SP3243UEA-L [SIPEX]
Line Transceiver, 3 Func, 3 Driver, 5 Rcvr, CMOS, PDSO28, LEAD FREE, MO-150AH, SSOP-28;
| 型号： | SP3243UEA-L |
| 厂家： | 
SIPEX CORPORATION |
| 描述： | Line Transceiver, 3 Func, 3 Driver, 5 Rcvr, CMOS, PDSO28, LEAD FREE, MO-150AH, SSOP-28 驱动 光电二极管 接口集成电路 驱动器 |
| 文件： | 总24页 (文件大小：282K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
SP3223U/3243U
High Speed Intelligent +3.0V to +5.5V
RS-232 Transceivers
■ Meets true EIA/TIA-232-F Standards
from a +3.0V to +5.5V power supply
■ Interoperable with EIA/TIA-232 and
adheres to EIA/TIA-562 down to a +2.7V
power source
EN
20
1
2
3
4
5
6
7
SHUTDOWN
VCC
19
C1+
V+
GND
18
C1-
T1OUT
R1IN
17
SP3223U 16
15
®
■ AUTO ON-LINE circuitry automatically
C2+
C2-
V-
wakes up from a 1µA shutdown
■ Regulated Charge Pump Yields Stable
RS-232 Outputs Regardless of VCC
Variations
R1OUT
14
13
ONLINE
T1IN
T2OUT
R2IN
8
9
■ ESD Specifications:
12 T2IN
11 STATUS
+2kV Human Body Model
10
R2OUT
■ 1000 Kbps minimum transmission rate
■ Ideal for High Speed RS-232 Applications
Now Available in Lead Free Packaging
DESCRIPTION
The SP3223U and SP3243U products are RS-232 transceiver solutions intended for portable or hand-
held applications such as notebook and palmtop computers. The "U" series is based on Sipex's SP3223/
SP3243 series and has been enhanced for high speed. The data rate is improved to 1000kbps, easily
meeting the demands of high speed RS-232 applications. The SP3223U and SP3243U use an internal
high-efficiency, charge-pumppowersupplythatrequiresonly0.1µFcapacitorsin3.3Voperation. This
chargepumpandSipex'sdriverarchitectureallowtheSP3223U/SP3243UseriestodelivercompliantRS-
232 performance from a single power supply ranging from +3.0V to +5.5V. The SP3223U is a 2-driver/
2-receiverdevice,andtheSP3243Uisa3-driver/5-receiverdevice,idealforlaptop/notebookcomputer
and PDA applications. The SP3243U includes one complementary receiver that remains alert to
monitor an external device's Ring Indicate signal while the device is shutdown.
The AUTO ON-LINE® feature allows the device to automatically "wake-up" during a shutdown state
when an RS-232 cable is connected and a connected peripheral is turned on. Otherwise, the device
automatically shuts itself down drawing less than 1µA.
SELECTION TABLE
Device
Power Supplies RS-232
RS-232
External
Components
TTL 3-State
No. of
Pins
Auto-Online
Circuitry
Drivers Receivers
SP3223U
SP3243U
+3.0V to +5.5V
+3.0V to +5.5V
2
3
2
5
4 capacitors
4 capacitors
YES
YES
YES
YES
20
28
Applicable U.S. Patents - 5,306,954; and other patents pending.
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
1
Power Dissipation per package
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 and cause permanent damage to the
device.
20-pin PDIP (derate 16.0mW/oC above+70oC).....1300mW
20-pin SSOP (derate 9.25mW/oC above +70oC)....750mW
20-pin TSSOP (derate 11.1mW/oC above +70oC)..900mW
28-pin SOIC (derate 12.7mW/oC above +70oC)....1000mW
28-pin SSOP (derate 11.2mW/oC above +70oC).....900mW
28-pin TSSOP (derate 13.2mW/oC above +70oC)......1059mW
32-pin QFN (derate 29.4mW/oC above +70oC)........2352mW
VCC.......................................................-0.3V to +6.0V
V+ (NOTE 1).......................................-0.3V to +7.0V
V- (NOTE 1)........................................+0.3V to -7.0V
V+ + |V-| (NOTE 1)...........................................+13V
ICC (DC VCC or GND current).........................+100mA
Input Voltages
TxIN, ONLINE,
SHUTDOWN, EN (SP3223U)...........-0.3V to +6.0V
RxIN...................................................................+25V
Output Voltages
TxOUT.............................................................+13.2V
RxOUT, STATUS.......................-0.3V to (VCC + 0.3V)
Short-Circuit Duration
TxOUT.....................................................Continuous
Storage Temperature......................-65°C to +150°C
NOTE 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.
ELECTRICAL CHARACTERISTICS
Unless otherwise noted, the following specifications apply for VCC = +3.0V to +5.5V with TAMB = TMIN to TMAX
,
C1 - C4 = 0.1µF. Typical values apply at VCC = +3.3V or +5.0V and TAMB = 25°C.
PARAMETER
MIN.
TYP.
