SN74ACT3631

512

× 36

CLOCKED FIRST-IN, FIRST-OUT MEMORY

SCAS246G – AUGUST 1993 – REVISED APRIL 1998

23

POST OFFICE BOX 655303

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

PARAMETER

’ACT3631-15

’ACT3631-20

’ACT3631-30

UNIT

PARAMETER

MIN

MAX

MIN

MAX

MIN

MAX

UNIT

fmax

66.7

50

33.4

MHz

ta

Access time, CLKB

↑ to B0–B35

3

11

3

13

15

ns

tpd(C-IR)

Propagation delay time, CLKA

↑ to IR

0

8

0

10

0

12

ns

tpd(C-OR)

Propagation delay time, CLKB

↑ to OR

1

8

1

10

1

12

ns

tpd(C-AE)

Propagation delay time, CLKB

↑ to AE

1

8

1

10

1

12

ns

tpd(C-AF)

Propagation delay time, CLKA

↑ to AF

1

8

1

10

1

12

ns

tpd(C-MF)

Propagation delay time, CLKA

↑ to MBF1 low or MBF2 high and

CLKB

↑ to MBF2 low or MBF1 high

0

8

0

10

0

12

ns

tpd(C-MR)

Propagation delay time, CLKA

↑ to B0–B35† and CLKB↑ to

A0 – A35‡

3

13.5

3

15

3

17

ns

tpd(M-DV)

Propagation delay time, MBB to B0 – B35 valid

3

13

3

15

3

17

ns

tpd(R-F)

Propagation delay time, RST low to AE low and AF high

1

15

1

20

1

30

ns

ten

Enable time, CSA and W/RA low to A0 – A35 active and CSB

low and W/RB high to B0 – B35 active

2

12

2

13

2

14

ns

tdis

Disable time, CSA or W/RA high to A0 – A35 at high impedance

and CSB high or W/RB low to B0 – B35 at high impedance

1

10

1

11

1

12

ns

† Writing data to the mail1 register when the B0 – B35 outputs are active and MBB is high

‡ Writing data to the mail2 register when the A0 – A35 outputs are active and MBA is high