HT23C020 View Datasheet(PDF) - Holtek Semiconductor

Part Name

Description

Manufacturer

HT23C020

CMOS 256K×8-Bit Mask ROM

Holtek Semiconductor 

HT23C020

Supply voltage: 4.5V~5.5V

Ta=–40°C to 85°C

Symbol

Parameter

VCC

Operating Voltage

ICC

Operating Current

Test Conditions

VCC Conditions

—

—

5V

O/P Unload,

f= 5MHz

Min. Typ. Max. Unit

4.5 — 5.5 V

— — 25 mA

VIL

Input Low Voltage

5V

—

VSS — 0.8 V

VIH

Input High Voltage

5V

—

2.2 — VCC V

VOL

Output Low Voltage

5V IOL= 3.2mA

— — 0.4 V

VOH Output High Voltage

5V IOH= –1mA

2.4 — VCC V

ILI

Input Leakage Current

5V VIN= 0 to VCC

—

—

10 µA

ILO

Output Leakage Current

5V VOUT= 0 to VCC

—

—

10 µA

ISTB1 Standby Current

5V

CE=VIL

CE=VIH

— — 1.5 mA

ISTB2 Standby Current

5V

CE≤0.2V

CE≥VCC-0.2V

—

—

30 µA

CIN

Input Capacitance (See note)

— f= 1MHz

— — 10 pF

COUT Output Capacitance (See note) — f= 1MHz

— — 10 pF

Note: These parameters are periodically sampled but not 100% tested.

A.C. Characteristics

Ta=–40°C to 85°C

Symbol

Parameter

VCC=2.7V~3.6V VCC=4.5V~5.5V

Unit

Min. Max. Min. Max.

tCYC

tAA

tACE

tAOE

tOH

tOD

tOE

Cycle Time

250

—

150

—

ns

Address Access Time

—

250

—

150

ns

Chip Enable Access Time

—

250

—

150

ns

Output Enable Access Time

—

150

—

80

ns

Output Hold Time

—

—

10

—

ns

Output Disable Time (See Note)

—

—

—

70

ns

Output Enable Time (See Note)

—

—

10

—

ns

Note: These parameters are periodically sampled but not 100% tested.

4

21st Aug ’98

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