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DS21Q55

34.2 Nonmultiplexed Bus AC Characteristics

AC CHARACTERISTICS–NONMULTIPLEXED PARALLEL PORT (MUX = 0) (0°C to +70°C; VDD = 3.3V ± 5% for DS21Q55;

-40°C to +85°C; VDD = 3.3V ± 5% for DS21Q55N)

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

NOTES

Setup Time for A0 to A7, Valid to

t1

0

 

 

ns

 

CS* Active

 

 

 

 

 

 

Setup Time for CS* Active to

t2

0

 

 

ns

 

Either RD*, WR*, or DS* Active

 

 

 

 

 

 

Delay Time From Either RD* or

t3

 

 

75

ns

 

DS* Active to Data Valid

 

 

 

 

 

 

Hold Time From Either RD*,

t4

0

 

 

ns

 

WR*, or DS* Inactive to CS*

 

 

 

 

 

 

Inactive

 

 

 

 

 

 

Hold Time From CS* Inactive to

t5

5

 

20

ns

 

Data Bus 3-state

 

 

 

 

 

 

Wait Time from Either WR* or

t6

75

 

 

ns

 

DS* Activate to Latch Data

 

 

 

 

 

 

Data Setup Time to Either WR*

t7

10

 

 

ns

 

or DS* Inactive

 

 

 

 

 

 

Data Hold Time from Either WR*

t8

10

 

 

ns

 

or DS* Inactive

 

 

 

 

 

 

Address Hold from Either WR*

t9

10

 

 

ns

 

or DS* Inactive

 

 

 

 

 

 

See Figures 37-4 to 37-7

 

 

 

 

 

 

236 of 248

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Please contact telecom.support@dalsemi.com or search http://www.maxim-ic.com for updated

information.

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Maxim DS21Q55 specifications 236 012103