name: D71054C function: Programmable Interval Timer package: DIP24,24 manufacturer: NEC added-by: Jaap van Ganswijk comment: NEC version of the Intel 8254 +--()--+ D7 | 1 24| VCC D6 | 2 23| /WR D5 | 3 22| /RD D4 | 4 21| /CS D3 | 5 20| A1 D2 | 6 19| A0 D1 | 7 18| CLK2 D0 | 8 17| OUT2 CLK0 | 9 16| GATE2 OUT0 |10 15| CLK1 GATE0 |11 14| GATE1 GND |12 13| OUT1 +------+ This information was added by a third party and may be incorrect. This pinout came from the Chipdir: http://www.chipdir.org/