SIPEX SP3232EUCN

®
SP3222EU/3232EU
3.3V, 1000 Kbps 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
■ 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
DESCRIPTION
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.
SELECTION TABLE
MODEL
Power Supplies
RS-232
Drivers
RS-232
Receivers
External
Components
Shutdown
TTL
3-State
No. of
Pins
SP3222EU
+3.0V to +5.5V
2
2
4
Yes
Yes
18, 20
SP3232EU
+3.0V to +5.5V
2
2
4
No
No
16
Rev. A Date:12/11/03
SP3222EU/3232EU 3.3V, 1000Kbps RS-232 Transceivers
1
© Copyright 2003 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 and cause
permanent damage to the device.
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
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
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
ICC (DC VCC or GND current) ......................... ±100mA
Input Voltages
TxIN, EN ............................................ -0.3V to +6.0V
RxIN .................................................................. ±25V
NOTE 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.
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
µA
SHDN = GND,TAMB = +25°C,
VCC= +3.3V, TxIN = GND or VCC
0.8
V
TxIN, EN, SHDN, Note 2
V
VCC = 3.3V, Note2
VCC = 5.0V, Note 2
TxIN, EN, SHDN, TAMB = +25°C,
VIN= 0V to VCC
LOGIC INPUTS AND RECEIVER OUTPUTS
Input Logic Threshold LOW
GND
Input Logic Threshold HIGH
2.0
2.4
VCC
Input Leakage Current
±0.01
±1.0
µA
Output Leakage Current
±0.05
±10
µA
receivers disabled, VOUT = 0V to VCC
0.4
V
IOUT = 1.6mA
Output Voltage LOW
Output Voltage HIGH
VCC-0.6
VCC-0.1
V
IOUT = -1.0mA
Output Voltage Swing
±5.0
±5.4
V
3kΩ load to ground at all driver
outputs,TAMB = +25°C
Output Resistance
300
DRIVER OUTPUTS
Output Short-Circuit Current
Output Leakage Current
Rev. A Date:12/11/03
Ω
±35
VCC = V+ = V- = 0V, TOUT = +2V
±60
mA
VOUT = 0V
±25
µA
VOUT = +12V,VCC= 0V to 5.5V,drivers
disabled
SP3222EU/3232EU 3.3V, 1000kbps RS-232 Transceivers
2
© 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.
PARAMETER
MIN.
TYP.
MAX.
UNITS
+25
V
CONDITIONS
RECEIVER INPUTS
Input Voltage Range
-25
Input Threshold LOW
0.6
0.8
Input Threshold HIGH
1.5
1.8
Input Hysteresis
Input Resistance
1.2
1.5
V
V
VCC=3.3V
VCC=5.0V
2.4
2.4
V
V
VCC=3.3V
VCC=5.0V
7
kΩ
0.3
3
5
V
TIMING CHARACTERISTICS
Maximum Data Rate
1000
kbps
RL=3kΩ, CL=250pF, one driver
switching
Receiver Propagation Delay
0.15
0.15
µs
tPHL, RxIN to RxOUT, CL=150pF
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/µs
VCC = 3.3V, RL = 3KΩ, TAMB = 25°C,
measurements taken from -3.0V to
+3.0V or +3.0V to -3.0V
NOTE 2: Driver input hysteresis is typically 250mV.
Rev. A Date:12/11/03
SP3222EU/3232EU 3.3V, 1000Kbps RS-232 Transceivers
3
© Copyright 2003 Sipex Corporation
TYPICAL PERFORMANCE CHARACTERISTICS
Unless otherwise noted, the following performance characteristics apply for VCC = +3.3V, 1000kbps data rates, all drivers
loaded with 3kΩ, 0.1µF charge pump capacitors, and TAMB = +25°C.
