SN65C3223E_07 Datasheet, PDF (1/20 Pages) Texas Instruments – 3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS WITH ±15-kV ESD PROTECTION

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SN65C3223E, SN75C3223E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS
WITH ±15-kV ESD PROTECTION
SLLS727A – MAY 2006 – REVISED JULY 2006
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
• Meet or Exceed the Requirements of
TIA/EIA-232-F and ITU v.28 Standards
• Operate With 3-V to 5.5-V V_CC Supply
• Operate 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
APPLICATIONS
• Battery-Powered Systems
• PDAs
• Notebooks
• Laptops
• Palmtop PCs
• Hand-Held Equipment
DESCRIPTION/ORDERING
INFORMATION
The SN65C3223E and SN75C3223E consist 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).
These devices meet the requirements of
TIA/EIA-232-F and provide 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 devices operate at
typical data signaling rates up to 1000 kbit/s.
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)
C1+ 2
NC 3
V+ 4
C1– 5
C2+ 6
C2– 7
V– 8
DOUT2 9
NC ¹⁰
RIN2 ¹¹
1 24
23 V_CC
22 NC
21 GND
20 DOUT1
19 RIN1
18 ROUT1
17 FORCEON
16 DIN1
15 _NC
14 _DIN2
12 13
NC − 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 devices do 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 devices are 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.
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 © 2006, Texas Instruments Incorporated