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White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com

White Electronic Designs

WEDPN4M64V-XBX

January 2005

Rev. 8

White Electronic Designs Corp. reserves the right to change products or specifications without notice.

ELECTRICAL CHARACTERISTICS AND RECOMMENDED AC OPERATING CHARACTERISTICS

(NOTES 5, 6, 8, 9, 11)

Parameter

Symbol

-100

-125

-133

Unit

Min

Max

Min

Max

Min

Max

Access time from CK (pos. edge)

CL = 3

7

6

5.5

ns

CL = 2

766

ns

Address hold time

1

1

0.8

ns

Address setup time

22

1.5

ns

CK high-level width

33

2.5

ns

CK low-level width

33

2.5

ns

Clock cycle time (22)

CL = 3

10

8

7.5

ns

CL = 2

13

10

10

CKE hold time

1

1

0.8

ns

CKE setup time

22

1.5

ns

CS#, RAS#, CAS#, WE#, DQM hold time

1

1

0.8

ns

CS#, RAS#, CAS#, WE#, DQM setup time

22

1.5

ns

Data-in hold time

1

1

0.8

ns

Data-in setup time

22

1.5

ns

Data-out high-impedance time

CL = 3 (10)

7

6

5.5

ns

CL = 2 (10)

7

6

6

ns

Data-out low-impedance time

1

1

1

ns

Data-out hold time (load)

3

3

3

ns

Data-out hold time (no load) (26)

1.8

1.8

1.8

ns

ACTIVE to PRECHARGE command

50

120,000

50

120,000

50

120,000

ns

ACTIVE to ACTIVE command period

70

68

68

ns

ACTIVE to READ or WRITE delay

20

20

20

ns

Refresh period (4,096 rows) – Commercial, Industrial

64

64

64

ms

Refresh period (4,096 rows) – Military

16

16

16

ms

AUTO REFRESH period

70

70

70

ns

PRECHARGE command period

20

20

20

ns

ACTIVE bank A to ACTIVE bank B command

20

20

20

ns

Transition time (7)

0.3

1.2

0.3

1.2

0.3

1.2

ns

WRITE recovery time

(23)

1 CK + 7ns

1 CK + 7ns

1 CK + 7.5

—

(24)

15

15

15

ns

Exit SELF REFRESH to ACTIVE command

80

80

75

ns