TC55NEM208AFPV/AFTV55,70

2002-10-31

1/11

TENTATIVE

TOSHIBA MOS DIGITAL INTEGRATED CIRCUIT SILICON GATE CMOS

524,288-WORD BY 8-BIT STATIC RAM

DESCRIPTION

The TC55NEM208AFPV/AFTV 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 2.7 to 5.5 V power supply. Advanced circuit technology provides both high speed and low power at an

operating current of 3 mA/MHz (typ) and a minimum cycle time of 55 ns. It is automatically placed in low-power

mode at 1

µA 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. 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 range of

−40° to 85°C, the TC55NEM208AFPV/AFTV can

be used in environments exhibiting extreme temperature conditions. The TC55NEM208AFPV/AFTV is available in

a standard plastic 32-pin small-outline package (SOP) and normal and reverse pinout plastic 32-pin

thin-small-outline package (TSOP).

FEATURES

• Low-power dissipation

Operating: 15 mW/MHz (typical)

• Single power supply voltage of 2.7 to 5.5 V

• Power down features using CE .

• Data retention supply voltage of 2.0 to 5.5 V

• Direct TTL compatibility for all inputs and outputs

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

• Standby Current (maximum):20 µA

PIN NAMES

A0~A18

Address Inputs

R/W

Read/Write Control

OE

Output Enable

CE

Chip Enable

I/O1~I/O8

Data Inputs/Outputs

Power

GND

Ground

• Access Times (maximum):

TC55NEM208AFPV/AFTV

55

70

Access Time

55 ns

70 ns

CE Access Time

55 ns

70 ns

OE Access Time

30 ns

35 ns

• Package:

SOP32-P-525-1.27 (AFPV)

(Weight:

g typ)

TSOP II32-P-400-1.27 (AFTV) (Weight:

g typ)

1

32

2

31

3

30

4

29

5

28

6

27

7

26

8

25

9

24

10

23

11

22

12

21

13

20

14

19

15

18

16

17

A15

A17

R/W

A13

A8

A9

A11

A10

I/O8

I/O7

I/O6

I/O5

I/O4

A18

A16

A14

A12

A7

A6

A5

A4

A3

A2

A1

A0

I/O1

I/O2

I/O3

GND

CE

OE

(AFPV/AFTV)