25lc640a Microchip Technology Inc., 25lc640a Datasheet - Page 4

• Manufacturer Part Number: 25lc640a
• Description: 64k Spi Bus Serial Eeprom
• Manufacturer: Microchip Technology Inc.

25AA640A/25LC640A
TABLE 1-2:
TABLE 1-3:
DS21830C-page 4
AC CHARACTERISTICS
17
18
19
20
21
AC Waveform:
Timing Measurement Reference Level
Param.
No.
Note 1: This parameter is periodically sampled and not 100% tested.
Note 1: For V
V
V
V
C
Input
Output
LO
HI
HI
L
= 100 pF
2: This parameter is not tested but ensured by characterization. For endurance estimates in a specific
3: T
= V
= 4.0V
2: For V
= 0.2V
T
T
T
T
—
Sym.
HH
HZ
HV
WC
application, please consult the Total Endurance™ Model which can be obtained from our web site:
www.microchip.com.
is complete.
CC
WC
- 0.2V
begins on the rising edge of CS after a valid write sequence and ends when the internal write cycle
HOLD Hold Time
HOLD Low to Output
High-Z
HOLD High to Output
Valid
Internal Write Cycle Time
Endurance
AC CHARACTERISTICS (CONTINUED)
AC TEST CONDITIONS
CC
CC
≤ 4.0V
> 4.0V
Characteristic
(Note 1)
(Note 2)
0.5 V
0.5 V
—
—
Industrial (I):
Automotive (E): T
CC
CC
Min.
160
160
1M
20
40
80
30
60
30
60
—
Max.
—
—
—
—
—
—
—
—
—
—
5
T
A
A
= -40°C to +85°C
= -40°C to +125°C
Cycles
Units
E/W
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
4.5V ≤ Vcc ≤ 5.5V
2.5V ≤ Vcc < 4.5V
1.8V ≤ Vcc < 2.5V
4.5V ≤ Vcc ≤ 5.5V(Note 1)
2.5V ≤ Vcc < 4.5V(Note 1)
1.8V ≤ Vcc < 2.5V(Note 1)
4.5V ≤ Vcc ≤ 5.5V
2.5V ≤ Vcc < 4.5V
1.8V ≤ Vcc < 2.5V
(N
(N
OTE
OTE
3)
2)
© 2007 Microchip Technology Inc.
V
V
Test Conditions
CC
CC
= 1.8V to 5.5V
= 2.5V to 5.5V