120
4
Slew Rate (V / µs)
Transmitter
Output Voltage (V)
6
T1 at 1Mbps
T2 at 62.5Kbps
2
0
-2
-4
-6
250
500
1000
Load Capacitance (pF)
1500
60
40
20
0
Figure 1. Transmitter Output Voltage vs Load
Capacitance for the SP3222EU and the SP3232EU
250
500
1000
1500
Load Capacitance (pF)
2000
Figure 2. Slew Rate vs Load Capacitance for the
SP3222EU and the SP3232EU
35
20
Supply Current (mA)
Supply Current (mA)
80
0
0
30
20
15
10
T1 at 1Mbps
T2 at 62.5Kbps
5
0
0
250
500
1000
Load Capacitance (pF)
15
T1 at Mbps
T2 at 62.5Kbps
10
5
0
1500
2.7
3
3.5
4
Supply Voltage (V)
4.5
5
Figure 4. Supply Current vs Supply Voltage for the
SP3222EU and the SP3232EU
Figure 3. Supply Current vs Load Capacitance when
Transmitting Data for the SP3222EU and the SP3232EU
6
200
4
Skew (nS)
Transmitter Output
Voltage (V)
T1 at 1Mbps
T2 at 62.5Kbps
All TX loaded 3K // CLoad
100
2
T1 at 1Mbps
T2 at 62.5Kbps
0
-2
150
100
T1 at 500Kbps
T2 at 31.2Kbps
All TX loaded 3K // CLoad
50
-4
0
-6
2.7
3
3.5
4
Supply Voltage (V)
4.5
0
5
Figure 5. Transmitter Output Voltage vs Supply Voltage
for the SP3222EU and the SP3232EU
Rev. A Date:12/11/03
250
500
1000
1500
Load Capacitance (pF)
2000
Figure 6. Transmitter Skew vs Load Capacitance for the
SP3222EU and the SP3232EU
SP3222EU/3232EU 3.3V, 1000kbps RS-232 Transceivers
4
© Copyright 2003 Sipex Corporation
PIN NUMBER
NAME
SP3222EU
FUNCTION
DIP/SO
SSOP
TSSOP
SP3232EU
EN
Receiver Enable. Apply logic LOW for normal operation.
Apply logic HIGH to disable the receiver outputs (high-Z state).
1
1
-
C1+
Positive terminal of the voltage doubler charge-pump capacitor.
2
2
1
V+
+5.5V generated by the charge pump.
3
3
2
C1-
Negative terminal of the voltage doubler charge-pump capacitor.
4
4
3
C2+
Positive terminal of the inverting charge-pump capacitor.
5
5
4
C2-
Negative terminal of the inverting charge-pump capacitor.
6
6
5
V-
-5.5V generated by the charge pump.
7
7
6
T1OUT
RS-232 driver output.
15
17
14
T2OUT
RS-232 driver output.
8
8
7
R1IN
RS-232 receiver input.
14
16
13
R2IN
RS-232 receiver input.
9
9
8
R1OUT
TTL/CMOS reciever output.
13
15
12
R2OUT
TTL/CMOS reciever output.
10
10
9
T1IN
TTL/CMOS driver input.
12
13
11
T2IN
TTL/CMOS driver input.
11
12
10
GND
Ground.
16
18
15
+3.0V to +5.5V supply voltage
17
19
16
Shutdown Control Input. Drive HIGH for normal device operation.
Drive LOW to shutdown the drivers (high-Z output) and the onboard power supply.
18
20
-
-
11, 14
-
VCC
SHDN
N.C.
No Connect.
Table 1. Device Pin Description
Rev. A Date:12/11/03
SP3222EU/3232EU 3.3V, 1000Kbps RS-232 Transceivers
5
© Copyright 2003 Sipex Corporation
EN
20 SHDN
1
C1+ 2
EN
19 VCC
V+
3
18 GND
C1-
4
17
C2+
5
SP3222EU 16
C2-
6
15 R1OUT
V-
7
14
T2OUT
8
13 T1IN
R2IN
9
12 T2IN
R2OUT 10
11
18 SHDN
1
C1+ 2
T1OUT
R1IN
N.C.
17 VCC
V+
3
16 GND
C1-
4
15
C2+
5
SP3222EU 14
C2-
6
13 R1OUT
V-
7
12 T1IN
T2OUT
8
11 T2IN
R2IN
9
10
T1OUT
R1IN
R2OUT
N.C.
