Datasheet

SN54AS867, SN54AS869
SN74ALS867A, SN74ALS869, SN74AS867, SN74AS869
SYNCHRONOUS 8-BIT UP/DOWN COUNTERS
SDAS115C – DECEMBER 1982 – REVISED JANUARY 1995
15
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54AS869 SN74AS869
UNIT
PARAMETER
TEST
CONDITIONS
MIN TYP
†
MAX MIN TYP
†
MAX
UNIT
V
IK
V
CC
= 4.5 V, I
I
= –18 mA –1.2 –1.2 V
V
OH
V
CC
= 4.5 V to 5.5 V, I
OH
= –2 mA V
CC
–2
V
V
OH
V
CC
= 4.5 V, I
OH
= –2 mA V
CC
–2*
V
V
OL
RCO
V
CC
= 4.5 V
I
OL
= 20 mA,
V
IL
on ENT
= 0.7 V
0.34 0.5
V
OL
Other outputs
CC
I
OL
= 20 mA 0.34 0.5
I
I
V
CC
= 5.5 V, V
I
= 7 V 0.1 0.1 mA
I
IH
ENT
V
CC
=55V
V
I
=27V
40 40
µA
I
IH
Other inputs
V
CC
=
5
.
5
V
,
V
I
=
2
.
7
V
20 20
µ
A
I
IL
ENT
V
CC
=55V
V
I
=04V
–4 –4
mA
I
IL
Other inputs
V
CC
=
5
.
5
V
,
V
I
=
0
.
4
V
–2 –2
mA
I
O
‡
V
CC
= 5.5 V, V
O
= 2.25 V –30 –112 –30 –112 mA
I
CC
V
CC
= 5.5 V 134 195 134 195 mA
†
All typical values are at V
CC
= 5 V, T
A
= 25°C.
‡
The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, I
OS
.
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)
SN54AS869 SN74AS869
MIN MAX MIN MAX
f
max
* 40 45 MHz
t
PLH
CLK
RCO
6 35 6 35
ns
t
PHL
CLK
RCO
6 20 6 18
ns
t
PLH
CLK
Any Q
3 12 3 11
ns
t
PHL
CLK
An
y
Q
4 16 4 15
ns
t
PLH
ENT
RCO
3 25 3 15
ns
t
PHL
ENT
RCO
6 21 6 17
ns
t
PLH
ENP
RCO
5 27 5 19
ns
t
PHL
ENP
RCO
6 21 6 18
ns
* On products compliant to MIL-STD-883, Class B, this parameter is based on characterization data but is not production tested.
§
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.