX1
TX2
GND
C1+
V+ (VDD)
C2+
C1–
C2–
V– (VSS)
TI3
TI2
TI1
3
4
SEL_C
SEL_A
SEL_D
RX4
RX3
RX2
RX1
RI4
5
6
7
8
9
10
11
12
13
14
RI3
RI2
RI1
SP331DS/13
SP331 RS-232/RS-485 Serial Transceiver
© Copyright 2000 Sipex Corporation
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation
of the device at these ratings or any other above those
indicated in the operation sections of the specifications
below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may
affect reliability.
V
CC...........................................................................+7V
Package Derating:
28-pin Plastic DIP
øJA....................................................40°C/W
28-pin Plastic SOIC
øJA....................................................40°C/W
StorageTemperature..........................-65˚Cto+150˚C
Power Dissipation
28-pinPlasticDIP...........................1000mW
28-pin Plastic SOIC.......................1000mW
SPECIFICATIONS
Typically 25°C @ Vcc = +5V unless otherwise noted.
MIN.
TYP.
MAX.
UNITS
CONDITIONS
LOGIC INPUTS
VIL
VIH
0.8
Volts
Volts
2.0
LOGIC OUTPUTS
VOL
VOH
0.4
Volts
Volts
IOUT= -3.2mA
IOUT= 1.0mA
2.4
RS-232 DRIVER
DC Characteristics
HIGH Level Output
LOW Level Output
Open Circuit Voltage
Short Circuit Current
Power Off Impedance
+5.0
–15.0
–15
+15
–5.0
+15
Volts
Volts
Volts
mA
RL=3kΩ, VIN=0.8V
RL=3kΩ, VIN=2.0V
±100
VOUT = 0V
Vcc = 0V, Vout = ±2.0V
300
Ω
AC Characteristics
Slew Rate
30
V/µs
µs
RL=3kΩ, CL= 50pF
VCC = +5.0V, TA @ +25°C
RL=3kΩ, CL=2500pF ;
between ±3V, TA @ +25°C
RL=3kΩ, CL=2500pF
Transition Time
1.5
Maximum Data Rate
120
235
kbps
Propagation Delay
tPHL
tPLH
2
2
8
8
µs
µs
Measured from 1.5V of VIN
to 50% of VOUT; RL=3kΩ
RS-232 RECEIVER
DC Characteristics
HIGH Threshold
1.7
1.2
3.0
Volts
Volts
Volts
kΩ
LOW Threshold
Receiver Open Circuit Bias
Input Impedance
0.8
3
+2.0
7
5
VIN = +15V to –15V
AC Characteristics
Maximum Data Rate
Propagation Delay
tPHL
120
235
kbps
0.25
0.25
1
1
µs
µs
Measured from 50% of VIN
to 1.5V of VOUT.
tPLH
RS-485 DRIVER
DC Characteristics
Open Circuit Voltage
Differential Output
6.0
5.0
Volts
Volts
1.5
RL=54Ω, CL=50pF
SP331DS/13
SP331 RS-232/RS-485 Serial Transceiver
© Copyright 2000 Sipex Corporation
2
SPECIFICATIONS
Typically 25°C @ Vcc = +5V unless otherwise noted.
MIN.
TYP.
MAX.
