87C196 datasheet(25/34 Pages) INTEL

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87C196KT87C196KS

EXTERNAL CLOCK DRIVE

Symbol

Parameter

Min

Max

Units

1TXLXL

Oscillator Frequency

MHz

TXLXL

Oscillator Period (TOSC)

625

250

TXHXX

High Time

035 c TOSC

065 TOSC

TXLXX

Low Time

035 c TOSC

065 TOSC

TXLXH

Rise Time

TXHXL

Fall Time

EXTERNAL CLOCK DRIVE WAVEFORMS

270999 – 16

AC TESTING INPUT OUTPUT WAVEFORMS

270999 – 17

AC Testing inputs are driven at 35V for a logic ‘‘1’’ and

045V for a logic ‘‘0’’ Timing measurements are made

at 20V for a logic ‘‘1’’ and 08V for logic ‘‘0’’

FLOAT WAVEFORMS

270999 – 18

For timing purposes a Port Pin is no longer floating

when a 150 mV change from load voltage occurs and

begins to float when a 150 mV change from the loading

VOH VOL level occurs IOL IOH s 15 mA

THERMAL CHARACTERISTICS

Device and Package

iJA

iJC

AN87C196KTKS

365 CW

13 CW

(68-Lead PLCC)

NOTES

1 iJA e Thermal resistance between junction and the sur-

rounding environmental (ambient) Measurements are tak-

en 1 ft away from case in air flow environment iJC e

Thermal resistance between junction and package surface

(case)

2 All values of iJA and iJC may fluctuate depending on

the environment (with or without airflow and how much air-

flow) and device power dissipation at temperature of oper-

ation Typical variations are g2 CW

3 Values listed are at a maximum power dissipation of

050W

EXPLANATION OF AC SYMBOLS

Each symbol is two pairs of letters prefixed by ‘‘T’’

for time The characters in a pair indicate a signal

and its condition respectively Symbols represent

the time between the two signalcondition points

Conditions

Signals

HHigh

AAddress

HAHLDA

LLow

BBHE

LALEADV

VValid

BRBREQ

QData Out

XNo Longer

CCLKOUT

RDRD

Valid

DDATA

WWR WRH WRI

ZFloating

GBuswidth

XXTAL1

HHOLD

YREADY

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