Datasheet

5
0570H–EPROM–4/11
Atmel AT27C020
Figure 5-1. 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 5-2. Input test waveforms and measurement levels
For -55 devices only:
t
R
, t
F
< 5ns (10% to 90%)
For -90 devices only:
t
R
, t
F
< 20ns (10% to 90%)
Figure 5-3. Output test load
Note: CL = 100pF including jig capacitance, except -55 devices, where CL = 30pF
0.0V
3.0V
1.5V
AC
DRIVING
LEVELS
AC
MEASUREMENT
LEVEL