Datasheet

5
0015P–EPROM–10/11
Atmel AT27C512R
Figure 5-1. AC waveforms for read operation
(1)
Notes: 1. Timing measurement reference level is 1.5V for -45 devices. Input AC drive levels are V
IL
= 0.0V and V
IH
= 3.0V. Timing
measurement reference levels for all other speed grades are V
OL
= 0.8V and V
OH
= 2.0V. Input AC drive levels are
V
IL
= 0.45V and V
IH
= 2.4V.
2.
OE/V
PP
may be delayed up to t
CE
- t
OE
after the falling edge of CE without impact on t
CE
.
3.
OE/V
PP
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
Figure 5-3. Output test load
t
R
, t
F
< 5ns (10% to 90%)
For -45 devices only:
t
R
, t
F
< 20ns (10% to 90%)
For -70 devices: