TMS44400, TMS44400P, TMS46400, TMS46400P

1048576-WORD BY 4-BIT

DYNAMIC RANDOM-ACCESS MEMORIES

SMHS562C – MAY 1995 – REVISED NOVEMBER 1996

8

POST OFFICE BOX 1443

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

f = 1 MHz (see Note 6)

PARAMETER

MIN

MAX

UNIT

Ci(A)

Input capacitance, A0 – A10

5

pF

Ci(RC)

Input capacitance, CAS and RAS

7

pF

Ci(OE)

Input capacitance, OE

7

pF

Ci(W)

Input capacitance, W

7

pF

Co

Output capacitance

7

pF

NOTE 6: VCC = 5 V ± .5 V for the TMS44400 devices, VCC = 3.3 V ± 0.3 V for the TMS46400 devices, and the bias on pins under test is 0 V.

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

temperature

PARAMETER

’4x400 - 60

’4x400P - 60

’4x400 - 70

’4x400P - 70

’4x400 - 80

’4x400P - 80

UNIT

PARAMETER

MIN

MAX

MIN

MAX

MIN

MAX

UNIT

tAA

Access time from column address

30

35

40

ns

tCAC

Access time from CAS low

15

18

20

ns

tCPA

Access time from column precharge

35

40

45

ns

tRAC

Access time from RAS low

60

70

80

ns

tOEA

Access time from OE low

15

18

20

ns

tCLZ

CAS to output in low impedance

0

0

0

ns

tOFF

Output-disable time after CAS high (see Note 7)

0

15

0

18

0

20

ns

tOEZ

Output-disable time after OE high (see Note 7)

0

15

0

18

0

20

ns

NOTE 7: tOFF is specified when the output is no longer driven.