6.42

IDT71321SA/LA and IDT71421SA/LA

High Speed 2K x 8 Dual-Port Static RAM with Interrupts

Industrial and Commercial Temperature Ranges

2

IDT71321/421J

PLCC

INDEX

I/O

A

A

A

A

A

A

A

A

A

I/O

I/O

I/O

1L

2L

3L

4L

5L

6L

7L

8L

9L

0L

1L

3L

2L

OE

A

A

A

A

A

A

A

A

A

A

NC

I/O

R

0R

1R

2R

3R

4R

5R

6R

7R

8R

9R

7R

1

2

3

4

5

6

747

48

49

50

51

52

9

8

10

11

12

13

14

15

16

17

18

19

20

27

26

25

24

23

22

21

33

32

31

30

29

28

35

34

36

37

38

39

40

41

42

43

44

45

46

2691 drw 02

,

INDEX

IDT71321/421PF or TF

64-Pin TQFP

64-Pin STQFP

8

9

10

11

12

13

14

15

16

1

2

3

4

5

6

7

46

45

44

43

42

41

40

39

38

37

36

35

34

47

48

33

N/C

N/C

N/C

N/C

N/C

2691 drw 03

,

Description

The IDT71321/IDT71421 are high-speed 2K x 8 Dual-Port Static

RAMs with internal interrupt logic for interprocessor communications.

The IDT71321 is designed to be used as a stand-alone 8-bit Dual-

Port Static RAM or as a "MASTER" Dual-Port Static RAM together

with the IDT71421 "SLAVE" Dual-Port in 16-bit-or-more word width

systems. Using the IDT MASTER/SLAVE Dual-Port Static RAM ap-

proach in 16-or-more-bit memory system applications results in full

speed, error-free operation without the need for additional discrete

logic.

Both devices provide two independent ports with separate control,

address, and I/O pins that permit independent, asynchronous access

for reads or writes to any location in memory. An automatic power

down feature, controlled by

CE, permits the on chip circuitry of each

port to enter a very low standby power mode.

Fabricated using IDT's CMOS high-performance technology, these

devices typically operate on only 325mW of power. Low-power (LA)

versions offer battery backup data retention capability, with each Dual-

Port typically consuming 200µW from a 2V battery.

The IDT71321/IDT71421 devices are packaged in 52-pin PLCCs,

64-pin TQFPs, and 64-pin STQFPs.

NOTES:

2. All GND pins must be connected to ground supply.

3. J52-1 package body is approximately .75 in x .75 in x .17 in.

PN64-1 package body is approximately 14mm x 14mm x 1.4mm.

PP64-1 package body is approximately 10mm x 10mm x 1.4mm.

4. This package code is used to reference the package diagram.

5. This text does not indicate orientation of the actual part-marking.