TC55VCM208ASTN40,55

2003-08-11

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TOSHIBA MOS DIGITAL INTEGRATED CIRCUIT SILICON GATE CMOS

524,288-WORD BY 8-BIT FULL CMOS STATIC RAM

DESCRIPTION

The TC55VCM208ASTN is a 4,194,304-bit static random access memory (SRAM) organized as 524,288 words by

8 bits. Fabricated using Toshiba's CMOS Silicon gate process technology, this device operates from a single 2.3 to

3.6 V power supply. Advanced circuit technology provides both high speed and low power at an operating current of

3 mA/MHz and a minimum cycle time of 40 ns. It is automatically placed in low-power mode at 0.7

µA standby

= 3 V, Ta = 25°C, typical) when chip enable ( CE1 ) is asserted high or (CE2) is asserted low. There

are three control inputs. CE1 and CE2 are used to select the device and for data retention control, and output

enable ( OE ) provides fast memory access. This device is well suited to various microprocessor system applications

where high speed, low power and battery backup are required. And, with a guaranteed operating extreme

temperature range of

−40° to 85°C, the TC55VCM208ASTN can be used in environments exhibiting extreme

temperature conditions. The TC55VCM208ASTN is available in a plastic 40-pin thin-small outline package

(TSOP).

FEATURES

• Low-power dissipation

Operating: 9 mW/MHz (typical)

• Single power supply voltage of 2.3 to 3.6 V

• Power down features using CE1 and CE2

• Data retention supply voltage of 1.5 to 3.6 V

• Direct TTL compatibility for all inputs and outputs

• Wide operating temperature range of −40° to 85°C

• Standby Current (maximum):

3.6 V

10

µA

3.0 V

5

µA

PIN NAMES

40 PIN TSOP

A0~A18

Address Inputs

1

CE , CE2

Chip Enable

R/W

Read/Write Control

OE

Output Enable

LB , UB

Data Byte Control

I/O1~I/O16

Data Inputs/Outputs

Power

GND

Ground

NC

No Connection

OP*

Option

*: OP pin must be open or connected to GND.

Pin No.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

Pin Name

A16

A15

A14

A13

A12

A11

A9

A8

R/W

CE2

OP

NC

A18

A7

A6

A5

A4

A3

A2

A1

Pin No.

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

Pin Name

A0

CE1

GND

OE

I/O1

I/O2

I/O3

I/O4

NC

I/O6

I/O7

I/O8

A10

NC

NC

GND

A17

• Access Times:

TC55VCM208ASTN

40

55

Access Time

40 ns

55 ns

1

CE

Access Time

40 ns

55 ns

CE2

Access Time

40 ns

55 ns

OE

Access Time

25 ns

30 ns

• Package:

TSOPⅠ40-P-1014-0.50

(Weight:0.30 g typ)

(Normal)

21

40

20

1