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SN75LBC174A-SN75LBC174A16DW-SN75LBC174A16DWR-SN75LBC174ADW-SN75LBC174ADWG4-SN75LBC174ADWR-SN75LBC174ADWRG4-SN75LBC174AN
Quadruple RS-485 Differential Line Drivers
1,2EN
GND
VCC
3,4EN
N PACKAGE
(TOPVIEW) logic diagram (positive logic)1
1,2EN4
3,4EN1215
3,4EN
logic diagram (positive logic)
VCC
3,4EN VIEW)
1,2EN
GND
VCC
3,4EN
16-DW PACKAGE
(TOP VIEW)
SN65LBC174A
SN75LBC174A
www.ti.com SLLS446F –OCTOBER 2000–REVISED OCTOBER 2009
QUADRUPLE RS-485 DIFFERENTIAL LINE DRIVERS
Checkfor Samples: SN65LBC174A SN75LBC174A
1FEATURES • Output ESD Protection:12 kV Designed for TIA/EIA-485, TIA/EIA-422 and • Driver Positive- and Negative-Current Limiting
ISO 8482 Applications • Power-Up and Power-Down Glitch-Free for Signaling Rates(1)
upto30 Mbps Line Insertion Applications Propagation Delay Times<11 ns • Thermal Shutdown Protection Low Standby Power Consumption 1.5-mA Max • Industry Standard Pin-Out, Compatible With
SN75174, MC3487, DS96174, LTC487, and(1) The signaling rateofa lineisthe numberof voltage
transitions thatare madeper second expressedinthe units
MAX3042bps (bitsper second).
DESCRIPTIONThe SN65LBC174A and SN75LBC174A are quadruple differential line drivers with 3-state outputs, designed for
TIA/EIA-485 (RS-485), TIA/EIA-422 (RS-422), and ISO 8482 applications.
These devices are optimized for balanced multipoint bus transmissionat signaling rates upto 30 million bits per
second. The transmission media may be printed-circuit board traces, backplanes,or cables. The ultimate rate
and distanceof data transferis dependent upon the attenuation characteristicsof the media and the noise
couplingto the environment.
