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) (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
(B version: VCC = 2.7 to 3.6 V, C version: VCC = 2.2 to 3.6 V)
• Low VCC data retention: 1.0 V (MIN.)
• 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
temperature
At operating
At standby
At data retention
V
°C
mA (MAX.)
μA (MAX.)
μA (MAX.)
7
3
μPD444012A-CxxX
, 55, 70, 85, 100
70, 85, 100, 120
2.7 to 3.6
−25 to +85
2.2 to 3.6
40
Note 3
50
50
Note 2
45
μPD444012A-BxxX
Note 1
Supply current
Note 4
40
Notes 1. VCC ≥ 3.0 V
2. Cycle time ≥ 70 ns
3. Cycle time = 55 ns
4. Cycle time = 50 ns
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 products and/or types are available in every country. Please check with an NEC Electronics
sales representative for availability and additional information.
Document No. M14464EJ7V0DS00 (7th edition)
Date Published September 2006 NS CP (K)
Printed in Japan
The mark shows major revised points.
The revised points can be easily searched by copying an "" in the PDF file and specifying it in the "Find what:" field.
1999