MAX. UNITS CONDITIONS
DC CHARACTERISTICS
®
Supply Current,AUTO ON-LINE
1.0
10
µA
All RxIN open, ONLINE = GND,
SHUTDOWN = VCC, VCC = +3.3V,
TAMB = +25°C, TxIN = GND or VCC
Supply Current, Shutdown
Supply Current,
1.0
0.3
10
µA
SHUTDOWN = GND, VCC = +3.3V,
TAMB = +25°C, TxIN = VCC or GND
1.0
mA
ONLINE = SHUTDOWN = VCC, no load,
VCC = +3.3V, TAMB = +25°C, TxIN = GND or VCC
®
AUTO ON-LINE Disabled
LOGIC INPUTS AND RECEIVER OUTPUTS
Input Logic Threshold
LOW
VCC = +3.3V or +5.0V, TxIN, EN(SP3223U),
ONLINE, SHUTDOWN
0.8
V
V
HIGH
2.4
Input Leakage Current
±0.01
±0.05
±1.0
µA
TxIN, EN, ONLINE, SHUTDOWN,
TAMB = +25°C, VIN = 0V to VCC
Output Leakage Current
Output Voltage LOW
Output Voltage HIGH
DRIVER OUTPUTS
Output Voltage Swing
±10
µA
V
Receivers disabled, VOUT = 0V to VCC
IOUT = 1.6mA
0.4
VCC - 0.6 VCC - 0.1
V
IOUT = -1.0mA
±5.0
±5.4
±35
V
All driver outputs loaded with 3KΩ to GND,
TAMB = +25°C
Output Resistance
300
Ω
VCC = V+ = V- = 0V, VOUT = ±2V
Output Short-Circuit Current
Output Leakage Current
±60
±25
mA
µA
VOUT = 0V
VCC = 0V or 3.0V to 5.5V, VOUT = ±12V,
Drivers disabled
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
2
ELECTRICAL CHARACTERISTICS
Unless otherwise noted, the following specifications apply for VCC = +3.0V to +5.5V with TAMB = TMIN to TMAX
,
C1 - C4 = 0.1µF. Typical values apply at VCC = +3.3V or +5.0V and TAMB = 25°C.
PARAMETER
MIN.
TYP.
MAX. UNITS CONDITIONS
RECEIVER INPUTS
Input Voltage Range
Input Threshold LOW
Input Threshold LOW
Input Threshold HIGH
Input Threshold HIGH
Input Hysteresis
-25
0.6
0.8
25
V
V
1.2
1.5
1.5
1.8
0.3
5
VCC = 3.3V
VCC = 5.0V
VCC = 3.3V
VCC = 5.0V
V
2.4
2.4
V
V
V
Input Resistance
3
7
kΩ
®
AUTO ON-LINE CIRCUITRY CHARACTERISTICS (ONLINE = GND, SHUTDOWN = VCC
)
STATUS Output Voltage LOW
STATUS Output Voltage HIGH
Receiver Threshold to Drivers
0.4
V
V
IOUT = 1.6mA
IOUT = -1.0mA
Figure 19
VCC - 0.6
200
0.5
µS
Enabled (tONLINE
)
Receiver Positive or Negative
Threshold to STATUS HIGH
µS
µS
Figure 19
Figure 19
(tSTSH
)
Receiver Positive or Negative
Threshold to STATUS LOW
20
(tSTSL
)
TIMING CHARACTERISTICS
Maximum Data Rate
1000
Kbps RL = 3KΩ, CL = 250pF, one driver active
Receiver Propagation Delay
tPHL
tPLH
0.15
0.15
µs
Receiver input to Receiver output, CL = 150pF
Receiver Output Enable Time
Receiver Output Disable Time
Driver Skew
200
200
100
50
ns
ns
ns
ns
Normal operation
Normal operation
| tPHL - tPLH
| tPHL - tPLH
|
|
Receiver Skew
Transition-Region Slew Rate
90
V/µs VCC = 3.3V, RL = 3KΩ, TAMB = 25°C,
measurements taken from -3.0V to +3.0V or
+3.0V to -3.0V
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
3
TYPICAL PERFORMANCE CHARACTERISTICS
Unless otherwise noted, the following performance characteristics apply for VCC = +3.3V, 1000kbps data rate, all drivers
loaded with 3kΩ, 0.1µF charge pump capacitors, and TAMB = +25°C.
6
4
200
150
100
50
2
1Driver at 1Mbps
Other Drivers at 62.5Kbps
All Drivers Loaded with 3K // 250pF
0
-2
-4
-6
T1 at 500Kbps
T2 at 31.2Kbps
All TX loaded 3K // CLoad
0
0
250
500
1000
1500
2000
2.7
3
3.5
4
4.5
5
Load Capacitance (pF)
Supply Voltage (V)
Figure 1. Transmitter Skew VS. Load Capacitance for
the SP3223U / SP3243U
Figure 2. Transmitter Output Voltage VS. Supply
Voltage for the SP3223U
35
30
25
20
6
4
T1 at 1Mbps
T2 at 62.5Kbps
2
0
-2
-4
-6
15
T1 at 1Mbps
T2 at 62.5Kbps
10
5
0
0
250
500
1000
1500
0
250
500
1000
1500
Load Capacitance (pF)
Load Capacitance (pF)
Figure 3. Transmitter Output Voltage VS. Load
Capacitance for the SP3223U
Figure 4. Supply Current VS. Load Capacitance for the
SP3223U
6
4
20
15
2
T1 at 1Mbps
0
-2
-4
-6
10
T2 at 62.5Kbps
All Drivers loaded
with 3K//250pF
T1 at 1Mbps
T2 at 62.5Kbps
All Drivers loaded
5
with 3K//250pF
0
2.7
3
3.5
4
4.5
5
2.7
3
3.5
4
4.5
5
Supply Voltage (V)
Supply Voltage (V)
Figure 5. Supply Current VS. Supply Voltage for the
SP3223U
Figure 6. Transmitter Output Voltage VS. Supply
Voltage for the SP3223U
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
4
TYPICAL PERFORMANCE CHARACTERISTICS
Unless otherwise noted, the following performance characteristics apply for VCC = +3.3V, 1000kbps data rate, all drivers
loaded with 3kΩ, 0.1µF charge pump capacitors, and TAMB = +25°C.
