ST3232E
ST3232E
±15KV ESD-PROTECTED, 3 TO 5.5V, LOW POWER, UP TO 250KBPS, RS-232 DRIVERS AND RECEIVERS
■ESD PROTECTIO FOR RS-232 I/O PINS ±15KV HUMAN BODY MODEL
±8KV IEC 1000-4-2 CONTACT DISCHARGE
■300μA SUPPLY CURRENT
■250Kbps MINIMUM GUARENTEED DATA RATE
■6V/μs MINIMUM GUARANTEED SLEW RATE
■MEET EIA/TIA-232 SPECIFICATIONS DOWN TO 3V
■AVAILABLE IN DIP-16, SO-16, SO-16 LARGE SSOP16 AND TSSOP16
DESCRIPTION
The ST3232E is a 3V powered EIA/TIA-232 and V.28/V.24 communication interfaces with low power requirements, high data-rate capabilities and enhanced electrostatic discharge (ESD) protection to ±8kV using IEC1000-4-2 Contact Discharge and ±15kV using the Human Body Model. ST3232E has a proprietary low dropout transmitter output stage providing true RS-232 performance from 3 to 5V supplies witha a dual charge pump. The charge pump requires only four small 0.1μF standard external capacitors for operations from 3V supply.
The ST3232E has two receivers and two drivers.
DIP |
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SOP |
SOP Large |
SSOP |
TSSOP |
The device is guaranteed to run at data rates of 250Kbps while maintaining RS-232 output levels. Typical applications are Notebook, Subnotebook and Palmtop Computers, Battery Powered Equipment, Hand-Held Equipment, Peripherals and Printers.
ORDERING CODES
Type |
Temperature |
Package |
Comments |
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Range |
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ST3232ECN |
0 to 70 °C |
DIP-16 |
25parts per tube / 40tube per box |
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ST3232EBN |
-40 to 85 °C |
DIP-16 |
25parts per tube / 40tube per box |
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ST3232ECD |
0 to 70 °C |
SO-16 (Tube) |
50parts per tube / 20tube per box |
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ST3232EBD |
-40 to 85 °C |
SO-16 (Tube) |
50parts per tube / 20tube per box |
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ST3232ECDR |
0 to 70 °C |
SO-16 (Tape & Reel) |
2500 parts per reel |
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ST3232EBDR |
-40 to 85 °C |
SO-16 (Tape & Reel) |
2500 parts per reel |
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ST3232ECW |
0 to 70 °C |
SO-16 Large (Tube) |
50parts per tube / 20tube per box |
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ST3232EBW |
-40 to 85 °C |
SO-16 Large (Tube) |
50parts per tube / 20tube per box |
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ST3232ECWR |
0 to 70 °C |
SO-16 Large (Tape & Reel) |
1000 parts per reel |
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ST3232EBWR |
-40 to 85 °C |
SO-16 Large (Tape & Reel) |
1000 parts per reel |
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ST3232ECPR |
0 to 70 °C |
SSOP16 (Tape & Reel) |
1350 parts per reel |
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ST3232EBPR |
-40 to 85 °C |
SSOP16 (Tape & Reel) |
1350 parts per reel |
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ST3232ECTR |
0 to 70 °C |
TSSOP16 (Tape & Reel) |
2500 parts per reel |
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ST3232EBTR |
-40 to 85 °C |
TSSOP16 (Tape & Reel) |
2500 parts per reel |
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April 2003 |
1/16 |
ST3232E
PIN CONFIGURATION
PIN DESCRIPTION
PlN N° |
SYMBOL |
NAME AND FUNCTION |
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1 |
C1+ |
Positive Terminal for the first Charge Pump Capacitor |
2 |
V+ |
Doubled Voltage Terminal |
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3 |
C1- |
Negative Terminal for the first Charge Pump Capacitor |
4 |
C2+ |
Positive Terminal for the second Charge Pump Capacitor |
5 |
C2- |
Negative Terminal for the second Charge Pump Capacitor |
6 |
V- |
Inverted Voltage Terminal |
7 |
T2OUT |
Second Transmitter Output Voltage |
8 |
R2IN |
Second Receiver Input Voltage |
9 |
R2OUT |
Second Receiver Output Voltage |
10 |
T2IN |
Second Transmitter Input Voltage |
11 |
T1IN |
First Transmitter Input Voltage |
12 |
R1OUT |
First Receiver Output Voltage |
13 |
R1IN |
First Receiver Input Voltage |
14 |
T1OUT |
First Transmitter Output Voltage |
15 |
GND |
Ground |
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16 |
VCC |
Supply Voltage |
ABSOLUTE MAXIMUM RATINGS
Symbol |
Parameter |
Value |
Unit |
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VCC |
Supply Voltage |
-0.3 to 6 |
V |
V+ |
Doubled Voltage Terminal |
(VCC - 0.3) to 7 |
V |
V- |
Inverted Voltage Terminal |
0.3 to -7 |
V |
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V+ +|V-| |
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13 |
V |
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TIN |
Transmitter Input Voltage Range |
-0.3 to 6 |
V |
RIN |
Receiver Input Voltage Range |
± 25 |
V |
TOUT |
Transmitter Output Voltage Range |
± 13.2 |
V |
ROUT |
Receiver Output Voltage Range |
-0.3 to (VCC + 0.3) |
V |
tSHORT |
Transmitter Output Short to GND Time |
Continuous |
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Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. V+ and V- can have a maximum magnitude of +7V, but their absolute addition can not exceed 13 V.
