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