6
4
120
100
80
60
40
20
0
2Mbps
1.5Mbps
1 TX at 1Mbps
2 TX’s at 62.5Kbps
All TX loaded 3K // CLoad
1Mbps
2
Slew +
Slew -
1 TX at full data rate
2 TX’s at1/16 data rate
0
-2
-4
-6
1Mbps
1.5Mbps
2Mbps
0
250
500
1000
1500
2000
0
250
500
1000
1500
2000
Load Capacitance (pF)
Load Capacitance (pF)
Figure 7. Transmitter Output Voltage VS. Load
Capacitance for the SP3243U
Figure 8. Slew Rate VS. Load Capacitance for the
SP3243U
50
30
25
1.5 Mbps
40
1 Mbps
2 Mbps
20
30
20
10
0
1 Driver at 1Mbps
Other Drivers at 62.5Kbps
All Drivers Loaded with 3K // 250pF
15
1 TX at full data rate
2 TX’s at 1/16 data rate
All TX loaded 3K // CLoad
10
5
0
0
250
500
1000
1500
2.7
3
3.5
4
4.5
5
Supply Voltage (V)
Load Capacitance (pF)
Figure 9. Supply Current VS. Load Capacitance for the
SP3243U
Figure 10. Supply Current VS. Supply Voltage for the
SP3243U
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
5
PIN NUMBER
SP3243UCR
QFN
NAME
FUNCTION
SP3223U
SP3243U
EN
Receiver Enable. Apply logic LOW for normal operation.
1
-
-
Apply logic HIGH to disable the receiver outputs (high-Z state).
C1+
V+
Positive terminal of the voltage doubler charge-pump capacitor.
Regulated +5.5V output generated by the charge pump.
Negative terminal of the voltage doubler charge-pump capacitor.
Positive terminal of the inverting charge-pump capacitor.
Negative terminal of the inverting charge-pump capacitor.
Regulated -5.5V output generated by the charge pump.
RS-232 receiver input.
2
3
28
27
24
1
28
26
22
29
31
32
2
C1-
4
C2+
5
C2-
6
2
V-
7
3
R1IN
16
9
4
R2IN
RS-232 receiver input.
5
3
R3IN
RS-232 receiver input.
-
6
4
R4IN
RS-232 receiver input.
-
7
5
R5IN
RS-232 receiver input.
-
8
6
R1OUT
R2OUT
R2OUT
R3OUT
R4OUT
R5OUT
STATUS
T1IN
TTL/CMOS receiver output.
15
10
-
19
18
20
17
16
15
21
14
13
12
23
17
16
18
15
14
13
19
12
11
10
21
TTL/CMOS receiver output.
Non-inverting receiver-2 output, active in shutdown.
TTL/CMOS receiver output.
-
TTL/CMOS receiver output.
-
TTL/CMOS receiver output.
-
TTL/CMOS Output indicating online and shutdown status.
TTL/CMOS driver input.
11
13
12
-
T2IN
TTL/CMOS driver input.
T3IN
TTL/CMOS driver input.
ONLINE
Apply logic HIGH to override Auto-Online circuitry keeping
drivers active (SHUTDOWN must also be logic HIGH,
refer to Table 2).
14
T1OUT
T2OUT
T3OUT
GND
RS-232 driver output.
RS-232 driver output.
RS-232 driver output.
Ground.
17
8
9
7
8
10
11
25
26
22
-
9
18
19
20
23
25
20
VCC
+3.0V to +5.5V supply voltage.
SHUTDOWN Apply logic LOW to shut down drivers and charge pump.
This overrides all AUTO ON-LINE® circuitry and ONLINE
(refer to Table 2).
NC
No Connection
-
-
1,24,27,30
Table 1. Device Pin Description
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
6
1
2
3
4
5
6
7
28
27
26
C2+
C2-
C1+
V+
EN
20
1
2
3
4
5
6
SHUTDOWN
V
CC
V-
VCC
19
C1+
V+
25 GND
R1IN
R2IN
R3IN
GND
18
24
C1-
C1-
T1OUT
R1IN
17
SP3223U 16
15
SP3243U
23
ONLINE
C2+
C2-
V-
22
21
20
19
R4IN
R1OUT
SHUTDOWN
STATUS
R2OUT
8
9
7
14
13
R5IN
T1OUT
T2OUT
T3OUT
ONLINE
T1IN
T2OUT
R2IN
8
9
10
11
R1OUT
12 T2IN
18 R2OUT
10
R2OUT
STATUS
11
17
T3IN 12
R3OUT
13
14
16
T2IN
T1IN
R4OUT
15
R5OUT
Figure 11. SP3223U Pinout Configuration
Figure 12. SP3243U Pinout Configuration
1
2
3
4
5
6
7
8
24
NC
NC
GND
C1-
ONLINE
SHUTDOWN
STATUS
23
R IN
1
®
®
22
21
20
19
18
17
R IN
2
R IN
3
R IN
4
R IN
SP3243U
5
T OUT
T OUT
R OUT
1
2
R OUT
1
2
Figure 13. SP3243U QFN Pinout Configuration
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
7
+3.3V to +5V
+
+
19
CC
0.1µF
0.1µF
C5
C1
V
2
3
7
C1+
V+
V-
+
+
0.1µF
0.1µF
C3
C4
4
5
C1-
C2+
SP3223U
+
C2
0.1µF
6
13
12
C2-
T1OUT
T2OUT
T1IN
17
8
RS-232
OUTPUTS
TTL/CMOS
INPUTS
T2IN
R1OUT
R1IN
15
10
16
9
5KΩ
RS-232
INPUTS
TTL/CMOS
OUTPUTS
R OUT
R2IN
2
5KΩ
1
EN
V
CC
20
SHUTDOWN
14
11
ONLINE
STATUS
To µP Supervisor
Circuit
GND
18
Figure 14. SP3223U Typical Operating Circuit
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
8
VCC
+
+
26
CC
0.1
µ
F
C5
C1
V
28
27
3
C1+
V+
V-
+
+
0.1µ
F
C3
C4
0.1µF
24
1
C1-
C2+
SP3243U
+
0.1µF
C2
0.1µ
F
2
14
13
C2-
T1IN
T1OUT
T2OUT
T3OUT
9
T IN
10
11
RS-232
OUTPUTS
2
TTL/CMOS
INPUTS
T3IN
12
R2OUT
20
19
R1IN
R2IN
R OUT
4
5
1
5KΩ
R OUT
18
17
16
15
2
5KΩ
TTL/CMOS
OUTPUTS
R3IN
R4IN
R5IN
R3OUT
R4OUT
R5OUT
6
7
8
RS-232
INPUTS
5KΩ
5KΩ
5KΩ
V
CC
22
23
SHUTDOWN
ONLINE
To µP Supervisor
Circuit
21
STATUS
GND
25
Figure 15. SP3243U Typical Operating Circuit
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
9
DESCRIPTION
The SP3223U and SP3243U series is an ideal
choiceforpowersensitivedesigns.TheSP3223U
andSP3243UdevicesfeatureAUTOON-LINE®
circuitry which reduces the power supply drain
to a 1µA supply current. In many portable or
hand-held applications, an RS-232 cable can be
disconnected or a connected peripheral can be
turned off. Under these conditions, the internal
charge pump and the drivers will be shut down.
