6.42

IDT71342SA/LA

High-Speed 4K x 8 Dual-Port Static RAM with Semaphore

Industrial and Commercial Temperature Ranges

2

2721 drw 02

IDT71342J

52-Pin PLCC

INDEX

N/C

46

45

44

43

42

41

40

39

38

37

36

35

34

8

9

10

11

12

13

14

15

16

17

18

19

20

47

48

49

50

51

52

1

2

3

4

5

6

7

33

32

31

30

29

28

27

26

25

24

23

22

21

NOTES:

1. All Vcc pins must be connected to power supply.

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

3. J52 package body is approximately .79 in x .79 in x .17 in.

PN64 package body is approximately 14mm x 14mm 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.

INDEX

71342PF

64-Pin TQFP

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

2721 drw 03

Description

The IDT71342 is a high-speed 4K x 8 Dual-Port Static RAM with full

on-chip hardware support of semaphore signalling between the two

ports.

The IDT71342 provides 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. To assist in

arbitrating between ports, a fully independent semaphore logic block

is provided. This block contains unassigned flags which can be

accessedbyeitherside;however,onlyonesidecancontroltheflagatany

time. An automatic power down feature, controlled by

CE and SEM,

permitstheon-chipcircuitryofeachporttoenteravery lowstandbypower

mode (both

CE and SEM HIGH).

Fabricated using IDT’s CMOS high-performance technology, this

device typically operates on only 700mW of power. Low-power (LA)

versions offer battery backup data retention capability, with each port

typically consuming 200µW from a 2V battery. The device is packaged

in either a 64-pin TQFP or a 52-pin PLCC.