TM4EP72BPB, TM4EP72BJB, 4194304 BY 72BIT

TM4EP72CPB, TM4EP72CJB 4194304 BY 72BIT

EXTENDEDDATAOUT BUFFERED DYNAMIC RAM MODULES

SMMS686A − AUGUST 1997 − REVISED FEBRUARY 1998

8

POST OFFICE BOX 1443

capacitance

over recommended ranges of supply voltage and ambient temperature,

f = 1 MHz (see Note 2)

PARAMETER

’4EP72xxB

UNIT

PARAMETER

MIN

MAX

UNIT

Ci(A)

Input capacitance, A0 − A10

6

pF

Ci(OE)

Input capacitance, OEx

6

pF

Ci(CAS)

Input capacitance, CASx

6

pF

Ci(RAS)

Input capacitance, RASx

65

pF

Ci(W)

Input capacitance, WEx

6

pF

Co

Output capacitance

9

pF

NOTE 2: VDD= NOM supply voltage ± 10%, and the bias on pins under test is 0 V.

switching characteristics over recommended ranges of supply voltage and ambient temperature

(see Note 3)

PARAMETER

’4EP72xxB-50

’4EP72xxB-60

’4EP72xxB-70

UNIT

PARAMETER

MIN

MAX

MIN

MAX

MIN

MAX

UNIT

tAA

Access time from column address (see Note 4)

30

35

40

ns

tCAC

Access time from CASx (see Note 4)

18

20

23

ns

tCPA

Access time from CASx precharge (see Note 4)

33

40

45

ns

tRAC

Access time from RASx (see Note 4)

50

60

70

ns

tOEA

Access time from OEx (see Note 4)

18

20

23

ns

tCLZ

Delay time, CASx to output in low impedance

2

2

2

ns

tREZ

Output buffer turn off delay from RASx (see Note 5)

3

13

3

15

3

18

ns

tCEZ

Output buffer turn off delay from CASx (see Note 5)

5

18

5

20

5

23

ns

tOEZ

Output buffer turn off delay from OEx (see Note 5)

5

18

5

20

5

23

ns

tWEZ

Output buffer turn off delay from WEx (see Note 5)

3

13

3

15

3

18

ns

NOTES:

3. With ac parameters, it is assumed that tT = 2 ns.

4. Access times are measured with output reference levels of VOH = 2 V and VOL = 0.8 V.

5. The maximum values of tREZ, tCEZ, tOEZ, and tWEZ are specified when the outputs are no longer driven. Data in must not be driven

until one of the applicable maximum values is satisfied.

EDO timing requirements (see Note 3)

’4EP72xxB-50

’4EP72xxB-60

’4EP72xxB-70

UNIT

MIN

MAX

MIN

MAX

MIN

MAX

UNIT

tHPC

Cycle time, EDO page mode, read-write

20

25

30

ns

tPRWC Cycle time, EDO read-write

55

64

71

ns

tCSH

Delay time, RASx active to CASx precharge

38

46

56

ns

tCHO

Hold time, OEx from CASx

7

10

10

ns

tDOH

Hold time, output from CASx

5

5

5

ns

tCAS

Pulse duration, CASx active

8

10 000

10

10 000

12

10 000

ns

tWPE

Pulse duration, WEx active (output disable only)

7

7

7

ns

tOCH

Setup time, OEx before CASx

8

10

10

ns

tCP

Pulse duration, CASx precharge

8

10

10

ns

tOEP

Precharge time, OEx

5

5

5

ns

NOTE 3: With ac parameters, it is assumed that tT = 2 ns.