Otherwise, the system automatically comes
online. This feature allows design engineers to
The SP3223U and SP3243U transceivers
meet the EIA/TIA-232 and ITU-T V.28/V.24
communication protocols and can be
implemented in battery-powered, portable, or
hand-held applications such as notebook or
palmtopcomputers.TheSP3223UandSP3243U
devices feature Sipex's proprietary and patented
(U.S.-- 5,306,954) on-board charge pump cir-
cuitry that generates ±5.5V RS-232 voltage lev-
els from a single +3.0V to +5.5V power supply.
TheSP3223UandSP3243Udevicescanoperate
at a data rate of 1000kbps fully loaded.
address
power
saving
concerns
without major design changes.
The SP3223U is a 2-driver/2-receiver device,
and the SP3243U is a 3-driver/5-receiver device,
ideal for portable or hand-held applications. The
SP3243U includes one complementary
always-active receiver that can monitor an
external device (such as a modem) in shutdown.
This aids in protecting the UART or serial
controller IC by preventing forward biasing
of the protection diodes where VCC may be
disconnected.
THEORY OF OPERATION
The SP3223U and SP3243U series is made up of
four basic circuit blocks:
1. Drivers
2. Receivers
3. the Sipex proprietary charge pump, and
4. AUTO ON-LINE® circuitry.
Drivers
The drivers are inverting level transmitters that
convert TTL or CMOS logic levels to 5.0V EIA/
TIA-232 levels with an inverted sense relative to
the input logic levels. Typically, the RS-232
output voltage swing is +5.4V with no load and
+5V minimum fully loaded. The driver outputs
are protected against infinite short-circuits to
ground without degradation in reliability. These
drivers comply with the EIA-TIA-232-F and all
previous RS-232 versions. Unused drivers in-
puts should be connected to GND or VCC.
VCC
+
+
26
CC
0.1µF
0.1µF
C5
C1
V
28
27
3
C1+
V+
V-
+
+
C3
C4
0.1µF
0.1µF
24
1
C1-
C2+
SP3243U
+
C2
0.1µF
2
14
13
C2-
T1IN
T1OUT
T2OUT
9
TxD
RTS
DTR
T
2IN
10
11
RS-232
OUTPUTS
T
3OUT
T3IN
12
R2OUT
20
19
UART
or
Serial µC
R1IN
R1OUT
4
5
RxD
CTS
5KΩ
R2IN
R2OUT
18
17
16
15
The drivers have a minimum data rate of
1000kbps fully loaded with 3kΩ in parallel with
250pF, ensuring compatibility with PC-to-PC
communication software.
5KΩ
R3IN
R
3OUT
4OUT
DSR
DCD
RI
6
7
8
RS-232
INPUTS
5KΩ
5KΩ
5KΩ
R
R
4IN
5IN
R5OUT
R
VCC
22
23
SHUTDOWN
ONLINE
21
STATUS
GND
25
µP
Supervisor
IC
V
IN
RESET
Figure 16. Interface Circuitry Controlled by Micropro-
cessor Supervisory Circuit
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
10
+3V to +5V
DEVICE: SP3223U
+
+
0.1µF
0.1µF
C5
C1
V
CC
SHUTDOWN
EN
TXOUT
High Z
High Z
Active
Active
RXOUT
Active
High Z
Active
High Z
C1+
V+
V-
+
+
C3
C4
0.1µF
0.1µF
C1-
C2+
SP3223U
SP3243U
0
0
1
0
1
+
C2
0.1µF
C2-
0
T
1OUT
T1IN
TTL/CMOS
INPUTS
TXIN
TXOUT
1
R1OUT
R1IN
1
TTL/CMOS
OUTPUTS
5kΩ
RXOUT
RXIN
DEVICE: SP3243U
5kΩ
1000pF
1000pF
EN *
V
CC
SHUTDOWN
SHUTDOWN
TXOUT
High Z
Active
RXOUT
High Z
Active
R2OUT
Active
Active
ONLINE
STATUS
To µP Supervisor
Circuit
0
1
GND
*
SP3223EU Only
Figure 17. Loopback Test Circuit for RS-232 Driver
Data Transmission Rates
Table 2. SHUTDOWN and EN Truth Tables
Note: In AUTO ON-LINE® Mode where ONLINE =
GND and SHUTDOWN = VCC, the device will shut down
if there is no activity present at the Receiver inputs.
