MCM6946

9

MOTOROLA FAST SRAM

P

Sb l

MCM6946–8

MCM6946–10

MCM6946–12

MCM6946–15

Ui

N

Parameter

Symbol

Min

Max

Min

Max

Min

Max

Min

Max

Unit

Notes

Write Cycle Time

tAVAV

8

—

10

—

12

—

15

—

ns

4

Address Setup Time

tAVEL

0

—

0

—

0

—

0

—

ns

Address Valid to End of Write

tAVEH

7

—

9

—

10

—

12

—

ns

Address Valid to End of Write (G High)

tAVEH

7

—

8

—

9

—

10

—

ns

Enable Pulse Width

tELEH,

tELWH

8

—

9

—

10

—

12

—

ns

5, 6

Enable Pulse Width (G High)

tELEH,

tELWH

7

—

8

—

9

—

10

—

ns

5, 6

Data Valid to End of Write

tDVEH

5

—

5

—

6

—

7

—

ns

Data Hold Time

tEHDX

0

—

0

—

0

—

0

—

ns

Write Recovery Time

tEHAX

0

—

0

—

0

—

0

—

ns

NOTES:

1. A write occurs during the overlap of E low and W low.

2. Product sensitivities to noise require proper grounding and decoupling of power supplies as well as minimization or elimination of bus

contention conditions during read and write cycles.

3. If G goes low coincident with or after W goes low, the output will remain in a high–impedance state.

4. All write cycle timing is referenced from the last valid address to the first transitioning address.

5. If E goes low coincident with or after W goes low, the output will remain in a high–impedance condition.

6. If E goes high coincident with or before W goes high, the output will remain in a high–impedance condition.

DATA VALID

HIGH–Z

tAVAV

tAVEH

tAVEL

tELWH

tEHAX

tDVEH

tEHDX

A (ADDRESS)

E (CHIP ENABLE)

W (WRITE ENABLE)

D (DATA IN)

Q (DATA OUT)

tELEH

Motorola Memory Prefix

Part Number

Package (YJ = 400 mil SOJ, TS = 44–Lead

TSOP Type II)

Shipping Method (R = Tape and Reel, Blank = Rails)

Speed (8 = 8 ns, 10 = 10 ns, 12 = 12 ns,

15 = 15 ns)

MCM 6946 XX XX XX

ORDERING INFORMATION

(Order by Full Part Number)

Full Part Numbers — MCM6946YJ8

MCM6946YJ10

MCM6946YJ12

MCM6946YJ15

MCM6946YJ8R

MCM6946YJ10R

MCM6946YJ12R

MCM6946YJ15R

MCM6946TS8

MCM6946TS10

MCM6946TS12

MCM6946TS15

MCM6946TS8R

MCM6946TS10R

MCM6946TS12R

MCM6946TS15R