Datasheet 搜索 > 接口芯片 > TI（德州仪器） > MAX3243CDB 数据手册 > MAX3243CDB 其他数据使用手册 1/19 页
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MAX3243CDB 其他数据使用手册 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
接口芯片
封装:
SSOP-28
描述:
TEXAS INSTRUMENTS MAX3243CDB. 线路接收器, RS232, 3驱动器, 3V-5.5电源, SSOP-28
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应用领域在P13P19
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MAX3243CDB数据手册
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1
FEATURES APPLICATIONS
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9
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28
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C2+
C2−
V−
RIN1
RIN2
RIN3
RIN4
RIN5
DOUT1
DOUT2
DOUT3
DIN3
DIN2
DIN1
C1+
V+
V
CC
GND
C1−
FORCEON
FORCEOFF
INVALID
ROUT2B
ROUT1
ROUT2
ROUT3
ROUT4
ROUT5
DB, DW, OR PW PACKAGE
(TOP VIEW)
DESCRIPTION/ORDERING INFORMATION
MAX3243
www.ti.com
................................................................................................................................................ SLLS350M – APRIL 1999 – REVISED SEPTEMBER 2008
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
WITH ± 15-kV ESD (HBM) PROTECTION
• Battery-Powered Systems
2
• Single-Chip and Single-Supply Interface
for IBM™ PC/AT™ Serial Port
• PDAs
• Notebooks
• RS-232 Bus-Pin ESD Protection Exceeds
± 15 kV Using Human-Body Model (HBM)
• Laptops
• Palmtop PCs
• D Meets or Exceeds the Requirements of
TIA/EIA-232-F and ITU v.28 Standards
• Hand-Held Equipment
• Operates With 3-V to 5.5-V V
CC
Supply
• Three Drivers and Five Receivers
• Low Standby Current . . . 1 mA Typical
• External Capacitors . . . 4 × 0.1 mF
• Accepts 5-V Logic Input With 3.3-V Supply
• Always-Active Noninverting Receiver
Output (ROUT2B)
• Operating Speed
– MAX3243C, MAX3243I . . . 250 Kbit/s
– MAX3243FC, MAX3243FI. . . 1000 Kbit/s
• Operating Temperature
– MAX3243C, MAX3243FC . . . 0 ° C to 70 ° C
– MAX3243I, MAX3243FI. . . – 40 ° C to 85 ° C
• Serial-Mouse Driveability
• Auto-Powerdown Feature to Disable Driver
Outputs When No Valid RS-232 Signal Is
Sensed
brk
brk
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The MAX3243 consists 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.
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 device does not sense a valid RS-232 signal, the driver outputs are disabled. If FORCEOFF is
set low, both drivers and receivers (except ROUT2B) are shut off, and the supply current is reduced to 1 µ A.
Disconnecting the serial port or turning off the peripheral drivers causes the auto-powerdown condition to occur.
1
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.
2 IBM, PC/AT are trademarks of IBM.
PRODUCTION DATA information is current as of publication date.
Copyright © 1999 – 2008, 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.
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