TRS3223E 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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TRS3223E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
WITH ±15-kV ESD PROTECTION
SLLS794 – 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 TRSF3223E
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 FORCEOFF
19 V_CC
18 GND
17 DOUT1
16 RIN1
15 ROUT1
14 FORCEON
13 _DIN1
12 _DIN2
11 _INVALID
RHL PACKAGE
(TOP VIEW)
APPLICATIONS
• Battery-Powered Systems
• PDAs
• Notebooks
• Laptops
• Palmtop PCs
• Hand-Held Equipment
DESCRIPTION/
ORDERING INFORMATION
The TRS3223E 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.
C1+ 2
N.C. 3
V+ 4
C1– 5
C2+ 6
C2– 7
V– 8
DOUT2 9
N.C. ¹⁰
RIN2 ¹¹
1 24
23 V_CC
22 N.C.
21 GND
20 DOUT1
19 RIN1
18 ROUT1
17 FORCEON
16 DIN1
15 _N.C.
14 _DIN2
12 13
N.C. − No internal connection
Flexible control options for power management are available when the serial port is inactive. The
auto-powerdown feature functions when FORCEON is low and FORCEOFF is high. During this mode of
operation, if the device does not sense a valid RS-232 signal, the driver outputs are disabled. If FORCEOFF is
set low and EN is high, both drivers and receivers are shut off, and the supply current is reduced to 1 mA.
Disconnecting the serial port or turning off the peripheral drivers causes auto-powerdown to occur.
Auto-powerdown can be disabled when FORCEON and FORCEOFF are high. With auto-powerdown enabled,
the device is activated automatically when a valid signal is applied to any receiver input. The INVALID output is
used to notify the user if an RS-232 signal is present at any receiver input. INVALID is high (valid data) if any
receiver input voltage is greater than 2.7 V or less than –2.7 V, or has been between –0.3 V and 0.3 V for less
than 30 μs. INVALID is low (invalid data) if the receiver input voltage is between –0.3 V and 0.3 V for more than
30 μs. Refer to Figure 4 for receiver input levels.
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