DS96F172M Datasheet, PDF (1/11 Pages) National Semiconductor (TI) – EIA-485/EIA-422 Quad Differential Drivers

July 2000
DS96F172M/DS96F174C/DS96F174M
EIA-485/EIA-422 Quad Differential Drivers
General Description
The DS96F172 and the DS96F174 are high speed quad
differential line drivers designed to meet EIA-485 Standards.
The DS96F172 and the DS96F174 offer improved perfor-
mance due to the use of L-FAST bipolar technology. The use
of LFAST technology allows the DS96F172 and DS96F174
to operate at higher speeds while minimizing power con-
sumption.
The DS96F172 and the DS96F174 have TRI-STATE^® out-
puts and are optimized for balanced multipoint data bus
transmission at rates up to 15 Mbps. The drivers have wide
positive and negative common mode range for multipoint
applications in noisy environments. Positive and negative
current-limiting is provided which protects the drivers from
line fault conditions over a +12V to −7.0V common mode
range. A thermal shutdown feature is also provided. The
DS96F172 features an active high and active low Enable,
common to all four drivers. The DS96F174 features separate
active high Enables for each driver pair.
Features
n Meets EIA-485 and EIA-422 standards
n Monotonic differential output switching
n TRI-STATE outputs
n Designed for multipoint bus transmission
n Common mode output voltage range: −7.0V to +12V
n Operates from single +5.0V supply
n Reduced power consumption
n Thermal shutdown protection
n DS96F172 and DS96F174 are lead and function
compatible with the SN75172/174 or the
AM26LS31/MC3487
n Military temperature range available
n Qualified for MIL-STD-883C
n Standard military drawings available (SMD)
n Available in DIP (J), LCC (E), and Flatpak (W) packages
Logic Diagrams
DS96F172
DS96F174
00962514
00962515
Function Tables (Each Driver)
Input
A
H
L
H
L
X
DS96F172
Enable
E
E
H
X
H
X
X
L
X
L
L
H
Outputs
Y
Z
H
L
L
H
H
L
L
H
Z
Z
DS96F174
Input
Enable
A
E
H
H
L
H
X
L
H = High Level
L = Low Level
X = Don’t Care
Z = High Impedance (Off)
Outputs
Y
Z
H
L
L
H
Z
Z
TRI-STATE^® is a registered trademark of National Semiconductor Corporation.
© 2004 National Semiconductor Corporation DS009625
www.national.com