W49V002FA

Publication Release Date: February 19, 2002

- 21 -

Revision A2

FWH INTERFACE MODE AC CHARACTERISTICS

AC Test Conditions

PARAMETER

CONDITIONS

Input Pulse Levels

Input Rise/Fall Slew Rate

1 V/nS

Input/Output Timing Level

Output Load

AC Test Load and Waveform

10 pF

Input

Test Point

Test Point

Output

10 pF

25

Ω

25

Ω

Test when output from low to high

Test when output from high to low

Read/Write Cycle Timing Parameters

PARAMETER

SYMBOL

W49V002FA

UNIT

MIN.

MAX.

Clock Cycle Time

30

-

nS

Input Set Up Time

7

-

nS

Input Hold Time

0

-

nS

Clock to Data Valid

-

11

nS

Reset Timing Parameters

PARAMETER

SYM.

MIN.

TYP.

MAX.

UNIT

1

-

-

mS

Clock Stable to Reset Active

100

-

-

µS

Reset Pulse Width

100

-

-

nS

Reset Active to Output Float

-

-

50

nS

Reset Inactive to Input Active

1

-

-

µS

Note: All AC timing signals observe the following guidelines for determining setup and hold times:

(a) High level signal's reference level is input high and (b) low level signal's reference level is input low.

Ref. to the AC testing condition.