AS7C256 Просмотр технического описания (PDF) - Alliance Semiconductor

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AS7C256

High Performance 32K×8 CMOS SRAM

Alliance Semiconductor 

AS7C256

AS7C256L

TYPICAL DC AND AC CHARACTERISTICS

Normalized supply current ICC, ISB

vs. supply voltage VCC

1.4

1.2

1.0

ICC

0.8

0.6

0.4

ISB

0.2

0.0

4.0

4.5 5.0 5.5 6.0

Supply voltage (V)

Normalized access time tAA

vs. supply voltage VCC

1.5

1.4

Ta = 25°C

1.3

1.2

1.1

1.0

0.9

0.8

4.0

4.5 5.0 5.5 6.0

Supply voltage (V)

Output source current IOH

vs. output voltage VOH

140

120

VCC = 5.0V

100 Ta = 25°C

80

60

40

20

0

0.0 1.25 2.5 3.75 5.0

Output voltage (V)

Normalized supply current ICC, ISB

vs. ambient temperature Ta

1.4

Normalized supply current ISB1

vs. ambient temperature Ta

1.2

ICC

1.0

0.8

0.6

0.4

0.2

ISB

0.0

–55 –10 35 80 125

Ambient temperature (°C)

625

VCC = 5.0V

25

5

1

0.2

0.04

-55 -10 35 80

125

Ambient temperature (°C)

Normalized access time tAA

vs. ambient temperature Ta

1.5

Normalized supply current ICC

vs. cycle frequency 1/tRC, 1/tWC

1.4

1.4

VCC = 5.0V

1.3

1.2

1.2

VCC = 5.0V

1.0 Ta = 25°C

0.8

1.1

0.6

1.0

0.4

0.9

0.2

0.8

–55 –10 35 80 125

Ambient temperature (°C)

0.0

0

25 50 75 100

Cycle frequency (MHz)

Output sink current IOL

vs. output voltage VOL

140

Typical access time change ∆tAA

vs. output capacitive loading

35

120

VCC = 5.0V

100 Ta = 25°C

80

30

VCC = 4.5V

25

20

60

15

40

10

20

5

0

0.0 1.25

2.5 3.75 5.0

Output voltage (V)

0

0 250 500 750 1000

Capacitance (pF)

AS7C256-11

7

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