X28C512/X28C513
PIN DESCRIPTIONS
PIN NAMES
Symbol
A –A
Addresses (A –A )
Description
Address Inputs
Data Input/Output
Write Enable
Chip Enable
Output Enable
+5V
0
15
The Address inputs select an 8-bit memory location
during a read or write operation.
0
15
I/O –I/O
0
7
WE
CE
OE
Chip Enable (CE)
The Chip Enable input must be LOW to enable all read/
writeoperations.WhenCEisHIGH,powerconsumption
is reduced.
V
V
CC
SS
Ground
Output Enable (OE)
NC
No Connect
TheOutputEnableinputcontrolsthedataoutputbuffers
and is used to initiate read operations.
3856 PGM T01
Data In/Data Out (I/O –I/O )
0
7
Data is written to or read from the X28C512/513 through
the I/O pins.
Write Enable (WE)
The Write Enable input controls the writing of data to the
X28C512/513.
FUNCTIONAL DIAGRAM
512K-BIT
E PROM
ARRAY
X BUFFERS
LATCHES AND
DECODER
2
A –A
7 15
I/O BUFFERS
AND LATCHES
Y BUFFERS
LATCHES AND
DECODER
A –A
0 6
I/O –I/O
0
7
DATA INPUTS/OUTPUTS
CE
OE
CONTROL
LOGIC AND
TIMING
WE
V
CC
V
SS
3856 FHD F05
2
XICOR [ XICOR INC. ]
