TC554161AFTI-70,-85,-10,-70L,-85L,-10L

2001-08-17

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TOSHIBA MOS DIGITAL INTEGRATED CIRCUIT SILICON GATE CMOS



262,144-WORD BY 16-BIT STATIC RAM

DESCRIPTION

The TC554161AFTI is a 4,194,304-bit static random access memory (SRAM) organized as 262,144 words by

16bits. Fabricated using Toshiba's CMOS Silicon gate process technology, this device operates from a single 5V ±

10% power supply. Advanced circuit technology provides both high speed and low power at an operating current of

10 mA/MHz (typ) and a minimum cycle time of 70 ns. It is automatically placed in low-power mode at 2 mA standby

current (typ) when chip enable ( CE ) is asserted high. There are two control inputs. CE is used to select the device

and for data retention control, and output enable ( OE ) provides fast memory access. Data byte control pin ( LB ,

UB

) provides lower and upper byte 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 TC554161AFTI can be used in environments exhibiting extreme

temperature conditions. The TC554161AFTI is available in a plastic 54-pin thin -small-outline package (TSOP).

FEATURES

· Low-power dissipation

Operating: 55 mW/MHz (typical)

· Single power supply voltage of 5 V ± 10%

· Power down features using CE .

· Data retention supply voltage of 2 to 5.5 V

· Direct TTL compatibility for all inputs and outputs

· Wide operating temperature range of -40° to 85°C

· Standby Current (maximum):

TC554161AFTI

-70,-85,-10

-70L,-85L,-10L

5.5 V

200

mA

100

mA

3.0 V

100

mA

50

mA

PIN NAMES

A0~A17

Address Inputs

I/O1~I/O16

Data Inputs/Outputs

CE

Chip Enable

R/W

Read/Write Control

OE

Output Enable

LB

Data Byte Control

Power (

+5 V)

GND

Ground

NC

No Connection

OP*

Option

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

· Access Times (maximum):

TC554161AFTI

-70,-70L

-85,-85L

-10,-10L

Access Time

70 ns

85 ns

100 ns

CE

Access Time

70 ns

85 ns

100 ns

OE

Access Time

35 ns

45 ns

50 ns

· Package:

TSOP II54-P-400-0.80 (AFTI) (Weight: 0.57 g typ)

NC

A3

A2

A1

A0

I/O16

I/O15

GND

I/O14

I/O13

OP

R/W

I/O12

I/O11

GND

I/O10

I/O9

NC

A17

A16

A15

A14

A13

A4

A5

A6

A7

NC

I/O1

I/O2

GND

I/O3

I/O4

OP

NC

I/O5

I/O6

GND

I/O7

I/O8

A8

A9

A10

A11

A12

NC

1

54

2

53

3

52

4

51

5

50

6

49

7

48

8

47

9

46

10

45

11

44

12

43

13

42

14

41

15

40

16

39

17

38

18

37

19

36

20

35

21

34

22

33

23

32

24

31

25

30

26

29

27

28

CE

OE

UB

LB

(Normal pinout)