TRS3243E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
WITH ±15-kV IEC ESD PROTECTION
www.ti.com
SLLS789–APRIL 2007
FEATURES
DB, DW, OR PW PACKAGE
•
Single-Chip and Single-Supply Interface for
(TOP VIEW)
IBM™ PC/AT™ Serial Port
C2+
C2−
V−
C1+
V+
1
28
27
26
25
24
23
22
21
20
19
18
17
•
ESD Protection for RS-232 Bus Pins
2
–
–
–
±15-kV Human-Body Model (HBM)
V
CC
3
±8-kV IEC61000-4-2, Contact Discharge
±15-kV IEC61000-4-2, Air-Gap Discharge
RIN1
RIN2
GND
C1−
4
5
•
Meets or Exceeds Requirements of
TIA/EIA-232-F and ITU v.28 Standards
RIN3
FORCEON
FORCEOFF
INVALID
ROUT2B
ROUT1
ROUT2
ROUT3
6
RIN4
RIN5
7
•
•
Operates With 3-V to 5.5-V VCC Supply
8
DOUT1
DOUT2
DOUT3
DIN3
9
Always-Active Noninverting Receiver Output
(ROUT2B)
10
11
12
•
Designed to Transmit at a Data Rate up to
500 kbit/s
DIN2 13
14
16 ROUT4
15
•
•
•
•
Low Standby Current . . . 1 µA Typ
External Capacitors . . . 4 × 0.1 µF
Accepts 5-V Logic Input With 3.3-V Supply
DIN1
ROUT5
QFN PACKAGE
(TOP VIEW)
Designed to Be Interchangeable With Industry
Standard '3243E Devices
•
•
Serial-Mouse Driveability
Auto-Powerdown Feature to Disable Driver
Outputs When No Valid RS-232 Signal Is
Sensed
32 31 30 29 28 27 26 25
RIN1
RIN2
GND
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
C1–
•
Package Options Include Plastic Small-Outline
(DW), Shrink Small-Outline (DB), and Thin
Shrink Small-Outline (PW) Packages
RIN3
FORCEON
FORCEOFF
INVALID
ROUTB2
ROUT1
ROUT2
RIN4
RIN5
APPLICATIONS
DOUT1
DOUT2
DOUT3
•
•
•
•
•
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Battery-Powered Systems
PDAs
Notebooks
Laptops
Palmtop PCs
Hand-Held Equipment
9
10 11 12 13 14 15 16
N.C. − Not internally connected
DESCRIPTION/ORDERING INFORMATION
The TRS3243E device consists of three line drivers, five line receivers, and a dual charge-pump circuit with
±15-kV ESD (HBM and IEC61000-4-2, Air-Gap Discharge) and ±8-kV ESD (IEC61000-4-2, Contact Discharge)
protection on serial-port connection pins. The device meets the requirements of TIA/EIA-232-F and provides the
electrical interface between an asynchronous communication controller and the serial-port connector. This
combination of drivers and receivers matches that needed for the typical serial port used in an IBM PC/AT, or
compatible. 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 (ROUT2B), which allows
applications using the ring indicator to transmit data while the device is powered down. The 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.
IBM, PC/AT are trademarks of International Business Machines Corporation.
PRODUCTION DATA information is current as of publication date.
Copyright © 2007, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.