27C256T
256K (32K x 8-Bit) OTP EPROM
FIGURE 5. BYTE PROGRAMMING TIMING WAVEFORM
DEVICE IDENTIFIER MODE DESCRIPTION
The Device Identifier Mode allows binary codes to be read from the outputs that identify the manufacturer and the type
of device. Using this mode with programming equipment, the device will automatically match its own erase and pro-
gramming algorithm.
27C256T SERIES IDENTIFIER CODE
IDENTIFIER
A
I/O7
0
I/O6
I/O5
I/O4
I/O3
I/O2
1
I/O1
1
I/O0
1
HEX DATA
0
MANUFACTURER CODE
DEVICE CODE
V
0
0
0
0
07
38
IL
V
0
0
1
1
1
0
0
0
IH
1. VCC = 5.0V + 10%.
2. A = 12.0V + 0.5V.
9
3. A -A , A -A , CE, OE = V , PGM = V .
1
8
10 14
IL
IH
4. X = Don’t care.
06.24.03 REV 4
All data sheets are subject to change without notice 11
©2003 Maxwell Technologies
All rights reserved.
MAXWELL [ MAXWELL TECHNOLOGIES ]
