WE512K8, WE256K8,

WE128K8-XCX

4

White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com

White Electronic Designs

May 2000

Rev. 1

White Electronic Designs Corp. reserves the right to change products or specifications without notice.

FIGURE 4

AC Test Circuit

DC CHARACTERISTICS

Parameter

Symbol Conditions

512K x 8

256K x 8

128K x 8

Unit

Min

Typ

Max

Min

Typ

Max

Min

Typ

Max

Input Leakage Current

10

10

10

µA

Output Leakage Current

10

10

10

µA

Dynamic Supply Current

80

100

60

90

50

70

mA

Standby Current

3

8

2

6

1

4

mA

Output Low Voltage

0.45

0.45

0.45

V

Output High Voltage

2.4

2.4

2.4

V

NOTE: DC test conditions: Vih = Vcc -0.3V, Vil = 0.3V

TRUTH TABLE

CS#

OE#

WE#

Mode

Data I/O

H

X

X

Standby

High Z

L

L

H

Read

Data Out

L

H

L

Write

Data In

X

H

X

Out Disable

High Z/Data Out

X

X

H

Write

X

L

X

Inhibit

CAPACITANCE

Parameter

Sym

Condition

512Kx8

Max

256Kx8

Max

128Kx8

Max

Unit

Input

Capacitance

45

80

45

pF

Output

Capacitance

60

80

60

pF

This parameter is guaranteed by design but not tested.

ABSOLUTE MAXIMUM RATINGS

Parameter

Symbol

Unit

Operating Temperature

-55 to +125

°C

Storage Temperature

-65 to +150

°C

Signal Voltage Any Pin

-0.6 to + 6.25

V

Voltage on OE# and A9

-0.6 to +13.5

V

Thermal Resistance junction

to case

28

°C/W

Lead Temperature

(soldering -10 secs)

+300

°C

NOTE:

Stresses above 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 above those indicated in the operational sections of

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

extended periods may affect device reliability.

RECOMMENDED OPERATING CONDITIONS

Parameter

Symbol

Min

Max

Unit

Supply Voltage

4.5

5.5

V

Input High Voltage

2.0

V

Input Low Voltage

-0.3

+0.8

V

Operating Temp. (Mil.)

-55

+125

°C

Operating Temp. (Ind.)

-40

+85

°C

AC TEST CONDITIONS

Parameter

Typ

Unit

Input Pulse Levels

V

Input Rise and Fall

5

ns

Input and Output Reference Level

1.5

V

Output Timing Reference Level

1.5

V

Tester Impedance Z0 = 75Ω.

ATE tester includes jig capacitance.