TRSF3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
WITH ±15-kV ESD (HBM) PROTECTION
www.ti.com
SLLS826–AUGUST 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
C2−
C1+
27 V+
26
1
28
•
Meets or Exceeds the Requirements of
TIA/EIA-232-F and ITU v.28 Standards
2
3
V
CC
•
•
•
•
Operates With 3-V to 5.5-V VCC Supply
Operates up to 1000 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
DOUT4
RIN3
•
•
•
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Low Standby Current . . . 1 μA Typical
External Capacitors . . . 4 × 0.1 μF
10
11
12
13
14
ROUT3
DIN5
Accept 5-V Logic Input With 3.3-V Supply
DOUT5
FORCEON
FORCEOFF
Always-Active Noninverting Receiver Output
(ROUT1B)
ROUT1B
INVALID
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ESD Protection for RS-232 Interface Pins
–
–
–
±15-kV Human-Body Model (HBM)
±8-kV IEC61000-4-2, Contact Discharge
±15-kV IEC61000-4-2, Air-Gap Discharge
RHB PACKAGE
(TOP VIEW)
APPLICATIONS
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•
•
•
•
•
•
•
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Battery-Powered Systems
PDAs
Notebooks
Subnotebooks
Laptops
Palmtop PCs
Hand-Held Equipment
Modems
32 31 30 29 28 27 26 25
1
2
3
4
5
6
7
8
24
DOUT1
DOUT2
DOUT3
RIN1
RIN2
DOUT4
RIN3
C1–
DIN1
DIN2
DIN3
ROUT1
ROUT2
DIN4
23
22
21
20
19
18
17
Printers
NC
ROUT3
9 10 11 12 13 14 15 16
DESCRIPTION/ORDERING INFORMATION
The TRSF3238E 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. The TRSF3238E
operates at data signaling rates up to 1000 kbit/s.
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.