Aeroflex Circuit Technology

SCD3750 REV A 8/31/98

Plainview NY (516) 694-6700

4

Setup Time, WE Low before CAS Low (early-write operation only)

0

-

ns

Hold Time, Column Address after CAS Low

15

-

ns

15

-

ns

Hold Time, Row Address after RAS Low

10

-

ns

0

-

ns

0

-

ns

5. Referenced to the later of xCAS or WE in write operations.

AC Characteristics

Parameter

Sym

Min Max

Units

WE Low before CAS Low Hold Time (early-write operation only)

15

-

ns

OE Command Hold Time

15

-

ns

RAS Referenced to OE Hold Time

10

-

ns

RAS from CAS Precharge (Fast Page Mode)

40

-

ns

Column Address to WE Low Delay Time (read-write operation only)

60

-

ns

RAS Low to CAS High Delay Time (CBR refresh only)

15

-

ns

CAS High to RAS Low Delay Time (CAS to RAS Precharge Time)

5

-

ns

RAS Low to CAS High Delay Time (CAS Hold Time)

70

-

ns

CAS Low to RAS Low Delay Time (CAS Set-up Time)

5

-

ns

CAS Low to WE Low Delay Time (read-write operation only)

45

-

ns

OE to Data Delay Time

15

-

ns

15

35

ns

Column Address to RAS High Delay Time

35

-

ns

20

50

ns

RAS High to CAS Low Precharge Time

5

-

ns

CAS Low to RAS High Delay Time (RAS Hold Time)

20

-

ns

RAS Low to WE Low Delay Time (read-write operation only)

95

-

ns

WE Low after CAS Precharge Delay Time (read-write operation only)

65

-

ns

Refresh Time Interval

16

ms

3

50

ns

1. The maximum value is specified only to assure access time

2. Transition times (rise and fall) for RAS and xCAS are to be a minimum of 3ns and a maximum of 30ns.

AC Characteristics (continued)

Parameter

Sym

Min Max

Units