27LV256

DS11020F-page 2

© 1996 Microchip Technology Inc.

1.0

ELECTRICAL

CHARACTERISTICS

1.1

Maximum Ratings*

programming ......................................... -0.6V to +14V

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

Ambient temp. with power applied ..... -65˚C to +125˚C

*Notice: Stresses above those listed under “Maximum Ratings”

may cause permanent damage to the device. This is a stress rat-

ing only and functional operation of the device at those or any

other conditions above those indicated in the operation listings of

this specification is not implied. Exposure to maximum rating con-

ditions for extended periods may affect device reliability.

TABLE 1-1:

PIN FUNCTION TABLE

Name

Function

A0-A14

Address Inputs

CE

Chip Enable

OE

Output Enable

Programming Voltage

O0 - O7

Data Output

+5V or +3V Power Supply

Ground

NC

No Connection; No Internal

Connection

NU

Not Used; No External Connection Is

Allowed

TABLE 1-2:

READ OPERATION DC CHARACTERISTICS

±10% or 3.0V where indicated

Commercial:

Tamb =

0˚C to +70˚C

Industrial:

Tamb = -40˚C to +85˚C

Parameter

Part*

Status

Symbol

Min.

Max.

Units

Conditions

Input Voltages

all

Logic "1"

Logic "0"

2.0

-0.5

0.8

V

V

Input Leakage

all

-10

10

Output Voltages

all

Logic "1"

Logic "0"

2.4

0.45

V

V

µA

Output Leakage

all

—

-10

10

Input Capacitance

all

—

—

6

pF

°C;

f = 1 MHz

Output Capacitance

all

—

—12

pF

°C;

f = 1 MHz

Power Supply Current,

Active

C

I

TTL input

TTL input

—

—

20 @ 5.0V

8 @ 3.0V

25 @ 5.0V

10 @ 3.0V

mA

mA

mA

mA

f = 1 MHz;

Note 1

Power Supply Current,

Standby

C

I

all

TTL input

TTL input

CMOS input

—

1 @ 3.0V

2 @ 3.0V

100 @ 3.0V

mA

mA

* Parts: C=Commercial Temperature Range

I =Industrial Temperature Ranges

Note 1: Typical active current increases .75 mA per MHz up to operating frequency for all temperature ranges.