25LC320

DS21158B-page 4

Preliminary

© 1996 Microchip Technology Inc.

TABLE 1-3:

AC CHARACTERISTICS

Applicable over recommended operating ranges shown below unless otherwise noted:

Commercial (C):

Tamb = 0

°C to +70°C

Industrial (I):

Tamb = -40

°C to +85°C

Symbol

Parameter

Min

Max

Units

Test Conditions

Clock Frequency

—

—

3

2

MHz

MHz

CS Setup Time

100

250

—

—

ns

ns

CS Hold Time

100

250

—

—

ns

ns

CS Disable Time

250

500

—

—

ns

ns

Data Setup Time

30

50

—

—

ns

ns

Data Hold Time

50

100

—

—

ns

ns

CLK Rise Time

—

2

µs

(Note 1)

CLK Fall Time

—

2

µs

(Note 1)

Clock High Time

150

250

—

—

ns

ns

Clock Low Time

150

250

—

—

ns

ns

Clock Delay Time

50

—

ns

Output Valid from

Clock Low

—

—

150

250

ns

ns

Output Hold Time

0

—

ns

Output Disable Time

—

—

200

250

ns

ns

HOLD Setup Time

100

100

—

—

ns

ns

HOLD Hold Time

100

100

—

—

ns

ns

HOLD Low to Output High-Z

100

150

—

—

ns

ns

HOLD High to Output Valid

100

150

—

—

ns

ns

Internal Write Cycle Time

—

5

ms

(Note 2)

—

Endurance

1M

—

E/W Cycles 25

°C, Vcc = 5.0V, Block Mode

(Note 3)

Note 1: This parameter is periodically sampled and not 100% tested.

cycle is complete.

3: This parameter is not tested but guaranteed by characterization. For endurance estimates in a specific appli-

cation, please consult the Total Endurance Model which can be obtained on our BBS or website.