UPD442000A-X Datasheet, PDF (1/28 Pages) NEC – 2M-BIT CMOS STATIC RAM 256K-WORD BY 8-BIT EXTENDED TEMPERATURE OPERATION

DATA SHEET
MOS INTEGRATED CIRCUIT
µPD442000A-X
2M-BIT CMOS STATIC RAM
256K-WORD BY 8-BIT
EXTENDED TEMPERATURE OPERATION
Description
The µPD442000A-X is a high speed, low power, 2,097,152 bits (262,144 words by 8 bits) CMOS static RAM.
The µPD442000A-X has two chip enable pins (/CE1, CE2) to extend the capacity. And battery backup is available.
The µPD442000A-X is packed in 32-pin PLASTIC TSOP (I) (Normal bent) and 32-pin PLASTIC TSOP (I) (Reverse
bent).
Features
• 262,144 words by 8 bits organization
• Fast access time : 55, 70, 85, 100, 120 ns (MAX.)
• Low voltage operation : VCC = 2.7 to 3.6 V (-BB55X, -BB70X, -BB85X)
VCC = 2.2 to 3.6 V (-BC70X, -BC85X, -BC10X)
VCC = 1.8 to 2.2 V (-DD85X, -DD10X, -DD12X)
• 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
µPD442000A
-BB55X, -BB70X, -BB85X
-BC70X, -BC85X, -BC10X
-DD85X, -DD10X, -DD12X
Access time Operating supply Operating ambient
Supply current
ns (MAX.)
voltage
temperature At operating At standby At data retention
55, 70, 85
V
2.7 to 3.6
°C
−25 to +85
mA (MAX.)
30 ^Note
µA (MAX.)
2
µA (MAX.)
1
70, 85, 100
2.2 to 3.6
30
85, 100, 120
1.8 to 2.2
15
1.5
Note Cycle time ≥ 70 ns, -BB55X : 35 mA
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. M14669EJ7V0DS00 (7th edition)
The mark 5 shows major revised points.
Date Published October 2002 NS CP (K)
Printed in Japan
©
2000