MB81P643287 Datasheet, PDF (34/65 Pages) Fujitsu Component Limited. – 8 x 256K x 32 BIT, FCRAMTM CORE BASED DOUBLE DATA RATE SDRAM

MB81P643287-50/-60
EXAMPLE OF FREQUENCY DEPENDANT AC PARAMETERS (@ Minimum tCK)
Parameter
tCK = 5ns tCK = 6ns tCK = 7.5ns tCK = 9ns tCK = 10.5ns
Symbol
Unit
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.
Clock High Time
tCH 2.3 — 2.7 — 3.4 — 4.1 — 4.8 — ns
Clock Low Time
tCL 2.3 — 2.7 — 3.4 — 4.1 — 4.8 — ns
DQS Low to High Input
Transition Setup Time from CLK
tDQSS
3.8 6.3 4.5 7.5 5.7 9.4 6.8 11.3 7.9 13.2 ns
DQS Low Input Pulse Width
tDSL 2.0 — 2.4 — 3.0 — 3.6 — 4.2 — ns
DQS High Input Pulse Width
tDSH 2.0 — 2.4 — 3.0 — 3.6 — 4.2 — ns
DQS First Low Input Hold Time
(Input Preamble Hold Time)
tDSPREH 1.3
—
1.5
—
1.9
—
2.3
—
2.7
—
ns
DQS First Low Input Pulse Width
(Input Preamble Pulse Width)
tDSPRE
2.0
—
2.4
—
3.0
—
3.6
—
4.2
—
ns
DQS Last Low Input Hold Time
(Postamble Hold Time)
tDSPST
2.0 — 2.4 — 3.0 — 3.6 — 4.2 — ns
DQS Access Time from Clock
tQSCK -0.7 0.7 -0.8 0.8 -1.0 1.0 -1.1 1.1 -1.3 1.3 ns
DQS Output Valid Time
tQSV 1.5 — 1.8 — 2.3 — 2.7 — 3.2 — ns
DQS Output in Low-Z
(Output Preamble)
tQSLZ -0.7 — -0.8 — -1.0 — -1.1 — -1.3 — ns
DQS First Low Output Hold Time
(Output Preamble)
tQSPRE
4.3 5.7 5.2 6.8 6.6 8.5 7.9 10.1 9.3 11.8 ns
DQS Last Low Output Hold Time
(Output Postamble)
tQSPST
1.8 3.2 2.2 3.8 2.8 4.7 3.4 5.6 4.0 6.5 ns
DQS Last Low Output in High-Z
from CLK or CLK
tQSHZ
— 0.7 — 0.8 — 1.0 — 1.1 — 1.3 ns
DQ Output Access Time
from CLK & CLK
tACC -0.7 0.7 -0.8 0.8 -1.0 1.0 -1.1 1.1 -1.3 1.3 ns
DQ Output Access Time
from DQS
tQSQ -0.5 0.5 -0.6 0.6 -0.8 0.8 -0.9 0.9 -1.1 1.1 ns
DQ Output Data Valid Time
from DQS
tDV 1.5 — 1.8 — 2.3 — 2.7 — 3.2 — ns
DQ Output in Low-Z
tLZ -0.7 — -0.8 — -1.0 — -1.1 — -1.3 — ns
DQ Output in High-Z
tHZ -0.7 0.7 -0.8 0.8 -1.0 1.0 -1.1 1.1 -1.3 1.3 ns
DQ & DM Input Pulse Width
tDIPW 2.0 — 2.4 — 3.0 — 3.6 — 4.2 — ns
DQS Falling Edge to Clock Hold
Time
tDSCH
1.5 — 1.5 — 1.5 — 1.8 — 2.1
— ns
DQS Falling Edge to Clock
Setup Time
tDSCS 1.5 — 1.5 — 1.5 — 1.8 — 2.1 — ns
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