25C640 Microchip Technology, Inc., 25C640 Datasheet - Page 6

• Manufacturer Part Number: 25C640
• Description: The 25AA640 is a 64K-bit Serial Electrically Erasable Prom With Memory Accessed Via a Simple Serial Peripheral Interface (SPI™) Compatible Serial Bus
• Manufacturer: Microchip Technology, Inc.

25AA640/25LC640
1.3
DS21223E-page 6
AC Waveform:
Timing Measurement Reference Level
Note 1: For V
V
V
V
Input
Output
LO
HI
HI
AC Test Conditions
= V
= 4.0V
2: For V
= 0.2V
CC
- 0.2V
CC
CC
> 4.0V
4.0V
(Note 1)
(Note 2)
0.5 V
0.5 V
CC
CC
FIGURE 1-4:
SO
V
CC
AC TEST CIRCUIT
1.8 k
2.25 k
2001 Microchip Technology Inc.
100 pF