AUTOMOTIVE 87C5487C54-20

12 MHz Oscillator

Variable Oscillator

Symbol

Parameter

87C5487C54-20

Units

Min

Max

Min

Max

RD Pulse Width

400

ns

WR Pulse Width

400

ns

RD Low to Valid

252

ns

Data In

Data Hold After RD

00

ns

High

Data Float After RD

107

ns

High

ALE Low to Valid

517

ns

Data In

Address Valid to

585

ns

Valid Data In

ALE Low to RD or

200

300

ns

WR Low

Address Valid to

203

ns

WR Low

Data Valid before

33

ns

WR Low

Data Hold after WR

33

ns

High

Data Valid to WR

433

ns

High

RD Low to Address

0

0

ns

Float

RD or WR High to

43

123

ns

ALE High

NOTE

Timings speicified for the 87C54-20 are valid at 20 MHz only For timings below 20 MHz use the 87C54 timings

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