1
Rev. A Date:12/11/03 SP3222EU/3232EU 3.3V, 1000Kbps RS-232 Transceivers © Copyright 2003 Sipex Corporation
3.3V, 1000 Kbps RS-232 Transceiver s
SP3222EU/3232EU
DESCRIPTION
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
1µA Low-Power Shutdown with Receivers
Active (SP3222EU)
Enhanced ESD Specifications:
±15kV Human Body Model
±15kV IEC1000-4-2 Air Discharge
±8kV IEC1000-4-2 Contact Discharge
1000 kbps Minimum Transmission Rate
Ideal for Handheld, Battery Operated
Applications
SELECTION TABLE
®
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UE2323PS V5.5+otV0.3+224oNoN61
The SP3222EU and the SP3232EU are 2 driver, 2 receiver RS-232 transceiver solutions
intended for portable or hand-held applications such as notebook or palmtop computers.
Their data transmission rate of 1000 kbps meets the demands of high speed RS-232
applications. Both ICs have a high-efficiency, charge-pump power supply that requires
only 0.1µF capacitors in 3.3V operation. This charge pump allows the SP3222EU and the
3232EU to deliver true RS-232 performance from a single power supply ranging from
+3.0V to +5.5V. The ESD tolerance of the SP3222EU/3232EU devices are over ±15kV
for both Human Body Model and IEC1000-4-2 Air discharge test methods.
The SP3222EU device has a low-power shutdown mode where the devices' driver
outputs and charge pumps are disabled. During shutdown, the supply current falls to less
than 1uA.
Rev. A Date:12/11/03 SP3222EU/3232EU 3.3V, 1000kbps RS-232 Transceivers © Copyright 2003 Sipex Corporation
2
NOTE 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.
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.
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, EN ............................................ -0.3V to +6.0V
RxIN .................................................................. ±25V
Output Voltages
TxOUT.......................................................±13.2V
RxOUT............. ..................-0.3V to (VCC + 0.3V)
Short-Circuit Duration
TxOUT.................................................Continuous
Storage Temperature.................-65°C to +150°C
Power Dissipation Per Package
20-pin SSOP (derate 9.25mW/oC above +70oC)........750mW
18-pin PDIP (derate 15.2mW/oC above +70oC) .......1220mW
18-pin SOIC (derate 15.7mW/oC above +70oC) ....... 1260mW
20-pin TSSOP (derate 11.1mW/oC above +70oC)...... 890mW
16-pin SSOP (derate 9.69mW/oC above +70oC)........775mW
16-pin PDIP (derate 14.3mW/oC above +70oC) .......1150mW
16-pin Wide SOIC (derate 11.2mW/oC above +70oC) .... 900mW
16-pin TSSOP (derate 10.5mW/oC above +70oC)...... 850mW
16-pin nSOIC (derate 13.57mW/°C above +70°C) ...... 1086mW
SPECIFICATIONS
Unless otherwise noted, the following specifications apply for VCC = +3.0V to +5.5V with TAMB = TMIN to TMAX, C1 to
C4=0.1µF
PARAMETER MIN. TYP. MAX. UNITS CONDITIONS
DC CHARACTERISTICS
Supply Current 0.3 1.0 mA no load, TAMB = +25°C, VCC = 3.3V,
TxIN = GND or VCC
Shutdown Supply Current 1.0 10 µASHDN = GND,TAMB = +25°C,
VCC= +3.3V, TxIN = GND or VCC
LOGIC INPUTS AND RECEIVER OUTPUTS
Input Logic Threshold LOW GND 0.8 V TxIN, EN, SHDN, Note 2
Input Logic Threshold HIGH 2.0 V VCC = 3.3V, Note2
2.4 VCC VCC = 5.0V, Note 2
Input Leakage Current ±0.01 ±1.0 µATxIN, EN, SHDN, TAMB = +25°C,
VIN= 0V to VCC
Output Leakage Current ±0.05 ±10 µAreceivers disabled, VOUT = 0V to VCC
Output Voltage LOW 0.4 V IOUT = 1.6mA
Output Voltage HIGH VCC-0.6 VCC-0.1 V IOUT = -1.0mA
DRIVER OUTPUTS
Output Voltage Swing ±5.0 ±5.4 V 3k load to ground at all driver
outputs,TAMB = +25°C
Output Resistance 300 VCC = V+ = V- = 0V, TOUT = +2V
Output Short-Circuit Current ±35 ±60 mA VOUT = 0V
Output Leakage Current ±25 µAV
OUT = +12V,VCC= 0V to 5.5V,drivers
disabled
3
Rev. A Date:12/11/03 SP3222EU/3232EU 3.3V, 1000Kbps RS-232 Transceivers © Copyright 2003 Sipex Corporation
SPECIFICATIONS (continued)
Unless otherwise noted, the following specifications apply for VCC = +3.0V to +5.5V with TAMB = TMIN to TMAX , C1 to
C4=0.1µF. Typical Values apply at VCC = +3.3V or +5.5V and TAMB = 25oC.
