7
AT27C040
0189F–EPROM–4/03
Notes: 1. V
CC
must be applied simultaneously or before V
PP
and removed simultaneously 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 100 µsec ± 5%.
AC Programming Characteristics
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%) 20 ns
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
Atmel’s AT27C040 Integrated Product Identification Code
Codes
Pins
Hex DataA0 O7 O6 O5 O4 O3 O2 O1 O0
Manufacturer 000011110 1E
Device Type 100001011 0B
