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w
823719
A.C. CHARACTERISTICS-PERIPHERAL (SLAVE) MODE
TA
= QC
to
70'C, TCASE
=
QC
to
75%.
Vcc
=
+5V *5%, GND
=
OV
NOTES
1. DREO and DACK signals may be active high or active low. Timing diagrams assume the active high mode.
2
3: The net * o r
Pulse width for normal write will be TCY
-
100 ns and for extended write will be 2TCY
-
100 ns.
The net
4. T W is specified for
two
different output HIGH levels. T W 1 is measured at 2.0V. T W 2 is measured at 3.3V. The value
for T W 2 assumes an external 3.3 Kfk pull-up resistor connected from HRO to V a .
5. Output Loading on the Data Bus is 1 TTL Gate plus 100 pF capacitance.
is an
n collector output. This parameter assumes the presence of a 2.2K pullup to V m .
or
hAEMR
pulse width for normal read will be 2TCY -50 ns and for compressed read will be TCY -50 ns.
A.C. TESTING INPUT/OUTPUT WAVEFORM
I
I
2.0
2.0
2.4
231466-12
A.C. Testing: Inputs are
driven
at 2.4V for a Logk "1"
and
0.45V
for
a Logic "0." Timing measurements
are made
at 2.0V
for
a
Logic "1"
and
0.W for a Logic "0." lnpul timing parameters
a s .
s u m transition
times
of 20 ns or less. Waveform measurement
points for both input and
wtput !4gnals
are
2.0V
for
HIGH and
0.8V for LOW, unless othemise noted.
2-247
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