87C196CA87C196CB

Test Conditions Capacitance Load on All Pins e 100 pF Rise and Fall Times e 10 ns

The 87C196CACB will meet these specifications

Symbol

Parameter

Min

Max

Units

Frequency on XTAL1

40

20

500

250

ns

XTAL1 High to CLKOUT High or Low

a

20

110

ns

440

m

s

CLKOUT Period

ns

CLKOUT High Period

ns

CLKOUT Low to ALEADV High

b

15

a

10

ns

ALEADV Low to CLKOUT High

b

20

a

15

ns

ALEADV Cycle Time

ALEADV High Time

ns

Address Valid to ALE Low

ns

Address Hold After ALEADV Low

ns

ALEADV Low to RD Low

ns

RD Low to CLKOUT Low

CA

a

4

a

30

ns

CB

b

8

a

20

ns

RD Low Period

RD High to ALEADV High

RD Low to Address Float

5

ns

ALEADV Low to WR Low

ns

CLKOUT Low to WR Low

b

5

a

25

ns

Data Valid before WR High

ns

CLKOUT High to WR High

b

10

a

15

ns

WR Low Period

CB

CA

Data Hold after WR High

ns

WR High to ALEADV High

BHE INST Hold after WR High

ns

AD8 – 15 Hold after WR High

BHE INST Hold after RD High

ns

AD8 – 15 Hold after RD High

NOTES

1 Testing performed at 40 MHz however the device is static by design and will typically operate below 1 Hz

2 Typical specifications not guaranteed

3 Assuming back-to-back bus cycles

4 8-bit bus only

programming the UPROM location 0778H with the value 0004H Programming the CDE bit enables oscillator fail detec-

tion

16