DIP/SO
SSOP/TSSOP
Figure 7. Pinout Configurations for the SP3222EU
16 VCC
C1+ 1
V+ 2
15 GND
C1-
3
C2+
4
C2-
5
12 R1OUT
V-
6
11 T1IN
T2OUT
7
10
R2IN
8
9
14 T1OUT
SP3232EU 13 R1IN
T2IN
R2OUT
Figure 8. Pinout Configuration for the SP3232EU
Rev. A Date:12/11/03
SP3222EU/3232EU 3.3V, 1000kbps RS-232 Transceivers
6
© Copyright 2003 Sipex Corporation
VCC
C5
C1
+
+
VCC
19
VCC
0.1µF
V+
LOGIC
INPUTS
+
0.1µF
6 C2-
0.1µF
+
C1
2 C1+
V+
3
0.1µF
*C3
4 C1-
SP3222EU
SSOP
TSSOP
V-
7
13 T1IN
T1OUT
17
12 T2IN
T2OUT
8
R1IN
R2IN
+
0.1µF
+
C2
RS-232
OUTPUTS
0.1µF
LOGIC
INPUTS
16
RS-232
INPUTS
9
C4
T1OUT
15
11 T2IN
T2OUT
8
R1IN
14
R2IN
9
5kΩ
LOGIC
OUTPUTS
10 R2OUT
+
0.1µF
7
12 T1IN
5kΩ
1 EN
V-
6 C2-
13 R1OUT
5kΩ
10 R2OUT
SP3222EU
DIP/SO
5 C2+
C4
15 R1OUT
LOGIC
OUTPUTS
+
*C3
4 C1-
C2
17
VCC
0.1µF
3
0.1µF
5 C2+
+
C5
2 C1+
+
0.1µF
RS-232
OUTPUTS
RS-232
INPUTS
5kΩ
SHDN
20
1 EN
SHDN
GND
GND
*can be returned to
either VCC or GND
18
18
16
*can be returned to
either VCC or GND
Figure 9. SP3222EU Typical Operating Circuits
VCC
+
C5
+
C1
16
VCC
0.1µF
1 C1+
V+
2
0.1µF
*C3
3 C14 C2+
+
C2
LOGIC
INPUTS
0.1µF
SP3232EU
C4
11 T1IN
T1OUT
14
10 T2IN
T2OUT
7
R1IN
13
R2IN
8
5kΩ
9 R2OUT
0.1µF
6
5 C2-
12 R1OUT
LOGIC
OUTPUTS
V-
+
+
0.1µF
RS-232
OUTPUTS
RS-232
INPUTS
5kΩ
GND
15
*can be returned to
either VCC or GND
Figure 10. SP3232EU Typical Operating Circuit
Rev. A Date:12/11/03
SP3222EU/3232EU 3.3V, 1000Kbps RS-232 Transceivers
7
© Copyright 2003 Sipex Corporation
DESCRIPTION
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 and SP3232EU are 2 driver/
2receiver devices ideal for portable or handheld 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 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.
The SP3222EU/3232EU transceivers meet the
EIA/TIA-232 and V.28/V.24 communication
protocols They feature Sipex's proprietary onboard 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.
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.
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/TIA562 levels of ±3.7V with supply voltages as
low as 2.7V.
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 tristated 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.
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.
Rev. A Date:12/11/03
SP3222EU/3232EU 3.3V, 1000kbps RS-232 Transceivers
8
© Copyright 2003 Sipex Corporation
VCC
C5
C1
+
+
0.1µF
VCC
C1+
V+
0.1µF
+
0.1µF
C3
C1-
C2
+
C2+
0.1µF
SP3222EU
SP3232EU
VC4
C2LOGIC
INPUTS
LOGIC
OUTPUTS
+
0.1µF
TxOUT
TxIN
RxIN
RxOUT
5kΩ
EN
*SHDN
VCC
GND
250pF or 1000pF
* SP3222EB only
Figure 11. SP3222EU/3232EU Driver Loopback Test Circuit
Figure 12. Driver Loopback Test All Drivers at 250kbps
Rev. A Date:12/11/03
Figure 13. Driver Loopback Test One Driver 1Mbps
SP3222EU/3232EU 3.3V, 1000Kbps RS-232 Transceivers
9
© Copyright 2003 Sipex Corporation
Since receiver input is usually from a transmission line where long cable lengths and
system interference can degrade the signal and
inject noise, the inputs have a typical hysteresis margin of 300mV. Should an input be left
unconnected, a 5kΩ pulldown resistor to
ground will commit the output of the receiver
to a HIGH state.
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.
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.
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.
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 chargepump capacitor C1. Physically connect
bypass capacitors as close to the IC as
possible.
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.
The charge pumps operate in a discontinuous
mode using an internal oscillator. If the
SHDN
EN
TxOUT
RxOUT
0
0
Tri-state
Active
0
1
Tri-state
Tri-state
1
0
Active
Active
1
1
Active
Tri-state
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
Table 2. SP3222EU Truth Table Logic for Shutdown
and Enable Control
Rev. A Date:12/11/03
SP3222EU/3232EU 3.3V, 1000kbps RS-232 Transceivers
10
© 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.
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 Discharge method and the Contact Discharge
method.
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 inefficiencies 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.
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.
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 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 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
Rev. A Date:12/11/03
The Contact Discharge Method applies the
ESD current directly to the DUT.
