4C14400-40 View Datasheet(PDF) - Alliance Semiconductor

Part Name

Description

Manufacturer

4C14400-40

1M-bit × 4 CMOS DRAM (Fast page mode or EDO)

Alliance Semiconductor 

AS4C14400

AC parameters common to all waveforms

Symbol Parameter

tRC

Random read or write cycle time

tRP

RAS precharge time

tRAS

RAS pulse width

tCAS

CAS pulse width

tRCD RAS to CAS delay time

tRAD RAS to column address delay time

tRSH(R) CAS to RAS hold time (read)

tCSH RAS to CAS hold time

tCRP

CAS to RAS precharge time

tASR

Row address setup time

tRAH Row address hold time

tT

Transition time (rise and fall)

tREF

Refresh period

tCLZ

CAS to output in low Z

Shaded areas contain advance information.

Read cycle

Symbol Parameter

tRAC Access time from RAS

tCAC Access time from CAS

tAA

Access time from address

tAR(R) Column add hold from RAS

tRCS

Read command setup time

tRCH Read command hold time to CAS

tRRH Read command hold time to RAS

tRAL

Column address to RAS lead time

tCPN CAS precharge time

tODS Output disable setup time

tOFF

Output buffer turn-off time

Shaded areas contain advance information.

®

-40

Min Max

70 –

20 –

40 10K

10 –

18 30

13 20

10 –

40 –

0–

0–

8–

2 50

– 16

0–

-50

Min Max

90 –

30 –

50 10K

13 –

20 37

15 25

13 –

50 –

0–

0–

10 –

2 50

– 16

0–

-60

Min Max

110 –

40 –

60 10K

15 –

20 45

15 30

15 –

60 –

0–

0–

10 –

2 50

– 16

0–

-70

Min Max

130 –

50 –

70 10K

18 –

20 52

15 35

18 –

70 –

0–

0–

10 –

2 50

– 16

0–

Unit Notes

ns

ns

ns

ns

ns 6

ns 7

ns

ns

ns

ns

ns

ns 4,5

ms 3

ns 8

-40

Min Max

– 40

– 10

– 20

30 –

0–

0–

0–

20 –

5–

0–

0 10

-50

Min Max

– 50

– 13

– 25

40 –

0–

0–

0–

25 –

10 –

0–

0 13

-60

Min Max

– 60

– 15

– 30

45 –

0–

0–

0–

30 –

10 –

0–

0 15

-70

Min Max

– 70

– 18

– 35

55 –

0–

0–

0–

35 –

10 –

0–

0 18

Unit Notes

ns 6

ns 6,13

ns 7,13

ns

ns

ns 9

ns 9

ns

ns

ns

ns 8,10

4

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