NOTE 2: Driver input hysteresis is typically 250mV.
PARAMETER MIN. TYP. MAX. UNITS CONDITIONS
RECEIVER INPUTS
Input Voltage Range -25 +25 V
Input Threshold LOW 0.6 1.2 V VCC=3.3V
0.8 1.5 V VCC=5.0V
Input Threshold HIGH 1.5 2.4 V VCC=3.3V
1.8 2.4 V VCC=5.0V
Input Hysteresis 0.3 V
Input Resistance 3 5 7 k
TIMING CHARACTERISTICS
Maximum Data Rate 1000 kbps RL=3k, CL=250pF, one driver
switching
Receiver Propagation Delay 0.15 µst
PHL, RxIN to RxOUT, CL=150pF
0.15 tPLH, RxIN to RxOUT, CL=150pF
Receiver Output Enable Time 200 ns
Receiver Output Disable Time 200 ns
Driver Skew 100 ns | tPHL - tPLH |, TAMB = 25°C
Receiver Skew 50 ns | tPHL - tPLH |
Transition-Region Slew Rate 90 V/µsV
CC = 3.3V, RL = 3K, TAMB = 25°C,
measurements taken from -3.0V to
+3.0V or +3.0V to -3.0V
Rev. A Date:12/11/03 SP3222EU/3232EU 3.3V, 1000kbps RS-232 Transceivers © Copyright 2003 Sipex Corporation
4
Figure 1. Transmitter Output Voltage vs Load
Capacitance for the SP3222EU and the SP3232EU Figure 2. Slew Rate vs Load Capacitance for the
SP3222EU and the SP3232EU
Figure 3. Supply Current vs Load Capacitance when
Transmitting Data for the SP3222EU and the SP3232EU
TYPICAL PERFORMANCE CHARACTERISTICS
Unless otherwise noted, the following performance characteristics apply for VCC = +3.3V, 1000kbps data rates, all drivers
loaded with 3k, 0.1µF charge pump capacitors, and TAMB = +25°C.
