M27C405
(1)
Table 2. Absolute Maximum Ratings
Symbol
Parameter
Value
Unit
°C
°C
°C
V
(3)
T
A
–40 to 125
–50 to 125
–65 to 150
–2 to 7
Ambient Operating Temperature
T
Temperature Under Bias
BIAS
T
STG
Storage Temperature
(2)
Input or Output Voltage (except A9)
V
IO
V
Supply Voltage
–2 to 7
–2 to 13.5
–2 to 14
V
V
V
CC
(2)
A9 Voltage
V
A9
V
Program Supply Voltage
PP
Note: 1. Except for the rating "Operating Temperature Range", stresses above those listed in the Table "Absolute Maximum Ratings" may
cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions
above those indicated in the Operating sections of this specification is not implied. Exposure to Absolute Maximum Rating condi-
tions for extended periods may affect device reliability. Refer also to the STMicroelectronics SURE Program and other relevant qual-
ity documents.
2. Minimum DC voltage on Input or Output is –0.5V with possible undershoot to –2.0V for a period less than 20ns. Maximum DC
voltage on Output is V
3. Depends on range.
+0.5V with possible overshoot to V +2V for a period less than 20ns.
CC
CC
Table 3. Operating Modes
Mode
V
E
G
A9
X
Q7-Q0
Data Out
Hi-Z
PP
V
V
V
V
or V
Read
IL
IL
IL
IH
IH
CC
SS
SS
V
V
V
or V
Output Disable
Program
X
CC
V
IL
Pulse
V
X
Data In
Data Out
Hi-Z
PP
PP
PP
V
V
V
V
Verify
X
IH
IH
IH
IL
V
V
V
Program Inhibit
Standby
X
IH
V
or V
SS
X
X
Hi-Z
CC
V
V
IL
V
ID
V
CC
Electronic Signature
Codes
IL
Note: X = V or V , V = 12V ± 0.5V.
IH IL ID
Table 4. Electronic Signature
Identifier
Manufacturer’s Code
Device Code
A0
Q7
0
Q6
0
Q5
Q4
0
Q3
0
Q2
0
Q1
Q0
0
Hex Data
20h
V
IL
1
1
0
0
V
1
0
1
0
1
0
B4h
IH
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