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54AC169L View Datasheet(PDF) - National ->Texas Instruments

Part Name54AC169L National-Semiconductor
National ->Texas Instruments National-Semiconductor
Description4-Stage Synchronous Bidirectional Counter
54AC169L Datasheet PDF : 10 Pages
1 2 3 4 5 6 7 8 9 10
AC Operating Requirements (Continued)
Symbol
Parameter
VCC
(V)
(Note 9)
th
Hold Time, HIGH or LOW
3.3
CET to CP
5.0
ts
Setup Time,
3.3
HIGH or LOW
5.0
PE to CP
th
Hold Time, HIGH or LOW
3.3
PE to CP
5.0
ts
Setup Time,
3.3
HIGH or LOW
5.0
U/D to CP
th
Hold Time, HIGH or LOW
3.3
U/D to CP
5.0
tw
CP Pulse Width,
3.3
HIGH or LOW
5.0
Note 9: Voltage Range 3.3 is 3.3V ±0.3V
Voltage Range 5.0 is 5.0V ±0.5V
54AC
TA = −55˚C
to +125˚C
CL = 50 pF
Guaranteed
Minimum
0.5
2.5
8.5
6.5
0.5
2.0
13.0
9.0
0.5
2.0
5.0
5.0
AC Electrical Characteristics
Symbol
fmax
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
Parameter
Maximum Clock
Frequency
Propagation Delay
CP to Qn
(PE HIGH or LOW)
Propagation Delay
CP to Qn
(PE HIGH or LOW)
Propagation Delay
CP to TC
Propagation Delay
CP to TC
Propagation Delay
CET to TC
Propagation Delay
CET to TC
Propagation Delay
U/D to TC
Propagation Delay
U/D to TC
VCC
(V)
(Note 10)
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
54ACT
TA = −55˚C
to +125˚C
CL = 50 pF
Min
Max
75
1.5
12.5
1.5
12.5
1.5
16.5
1.5
16.5
1.5
13.5
1.5
13.5
1.5
14.5
1.5
14.5
7
Fig.
Units
No.
ns
ns
ns
ns
ns
ns
Fig.
Units
No.
MHz
ns
ns
ns
ns
ns
ns
ns
ns
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General Description
The ’AC/’ACT169 is fully synchronous 4-stage up/down counter. The ’AC/’ACT169 is a modulo-16 binary counter. It features a preset capability for programmable operation, carry lookahead for easy cascading and a U/D input to control the direction of counting. All state changes, whether in counting or parallel loading, are initiated by the LOW-to-HIGH transition of the Clock.

Features
■ ICC reduced by 50%
■ Synchronous counting and loading
■ Built-In lookahead carry capability
■ Presettable for programmable operation
■ Outputs source/sink 24 mA
■ ’ACT has TTL-compatible inputs
■ Standard Microcircuit Drawing (SMD) 5962-91603

 

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