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LT1237CSW Datasheet

  • LT1237CSW

  • 5V RS232 Transceiver with Advanced Power Management and One ...

  • 178.80KB

  • 8頁(yè)

  • LINER

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LT1237
5V RS232 Transceiver with
Advanced Power Management and
One Receiver Active in Shutdown
FEATURES
s
s
s
s
s
s
s
s
s
s
s
s
s
DESCRIPTIO
s
s
One Receiver Remains Active While in Shutdown
ESD Protection over
鹵15kV
Uses Small Capacitors: 0.1碌F, 0.2碌F, 1.0碌F
60碌A(chǔ) Supply Current in Shutdown
Pin Compatible with LT1137A
120kBaud Operation for R
L
= 3k, C
L
= 2500pF
250kBaud Operation for R
L
= 3k, C
L
= 1000pF
Operates to 120kBaud
CMOS Comparable Low Power 30mW
Operates from a Single 5V Supply
Easy PC Layout鈥擣lowthrough Architecture
Rugged Bipolar Design
Outputs Assume a High Impedance State When Off
or Powered Down
Absolutely No Latchup
Available in SO and SSOP Packages
The LT
廬
1237 is an advanced low power three driver, five
receiver RS232 transceiver. Included on the chip is a
shutdown pin for reducing supply current near zero.
During shutdown one receiver remains active to detect
incoming RS232 signals, for example, to wake up a
system.
The LT1237 is fully compliant with all EIA RS232 specifi-
cations. New ESD structures on the chip allow the LT1237
to survive multiple
鹵15kV
strikes, eliminating the need for
costly TransZorbs
廬
on the RS232 line pins.
The LT1237 operates in excess of 120kbaud even driving
heavy capacitive loads. Two shutdown modes allow the
driver outputs to be shut down separately from the receiv-
ers for more versatile control of the RS232 interface.
During shutdown, drivers and receivers assume a high
impedance state.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TransZorb is a registered trademark of General Instruments, GSI
APPLICATIO S
s
s
Notebook Computers
Palmtop Computers
TYPICAL APPLICATIO
V
+
1.0碌F
2
脳
0.1碌F
DRIVER 1 OUT
RX1 IN
DRIVER 2 OUT
TO
LINE
RX2 IN
RX3 IN
RX4 IN
DRIVER 3 OUT
RX5 IN (LOW-Q)
ON/OFF
5V V
CC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
LT1237
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
鈥?/div>
0.1碌F
2
脳
0.1碌F
DRIVER 1 IN
RX1 OUT
DRIVER 2 IN
RX2 OUT
RX3 OUT
RX4 OUT
DRIVER 3 IN
RX5 OUT (LOW-Q)
GND
DRIVER
DISABLE
RING DETECT IN
碌CONTROLLER
OR
碌PROCESSOR
SHUTDOWN
CONTROL OUT
LT1237 TA01
RECEIVER
OUTPUT
C
L
= 50pF
DRIVER
OUTPUT
R
L
= 3k
C
L
= 2500pF
TO LOGIC
R
INPUT
U
Output Waveforms
1237 TA02
U
U
1

LT1237CSW 產(chǎn)品屬性

  • LT1237

  • 27

  • 集成電路 (IC)

  • 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器

  • -

  • 收發(fā)器

  • 3/5

  • RS232

  • 4.5 V ~ 5.5 V

  • 表面貼裝

  • 28-SOIC（0.295"，7.50mm 寬）

  • 28-SOIC

  • 管件

  • LT1237CS

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