ꢀ ꢁꢂ ꢃ ꢄꢅ ꢃ
ꢃ ꢆꢇ ꢈ ꢉ ꢊ ꢋꢊ ꢆꢇ ꢀ ꢌꢍꢈ ꢎꢏꢐ ꢁꢑꢑꢒꢍ ꢓꢔ ꢆꢄꢃ ꢄ ꢍ ꢎꢑꢒ ꢕꢓꢎ ꢇꢒ ꢓꢖꢓꢒ ꢏꢒ ꢎ ꢇ ꢒꢓ
ꢗ ꢎꢈ ꢐ ꢘ ꢊ ꢆꢙ ꢇ ꢒꢔ ꢕ ꢚꢐꢛꢀ ꢜ ꢝꢓ ꢉ ꢈꢒ ꢏꢈ ꢎꢉ ꢑ
ꢞ
SLLS350L − APRIL 1999 − REVISED MARCH 2004
DB, DW, OR PW PACKAGE
(TOP VIEW)
D
Single-Chip and Single-Supply Interface for
IBM PC/AT Serial Port
D
D
D
D
D
D
D
D
D
D
RS-232 Bus-Pin ESD Protection Exceeds
15 kV Using Human-Body Model (HBM)
C2+
C2−
1
28 C1+
27 V+
2
Meets or Exceeds the Requirements of
TIA/EIA-232-F and ITU v.28 Standards
3
26
25
24
23
22
21
20
19
18
17
16
15
V−
V
CC
4
RIN1
RIN2
RIN3
RIN4
RIN5
DOUT1
DOUT2
DOUT3
DIN3
DIN2
DIN1
GND
Operates With 3-V to 5.5-V V
Supply
5
C1−
CC
6
FORCEON
FORCEOFF
INVALID
ROUT2B
ROUT1
ROUT2
ROUT3
ROUT4
ROUT5
Three Drivers and Five Receivers
Operates Up To 250 kbit/s
7
8
Designed to Transmit at a Data Rate of
250 kbit/s
9
10
11
12
13
14
Low Standby Current . . . 1 µA Typical
External Capacitors . . . 4 × 0.1 µF
Accepts 5-V Logic Input With 3.3-V Supply
Always-Active Noninverting Receiver
Output (ROUT2B)
D
Alternative High-Speed Pin-Compatible
Device (1 Mbit/s)
− SNx5C3243
D
D
Serial-Mouse Driveability
Auto-Powerdown Feature to Disable Driver
Outputs When No Valid RS-232 Signal Is
Sensed
D
Applications
− Battery-Powered Systems, PDAs,
Notebooks, Laptops, Palmtop PCs, and
Hand-Held Equipment
description/ordering information
The MAX3243consists of three line drivers, five line receivers, and a dual charge-pump circuit with 15-kV ESD
(HBM) 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. This combination of drivers and receivers matches that needed for the typical serial
port 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, the device includes an always-active noninverting output
(ROUT2B), which allows applications using the ring indicator to transmit data while the device is powered down.
The device operates at data signaling rates up to 250 kbit/s and a maximum of 30-V/µs driver output slew rate.
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.
AT, IBM, and PC are trademarks of International Business Machines Corporation.
ꢝ
ꢝ
ꢓ
ꢉ
ꢮ
ꢕ
ꢩ
ꢌ
ꢏ
ꢧ
ꢈ
ꢨ
ꢎ
ꢢ
ꢉ
ꢠ
ꢑ
ꢡ
ꢕ
ꢁ
ꢈ
ꢁ
ꢟ
ꢠ
ꢪ
ꢡ
ꢢ
ꢨ
ꢣ
ꢤ
ꢥ
ꢥ
ꢦ
ꢦ
ꢟ
ꢟ
ꢢ
ꢢ
ꢠ
ꢠ
ꢟ
ꢧ
ꢧ
ꢫ
ꢨ
ꢩ
ꢣ
ꢣ
ꢪ
ꢪ
ꢠ
ꢦ
ꢥ
ꢤ
ꢧ
ꢧ
ꢢ
ꢡ
ꢫ
ꢈꢪ
ꢩ
ꢬ
ꢧ
ꢭ
ꢟ
ꢨ
ꢥ
ꢧ
ꢦ
ꢟ
ꢦ
ꢢ
ꢣ
ꢠ
ꢩ
ꢮ
ꢥ
ꢠ
ꢦ
ꢦ
ꢪ
ꢧ
ꢋ
Copyright 2004, Texas Instruments Incorporated
ꢣ
ꢢ
ꢨ
ꢦ
ꢢ
ꢣ
ꢤ
ꢦ
ꢢ
ꢧ
ꢫ
ꢟ
ꢡ
ꢟ
ꢨ
ꢪ
ꢣ
ꢦ
ꢯ
ꢦ
ꢪ
ꢣ
ꢢ
ꢡ
ꢰ
ꢥ
ꢎ
ꢠ
ꢤ
ꢪ
ꢧ
ꢦ
ꢥ
ꢠ
ꢮ
ꢥ
ꢣ
ꢮ
ꢱ
ꢥ
ꢦ ꢪ ꢧ ꢦꢟ ꢠꢳ ꢢꢡ ꢥ ꢭꢭ ꢫꢥ ꢣ ꢥ ꢤ ꢪ ꢦ ꢪ ꢣ ꢧ ꢋ
ꢣ
ꢣ
ꢥ
ꢠ
ꢦ
ꢲ
ꢋ
ꢝ
ꢣ
ꢢ
ꢮ
ꢩ
ꢨ
ꢦ
ꢟ
ꢢ
ꢠ
ꢫ
ꢣ
ꢢ
ꢨ
ꢪ
ꢧ
ꢧ
ꢟ
ꢠ
ꢳ
ꢮ
ꢢ
ꢪ
ꢧ
ꢠ
ꢢ
ꢦ
ꢠ
ꢪ
ꢨꢪ
ꢧ
ꢧ
ꢥ
ꢣ
ꢟ
ꢭ
ꢲ
ꢟ
ꢠ
ꢨ
ꢭ
ꢩ
ꢮ
ꢪ
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265