SP3222EU/3232EU 3.3V, 1000Kbps RS-232 Transceivers
11
© Copyright 2003 Sipex Corporation
VCC = +5V
C4
+5V
+
C1
C2
–
–5V
+
–
–
+
VDD Storage Capacitor
+
–
VSS Storage Capacitor
C3
–5V
Figure 15. Charge Pump — Phase 1
VCC = +5V
C4
C1
+
C2
–
+
–
–
+
VDD Storage Capacitor
+
–
VSS Storage Capacitor
C3
–10V
Figure 16. Charge Pump — Phase 2
[
T
]
+6V
a) C2+
T
GND 1
GND 2
b) C2-
T
-6V
Ch1 2.00V Ch2 2.00V M 1.00µs Ch1 5.48V
Figure 17. Charge Pump Waveforms
VCC = +5V
+5V
C4
+
C1
+
C2
–
–5V
–
+
–
–5V
+
–
VDD Storage Capacitor
VSS Storage Capacitor
C3
Figure 18. Charge Pump — Phase 3
VCC = +5V
C4
+10V
+
C1
+
C2
–
–
+
–
–
+
VDD Storage Capacitor
VSS Storage Capacitor
C3
Figure 19. Charge Pump — Phase 4
Rev. A Date:12/11/03
SP3222EU/3232EU 3.3V, 1000kbps RS-232 Transceivers
12
© Copyright 2003 Sipex Corporation
R
RSS
R
RC
C
SW2
SW2
SW1
SW1
Device
Under
Test
C
CSS
DC Power
Source
Figure 20. ESD Test Circuit for Human Body Model
This method was devised to reduce the
unpredictability of the ESD arc. The discharge current rise time is constant since the
energy is directly transferred without the airgap 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.
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.
The circuit models in Figures 20 and 21
Contact-Discharge Module
R
RSS
R
RC
C
RV
SW2
SW2
SW1
SW1
Device
Under
Test
C
CSS
DC Power
Source
RS and RV add up to 330Ω for IEC1000-4-2.
Figure 21. ESD Test Circuit for IEC1000-4-2
Rev. A Date:12/11/03
SP3222EU/3232EU 3.3V, 1000Kbps RS-232 Transceivers
13
© Copyright 2003 Sipex Corporation
I➙
For the Human Body Model, the current
limiting resistor (RS) and the source capacitor
(CS) are 1.5kΩ an 100pF, respectively. For
IEC-1000-4-2, the current limiting resistor
(RS) and the source capacitor (CS) are 330Ω
an 150pF, respectively.
30A
15A
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.
0A
t=0ns
t➙
t=30ns
Figure 22. ESD Test Waveform for IEC1000-4-2
Device Pin
Tested
Human Body
Model
Air Discharge
Driver Outputs
Receiver Inputs
±15kV
±15kV
±15kV
±15kV
IEC1000-4-2
Direct Contact
±8kV
±8kV
Level
4
4
Table 3. Transceiver ESD Tolerance Levels
Rev. A Date:12/11/03
SP3222EU/3232EU 3.3V, 1000kbps RS-232 Transceivers
14
© Copyright 2003 Sipex Corporation
PACKAGE: PLASTIC SHRINK
SMALL OUTLINE
(SSOP)
E
H
D
A
Ø
e
B
A1
L
DIMENSIONS (Inches)
Minimum/Maximum
(mm)
Rev. A Date:12/11/03
16–PIN
20–PIN
A
0.068/0.078
(1.73/1.99)
0.068/0.078
(1.73/1.99)
A1
0.002/0.008
(0.05/0.21)
0.002/0.008
(0.05/0.21)
B
0.010/0.015
(0.25/0.38)
0.010/0.015
(0.25/0.38)
D
0.239/0.249
(6.07/6.33)
0.278/0.289
(7.07/7.33)
E
0.205/0.212
(5.20/5.38)
0.205/0.212
(5.20/5.38)
e
0.0256 BSC
(0.65 BSC)
0.0256 BSC
(0.65 BSC)
H
0.301/0.311
(7.65/7.90)
0.301/0.311
(7.65/7.90)
L
0.022/0.037
(0.55/0.95)
0.022/0.037
(0.55/0.95)
Ø
0°/8°
(0°/8°)
0°/8°
(0°/8°)
SP3222EU/3232EU 3.3V, 1000Kbps RS-232 Transceivers
15
© Copyright 2003 Sipex Corporation
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
e = 0.100 BSC
(2.540 BSC)
B1
B
Ø
L
eA = 0.300 BSC
(7.620 BSC)
ALTERNATE
END PINS
(BOTH ENDS)
DIMENSIONS (Inches)
Minimum/Maximum
(mm)
16–PIN
18–PIN
A2
0.115/0.195
(2.921/4.953)
0.115/0.195
