HEF4720B |
Part Number | HEF4720B |
Manufacturer | NXP (https://www.nxp.com/) |
Description | The HEF4720B and HEF4720V are 256-bit, 1-bit per word random access memories with 3-state outputs. The memories are fully decoded and completely static. Recommended supply voltage range for HEF4720B i... |
Features |
power supply. The separate chip select input (CS) allows simple memory expansion when the outputs are wire-O Red. If CS is HIGH, the outputs are floating and no new information can be written into the memory. The signal at O has the same polarity as the data input D, while the signal at O is the complement of the signal at O. The write control W must be HIGH for writing into the memory.
Fig.1 Functional diagram.
HEF4720BP; HEF4720VP(N): 16-lead DIL; plastic (SOT38-1) HEF4720BD; HEF4720VD(F): 16-lead DIL; ceramic (cerdip) (SOT74) HEF4720BT; HEF4720VT(D): 16-lead SO; plastic (SOT109-1)
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Document |
HEF4720B Data Sheet
PDF 180.05KB |
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