SN74ACT2236

1024 × 9 × 2

ASYNCHRONOUS BIDIRECTIONAL FIRST IN, FIRST OUT MEMORY

SCAS149A − APRIL 1990 − REVISED SEPTEMBER 1995

9

POST OFFICE BOX 655303

POST OFFICE BOX 1443

electrical characteristics over recommended operating free-air temperature range (unless

otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VOH

VCC = 4.5 V,

IOH = − 8 mA

2.4

V

VOL

Flags

VCC = 4.5 V,

IOL = 8 mA

0.5

V

VOL

I/O ports

VCC = 4.5 V,

IOL = 16 mA

0.5

V

II

VCC = 5.5 V,

VI = VCC or 0

±5

µA

IOZ

VCC = 5.5 V,

VO = VCC or 0

±5

µA

ICC‡

VI = VCC − 0.2 V or 0

10

400

µA

∆ICC§

DIR, OE

VCC = 5.5 V,

One input at 3.4 V,

Other inputs at VCC or GND

2

mA

∆ICC§

Other inputs

VCC = 5.5 V,

One input at 3.4 V,

Other inputs at VCC or GND

1

mA

Ci

VI = 0,

f = 1 MHz

4

pF

Co

VO = 0,

f = 1 MHz

8

pF

† All typical values are at VCC = 5 V, TA = 25°C.

‡ ICC tested with outputs open.

§ This is the supply current when each input is at one of the specified TTL voltage levels rather than 0 V or VCC.

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

PARAMETER

FROM

TO

′ACT2236-20

′ACT2236-30

′ACT2236-40

′ACT2236-60

UNIT

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

MIN

TYP†

MAX

MIN

MAX

MIN

MAX

MIN

MAX

UNIT

fmax

LDCK

50

33

25

16.7

MHz

fmax

UNCK

50

33

25

16.7

MHz

tpd

LDCK

↑, LDCKB↑

B or A

8

23

8

23

8

25

8

27

ns

tpd

UNCKA

↑,

UNCKB

↑

B or A

10

17

25

10

25

10

35

10

45

ns

tPLH

LDCK

↑, LDCKB↑

EMPTYA,

EMPTYB

4

15

4

15

4

17

4

19

ns

tPHL

UNCKA

↑,

UNCKB

↑

EMPTYA,

EMPTYB

2

17

2

17

2

19

2

21

ns

tPHL

RSTA

↓, RSTB↓

EMPTYA,

EMPTYB

2

18

2

18

2

20

2

22

ns

tPHL

LDCK

↑, LDCKB↑

FULLA, FULLB

4

15

4

15

4

17

4

19

ns

tPLH

UNCKA

↑,

UNCKB

↑

FULLA, FULLB

4

15

4

15

4

17

4

19

ns

tPLH

RSTA

↓, RSTB↓

FULLA, FULLB

2

15

2

15

2

17

2

19

ns

tPLH

RSTA

↓, RSTB↓

AF/AEA, AF/AEB

2

15

2

15

2

17

2

19

ns

tPLH

LDCK

↑, LDCKB↑

HFA, HFB

2

15

2

15

2

17

2

19

ns

tPHL

UNCKA

↑,

UNCKB

↑

HFA, HFB

4

19

4

19

4

21

4

23

ns

tPHL

RSTA

↓, RSTB↓

HFA, HFB

1

15

1

15

1

17

1

19

ns

tpd

SAB or SBA¶

B or A

1

11

1

11

1

13

1

15

ns

tpd

A or B

B or A

1

11

1

11

1

13

1

15

ns

tpd

LDCK

↑, LDCKB↑ AF/AEA, AF/AEB

2

19

2

19

2

21

2

23

ns

tpd

UNCKA

↑,

UNCKB

↑

AF/AEA, AF/AEB

2

19

2

19

2

23

2

23

ns

ten

DIR, OE

A or B

2

12

2

12

2

14

2

16

ns

tdis

DIR, OE

A or B

1

10

1

10

1

12

1

14

ns

† All typical values are at VCC = 5 V, TA = 25°C.

¶ These parameters are measured with the internal output state of the storage register opposite to that of the bus input.