± 15 kV ESD protection 3 to 5.5 V low power,
up to 250 kbps, RS-232 drivers and receivers
Features
■ ESD protection for RS-232 I/O pins
■ ±15 kV human body model
■ ±8 kV IEC 1000-4-2 contact discharge
■ 300 µA supply current
■ 250 kbps minimum guaranteed data rate
■ 6 V/µs minimum guaranteed slew rate
■ Meet EIA/TIA-232 specifications down to 3 V
■ Available in SO-16, SO-16 large and TSSOP16
SO-16
ST3232EB
ST3232EC
SO-16 Large
Applications
■ Notebook, subnotebook and palmtop
computers
■ Battery powered equipment
■ Hand-held equipment
■ Peripherals and printers
small 0.1 µF standard external capacitors for
operations from 3 V supply.
The ST3232E has two receivers and two drivers.
The device is guaranteed to run at data rates of
250 kbps while maintaining RS-232 output levels.
TSSOP16
Description
The ST3232E is a 3 V 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 ± 8 kV using IEC1000-4-2 contact
discharge and ± 15 kV using the human body
model. ST3232E has a proprietary low dropout
transmitter output stage providing true RS-232
performance from 3 to 5 V supplies with a dual
charge pump. The charge pump requires only four
Table 1. Device summary
Order codes Temperature range Packages Packaging
ST3232ECDR 0 to 70 °C SO-16 (tape and reel) 2500 parts per reel
ST3232EBDR -40 to 85 °C SO-16 (tape and reel) 2500 parts per reel
ST3232ECTR 0 to 70 °C TSSOP16 (tape and reel) 2500 parts per reel
ST3232EBTR -40 to 85 °C TSSOP16 (tape and reel) 2500 parts per reel
January 2010 Doc ID 8784 Rev 6 1/17
www.st.com
17
Contents ST3232EB, ST3232EC
Contents
1 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2/17 Doc ID 8784 Rev 6
ST3232EB, ST3232EC Pin configuration
1 Pin configuration
Figure 1. Pin connection
Table 2. Pin description
Pin n° Symbol Name and function
1C
+ Positive terminal for the first charge pump capacitor
1
2 V+ Doubled voltage terminal
3C
4C
5C
- Negative Terminal for the first charge pump capacitor
1
+ Positive terminal for the second charge pump capacitor
2
- Negative terminal for the second charge pump capacitor
2
6 V- Inverted voltage terminal
7T2
8R2
9R2
10 T2
11 T1
12 R1
13 R1
14 T1
OUT
IN
OUT
IN
IN
OUT
IN
OUT
Second transmitter output voltage
Second receiver input voltage
Second receiver output voltage
Second transmitter input voltage
First transmitter input voltage
First receiver output voltage
First receiver input voltage
First transmitter output voltage
15 GND Ground
16 V
CC
Supply voltage
Doc ID 8784 Rev 6 3/17
Absolute maximum ratings ST3232EB, ST3232EC
2 Absolute maximum ratings
Table 3. Absolute maximum ratings
Symbol Parameter Value Unit
V
CC
V+ Doubled voltage terminal (V
V- Inverted voltage terminal 0.3 to -7 V
V+ +|V-| 13 V
T
IN
R
IN
T
OUT
R
OUT
t
SHORT
Supply voltage -0.3 to 6 V
- 0.3) to 7 V
CC
Transmitter input voltage range -0.3 to 6 V
Receiver input voltage range ± 25 V
Transmitter output voltage range ± 13.2 V
Receiver output voltage range -0.3 to (VCC + 0.3) V
Transmitter output short to gnd time Continuous
Note: Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these condition is not implied.
Externally applied V+ and V- can have a maximum magnitude of +7 V, but their absolute
addition can not exceed 13 V.
Running on internal charge pump, intrinsic self limitation allows exceeding those values
without any damage.
Startup voltage sequence (V
, then V+, then V-) is critical, therefore it is not recommended
CC
to use this device using externally applied voltage to V+ and V-.
Figure 2. ESD performance: transmitter outputs, receiver inputs
Symbol Parameter Test conditions Min. Typ. Max. Unit
ESD ESD protection voltage Human body model ±15 kV
ESD ESD protection voltage IEC-1000-4-2 ±8kV
4/17 Doc ID 8784 Rev 6
ST3232EB, ST3232EC Electrical characteristics
3 Electrical characteristics
C1 - C4 = 0.1 µF, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless otherwise specified. Typical
values are referred to T
Table 4. Electrical characteristics
Symbol Parameter Test conditions Min. Typ. Max. Unit
= 25 °C.
A
I
SUPPLYVCC
Power supply current No Load, VCC = 3V or 5V, TA = 25°C 0.3 1 mA
C1 - C4 = 0.1 µF, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless otherwise specified. Typical
values are referred to T
TIL
TIH
IL
Input logic threshold low T-IN 0.8 V
Transmitter input hysteresis 0.25 V
Input logic threshold high
Input leakage current T-IN ± 0.01 ± 1µA
Table 5. Logic input
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
V
HYS
V
I
= 25 °C.
