C9577
Low EMI Clock Generator/Buffers for Pentium® II Systems
Preliminary
MAXIMUM RATINGS
This device contains circuitry to protect the inputs
against damage due to high static voltages or electric
field; however, precautions should be taken to avoid
application of any voltage higher than the maximum
rated voltages to this circuit. For proper operation, Vin
and Vout should be constrained to the range:
VSS<(Vin or Vout)<VDD
Unused inputs must always be tied to an appropriate
logic voltage level (either VSS or VDD).
Voltage Relative to VSS:
Voltage Relative to VDD:
Storage Temperature:
Operating Temperature:
Maximum Power Supply:
-0.3V
0.3V
-65ºC to + 150ºC
-0ºC to +70ºC
5V
ELECTRICAL CHARACTERISTICS
Characteristic
Symbol
Min
Typ
Max
0.8
Units
Vdc
Conditions
Applicable to Pins 25,26,27,28,29,30,31
Input Low Voltage
VIL1
VIH1
IIL
-
-
-
Input High Voltage
2.0
-66
-
Vdc
µA
Input Low Current (@VIL = VSS)
Input High Current (@VIL = VDD)
Tri-State leakage Current
Dynamic Supply Current
Dynamic Supply Current
Static Supply Current
-5
Pull up
Pull up
IIH
5
µA
Ioz
-
-
-
-
-
-
-
-
10
µA
Idd3.3V
Idd2.5V
Isdd
TBD
TBD
TBD
mA
mA
µA
note 1
note 2
-
VDD = 3.3V ±5%, VDDC = VDDI = 2.5 + 5%, TA = 0ºC to +70ºC
SWITCHING CHARACTERISTICS
Characteristic
Symbol
Min
Typ
Max
Units
Conditions
Output Duty Cycle
-
45
50
55
%
Measured at 1.5V for 3.3V signals
Measured at 1.25V for 2.5 Volt signals
Skew (CPU-CPU)
Skew (PCI-PCI)
tSKEW1
-
-
-
-
-
-
175
500
pS
pS
pS
see note 3
see note 3
see note 4
tSKEW2
+250
∆Period Adjacent Cycles
∆P
VDD = 3.3V ±5%, VDDC = VDDI = 2.5 + 5%, TA = 0ºC to +70ºC
Note 1: Measures current consumption through all VDD pins supplied with 3.3V (VDD, VDDS). All outputs loaded as per table7 below.
Note 2: Measures current consumption through all VDD pins supplied with 2.5V (VDDC, VDDI). All outputs loaded as per table7 below.
Note 3: All outputs loaded as per table 7 below. Probes are placed on the pins and taken at 1.5V levels.
Note 4: This measurement is applicable with Spread Spectrum ON or OFF.
Output name
Max Load (in pF)
CPU(1:4), IOAPIC(1:2), REF3
PCI(_F,1:7)
48 MHz, REF(1:2)
20
30
15
Table 7.
INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.
MILPITAS, CA 95035 TEL: 408-263-6300 FAX 408-263-6571
Rev 1.5
4/22/1999
Page 6 of 10
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