Intel Pentium 4 Processor CK00 Clock Synthesizer/Driver Design Guidelines

CK00 Clock Synthesizer/Driver Design Guidelines
Page 19
Pull-Down
Voltage I (mA) I (mA) I (mA)
(V) min typ max
0000
0.4 9 13 27
0.65 14 21 41
0.85 17 26 52
1 202959
1.4253776
1.5263979
1.65 27 41 84
1.8284388
1.95 29 45 92
3.135 29 45 102
3.6 45 102
Type 3 Pull-Down
0
20
40
60
80
100
120
0 0.5 1 1.5 2 2.5 3 3.5 4
Vout
IOL
30
50
90
min
typ
max
Figure 3.2 TYPE 3: Pull-Down Characteristics
Notes
(Figure 3.2)
:
1. Must meet the temperature and voltage range specified in
2. Table 3.3 DC Operating Requirements
3. This drawing is not to scale. Comparisons should be made to the data provided in the table next this drawing.
3.2.2 TYPE 5: Buffer Characteristics
Table 3.6: Operating Requirements
Symbol Parameter Condition Min Typ Max Units Notes
I
ohmin
Pull-Up Current Vout = 1.0 V -33 mA 1
I
ohmax
Pull-Up Current V
out
= 3.135 V -33 mA 1
I
olmin
Pull-Down Current V
out
= 1.95 V 30 mA 1
I
olmax
Pull-Down Current V
out
= 0.4 V 38 mA 1
T
rh
3.3V Type 4 Output Rise
Edge Rate
3.3V
±
5%
@ 0.4V - 2.4 V
1/1 4/1 V/nS 2
T
fh
3.3V Type 4 Output Fall
Edge Rate
3.3V
±
5%
@ 2.4V - 0.4 V
1/1 4/1 V/nS 2
Notes:
1. Intended to approximate impedance curve below. Device should be checked against entire curve for characterization
testing. Production testing is expected to be a subset of characterization testing.
2. Output rise and fall time. See for calculation / measurement information.
3. Output rise and fall time must be guaranteed across VCC , process and temperature range.
4. Receiver logic thresholds are Vil=0.8 and Vih=2.0 Volts.
5. Ron 12-55 Ohm with a 30 Ohm nominal driver impedance.
6. Ron = Vout/Ioh, Vout/Iol measured at VCC/2.
7. See PCI specification for additional PCI details.