M87C257-10C1TR STMICROELECTRONICS [STMicroelectronics], M87C257-10C1TR Datasheet - Page 9

• Manufacturer Part Number: M87C257-10C1TR
• Description: Address Latched 256 Kbit (32Kb x8) UV EPROM and OTP EPROM
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

M87C257
2.7
2.8
Figure 4.
Program Inhibit
Programming of multiple M87C257s in parallel with different data is also easily
accomplished. Except for E, all like inputs including G of the parallel M87C257 may be
common. A TTL low level pulse applied to a M87C257's E input, with V
program that M87C257. A high level E input inhibits the other M87C257s from being
programmed.
Program Verify
A verify (read) should be performed on the programmed bits to determine that they were
correctly programmed. The verify is accomplished with G at V
V
CC
at 6.25V.
Programming flowchart
YES
NO
FAIL
= 25
++n
V CC = 6.25V, V PP = 12.75V
CHECK ALL BYTES
NO
2nd: V CC = 4.2V
E = 100 s Pulse
1st: V CC = 6V
VERIFY
n = 0
Addr
Last
YES
YES
NO
++ Addr
AI00760B
IL
, E at V
IH
PP
, V
Device operation
at 12.75V, will
PP
at 12.75V and
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