Datasheet

7
Atmel AT27C040 [DATASHEET]
0189J–EPROM–10/2012
Table 6-4. AC Programming Characteristics
Notes: 1. V
CC
must be applied simultaneously with or before V
PP
and removed simultaneously with or after V
PP
.
2. 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.
3. Program pulse width tolerance is 100μs 5%.
Table 6-5. Atmel AT27C040 Integrated Product Identification Code
T
A
= 25  5°C, V
CC
= 6.5  0.25V, V
PP
= 13.0  0.25V
Symbol Parameter Test Conditions
(1)
Limits
UnitsMin Max
t
AS
Address Setup Time
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
2 μs
t
OES
OE Setup Time 2 μs
t
DS
Data Setup Time 2 μs
t
AH
Address Hold Time 0 μs
t
DH
Data Hold Time 2 μs
t
DFP
OE High to Output Float Delay
(2)
0 130 ns
t
VPS
V
pp
Setup Time 2 μs
t
VCS
V
cc
Setup Time 2 μs
t
PW
CE Program Pulse Width
(3)
95 105 μs
t
OE
Data Valid from OE
(2)
150 ns
t
PRT
V
PP
Pulse Rise Time During
Programming
50 ns
Codes
Pins
Hex DataA
0
O
7
O
6
O
5
O
4
O
3
O
2
O
1
O
0
Manufacturer 0 0 0 0 1 1 1 1 0 1E
Device Type 1 0 0 0 0 1 0 1 1 0B