Figure 17 shows a loopback test circuit used to
test the RS-232 Drivers. Figure18 shows the test
resultswhereonedriverwasactiveat1Mbpsand
all three drivers loaded with an RS-232 receiver
in parallel with a 250pF capacitor. Figure 19
showsthetestresultsoftheloopbackcircuitwith
all drivers active at 250kbps with typical
RS-232 loads in parallel with 1000pF capacitors. A
superiorRS-232datatransmissionrateof1Mbps
makestheSP3223U/3243Useriesanidealmatch
for high speed LAN and personal computer
peripheral applications.
Receivers
The receivers convert +5.0V EIA/TIA-232
levels to TTL or CMOS logic output levels. The
SP3223U receivers have an inverting output that
can be disabled by using the EN pin.
Figure 18. Loopback Test results at 1Mbps
Figure 19. Loopback Test results at 250Kbps
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
11
ReceiversareactivewhentheAUTOON-LINE®
circuitry is enabled or when in shutdown.
Duringtheshutdown, thereceiverswillcontinue
to be active. If there is no activity present at the
receivers for a period longer than 100µs or when
SHUTDOWN is enabled, the device goes into a
standby mode where the circuit draws 1µA.
DrivingENtoalogicHIGHforcestheoutputsof
the receivers into high-impedance. The truth
table logic of the SP3223U and SP3243U driver
and receiver outputs can be found in Table 2.
The charge pump operates in a discontinuous
mode using an internal oscillator. If the output
voltages are less than a magnitude of 5.5V, the
charge pump is enabled. If the output voltages
exceed a magnitude of 5.5V, the charge pump is
disabled. Thisoscillatorcontrolsthefourphases
of the voltage shifting. A description of each
phase follows.
Phase 1
— VSS charge storage — During this phase of
the clock cycle, the positive side of capacitors
C1 and C2 are initially charged to VCC. Cl+ is
then switched to GND and the charge in C1– is
The SP3243U includes an additional non-in-
verting receiver with an output R2OUT. R2OUT
is an extra output that remains active and
monitors activity while the other receiver
outputs are forced into high impedance.
This allows Ring Indicator (RI) from a
peripheral to be monitored without forward
biasing the TTL/CMOS inputs of the other
devices connected to the receiver outputs.
–
+
transferred to C2 . Since C2 is connected to
VCC, the voltage potential across capacitor C2 is
now 2 times VCC
.
Phase 2
— VSS transfer — Phase two of the clock
connects the negative terminal of C2 to the VSS
storage capacitor and the positive terminal of C2
to GND. This transfers a negative generated
voltage to C3. This generated voltage is
regulated to a minimum voltage of -5.5V.
Simultaneous with the transfer of the voltage to
C3, the positive side of capacitor C1 is switched
to VCC and the negative side is connected to
GND.
Since receiver input is usually from a transmis-
sion line where long cable lengths and system
interference can degrade the signal, the inputs
haveatypicalhysteresismarginof300mV. This
ensures that the receiver is virtually immune to
noisy transmission lines. Should an input be left
unconnected, aninternal 5KΩpulldownresistor
to ground will commit the output of the receiver
to a HIGH state.
Phase 3
— VDD charge storage — The third phase of the
clock is identical to the first phase — the charge
transferred in C1 produces –VCC in the negative
terminal of C1, which is applied to the negative
Charge Pump
+
side of capacitor C2. Since C2 is at VCC, the
voltage potential across C2 is 2 times VCC
.
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 5.5V
power supplies. The internal power supply
consists of a regulated dual charge pump that
provides output voltages 5.5V regardless of the
input voltage (VCC) over the +3.0V to +5.5V
range. This is important to maintain compliant
RS-232 levels regardless of power supply
fluctuations.
Phase 4
— VDD transfer — The fourth phase of the clock
connects the negative terminal of C2 to GND,
and transfers this positive generated voltage
across C2 to C4, the VDD storage capacitor. This
voltage is regulated to +5.5V. At this voltage,
the internal oscillator is disabled. Simultaneous
with the transfer of the voltage to C4, the
positive side of capacitor C1 is switched to VCC
and the negative side is connected to GND,
allowing the charge pump cycle to begin again.
The charge pump cycle will continue as long as
the operational conditions for the internal
oscillator are present.
Since both V+ and V– are separately generated
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
12
from VCC, in a no–load condition V+ and V– will
besymmetrical. Olderchargepumpapproaches
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.
The clock rate for the charge pump typically
operatesat250kHz. Theexternalcapacitorscan
be as low as 0.1µF with a 16V breakdown
voltage rating.
