AT27C512R-12 View Datasheet(PDF) - Atmel Corporation
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AT27C512R-12 Datasheet PDF : 9 Pages
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AC Waveforms for Read Operation (1)
AT27C512R
Notes: 1. Timing measurement reference level is 1.5V for -45 and
-55 devices. Input AC drive levels are VIL = 0.0V and
VIH = 3.0V. Timing measurement reference levels for
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 .
3. OE/VPP may be delayed up to tACC - tOE after the
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.
Input Test Waveforms and Measurement Levels
For -45 and -55 devices
only:
Output Test Load
For -70, -90, -12, -15,
and -20 devices:
tR, tF < 5 ns (10% to 90%)
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
Max
Units
Conditions
CIN
4
6
pF
VIN = 0V
COUT
8
12
pF
VOUT = 0V
Note: 1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested.
3-139
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