UD61464DC, UD61464DC08, UD61466 Selling Leads, Datasheet
MFG:NEC Package Cooled:DIP D/C:94+
UD61464DC, UD61464DC08, UD61466 Datasheet download
Part Number: UD61464DC
MFG: NEC
Package Cooled: DIP
D/C: 94+
UD61464DC, UD61464DC08, UD61466
- Table of contents:
Info of UD61464DC
Info of UD61464DC08
Info of UD61466
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About UD61464DC07
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Datasheet: UD61464DC07
File Size: 179441 KB
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About UD61464DC08
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Datasheet: UD61464DC08
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About UD61466DC07
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Datasheet: UD61466DC07
File Size: 184206 KB
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UD61466 General Description
The UD61466 is a dynamic random access memory organized 65536 words by 4 bits.
SCM facilitates faster data operation with predefined row address. Via 8 address inputs the 16 address bits are transmitted into the internal address memories in a time-multiplex operation. The falling RASedge takes over the row address. After the row address hold time the column address can be applied. During the Read cycle the address transfer is not latched by the falling edge at the CAS input, so that the column address must be applied until the data are valid at the output. During Write the column address is taken over with the falling edge of the control signal CAS, or W, that becomes active as the last. The selection of one or more memory circuits can be made via the RAS input.
UD61466 Maximum Ratings
| Absolute Maximum Ratings |
Symbol |
Min. |
Max. |
Unit |
| Power Supply Voltage Input Voltage 1) Output Voltage 1) Output Current 1a) Power Dissipation Operating Temperature Storage Temperature |
VCC VI VO IO PD Ta Tstg |
-0.5 -1.0 -1.0 -50 0 -55 |
7.0 7.0 7.0 50 1 70 125 |
V V V mA W °C °C |
UD61466 Features
· Dynamic random access memory 65536 x 4 bits manufactured using a CMOS technology
· RAS access times 70 ns/80 ns
· TTL-compatible
· Three-state outputs bidirectional
· 256 refresh cycles 4 ms refresh cycle time
· STATIC COLUMN MODE
· Operating modes: Read, Write, Read - Write, RAS only Refresh, Hidden Refresh with address transfer
· Low power dissipation
· Power supply voltage 5 V
· Package PDIP18 (300 mil)
· Operating temperature range 0 to 70 °C
· Quality assessment according to CECC 90000, CECC 90100 and CECC 90112
· RAS access times 70 ns/80 ns
· TTL-compatible
· Three-state outputs bidirectional
· 256 refresh cycles 4 ms refresh cycle time
· STATIC COLUMN MODE
· Operating modes: Read, Write, Read - Write, RAS only Refresh, Hidden Refresh with address transfer
· Low power dissipation
· Power supply voltage 5 V
· Package PDIP18 (300 mil)
· Operating temperature range 0 to 70 °C
· Quality assessment according to CECC 90000, CECC 90100 and CECC 90112
UD61466 Connection Diagram
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