WS128K32-XXX

September 2010

© 2010 Microsemi Corporation. All rights reserved.

4

Microsemi Corporation • (602) 437-1520 • www.whiteedc.com

Rev. 18

www.microsemi.com

Microsemi Corporation reserves the right to change products or specifications without notice.

AC CHARACTERISTICS

VCC = 5.0V, GND = 0V, -55°C ≤ TA ≤ +125°C

Parameter

Read Cycle

Symbol

-15

-17

-20

-25

-35

-45

-55

Units

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Read Cycle Time

tRC

15

17

20

25

35

45

55

ns

Address Access Time

tAA

15

17

20

25

35

45

55

ns

Output Hold from Address Change

tOH

0000000

ns

Chip Select Access Time

tACS

15

17

20

25

35

45

55

ns

Output Enable to Output Valid

tOE

10

10

12

15

20

25

30

ns

Chip Select to Output in Low Z

tCLZ1

3333333

ns

Output Enable to Output in Low Z

tOLZ1

0000000

ns

Chip Disable to Output in High Z

tCHZ1

12

12

12

12

15

20

20

ns

Output Disable to Output in High Z

tOHZ1

12

12

12

12

15

20

20

ns

1. This parameter is guaranteed by design but not tested.

AC CHARACTERISTICS

VCC = 5.0V, GND = 0V, -55°C ≤ TA ≤ +125°C

Parameter

Write Cycle

Symbol

-15

-17

-20

-25

-35

-45

-55

Units

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Write Cycle Time

tWC

15

17

20

25

35

45

55

ns

Chip Select to End of Write

tCW

14

14

15

20

25

30

45

ns

Address Valid to End of Write

tAW

14

15

15

20

25

30

45

ns

Data Valid to End of Write

tDW

10

10

12

15

20

25

25

ns

Write Pulse Width

tWP

14

14

15

20

25

30

45

ns

Address Setup Time

tAS

0000000

ns

Address Hold Time

tAH

0000000

ns

Output Active from End of Write

tOW1

3333444

ns

Write Enable to Output in High Z

tWHZ1

10

10

12

15

20

25

25

ns

Data Hold Time

tDH

0000000

ns

1. This parameter is guaranteed by design but not tested.

FIGURE. 4 – AC TEST CIRCUIT

AC Test Conditions

Parameter

Typ

Unit

Input Pulse Levels

VIL = 0, VIH = 3.0

V

Input Rise and Fall

5

ns

Input and Output Reference Level

1.5

V

Output Timing Reference Level

1.5

V

Notes:

VZ is programmable from -2V to +7V.

IOL & IOH programmable from 0 to 16mA.

Tester Impedance Z0 = 75 Ω.

VZ is typically the midpoint of VOH and VOL.

IOL & IOH are adjusted to simulate a typical resistive load circuit.

ATE tester includes jig capacitance.