25AA640/25LC640/25C640

DS21223A-page 2

Preliminary

© 1997 Microchip Technology Inc.

1.0

ELECTRICAL

CHARACTERISTICS

1.1

Maximum Ratings*

Vcc ...................................................................................7.0V

All inputs and outputs w.r.t. Vss.................. -0.6V to Vcc+1.0V

Storage temperature ....................................... -65˚C to 150˚C

Ambient temperature under bias..................... -65˚C to 125˚C

Soldering temperature of leads (10 seconds) ............. +300˚C

ESD protection on all pins................................................. 4kV

*Notice: Stresses above those listed under ‘Maximum ratings’ may

cause permanent damage to the device. This is a stress rating only and

functional operation of the device at those or any other conditions

above those indicated in the operational listings of this specification is

not implied. Exposure to maximum rating conditions for an extended

period of time may affect device reliability

TABLE 1-1:

PIN FUNCTION TABLE

FIGURE 1-1:

AC TEST CIRCUIT

1.2

AC Test Conditions

Name

Function

CS

Chip Select Input

SO

Serial Data Output

SI

Serial Data Input

SCK

Serial Clock Input

WP

Write Protect Pin

Ground

Supply Voltage

HOLD

Hold Input

AC Waveform:

(Note 1)

(Note 2)

Timing Measurement Reference Level

Input

Output

≤ 4.0V

SO

100 pF

1.8 K

2.25 K

TABLE 1-2:

DC CHARACTERISTICS

All parameters apply over the

specified operating ranges

unless otherwise noted.

Commercial (C):

Tamb = 0

°C to +70°C

Industrial (I):

Tamb = -40

°C to +85°C

Automotive (E):

Tamb = -40

°C to +125°C

Parameter

Symbol

Min

Max

Units

Test Conditions

High level input voltage

2.0

V

≥ 2.7V (Note)

V

Low level input voltage

-0.3

0.8

V

≥ 2.7V (Note)

-0.3

V

Low level output voltage

—

0.4

V

—

0.2

V

High level output voltage

—

V

µA

Input leakage current

-10

10

µA

Output leakage current

-10

10

µA

Internal Capacitance

(all inputs and outputs)

—

7

pF

Operating Current

—

—

1

500

mA

µA

—

—

5

3

mA

mA

Standby Current

—

—

5

1

µA

µA

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