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White Electronic Designs Corporation • (508) 366-5151 • www.whiteedc.com

July 2002 Rev. 1A

ECO #15432

WED8L24257V

*Stress greater than those listed under "Absolute Maximum Ratings" may cause permanent

damage to the device. This is a stress rating only and functional operation of the device at

these or any other conditions greater than those indicated in the operational sections of this

specification is not implied. Exposure to absolute maximum rating conditions for extended

periods may affect reliability.

NOTE: For TEHQZ,TGHQZ and TWLQZ, Figure 3

ABSOLUTE MAXIMUM RATINGS

AC TEST CONDITIONS

RECOMMENDEDDCOPERATINGCONDITIONS

Input Pulse Levels

VSS to 3.0V

Input Rise and Fall Times

5ns

Input and Output Timing Levels

1.5V

OutputLoad

Figure 2

Voltage on any pin relative to VSS

-0.5V to 4.6V

OperatingTemperatureTA(Ambient)

Commercial

0°C to + 70°C

Industrial

-40°C to +85°C

StorageTemperature

-55°C to +125°C

Power Dissipation

1.5 Watts

Output Current

50 mA

Parameter

Sym

Min

Typ

Max Units

Supply Voltage

VCC

3.135

3.3

3.465

V

Supply Voltage

VSS

000V

Input High Voltage

VIH

2.2

-- VCC+0.3 V

Input Low Voltage

VIL

-0.3

--

0.8

V

FIG. 2

FIG. 3

(f=1.0MHz, VIN=VCC or VSS)

These parameters are sampled, not 100% tested.

DCELECTRICALCHARACTERISTICS

TRUTHTABLE

CAPACITANCE

G

E

W

Mode

Output

Power

X

H

X

Standby

High Z

ICC2,ICC3

H

L

H

OutputDeselect

High Z

ICC1

L

L

H

Read

DOUT

ICC1

X

L

L

Write

DIN

ICC1

353

Ω

5 pF

319

Ω

VCC

Ω

Q

Z0 = 50

Ω

Ω

65 pF

Parameter

Sym

Conditions

Min

Max

Units

10ns

12-15ns

Operating Power Supply Current

ICC1

W = VIL, II/O = 0

mA,

50

0480mA

Min Cycle

Standby (TTL) Supply Current

ICC2

E > VIH, VIN < VIL or

150150mA

VIN > VIH, f=ØMHz

Full Standby CMOS

ICC3

E > VCC-0.2V

90

90

mA

Supply Current

VIN > VCC-0.2V or

VIN < 0.2V

Input Leakage Current

ILI

VIN = 0V to VCC

±10

±10

µA

Output Leakage Current

ILO

V I/O = 0V to VCC

±10

±10

µA

Output High Volltage

VOH

IOH = -4.0mA

2.4

V

Output Low Voltage

VOL

IOL = 4.0mA

0.4

0.4

V

Parameter

Sym

Max

Unit

Address Lines

CA

8

pF

DataLines

CD/Q

10pF

Write & Output Enable Lines

W, G

8

pF

Chip Enable Lines

EØ-E2

8

pF