0 250 500 1000 1500
Load Capacitance (pF)
Transmitter
Output Voltage (V)
6
4
2
0
-2
-4
-6
T1 at 1Mbps
T2 at 62.5Kbps
0 250 500 1000 1500 2000
Load Capacitance (pF)
Slew Rate (V / µs)
120
100
80
60
40
20
0
T1 at 1Mbps
T2 at 62.5Kbps
All TX loaded 3K // CLoad
0 250 500 1000 1500
Load Capacitance (pF)
Supply Current (mA)
35
30
20
15
10
5
0
T1 at 1Mbps
T2 at 62.5Kbps
2.7 3 3.5 4 4.5 5
Supply Voltage (V)
Supply Current (mA)
20
15
10
5
0
T1 at Mbps
T2 at 62.5Kbps
2.7 3 3.5 4 4.5 5
Supply Voltage (V)
Transmitter Output
Voltage (V)
6
4
2
0
-2
-4
-6
T1 at 1Mbps
T2 at 62.5Kbps
0 250 500 1000 1500 2000
200
150
100
50
0
Load Capacitance (pF)
Skew (nS)
T1 at 500Kbps
T2 at 31.2Kbps
All TX loaded 3K // CLoad
Figure 4. Supply Current vs Supply Voltage for the
SP3222EU and the SP3232EU
Figure 5. Transmitter Output Voltage vs Supply Voltage
for the SP3222EU and the SP3232EU Figure 6. Transmitter Skew vs Load Capacitance for the
SP3222EU and the SP3232EU
5
Rev. A Date:12/11/03 SP3222EU/3232EU 3.3V, 1000Kbps RS-232 Transceivers © Copyright 2003 Sipex Corporation
EMANNOITCNUF
REBMUNNIP
UE2223PS
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TUO1T.tuptuorevird232-SR 517141
TUO2T.tuptuorevird232-SR 88 7
NI1R.tupnireviecer232-SR 416131
NI2R.tupnireviecer232-SR 99 8
TUO1R.tuptuoreveicerSOMC/LTT 315121
TUO2R.tuptuoreveicerSOMC/LTT 01019
NI1T.tupnirevirdSOMC/LTT 213111
NI2T.tupnirevirdSOMC/LTT 112101
DNG.dnuorG 618151
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Table 1. Device Pin Description
Rev. A Date:12/11/03 SP3222EU/3232EU 3.3V, 1000kbps RS-232 Transceivers © Copyright 2003 Sipex Corporation
6
Figure 8. Pinout Configuration for the SP3232EU
Figure 7. Pinout Configurations for the SP3222EU
V-
1
2
3
417
18
19
20
5
6
7
16
15
14
SHDN
C1+
V+
C1-
C2+
C2-
N.C.
EN
R1IN
GND
VCC
T1OUT
N.C.
8
9
10 11
12
13
R2IN
R2OUT
SP3222EU
T2OUT T1IN
T2IN
R1OUT
SSOP/TSSOP
V-
1
2
3
415
16
17
18
5
6
7
14
13
12
SHDN
C1+
V+
C1-
C2+
C2-
EN
R1IN
GND
V
CC
T1OUT
8
910
11
R2IN
SP3222EU
T2OUT T2IN
T1IN
R1OUT
DIP/SO
R2OUT
V-
1
2
3
413
14
15
16
5
6
7
12
11
10
C1+
V+
C1-
C2+
C2-
R1IN
R2IN
GND
VCC
T1OUT
T2IN
89
SP3232EU
T1IN
R1OUT
R2OUT
T2OUT
7
Rev. A Date:12/11/03 SP3222EU/3232EU 3.3V, 1000Kbps RS-232 Transceivers © Copyright 2003 Sipex Corporation
Figure 9. SP3222EU Typical Operating Circuits
Figure 10. SP3232EU Typical Operating Circuit
SP3222EU
2
4
6
5
3
7
19
GND
T1IN
T2IN
T1OUT
T2OUT
C1+
C1-
C2+
C2-
V+
V-
V
CC
13
12
0.1µF
0.1µF
0.1µF
+
C2
C5
C1
+
+*C3
C4
+
+
0.1µF
0.1µF
8
17 RS-232
OUTPUTS
RS-232
INPUTS
LOGIC
INPUTS
V
CC
18
1
5k
R1IN
R1OUT
15
9
5k
R2IN
R2OUT
10
16
LOGIC
OUTPUTS
EN 20
SHDN
*can be returned to
either V
CC
or GND
SSOP
TSSOP
SP3222EU
2
4
6
5
3
7
17
GND
T1IN
T2IN
T1OUT
T2OUT
C1+
C1-
C2+
C2-
V+
V-
V
CC
12
11
0.1µF
0.1µF
0.1µF
+
C2
C5
C1
+
+*C3
C4
+
+
0.1µF
0.1µF
8
15 RS-232
OUTPUTS
RS-232
INPUTS
LOGIC
INPUTS
V
CC
16
1
5k
R1IN
R1OUT
13
9
5k
R2IN
R2OUT
10
14
LOGIC
OUTPUTS
EN 18
SHDN
*can be returned to
either V
CC
or GND
DIP/SO
SP3232EU
1
3
5
4
2
6
16
GND
T1IN
T2IN
T1OUT
T2OUT
C1+
C1-
C2+
C2-
V+
V-
V
CC
11
10
0.1µF
0.1µF
0.1µF
+
C2
C5
C1
+
+*C3
C4
+
+
0.1µF
0.1µF
14
7RS-232
OUTPUTS
RS-232
INPUTS
LOGIC
INPUTS
V
CC
15
5k
R1IN
R1OUT
12 13
5k
R2IN
R2OUT
98
LOGIC
OUTPUTS
*can be returned to
either V
CC
or GND
Rev. A Date:12/11/03 SP3222EU/3232EU 3.3V, 1000kbps RS-232 Transceivers © Copyright 2003 Sipex Corporation
8
DESCRIPTION
The SP3222EU and SP3232EU are 2 driver/
2receiver devices ideal for portable or hand-
held applications. The SP3222EU features a
1µA shutdown mode that reduces power
consumption and extends battery life in
portable systems. Its receivers remain active
in shutdown mode, allowing external devices
such as modems to be monitored using only 1
µA supply current.
