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M27V256-100B6 PDF预览

M27V256-100B6

更新时间: 2024-10-27 19:43:59
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意法半导体 - STMICROELECTRONICS /
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M27V256-100B6 数据手册

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M27V256  
256 Kbit (32Kb x 8) Low Voltage UV EPROM and OTP EPROM  
LOW VOLTAGE READ OPERATION:  
3V to 3.6V  
FAST ACCESS TIME: 90ns  
LOW POWER CONSUMPTION:  
28  
– Active Current 10mA at 5MHz  
28  
– Standby Current 10µA  
1
1
PROGRAMMING VOLTAGE: 12.75V ± 0.25V  
FDIP28W (F)  
PDIP28 (B)  
PROGRAMMING TIME: 100µs/byte (typical)  
ELECTRONIC SIGNATURE  
– Manufacturer Code: 20h  
– Device Code: 8Dh  
DESCRIPTION  
The M27V256 is a low voltage 256 Kbit EPROM  
offered in the two ranges UV (ultra violet erase)  
and OTP (one time programmable). It is ideally  
suited for microprocessor systems and is orga-  
nized as 32,768 by 8 bits.  
PLCC32 (K)  
TSOP28 (N)  
8 x 13.4mm  
Figure 1. Logic Diagram  
The M27V256 operates in the read mode with a  
supply voltage as low as 3V. The decrease in op-  
erating power allows either a reduction of the size  
of the battery or an increase in the time between  
battery recharges.  
The FDIP28W (window ceramic frit-seal package)  
has a transparent lid which allows the user to ex-  
pose the chip to ultraviolet light to erase the bit pat-  
tern. A new pattern can then be written to the  
device by following the programming procedure.  
V
V
PP  
CC  
15  
8
A0-A14  
Q0-Q7  
Table 1. Signal Names  
E
M27V256  
A0-A14  
Q0-Q7  
E
Address Inputs  
Data Outputs  
Chip Enable  
Output Enable  
Program Supply  
Supply Voltage  
Ground  
G
G
V
SS  
V
V
V
PP  
CC  
SS  
AI01908  
May 1998  
1/15  

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