N74F1779

·Multiplexed 3-State I/O ports for bus oriented applications
·Built-in look-ahead carry capability
·Center power pins to reduce effects of package inductance
·Count frequency 145MHz typical
·Supply current 90mA typical
·See 74F269 for 24-pin separate I/O port version
·See 74F579 for 20-pin version
·See 74F779 for 16-pin version with abbreviated function table

(Operation beyond the limits set forth in this table may impair the useful life of the device.
Unless otherwise noted these limits are over the operating free-air temperature range.)

The 74F1779 is a fully synchronous 8-stage up/down counter with multiplexed 3-State I/O ports for bus-oriented applications. All control functions (hold, count up, count down, synchronous load) are controlled by two mode pins (S0, S1). The 74F1779 also features carry look-ahead for easy cascading. All state changes are initiated by the rising edge of the clock. When CET   is High, the data outputs are  is held High. the TC output is not held in their current state and TC recommended for use as a clock or asynchronous reset due to the possibility of decoding spikes.

The 74F1779 differs from 74F779 in that it has an additional hold mode as described in the Function Table.