(2.921/4.953)
B
0.014/0.022
(0.356/0.559)
0.014/0.022
(0.356/0.559)
B1
0.045/0.070
(1.143/1.778)
0.045/0.070
(1.143/1.778)
C
0.008/0.014
(0.203/0.356)
0.008/0.014
(0.203/0.356)
0.780/0.800
0.880/0.920
(19.812/20.320) (22.352/23.368)
D
Rev. A Date:12/11/03
E
0.300/0.325
(7.620/8.255)
0.300/0.325
(7.620/8.255)
E1
0.240/0.280
(6.096/7.112)
0.240/0.280
(6.096/7.112)
L
0.115/0.150
(2.921/3.810)
0.115/0.150
(2.921/3.810)
Ø
0°/ 15°
(0°/15°)
0°/ 15°
(0°/15°)
SP3222EU/3232EU 3.3V, 1000kbps RS-232 Transceivers
16
© Copyright 2003 Sipex Corporation
PACKAGE: PLASTIC
SMALL OUTLINE (SOIC)
(WIDE)
E
H
D
A
Ø
e
B
A1
L
DIMENSIONS (Inches)
Minimum/Maximum
(mm)
Rev. A Date:12/11/03
16–PIN
18–PIN
A
0.090/0.104
(2.29/2.649)
0.090/0.104
(2.29/2.649))
A1
0.004/0.012
(0.102/0.300)
0.004/0.012
(0.102/0.300)
B
0.013/0.020
(0.330/0.508)
0.013/0.020
(0.330/0.508)
D
0.398/0.413
(10.10/10.49)
0.447/0.463
(11.35/11.74)
E
0.291/0.299
(7.402/7.600)
0.291/0.299
(7.402/7.600)
e
0.050 BSC
(1.270 BSC)
0.050 BSC
(1.270 BSC)
H
0.394/0.419
(10.00/10.64)
0.394/0.419
(10.00/10.64)
L
0.016/0.050
(0.406/1.270)
0.016/0.050
(0.406/1.270)
Ø
0°/8°
(0°/8°)
0°/8°
(0°/8°)
SP3222EU/3232EU 3.3V, 1000Kbps RS-232 Transceivers
17
© Copyright 2003 Sipex Corporation
PACKAGE: PLASTIC
SMALL OUTLINE (SOIC)
(NARROW)
E
H
h x 45°
D
A
Ø
e
B
A1
L
DIMENSIONS (Inches)
Minimum/Maximum
(mm)
Rev. A Date:12/11/03
16–PIN
A
0.053/0.069
(1.346/1.748)
A1
0.004/0.010
(0.102/0.249)
B
0.013/0.020
(0.330/0.508)
D
0.386/0.394
(9.802/10.000)
E
0.150/0.157
(3.802/3.988)
e
0.050 BSC
(1.270 BSC)
H
0.228/0.244
(5.801/6.198)
h
0.010/0.020
(0.254/0.498)
L
0.016/0.050
(0.406/1.270)
Ø
0°/8°
(0°/8°)
SP3222EU/3232EU 3.3V, 1000kbps RS-232 Transceivers
18
© Copyright 2003 Sipex Corporation
PACKAGE: PLASTIC THIN
SMALL OUTLINE
(TSSOP)
DIMENSIONS
in inches (mm) Minimum/Maximum
Symbol
D
e
14 Lead
16 Lead
20 Lead
24 Lead
28 Lead
38 Lead
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)
0.026 BSC
(0.65 BSC)
0.026 BSC
(0.65 BSC)
0.026 BSC
(0.65 BSC)
0.026 BSC
(0.65 BSC)
0.026 BSC 0.020 BSC
(0.65 BSC) (0.50 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
0.010 (0.25)
(θ3)
0.020 (0.50)
0.026 (0.75)
(θ1)
1.0 REF
Rev. A Date:12/11/03
SP3222EU/3232EU 3.3V, 1000Kbps RS-232 Transceivers
19
© Copyright 2003 Sipex Corporation
ORDERING INFORMATION
Model
SP3222EUCA
SP3222EUCP
SP3222EUCT
SP3222EUCY
Temperature Range
Package Type
.......................................... 0˚C to +70˚C .......................................... 20-Pin SSOP
.......................................... 0˚C to +70˚C ............................................ 18-Pin PDIP
.......................................... 0˚C to +70˚C ........................................ 18-Pin WSOIC
.......................................... 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
Please consult the factory for pricing and availability on a Tape-On-Reel option.
Corporation
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: [email protected]
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.
Rev. A Date:12/11/03
SP3222EU/3232EU 3.3V, 1000kbps RS-232 Transceivers
20
© Copyright 2003 Sipex Corporation