HM5212325FBPC-B60 Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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HM5212325FBPC-B60

128M LVTTL interface SDRAM 100 MHz 1-Mword ×32-bit ×4-bank PC/100 SDRAM

Hitachi -> Renesas Electronics 

HM5212325FBPC-B60

AC Characteristics

(Tcase = 0 to +70°C [Tj max = 110°C]), VCC = 3.3 V ± 0.3 V, VSS = 0 V)

HM5212325F

-B60

Parameter

HITACHI PC/100

Symbol Symbol Min

System clock cycle time

(CAS latency = 2)

t CK

Tclk

15

(CAS latency = 3)

t CK

Tclk

10

CLK high pulse width

t CKH

Tch

3

CLK low pulse width

t CKL

Tcl

3

Access time from CLK

(CAS latency = 2)

t AC

Tac

—

(CAS latency = 3)

t AC

Tac

—

Data-out hold time

t OH

Toh

3

CLK to Data-out low impedance tLZ

2

CLK to Data-out high impedance tHZ

—

Input setup time

tAS, tCS, tDS, Tsi

2

t CES

CKE setup time for power down tCESP

exit

Tpde 2

Input hold time

tAH, tCH, tDH, Thi

1

t CEH

Ref/Active to Ref/Active command tRC

period

Trc

70

Active to Precharge command

t RAS

period

Tras

50

Active command to column

t RCD

Trcd

20

command (same bank)

Precharge to active command

t RP

period

Trp

20

Write recovery or data-in to

t DPL

precharge lead time

Tdpl

10

Active (a) to Active (b) command tRRD

period

Trrd

20

Transition time (rise and fall)

tT

1

Refresh period

t REF

—

Max

—

—

—

—

8

6

—

—

6

—

—

—

—

120000

—

—

—

—

5

64

Unit Notes

1

ns

ns

ns 1

ns 1

1, 2

ns

ns

ns 1, 2

ns 1, 2, 3

ns 1, 4

ns 1, 5, 6

ns 1

ns 1, 5

ns 1

ns 1

ns 1

ns 1

ns 1

ns 1

ns

ms

9

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