DATA SHEET
MOS INTEGRATED CIRCUIT
μ PD431000A-X
1M-BIT CMOS STATIC RAM
128K-WORD BY 8-BIT
EXTENDED TEMPERATURE OPERATION
Description
The μPD431000A-X is a high speed, low power, and 1,048,576 bits (131,072 words by 8 bits) CMOS static RAM.
The μPD431000A-X has two chip enable pins (/CE1, CE2) to extend the capacity. And battery backup is available.
In addition to this, A and B versions are low voltage operations.
The μPD431000A-X is packed in 32-pin PLASTIC SOP, 32-pin PLASTIC TSOP (I) (8 × 13.4 mm) and (8 × 20 mm).
Features
• 131,072 words by 8 bits organization
• Fast access time: 70, 85, 100, 120, 150 ns (MAX.)
• Low voltage operation (A version: VCC = 3.0 to 5.5 V, B version: VCC = 2.7 to 5.5 V)
• Operating ambient temperature: TA = –25 to +85 °C
• Low VCC data retention: 2.0 V (MIN.)
• Output Enable input for easy application
• Two Chip Enable inputs: /CE1, CE2
Part number
Access time
ns (MAX.)
Operating supply Operating ambient
Supply current
70, 85
μPD431000A-AxxX
Note2
μPD431000A-BxxX
Note2
At operating
At standby
At data retention
°C
mA (MAX.)
μA (MAX.)
μA (MAX.) Note1
4.5 to 5.5
–25 to +85
70
50
2.5
, 100
3.0 to 5.5
35
Note3
, 100, 120, 150
2.7 to 5.5
30
Note4
70
70
temperature
V
μPD431000A-xxX
voltage
26
Note5
22
Note6
Notes 1. TA ≤ 40 °C
2. VCC = 4.5 to 5.5 V
3. 70 mA (VCC > 3.6 V)
4. 70 mA (VCC > 3.3 V)
5. 50 μA (VCC > 3.6 V)
6. 50 μA (VCC > 3.3 V)
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. M10430EJBV0DS00 (11th edition)
Date Published November 2008
Printed in Japan
1995
