25LC640X-EP 查看數據表（PDF） - Microchip Technology
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25LC640X-EP Datasheet PDF : 12 Pages
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25AA640/25LC640/25C640
TABLE 1-3: AC CHARACTERISTICS
All parameters apply over the
specified operating ranges
unless otherwise noted.
Commercial (C):
Industrial (I):
Automotive (E):
Tamb = 0°C to +70°C
Tamb = -40°C to +85°C
Tamb = -40°C to +125°C
VCC = 1.8V to 5.5V
VCC = 1.8V to 5.5V
VCC = 4.5V to 5.5V (25C640 only)
Parameter
Symbol
Min
Max
Units
Test Conditions
Clock Frequency
FCLK
—
3
MHz
VCC = 4.5V to 5.5V
—
2
MHz
VCC = 2.5V to 4.5V
—
1
MHz
VCC = 1.8V to 2.5V
CS Setup Time
TCSS
100
—
250
—
500
—
ns
VCC = 4.5V to 5.5V
ns
VCC = 2.5V to 4.5V
ns
VCC = 1.8V to 2.5V
CS Hold Time
TCSH
150
—
250
—
475
—
ns
VCC = 4.5V to 5.5V
ns
VCC = 2.5V to 4.5V
ns
VCC = 1.8V to 2.5V
CS Disable Time
TCSD
500
—
ns
Data Setup Time
TSU
30
—
ns
VCC = 4.5V to 5.5V
50
—
ns
VCC = 2.5V to 4.5V
50
—
ns
VCC = 1.8V to 2.5V
Data Hold Time
THD
50
—
ns
VCC = 4.5V to 5.5V
100
—
ns
VCC = 2.5V to 4.5V
100
—
ns
VCC = 1.8V to 2.5V
CLK Rise Time
TR
—
2
µs
(Note 1)
CLK Fall Time
TF
—
2
µs
(Note 1)
Clock High Time
THI
150
—
ns
VCC = 4.5V to 5.5V
250
—
ns
VCC = 2.5V to 4.5V
475
—
ns
VCC = 1.8V to 2.5V
Clock Low Time
TLO
150
—
ns
VCC = 4.5V to 5.5V
250
—
ns
VCC = 2.5V to 4.5V
475
—
ns
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
ns
VCC = 4.5V to 5.5V
—
250
ns
VCC = 2.5V to 4.5V
—
475
ns
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)
ns
VCC = 2.5V to 4.5V (Note 1)
ns
VCC = 1.8V to 2.5V (Note 1)
HOLD Setup Time
THS
100
—
ns
VCC = 4.5V to 5.5V
100
—
ns
VCC = 2.5V to 4.5V
200
—
ns
VCC = 1.8V to 2.5V
HOLD Hold Time
THH
100
—
ns
VCC = 4.5V to 5.5V
100
—
ns
VCC = 2.5V to 4.5V
200
—
ns
VCC = 1.8V to 2.5V
HOLD Low to Output High-Z
THZ
100
—
ns
VCC = 4.5V to 5.5V (Note 1)
150
—
ns
VCC = 2.5V to 4.5V (Note 1)
200
—
ns
VCC = 1.8V to 2.5V (Note 1)
HOLD High to Output Valid
THV
100
—
ns
VCC = 4.5V to 5.5V
150
—
ns
VCC = 2.5V to 4.5V
200
—
ns
VCC = 1.8V to 2.5V
Internal Write Cycle Time
TWC
—
5
ms
Endurance
—
1M
—
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 specific application, please
consult the Total Endurance Model which can be obtained on Microchip’s BBS or website.
© 1997 Microchip Technology Inc.
Preliminary
DS21223A-page 3
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