CDP1822 Просмотр технического описания (PDF) - Intersil

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CDP1822

256-Word x 4-Bit LSI Static RAM

Intersil 

CDP1822, CDP1822C

Data Retention Specifications At TA = -40 to +85oC, see Figure 3.

LIMITS

TEST CONDITIONS

CDP1822

CDP1822C

PARAMETER

VDR

VDD

(NOTE 1)

(NOTE 1)

(V)

(V)

MIN

TYP MAX MIN

TYP

MAX

Min. Data Retention Voltage

VDR

-

Data Retention Quiescent

2

Current

IDD

Chip Deselect to Data Retention

-

Time

tCDR

-

-

-

1.5

2

-

1.5

2

-

-

30

100

-

30

100

5

600

-

-

600

-

-

10

300

-

-

-

-

-

Recovery to Normal Operation

-

5

600

-

-

600

-

-

Time

tRC

-

10

300

-

-

-

-

-

VDD to VDR Rise and Fall Time tR, tF

2

5

1

-

-

1

-

-

NOTE: Typical values are for TA = 25oC and nominal VDD.

UNITS

V

µA

ns

ns

ns

ns

µA

VDD

tCDR

CS2

VIH

VIL

DATA RETENTION

MODE

0.95 VDD

tf

VDR

0.95 VDD

tr

tRC

VIH

VIL

FIGURE 3. LOW VDD DATA RETENTION TIME WAVEFORMS

VDD

WRITE

ADDRESS

DECODER

VSS

READ

ADDRESS

DECODER

VDD

FIGURE 4. MEMORY CELL CONFIGURATION

6-16

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