A
V
= 3.3V 2
CC
= 5V 2.4
V
CC
C1 - C4 = 0.1 µF tested at 3.3 V ± 10 %, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless
otherwise specified. Typical values are referred to T
Table 6. Transmitter
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
TOUT
R
TOUT
I
SC
I
TOL
Output voltage swing
Transmitter output
resistance
All transmitter outputs are loaded with
3kΩ to GND
V
CC
= 0V, V
= ± 2V 300 10M Ω
OUT
Output short circuit current ± 60 mA
V
= 0V or 3.3V to 5.5V
Output leakage current
V
CC
OUT
= ± 12V
Transmitters disable
= 25 °C.
A
± 5 ± 5.4 V
± 25 µA
V
Doc ID 8784 Rev 6 5/17
Electrical characteristics ST3232EB, ST3232EC
C1 - C4 = 0.1 µF tested at 3.3 V ± 10 %, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless
otherwise specified. Typical values are referred to T
Table 7. Receiver
Symbol Parameter Test conditions Min. Typ. Max. Unit
= 25 °C.
A
V
RIN
V
Receiver input voltage operating
range
RS-232 Input threshold low
RIL
-25 25 V
T
= 25°C, VCC = 3.3V 0.6 1.1
A
= 25°C, VCC = 5V 0.8 1.5
T
A
TA = 25°C, VCC = 3.3V 1.4 2.4
V
V
RIHYS
R
V
V
RIH
RIN
ROL
ROH
RS-232 Input threshold high
= 25°C, VCC = 5V 1.8 2.4
T
A
Input hysteresis 0.5 V
Input resistance TA = 25°C 3 5 7 kΩ
TTL/CMOS Output voltage low I
TTL/CMOS Output voltage high I
= 1.6mA 0.4 V
OUT
= -1mA VCC-0.6 VCC-0.1 V
OUT
C1 - C4 = 0.1 µF tested at 3.3 V ± 10 %, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless
otherwise specified. Typical values are referred to T
Table 8. Timing characteristics
Symbol Parameter Test conditions Min. Typ. Max. Unit
D
R
t
PHLR
tPLHR
t
OER
t
ODR
|t
PHLT
- t
THL
|t
PHLR
- t
THR
S
RT
1. Transmitter skew is measured at the transmitter zero cross points.
R
= 3KΩ, CL2= 1000pF
Data transfer rate
Propagation delay input to
output
L
one transmitter switching
= R
R
XIN
, CL = 150pF 0.15 µs
XOUT
Receiver output enable time Normal Operation 50 ns
Receiver output disable time Normal Operation 50 ns
Transmitter propagation
|
delay difference
(1)
Receiver propagation delay
|
difference
= 25°C RL = 3kΩ to 7kΩ VCC = 3.3V
T
A
Transition slew rate
measured from +3V to -3V or -3V to +3V
= 150pF to 1000pF
C
L
CL = 150pF to 2500pF
= 25 °C
A
250 kbps
200 ns
50 ns
6
3030V/µs
4
V
V
V/µs
6/17 Doc ID 8784 Rev 6
ST3232EB, ST3232EC Application
4 Application
Figure 3. Application circuits
Table 9. Capacitance value (µF)
V
CC
C1 C2 C3 C4 Cbypass
3.0 to 3.6 0.1 0.1 0.1 0.1 0.1
4.5 to 5.5 0.047 0.33 0.33 0.33 0.1
3.0 to 5.5 0.1 0.47 0.47 0.47 0.1
Doc ID 8784 Rev 6 7/17
Typical performance characteristics ST3232EB, ST3232EC
5 Typical performance characteristics
Unless otherwise specified TJ = 25 °C.
Figure 4. Output current vs. output high
voltage
Figure 5. Output current vs. output high
voltage
Figure 6. Output current vs. output low
voltage
Figure 8. Voltage transfer characteristics for
transmitter inputs
Figure 7. Output current vs. output low
voltage
Figure 9. Receiver input resistance
8/17 Doc ID 8784 Rev 6
ST3232EB, ST3232EC Package mechanical data
6 Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK
®
packages, depending on their level of environmental compliance. ECOPACK®
®
is an ST trademark.
Doc ID 8784 Rev 6 9/17
Package mechanical data ST3232EB, ST3232EC
SO-16 mechanical data
Dim.
A 1.75 0.068
a1 0.1 0.25 0.004 0.010
a2 1.64 0.063
b 0.3 5 0.46 0.013 0.018
b1 0.19 0.25 0.007 0.010
C 0.5 0.019
c1 45° (typ.)
D 9.8 10 0.3850.393
E5.8 6.2 0.228 0.244
e 1.27 0.050
e38.89 0.350
F 3.8 4.0 0.149 0.157
G 4.6 5.3 0.181 0.208
L 0.5 1.27 0.019 0.050
M 0.62 0.024
S8° (max.)
