LT1381CS#PBF Linear Technology, LT1381CS#PBF Datasheet

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LT1381CS#PBF

Manufacturer Part Number
LT1381CS#PBF
Description
IC DVR/RCVR 5V RS232 DUAL 16SOIC
Manufacturer
Linear Technology
Type
Transceiverr
Datasheet

Specifications of LT1381CS#PBF

Number Of Drivers/receivers
2/2
Protocol
RS232
Voltage - Supply
4.5 V ~ 5.5 V
Mounting Type
Surface Mount
Package / Case
16-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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FEATURE
A
TYPICAL
PPLICATI
OUTPUTS
ESD Protection over 10kV
Low Cost
Uses Small Capacitors: 0.1 F
CMOS Comparable Low Power: 40mW
Operates from a Single 5V Supply
120kBaud Operation for R
250kBaud Operation for R
Rugged Bipolar Design
Outputs Assume a High Impedance State When
Powered Down
Absolutely No Latchup
Available in Narrow SO Package
Portable Computers
Battery-Powered Systems
Power Supply Generator
Terminals
Modems
INPUTS
LOGIC
LOGIC
0.1 F
0.1 F
+
+
S
A
11
10
12
1
3
4
5
9
O
PPLICATI
U
LT1381
S
S
5k
5k
L
L
16
2
6
14
7
13
8
15
= 3k, C
= 3k, C
O
+
+
U
0.1 F
0.1 F
L
L
= 2500pF
= 1000pF
LT1381 • TA01
5V INPUT
V
V
RS232 OUTPUT
RS232 OUTPUT
RS232 INPUT
RS232 INPUT
+
OUT
OUT
D
The LT
integral charge pump to generate RS232 voltage levels
from a single 5V supply. The circuit features rugged
bipolar design to provide operating fault tolerance and
ESD protection unmatched by competing CMOS designs.
Using only 0.1 F external capacitors, the circuit con-
sumes only 40mW of power and can operate to 120kbaud
even while driving heavy capacitive loads. New ESD struc-
tures on the chip allow the LT1381 to survive multiple
on the RS232 line pins. Driver outputs are protected from
overload and can be shorted to ground or up to 25V
without damage. During power-off conditions, driver and
receiver outputs are in a high impedance state, allowing
line sharing.
TransZorb
10kV strikes, eliminating the need for costly TransZorbs
, LTC and LT are registered trademarks of Linear Technology Corporation.
ESCRIPTIO
C
L
RECEIVER
R
C
Low Power 5V RS232 Dual
= 2500pF
OUTPUT
OUTPUT
L
DRIVER
R
= 50pF
®
INPUT
L
®
= 3k
is a registered trademark of General Instruments, GSI
1381 is a dual RS232 driver/receiver pair with
Driver/Receiver with
U
0.1 F Capacitors
Output Waveforms
LT1381
LT1381 • TA02
1
®

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LT1381CS#PBF Summary of contents

Page 1

... RS232 line pins. Driver outputs are protected from overload and can be shorted to ground 25V without damage. During power-off conditions, driver and receiver outputs are in a high impedance state, allowing line sharing. , LTC and LT are registered trademarks of Linear Technology Corporation. ® TransZorb is a registered trademark of General Instruments, GSI 5V INPUT ...

Page 2

LT1381 BSOLUTE (Note 1) Supply Voltage (V ) ................................................ ........................................................................ 13.2V – V ...................................................................... –13.2V Input Voltage Driver ........................................................... V Receiver ............................................... – 30V to 30V Output Voltage + ...

Page 3

ELECTRICAL C HARA TERISTICS C PARAMETER CONDITIONS Receiver Input Voltage Thresholds Input Low Threshold (V Input High Threshold (V Hysteresis Input Resistance (Note 6) Output Voltage Output Low, I Output High, I Output Short-Circuit Current Sinking Current, V Sourcing Current, ...

Page 4

LT1381 W U TYPICAL PERFOR A CE CHARACTERISTICS Receiver Input Threshold 3.00 2.75 2.50 2.25 INPUT HIGH 2.00 1.75 1.50 INPUT LOW 1.25 1.00 0.75 0.50 50 125 –55 – 100 TEMPERATURE (°C) LT1381 • TPC04 Receiver ...

Page 5

CTIO S + – + – (Pins 5): Commutating Capacitor Inputs. These pins require two external capaci- + – tors C 0.1 F: one from ...

Page 6

LT1381 TYPICAL APPLICATIO 10% FROM SYSTEM LIM 100 F LT1111 GND SW2 OUT ISOLATOR OUTPUT OS (DATA TO SYSTEM) LTC1145 GND2 GND1 V IN ISOLATOR INPUT IN (DATA FROM ...

Page 7

... FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE 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 circuits as described herein will not infringe on existing patent rights. ...

Page 8

... RS232 OUTPUT 12 13 RS232 INPUT RS232 INPUT 0 – – LT1381 • TA07 COMMENTS Pin Compatible with LT1280A/LT1280A Pin Compatible with LT1180A/LT1181A IEC 1000-4-2 Level 4 Compliance 1381fa, sn1381 LT/TP 1098 REV A 2K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1993 ...

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