25AA640A データシートの表示（PDF） - Microchip Technology

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25AA640A

64K SPI Bus Serial EEPROM

Microchip Technology 

25AA640A/25LC640A

TABLE 1-2: AC CHARACTERISTICS (CONTINUED)

AC CHARACTERISTICS

Industrial (I): TA = -40°C to +85°C

Automotive (E): TA = -40°C to +125°C

VCC = 1.8V to 5.5V

VCC = 1.8V to 5.5V

Param.

No.

Sym.

Characteristic

Min.

Max. Units

Test Conditions

17

THH HOLD hold time

20

—

ns 4.5V Vcc  5.5V

40

—

ns 2.5V Vcc  4.5V

80

—

ns 1.8V Vcc  2.5V

18

THZ HOLD low to output

High-Z

30

—

ns 4.5V Vcc  5.5V (Note 1)

60

—

ns 2.5V Vcc  4.5V (Note 1)

160

—

ns 1.8V Vcc  2.5V (Note 1)

19

THV HOLD high to output valid

30

60

160

—

ns 4.5V Vcc  5.5V

—

ns 2.5V Vcc  4.5V

—

ns 1.8V Vcc  2.5V

20

TWC Internal write cycle time

—

5

ms (Note 3)

21

— Endurance

1M

—

E/W 25°C, VCC = 5.5V (Note 2)

Cycles

Note 1: This parameter is periodically sampled and not 100% tested.

2: 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.

3: TWC begins on the rising edge of CS after a valid write sequence and ends when the internal write cycle

is complete.

TABLE 1-3: AC TEST CONDITIONS

AC Waveform:

VLO = 0.2V

—

VHI = VCC - 0.2V

(Note 1)

VHI = 4.0V

(Note 2)

CL = 100 pF

—

Timing Measurement Reference Level

Input

0.5 VCC

Output

0.5 VCC

Note 1: For VCC  4.0V.

2: For VCC > 4.0V.

DS21830F-page 4

 2003-2013 Microchip Technology Inc.

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