MK31VT864-10YE (98.09.03)

Page 8/11

AC CHARACTERISTIC

(Vcc = 3.3V ± 0.3V, Ta = 0 ~ 70°C)

NOTE

1, 2

.

Parameter

Symbol

Module Spec.

Unit

Note

Min.

Max.

CL=3

10

-ns

Clock Cycle Time

CL=2

15

-ns

CL=3

-

9ns

3, 4

Access Time from Clock

CL=2

-

9ns

3, 4

Clock "H" Pulse Time

3

-ns

Clock "L" Pulse Time

3

-ns

Input Setup Time

3

-ns

Input Hold Time

1

-ns

Output Low

Impedance Time from Clock

3

-ns

Output High Impedance Time from Clock

-

8ns

Output Hold from Clock

3

-ns

3

/RAS Cycle Time

90

-ns

/RAS Precharge Time

30

-ns

/RAS Active Time

60

1,000,000

ns

/RAS to /CAS Delay Time

30

-ns

Write Recovery Time

15

-ns

/RAS to /RAS Bank Active Delay Time

20

-ns

Refresh Time

-

64

ms

Power-down Exit Set-up Time

-ns

Input Level Transition Time

-

3ns

/CAS to /CAS Delay Time (Min)

1

Cycle

Clock Disable Time from CKE

1

Cycle

Data Output High Impedance Time from UDQM, LDQM

2

Cycle

Data Input Mask Time from DQMB

0

Cycle

Data Input Time from Write Command

0

Cycle

Data Output High Impedance Time from Precharge

Command.

2

Cycle

Active Command Input Time from MODE

Register Set Command Input (Min)

3

Cycle

Write Command Input Time from Output

2

Cycle

NOTES:

1)

2)

The reference level for timing of input signals is 1.4V.

3)

This parameter is measured with a load circuit equivalent to 1 TTL load and 50pF

4)

An access time is measured at 1.4V.

5)

OUTPUT

50pF

OUTPUT LOAD

50

Ω

1.4v