HT27C020 View Datasheet(PDF) - Holtek Semiconductor

Part Name

Description

Manufacturer

HT27C020

OTP CMOS 256K×8-Bit EPROM

Holtek Semiconductor 

HT27C020

Programming operation

Symbol

Parameter

tAS

tOES

tDS

tAH

tDH

tDFP

tVPS

tPW

tVCS

tCES

tOE

tPRT

Address Setup Time

OE Setup Time

Data Setup Time

Address Hold Time

Data Hold Time

Output Enable to Output Float

Delay

VPP Setup Time

PGM Program Pulse Width

VCC Setup Time

CE Setup Time

Data Valid from OE

VPP Pulse Rise Time During

Programming

Test Conditions

VCC Conditions

6V

—

6V

—

6V

—

6V

—

6V

—

6V

—

6V

—

6V

—

6V

—

6V

—

6V

—

6V

—

Ta=+25°C±5°C

Min. Typ. Max. Unit

2 — — µs

2 — — µs

2 — — µs

0 — — µs

2 — — µs

0 — 130 ns

2 — — µs

30 75 105 µs

2 — — µs

2 — — ns

— — 150 µs

2 — — µs

Test waveforms and measurements

For -70, -90, -120 devices:

tR, tF< 20ns (10% to 90%)

Output test load

Note: CL=100pF including jig capacitance, except for the

-45 devices, where CL=30pF.

5

10th May ’99

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