The SP3222EU/3232EU transceivers meet the
EIA/TIA-232 and V.28/V.24 communication
protocols They feature Sipex's proprietary on-
board charge pump circuitry that generates 2 x
VCC for RS-232 voltage levels from a single
+3.0V to +5.5V power supply. The
SP3222EU/3232EU drivers operate at a
minimum data rate of 1000kbps.
THEORY OF OPERATION
The SP3222EU/3232EU series are made up of
three basic circuit blocks: 1. Drivers, 2.
Receivers, and 3. the Sipex proprietary
charge pump.
Drivers
The drivers are inverting level transmitters that
convert TTL or CMOS logic levels to ±5.0V
EIA/TIA-232 levels inverted relative to the
input logic levels. Typically, the RS-232
output voltage swing is ±5.5V with no load
and at least ±5V minimum fully loaded. The
driver outputs are protected against infinite
short-circuits to ground without degradation in
reliability. Driver outputs will meet EIA/TIA-
562 levels of ±3.7V with supply voltages as
low as 2.7V.
The drivers have a minimum data rate of
1000kbps fully loaded with 3K in
parallel with 250pF, ensuring compatibility
with PC-to-PC communication software.
Figure 11 shows a loopback test circuit used
to the RS-232 drivers. Figure 12 shows the
test results of the loopback circuit with all
drivers active at 250kbps with RS-232 loads in
parallel with 1000pF capacitors. Figure 13
shows the test results where one driver was
active at 1000kbps and all drivers loaded with
an RS-232 receiver in parallel with a 250pF
capacitor.
The SP3222EU driver's output stages are
tristated in shutdown mode. When the power
is off, the SP3222EU device permits the
outputs to be driven up to ±12V. Because the
driver's inputs do not have pull-up resistors,
unused inputs should be connected to VCC or
GND.
In the shutdown mode, the supply current is
less than 1µA, where SHDN = LOW. When
the SP3222EU device is shut down, the
device's driver outputs are disabled (tri-stated)
and the charge pumps are turned off with V+
pulled down to VCC and V- pulled to GND.
The time required to exit shutdown is typically
100µs. Connect SHDN to VCC if the shutdown
mode is not used.
Receivers
The receivers convert EIA/TIA-232 levels to
TTL or CMOS logic output levels. The
SP3222EU receivers have an inverting tri-state
output. Receiver outputs (RxOUT) are tri-
stated when the enable control EN = HIGH.
In the shutdown mode, the receivers can be
active or inactive. EN has no effect on
TxOUT. The truth table logic of the
SP3222EU driver and receiver outputs can be
found in Table 2.
