Datasheet Linear Technology LTC489 — 数据表

LTC488/LTC489
Quad RS485 Line Receiver
FEATURES DESCRIPTION n The LTCВ®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. Low Power: ICC = 7mA Typ
Designed for RS485 or RS422 Applications
Single 5V Supply
–7V to 12V Bus Common Mode Range Permits ±7V
Ground Difference Between Devices on the Bus
60mV Typical Input Hysteresis
Receiver Maintains High Impedance in Three-State or
with the Power Off
28ns Typical Receiver Propagation Delay
Pin Compatible with the SN75173 (LTC488)
Pin Compatible with the SN75175 (LTC489) APPLICATIONS 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 common mode range.
The receiver has a fail-safe feature which guarantees a
high output state when the inputs are left open. Low Power RS485/RS422 Receivers
Level Translator Both AC and DC speciп¬Ѓcations are guaranteed 4.75V to …