UNITS
CONDITIONS
|VT| - |VT|
RS-485 DRIVER
Balance
Common-Mode Output
±0.2
3.0
Volts
Volts
mA
Output Current
Short Circuit Current
28.0
10
RL=54Ω
Terminated in –7V to +10V
±250
mA
AC Characteristics
Maximum Data Rate
Output Transition Time
Propagation Delay
tPHL
Mbps
ns
RL=54Ω
Rise/fall time, 10%–90%
See Figures 2 & 4
RDIFF=54Ω, CL1=CL2=100pF
RDIFF=54Ω, CL1=CL2=100pF
per Figure 4, tSKEW = | tDPLH - tDPHL
30
50
80
80
10
120
120
20
ns
ns
ns
tPLH
Driver Output Skew
|
RS-485 RECEIVER
DC Characteristics
Inputs
Common Mode Range
Receiver Sensitivity
Input Impedance
–7.0
12
+12.0
±0.3
Volts
Volts
kΩ
±0.2
15
–7V ≤ VCM ≤ +12V
–7V ≤ VCM ≤ +12V
AC Characteristics
Maximum Data Rate
Propagation Delay
tPHL
10
Mbps
See Figures 2 & 6
130
130
10
200
200
20
ns
ns
ns
RDIFF=54Ω, CL1=CL2=100pF
RDIFF=54Ω, CL1=CL2=100pF
tSKEW = | tPLH – tPHL |; RDIFF=54Ω,
CL1=CL2=100pF
tPLH
Differential Receiver Skew
ENABLE TIMING
RS-485 Driver
Enable Time
Enable to Low
Enable to High
Disable Time
See Figures 3 & 5
CL=15pF, S1 Closed
CL=15pF, S2 Closed
See Figures 3 & 5
CL=15pF, S1 Closed
CL=15pF, S2 Closed
90
90
150
150
ns
ns
Disable From Low
Disable From High
80
80
120
120
ns
ns
POWER REQUIREMENTS
Supply Voltage VCC
+4.75
+5.25
Volts
Supply Current ICC
No Load (Tx Disabled)
No Load (RS-232 Mode)
No Load (RS-485 Mode)
10
15
7
15
30
20
mA
mA
mA
SEL_A ➨ SEL_D = "0001"
SEL_A ➨ SEL_D = "0000"
SEL_A ➨ SEL_D = "1100"
ENVIRONMENTAL
Operating Temperature
Commercial (..C..)
Industrial (..E..)
0
–40
–65
+70
+85
+150
°C
°C
°C
Storage Temperature
SP331DS/13
SP331 RS-232/RS-485 Serial Transceiver
© Copyright 2000 Sipex Corporation
3
RECEIVER INPUT GRAPH
RS-485 RECEIVER
+1.0mA
+12V
–7V –3V
+6V
1 Unit Load
Maximum Input Current
versus Voltage
–0.6mA
TEST CIRCUITS
A
C
C
L1
R
R
A
B
A
B
DI
R
L
RO
V
OD
L2
15pF
V
OC
B
Figure 1. Driver DC Test Load Circuit
Figure 2. Driver/Receiver Timing Test Circuit
V
CC
S
S
1
500Ω
Output
Under
Test
C
L
2
Figure 3. Driver Timing Test Load #2 Circuit
SP331DS/13
SP331 RS-232/RS-485 Serial Transceiver
© Copyright 2000 Sipex Corporation
4
SWITCHING WAVEFORMS
f ≥ 1MHz; t ≤ 10ns; t ≤ 10ns
R
F
+3V
1.5V
1.5V
DRIVER INPUT
0V
t
t
PHL
PLH
B
1/2V
1/2V
O
O
DRIVER
OUTPUT
V
O
A
t
t
DPLH
DPHL
+
V
V
DIFFERENTIAL
OUTPUT
O
0V
–
V – V
A
O
B
t
t
F
R
t
= |t
- t
|
SKEW
DPLH DPHL
Figure 4. Driver Propagation Delays
f = 1MHz; tR < 10ns; tF < 10ns
1.5V
+3V
DE
1.5V
0V
tZL
2.3V
tLZ
5V
A, B
Output normally LOW
Output normally HIGH
0.5V
0.5V
VOL
VOH
A, B
2.3V
tZH
0V
tHZ
Figure 5. Driver Enable and Disable Times
f = 1MHz; tR ≤ 10ns; tF ≤ 10ns
+
–
V0D2
0V
0V
A – B
INPUT
V0D2
VOH
RECEIVER OUT
VOL
1.5V
1.5V
OUTPUT
tPHL
tPLH
Figure 6. Receiver Propagation Delays
