MK31VT872A-8YC

Ñ98.06.26Ò

AC CHARACTERISTIC

(Vcc=3.3V

± 0.3V,Ta = 0 to 70 °C)

NOTE

1,2

.

Parameter

Symbol

Module Spec.

Unit

Note

Min.

Max.

Clock Cycle Time

CL=3

tCC

8

-

ns

CL=2

12

-

ns

Access Time from Clock

CL=3

tAC

-

6

ns

3,4

CL=2

-

10

ns

3,4

Clock "H" Pulse Time

tCH

3

-

ns

Clock "L" Pulse Time

tCL

3

-

ns

Input Setup Time

tSI

2

-

ns

Input Hold Time

tHI

1

-

ns

Output Low

Impedance Time from Clock

tOLZ

3

-

ns

Output High Impedance Time from Clock

tOHZ

-

8

ns

Output Hold from Clock

tOH

3

-

ns

3

/RAS Cycle Time

tRC

80

-

ns

/RAS Precharge Time

tRP

30

-

ns

/RAS Active Time

tRAS

48

100,000

ns

/RAS to /CAS Delay Time

tRCD

20

-

ns

Write Recovery Time

tWR

8

-

ns

/RAS to /RAS Bank Active Delay Time

tRRD

16

-

ns

Refresh Time

tREF

-

64

ms

Power-down Exit Set-up Time

tPDE

tSI+1CLK

-

ns

Input Level Transition Time

tT

-

3

ns

/CAS to /CAS Delay Time (Min)

ICCD

1

Cycle

Clock Disable Time from CKE

ICKE

1

Cycle

Data Output High Impedance Time from

IDOZ

2

Cycle

Data Input Mask Time from DQMB

IDOD

0

Cycle

Data Input Time from Write Command

IDWD

0

Cycle

Data Output High Inpedance

CL=3

IROH

3

Cycle

Time from Precharge Command

CL=2

2

Cycle

Active Command Input Time from MODE

IMRD

2

Cycle

Write Command Input Time from Output

tOWD

2

Cycle

NOTES:

1)

AC measurements assume tT=1ns.

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

(R Load is 50ohm).

4)

An access time is measured at 1.4V.

5)

ÌÒÑÍÒÑ

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OUTPUT LOAD

50

Ω

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