7C256-12 datasheet(7/8 Pages) ALSC

Part #	7C256-12

Description	High Performance 32Kx8 CMOS SRAM

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Manufacturer	ALSC [Alliance Semiconductor Corporation]

Direct Link	https://www.alliancememory.com

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AS7C256

AS7C256L

7

TYPICAL DC AND AC CHARACTERISTICS

Supply voltage (V)

4.0

5.5

6.0

5.0

4.5

0.0

0.2

0.6

0.8

0.4

1.0

1.2

1.4

Normalized supply current ICC, ISB

Ambient temperature (°C)

–55

80

125

35

–10

0.0

0.2

0.6

0.8

0.4

1.0

1.2

1.4

Normalized supply current ICC, ISB

vs. ambient temperature Ta

vs. supply voltage VCC

ICC

ISB

ICC

ISB

Ambient temperature (°C)

-55

80

125

35

-10

0.2

1

0.04

5

25

625

Normalized supply current ISB1

vs. ambient temperature Ta

VCC = 5.0V

Supply voltage (V)

4.0

5.5

6.0

5.0

4.5

0.8

0.9

1.1

1.2

1.0

1.3

1.4

1.5

Normalized access time tAA

Ambient temperature (°C)

–55

80

125

35

–10

0.8

0.9

1.1

1.2

1.0

1.3

1.4

1.5

Normalized access time tAA

Cycle frequency (MHz)

075

100

50

25

0.0

0.2

0.6

0.8

0.4

1.0

1.2

1.4

Normalized supply current ICC

vs. ambient temperature Ta

vs. cycle frequency 1/tRC, 1/tWC

vs. supply voltage VCC

VCC = 5.0V

Ta = 25°C

VCC = 5.0V

Ta = 25°C

Output voltage (V)

0.0

3.75

5.0

2.5

1.25

0

20

60

80

40

100

120

140

Output source current IOH

Output voltage (V)

0.0

3.75

5.0

2.5

1.25

Output sink current IOL

vs. output voltage VOL

vs. output voltage VOH

0

20

60

80

40

100

120

140

VCC = 5.0V

Ta = 25°C

VCC = 5.0V

Ta = 25°C

Capacitance (pF)

0

750

1000

500

250

0

5

15

20

10

25

30

35

Typical access time change

∆t

AA

vs. output capacitive loading

VCC = 4.5V

AS7C256-11

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