9
Rev. A Date:12/11/03 SP3222EU/3232EU 3.3V, 1000Kbps RS-232 Transceivers © Copyright 2003 Sipex Corporation
Figure 12. Driver Loopback Test All Drivers at 250kbps Figure 13. Driver Loopback Test One Driver 1Mbps
Figure 11. SP3222EU/3232EU Driver Loopback Test Circuit
SP3222EU
SP3232EU
GND
TxIN TxOUT
C1+
C1-
C2+
C2-
V+
V-
VCC
0.1µF
0.1µF
0.1µF
+
C2
C5
C1
+
+C3
C4
+
+
0.1µF
0.1µF
LOGIC
INPUTS
VCC
5k
RxIN
RxOUT
LOGIC
OUTPUTS
EN *SHDN
250pF or 1000pF
VCC
* SP3222EB only
Rev. A Date:12/11/03 SP3222EU/3232EU 3.3V, 1000kbps RS-232 Transceivers © Copyright 2003 Sipex Corporation
10
Since receiver input is usually from a trans-
mission line where long cable lengths and
system interference can degrade the signal and
inject noise, the inputs have a typical hyster-
esis margin of 300mV. Should an input be left
unconnected, a 5k pulldown resistor to
ground will commit the output of the receiver
to a HIGH state.
Charge Pump
The charge pump is a Sipex–patented design
(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.
In most circumstances, decoupling the power
supply can be achieved adequately using a
0.1µF bypass capacitor at C5 (refer to Figures
9 and 10). In applications that are sensitive to
power-supply noise, decouple VCC to ground
with a capacitor of the same value as charge-
pump capacitor C1. Physically connect
bypass capacitors as close to the IC as
possible.
The charge pumps operate in a discontinuous
mode using an internal oscillator. If the
output voltages are less than a magnitude of
5.5V, the charge pumps are enabled. If the
output voltage exceed a magnitude of 5.5V,
the charge pumps are disabled. This oscillator
controls the four phases 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
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 gener-
ated 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.
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 side of capacitor C2. Since C2+ is
at VCC, the voltage potential across C2 is 2
times VCC.
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 capaci-
tor C1 is switched to VCC and the negative side
Table 2. SP3222EU Truth Table Logic for Shutdown
and Enable Control
NDHSNETUOxTTUOxR
00 etats-irTevitcA
01 etats-irTetats-irT
10 evitcAevitcA
11 evitcAetats-irT
11
Rev. A Date:12/11/03 SP3222EU/3232EU 3.3V, 1000Kbps RS-232 Transceivers © Copyright 2003 Sipex Corporation
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
from VCC; in a no–load condition V+ and V
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 inefficien-
cies in the design.
The clock rate for the charge pump typically
operates at 250kHz. The external capacitors
can be as low as 0.1µF with a 16V breakdown
voltage rating.
ESD Tolerance
The SP3222EU/3232EU 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 electrostatic discharges and
associated
transients. The improved ESD tolerance is at
least ±15kV without damage nor latch-up.
There are different methods of ESD testing
applied: a) MIL-STD-883, Method 3015.7
b) IEC1000-4-2 Air-Discharge
c) IEC1000-4-2 Direct Contact
The Human Body Model has been the
generally accepted ESD testing method for
semiconductors. This method is also speci-
fied 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 electrostatic energy and
discharge it to an integrated circuit. The
simulation is performed by using a test model
as shown in Figure 20. 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.
The IEC-1000-4-2, formerly IEC801-2, is
generally used for testing ESD on equipment
and systems. For system manufacturers, they
must guarantee a certain amount of ESD
protection since the system itself is exposed to
the outside environment and human presence.
The premise with IEC1000-4-2 is that the
system is required to withstand an amount of
static electricity when ESD is applied to
points and surfaces of the equipment that are
accessible to personnel during normal usage.
The transceiver IC receives most of the ESD
current when the ESD source is applied to the
connector pins. The test circuit for IEC1000-4-2
is shown on Figure 21. There are two
methods within IEC1000-4-2, the Air Dis-
charge method and the Contact Discharge
method.
With the Air Discharge Method, an ESD
voltage is applied to the equipment under
test (EUT) through air. This simulates an
electrically charged person ready to connect a
cable onto the rear of the system only to find
an unpleasant zap just before the person
touches the back panel. The high energy
potential on the person discharges through
an arcing path to the rear panel of the system
before he or she even touches the system.
