Quad Low Power
486 is a low power differential bus/line driver
designed for multipoint data transmission standard RS485
applications with extended common-mode range (12V to
–7V). It also meets RS422 requirements.
The CMOS design offers signiﬁcant power savings over
its bipolar counterpart without sacriﬁcing ruggedness
against overload or ESD damage.
The driver features 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 a thermal
shutdown circuit which forces the driver outputs into a
high impedance state.
Both AC and DC speciﬁcations are guaranteed from 0°C
to 70°C (Commercial), –40°C to 85°C (Industrial), over
the 4.75V to 5.25V supply voltage range.
RS485 Length Speciﬁcation
Very Low Power: I
= 110µA Typ
Designed for RS485 or RS422 Applications
Single 5V Supply
–7V to 12V Bus Common-Mode Range Permits ±7V
GND Difference Between Devices on the Bus
Thermal Shutdown Protection
Power-Up/Down Glitch-Free Driver Outputs Permit
Live Insertion/Removal of Package
Driver Maintains High Impedance in Three-State or
with the Power Off
28ns Typical Driver Propagation Delays with 5ns
Pin Compatible with the SN75172, DS96172,
µA96172, and DS96F172
Low Power RS485/RS422 Drivers
4000 FT BELDEN 9841
DATA RATE (bps)
* APPLIES FOR 24 GAUGE, POLYETHYLENE
DIELECTRIC TWISTED PAIR
CABLE LENGTH (FT)
100k 1M 10M
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