TM4100GAD8

4194304 BY 8-BIT DRAM MODULE

SMMS508C – MARCH 1992 – REVISED JUNE 1995

5

POST OFFICE BOX 1443

timing requirements over recommended ranges of supply voltage and operating free-air

temperature (continued)

’4100GAD8-60

’4100GAD8-70

’4100GAD8-80

UINT

MIN

MAX

MIN

MAX

MIN

MAX

UINT

tRAH

Hold time, row address after RAS low

10

10

10

ns

tRCH

Hold time, W high after CAS high (see Note 11)

0

0

0

ns

tRRH

Hold time, W high after RAS high (see Note 11)

0

0

0

ns

tWCH

Hold time, write after CAS low

15

15

15

ns

tWCR

Hold time, W low after RAS low (see Note 9)

50

55

60

ns

tWRH

Hold time, W high after RAS low (CBR refresh only)

10

10

10

ns

tWTH

Hold time, W low (test mode only)

10

10

10

ns

tRASP

Pulse duration, page mode, RAS low

60

100 000

70

100 000

80

100 000

ns

tRAS

Pulse duration, nonpage mode, RAS low

60

10 000

70

10 000

80

10 000

ns

tCAS

Pulse duration, CAS low

15

10 000

18

10 000

20

10 000

ns

tCP

Pulse duration, CAS high

10

10

10

ns

tRP

Pulse duration, RAS high (precharge)

40

50

60

ns

tWP

Pulse duration, write

15

15

15

ns

tASC

Setup time, column address before CAS low

0

0

0

ns

tASR

Setup time, row address before RAS low

0

0

0

ns

tDS

Setup time, data before CAS low

0

0

0

ns

tRCS

Setup time, W high before CAS low

0

0

0

ns

tCWL

Setup time, W low before CAS high

15

18

20

ns

tRWL

Setup time, W low before RAS high

15

18

20

ns

tWCS

Setup time, W low before CAS low

0

0

0

ns

tWRP

Setup time, W high before RAS low (CBR refresh only)

10

10

10

ns

tWTS

Setup time, W low (test mode only)

10

10

10

ns

tTAA

Access time from address (test mode)

35

40

45

ns

tTCPA

Access time from column precharge (test mode)

40

45

50

ns

tTRAC

Access time from RAS (test mode)

65

75

85

ns

tREF

Refresh time interval

16

16

16

ms

tT

Transition time

2

50

2

50

2

50

ns

NOTES:

9. The minimum value is measured when tRCD is set to tRCD min as a reference.

11. Either tRRH or tRCH must be satisfied for a read cycle.

device symbolization

TM4100GAD8

– SS

YYMMT

YY = Year Code

MM = Month Code

T = Assembly Site Code

–SS = Speed

NOTE A: The location of symbolization may vary.