This energy, whether discharged directly or
through air, is predominantly a function of the
discharge current rather than the discharge
voltage.
Variables with an air discharge such as
approach speed of the object carrying the ESD
potential to the system and humidity will tend
to change the discharge current. For example,
the rise time of the discharge current varies
with the approach speed.
The Contact Discharge Method applies the
ESD current directly to the DUT.
Rev. A Date:12/11/03 SP3222EU/3232EU 3.3V, 1000kbps RS-232 Transceivers © Copyright 2003 Sipex Corporation
12
Figure 15. Charge Pump — Phase 1
Figure 16. Charge Pump — Phase 2
Figure 17. Charge Pump Waveforms
Figure 18. Charge Pump — Phase 3
Figure 19. Charge Pump — Phase 4
Ch1 2.00V Ch2 2.00V M 1.00µs Ch1 5.48V
2
1T
T[]
T
+6V
a) C
2+
b) C
2
-
GND
GND
-6V
V
CC
= +5V
–5V –5V
+5V
V
SS
Storage Capacitor
V
DD
Storage Capacitor
C
1
C
2
C
3
C
4
+
+
++
VCC = +5V
–10V
VSS Storage Capacitor
VDD Storage Capacitor
C1C2
C3
C4
+
+
++
V
CC
= +5V
–5V
+5V
–5V
V
SS
Storage Capacitor
V
DD
Storage Capacitor
C
1
C
2
C
3
C
4
+
+
++
V
CC
= +5V
+10V
V
SS
Storage Capacitor
V
DD
Storage Capacitor
C
1
C
2
C
3
C
4
+
+
++
13
Rev. A Date:12/11/03 SP3222EU/3232EU 3.3V, 1000Kbps RS-232 Transceivers © Copyright 2003 Sipex Corporation
This method was devised to reduce the
unpredictability of the ESD arc. The dis-
charge current rise time is constant since the
energy is directly transferred without the air-
gap arc. In situations such as hand held
systems, the ESD charge can be directly
discharged to the equipment from a person
already holding the equipment. The current is
transferred on to the keypad or the serial port
of the equipment directly and then travels
through the PCB and finally to the IC.
The circuit models in Figures 20 and 21
represent the typical ESD testing circuits used
for all three methods. The CS is initially
charged with the DC power supply when the
first switch (SW1) is on. Now that the
capacitor is charged, the second switch (SW2)
is on while SW1 switches off. The voltage
stored in the capacitor is then applied through
RS, the current limiting resistor, onto the
device under test (DUT). In ESD tests, the
SW2 switch is pulsed so that the device under
test receives a duration of voltage.
Figure 20. ESD Test Circuit for Human Body Model
Figure 21. ESD Test Circuit for IEC1000-4-2
R
C
C
S
R
S
SW1 SW2
R
C
Device
Under
Test
DC Power
Source
C
S
R
S
SW1 SW2
R
S
and
R
V
add up to 330 for IEC1000-4-2.
R
S
and
R
V
add up to 330 for IEC1000-4-2.
Contact-Discharge Module
R
V
R
C
C
S
R
S
SW1 SW2
R
C
Device
Under
Test
DC Power
Source
C
S
R
S
SW1 SW2
R
V
Contact-Discharge Module
Rev. A Date:12/11/03 SP3222EU/3232EU 3.3V, 1000kbps RS-232 Transceivers © Copyright 2003 Sipex Corporation
14
Figure 22. ESD Test Waveform for IEC1000-4-2
30A
I
0A
15A
t=30ns
t
t=0ns
For the Human Body Model, the current
limiting resistor (RS) and the source capacitor
(CS) are 1.5k an 100pF, respectively. For
IEC-1000-4-2, the current limiting resistor
(RS) and the source capacitor (CS) are 330
an 150pF, respectively.
The higher CS value and lower RS value in
the IEC1000-4-2 model are more stringent
than the Human Body Model. The larger
storage capacitor injects a higher voltage to
the test point when SW2 is switched on. The
lower current limiting resistor increases the
current charge onto the test point.
