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Table 6-4.
AC Programming Characteristics
T A = 25 ? 5°C, V CC = 6.5 ? 0.25V, V PP = 13.0 ? 0.25V
Limits
Symbol
t AS
t OES
t DS
t AH
t DH
t DFP
t VPS
t VCS
t PW
t OE
t PRT
Parameter
Address Setup Time
OE Setup Time
Data Setup Time
Address Hold Time
Data Hold Time
OE High to Output Float Delay (2)
V pp Setup Time
V cc Setup Time
CE Program Pulse Width (3)
Data Valid from OE (2)
V PP Pulse Rise Time During
Programming
Test Conditions (1)
Input rise and fall times:
(10% to 90%) 20ns
Input pulse levels:
0.45V to 2.4V
Input timing reference level:
0.8V to 2.0V
Output timing reference level:
0.8V to 2.0V
Min
2
2
2
0
2
0
2
2
95
50
Max
130
105
150
Units
μ s
μ s
μ s
μ s
μ s
ns
μ s
μ s
μ s
ns
ns
Notes: 1.
2.
3.
Table 6-5.
V CC must be applied simultaneously with or before V PP and removed simultaneously with or after V PP .
This parameter is only sampled, and is not 100% tested. Output float is defined as the point where data is no
longer driven. See timing diagram.
Program pulse width tolerance is 100 μ s ?? 5%.
Atmel AT27C040 Integrated Product Identification Code
Pins
Codes
Manufacturer
Device Type
A 0
0
1
O 7
0
0
O 6
0
0
O 5
0
0
O 4
1
0
O 3
1
1
O 2
1
0
O 1
1
1
O 0
0
1
Hex Data
1E
0B
Atmel AT27C040 [DATASHEET]
0189J–EPROM–10/2012
7
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