(China (Mainland))
Product Summary
The LTC491 is a low power differential bus/line transceiver designed for multipoint data transmission standard RS485
applications with extended common mode range (+12V to–7V). It also meets the requirements of RS422.
The CMOS design offers significant power savings over its bipolar counterpart without sacrificing ruggedness against
overload or ESD damage.
The driver and receiver feature three-state outputs, with the driver outputs maintaining high impedance over the
entire common mode range. Excessive power dissipation caused by bus contention or faults is prevented by athermal shutdown circuit which forces the driver outputs into a high impedance state.
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 from 0°C to 70°C and 4.75V to 5.25V supply voltage range.
Features
■ Low Power: ICC = 300μA Typical
■ 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
■ Thermal Shutdown Protection
■ Power-Up/Down Glitch-Free Driver Outputs Permit
Live Insertion or Removal of Package
■ Driver Maintains High Impedance in Three-State or
with the Power Off
■ Combined Impedance of a Driver Output and
Receiver Allows up to 32 Transceivers on the Bus
■ 70mV Typical Input Hysteresis
■ 28ns Typical Driver Propagation Delays with 5ns
Skew
■ Pin Compatible with the SN75180
| Image | Part No | Mfg | Description |  |
Pricing (USD) |
Quantity | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 |
 LTC491CS |
|
IC TXRX RS485 LOW POWER 14-SOIC |
Data Sheet |
|
|
||||||||||
|
LTC491CS#PBF |
|
IC TXRX RS485 LOW POWER 14-SOIC |
Data Sheet |
|
|
||||||||||
|
LTC491CS#TR |
|
IC TXRX RS485 LOW POWER 14-SOIC |
Data Sheet |
|
|
||||||||||
|
LTC491CS#TRPBF |
|
IC TXRX RS485 LOW POWER 14-SOIC |
Data Sheet |
|
|
||||||||||
