HD74LS85 Datasheet, PDF (5/7 Pages) Hitachi Semiconductor – 4-bit Magnitude Comparators

HD74LS85
Testing Table
Item
t_PLH
t_PHL
A₃
IN
4.5 v
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
B₃
4.5 v
IN
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
A₂
4.5 v
GND
IN
4.5 v
GND
GND
GND
GND
GND
GND
GND
GND
GND
B₂
GND
4.5 v
4.5 v
IN
GND
GND
GND
GND
GND
GND
GND
GND
GND
Inputs
A₁
B₁
GND GND
GND GND
4.5 v GND
GND 4.5 v
IN 4.5 v
4.5 v IN
GND GND
GND GND
GND GND
GND GND
GND GND
GND GND
GND GND
A₀
GND
GND
GND
GND
4.5 v
GND
IN
4.5 v
IN
4.5 v
GND
GND
GND
B₀
GND
GND
GND
GND
GND
4.5 v
4.5 v
IN
4.5 v
IN
GND
GND
GND
A>B
GND
GND
GND
GND
GND
GND
4.5 v
GND
GND
GND
IN
GND
GND
A=B
GND
GND
GND
GND
GND
GND
GND
GND
4.5 v
4.5 v
GND
IN
GND
Output waveforms
A<B A>B A=B A<B
GND A
—
B
GND B
—
A
GND A
—
B
GND B
—
A
GND A
—
B
GND B
—
A
GND A
—
B
4.5 v B
—
A
GND —
A
B
GND B
A
—
GND —
—
B
GND B
A
B
IN
B
—
—
Rev.2.00, Feb.18.2005, page 5 of 6