7

Rev. 1.0 February 1998

MOSEL VITELIC

MSU2052/U2032

AC Characteristics

(16/25/40 MHz, operating conditions; CL for Port 0, ALE and PSEN Outputs=150pF; CL for all Other Outputs=80pF)

Symbol

T LHLL

T AVLL

T LLAX

T LLIV

T LLPL

T PLPH

T PLIV

T PXIX

T PXIZ

T AVIV

T PLAZ

T RLRH

T WLWH

T RLDV

T RHDX

T RHDZ

T LLDV

T AVDV

T LLYL

T AVYL

T QVWH

T QVWX

T WHQX

T RLAZ

T YHLH

T CHCL

T CLCX

T CLCH

T CHCX

T, T CLCL

Parameter

ALE pulse width

Address Valid to ALE low

Address Hold after ALE low

ALE low to Valid Instruction In

ALE low to #PSEN low

#PSEN pulse width

#PSEN low to Valid Instruction In

Instruction Hold after #PSEN

Instruction Float after #PSEN

Address to Valid Instruction In

#PSEN low to Address Float

#RD pulse width

#WR pulse width

#RD low to Valid Data in

Data Hold after #RD

Data Float after #RD

ALE low to Valid Data In

Address to Valid Data In

ALE low to #WR or #RD low

Address Valid to #WR or #RD low

Data Valid to #WR High

Data Valid to #WR transition

Data hold after #WR

#RD low to Address Float

#WR or #RD high to ALE high

Clock fall time

Clock low time

Clock rise time

Clock high time

Clock period

Valid

Cycle

RD/WRT

RD/WRT

RD/WRT

RD

RD

RD

RD

RD

RD

RD

RD

RD

WRT

RD

RD

RD

RD

RD

RD/WRT

RD/WRT

WRT

WRT

WRT

RD

RD/WRT

Min.

115

43

53

53

173

0

365

365

0

178

230

403

38

73

53

Typ. Max

240

177

87

292

10

302

145

490

542

197

72

Unit

nS

nS

nS

nS

nS

nS

nS

nS

nS

nS

nS

nS

nS

nS

nS

nS

nS

nS

nS

nS

nS

nS

nS

nS

nS

nS

nS

nS

nS

nS

Remarks

Operating Conditions

Symbol

t A

V CC3

V CC5

f osc 16

f osc 25

f osc 40

Description

Ambient temperature under bias

Supply voltage

Oscillator Frequency

Min.

0

2.7

4.5

3.0

16

25

Max.

70

4.5

5.5

16

25

40

Unit

V

V

MHz

MHz

MHz

Remarks

U20x2L

U20x2C

U20x2i16

U20x2i25

U20x2i40

C

Typ.

25

3.0

5.0

16

25

40

f osc 16

2xT - 10

T - 20

T - 10

T - 10

3xT - 15

0

6xT - 10

6xT - 10

0

3xT - 10

4xT - 20

7xT - 35

T - 25

T + 10

T - 10

4xT - 10

3xT - 10

T + 25

5xT - 20

10

5xT - 10

2xT + 20

8xT - 10

9xT - 20

3xT + 10

5

T + 10

Variable f osc

Min.

Max.

1/ fosc

Typ.

63