DESCRIPTION

The Accutek AK631024 SRAM Module consists of fast high perfor-

mance SRAMs mounted on a low profile, 72 pin SIM or ZIP PCB.

The module utilizes four 32 pin 1 Meg x 4 SRAMs in 400 mil SOJ

packages and four decoupling capacitor chips mounted on each

side of a printed circuit board.

The SRAMs used have common I/O functions and single output en-

able functions. Also, four separate chip select (CE) connections are

used to independently enable the four bytes. The modules can be

supplied in a variety of access time values from 15nSEC to 30nSEC

in CMOS or BiCMOS technology.

The Accutek module is designed to have a maximum seated height

of 0.670 inch SIM or 0.550 inch ZIP to provide for the lowest height

off the board. Each conforms to JEDEC-standard sizes and pin-out

configurations. Using four pins for module memory density identifi-

design considerations when changing from one module size to the

other in customer applications.

FEATURES

· 1,048,576 x 32 SRAM module in high density configuration

· JEDEC Standardized 72 pin SIM format

· Common I/O, single OE functions with four separate chip

selects (CE)

· Low height, 0.670 inch SIM or 0.550 inch ZIP maximum

· TTL compatible inputs and outputs

· Single 5 volt power supply - AK6321024W, AK6321054Z

· Single 3.3 volt power supply - AK6321024W/3.3,

AK6321024Z/3.3

· Fast access times range from 15 nSEC BiCMOS to 25 nSEC

· Power

170mA Active (15nS)

165mA Active (17nS)

160mA Active (20nS)

155mA Active (25nS)

10mA Standby

· Downward pin compatible with 512K x 32 (AK632512) - 72 pin

SIM or ZIP, and 256K x 32 (AK632256), 128K x 32 (AK632128),

64K x 32 (AK63264) and 32K x 32 (AK63232) - 64 pin SIM or

ZIP designs

· Operating temperature range in free air, 0

ELECTRICAL SPECIFICATIONS

Timing diagrams and basic electrical characteristics are those of the stan-

dard 1 Meg x 4 SRAMs used to construct these modules. Accutek’s

module design allows the flexibility of selecting industry-compatible 1

Meg x 4 SRAMs from several semiconductor manufacturers.

Accutek

Microcircuit

Corporation

AK6321024W / AK6321024Z

1,048,576 x 32 Bit CMOS/BiCMOS

Static Random Access Memory

1

36

37

72

1

36

37

72

72-Pin SIM

72-Pin ZIP

Front View

PIN NOMENCLATURE

Address Inputs

Chip Enable

Data In/Data Out

OE

Output Enable

Presence Detect

Vcc

5v Supply

Vss

Ground

WE

Write Enable

NC

No Connect

MODULE OPTIONS

Leadless SIM: AK6321024W

Leades ZIP: AK6321024Z

Leaded SIP: AK6321024G

PIN ASSIGNMENT

PIN #

SYMBOL

PIN #

SYMBOL

PIN #

SYMBOL

PIN #

SYMBOL

1NC

19

A1

37

CE455

A5

2NC

20

A8

38

CE3

56

A12

3

PD2

21

A2

39

A17

57

Vcc

4

PD3

22

A9

40

A16

58

A13

5

Vss

23

DQ13

41

OE

59

A6

6

PD0

24

DQ5

42

Vss

60

DQ21

7

PD1

25

DQ14

43

DQ25

61

DQ29

8

DQ1

26

DQ6

44

DQ17

62

DQ22

9

DQ9

27

DQ15

45

DQ26

63

DQ30

10

DQ2

28

DQ7

46

DQ18

64

DQ23

11

DQ10

29

DQ16

47

DQ27

65

DQ31

12

DQ3

30

DQ8

48

DQ19

66

DQ24

13

DQ11

31

Vss

49

DQ28

67

DQ32

14

DQ4

32

WE

50

DQ20

68

Vss

15

DQ12

33

A15

51

A3

69

A18

16

Vcc

34

A14

52

A10

70

A19

17

A0

35

CE253

A4

71

NC

18

A7

36

CE1

54

A11

72

NC

FUNCTIONAL DIAGRAM