TRS3243E_08 Datasheet, PDF (1/26 Pages) Texas Instruments – 3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER WITH ±15-kV IEC ESD PROTECTION

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TRS3243E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
WITH ±15-kV IEC ESD PROTECTION
SLLS789 – APRIL 2007
FEATURES
• Single-Chip and Single-Supply Interface for
IBM™ PC/AT™ Serial Port
• ESD Protection for RS-232 Bus Pins
– ±15-kV Human-Body Model (HBM)
– ±8-kV IEC61000-4-2, Contact Discharge
– ±15-kV IEC61000-4-2, Air-Gap Discharge
• Meets or Exceeds Requirements of
TIA/EIA-232-F and ITU v.28 Standards
• Operates With 3-V to 5.5-V V_CC Supply
• Always-Active Noninverting Receiver Output
(ROUT2B)
• Designed to Transmit at a Data Rate up to
500 kbit/s
• Low Standby Current . . . 1 µA Typ
• External Capacitors . . . 4 × 0.1 µF
• Accepts 5-V Logic Input With 3.3-V Supply
• 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
• Package Options Include Plastic Small-Outline
(DW), Shrink Small-Outline (DB), and Thin
Shrink Small-Outline (PW) Packages
APPLICATIONS
• Battery-Powered Systems
• PDAs
• Notebooks
• Laptops
• Palmtop PCs
• Hand-Held Equipment
DB, DW, OR PW PACKAGE
(TOP VIEW)
C2+ ₁
C2− 2
V− 3
RIN1 4
RIN2 5
RIN3 6
RIN4 7
RIN5 8
DOUT1 9
DOUT2 10
DOUT3 11
DIN3 12
DIN2 13
DIN1 14
28 ^C1+
27 V+
26 VCC
25 GND
24 C1−
23 FORCEON
22 FORCEOFF
21 INVALID
20 ROUT2B
19 ROUT1
18 ROUT2
17 ROUT3
16 ROUT4
15 ROUT5
QFN PACKAGE
(TOP VIEW)
RIN1
RIN2
RIN3
RIN4
RIN5
DOUT1
DOUT2
DOUT3
32 31 30 29 28 27 26 25
1
24
2
23
3
22
4
21
5
20
6
19
7
18
8
17
9 10 11 12 13 14 15 16
GND
C1–
FORCEON
FORCEOFF
INVALID
ROUTB2
ROUT1
ROUT2
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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2007, Texas Instruments Incorporated