SP331DS/13
SP331 RS-232/RS-485 Serial Transceiver
© Copyright 2000 Sipex Corporation
5
TTL
Input
Driver
Output
Figure 7. Typical RS-232 Driver Output
Figure 8. Typical RS-485 Driver Output
SP331DS/13
SP331 RS-232/RS-485 Serial Transceiver
© Copyright 2000 Sipex Corporation
6
1
2
28
27
26
25
24
23
22
21
20
19
18
17
16
15
TI4
SEL_B
TX4
TX3
VCC
TX1
TX2
GND
C1+
TI3
TI2
TI1
3
4
SEL_C
SEL_A
SEL_D
RX4
RX3
RX2
RX1
RI4
5
6
7
8
9
10
11
12
13
14
V+ (VDD)
C2+
C1–
C2–
V– (VSS)
RI3
RI2
RI1
Figure 9. SP331 Pinout
+5V
+5V
5
5
9
9
C1+
VCC
VCC
C1+
0.1µF
0.1µF
10
14
0.1µF
12
10
14
0.1µF
C1-
12
11
V+
V+
V-
C1-
11
SP331
C2+
SP331 V-
C2+
0.1µF
0.1µF
13
13
0.1µF
23
C2-
24
0.1µF
C2-
24
2
0V
0V
SEL A
+5V
+5V
SEL A
SEL B
23
SEL D
0V
2
0V
SEL D
TX1
SEL B
Vcc
Vcc
TX2
7
400KΩ
400KΩ
RS-485
26
27
6
7
TI1
26 TI1
27 TI2
28 TI3
TTL/CMOS
TTL/CMOS
T1
RS-232
RS-232
TTL/CMOS
T1
Vcc
6
3
TX1
TX4
RS-485
RS-485
400KΩ
400KΩ
TI2
Vcc
TX2
TX3
400KΩ
T2
TTL/CMOS
TTL/CMOS
28 TI3
Vcc
TTL/CMOS
T3
R1
4
TX3
RS-485
RS-485
4
1
TI4
T3
RS-232
RS-232
TTL/CMOS
TTL/CMOS
RI2 16
Vcc
19 RX1
400KΩ
15KΩ
15KΩ
TX4
3
RI1 15
1
TI4
RS-485
T4
R1
20
TTL/CMOS
TTL/CMOS
RX2
15KΩ
TTL/CMOS
TTL/CMOS
TTL/CMOS
RI4 18
RS-485
RS-485
21 RX3
RX1
RI1 15
19
R3
RS-232
RS-232
RI3 17
5KΩ
15KΩ
22
16
RI2
20 RX2
21 RX3
RX4
TTL/CMOS
TTL/CMOS
R2
R3
25
5KΩ
5KΩ
0V
8
SEL C
GND
RI3 17
RI4 18
25
RS-232
RS-232
22 RX4
TTL/CMOS
R4
5KΩ
8
GND
SEL C
0V
Figure 10. Typical Operating Circuit
SP331DS/13
SP331 RS-232/RS-485 Serial Transceiver
© Copyright 2000 Sipex Corporation
7
FUNCTION TABLE FOR SELECT PINS
A
0
0
0
0
B
0
0
0
0
C
0
0
D
0
1
MODE
RS-232
RS-232
RS-232
RS-232
FUNCTION
All four RS-232 drivers active
All four RS-232 drivers tri-state
All four RS-232 drivers tri-state
RS-232 (4ch) Loopback
1
0
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
1
0
1
RS-232/RS-485 T1 and T2 active RS-232; T3 tri-state RS-485
RS-232/RS-485 T1 and T2 tri-state RS-232; T3 active RS-485
RS-232/RS-485 T1 and T2 active RS-232; T3 tri-state RS-485
RS-232/RS-485 RS-232 (2ch) / RS-485 (1ch) Loopback
1
1
1
1
0
0
0
0
0
0
1
1
0
1
0
1
RS-485/RS-232 T1 active RS-485; T2 and T3 active RS-232
RS-485/RS-232 T1 tr-state RS-485; T3 active RS-232; T4 active RS232
RS-485/RS-232 All RS-485 and RS-232 drivers tri-state
RS-485/RS-232 RS-485 (1ch) / RS-232 (2ch) Loopback
1
1
1
1
1
1
1
1
0
0
1
1
0
1
0
1
RS-485
RS-485
RS-485
RS-485
T1 and T3 active RS-485
T1 tri-state RS-485; T3 active RS-485
T1 active RS-485; T3 tri-state RS-485
RS-485 (2ch) Loopback
Table 1. Mode Function Table. (Refer to Control Logic Confirmations for Block Diagrams)
THEORY OF OPERATION
+5V, the voltage potential across capacitor C2
is now 10V.