S
H
U
T
+2.7V
0V
-2.7V
RECEIVER
RS-232 INPUT
VOLTAGES
D
O
W
N
V
CC
STATUS
0V
t
STSL
t
STSH
t
ONLINE
+5V
DRIVER
RS-232 OUTPUT
VOLTAGES
0V
-5V
Figure 20. AUTO ON-LINE® Timing Waveforms
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
13
V
= +5V
CC
C
+5V
4
+
–
+
V
V
Storage Capacitor
Storage Capacitor
DD
SS
+
–
+
–
C
C
2
1
–
C
–5V
–5V
3
Figure 21. Charge Pump — Phase 1
V
= +5V
CC
C
4
+
–
3
V
Storage Capacitor
Storage Capacitor
DD
SS
+
+
C
C
2
1
–
–
+
–
V
C
–10V
Figure 22. Charge Pump — Phase 2
[
T
]
+6V
a) C2+
T
T
0V
0V
1
2
2
b) C2-
-6V
Ch1 2.00V Ch2 2.00V M 1.00µs Ch1 1.96V
Figure 23. Charge Pump Waveforms
V
= +5V
CC
C
+5V
4
+
–
+
V
V
Storage Capacitor
Storage Capacitor
DD
SS
+
–
+
–
C
C
2
1
–
C
–5V
–5V
3
Figure 24. Charge Pump — Phase 3
V
= +5V
CC
C
+10V
4
+
–
+
V
Storage Capacitor
Storage Capacitor
DD
+
–
+
–
C
C
2
1
–
V
SS
C
3
Figure 25. Charge Pump — Phase 4
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
14
6
4
Vout+
Vout-
2
0
-2
-4
-6
Load Current Per Transmitter [mA]
Figure 26. SP3243U Driver Output Voltages vs. Load
Current per Transmitter
V
CC
+
26
CC
0.1µF
0.1µF
C5
C1
V
28
27
3
C1+
V+
+
+
+
+
C3
C4
0.1µF
0.1µF
24
1
C1-
SP3243U
C2+
V-
C2
0.1µF
2
14
13
C2-
T1IN
T1OUT
T2OUT
T3OUT
9
T IN
2
10
11
T3IN
12
R2OUT
20
19
R1IN
R2IN
R3IN
R4IN
R5IN
R OUT
1
4
5
5KΩ
R2OUT
R3OUT
R4OUT
R5OUT
18
17
16
15
5KΩ
6
7
8
5KΩ
5KΩ
5KΩ
DB-9
Connector
VCC
22
23
SHUTDOWN
ONLINE
1
2
3
4
5
6
To µP Supervisor
21
STATUS
Circuit
GND
25
7
8
9
DB-9 Connector Pins:
1. Received Line Signal Detector
2. Received Data
6. DCE Ready
7. Request to Send
8. Clear to Send
9. Ring Indicator
3. Transmitted Data
4. Data Terminal Ready
5. Signal Ground (Common)
Figure 27. Circuit for the connectivity of the SP3243U with a DB-9 connector
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
15
RS-232 SIGNAL
AT RECEIVER
INPUT
SHUTDOWN
INPUT
TRANSCEIVER
STATUS
ONLINE INPUT
STATUS OUTPUT
Normal Operation
LOW
YES
NO
HIGH
HIGH
HIGH
LOW
(Auto-Online)
Normal Operation
HIGH
LOW
Shutdown
(Auto-Online)
NO
HIGH
LOW
HIGH / LOW
Shutdown
Shutdown
YES
NO
LOW
LOW
HIGH
LOW
HIGH / LOW
Table 3. AUTO ON-LINE® Logic
R INACT
X
Inactive Detection Block
RS-232
Receiver Block
R OUT
X
R IN
X
Figure 28. Stage I of AUTO ON-LINE® Circuitry
Delay
Stage
Delay
Stage
Delay
Stage
Delay
Stage
Delay
Stage
STATUS
R1INACT
R4INACT
R5INACT
R2INACT
R3INACT
SHUTDOWN
Figure 29. Stage II of AUTO ON-LINE® Circuitry
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
16
The second stage of the AUTO ON-LINE® cir-
cuitry, shown in Figure 29, processes all the
receiver's RXINACT signals with an accumu-
lated delay that disables the device to a 1µA
supply current.
AUTO ON-LINE® Circuitry
The SP3223U and SP3243U devices have a
patent pending AUTO ON-LINE® circuitry on
board that saves power in applications such as
laptop computers, palmtop (PDA) computers
and other portable systems.
The STATUS pin goes to a logic LOW when the
cable is disconnected, the external transmitters
are disabled, or the SHUTDOWN pin is
invoked. The typical accumulated delay is
around 20µs.
The SP3223U and SP3243U devices
incorporate an AUTO ON-LINE® circuit that
automatically enables itself when the external
transmitters are enabled and the cable is
connected. Conversely, the AUTO ON-LINE®
circuitalsodisablesmostoftheinternalcircuitry
when the device is not being used and goes into
astandbymodewherethedevicetypicallydraws
1mA. This function can also be externally
controlled by the ONLINE pin. When this pin is
tied to a logic LOW, the AUTO ON-LINE®
function is active. Once active, the device is
enabled until there is no activity on the receiver
inputs. The receiver input typically sees at least
+3V, which are generated from the transmitters
at the other end of the cable with a +5V
minimum. When the external transmitters are
disabled or the cable is disconnected, the
receiver inputs will be pulled down by their
internal 5kΩ resistors to ground. When this
occurs over a period of time, the internal
transmitters will be disabled and the device goes
intoashutdownorstandymode. WhenONLINE
is HIGH, the AUTO ON-LINE® mode is dis-
abled.
When the SP3223U and SP3243U drivers or
internal charge pump are disabled, the supply
current is reduced to 1µA. This can commonly
occurinhand-heldorportableapplicationswhere
the RS-232 cable is disconnected or the RS-232
drivers of the connected peripheral are turned off.
The AUTO ON-LINE® mode can be disabled by
theSHUTDOWNpin. IfthispinisalogicLOW,
the AUTO ON-LINE® function will not operate
regardless of the logic state of the ONLINE pin.
Table 3 summarizes the logic of the AUTO ON-
LINE® operating modes. The truth table logic of
the SP3223U and SP3243U driver and receiver
outputs can be found in Table 2.
