80C187

AC Characteristics

All timings are measured at 15V unless otherwise specified

125 MHz

16 MHz

Test

Symbol

Parameter

Min

Max

Min

Max

Conditions

(ns)

(ns)

(ns)

(ns)

Data Setup to NPWR

43

33

Data Hold from NPWR

14

14

NPRD Active Time

59

54

NPWR Active Time

59

54

Command Valid to NPWR

00

Command Valid to NPRD

00

Min Delay from PEREQ Active

40

30

to NPRD Active

Command Hold from NPWR

12

8

Command Hold from NPRD

12

8

NPRD NPWR RESET to

46

38

Note 1

CLK Setup Time

NPRD NPWR RESET from

26

18

Note 1

CLK Hold Time

RESET to CLK Setup

21

19

Note 1

RESET from CLK Hold

14

9

Note 1

Command Inactive Time

Write to Write

69

59

Read to Read

69

59

Read to Write

69

59

Write to Read

69

59

NOTE

1 This is an asynchronous input This specification is given for testing purposes only to assure recognition at a specific CLK

edge

22