Datasheet

5
Atmel AT27C040 [DATASHEET]
0189J–EPROM–10/2012
Figure 6-1. AC Waveforms for Read Operation
(1)
Notes: 1. Timing measurement references are 0.8V and 2.0V. Input AC drive levels are 0.45V and 2.4V, unless
otherwise specified.
2.
OE may be delayed up to t
CE
– t
OE
after the falling edge of CE without impact on t
CE
.
3.
OE may be delayed up to t
ACC
– t
OE
after the address is valid without impact on t
ACC
.
4. This parameter is only sampled, and is not 100% tested.
5. Output float is defined as the point when data is no longer driven.
Figure 6-2. Input Test Waveforms and Measurement Levels
Figure 6-3. Output Test Load
Table 6-2. Pin Capacitance
Note: 1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested.
f = 1MHz, T = 25
°C
(1)
Symbol Typ Max Units Conditions
C
IN
4 8 pF V
IN
= 0V
C
OUT
8 12 pF V
OUT
= 0V
A
ddress
Address Valid
Output
t
CE
t
OE
t
ACC
High Z
t
DF
t
OH
Output
Valid
CE
OE
AC
Driving
Levels
AC
Measurement
Level
2.40V
0.45V
2.00
0.80
OUTPUT
PIN
1.3V
(1N914)
3.3K
CL