AT27C512R
AC Waveforms for Read Operation (1)
Notes: 1. Timing measurement reference level is 1.5V for -45 and 3. OE/VPP may be delayed up to tACC - tOE after the
-55 devices. Input AC drive levels are VIL = 0.0V and
VIH = 3.0V. Timing measurement reference levels for
address is valid without impact on tACC.
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.
all other speed grades are VOL = 0.8V and VOH
=
2.0V. Input AC drive levels are VIL = 0.45V and VIH
2.4V.
=
2. OE/VPP may be delayed up to tCE - tOE after the falling
edge of CE without impact on tCE
.
Input Test Waveforms and Measurement Levels
Output Test Load
For -45 and -55 devices
only:
tR, tF < 5 ns (10% to 90%)
For -70, -90, -12, -15,
and -20 devices:
Note: CL = 100 pF including jig capaci-
tance, except for the -45 and -55
devices, where CL = 30 pF.
tR, tF < 20 ns (10% to 90%)
Pin Capacitance (f = 1 MHz T = 25°C) (1)
Typ
4
Max
6
Units
pF
Conditions
C
C
V
V
= 0V
IN
IN
8
12
pF
= 0V
OUT
OUT
Note: 1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested.
3-139
ATMEL [ ATMEL ]
