6-27

+

PARAMETER

SYMBOL

(V)

LIMITS

CDP1823

CDP1823C

UNITS

(NOTE 2)

MIN

(NOTE 1)

TYP

MAX

(NOTE 2)

MIN

(NOTE 1)

TYP

MAX

Read Cycle (See Figure 1)

Access Time From Address

Change

5

-

275

450

-

275

450

ns

10

-

150

250

-

-

-

ns

Access Time From Chip

Select

5

-

150

250

-

150

250

ns

10

-

100

150

-

-

-

ns

MRD to Output Active

5

-

150

250

-

150

250

ns

10

-

100

150

-

-

-

ns

Data Hold Time After Read

5

255075255075

ns

10

15

25

40

-

-

-

ns

NOTES:

2. Time required by a limit device to allow for the indicated function.

ADDRESS

MRD

CS2, CS3, CS5

CS1, CS4

DATA OUT

HIGH IMPEDANCE

VALID DATA

90%

10%

NOTE:

FIGURE 1. READ CYCLE TIMING DIAGRAM

CDP1823, CDP1823C