LTC491
U
TYPICAL APPLICATIO S
RS232 Receiver
RS232 to RS485 Level Transistor with Hysteresis
R = 220k
RS232 IN
Y
5.6k
RX
RECEIVER
1/2 LTC491
10k
120Ω
RS232 IN
DRIVER
1/2 LTC491
HYSTERESIS = 10kΩ •
5.6k
LTC491 • TA02
Z
VY - VZ
19k
———— ————
≈
R
R
LTC491 • TA03
RELATED PARTS
PART NUMBER
LTC486/LTC487
LTC488/LTC489
LTC1480
DESCRIPTION
COMMENTS
Low Power Quad RS485 Drivers
110µA Supply Current
7mA Supply Current
Lower Supply Voltage
Lowest Power
Low Power Quad RS485 Receivers
3.3V Supply RS485 Transceiver
LTC1481
Low Power RS485 Transceiver with Shutdown
RS485 Transceiver with Carrier Detect
Low Power, Low EMI RS485 Transceiver
RS485 Transceiver with Fail-Safe
10Mbps RS485 Transceiver
LTC1482
±15kV ESD, Fail-Safe
LTC1483
Slew Rate Limited Driver Outputs, Lowest Power
±15kV ESD, MSOP Package
LTC1484
LTC1485
High Speed
LTC1518/LTC1519
LTC1520
52Mbps Quad RS485 Receivers
Higher Speed, LTC488/LTC489 Pin-Compatible
100mV Threshold, Low Channel-to-Channel Skew
LVDS-Compatible Quad Receiver
2500V Isolated RS485 Transceiver
52Mbps RS485 Transceiver
LTC1535
Full-Duplex, Self-Powered Using External Transformer
Industry-Standard Pinout, 500ps Propagation Delay Skew
LTC490/LTC491 Pin Compatible
LTC1685
LTC1686/LTC1687
LTC1688/LTC1689
LTC1690
52Mbps Full-Duplex RS485 Transceiver
100Mbps Quad RS485 Drivers
Highest Speed, LTC486/LTC487 Pin Compatible
±15kV ESD, LTC490 Pin Compatible
Full-Duplex RS485 Transceiver with Fail-Safe
±60V Protected RS485 Transceivers
±60V Protected Full-Duplex RS485 Transceivers
LT1785/LTC1785A
LT1791/LTC1791A
±15kV ESD, Fail-Safe (LT1785A)
±15kV ESD, Fail-Safe (LT1791A), LTC491 Pin Compatible
491fa
LT/TP 0104 1K REV A • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
12
●
●
LINEAR TECHNOLOGY CORPORATION 1992
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
Linear [ Linear ]