The SP331 is made up of four separate circuit
blocks — the charge pump, drivers, receivers,
and decoder. Each of these circuit blocks is
described in more detail below.
Phase 2
— VSS transfer — Phase two of the clock con-
nects the negative terminal of C2 to the VSS
storage capacitor and the positive terminal of C2
to ground, and transfers the generated –l0V to
C3. Simultaneously, the positive side of capaci-
tor C 1 is switched to +5V and the negative side
is connected to ground.
Charge–Pump
The charge pump is a Sipex–patented design
(U.S. 5,306,954) and uses a unique approach
compared to older less efficient designs. The
charge pump still requires four external
capacitors, but uses a four–phase voltage
shifting technique to attain symmetrical 10V
power supplies. Figure 15(a) shows the
waveform found on the positive side of capcitor
C2, and Figure 15(b) shows the negative side of
capcitor C2. There is a free–running oscillator
that controls the four phases of the voltage
shifting. A description of each phase follows.
Phase 3
— VDD charge storage — The third phase of the
clock is identical to the first phase — the charge
transferred in C1 produces –5V in the negative
terminal of C1, which is applied to the negative
+
side of capacitor C2. Since C2 is at +5V, the
voltage potential across C2 is l0V.
Phase 1
Phase 4
— VSS charge storage —During this phase of
the clock cycle, the positive side of capacitors
C1 and C2 are initially charged to +5V. Cl+– is
then switched to ground and charge on C1 is
— VDD transfer — The fourth phase of the
clock connects the negative terminal of C2 to
ground and transfers the generated l0V across
C2 to C4, the VDD storage capacitor. Again,
–
+
transferred to C2 . Since C2 is connected to
SP331DS/13
SP331 RS-232/RS-485 Serial Transceiver
© Copyright 2000 Sipex Corporation
8
simultaneously with this, the positive side of
capacitorC1 isswitchedto+5Vandthenegative
sideisconnectedtoground, andthecyclebegins
again.
V
= +5V
CC
C
+
+5V
4
–
+
V
V
Storage Capacitor
Storage Capacitor
DD
SS
+
–
+
–
C
C
2
1
–
Since both V+ and V– are separately generated
fromVCC inano–loadcondition, V+andV– will
be symmetrical. Older charge pump approaches
that generate V– from V+ will show a decrease
in the magnitude of V– compared to V+ due to
the inherent inefficiencies in the design.
C
–5V
–5V
3
Figure 11. Charge Pump Phase 1.
V
= +5V
CC
C
+
4
The clock rate for the charge pump typically
operates at 15kHz. The external capacitors must
be 0.1µF with a 16V breakdown rating.
–
+
V
V
Storage Capacitor
Storage Capacitor
DD
SS
+
–
+
–
C
C
2
1
–
C
–10V
3
External Power Supplies
For applications that do not require +5V only,
external supplies can be applied at the V+ and
V– pins. The value of the external supply volt-
ages must be no greater than ±l0V. The current
drain for the ±10V supplies is used for RS-232.
For the RS-232 driver the current requirement
will be 3.5mA per driver. The external power
supplies should provide a power supply se-
quence of :+l0V, then +5V, followed by –l0V.
Figure 12. Charge Pump Phase 2.
V
= +5V
CC
C
+
+5V
4
–
+
V
V
Storage Capacitor
Storage Capacitor
DD
+
–
+
–
C
C
2
1
–
SS
C
–5V
–5V
3
Figure 13. Charge Pump Phase 3.
V
= +5V
CC
C
+10V
4
+
–
V
Storage Capacitor
Storage Capacitor
DD
SS
+
–
+
–
C
C
2
1
+
3
–
V
C
Figure 14. Charge Pump Phase 4.
+10V
a) C2+
GND
GND
b) C2-
-10V
Figure 15. Charge Pump Waveforms
SP331DS/13
SP331 RS-232/RS-485 Serial Transceiver
© Copyright 2000 Sipex Corporation
9
without causing oscillation. To ensure a desired
state of the receiver output, a pull–up resistor of
100kΩ to +5V should be connected to the in-
verting input for a logic low, or the non–invert-
ing input for a logic high. For single-ended
receivers,apull–downresistortogroundof5kΩ
is internally connected, which will ensure a
logic high output.