The STATUS pin outputs a logic LOW signal
if the device is shutdown. This pin goes to a
logic HIGH when the external transmitters are
enabled and the cable is connected.
When the SP3223U and SP3243U devices
are shut down, the charge pumps are turned off.
V+ charge pump output decays to VCC, the
V- output decays to GND. The decay time will
depend on the size of capacitors used for the
charge pump. Once in shutdown, the time
required to exit the shut down state and have
valid V+ and V- levels is typically 200µs.
The AUTO ON-LINE® circuit has two stages:
1) Inactive Detection
2) Accumulated Delay
The first stage, shown in Figure 28, detects an
inactive input. A logic HIGH is asserted on
RXINACT if the cable is disconnected or the
external transmitters are disabled. Otherwise,
RXINACT will be at a logic LOW. This circuit
is duplicated for each of the other receivers.
For easy programming, the STATUS can be
used to indicate DTR or a Ring Indicator signal.
Tying ONLINE and SHUTDOWN together
will bypass the AUTO ON-LINE® circuitry so
this connection acts like a shutdown input pin.
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
17
ESD TOLERANCE
The SP3223U/3243U series incorporates
ruggedized ESD cells on all driver output and
receiver input pins. The ESD structure is
improved over our previous family for more
rugged applications and environments sensitive
to electro-static discharges and associated
transients.
The Human Body Model has been the generally
accepted ESD testing method for semi-
conductors. This method is also specified in
MIL-STD-883, Method 3015.7 for ESD testing.
The premise of this ESD test is to simulate the
human body’s potential to store electro-static
energy and discharge it to an integrated circuit.
The simulation is performed by using a test
model as shown in Figure 30. This method will
test the IC’s capability to withstand an ESD
transient during normal handling such as in
manufacturing areas where the ICs tend to be
handled frequently.
FortheHumanBodyModel, thecurrentlimiting
resistor (R ) and the source capacitor (CS) are
1.5kΩ andS100pF, respectively.
R
R
S
S
R
R
C
C
SW2
SW2
SW1
SW1
Device
Under
Test
DC Power
Source
C
C
S
S
Figure 30. ESD Test Circuit for Human Body Model
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
18
PACKAGE: PLASTIC
DUAL–IN–LINE
(NARROW)
E1
E
D1 = 0.005" min.
(0.127 min.)
A1 = 0.015" min.
(0.381min.)
D
A = 0.210" max.
(5.334 max).
C
A2
Ø
L
B1
B
e = 0.300 BSC
e = 0.100 BSC
(2.540 BSC)
A
(7.620 BSC)
ALTERNATE
END PINS
(BOTH ENDS)
DIMENSIONS (Inches)
Minimum/Maximum
(mm)
28–PIN
16–PIN
20–PIN
0.115/0.195
(2.921/4.953)
0.115/0.195
(2.921/4.953)
0.115/0.195
(2.921/4.953)
A2
0.014/0.022
(0.356/0.559)
0.014/0.022
(0.356/0.559)
0.014/0.022
(0.356/0.559)
B
0.045/0.070
0.045/0.070
0.045/0.070
B1
C
(1.143/1.778)
(1.143/1.778)
(1.143/1.778)
0.008/0.014
(0.203/0.356)
0.008/0.014
(0.203/0.356)
0.008/0.014
(0.203/0.356)
1.385/1.454
(35.17/36.90)
0.780/0.800
0.980/1.060
D
(19.812/20.320) (24.892/26.924)
0.300/0.325
(7.620/8.255)
0.300/0.325
(7.620/8.255)
0.300/0.325
(7.620/8.255)
E
0.240/0.280
0.240/0.280
0.240/0.280
E1
L
(6.096/7.112)
(6.096/7.112)
(6.096/7.112)
0.115/0.150
(2.921/3.810)
0.115/0.150
(2.921/3.810)
0.115/0.150
(2.921/3.810)
0°/ 15°
(0°/15°)
0°/ 15°
(0°/15°)
0°/ 15°
(0°/15°)
Ø
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
19
PACKAGE: PLASTIC SHRINK
SMALL OUTLINE
(SSOP)
E
H
D
A
Ø
A1
L
e
B
DIMENSIONS (Inches)
Minimum/Maximum
(mm)
16–PIN
24–PIN
20–PIN
28–PIN
0.068/0.078
(1.73/1.99)
0.068/0.078
(1.73/1.99)
A
A1
B
D
E
0.068/0.078
(1.73/1.99)
0.068/0.078
(1.73/1.99)
0.002/0.008
(0.05/0.21)
0.002/0.008
(0.05/0.21)
0.002/0.008
(0.05/0.21)
0.002/0.008
(0.05/0.21)
0.010/0.015
(0.25/0.38)
0.010/0.015
(0.25/0.38)
0.010/0.015
(0.25/0.38)
0.010/0.015
(0.25/0.38)
0.239/0.249
(6.07/6.33)
0.317/0.328
(8.07/8.33)
0.278/0.289
(7.07/7.33)
0.397/0.407
(10.07/10.33)
0.205/0.212
(5.20/5.38)
0.205/0.212
(5.20/5.38)
0.205/0.212
(5.20/5.38)
0.205/0.212
(5.20/5.38)
0.0256 BSC
(0.65 BSC)
0.0256 BSC
(0.65 BSC)
e
0.0256 BSC
(0.65 BSC)
0.0256 BSC
(0.65 BSC)
0.301/0.311
(7.65/7.90)
0.301/0.311
(7.65/7.90)
H
L
0.301/0.311
(7.65/7.90)
0.301/0.311
(7.65/7.90)
0.022/0.037
(0.55/0.95)
0.022/0.037
(0.55/0.95)
0.022/0.037
(0.55/0.95)
0.022/0.037
(0.55/0.95)
0°/8°
(0°/8°)
0°/8°
(0°/8°)
Ø
0°/8°
(0°/8°)
0°/8°
(0°/8°)
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
20
PACKAGE: PLASTIC
SMALL OUTLINE (SOIC)
(WIDE)
E
H
D
A
Ø
A1
L
e
B
DIMENSIONS (Inches)
Minimum/Maximum
(mm)
28–PIN
A
A1
B
D
E
0.090/0.104
(2.29/2.649)
0.004/0.012
(0.102/0.300)
0.013/0.020
(0.330/0.508)
0.697/0.713
(17.70/18.09)
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°)
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
21
PACKAGE: PLASTIC THIN
SMALL OUTLINE
(TSSOP)
DIMENSIONS
in inches (mm) Minimum/Maximum
Symbol
20 Lead
28 Lead
D
0.252/0.260 0.378/0.386
(6.40/6.60) (9.60/9.80)
e
0.026 BSC 0.026 BSC
(0.65 BSC) (0.65 BSC)
e
0.126 BSC (3.2 BSC)
0.252 BSC (6.4 BSC)
1.0 OIA
0.169 (4.30)
0.177 (4.50)
0.039 (1.0)
0’-8’ 12’REF
e/2
