TRSF3222E Datasheet, PDF (1/19 Pages) Texas Instruments – 3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER WITH ±15-kV ESD PROTECTION

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TRSF3222E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
WITH ±15-kV ESD PROTECTION
SLLS823 – JULY 2007
FEATURES
• ESD Protection for RS-232 Bus Pins
– ±15-kV Human-Body Model (HBM)
– ±8-kV IEC 61000-4-2, Contact Discharge
– ±15-kV IEC 61000-4-2, 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 1000 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
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 NC
13 _DIN1
12 _DIN2
11 _NC
NC − No internal connection
APPLICATIONS
• Battery-Powered Systems
• PDAs
• Notebooks
• Laptops
• Palmtop PCs
• Hand-Held Equipment
DESCRIPTION/
ORDERING INFORMATION
The TRSF3222E 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 TRSF3222E 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 TRSF3222E
operates at typical data signaling rates up to
1000 kbit/s and is an improved drop-in replacement
for industry-popular '3222 two-driver, two-receiver
functions.
RHL PACKAGE
(TOP VIEW)
1
C1+ 2
NC 3
V+ 4
C1– 5
C2+ 6
C2– 7
V– 8
DOUT2 9
NC 10
RIN2 11
12
24
23
22
21
20
19
18
17
16
15
14
13
V_CC
NC
GND
DOUT1
RIN1
ROUT1
NC
DIN1
NC
DIN2
NC − No internal connection
The TRSF3222E 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.
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