Drivers
TheSP331hasfourindependentRS-232single-
ended drivers and two differential RS-485 driv-
ers. Control for the mode selection is done via
a four–bit control word. The drivers are pre-
arranged such that for each mode of operation
the relative position and functionality of the
drivers are set up to accommodate the selected
interface mode. As the mode of the drivers is
changed,theelectricalcharacteristicswillchange
to support the requirements of clock, data, and
control line signal levels. Unused driver inputs
can be left floating; however, to ensure a desired
state with no input signal, pull–up resistors to
+5V or pull–down resistors to ground are sug-
gested. Since the driver inputs are both TTL or
CMOS compatible, any value resistor less than
100kΩ will suffice.
The RS-232 receiver has a single–ended input
with a threshold of 0.8V to 2.4V. The RS-232
receiver has an operating voltage range of ±15V
and can receive signals up to 120kbps. RS-232
receivers are used in RS-232 mode for all signal
types include data, clock, and control lines of
the RS-232 serial port.
The differential RS-485 receiver has an input
impedance of 15kΩ and a differential threshold
of ±200mV. Since the characteristics of an RS-
422 receiver are actually subsets of RS-485, the
receivers for RS-422 requirements are identical
to the RS-485 receivers. All of the differential
receivers can receive data up to 10Mbps.
When in RS-232 mode, the single-ended RS-
232 drivers produce compliant RS-232E and
ITU V.28 signals. Each of the four drivers
output single-ended bipolar signals in access of
±5V with a full load of 3kΩ and 2500pF applied
as specified. These drivers can also operate at
least 120kbps.
Select Mode Pins
Similar to our SP500 family of multiprotocol
products, theSP331 hastheabilitytochangethe
configuration of the drivers and receivers via a
4–bit switch. Referring to Table 1; RS-232
mode, RS-485 mode, or two different combina-
tions of RS-232/RS-485 can be configured us-
ing the SEL_A and SEL_B pins. The drivers
can be put into tri-state mode by using the
SEL_C and SEL_D pins. All receivers remain
active during any tri-state condition of the driv-
ers.
When programmed to RS-485 mode, the differ-
ential RS-485 drivers produce complaint RS-
485 signals. Each RS-485 driver outputs a uni-
polarsignaloneachoutputpinwithamagnitude
of at least 1.5V while loaded with a worst case
of 54Ω between the driver's two output pins.
The signal levels and drive capability of the RS-
485 drivers allow the drivers to also comply
with RS-422 levels. The transmission rate for
the differential drivers is 10Mbps.
Receivers
Loopback Mode
TheSP331hasfoursingle-endedreceiverswhen
programmed for RS-232 mode and two differ-
ential receivers when programmed for RS-485
mode.
Loopback is invoked by asserting "xx11" into
the select pins. In RS-232/RS-485 or RS-485/
RS-232 loopback mode, the RS-232 driver out-
puts loop back into the RS-232 receiver inputs
and the RS-485 differential driver loops back
into the RS-485 receiver. During loopback, the
driver outputs and receiver inputs are discon-
nected from the outside world. The driver
outputsareintri-stateandthereceiverinputsare
disabled. The input impedance of the receivers
during loopback is approximately 15kΩ to
ground.
