SN65C3223E, SN75C3223E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS
WITH ±15-kV ESD PROTECTION
www.ti.com
SLLS727A–MAY 2006–REVISED JULY 2006
FEATURES
DB, DW, OR PW PACKAGE
•
ESD Protection for RS-232 Bus Pins
(TOP VIEW)
– ±15-kV Human-Body Model (HBM)
EN
C1+
1
2
3
4
5
6
7
8
9
10
20 FORCEOFF
– ±8-kV IEC 61000-4-2, Contact Discharge
– ±15-kV IEC 61000-4-2, Air-Gap Discharge
19
18
17
16
15
14
13
12
11
V
CC
V+
C1−
C2+
C2−
GND
DOUT1
RIN1
ROUT1
FORCEON
DIN1
•
Meet or Exceed the Requirements of
TIA/EIA-232-F and ITU v.28 Standards
•
•
•
•
•
•
Operate With 3-V to 5.5-V VCC Supply
Operate up to 1000 kbit/s
V−
DOUT2
RIN2
ROUT2
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
DIN2
INVALID
RHL PACKAGE
(TOP VIEW)
APPLICATIONS
•
•
•
•
•
•
Battery-Powered Systems
PDAs
Notebooks
Laptops
Palmtop PCs
Hand-Held Equipment
1
24
C1+
NC
V+
C1–
C2+
V
CC
2
23
22
21
20
19
18
17
16
15
14
NC
3
4
GND
DOUT1
RIN1
ROUT1
FORCEON
DIN1
DESCRIPTION/ORDERING
INFORMATION
5
6
The SN65C3223E and SN75C3223E consist of two
line drivers, two line receivers, and
7
C2–
V–
a
dual
8
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.
9
DOUT2
NC
RIN2
10
11
NC
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.
Copyright © 2006, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.