MM74C910
MM54C910 MM74C910 256 Bit TRI-STATE Random Access Read Write Memory
September 1989
MM54C910 MM74C910 256 Bit TRI-STATE...
Description
MM54C910 MM74C910 256 Bit TRI-STATE Random Access Read Write Memory
September 1989
MM54C910 MM74C910 256 Bit TRI-STATE Random Access Read Write Memory
General Description
The MM54C910 MM74C910 is a 64 word by 4-bit random access memory Inputs consist of six address lines four data input lines a WE and a ME line The six address lines are internally decoded to select one of the 64 word locations An internal address register latches the address information on the positive to negative transition of ME The TRI-STATE outputs allow for easy memory expansion
Address Operation Address inputs must be stable (tSA) prior to the positive to negative transition of ME and (tHA) after the positive to negative transition of ME The address register holds the information and stable address inputs are not needed at any other time
Write Operation Data is written into memory at the selected address if WE goes low while ME is low WE must be held low for tWE and data must remain stable tHD after WE returns high
Read Operation Data is nondestructively read from a memory location by an address operation with WE held high
Outputs are in the TRI-STATE (Hi-Z) condition when the device is writing or disabled
Features
Y Supply voltage range Y High noise immunity Y TTL compatible fan out Y Input address register Y Low power consumption
Y Fast access time Y TRI-STATE outputs Y High voltage inputs
3 0V to 5 5V 0 45VCC (typ )
1 TTL load
250 nW package (typ ) (chip enabled or disabled)
250 ns (typ ) at 5 ...
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