TRS3237E Datasheet, PDF (1/17 Pages) Texas Instruments – 3-V TO 5.5-V MULTICHANNEL RS-232 1-MBit/s LINE DRIVER/RECEIVER

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FEATURES
• 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
• Operates From 250 kbits/s to 1 Mbit/s
• Low Standby Current . . . 1 μA Typical
• External Capacitors . . . 4 × 0.1 μF
• Accepts 5-V Logic Input With 3.3-V Supply
• Designed to Be Interchangeable With Industry
Standard '3237E Devices
• Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
DB, DW, OR PW PACKAGE
(TOP VIEW)
TRS3237E
3-V TO 5.5-V MULTICHANNEL RS-232
1-MBit/s LINE DRIVER/RECEIVER
SLLS796 – JUNE 2007
• ESD Protection for RS-232 I/O Pins and Logic
Input pins
– ±15 kV – Human-Body Model (HBM)
– ±8 kV – IEC61000-4-2, Contact Discharge
– ±15 kV – IEC61000-4-2, Air-Gap Discharge
APPLICATIONS
• Battery-Powered, Hand-Held, and Portable
Equipment
• PDAs and Palmtop PCs
• Notebooks, Sub-Notebooks, and Laptops
• Digital Cameras
• Mobile Phones and Wireless Devices
RHB PACKAGE
(TOP VIEW)
C2 + ₁
GND 2
C2− 3
V− 4
DOUT1 5
DOUT2 6
DOUT3 7
RIN1 8
RIN2 9
DOUT4 10
RIN3 11
DOUT5 12
EN 13
SHDN 14
28 ^C1+
27 V+
26 VCC
25 C1−
24 DIN1
23 DIN2
22 DIN3
21 ROUT1
20 ROUT2
19 DIN4
18 ROUT3
17 DIN5
16 ROUT1B
15 MBAUD
DOUT1
DOUT2
DOUT3
RIN1
RIN2
DOUT4
RIN3
N.C.
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
C1–
DIN1
IN2
DIN3
ROUT1
ROUT2
DIN4
ROUT3
N.C.– Not internally connected
DESCRIPTION/ORDERING INFORMATION
The TRS3237E consists of five line drivers, three line receivers, and a dual charge-pump circuit with ±15-kV
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 a single 3-V to
5.5-V supply. This device operates at data signaling rates of 250 kbit/s in normal operating mode
(MBAUD = GND) and 1Mbit/s when MBAUD = V_CC. The driver output slew rate is a maximum of 30 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 1 μA. Also, during shutdown, the
onboard charge pump is disabled; V+ is lowered to V_CC, 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
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.
Copyright © 2007, Texas Instruments Incorporated