OUTPUT LOAD
INPUT
WAVEFORM
OUTPUT
BUFFER
TEST POINT
UNLOADED RISE AND FALL TIME MEASUREMENT
2.1
0.3
2.1
0.3
OUTPUT
WAVEFORM
2.1
0.3
tr
NOTES:
1. Input waveform has a slew rate of 1 V/ns.
2. Rise time is measured from 0.3 to 2.1 V unloaded.
3. Fall time is measured from 2.1 to 0.3 V unloaded.
2.1
0.3
tf
Figure 3. Unloaded Rise and Fall Time Characterization
VOLTAGE (V)
– 0.5
0
0.8
1.25
1.5
2.3
2.7
2.9
3.4
3.6
PULL–UP
I (mA) MIN
– 38
– 38
– 38
– 26
– 20
0
0
0
0
0
I (mA) MAX
– 105
– 105
– 105
– 83
– 70
– 30
– 10
0
0
0
3.6
2.9
2.5
2.3
2.1
1.25
0.8
0
0
(a) Pull–Up
50 Ω LOAD
TEST POINT
– 38
CURRENT (mA)
– 105
VOLTAGE (V)
– 0.5
0
0.4
0.8
1.25
1.6
2.8
3.2
3.4
3.6
PULL–DOWN
I (mA) MIN
0
0
10
20
31
40
40
40
40
46
I (mA) MAX
0
0
20
40
63
80
80
80
80
120
VDD
1.6
1.25
0.3
0
0
(b) Pull–Down
Figure 4. Output Buffer Characteristics
TEST POINT
50 Ω LOAD
40
80
CURRENT (mA)
MOTOROLA FAST SRAM
MCM72F8•MCM72F9
9