UT80C196 datasheet(26/42 Pages) AEROFLEX

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5.0 AC CHARACTERISTICS READ CYCLE

DD = 5.0V ±10%) (TC = -55°C to +125 °C for "C" screening and -40°C to +125 °C for "W" screening)

SYMBOL

PARAMETER

MINIMUM

MAXIMUM

UNIT

tAVYV

Address VALID to READY setup

OSC - 30

tYLYH

Non-READY time

No upper limit

tCLYX

1,5

READY hold after CLKOUT low

2T OSC - 20

tLLYX

1,5

READY hold after ALE low

TOSC

3T OSC - 20

AVGV

Address valid to BUSWIDTH setup

2T OSC - 30

CLGX

BUSWIDTH hold after CLKOUT low

tAVDV

2,5

Address valid to input data valid

3T OSC - 29

tRLDV

RD Active to input data valid

5 (see Note 5)

OSC - 26

tCLDV

CLKOUT low to input data valid

OSC - 26

tRHDZ

End of RD to input data float

TOSC -10

RXDX

Data hold after RD inactive

TOSC -10

OSC

Frequency on XTAL1

1 (see Note 7)

20 (see Note 6)

Mhz

TOSC

XTAL1 period (1/fOSC)

50 (see Note 6)

1000 (see Note 7)

XHCH

XTAL1 high to CLKOUT high or low

+25

CLCL

CLKOUT cycle time

2TOSC Typical

tCHCL

CLKOUT high period

TOSC - 10

TOSC +10

CLLH

CLKOUT falling edge to ALE rising

-5

+15

LLCH

ALE falling edge to CLKOUT rising

-10

+10

tLHLH

2 , 6

ALE cycle time

4TOSC Typical

tLHLL

ALE high period

OSC - 10

OSC +15

tAVLL

Address setup to ALE falling edge

OSC - 15

tLLAX

Address hold after ALE falling edge

TOSC - 20

TOSC +5

LLRL

ALE falling edge to RD falling edge

OSC - 5

OSC +10

tRLCL

RD low to CLKOUT falling edge

-5

+10

tRLRH

RD low period

TOSC - 5

RHLH

3,5

RD rising edge to ALE rising edge

TOSC-10

TOSC +10

RLAZ

RD low to address float

-5

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