SN54AS867_06 Datasheet, PDF (15/24 Pages) Texas Instruments – SYNCHRONOUS 8-BIT UP/DOWN COUNTERS

SN54AS867, SN54AS869
SN74ALS867A, SN74ALS869, SN74AS867, SN74AS869
SYNCHRONOUS 8-BIT UP/DOWN COUNTERS
SDAS115C – DECEMBER 1982 – REVISED JANUARY 1995
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54AS869
MIN TYP† MAX
SN74AS869
MIN TYP† MAX ^UNIT
VIK
VOH
VOL
II
IIH
VCC = 4.5 V,
VCC = 4.5 V to 5.5 V,
VCC = 4.5 V,
RCO
Other outputs
ENT
Other inputs
VCC = 4.5 V
VCC = 5.5 V,
VCC = 5.5 V,
II = –18 mA
IOH = – 2 mA
IOH = – 2 mA
IOL = 20 mA,
VIL on ENT = 0.7 V
IOL = 20 mA
VI = 7 V
VI = 2.7 V
VCC – 2*
–1.2
VCC – 2
–1.2 V
V
0.34 0.5
0.1
40
20
V
0.34 0.5
0.1 mA
40
µA
20
ENT
IIL
Other inputs ^{VCC = 5.5 V,}
VI = 0.4 V
–4
–4
mA
–2
–2
IO‡
VCC = 5.5 V,
VO = 2.25 V
– 30
– 112 – 30
– 112 mA
ICC
VCC = 5.5 V
134 195
134 195 mA
† _{All typical values are at VCC = 5 V, TA = 25°C.}
‡ _{The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.}
switching characteristics (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
RL = 500 Ω,
TA = MIN to MAX§
SN54AS869 SN74AS869
MIN MAX MIN MAX
fmax*
40
45
tPLH
tPHL
6
35
6
35
CLK
RCO
6
20
6
18
tPLH
tPHL
3
12
3
11
CLK
Any Q
4
16
4
15
tPLH
tPHL
ENT
RCO
3
25
6
21
3
15
6
17
tPLH
tPHL
ENP
RCO
5
27
6
21
5
19
6
18
* 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.}
UNIT
MHz
ns
ns
ns
ns
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