TRS3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
WITH ±15-kV ESD (HBM) PROTECTION
www.ti.com
SLLS797–JUNE 2007
FEATURES
DB, DW, OR PW PACKAGE
•
RS-232 Bus-Pin ESD Protection Exceeds
(TOP VIEW)
±15 kV Using Human-Body Model (HBM)
C2+
GND
C1+
27 V+
26
1
28
•
Meets or Exceeds the Requirements of
TIA/EIA-232-F and ITU v.28 Standards
2
C2-
3
V
CC
•
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Operates With 3-V to 5.5-V VCC Supply
Operates up to 400 kbit/s
V-
4
25 C1-
DOUT1
DOUT2
DOUT3
RIN1
5
24 DIN1
Five Drivers and Three Receivers
6
23
22
21
20
19
18
17
16
15
DIN2
Auto-Powerdown Plus Feature Enables
Flexible Power-Down Mode
7
DIN3
8
ROUT1
ROUT2
DIN4
9
RIN2
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•
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Low Standby Current . . . 1 μA Typical
External Capacitors . . . 4 × 0.1 μF
10
11
12
13
14
DOUT4
RIN3
ROUT3
DIN5
Accepts 5-V Logic Input With 3.3-V Supply
DOUT5
FORCEON
FORCEOFF
Always-Active Noninverting Receiver Output
(ROUT1B)
ROUT1B
INVALID
•
•
Alternative High-Speed Pin-Compatible Device
(1 Mbit/s) for TRSF3238
ESD Protection for RS-232 Interface Pins
RHB PACKAGE
(TOP VIEW)
–
–
–
±15 kV – Human-Body Model (HBM)
±8 kV – IEC61000-4-2, Contact Discharge
±15 kV – IEC61000-4-2, Air-Gap Discharge
APPLICATIONS
32 31 30 29 28 27 26 25
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•
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•
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Battery-Powered Systems
PDAs
Notebooks
Subnotebooks
Laptops
Palmtop PCs
Hand-Held Equipment
Modems
1
2
3
4
5
6
7
8
24
DOUT1
DOUT2
DOUT3
RIN1
C1–
23
22
21
20
19
18
17
DIN1
DIN2
DIN3
RIN2
ROUT1
ROUT2
DIN4
DOUT4
RIN3
N.C.
ROUT3
9 10 11 12 13 14 15 16
Printers
N.C. - Not inter nally connected
DESCRIPTION/ORDERING INFORMATION
The TRS3238E consists of five line drivers, three line receivers, and a dual charge-pump circuit with ±15-kV
ESD (HBM) protection on the driver output (DOUT) and receiver input (RIN) terminals. The device meets the
requirements of TIA/EIA-232-F and provides the electrical interface between notebook and subnotebook
computer applications. The charge pump and four small external capacitors allow operation from a single 3-V to
5.5-V supply. In addition, the device includes an always-active noninverting output (ROUT1B), which allows
applications using the ring indicator to transmit data while the device is powered down. This device operates at
data signaling rates up to 250 kbit/s and a maximum of 30-V/μs driver output slew rate.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
UNLESS OTHERWISE NOTED this document contains
Copyright © 2007, Texas Instruments Incorporated
PRODUCTION DATA information current as of publication date.
Products conform to specifications per the terms of Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.