TRSF23243 Datasheet, PDF (1/17 Pages) Texas Instruments – 3-V TO 5.5-V DUAL RS-232 PORT

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FEATURES
• Single-Chip and Single-Supply Interface for
Two IBM PC/AT Serial Ports
• Meets or Exceeds the 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
(ROUT2) Per Port
• Operates Up To 250 kbit/s
• Low Standby Current . . . 1 μA Typical
• External Capacitors . . . 4 × 0.22 μF
• Accepts 5-V Logic Input With 3.3-V Supply
• Allows for Flexible Power Down of Either
Serial Port
• Serial-Mouse Driveability
• RS-232 Bus-Pin ESD Protection Exceeds
±15 kV Using Human-Body Model (HBM)
APPLICATIONS
• Battery-Powered Systems
• Notebooks
• Laptops
• Palmtop PCs
• Hand-Held Equipment
TRSF23243
3-V TO 5.5-V DUAL RS-232 PORT
SLLS855 – AUGUST 2007
DESCRIPTION/ORDERING INFORMATION
The TRSF23243 consists of two ports, each containing three line drivers and five line receivers, and a dual
charge-pump circuit with ±15-kV ESD protection pin to pin (serial-port connection pins, including GND). This
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 two typical serial ports 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, this device includes an
always-active noninverting output (ROUT2) per port, 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.
T_A
0°C to 70°C
–40°C to 85°C
ORDERING INFORMATION
PACKAGE ^{(1) (2)}
ORDERABLE PART NUMBER
SSOP – DL
Tube of 25
Reel of 1000
TRSF23243CDL
TRSF23243CDLR
TSSOP – DGG
Reel of 2000
TRSF23243CDGGR
SSOP – DL
Tube of 25
Reel of 1000
TRSF23243IDL
TRSF23243IDLR
TSSOP – DGG
Reel of 2000
TRSF23243IDGGR
TOP-SIDE MARKING
TRSF23243C
TRSF23243C
TRSF23243I
TRSF23243I
(1) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
(2) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
website at www.ti.com.
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.
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