93LC56A/B

DS21208A-page 2

Preliminary

© 1997 Microchip Technology Inc.

1.0

ELECTRICAL

CHARACTERISTICS

1.1

Maximum Ratings*

All inputs and outputs 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

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

°C

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

*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 extended peri-

ods may affect device reliability.

TABLE 1-1

PIN FUNCTION TABLE

Name

Function

CS

Chip Select

CLK

Serial Data Clock

DI

Serial Data Input

DO

Serial Data Output

Ground

NC

No Connect

Power Supply

TABLE 1-2

DC AND AC ELECTRICAL 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

Parameter

Symbol

Min.

Max.

Units

Conditions

High level input voltage

2.0

Vcc +1

V

2.7V

0.7 Vcc

Vcc +1

V

Low level input voltage

-0.3

0.8

V

-0.3

0.2 Vcc

V

Low level output voltage

—

0.4

V

—

0.2

V

µA; Vcc = Vcc Min.

High level output voltage

2.4

—

V

µA; Vcc = 4.5V

Vcc-0.2

—

V

µA; Vcc = Vcc Min.

Input leakage current

-10

10

µA

Output leakage current

-10

10

µA

Pin capacitance

(all inputs/outputs)

—

7

pF

Tamb = +25

°C, Fclk = 1 MHz

Operating current

—

1

500

mA

µA

—

1.5

mA

Standby current

—

1

µA

Clock frequency

—

2

1

MHz

MHz

Clock high time

250

—

ns

Clock low time

250

—

ns

Chip select setup time

50

—

ns

Relative to CLK

Chip select hold time

0

—

ns

Relative to CLK

Chip select low time

250

—

ns

Data input setup time

100

—

ns

Relative to CLK

Data input hold time

100

—

ns

Relative to CLK

Data output delay time

—

400

ns

Cl = 100 pF

Data output disable time

—

100

ns

Cl = 100 pF (Note 2)

Status valid time

—

500

ns

Cl = 100 pF

Program cycle time

—

6

ms

ERASE/WRITE mode

—

6

ms

ERAL mode

—

15

ms

WRAL mode

Endurance

—

1M

—

cycles

25

Note 1: This parameter is tested at Tamb = 25

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

3: This application is not tested but guaranteed by characterization. For endurance estimates in a specific application, please consult the Total

Endurance Model which may be obtained on Microchip’s BBS or website.