LTC1349CSW Linear Technology, LTC1349CSW Datasheet

IC TXRX 5V RS232 LOW PWR 28-SOIC

LTC1349CSW

Manufacturer Part Number
LTC1349CSW
Description
IC TXRX 5V RS232 LOW PWR 28-SOIC
Manufacturer
Linear Technology
Type
Transceiverr
Datasheet

Specifications of LTC1349CSW

Number Of Drivers/receivers
3/5
Protocol
RS232
Voltage - Supply
4.5 V ~ 5 V
Mounting Type
Surface Mount
Package / Case
28-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
LTC1349CS

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LTC1349CSW
Manufacturer:
LTNEAR
Quantity:
20 000
FEATURES
APPLICATIO S
TYPICAL APPLICATIO
0.1µF
C1
Low Supply Current: 300µA
Two Receivers Kept Alive in Shutdown
ESD Protection Over ±10kV
Operates from a Single 5V Supply
Uses Small Capacitors: 0.1µF
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
DRIVER 1 OUT
DRIVER 2 OUT
DRIVER 3 OUT
0.1µF
C2
3-Drivers/5-Receivers with Shutdown
ON/OFF
RX1 IN
RX2 IN
RX3 IN
RX4 IN
RX5 IN
V
NC
V
CC
+
10
11
12
13
14
U
1
2
3
4
5
6
7
8
9
LTC1349
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
NC
NC
C3
0.1µF
LTC1349 • TA01
C4
0.1µF
3-Driver/5-Receiver Transceiver
DESCRIPTIO
The LTC
with very low supply current. In the no load condition, the
supply current is only 300µA. The charge pump only
requires four 0.1µF capacitors.
In Shutdown mode, two receivers are kept alive and the
supply current is 35µA. All RS232 outputs assume a high
impedance state in Shutdown and with the power off.
The LTC1349 is fully compliant with all data rate and
overvoltage RS232 specifications. The transceiver can
operate up to 120k baud with a 2500pF, 3kΩ load. Both
driver outputs and receiver inputs can be forced to ±25V
without damage, and can survive multiple ±10kV ESD
strikes.
, LTC and LT are registered trademarks of Linear Technology Corporation.
®
with 2 Receivers Active
1349 is a 3-driver/5-receiver RS232 transceiver
Quiescent and Shutdown Supply Current
1200
1000
800
600
400
200
0
–40
TEST CONDITION:
V
5V Low Power RS232
CC
= 5V, ALL DRIVER INPUTS TIED TO V
–20
U
QUIESCENT
CURRENT
vs Temperature
0
TEMPERATURE (°C)
SHUTDOWN
CURRENT
20
40
in Shutdown
60
80
CC
.
LTC1349
LTC1349 • TA02
100
60
50
40
30
20
10
0
1349fa
1

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LTC1349CSW Summary of contents

Page 1

... RS232 specifications. The transceiver can operate up to 120k baud with a 2500pF, 3kΩ load. Both driver outputs and receiver inputs can be forced to ±25V without damage, and can survive multiple ±10kV ESD strikes. , LTC and LT are registered trademarks of Linear Technology Corporation. – 0.1µ ...

Page 2

... W TOP VIEW ORDER PART + V– NUMBER C2 C2– C1– DR1 IN LTC1349CG 5 24 RX1 OUT LTC1349CNW 6 23 DR2 IN LTC1349CSW 7 22 RX2 OUT 8 21 RX3 OUT LTC1349IG 9 20 RX4 OUT LTC1349INW 10 19 DR3 IN LTC1349ISW 11 18 RX5 OUT 12 17 GND PACKAGE 28-LEAD PDIP SW PACKAGE ...

Page 3

DC ELECTRICAL CHARACTERISTICS temperature range 5V 0.1µF, unless noted. CC PARAMETER CONDITIONS Power Supply V Supply Current No Load (All Drivers Load (All Drivers V No Load ...

Page 4

LTC1349 W U TYPICAL PERFOR A CE CHARACTERISTICS 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

LTC1349 TEST CIRCUITS C1 0.1µF RS232 LINE PINS PROTECTED TO ±10kV 6 ESD Test Circuit – LTC1349 0.1µF DRIVER DRIVER 1 OUT ...

Page 7

... MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm) 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

... NOTE .394 – .419 (10.007 – 10.643) N .037 – .045 (0.940 – 1.143) .004 – .012 (0.102 – 0.305) S28 (WIDE) 0502 LW/TP 1102 1K REV A • PRINTED IN USA  LINEAR TECHNOLOGY CORPORATION 1993 1349fa ...

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