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Part Number: 74AC191SC
Description: The AC191 is a reversible modulo 16 binary counter. It features synchronous counting and asynchronous ...
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74AC191SC
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DataSheet
General Description
74AC191SC General Description
The AC191 is a reversible modulo 16 binary counter. It features synchronous counting and asynchronous presetting. The preset feature allows the AC191 to be used in programmable dividers. The Count Enable input, the Terminal Count output and the Ripple Clock output make possible a variety of methods of implementing multistage counters. In the counting modes, state changes are initiated by the rising edge of the clock.
74AC191SC Maximum Ratings
Supply Voltage (VCC).................. −0.5V to +7.0V
DC Input Diode Current (IIK)
VI = −0.5V ......................................... −20 mA
VI = VCC + 0.5V................................. +20 mA
DC Input Voltage (VI) .........−0.5V to VCC + 0.5V
DC Output Diode Current (IOK)
VO = −0.5V........................................ −20 mA
VO = VCC + 0.5V +20 mA
DC Output Voltage (VO) ......−0.5V to VCC + 0.5V
DC Output Source
or Sink Current (IO)............................ ±50 mA
DC VCC or Ground Current
per Output Pin (ICC or IGND)............... ±50 mA
Storage Temperature (TSTG)... −65°C to +150°C
Junction Temperature (TJ)
PDIP ......................................................140°C
DC Input Diode Current (IIK)
VI = −0.5V ......................................... −20 mA
VI = VCC + 0.5V................................. +20 mA
DC Input Voltage (VI) .........−0.5V to VCC + 0.5V
DC Output Diode Current (IOK)
VO = −0.5V........................................ −20 mA
VO = VCC + 0.5V +20 mA
DC Output Voltage (VO) ......−0.5V to VCC + 0.5V
DC Output Source
or Sink Current (IO)............................ ±50 mA
DC VCC or Ground Current
per Output Pin (ICC or IGND)............... ±50 mA
Storage Temperature (TSTG)... −65°C to +150°C
Junction Temperature (TJ)
PDIP ......................................................140°C
74AC191SC Features
ICC reduced by 50%
High speed-133 MHz typical count frequency
Synchronous counting
Asynchronous parallel load
Cascadable
Outputs source/sink 24 mA
High speed-133 MHz typical count frequency
Synchronous counting
Asynchronous parallel load
Cascadable
Outputs source/sink 24 mA
74AC191SC Connection Diagram
74AC191SC
PDF/DataSheet Download
- Datasheet: 74AC191SC
- File Size: 117976 KB
- Manufacturer: FAIRCHILD [Fairchild Semiconductor]
- Click here to Download
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