27C128

DS11003K-page 4

© 1996 Microchip Technology Inc.

TABLE 1-4:

PROGRAMMING DC CHARACTERISTICS

TABLE 1-5:

PROGRAMMING AC CHARACTERISTICS

Ambient Temperature: Tamb = 25

°C ± 5°C

Parameter

Status

Symbol

Min

Max.

Units

Conditions

Input Voltages

Logic”1”

Logic”0”

2.0

-0.1

0.8

V

V

Input Leakage

—

-10

10

Output Voltages

Logic”1”

Logic”0”

2.4

0.45

V

V

µA

—

—

20

mA

Note 1

—

—

25

mA

Note 1

A9 Product Identification

—

11.5

12.5

V

for Program, Program Verify

AC Testing Waveform:

and Program Inhibit Modes

Ambient Temperature:

Tamb=25

°C± 5°C

Parameter

Symbol

Min

Max

Units

Remarks

Address Set-Up Time

2—

µs

Data Set-Up Time

2—

µs

Data Hold Time

2—

µs

Address Hold Time

0—

µs

Float Delay (2)

0

130

ns

2—

µs

Program Pulse Width (1)

95

105

µs

100

µs typical

CE Set-Up Time

2—

µs

OE Set-Up Time

2—

µs

2—

µs

Data Valid from OE

—

100

ns

Note 1: For express algorithm, initial programming width tolerance is 100

µs ±5%.

2: This parameter is only sampled and not 100% tested. Output float is defined as the point where data is no

longer driven (see timing diagram).