TM4EP64BJN, TM4EP64BPN, TM4EP64CJN, TM4EP64CPN 4194304 BY 64-BIT

TM4EP72BJN, TM4EP72BPN, TM4EP72CJN, TM4EP72CPN 4194304 BY 72-BIT

EXTENDED-DATA-OUT DYNAMIC RAM MODULES

SMMS682A – AUGUST 1997– REVISED MARCH 1998

11

POST OFFICE BOX 1443

capacitance

over recommended ranges of supply voltage and ambient temperature,

f = 1 MHz (see Note 2)

PARAMETER

’4EP64xxN

’4EP72xxN

UNIT

PARAMETER

MIN

MAX

MIN

MAX

UNIT

Ci(A)

Input capacitance, A0 – A11

82

92

pF

Ci(OE)

Input capacitance, OEx

58

65

pF

Ci(CAS)

Input capacitance, CASx

16

23

pF

Ci(RAS)

Input capacitance, RASx

58

65

pF

Ci(W)

Input capacitance, WEx

58

65

pF

Co

Output capacitance

8

8

pF

Ci/o(SDA) Input/output capacitance, SDA input

9

9

pF

Ci(SPD)

Input capacitance, SA0, SA1, SA2, SCL inputs

7

7

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

’4EP64xxN-50

’4EP72xxN-50

’4EP64xxN-60

’4EP72xxN-60

’4EP64xxN-70

’4EP72xxN-70

UNIT

MIN

MAX

MIN

MAX

MIN

MAX

tAA

Access time from column address (see Note 4)

25

30

35

ns

tCAC

Access time from CASx (see Note 4)

13

15

18

ns

tCPA

Access time from CASx precharge (see Note 4)

28

35

40

ns

tRAC

Access time from RASx (see Note 4)

50

60

70

ns

tOEA

Access time from OEx (see Note 4)

13

15

18

ns

tCLZ

Delay time, CASx to output in low impedance

0

0

0

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)

3

13

3

15

3

18

ns

tOEZ

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

3

13

3

15

3

18

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 tWEZarespecifiedwhentheoutputsarenolongerdriven.Data-inshouldnotbedriven

until one of the applicable maximum values is satisfied.