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SLLS513A − AUGUST 2001 − REVISED MARCH 2004
DGG OR DL PACKAGE
(TOP VIEW)
D
Single-Chip and Single-Supply Interface for
Two IBM PC/AT Serial Ports
D
Meet or Exceed the Requirements of
TIA/EIA-232-F and ITU v.28 Standards
1
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
RIN5A
RIN4A
RIN3A
RIN2A
RIN1A
INVA
ROUT5A
ROUT4A
ROUT3A
ROUT2A
ROUT1A
ROUT2A
DIN3A
DIN2A
DIN1A
FORCEON
V−
V+
C1+
C1−
GND
DIN1B
DIN2B
DIN3B
2
D
Operate With 3-V to 5.5-V V
Supply
CC
3
D
Always-Active Noninverting Receiver
Output (ROUT2) Per Port
4
5
6
D
D
D
D
D
Operate Up To 250 kbit/s
7
DOUT3A
DOUT2A
DOUT1A
FORCEOFFA
C2−
Low Standby Current . . . 1 µA Typical
External Capacitors . . . 4 × 0.22 µF
Accept 5-V Logic Input With 3.3-V Supply
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Allow for Flexible Power Down of Either
Serial Port
C2+
GND
D
Serial-Mouse Driveability
V
CC
D
RS-232 Bus-Pin ESD Protection Exceeds
15 kV Using Human-Body Model (HBM)
FORCEOFFB
DOUT1B
DOUT2B
DOUT3B
INVB
D
Applications
− Battery-Powered Systems, Notebooks,
Laptops, Palmtop PCs, and Hand-Held
Equipment
ROUT2B
ROUT1B
ROUT2B
ROUT3B
ROUT4B
ROUT5B
RIN1B
RIN2B
RIN3B
RIN4B
description/ordering information
The SN65C23243 and SN75C23243 consist of
two ports, each containing three line drivers and
five line receivers, and a dual charge-pump circuit
with 15-kV ESD protection pin to pin (serial-port
RIN5B
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. This
combination of drivers and receivers matches that needed for two typical serial ports used in an IBM PC/AT, or
compatible. The charge pump and four small external capacitors allow operation from a single 3-V to 5.5-V
supply. In addition, these devices include an always-active noninverting output (ROUT2) per port, which allows
applications using the ring indicator to transmit data while the devices are powered down. The devices operate
at data signaling rates up to 250 kbit/s and a maximum of 30-V/µs driver output slew-rate.
ORDERING INFORMATION
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
†
T
A
PACKAGE
Tube of 25
SN75C23243DL
SSOP (DL)
75C23243
Reel of 1000
Reel of 2000
Tube of 25
SN75C23243DLR
SN75C23243DGGR
SN65C23243DL
−0°C to 70°C
−40°C to 85°C
TSSOP (DGG)
75C23243
SSOP (DL)
65C23243
65C23243
Reel of 1000
Reel of 2000
SN65C23243DLR
SN65C23243DGGR
TSSOP (DGG)
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
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.
IBM is a trademark of International Business Machines Corporation.
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Copyright 2004, Texas Instruments Incorporated
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1
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