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Electrical and Thermal Characteristics
MOTOROLA
M68060 USERÕS MANUAL
12-3
12.5 CLOCK INPUT SPECIFICATIONS (V
CC
= 3.3 V
±
5%)
NOTES:
1.Specification value at maximum frequency of operation.
2.Minimum frequency is periodically sampled and not 100% tested.
3.CLK may be stopped LOW to conserve power.
Num Characteristic 50 MHz 66 MHz 75 MHz Unit
Min Max Min Max Min Max
Frequency of Operation 0
2
50 0
2
66.67 0
2
75 MHz
1 CLK Cycle Time 20 Ñ 15 Ñ 13.3 Ñ nS
2 CLK Rise Time Ñ2Ñ2Ñ2nS
3 CLK Fall Time Ñ2Ñ2Ñ2nS
4 CLK Duty Cycle Measured at 1.5 V 45 55 45 55 45 55 %
4a
1
CLK Pulse Width High Measured at 1.5 V 9 11 6.75 8.25 6.0 7.3 nS
4b
1
CLK Pulse Width Low Measured at 1.5 V 9 11 6.75 8.25 6.0 7.3 nS
55 CLKEN Input Setup 8Ñ7Ñ5.5ÑnS
56 CLKEN Input Hold 2Ñ2Ñ2ÑnS
Figure 12-1. Clock Input Timing Diagram
CLK
CLKEN
BCLK
56
55
56
55
4a 4b
1
VMVLVH
23
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