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©

1999

MOS INTEGRATED CIRCUIT

4M-BIT CMOS STATIC RAM

256K-WORD BY 16-BIT

EXTENDED TEMPERATURE OPERATION

DATA SHEET

Document No. M14464EJ5V0DS00 (5th edition)

Date Published July 2001 NS CP (K)

Printed in Japan

The mark 5 shows major revised points.

Description

The

µPD444012A-X is a high speed, low power, 4,194,304 bits (262,144 words by 16 bits) CMOS static RAM.

The

µPD444012A-X has two chip enable pins (/CE1, CE2) to extend the capacity.

The

µPD444012A-X is packed in 48-pin PLASTIC TSOP (I) (Normal bent).

Features

• 262,144 words by 16 bits organization

• Fast access time: 50, 55, 70, 85, 100, 120 ns (MAX.)

• Byte data control: /LB (I/O1 - I/O8), /UB (I/O9 - I/O16)

• Low voltage operation

• Output Enable input for easy application

• Two Chip Enable inputs: /CE1, CE2

Part number

Access time

Operating supply

Operating ambient

Supply current

ns (MAX.)

Voltage

temperature

At operating

At standby

At data retention

V

°C

mA (MAX.)

50

2.7 to 3.6

−25 to +85

40

Note 2

73

45

Note 3

50

Note 4

70, 85, 100, 120

2.2 to 3.6

40

≥ 3.0 V

2. Cycle time

≥ 70 ns

3. Cycle time = 55 ns

4. Cycle time = 50 ns

5

5

5

5

5

5

5