LT1341CSW Linear Technology, LT1341CSW Datasheet

IC TXRX 5V RS232 W/SHTDWN 28SOIC

LT1341CSW

Manufacturer Part Number
LT1341CSW
Description
IC TXRX 5V RS232 W/SHTDWN 28SOIC
Manufacturer
Linear Technology
Type
Transceiverr
Datasheet

Specifications of LT1341CSW

Number Of Drivers/receivers
3/5
Protocol
RS232
Voltage - Supply
4.5 V ~ 5.5 V
Mounting Type
Surface Mount
Package / Case
28-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
LT1341CS

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Part Number
Manufacturer
Quantity
Price
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LT1341CSW
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Quantity:
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Manufacturer:
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FEATURE
A
TO LINE
TYPICAL
0.1 F
PPLICATI
Notebook Computers
Palmtop Computers
One Receiver Remains Active While in Shutdown
ESD Protection Over 10kV
Uses Small Capacitors: 0.1 F, 0.2 F
60 A Supply Current in Shutdown
Pin Compatible with LT1137A
120kBaud Operation for R
250kBaud Operation for R
CMOS Comparable Low Power: 60mW
Operates from a Single 5V Supply
Easy PC Layout: Flowthrough Architecture
Rugged Bipolar Design
Outputs Assume a High Impedance State When
Off or Powered Down
Absolutely No Latchup
Available in SSOP Package
2 0.1 F
RX5 IN (LOW-Q)
DRIVER 1 OUT
DRIVER 2 OUT
DRIVER 3 OUT
ON/OFF
RX1 IN
RX2 IN
RX3 IN
RX4 IN
S
A
NC
V
O
V
CC
PPLICATI
+
10
11
12
13
14
U
1
2
3
4
5
6
7
8
9
S
LT1341
L
L
= 3k, C
= 3k, C
O
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 (LOW-Q)
GND
DRIVER DISABLE
NC
L
L
= 2500pF
= 1000pF
2 0.1 F
TO LOGIC
RING DETECT IN
SHUTDOWN
CONTROL OUT
CONTROLLER
PROCESSOR
0.1 F
5V RS232 Transceiver with One
OR
Receiver Active in Shutdown
LT1341 • TA01
D
The LT
receiver RS232 transceiver. Included on the chip is a
shutdown pin for reducing supply current to near zero.
During shutdown one receiver remains active to detect
incoming RS232 signals, for example, to wake up a
system. All other receivers and the 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 LT1341 to
survive multiple 10kV strikes, eliminating the need for
costly TransZorbs
The LT1341 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
®
C
1341 is an advanced low power three-driver, five-
L
RECEIVER
C
R
= 2500pF
OUTPUT
OUTPUT
L
DRIVER
R
= 50pF
INPUT
L
= 3k
®
on the RS232 line pins.
U
Output Waveforms
LT1341
LT1341 • TA02
1

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LT1341CSW Summary of contents

Page 1

... TransZorbs The LT1341 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 OUTPUT 0 ...

Page 2

... DRIVER DISABLE U W ORDER PART TOP VIEW NUMBER + – – LT1341CG – DRIVER LT1341CNW 5 24 RX1 OUT LT1341CSW 6 23 DRIVER RX2 OUT RX3 OUT 9 20 RX4 OUT 10 DRIVER RX5 OUT 11 18 (LOW- GND DRIVER 13 16 DISABLE PACKAGE NW PACKAGE 28-LEAD (WIDE) PDIP ...

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

LT1341 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 – –25 0 TEMPERATURE ( C) Receiver Output Waveforms RX5 OUTPUT C = 50pF L RX1 TO RX4 OUTPUT C = 50pF L ...

Page 6

LT1341 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. ...

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 LT1341 • TA04 15kV ESD Protection 15kV ESD Protection 1341fa LT/TP 1098 2K REV A • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1993 0.1 F ...

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