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LT1537CG Datasheet

  • LT1537CG

  • Linear Technology [Advanced Low Power 5V RS232 Transceiver ...

  • LINER

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LT1537
Advanced Low Power
5V RS232 Transceiver with
Small Capacitors
FEATURES
s
s
s
s
s
s
s
s
s
s
DESCRIPTIO
s
s
s
s
Low Cost
Uses Small Capacitors: 0.1碌F, 0.2碌F
1
碌
A Supply Current in Shutdown
120kBaud Operation for R
L
= 3k, C
L
= 2500pF
250kBaud Operation for R
L
= 3k, C
L
= 1000pF
CMOS Comparable Low Power: 40mW
Operates from a Single 5V Supply
Easy PC Layout: Flow-through Architecture
Rugged Bipolar Design
Outputs Assume a High Impedance State When Off
or Powered Down
Improved Protection: RS232 I/O Lines Can Be Forced
to
鹵25V
Without Damage
Output Overvoltage Does Not Force Current Back
into Supplies
Absolutely No Latch-Up
Available in SO Package
The LT
廬
1537 is a three-driver, five-receiver RS232 trans-
ceiver, pin compatible with the LT1137A, offering perfor-
mance improvements and two shutdown modes. The
LT1537鈥檚 charge pump is designed for extended compli-
ance and can deliver over 35mA of load current. Supply
current is typically 8mA, competitive with similar CMOS
devices. An advanced driver output stage operates up to
250kbaud while driving heavy capacitive loads.
The LT1537 is fully compliant with all RS232 specifica-
tions. Special bipolar construction techniques protect the
drivers and receivers beyond the fault conditions stipu-
lated for RS232. Driver outputs and receiver inputs can be
shorted to
鹵25V
without damaging the device or the
power supply generator. In addition, the RS232 I/O pins
are resilient to multiple
鹵5kV
ESD strikes.
The transceiver has two shutdown modes. One mode
disables the drivers and the charge pump, the other shuts
down all circuitry. While shut down, the drivers and
receivers assume high impedance output states.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATI
s
s
S
Notebook Computers
Palmtop Computers
TYPICAL APPLICATI
+
0.1碌F
2
脳
0.1碌F
V
+
5V V
CC
1
2
3
4
DRIVER OUT
RX IN
DRIVER OUT
TO
LINE
RX IN
RX IN
RX IN
DRIVER OUT
RX IN
ON/OFF = 5V
5
6
7
8
9
10
11
12
13
14
LT1537
28
27
25
24
23
22
21
20
19
18
17
16
15
26
V
鈥?/div>
0.1碌F
RECEIVER
OUTPUT
C
L
= 50pF
R
DRIVER
OUTPUT
R
L
= 3k
C
L
= 2500pF
DRIVER IN
RX OUT
DRIVER IN
RX OUT
RX OUT
RX OUT
DRIVER IN
RX OUT
GND
DRIVER
DISABLE
LT1537 鈥?TA01
+
+
2
脳
0.1碌F
TO LOGIC
INPUT
U
Output Waveforms
LT1537 鈥?TA02
+
UO
UO
1

LT1537CG 產(chǎn)品屬性

  • LT1537

  • 47

  • 集成電路 (IC)

  • 接口 - 驅(qū)動器，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-SSOP（0.209"，5.30mm 寬）

  • 28-SSOP

  • 管件

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