Device Pin Human Body IEC1000-4-2
Tested Model Air Discharge Direct Contact Level
Driver Outputs ±15kV ±15kV ±8kV 4
Receiver Inputs ±15kV ±15kV ±8kV 4
Table 3. Transceiver ESD Tolerance Levels
15
Rev. A Date:12/11/03 SP3222EU/3232EU 3.3V, 1000Kbps RS-232 Transceivers © Copyright 2003 Sipex Corporation
D
EH
PACKAGE: PLASTIC SHRINK
SMALL OUTLINE
(SSOP)
DIMENSIONS (Inches)
Minimum/Maximum
(mm) 20–PIN
A
A1
Ø
L
Be
A
A1
B
D
E
e
H
L
Ø
0.068/0.078
(1.73/1.99)
0.002/0.008
(0.05/0.21)
0.010/0.015
(0.25/0.38)
0.278/0.289
(7.07/7.33)
0.205/0.212
(5.20/5.38)
0.0256 BSC
(0.65 BSC)
0.301/0.311
(7.65/7.90)
0.022/0.037
(0.55/0.95)
0°/8°
(0°/8°)
16–PIN
0.068/0.078
(1.73/1.99)
0.002/0.008
(0.05/0.21)
0.010/0.015
(0.25/0.38)
0.239/0.249
(6.07/6.33)
0.205/0.212
(5.20/5.38)
0.0256 BSC
(0.65 BSC)
0.301/0.311
(7.65/7.90)
0.022/0.037
(0.55/0.95)
0°/8°
(0°/8°)
Rev. A Date:12/11/03 SP3222EU/3232EU 3.3V, 1000kbps RS-232 Transceivers © Copyright 2003 Sipex Corporation
16
D
ALTERNATE
END PINS
(BOTH ENDS)
D1 = 0.005" min.
(0.127 min.)
E
PACKAGE: PLASTIC
DUAL–IN–LINE
(NARROW)
A = 0.210" max.
(5.334 max).
E1
C
Ø
LA2
A1 = 0.015" min.
(0.381min.)
B
B1
e = 0.100 BSC
(2.540 BSC) e
A
= 0.300 BSC
(7.620 BSC)
DIMENSIONS (Inches)
Minimum/Maximum
(mm)
A2
B
B1
C
D
E
E1
L
Ø
16–PIN
0.115/0.195
(2.921/4.953)
0.014/0.022
(0.356/0.559)
0.045/0.070
(1.143/1.778)
0.008/0.014
(0.203/0.356)
0.780/0.800
(19.812/20.320)
0.300/0.325
(7.620/8.255)
0.240/0.280
(6.096/7.112)
0.115/0.150
(2.921/3.810)
0°/ 15°
(0°/15°)
18–PIN
0.115/0.195
(2.921/4.953)
0.014/0.022
(0.356/0.559)
0.045/0.070
(1.143/1.778)
0.008/0.014
(0.203/0.356)
0.880/0.920
(22.352/23.368)
0.300/0.325
(7.620/8.255)
0.240/0.280
(6.096/7.112)
0.115/0.150
(2.921/3.810)
0°/ 15°
(0°/15°)
17
Rev. A Date:12/11/03 SP3222EU/3232EU 3.3V, 1000Kbps RS-232 Transceivers © Copyright 2003 Sipex Corporation
D
EH
PACKAGE: PLASTIC
SMALL OUTLINE (SOIC)
(WIDE)
DIMENSIONS (Inches)
Minimum/Maximum
(mm)
A
A1
Ø
L
Be
A
A1
B
D
E
e
H
L
Ø
16–PIN
0.090/0.104
(2.29/2.649)
0.004/0.012
(0.102/0.300)
0.013/0.020
(0.330/0.508)
0.398/0.413
(10.10/10.49)
0.291/0.299
(7.402/7.600)
0.050 BSC
(1.270 BSC)
0.394/0.419
(10.00/10.64)
0.016/0.050
(0.406/1.270)
0°/8°
(0°/8°)
18–PIN
0.090/0.104
(2.29/2.649))
0.004/0.012
(0.102/0.300)
0.013/0.020
(0.330/0.508)
0.447/0.463
(11.35/11.74)
0.291/0.299
(7.402/7.600)
0.050 BSC
(1.270 BSC)
0.394/0.419
(10.00/10.64)
0.016/0.050
(0.406/1.270)
0°/8°
(0°/8°)
Rev. A Date:12/11/03 SP3222EU/3232EU 3.3V, 1000kbps RS-232 Transceivers © Copyright 2003 Sipex Corporation
18
D
EH
PACKAGE: PLASTIC
SMALL OUTLINE (SOIC)
(NARROW)
DIMENSIONS (Inches)
Minimum/Maximum
(mm)
A
A1
Ø
L
Be
h x 45°
