Datasheet

25AA320A/25LC320A
DS21828F-page 4 © 2009 Microchip Technology Inc.
TABLE 1-3: AC TEST CONDITIONS
17 THH HOLD hold time 20
40
80
—
—
—
ns
ns
ns
4.5V ≤ Vcc ≤ 5.5V
2.5V ≤ Vcc < 4.5V
1.8V ≤ Vcc < 2.5V
18 T
HZ HOLD low to output
High-Z
30
60
160
—
—
—
ns
ns
ns
4.5V ≤ Vcc ≤ 5.5V(Note 1)
2.5V ≤ Vcc < 4.5V(Note 1)
1.8V ≤ Vcc < 2.5V(Note 1)
19 T
HV HOLD high to output valid 30
60
160
—
—
—
ns
ns
ns
4.5V ≤ Vcc ≤ 5.5V
2.5V ≤ Vcc < 4.5V
1.8V ≤ Vcc < 2.5V
20 T
WC Internal write cycle time — 5 ms (NOTE 2)
21 — Endurance 1,000,000 — E/W
Cycles
Page Mode, 25°C, V
CC = 5.5V (NOTE 3)
TABLE 1-2: AC CHARACTERISTICS (CONTINUED)
AC CHARACTERISTICS
Industrial (I): T
A = -40°C to +85°C VCC = 1.8V to 5.5V
Automotive (E): T
A = -40°C to +125°C VCC = 2.5V to 5.5V
Param.
No.
Sym. Characteristic Min. Max. Units Test Conditions
Note 1: This parameter is periodically sampled and not 100% tested.
2: T
WC begins on the rising edge of CS after a valid write sequence and ends when the internal write cycle is
complete.
3: This parameter is not tested but ensured by characterization. For endurance estimates in a specific
application, please consult the Total Endurance™ Model which can be obtained from Microchip’s web site
at www.microchip.com.
AC Waveform:
VLO = 0.2V —
VHI = VCC - 0.2V (Note 1)
V
HI = 4.0V (Note 2)
CL = 50 pF —
Timing Measurement Reference Level
Input 0.5 V
CC
Output 0.5 VCC
Note 1: For VCC ≤ 4.0V
2: For V
CC > 4.0V