Datasheet
74F579
(Product Specification)
18-Dec-00, 14 pages, 124 kB
74F579 - 8-bit bidirectional binary counter (3-State)
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General description
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Features
- Products/packages
- Quality/reliability/chemical content
- Pricing/ordering/availability
- Samples
- Discontinued information
- Applications
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Block diagrams/pinning
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Design support
- Parametrics/similar products
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Print/email
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Disclaimers
This product has been withdrawn. Please contact your local
Sales or Distributor office
for more details.All information hereunder is subject to the subsequent disclaimers
General description
The 74F579 is a fully synchronous 8-stage Up/Down Counter with
multiplexed 3-State I/O ports for bus-oriented applications. It
features a preset capability for programmable operation, carry
look-ahead for easy cascading and a U/D input to control the
direction of counting. All state changes, except for the case of
asynchronous reset, are initiated by the rising edge of the clock.
TC output is not recommended for use as a clock or asynchronous
reset due to the possibility of decoding spikes.
Features
- Fully synchronous operation
- Multiplexed 3-State I/O ports for bus oriented applications
- Built in cascading carry capability
- U/D pin to control direction of counting
- Separate pins for Master reset and Synchronous operation
- Center power pins to reduce effects of package inductance
- Count frequency 115 MHz Typ
- Supply current 100 mA Typ
- See 74F269 for 24-pin separate I/O port version
- See 74F779 for 16-pin version
Block diagrams/pinning

Design support
Application Notes