SN54AS867, SN54AS869
SN74ALS867A, SN74ALS869, SN74AS867, SN74AS869
SYNCHRONOUS 8-BIT UP/DOWN COUNTERS
SDAS115C – DECEMBER 1982 – REVISED JANUARY 1995
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Input voltage, V
I
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Operating free-air temperature range, T
A
: SN54AS867 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 125°C
SN74AS867 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C
† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
recommended operating conditions
SN54AS867
MIN
VCC
VIH
VIL
IOH
IOL
fclock*
tw(clock)*
tw(clear)*
Supply voltage
High-level input voltage
Low-level input voltage
High-level output current
Low-level output current
Clock frequency
Pulse duration, CLK high or low
Pulse duration of clear pulse, S0 and S1 low
Data inputs A – H
ENP or ENT
tsu*
S0 low and S1 high (load)
Set p time before CLK↑
Setup
S0 and S1 low (clear)
S0 high and S1 low (count down)
S0 and S1 high (count up)
th*
tskew*
Hold time after CLK↑
Data inputs A – H
Skew time between S0 and S1
(maximum to avoid inadvertent clear)
0
12.5
12.5
5
9
11
11
42
42
0
8
4.5
2
0.8
–2
20
40
0
10
10
4
8
10
10
40
40
0
7
ns
ns
°C
ns
NOM
5
MAX
5.5
SN74AS867
MIN
4.5
2
0.8
–2
20
50
NOM
5
MAX
5.5
UNIT
V
V
V
mA
mA
MHz
ns
ns
TA
Operating free-air temperature
– 55
125
0
70
* On products compliant to MIL-STD-883, Class B, this parameter is based on characterization data but is not production tested.
12
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