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27C256-30I

256K (32K x 8) Low-Voltage CMOS EPROM

Microchip Technology 

27LV256

1.0 ELECTRICAL

CHARACTERISTICS

1.1 Maximum Ratings*

VCC and input voltages w.r.t. VSS ........ -0.6V to +7.25V

VPP voltage w.r.t. VSS during

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

Voltage on A9 w.r.t. VSS ...................... -0.6V to +13.5V

Output voltage w.r.t. VSS ................-0.6V to VCC +1.0V

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

A0-A14

CE

OE

VPP

O0 - O7

VCC

VSS

NC

NU

Function

Address Inputs

Chip Enable

Output Enable

Programming Voltage

Data Output

+5V or +3V Power Supply

Ground

No Connection; No Internal

Connection

Not Used; No External Connection Is

Allowed

TABLE 1-2: READ OPERATION DC CHARACTERISTICS

VCC = +5V ±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"

VIH

2.0

VCC+1

V

Logic "0"

VIL -0.5

0.8

V

Input Leakage

all

ILI

-10

10

µA VIN = 0 to VCC

Output Voltages

all Logic "1"

Logic "0"

VOH 2.4

VOL

0.45

V IOH = -400 µA

V IOL = 2.1 mA

Output Leakage

all

—

ILO

-10

10

µA VOUT = 0V to VCC

Input Capacitance

all

—

CIN

—

6

pF VIN = 0V; Tamb = 25°C;

f = 1 MHz

Output Capacitance

all

—

COUT —

12

pF VOUT = 0V; Tamb = 25°C;

f = 1 MHz

Power Supply Current,

Active

C

TTL input

ICC1

— 20 @ 5.0V mA VCC = 5.5V; VPP = VCC

8 @ 3.0V mA f = 1 MHz;

I

TTL input

ICC2 — 25 @ 5.0V mA OE = CE = VIL;

10 @ 3.0V mA IOUT = 0 mA;

VIL = -0.1 to 0.8V;

VIH = 2.0 to VCC;

Note 1

Power Supply Current,

Standby

C

TTL input ICC(S)

I

TTL input

all CMOS input

— 1 @ 3.0V mA

2 @ 3.0V mA

100 @ 3.0V µA CE=VCC ± 0.2V

* 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.

DS11020H-page 2

 2004 Microchip Technology Inc.

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