Control for the mode selection is done via a 4–
bit control word, as in the drivers. As the oper-
ating mode of the receivers is changed, the
electrical characteristics will change to support
the requirements of the appropriate serial stan-
dard. Unusedreceiverinputscanbeleftfloating
SP331DS/13
SP331 RS-232/RS-485 Serial Transceiver
© Copyright 2000 Sipex Corporation
10
SP331 CONTROL LOGIC CONFIGURATION (Refer to Table 1)
0
0
0
0
0
0
0
1
0
0
1
0
0
1
0
0
0
1
0
1
0
1
1
0
1
0
0
0
1
0
0
1
1
0
1
0
1
1
0
0
1
1
0
1
1
1
1
0
SEL A
SEL B
SEL C
SEL D
TX1
6
26 TI1
27 TI2
28 TI3
TX1
TX2
TX3
6
26 TI1
27 TI2
T1
T2
T1
T2
T3
TX1 6
TX1
TX2
6
7
26 TI1
28 TI3
26 TI1
28 TI3
T1
T1
TX2 7
7
4
7
TX2
TX3 4
TX4 3
T3
T4
TX3
TX4
4
3
TX3
TX4
4
3
28 TI3
T3
T3
3
1
TI4
TX4
1
TI4
T4
19 RX1
20 RX2
21 RX3
RI1 15
RI2 16
RI3 17
RI4 18
19 RX1
20 RX2
RI1 15
RI2 16
R1
R2
R3
R4
RI1 15
RI2 16
RI1 15
RI2 16
R1
R2
RX1
19
19 RX1
21 RX3
R1
R1
21 RX3
22 RX4
RI3 17
RI4 18
R3
R4
RI3 17
RI4 18
RI3 17
21 RX3
R3
R3
18
RI4
22 RX4
SP331 LOOPBACK (Refer to Table 1)
SEL A
SEL B
SEL C
SEL D
0
0
1
1
0
1
1
1
1
1
1
1
1
0
1
1
26 TI1
27 TI2
TX1
TX2
6
7
26 TI1
27 TI2
28 TI3
6
7
4
TX1
TX2
TX3
T1
T2
TX1
6
T1
T2
T3
TX1 6
TX2 7
26 TI1
26 TI1
T1
T1
TX2 7
TX3 4
TX4 3
28 TI3
T3
T4
TX3 4
TX3
TX4
4
3
28 TI3
28 TI3
T3
T3
TX4
3
1
TI4
3
1
TI4
TX4
T4
19
RX1
19 RX1
RI1 15
RI1 15
RI2 16
RI1 15
RI216
R1
RI1 15
RI2 16
R1
19 RX1
21 RX3
19 RX1
R1
R1
R3
20 RX2
21 RX3
RX2
20
16
17
18
RI2
RI3
RI4
R2
R3
R2
R3
R4
21 RX3
22 RX4
RI3 17
RI4 18
R3
RI3 17
RI4 18
RI3 17
21 RX3
18
RI4
22
RX4
R4
SP331DS/13
SP331 RS-232/RS-485 Serial Transceiver
© Copyright 2000 Sipex Corporation
11
PACKAGE: 28-PIN PLASTIC
SMALL OUTLINE (SOIC)
E
H
D
A
Ø
A1
L
e
B
DIMENSIONS (Inches)
Minimum/Maximum
(mm)
28–PIN
A
A1
B
D
E
0.093/0.104
(2.352/2.649)
0.004/0.012
(0.102/0.300)
0.013/0.020
(0.330/0.508)
0.698/0.706
(17.73/17.93)
0.291/0.299
(7.402/7.600)
e
0.050 BSC
(1.270 BSC)
H
L
0.394/0.419
(10.00/10.64)
0.016/0.050
(0.406/1.270)
Ø
0°/8°
(0°/8°)
SP331DS/13
SP331 RS-232/RS-485 Serial Transceiver
© Copyright 2000 Sipex Corporation
12
ORDERING INFORMATION
Model
Temperature Range
Package Types
SP331CT ........................................................................... 0°C to +70°C .................................................................................. 28-pin Plastic SOIC
SP331ET ........................................................................ -40°C to +85°C .................................................................................. 28-pin Plastic SOIC
Please consult the factory for pricing and availability on a Tape-On-Reel option.
Co rp o ra tio n
SIGNAL PROCESSING EXCELLENCE
Sipex Corporation
Headquarters and
Sales Office
22 Linnell Circle
Billerica, MA 01821
TEL: (978) 667-8700
FAX: (978) 670-9001
e-mail: sales@sipex.com
Sales Office
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the
application or use of any product or circuit described hereing; neither does it convey any license under its patent rights nor the rights of others.
SP331DS/13
SP331 RS-232/RS-485 Serial Transceiver
© Copyright 2000 Sipex Corporation
13
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