LT1342CG Linear Technology, LT1342CG Datasheet

IC TXRX 5V RS232 W/3VLOGC 28SSOP

LT1342CG

Manufacturer Part Number
LT1342CG
Description
IC TXRX 5V RS232 W/3VLOGC 28SSOP
Manufacturer
Linear Technology
Type
Transceiverr
Datasheet

Specifications of LT1342CG

Number Of Drivers/receivers
3/5
Protocol
RS232
Voltage - Supply
4.5 V ~ 5.5 V
Mounting Type
Surface Mount
Package / Case
28-SSOP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
LT1342CGW
LT1342CGW

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LT1342CG
Manufacturer:
LT/凌特
Quantity:
20 000
Part Number:
LT1342CG#PBF
Manufacturer:
Linear Technology
Quantity:
135
Part Number:
LT1342CG#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Part Number:
LT1342CG#TRPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURE
A
TO LINE
TYPICAL
0.1 F
PPLICATI
2 0.1 F
Notebook Computers
Palmtop Computers
ESD Protection Over 10kV
3V Logic Interface
Uses Small Capacitors: 0.1 F, 0.2 F
1 A Supply Current in Shutdown
Low Power Driver Disable Operating Mode
Pin Compatible with LT1137A
120kBaud Operation for R
250kBaud Operation for R
CMOS Comparable Low Power: 60mW
Operates from a 5V Supply and 3V Logic Supply
Easy PC Layout: Flowthrough Architecture
Rugged Bipolar Design
Outputs Assume a High Impedance State When
Off or Powered Down
Absolutely No Latchup
DRIVER 1 OUT
DRIVER 2 OUT
DRIVER 3 OUT
ON/OFF
5V V
RX1 IN
RX2 IN
RX3 IN
RX4 IN
RX5 IN
3V V
S
A
V
CC
+
L
O
PPLICATI
10
11
12
13
14
1
2
3
4
5
6
7
8
9
U
S
LT1342
L
L
O
= 3k, C
= 3k, C
28
27
26
25
24
23
22
21
20
19
18
17
16
15
U
V
DRIVER 1 IN
RX1 OUT
DRIVER 2 IN
RX2 OUT
RX3 OUT
RX4 OUT
DRIVER 3 IN
RX5 OUT
GND
DRIVER DISABLE
NC
LT1342 • TA01
L
L
= 2500pF
= 1000pF
2 0.1 F
TO 3V LOGIC
0.1 F
D
The LT
receiver RS232 transceiver. The LT1342 operates from a
5V supply and a 3V logic supply. Receiver outputs can
interface directly to 3V logic circuits. Included on the chip
is a shutdown pin for reducing supply current to near zero.
All receivers and drivers assume high impedance states
during shutdown.
The driver disable function provides additional control of
operating mode. When driver disable is high the charge
pump and drivers turn off. Receivers continue to operate
during driver disable.
New ESD structures on the chip allow the LT1342 to
survive multiple 10kV strikes, eliminating the need for
costly TransZorbs
The LT1342 is fully compliant with all EIA RS232 specifi-
cations and operates in excess of 120kbaud even driving
heavy capacitive loads.
TransZorb is a registered trademark of General Instruments, GSI.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ESCRIPTIO
5V RS232 Transceiver with
®
C
1342 is an advanced low power three-driver, five-
L
RECEIVER
R
C
= 2500pF
OUTPUT
L
OUTPUT
DRIVER
V
R
= 50pF
INPUT
L
L
= 3V
= 3k
®
3V Logic Interface
on the RS232 line pins.
U
Output Waveforms
LT1342
LT1342 • TA02
1

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LT1342CG Summary of contents

Page 1

... TransZorbs The LT1342 is fully compliant with all EIA RS232 specifi- cations and operates in excess of 120kbaud even driving heavy capacitive loads. , LTC and LT are registered trademarks of Linear Technology Corporation. TransZorb is a registered trademark of General Instruments, GSI. – V RECEIVER ...

Page 2

... PLASTIC SSOP Consult factory for Industrial and Military grade parts. (Note 2) – 0 ON/OFF 5V DRIVER DISABLE U W ORDER PART TOP VIEW NUMBER + – – LT1342CG – DRIVER 1 IN LT1342CNW 5 RX1 OUT 24 LT1342CSW 6 23 DRIVER RX2 OUT 8 21 RX3 OUT 9 20 RX4 OUT 10 ...

Page 3

ELECTRICAL C HARA TERISTICS C PARAMETER CONDITIONS Any Driver Output Voltage Swing Load = 3k to GND Logic Input Voltage Level Input Low Level (V Input High Level (V Logic Input Current 0.8V V Output Short-Circuit Current V OUT Output ...

Page 4

LT1342 W U TYPICAL PERFOR A Driver Output Voltage OUTPUT HIGH 5. 4. 4.5V CC – ...

Page 5

W U TYPICAL PERFOR A Driver Short-Circuit Current –55 – TEMPERATURE ( C) Receiver Output Waveforms RX5 OUTPUT C = 50pF L RX1 TO RX4 OUTPUT C = 50pF L ...

Page 6

LT1342 CTIO S – Negative Supply Output (RS232 Drivers). V –(2V – 2.5V). This pin requires an external charge CC storage capacitor C 0 reduce supply ripple, increase the size of ...

Page 7

... DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD 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 its circuits as described herein will not infringe on existing patent rights. U Dimensions in inches (millimeters) unless otherwise noted ...

Page 8

... LOGIC “0” 22 RX2 OUT 21 RX3 OUT MOUSE DATA 20 RX4 OUT 19 DRIVER 3 IN LOGIC “1” 18 RX5 OUT 17 GND 16 DRIVER DISABLE 15 NC LT1342 • TA04 15kV IEC-1000-4-2 ESD Protection 1342fa LT/TP 1098 REV A 2K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1993 0.1 F ...

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