cdp1855 datasheet(13/15 Pages) INTERSIL

Part #	CDP1855

Description	8-Bit Programmable Multiply/Divide Unit

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Manufacturer	INTERSIL [Intersil Corporation]

Direct Link	http://www.intersil.com/cda/home

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13 / 15 page

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Dynamic Electrical Speciﬁcations At TA = -40 to +85oC, VDD ±5%, tR, tF = 20ns, VIH = 0.7VDD, VIL = 0.3VDD,

CL = 100pF (See Figure 8)

(NOTE 1)

PARAMETER

VDD

(V)

LIMITS

UNITS

CDP1855

CDP1855C

MIN

(NOTE 2)

TYP

MAX

MIN

(NOTE 2)

TYP

MAX

WRITE CYCLE

Minimum Clear Pulse Width

tCLR

5

-

50

75

-

50

75

ns

10

-

25

40

-

ns

Minimum Write Pulse Width

tWW

5

-

150

225

-

150

225

ns

10

-

75

115

-

ns

Minimum Data-In-Setup

tDSU

5

-

-75

0

-

-75

0

ns

10

-

-40

0

-

ns

Minimum Data-In-Hold

tDH

5

-

50

75

-

50

75

ns

10

-

25

40

-

ns

Minimum Address to Write

Setup

tASU

5

-

50

75

-

50

75

ns

10

-

25

40

-

ns

Minimum Address after

Write Hold

tAH

5

-

50

75

-

50

75

ns

10

-

25

40

-

ns

NOTES:

1. Maximum limits of minimum characteristics are the values above which all devices function.

2. Typical values are for TA = 25

oC and nominal voltages.

Dynamic Electrical Speciﬁcations At TA = -40 to +85oC, VDD ±5%, tR, tF = 20ns, VIH = 0.7VDD, VIL = 0.3VDD,

CL = 100pF (See Figure 9)

(NOTE 1)

PARAMETER

VDD

(V)

LIMITS

UNITS

CDP1855

CDP1855C

MIN

(NOTE 2)

TYP

MAX

MIN

(NOTE 2)

TYP

MAX

READ CYCLE

CE to Data Out Active

tCDO

5

-

200

300

-

200

300

ns

10

-

100

150

-

ns

CE to Data Access

tCA

5

-

300

450

-

300

450

ns

10

-

150

225

-

ns

Address to Data Access

tAA

5

-

300

450

-

300

450

ns

10

-

150

225

-

ns

Data Out Hold after CE

tDOH

5

50

150

225

50

150

225

ns

10

25

75

115

-

ns

Data Out Hold after Read

tDOH

5

50

150

225

50

150

225

ns

10

25

75

115

-

ns

Read to Data Out Active

tRDO

5

-

200

300

-

200

300

ns

10

-

100

150

-

ns

Read to Data Access

tRA

5

-

200

300

-

200

300

ns

10

-

100

150

-

ns

CDP1855, CDP1855C

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