8254 Просмотр технического описания (PDF) - Intel

Номер в каталоге

Компоненты Описание

производитель

8254

PROGRAMMABLE INTERVAL TIMER

Intel 

WAVEFORMS (Continued)

RECOVERY

CLOCK AND GATE

8254

231164 – 15

Last byte of count being written

A C TESTING INPUT OUTPUT WAVEFORM

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A C TESTING LOAD CIRCUIT

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A C Testing Inputs are driven at 2 4V for a Logic ‘‘1’’ and 0 45V

for a Logic ‘‘0 ’’ Timing measurements are made at 2 0V for a

Logic ‘‘1’’ and 0 8V for a Logic ‘‘0’’

REVISION SUMMARY

The following list represents the key differences be-

tween Rev 004 and Rev 005 of the 8254 Data

Sheet

1 References to and specifications for the 5 MHz

8254-5 are removed Only the 8 MHz 8254 and

the 10 MHz 8254-2 remain in production

CL e 150 pF

CL Includes Jig Capacitance

231164 – 18

21

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