X28HT512 Datasheet, PDF (2/13 Pages) Xicor Inc. – High Temperature, 5 Volt, Byte Alterable E2PROM

X28HT512
PIN DESCRIPTIONS
Addresses (A₀–A₁₅)
The Address inputs select an 8-bit memory location
during a read or write operation.
Chip Enable (CE)
The Chip Enable input must be LOW to enable all read/
write operations. When CE is HIGH, power consumption
is reduced.
Output Enable (OE)
The Output Enable input controls the data output buffers
and is used to initiate read operations.
Data In/Data Out (I/O₀–I/O₇)
Data is written to or read from the X28HT512 through the
I/O pins.
Back Bias Voltage (V_BB)
It is required to provide -3V on pin 1. This negative
voltage improves higher temperature functionality.
Write Enable (WE)
The Write Enable input controls the writing of data to the
X28HT512.
PIN NAMES
Symbol
A₀–A₁₅
I/O₀–I/O₇
WE
CE
OE
V_BB
V_CC
V_SS
NC
Description
Address Inputs
Data Input/Output
Write Enable
Chip Enable
Output Enable
–3V
+5V
Ground
No Connect
6614 PGM T01
FUNCTIONAL DIAGRAM
A7–A15
X BUFFERS
LATCHES AND
DECODER
512K-BIT
E2PROM
ARRAY
A0–A6
Y BUFFERS
LATCHES AND
DECODER
CE
OE
WE
VCC
VSS
VBB
CONTROL
LOGIC AND
TIMING
I/O BUFFERS
AND LATCHES
I/O0–I/O7
DATA INPUTS/OUTPUTS
6614 FHD F01
2