TRS3222E Datasheet, PDF (1/17 Pages) Texas Instruments – 3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER WITH ±15-kV ESD PROTECTION

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TRS3222E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
WITH ±15-kV ESD PROTECTION
SLLS793 – JUNE 2007
FEATURES
• 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 the Requirements of
TIA/EIA-232-F and ITU v.28 Standards
• Operates With 3-V to 5.5-V V_CC Supply
• Operates up to 500 kbit/s
• Two Drivers and Two Receivers
• Low Standby Current . . . 1 μA Typ
• External Capacitors . . . 4 × 0.1 μF
• Accepts 5-V Logic Input With 3.3-V Supply
• Alternative High-Speed Pin-Compatible Device
(1 Mbit/s) for TRS3222E
DB, DW, OR PW PACKAGE
(TOP VIEW)
EN 1
C1+ 2
V+ 3
C1− 4
C2+ 5
C2− 6
V− 7
DOUT2 ⁸
RIN2 ⁹
ROUT2 ¹⁰
20 PWRDOWN
19 V_CC
18 GND
17 DOUT1
16 RIN1
15 ROUT1
14 N.C.
13 _DIN1
12 _DIN2
11 _N.C.
N.C. − No internal connection
RHL PACKAGE
(TOP VIEW)
APPLICATIONS
• Battery-Powered Systems
• PDAs
• Notebooks
• Laptops
• Palmtop PCs
• Hand-Held Equipment
DESCRIPTION/ORDERING
INFORMATION
The TRS3222E consists of two line drivers, two 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. The device operates at
typical data signaling rates up to 500 kbit/s and a
maximum of 30-V/μs driver output slew rate.
1
C1+ 2
N.C. 3
V+ 4
C1– 5
C2+ 6
C2– 7
V– 8
DOUT2 9
N.C. 10
RIN2 11
12
24
23
22
21
20
19
18
17
16
15
14
13
V_CC
N.C.
GND
DOUT1
RIN1
ROUT1
N.C.
DIN1
N.C.
DIN2
N.C. − No internal connection
The TRS3222E can be placed in the power-down mode by setting the power-down (PWRDOWN) input low,
which draws only 1 μA from the power supply. When the device is powered down, the receivers remain active
while the drivers are placed in the high-impedance state. Also, during power down, 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.
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