Min. Typ. Max. Min. Typ. Max.
mm. inch.
10/17 Doc ID 8784 Rev 6
0016020D
ST3232EB, ST3232EC Package mechanical data
SO-16L mechanical data
Dim.
A 2.65 0.104
a1 0.1 0.2 0.004 0.008
a2 2.45 0.096
b 0.3 50.49 0.014 0.019
b1 0.23 0.32 0.009 0.012
C 0.5 0.020
c1 45° (typ.)
D 10.1 10.5 0.397 0.413
E 10.0 10.65 0.393 0.419
e 1.27 0.050
e38.89 0.350
F 7.4 7.6 0.2910.300
G
L 0.5 1.27 0.020 0.050
M 0.75 0.029
S8° (max.)
Min. Typ. Max. Min. Typ. Max.
mm. inch.
PO13I
Doc ID 8784 Rev 6 11/17
Package mechanical data ST3232EB, ST3232EC
TSSOP16 mechanical data
mm. inch.
Dim.
Min. Typ. Max. Min. Typ. Max.
A 1.2 0.047
A1 0.05 0.15 0.002 0.004 0.006
A2 0.8 1 1.05 0.031 0.039 0.041
b 0.19 0.30 0.007 0.012
c0.09 0.20 0.004 0.0079
D4.9 5 5.1 0.193 0.197 0.201
E 6.2 6.4 6.6 0.244 0.252 0.260
E1 4.3 4.4 4.48 0.169 0.173 0.176
e 0.65 BSC 0.0256 BSC
K0° 8°0° 8°
L 0.45 0.60 0.75 0.018 0.024 0.030
A2
A
A1
b
e
c
K
L
E
D
E1
PIN 1 IDENTIFICATION
1
12/17 Doc ID 8784 Rev 6
0080338D
ST3232EB, ST3232EC Package mechanical data
Tape & reel SO-16 mechanical data
mm. inch.
Dim.
Min. Typ. Max. Min. Typ. Max.
A 330 12.992
C 12.8 13.2 0.504 0.519
D 20.2 0.795
N60 2.362
T 22.4 0.882
Ao 6.45 6.65 0.254 0.262
Bo 10.3 10.5 0.406 0.414
Ko 2.1 2.3 0.082 0.090
Po 3.9 4.1 0.153 0.161
P7.98.1 0.311 0.319
Doc ID 8784 Rev 6 13/17
Package mechanical data ST3232EB, ST3232EC
Tape & reel SO-16L mechanical data
mm. inch.
Dim.
Min. Typ. Max. Min. Typ. Max.
A 330 12.992
C 12.8 13.2 0.504 0.519
D 20.2 0.795
N60 2.362
T 22.4 0.882
Ao 10.8 11.0 0.425 0.433
Bo 10.7 10.9 0.421 0.429
Ko 2.93.1 0.114 0.122
Po 3.9 4.1 0.153 0.161
P 11.9 12.1 0.468 0.476
14/17 Doc ID 8784 Rev 6
ST3232EB, ST3232EC Package mechanical data
Tape & reel TSSOP16 mechanical data
mm. inch.
Dim.
Min. Typ. Max. Min. Typ. Max.
A 330 12.992
C 12.8 13.2 0.504 0.519
D 20.2 0.795
N60 2.362
T 22.4 0.882
Ao 6.7 6.9 0.264 0.272
Bo 5.3 5.5 0.209 0.217
Ko 1.6 1.8 0.063 0.071
Po 3.9 4.1 0.153 0.161
P7.98.1 0.311 0.319
Doc ID 8784 Rev 6 15/17
Revision history ST3232EB, ST3232EC
7 Revision history
Table 10. Document revision history
Date Revision Changes
06-Sep-2006 3 Order codes updated.
21-Jan-2008 4 Added: Ta b le 1 and note on Ta bl e 3 .
08-Feb-2008 5 Modified: Table 1 on page 1.
05-Jan-2010 6 Modified: Table 1 on page 1.
16/17 Doc ID 8784 Rev 6
ST3232EB, ST3232EC
Please Read Carefully:
Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the
right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any
time, without notice.
All ST products are sold pursuant to ST’s terms and conditions of sale.
Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no
liability whatsoever relating to the choice, selection or use of the ST products and services described herein.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this
document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products
or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such
third party products or services or any intellectual property contained therein.
UNLESS OTHERWISE SET FORTH IN ST’S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED
WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS
OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT.
UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZED ST REPRESENTATIVE, ST PRODUCTS ARE NOT
RECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING
APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY,
DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE
GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER’S OWN RISK.
Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void
any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any
liability of ST.
ST and the ST logo are trademarks or registered trademarks of ST in various countries.
Information in this document supersedes and replaces all information previously supplied.
The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners.
© 2010 STMicroelectronics - All rights reserved
STMicroelectronics group of companies
Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan -
Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America
www.st.com
Doc ID 8784 Rev 6 17/17
Loading...