0.039 (1.0)
0.043 (1.10) Max
D
0.033 (0.85)
0.037 (0.95)
0.007 (0.19)
0.012 (0.30)
0.002 (0.05)
0.006 (0.15)
(θ2)
0.008 (0.20)
0.004 (0.09) Min
0.004 (0.09) Min
Gage
Plane
(θ3)
0.020 (0.50)
0.026 (0.75)
(θ1)
0.010 (0.25)
1.0 REF
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
22
PACKAGE: 32 PIN QFN
D
E
4X
Ø
º
A2
A3
A
SEATING PLANE
A1
D2
NX K
NX L
32 PIN QFN
JEDECMO220
(VHHD-4)
Dimensions in
(mm)
MIN NOM MAX
0.80 0.90 1.00
A
A1
A2
0
0.02 0.05
0.65 1.00
0.20 REF
5.00 BSC
0
E2
A3
D
E
e
5.00 BSC
0.50 BSC
NX K
b
0.18
0º
0.25 0.30
Ø
-
14º
e
NX b
3.50
3.65 3.80
D2
E2
L
3.50 3.65 3.80
0.35 0.40 0.45
K
0.20
-
32
8
-
N
ND
NE
8
32 PIN QFN
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
23
ORDERING INFORMATION
Part Number
Temperature Range
Package Types
SP3223UCP ...................................................... 0°C to +70°C...................................................... 20-pin PDIP
SP3223UCA ...................................................... 0°C to +70°C.................................................... 20-pin SSOP
SP3223UCA/TR ................................................ 0°C to +70°C.................................................... 20-pin SSOP
SP3223UCY ...................................................... 0°C to +70°C.................................................. 20-pin TSSOP
SP3223UCY/TR ................................................ 0°C to +70°C.................................................. 20-pin TSSOP
SP3243UCT ...................................................... 0°C to +70°C.................................................. 28-pin WSOIC
SP3243UCT/TR ................................................ 0°C to +70°C.................................................. 28-pin WSOIC
SP3243UCA ...................................................... 0°C to +70°C.................................................... 28-pin SSOP
SP3243UCA/TR ................................................ 0°C to +70°C.................................................... 28-pin SSOP
SP3243UCY ...................................................... 0°C to +70°C.................................................. 28-pin TSSOP
SP3243UCY/TR ................................................ 0°C to +70°C.................................................. 28-pin TSSOP
SP3243UCR ...................................................... 0°C to +70°C....................................................... 32-pin QFN
SP3243UCR/TR ................................................ 0°C to +70°C....................................................... 32-pin QFN
SP3223UEP .................................................... -40°C to +85°C .................................................... 20-pin PDIP
SP3223UEA .................................................... -40°C to +85°C .................................................. 20-pin SSOP
SP3223UEA/TR .............................................. -40°C to +85°C .................................................. 20-pin SSOP
SP3223UEY .................................................... -40°C to +85°C ................................................ 20-pin TSSOP
SP3223UEY/TR .............................................. -40°C to +85°C ................................................ 20-pin TSSOP
SP3243UET..................................................... -40°C to +85°C ................................................ 28-pin WSOIC
SP3243UET/TR............................................... -40°C to +85°C ................................................ 28-pin WSOIC
SP3243UEA .................................................... -40°C to +85°C .................................................. 28-pin SSOP
SP3243UEA/TR .............................................. -40°C to +85°C .................................................. 28-pin SSOP
SP3243UEY .................................................... -40°C to +85°C ................................................ 28-pin TSSOP
SP3243UEY/TR .............................................. -40°C to +85°C ................................................ 28-pin TSSOP
SP3243UER .................................................... -40°C to +85°C ..................................................... 32-pin QFN
SP3243UER/TR .............................................. -40°C to +85°C ..................................................... 32-pin QFN
Available in lead free packaging. To order add "-L" suffix to part number.
Example: SP3243UER/TR = standard; SP3243UER-L/TR = lead free
/TR = Tape and Reel
Pack quantity is 1,500 for SSOP, TSSOP and WSOIC.
REVISION HISTORY
DATE
REVISION
DESCRIPTION
5/25/04
A
Replaced MLPQ package with QFN.
Corporation
ANALOGEXCELLENCE
Sipex Corporation
Headquarters and
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 herein; neither does it convey any license under its patent rights nor the rights of others.
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
24
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