LTC1347CG Linear Technology, LTC1347CG Datasheet

IC TXRX 5V RS232 LOW PWR 28-SSOP

LTC1347CG

Manufacturer Part Number
LTC1347CG
Description
IC TXRX 5V RS232 LOW PWR 28-SSOP
Manufacturer
Linear Technology
Type
Transceiverr
Datasheets

Specifications of LTC1347CG

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

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LTC1347CG
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Part Number:
LTC1347CG#TRPBF
Manufacturer:
LTNEAR
Quantity:
20 000
FEATURES
TYPICAL APPLICATIO
0.1µF
APPLICATIO S
C1
Low Supply Current: 300µA
Five Receivers Kept Alive in Shutdown
ESD Protection Over ±10kV
Operates from a Single 5V Supply
Uses Small Capacitors: 0.1µF
Operates to 120kBaud
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
ON/OFF
RX1 IN
RX2 IN
RX3 IN
RX4 IN
RX5 IN
3-Drivers/5-Receivers with Shutdown
V
NC
V
CC
+
U
10
11
12
13
14
1
2
3
4
5
6
7
8
9
LTC1347
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
1347 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, all five receivers are kept alive and the
supply current is 80µA. All RS232 outputs assume a high
impedance state in Shutdown and with the power off.
The LTC1347 is fully compliant with all data rate and
overvoltage RS232 specifications. The transceiver can
operate up to 120kbaud 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.
®
1347 is a 3-driver/5-receiver RS232 transceiver
1200
1000
800
600
400
200
with 5 Receivers Active
Quiescent and Shutdown Supply Current
0
–40
TEST CONDITION:
V
CC
= 5V, ALL DRIVER INPUTS TIED TO V
5V Low Power RS232
–20
U
SHUTDOWN
QUIESCENT
CURRENT
vs Temperature
0
CURRENT
TEMPERATURE (°C)
20
40
in Shutdown
60
80
CC
.
LTC1347
100
1347 TA02
120
100
80
60
40
20
0
1347fa
1

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LTC1347CG Summary of contents

Page 1

... RS232 specifications. The transceiver can operate up to 120kbaud 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. Quiescent and Shutdown Supply Current 1200 – 28 ...

Page 2

... OUT OUT OUT U W TOP VIEW ORDER PART + 1 28 V– NUMBER C2– DR1 IN LTC1347CG 5 24 RX1 OUT LTC1347CNW 6 23 DR2 IN LTC1347CSW 7 22 RX2 OUT 8 21 RX3 OUT 9 20 RX4 OUT 10 19 DR3 RX5 OUT 12 17 GND 13 16 ...

Page 3

DC ELECTRICAL CHARACTERISTICS temperature range 5V 0.1µF, unless otherwise noted. CC PARAMETER CONDITIONS Power Supply Generator + V Output Voltage I OUT I OUT – V Output Voltage I OUT ...

Page 4

LTC1347 W U TYPICAL PERFOR A CE CHARACTERISTICS V Supply Current DRIVERS LOADED DRIVER LOADED ...

Page 5

CTIO S charge pump efficiency, the capacitor’s effective series resistance should be less than 2Ω. DRIVER IN: RS232 Driver Input Pins. Inputs are TTL/ CMOS compatible. Inputs should not be allowed to float. Tie unused ...

Page 6

LTC1347 TEST CIRCUITS DRIVER DRIVER INPUT Figure 3. Driver Timing Test Load C1 0.1µF RS232 LINE PINS PROTECTED TO ±10kV 6 DRIVER OUTPUT 51pF 3k 1347 F03 + LTC1347 ...

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 representa- tion 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 1002 1K REV A • PRINTED IN USA  LINEAR TECHNOLOGY CORPORATION 1994 1347fa ...

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