Datasheet

SN54AS867, SN54AS869
SN74ALS867A, SN74ALS869, SN74AS867, SN74AS869
SYNCHRONOUS 8-BIT UP/DOWN COUNTERS
SDAS115C – DECEMBER 1982 – REVISED JANUARY 1995
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics (see Figure 1)
PARAMETER
FROM
(
INPUT
)
TO
(
OUTPUT
)
V
CC
= 4.5 V to 5.5 V,
C
L
= 50 pF,
R
L
= 500 Ω,
T
A
= MIN to MAX
†
UNIT
(INPUT)
(OUTPUT)
SN74ALS867A
MIN MAX
f
max
35 MHz
t
PLH
CLK
RCO
4 14
ns
t
PHL
CLK
RCO
4 14
ns
t
PLH
CLK
Any Q
3 16
ns
t
PHL
CLK
An
y
Q
3 16
ns
t
PLH
ENT
RCO
3 14
ns
t
PHL
ENT
RCO
2 9
ns
t
PHL
S0 or S1 (clear mode) Any Q 8 26 ns
t
PLH
S0 or S1
RCO
4 16
ns
t
PHL
(count up/down)
RCO
4 16
ns
t
PLH
S0 or S1 (clear mode) RCO 4 16 ns
†
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.