Texas Instruments TRS3237E Data Handbook/Manual

TRS3237E

3-V TO 5.5-V MULTICHANNEL RS-232

1-MBit/s LINE DRIVER/RECEIVER

www.ti.com

SLLS796–JUNE

FEATURES

Meets or Exceeds the Requirements of ESD Protection for RS-232 I/O Pins and Logic

TIA/EIA-232-F and ITU v.28 Standards Input pins

Operates With 3-V to 5.5-V VCC Supply ±15 k V Human-Body Model (HBM)

Operates From kbits/s to Mbit/s ±8 k V IEC61000-4-2, Contact Discharge

Low Standby Current μA Typical ±15 k V IEC61000-4-2, Air-Gap Discharge

External Capacitors 0.1 μF

APPLICATIONS

Accepts 5-V Logic Input With 3.3-V Supply

Battery-Powered, Hand-Held, and Portable•

Designed to Be Interchangeable With Industry

Equipment

Standard '3237E Devices

PDAs and Palmtop PCs

Latch-Up Performance Exceeds m A Per

Notebooks, Sub-Notebooks, and Laptops

JESD 78, Class II

Digital Cameras

Mobile Phones and Wireless Devices

DB, DW, OR PW PACKAGE RHB PACKAGE (TOP VIEW) (TOP VIEW)

C2+ C1+ GND V+ C2− VCC V− C1−

DOUT1 C1–

DOUT1 DIN1

DOUT2 DIN1

DOUT2 DIN2

DOUT3 IN2 DOUT3 DIN3 2– RIN1 DIN3

RIN1 ROUT1

RIN2 ROUT1 2+

RIN2 ROUT2 DOUT4 ROUT2

DOUT4 DIN4 RIN3 DIN4

RIN3 ROUT3 N.C. ROUT3

DOUT5 DIN5

EN ROUT1B SHDN MBAUD

N.C.– Not internally connected

DESCRIPTION/ORDERING INFORMATION

The TRS3237E consists of five line drivers, three line receivers, and dual charge-pump circuit with ±15-k V

ESD protection pin to pin (serial-port connection pins, including GND). 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. The charge pump and four small external capacitors allow operation from single 3-V to

5.5-V supply. This device operates at data signaling rates of kbit/s in normal operating mode

(MBAUD GND) and 1Mbit/s when MBAUD VCC. The driver output slew rate is maximum of V/μs.

The TRS3237E transmitters are disabled and the outputs are forced into high-impedance state when the device

is in shutdown mode (SHDN GND) and the supply current falls to less than μA. Also, during shutdown, the

onboard charge pump is disabled; V+ is lowered to VCC, and V– is raised toward GND. Receiver outputs also

can be placed in the high-impedance state by setting enable (EN) high. ROUT1B remains active all the time,

regardless of the EN and SHDN condition.

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.