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MAX3243E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
WITH
±15-kV
IEC ESD PROTECTION
SLLS657A – APRIL 2005 – REVISED JUNE 2005
FEATURES
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•
Single-Chip and Single-Supply Interface for
IBM™ PC/AT™ Serial Port
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 Requirements of
TIA/EIA-232-F and ITU v.28 Standards
Operates With 3-V to 5.5-V V
CC
Supply
Always-Active Noninverting Receiver Output
(ROUT2B)
Designed to Transmit at a Data Rate up to
500 kbit/s
Low Standby Current . . . 1
µA
Typ
External Capacitors . . . 4
×
0.1
µF
Accepts 5-V Logic Input With 3.3-V Supply
Designed to Be Interchangeable With Maxim
MAX3243E
Serial-Mouse Driveability
Auto-Powerdown Feature to Disable Driver
Outputs When No Valid RS-232 Signal Is
Sensed
Applications
– Battery-Powered Systems, PDAs,
Notebooks, Laptops, Palmtop PCs, and
Hand-Held Equipment
Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages
DB, DW, OR PW PACKAGE
(TOP VIEW)
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•
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•
•
•
•
•
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C2+
C2−
V−
RIN1
RIN2
RIN3
RIN4
RIN5
DOUT1
DOUT2
DOUT3
DIN3
DIN2
DIN1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
C1+
V+
V
CC
GND
C1−
FORCEON
FORCEOFF
INVALID
ROUT2B
ROUT1
ROUT2
ROUT3
ROUT4
ROUT5
QFN PACKAGE
(TOP VIEW)
C2+
C1+
C2–
V
CC
26
NC
32 31
30
29
28 27
25
24
23
22
21
20
19
18
17
RIN1
RIN2
RIN3
RIN4
RIN5
DOUT1
DOUT2
DOUT3
NC
V+
V–
1
2
3
4
5
6
7
8
9
10
11
12
13 14
15
16
GND
C1–
FORCEON
FORCEOFF
INVALID
ROUTB2
ROUT1
ROUT2
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•
DIN3
DIN2
DIN1
NC
ROUT5
ROUT4
DESCRIPTION
The MAX3243E device consists of three line drivers, five line receivers, and a dual charge-pump circuit with
±15-kV
ESD (HBM and IEC61000-4-2, Air-Gap Discharge) and
±8-kV
ESD (IEC61000-4-2, Contact Discharge)
protection on serial-port connection pins. 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.
IBM, PC/AT are trademarks of International Business Machines Corporation.
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 © 2005, Texas Instruments Incorporated
ROUT3
NC
TI [ TEXAS INSTRUMENTS ]
