SYMBOL

PARAMETER

WS27C256L-12

WS27C256L-15

WS27C256L-20

UNITS

MIN

MAX

MIN

MAX

MIN

MAX

Address to Output Delay

120

150

200

CE to Output Delay

120

150

200

OE to Output Delay

35

40

40

Output Disable to Output Float

35

40

40

ns

(Note 3)

Output Hold From Addresses,

CE or OE, Whichever Occurred

0

0

0

First (Note 3)

SYMBOL

PARAMETER

TEST CONDITIONS

MIN

MAX

UNITS

Input Low Voltage

–0.5

0.8

V

Input High Voltage

2.0

V

Output Low Voltage

0.4

V

Output High Voltage

3.5

V

100

µA

1mA

F = 5 MHz

40

mA

(Note 1)

F = 8 MHz

50

mA

100

µA

V

Input Leakage Current

–10

10

µA

Output Leakage Current

–10

10

µA

WS27C256L

4-20

OPERATING RANGE

RANGE

TEMPERATURE

Military

–55°C to +125°C

+5V ± 10%

ABSOLUTE MAXIMUM RATINGS*

Storage Temperature............................–65° to + 150°C

Voltage on any Pin with

Respect to Ground ....................................–0.6V to +7V

Respect to Ground ....................................–0.6V to +7V

ESD Protection ..................................................

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 of

time may affect device reliability.

NOTE:

3. This parameter is only sampled and is not 100% tested. Output Float is defined as the point where data is no longer driven – see timing

diagram.