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SN75LBC170DB-SN75LBC170DBR-SN75LBC170DBRG4
Triple Differential Transceivers
Designed for TIA/EIA-485, TIA/EIA-422, ISO8482, and ANSI X3.277 (HVD SCSI Fast−20)
Applications Common-Mode Bus Voltage RangeVto 12 V ESD Protection on Bus Terminals
Exceeds 12 kV Driver Output Current up to ±60 mA Thermal Shutdown Protection Driver Positive and Negative Current
Limiting Power-Up, Power-Down Glitch-Free
Operation Pin-Compatible With the SN75ALS170 Available in Shrink Small-Outline Package
descriptionThe SN65LBC170 and SN75LBC170 are
monolithic integrated circuits designed for
bidirectional data communication on multipoint
bus-transmission lines. Potential applications
include serial or parallel data transmission, cabled
peripheral buses with twin axial, ribbon, or
twisted-pair cabling. These devices are suitable
for FAST-20 SCSI and can transmit or receive
data pulses as short as 25 ns, with skew less
than 3 ns.
These devices combine three 3-state differential
line drivers and three differential input line
receivers, all of which operate from a single 5-V
power supply.
The driver differential outputs and the receiver
differential inputs are connected internally to form
three differential input/output (I/O) bus ports that
are designed to offer minimum loading to the bus
whenever the driver is disabled or VCC = 0. These
ports feature a wide common-mode voltage range
making the device suitable for party-line
applications over long cable runs.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
†The signaling rate of a line is the number of voltage transitions that are made per second expressed in the units bps (bits per second).
logic diagram
1DIR
2DIR
3DIR1DIR
GND
2DIR
3DIR
VCC
SN65LBC170DW (marked as 65LBC170)
SN75LBC170DW (marked as 75LBC170)
(TOP VIEW)GND
2DIR
3DIR
VCC
NC − No internal connection
