TMS416400, TMS416400P, TMS417400, TMS417400P

TMS426400, TMS426400P, TMS427400, TMS427400P

4194304-WORD BY 4-BIT HIGH-SPEED DRAMS

SMKS881B – MAY 1995 – REVISED AUGUST 1995

12

POST OFFICE BOX 1443

capacitance over recommended ranges of supply voltage and operating free-air temperature,

f = 1 MHz (see Note 3)

PARAMETER

MIN

MAX

UNIT

Ci(A)

Input capacitance, A0 – A11

5

pF

Ci(OE)

Input capacitance, OE

7

pF

Ci(RC)

Input capacitance, CAS and RAS

7

pF

Ci(W)

Input capacitance, W

7

pF

Co

Output capacitance

7

pF

NOTE 3: VCC = NOM supply voltage ± 10%, and the bias on pins under test is 0 V.

switching characteristics over recommended ranges of supply voltage and operating free-air

temperature

PARAMETER

’4xx400 - 60

’4xx400P - 60

’4xx400 - 70

’4xx400P - 70

’4xx400 - 80

’4xx400P - 80

UNIT

MIN

MAX

MIN

MAX

MIN

MAX

tAA

Access time from column address (see Note 4)

30

35

40

ns

tCAC

Access time from CAS low (see Note 4)

15

18

20

ns

tCPA

Access time from column precharge (see Note 4)

35

40

45

ns

tRAC

Access time from RAS low (see Note 4)

60

70

80

ns

tOEA

Access time from OE low (see Note 4)

15

18

20

ns

tCLZ

Delay time, CAS low to output in low-impedance state

0

0

0

ns

tOH

Output data hold time (from CAS)

3

3

3

ns

tOHO

Output data hold time (from OE)

3

3

3

ns

tOFF

Output disable time after CAS high (see Note 5)

0

15

0

18

0

20

ns

tOEZ

Output disable time after OE high (see Note 5)

0

15

0

18

0

20

ns

NOTES:

4. Access times for TMS42x400 measured with output reference levels of VOH = 2 V and VOL = 0.8 V.

5. tOFF and tOEZ are specified when the output is no longer driven.