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PDF 74F191PC Data sheet ( Hoja de datos )
| Número de pieza | 74F191PC | |
| Descripción | Up/Down Binary Counter with Preset and Ripple Clock | |
| Fabricantes | Fairchild | |
| Logotipo |  |
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April 1988
Revised July 1999
74F191
Up/Down Binary Counter with Preset and Ripple Clock
General Description
The 74F191 is a reversible modulo-16 binary counter fea-
turing synchronous counting and asynchronous presetting.
The preset feature allows the 74F191 to be used in pro-
grammable dividers. The Count Enable input, the Terminal
Count output and Ripple Clock output make possible a
variety of methods of implementing multistage counters. In
the counting modes, state changes are initiated by the ris-
ing edge of the clock.
Features
s High-Speed—125 MHz typical count frequency
s Synchronous counting
s Asynchronous parallel load
s Cascadable
Ordering Code:
Order Number Package Number
Package Description
74F191SC
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
74F191SJ
M16D
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74F191PC
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbols
Connection Diagram
IEEE/IEC
© 1999 Fairchild Semiconductor Corporation DS009495
www.fairchildsemi.com
1 page  
AC Electrical Characteristics
Symbol
Parameter
fMAX
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
Maximum Count Frequency
Propagation Delay
CP to Qn
Propagation Delay
CP to TC
Propagation Delay
CP to RC
Propagation Delay
CE to RC
Propagation Delay
U/D to RC
Propagation Delay
U/D to TC
Propagation Delay
Pn to Qn
Propagation Delay
PL to Qn
Propagation Delay
Pn to TC
Propagation Delay
Pn to RC
Propagation Delay
PL to TC
Propagation Delay
PL to RC
TA = +25°C
VCC = +5.0V
CL = 50 pF
Min Typ Max
100 125
3.0 5.5 7.5
5.0 8.5 11.0
6.0
10.0
13.0
5.0 8.5 11.0
3.0 5.5 7.5
3.0 5.0 7.0
3.0 5.0 7.0
3.0 5.5 7.0
7.0 11.0 18.0
5.5 9.0 12.0
4.0 7.0 10.0
4.0 6.5 10.0
3.0 4.5 7.0
6.0
10.0
13.0
5.0 8.5 11.0
5.5 9.0 12.0
5.0 14.0
6.5 13.0
6.5 19.0
6.0 14.0
8.0 16.5
6.0 13.5
10.0
9.0
20.0
15.5
TA = −55°C to +125°C
VCC = +5.0V
CL = 50 pF
Min Max
75
3.0 9.5
5.0 13.5
6.0 16.5
5.0 13.5
3.0 9.5
3.0 9.0
3.0 9.0
3.0 9.0
7.0 22.0
5.5 14.0
4.0 13.5
4.0 12.5
3.0 9.0
6.0 16.0
5.0 13.0
5.5 14.5
TA = 0°C to +70°C
VCC = +5.0V
CL = 50 pF
Min Max
90
3.0 8.5
5.0 12.0
6.0 14.0
5.0 12.0
3.0 8.5
3.0 8.0
3.0 8.0
3.0 8.0
7.0 20.0
5.5 13.0
4.0 11.0
4.0 11.0
3.0 8.0
6.0 14.0
5.0 12.0
5.5 13.0
5.0 15.0
6.0 14.0
6.5 20.0
6.0 15.0
8.0 17.5
6.0 14.5
10.0 21.0
9.0 16.0
AC Operating Requirements
Symbol
Parameter
tS(H)
tS(L)
tH(H)
tH(L)
tS(L)
tH(L)
tS(H)
tS(L)
tH(H)
tH(L)
tW(L)
tW(L)
tREC
Setup Time, HIGH or LOW
Pn to PL
Hold Time, HIGH or LOW
Pn to PL
Setup Time LOW
CE to CP
Hold Time LOW
CE to CP
Setup Time, HIGH or LOW
U/D to CP
Hold Time, HIGH or LOW
U/D to CP
PL Pulse Width LOW
CP Pulse Width LOW
Recovery Time
PL to CP
TA = +25°C
VCC = +5.0V
Min Max
4.5
4.5
2.0
2.0
10.0
TA = −55°C to +125°C
VCC = +5.0V
Min Max
6.0
6.0
2.0
2.0
10.5
TA = 0°C to +70°C
VCC = +5.0V
Min Max
5.0
5.0
2.0
2.0
10.0
000
12.0
12.0
0
0
6.0
5.0
6.0
12.0
12.0
0
0
8.5
7.0
7.5
12.0
12.0
0
0
6.0
5.0
6.0
Units
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
Units
ns
ns
ns
ns
ns
ns
5 www.fairchildsemi.com
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet 74F191PC.PDF ] | |
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