LTC488 Datasheet, PDF (1/12 Pages) Linear Technology – Quad RS485 Line Receiver

LTC488/LTC489
Quad RS485 Line Receiver
FEATURES
s _{Low Power: ICC = 7mA Typ}
s _{Designed for RS485 or RS422 Applications}
s _{Single 5V Supply}
s _{– 7V to 12V Bus Common Mode Range Permits ±7V}
Ground Difference Between Devices on the Bus
s _{60mV Typical Input Hysteresis}
s _{Receiver Maintains High Impedance in Three-State or}
with the Power Off
s _{28ns Typical Receiver Propagation Delay}
s _{Pin Compatible with the SN75173 (LTC488)}
s _{Pin Compatible with the SN75175 (LTC489)}
APPLICATI S
s Low Power RS485/RS422 Receivers
s _{Level Translator}
DESCRIPTIO
The LTC^®488 and LTC489 are low power differential bus/
line receivers designed for multipoint data transmission
standard RS485 applications with extended common mode
range (12V to – 7V). They also meet the requirements of
RS422.
The CMOS design offers significant power savings over its
bipolar counterpart without sacrificing ruggedness against
overload or ESD damage.
The receiver features three-state outputs, with the receiver
output maintaining high impedance over the entire com-
mon mode range.
The receiver has a fail-safe feature which guarantees a
high output state when the inputs are left open.
Both AC and DC specifications are guaranteed 4.75V to
5.25V supply voltage range.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATI
EN EN
DRIVER
DI
1/4 LTC486
EN12
DRIVER
DI
1/4 LTC487
EN EN
120Ω
2
4
12
RECEIVER 3
120Ω _{1 1/4 LTC488}
RO
4000 FT 24 GAUGE TWISTED PAIR
120Ω
EN12
2
4
RECEIVER 3
120Ω _{1 1/4 LTC489}
RO
4000 FT 24 GAUGE TWISTED PAIR
LTC488/9 TA01
1