LTC1337C Linear Technology, LTC1337C Datasheet

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LTC1337C

Manufacturer Part Number
LTC1337C
Description
5V Low Power RS232 3-Driver/5-Receiver Transceiver
Manufacturer
Linear Technology
Datasheet

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FEATURE
A
TYPICAL
0.1 F
PPLICATI
Low Supply Current: 300 A
1 A Supply Current in SHUTDOWN
ESD Protection: Over 10kV
Operates from a Single 5V Supply
Uses Small Capacitors: 0.1 F
Operates to 120k Baud
Three-State Outputs Are High Impedance When Off
Output Overvoltage Does Not Force Current Back into
Supplies
RS232 I/O Lines Can Be Forced to 25V without
Damage
Pin Compatible with LT1137A and LT1237
Flowthrough Architecture
Notebook Computers
Palmtop Computers
C1
DRIVER 1 OUT
DRIVER 2 OUT
DRIVER 3 OUT
0.1 F
3-Drivers/5-Receivers with SHUTDOWN
C2
ON/OFF
RX1 IN
RX2 IN
RX3 IN
RX4 IN
RX5 IN
S
A
V
V
+
CC
O
PPLICATI
10
11
12
13
14
U
1
2
3
4
5
6
7
8
9
S
LTC1337
O
U
28
27
26
25
24
23
22
21
20
19
18
17
16
15
DRIVER 1 IN
RX1 OUT
DRIVER 2 IN
RX2 OUT
RX3 OUT
RX4 OUT
DRIVER 3 IN
RX5 OUT
V
GND
C3
0.1 F
1337 TA01
3-Driver/5-Receiver Transceiver
C4
0.1 F
D
The LTC1337 is a 3-driver/5-receiver RS232 transceiver
with very low supply current. In the no load condition, the
supply current is only 300 A. The charge pump only
requires four 0.1 F capacitors and can supply up to 12mA
of extra current to power external circuitry.
In SHUTDOWN mode, the supply current is further re-
duced to 1 A. All RS232 outputs assume a high imped-
ance state in SHUTDOWN and with the power off.
The LTC1337 is fully compliant with all data rate and
overvoltage RS232 specifications. The transceiver can
operate up to 120k baud with a 1000pF// 3k load. Both
driver outputs and receiver inputs can be forced to 25V
without damage, and can survive multiple 10kV ESD
strikes.
ESCRIPTIO
TEST CONDITION:
V
CC
600
500
400
300
200
100
= 5V, ALL DRIVER INPUTS TIED TO V
0
5V Low Power RS232
–20
U
0
SHUTDOWN
QUIESCENT
CURRENT
CURRENT
TEMPERATURE (°C)
Supply Current
20
40
CC
60
LTC1337
80
1337 TA02
1.2
1.0
0.8
0.6
0.4
0.2
0
1

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LTC1337C Summary of contents

Page 1

FEATURE S Low Supply Current: 300 Supply Current in SHUTDOWN ESD Protection: Over 10kV Operates from a Single 5V Supply Uses Small Capacitors: 0.1 F Operates to 120k Baud Three-State Outputs Are High Impedance When Off Output ...

Page 2

... Short Circuit Duration + V ................................................................... 30 sec – V ................................................................... 30 sec Driver Output .............................................. Indefinite Receiver Output .......................................... Indefinite Operating Temperature Range Commercial (LTC1337C) ........................ Storage Temperature Range ................ – 150 C Lead Temperature (Soldering, 10 sec)................. 300 ELECTRICAL C HARA TERISTICS PARAMETER CONDITIONS Any Driver Output Voltage Swing ...

Page 3

D C ELECTRICAL C HARA TERISTICS PARAMETER CONDITIONS Power Supply Generator + V Output Voltage I OUT I OUT – V Output Voltage I OUT I OUT Supply Rise Time SHUTDOWN to Turn-On Power Supply V Supply Current No Load ...

Page 4

LTC1337 W U TYPICAL PERFOR A V Supply Current DRIVERS LOADED DRIVER LOADED ...

Page 5

CTIO S DRIVER IN: RS232 Driver Input Pins. Inputs are TTL/ CMOS compatible. Inputs should not be allowed to float. Tie unused inputs DRIVER OUT: Driver Outputs at RS232 Voltage Levels. ...

Page 6

LTC1337 U O TYPICAL A PPLICATI 12V LINE MOUSE + V LOGIC (1) OPTICS – Operation Using 5V and 12V Power Supplies + LTC1337 ...

Page 7

... THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS. Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 8

... Linear Technology Corporation Rm. 801, No. 46, Sec. 2 Chung Shan N. Rd. Taipei, Taiwan, R.O.C. Phone: 886-2-521-7575 FAX: 886-2-562-2285 UNITED KINGDOM Linear Technology (UK) Ltd. The Coliseum, Riverside Way Camberley, Surrey GU15 3YL United Kingdom Phone: 44-276-677676 FAX: 44-276-64851 LT/GP 0893 10K REV 0 • PRINTED IN USA ...

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