A
A1
B
D
E
e
H
h
L
Ø
16–PIN
0.053/0.069
(1.346/1.748)
0.004/0.010
(0.102/0.249)
0.013/0.020
(0.330/0.508)
0.386/0.394
(9.802/10.000)
0.150/0.157
(3.802/3.988)
0.050 BSC
(1.270 BSC)
0.228/0.244
(5.801/6.198)
0.010/0.020
(0.254/0.498)
0.016/0.050
(0.406/1.270)
0°/8°
(0°/8°)
19
Rev. A Date:12/11/03 SP3222EU/3232EU 3.3V, 1000Kbps RS-232 Transceivers © Copyright 2003 Sipex Corporation
Gage
Plane
1.0 OIA
e
0.169 (4.30)
0.177 (4.50)
0.252 BSC (6.4 BSC)
0’-8’ 12’REF
0.039 (1.0)
e/2
0.039 (1.0)
0.126 BSC (3.2 BSC)
D
0.007 (0.19)
0.012 (0.30)
0.033 (0.85)
0.037 (0.95)
0.002 (0.05)
0.006 (0.15)
0.043 (1.10) Max
(θ3)
1.0 REF
0.020 (0.50)
0.026 (0.75) (θ1)
0.004 (0.09) Min
0.004 (0.09) Min
0.010 (0.25)
(θ2)
0.008 (0.20)
DIMENSIONS
in inches (mm) Minimum/Maximum
Symbol 14 Lead 16 Lead 20 Lead 24 Lead 28 Lead 38 Lead
D 0.193/0.201 0.193/0.201 0.252/0.260 0.303/0.311 0.378/0.386 0.378/0.386
(4.90/5.10) (4.90/5.10) (6.40/6.60) (7.70/7.90) (9.60/9.80) (9.60/9.80)
e 0.026 BSC 0.026 BSC 0.026 BSC 0.026 BSC 0.026 BSC 0.020 BSC
(0.65 BSC) (0.65 BSC) (0.65 BSC) (0.65 BSC) (0.65 BSC) (0.50 BSC)
PACKAGE: PLASTIC THIN
SMALL OUTLINE
(TSSOP)
Rev. A Date:12/11/03 SP3222EU/3232EU 3.3V, 1000kbps RS-232 Transceivers © Copyright 2003 Sipex Corporation
20
ORDERING INFORMATION
Model Temperature Range Package Type
SP3222EUCA .......................................... 0˚C to +70˚C.......................................... 20-Pin SSOP
SP3222EUCP .......................................... 0˚C to +70˚C............................................18-Pin PDIP
SP3222EUCT .......................................... 0˚C to +70˚C ........................................ 18-Pin WSOIC
SP3222EUCY .......................................... 0˚C to +70˚C........................................ 20-Pin TSSOP
SP3232EUCA .......................................... 0˚C to +70˚C.......................................... 16-Pin SSOP
SP3232EUCP .......................................... 0˚C to +70˚C............................................16-Pin PDIP
SP3232EUCT .......................................... 0˚C to +70˚C ........................................ 16-Pin WSOIC
SP3232EUCY .......................................... 0˚C to +70˚C ........................................ 16-Pin TSSOP
SP3232EUCN........................................... 0˚C to +70˚C......................................... 16-Pin nSOIC
Corporation
SIGNAL PROCESSING EXCELLENCE
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.
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
Please consult the factory for pricing and availability on a Tape-On-Reel option.