PRELIMINARY DATA SHEET
MOS INTEGRATED CIRCUIT
µPD444012A-X
4M-BIT CMOS STATIC RAM
256K-WORD BY 16-BIT
EXTENDED TEMPERATURE OPERATION
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).
Features
• 262,144 words by 16 bits organization
• Fast access time: 55, 70, 85, 100, 120, 150 ns (MAX.)
• Byte data control: /LB (I/O1 - I/O8), /UB (I/O9 - I/O16)
• Low voltage operation
(B version: VCC = 2.7 to 3.6 V, C version: VCC = 2.2 to 3.6 V, D version: VCC = 1.8 to 3.6 V)
• Operating ambient temperature: TA = –25 to +85 °C
• Output Enable input for easy application
• Two Chip Enable inputs: /CE1, CE2
Part number
Access time
Operating supply Operating ambient
ns (MAX.)
Voltage
V
temperature
°C
55, 70, 85, 100
2.7 to 3.6
−25 to +85
µPD444012A-CxxX 70, 85, 100, 120
2.2 to 3.6
µPD444012A-DxxX
Supply current
1.8 to 3.6
µPD444012A-BxxX
100, 120, 150
At operating
mA (MAX.)
40
Note
At standby
µA (MAX.)
At data retention
µA (MAX.)
7
TBD
40
Note Cycle time ≥ 70 ns. µPD444012A-B55X : TBD
The information in this document is subject to change without notice. Before using this document, please
confirm that this is the latest version.
Not all devices/types available in every country. Please check with local NEC representative for
availability and additional information.
Document No. M14464EJ1V0DS00 (1st edition)
Date Published September 1999 NS CP (K)
Printed in Japan
The mark 5 shows major revised points.
©
1999