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25AA040/25LC040/25C040
1997 Microchip Technology Inc.
Preliminary
DS21204A-page 3
TABLE 1-3:
AC CHARACTERISTICS
All parameters apply over the
specied operating ranges
unless otherwise noted.
Commercial (C):
Tamb = 0
°C to +70°C
VCC = 1.8V to 5.5V
Industrial (I):
Tamb = -40
°C to +85°C
VCC = 1.8V to 5.5V
Automotive (E):
Tamb = -40
°C to +125°C
VCC = 4.5V to 5.5V (25C040 only)
Parameter
Symbol
Min
Max
Units
Test Conditions
Clock Frequency
FCLK
—
3
2
1
MHz
VCC = 4.5V to 5.5V
VCC = 2.5V to 4.5V
VCC = 1.8V to 2.5V
CS Setup Time
TCSS
100
250
500
—
ns
VCC = 4.5V to 5.5V
VCC = 2.5V to 4.5V
VCC = 1.8V to 2.5V
CS Hold Time
TCSH
150
250
475
—
ns
VCC = 4.5V to 5.5V
VCC = 2.5V to 4.5V
VCC = 1.8V to 2.5V
CS Disable Time
TCSD
500
—
ns
Data Setup Time
TSU
30
50
—
ns
VCC = 4.5V to 5.5V
VCC = 2.5V to 4.5V
VCC = 1.8V to 2.5V
Data Hold Time
THD
50
100
—
ns
VCC = 4.5V to 5.5V
VCC = 2.5V to 4.5V
VCC = 1.8V to 2.5V
CLK Rise Time
TR
—
2
s
(Note 1)
CLK Fall Time
TF
—
2
s
(Note 1)
Clock High Time
THI
150
250
475
—
ns
VCC = 4.5V to 5.5V
VCC = 2.5V to 4.5V
VCC = 1.8V to 2.5V
Clock Low Time
TLO
150
250
475
—
ns
VCC = 4.5V to 5.5V
VCC = 2.5V to 4.5V
VCC = 1.8V to 2.5V
Clock Delay Time
TCLD
50
—
ns
Clock Enable Time
TCLE
50
—
ns
Output Valid from
Clock Low
TV
—
150
250
475
ns
VCC = 4.5V to 5.5V
VCC = 2.5V to 4.5V
VCC = 1.8V to 2.5V
Output Hold Time
THO
0
—
ns
(Note 1)
Output Disable Time
TDIS
—
200
250
500
ns
VCC = 4.5V to 5.5V (Note 1)
VCC = 2.5V to 4.5V (Note 1)
VCC = 1.8V to 2.5V (Note 1)
HOLD Setup Time
THS
100
200
—
ns
VCC = 4.5V to 5.5V
VCC = 2.5V to 4.5V
VCC = 1.8V to 2.5V
HOLD Hold Time
THH
100
200
—
ns
VCC = 4.5V to 5.5V
VCC = 2.5V to 4.5V
VCC = 1.8V to 2.5V
HOLD Low to Output High-Z
THZ
100
150
200
—
ns
VCC = 4.5V to 5.5V (Note 1)
VCC = 2.5V to 4.5V (Note 1)
VCC = 1.8V to 2.5V (Note 1)
HOLD High to Output Valid
THV
100
150
200
—
ns
VCC = 4.5V to 5.5V
VCC = 2.5V to 4.5V
VCC = 1.8V to 2.5V
Internal Write Cycle Time
TWC
—
5
ms
Endurance
—
10M
—
E/W Cycles
(Note 2)
Note 1:
This parameter is periodically sampled and not 100% tested.
2:
This parameter is not tested but guaranteed by characterization. For endurance estimates in a specic application, please
consult the Total Endurance Model which can be obtained on Microchip’s BBS or website.