21

AC Test Circuit

AC Testing Input, Output Waveforms

Burn-In Circuits

FIGURE 30. WRITE TIMING

FIGURE 31. READ TIMING

WR

DATA

A0-A1,

CS

BUS

tWW (9)

tDW (10)

tWD (11)

tWA (8)

tAW (7)

RD

DATA

A0-A1,

CS

BUS

tRR (3)

tRA (2)

tAR (1)

VALID

(4) tRD

tDF (5)

HIGH IMPEDANCE

R1

V1

OUTPUT FROM

DEVICE UNDER

TEST

NOTE: Includes STRAY and JIG Capacitance

TEST

POINT

C1

R2

(SEE NOTE)

TEST CONDITION DEFINITION TABLE

TEST CONDITION

V1

R1

R2

C1

1

1.7V

523

Ω

Open

150pF

2k

Ω

1.7k

Ω

50pF

3

1.5V

750

Ω

Open

50pF

INPUT

VIH + 0.4V

VIL - 0.4V

1.5V

1.5V

VOH

VOL

OUTPUT

AC Testing: All AC Parameters tested as per test circuits. Input RISE and

FALL times are driven at 1ns/V.

DIP

NOTES:

2. VIH = 4.5V

± 10%

3. VIL = -0.2V to 0.4V

4. GND = 0V

F7

F8

F9

F4

F3

GND

F0

F1

F10

F6

F7

F8

F9

F6

F7

F8

F9

F10

F6

33

34

35

36

37

38

40

32

31

30

29

24

25

26

27

28

21

22

23

13

2

3

4

5

6

7

8

9

10

11

12

14

15

16

17

18

19

20

39

1

F12

F13

F14

F2

F5

F15

F11

F12

F13

F14

F15

F11

F12

F13

F14

F15

F11

F12

F11

C1

F10

WS82C55A-5

40L

WS82C55A