2/16
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ST3232E |
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ESD PERFORMANCE: TRANSMITTER OUTPUTS, RECEIVER INPUTS |
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Symbol |
Parameter |
Test Conditions |
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Min. |
Typ. |
Max. |
Unit |
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ESD |
ESD Protection Voltage |
Human Body Model |
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±15 |
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kV |
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ESD |
ESD Protection Voltage |
IEC-1000-4-2 |
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±8 |
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kV |
ELECTRICAL CHARACTERISTICS
(C1 - C4 = 0.1μF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C)
Symbol |
Parameter |
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Test Conditions |
Min. |
Typ. |
Max. |
Unit |
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ISUPPLY |
VCC Power Supply Current |
No Load |
VCC = 3V or 5V TA = 25°C |
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0.3 |
1 |
mA |
LOGIC INPUT ELECTRICAL CHARACTERISTICS
(C1 - C4 = 0.1μF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C)
Symbol |
Parameter |
Test Conditions |
Min. |
Typ. |
Max. |
Unit |
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VTIL |
Input Logic Threshold Low |
T-IN |
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0.8 |
V |
VHYS |
Transmitter Input |
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0.25 |
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V |
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Histeresys |
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VTIH |
Input Logic Threshold High |
VCC = 3.3V |
2 |
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V |
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VCC = 5V |
2.4 |
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IIL |
Input Leakage Current |
T-IN |
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± 0.01 |
± 1 |
μA |
TRANSMITTER ELECTRICAL CHARACTERISTICS
(C1 - C4 = 0.1μF tested at VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C)
Symbol |
Parameter |
Test Conditions |
Min. |
Typ. |
Max. |
Unit |
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VTOUT |
Output Voltage Swing |
All Transmitter outputs are loaded with |
± 5 |
± 5.4 |
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V |
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3KΩ to GND |
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RTOUT |
Transmitter Output |
VCC = V+ = V- = 0V |
VOUT = ± 2V |
300 |
10M |
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Ω |
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Resistance |
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ITSC |
Output Short Circuit |
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± 60 |
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mA |
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Current |
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ITOL |
Output Leakage Current |
VCC = 0V or 3V to 5.5V |
VOUT = ± 12V |
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± 25 |
μA |
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Transmitters Disable |
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3/16
ST3232E
RECEIVER ELECTRICAL CHARACTERISTICS
(C1 - C4 = 0.1μF tested at VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C)
Symbol |
Parameter |
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Test Conditions |
Min. |
Typ. |
Max. |
Unit |
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VRIN |
Receiver Input Voltage |
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-25 |
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25 |
V |
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Operating Range |
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VRIL |
RS-232 Input Threshold |
TA = 25°C |
V CC = 3.3V |
0.6 |
1.1 |
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V |
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Low |
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TA = 25°C |
V CC = 5V |
0.8 |
1.5 |
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VRIH |
RS-232 Input Threshold |
TA = 25°C |
V CC = 3.3V |
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1.4 |
2.4 |
V |
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High |
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TA = 25°C |
V CC = 5V |
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1.8 |
2.4 |
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VRIHYS |
Input Hysteresis |
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0.5 |
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V |
RRIN |
Input Resistance |
TA = 25°C |
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3 |
5 |
7 |
K Ω |
VROL |
TTL/CMOS Output Voltage |
IOUT = 1.6mA |
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0.4 |
V |
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Low |
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VROH |
TTL/CMOS Output Voltage |
IOUT = -1mA |
VCC-0.6 |
VCC-0.1 |
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V |
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High |
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TIMING CHARACTERISTICS
(C1 - C4 = 0.1μF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C)
Symbol |
Parameter |
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Test Conditions |
Min. |
Typ. |
Max. |
Unit |
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DR |
Data Transfer Rate |
RL = 3KΩ |
CL2= 1000pF |
250 |
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Kbps |
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one trasmitter switching |
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tPHLR |
Propagation Delay Input to |
RXIN = RXOUT |
CL = 150pF |
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0.15 |
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μs |
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tPLHR |
Output |
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tOER |
Receiver Output Enable |
Normal Operation |
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50 |
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ns |
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Time |
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tODR |
Receiver Output Disable |
Normal Operation |
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50 |
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ns |
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Time |
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|tPHLT |
Transmitter Propagation |
(Note 1) |
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200 |
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ns |
- tTHL| |
Delay Difference |
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|tPHLR |
Receiver Propagation Delay |
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50 |
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ns |
- tTHR| |
Difference |
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SRT |
Trnasition Slew Rate |
TA = 25°C |
R L = 3KΩ to 7KΩ VCC = 3.3V |
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measured from +3V to -3V or -3V to +3V |
6 |
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30 |
V/μs |
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CL = 150pF to 1000pF |
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CL = 150pF to 2500pF |
4 |
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30 |
V/μs |
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Transmitter Skew is measured at the transmitter zero cross points |
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4/16
ST3232E
APPLICATION CIRCUITS
CAPACITANCE VALUE (μF)
VCC |
C1 |
C2 |
C3 |
C4 |
Cbypass |
3.0 to 3.6 |
0.1 |
0.1 |
0.1 |
0.1 |
0.1 |
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4.5 to 5.5 |
0.047 |
0.33 |
0.33 |
0.33 |
0.1 |
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3.0 to 5.5 |
0.1 |
0.47 |
0.47 |
0.47 |
0.1 |
5/16