Terminology and guidelines
3.4.1 Example
This is an example of an operating rating:
Symbol
Description
Min.
Max.
Unit
VDD
1.0 V core supply
voltage
–0.3
1.2
V
3.5 Result of exceeding a rating
40
30
The likelihood of permanent chip failure increases rapidly as
soon as a characteristic begins to exceed one of its operating ratings.
20
10
0
Operating rating
Measured characteristic
3.6 Relationship between ratings and operating requirements
Fatal
range
Limited
operating
range
Normal
operating
range
Limited
operating
range
Fatal
range
- Probable permanent failure
- No permanent failure
- Possible decreased life
- Possible incorrect operation
- No permanent failure
- Correct operation
- No permanent failure
- Possible decreased life
- Possible incorrect operation
- Probable permanent failure
Handling range
- No permanent failure
–∞
∞
3.7 Guidelines for ratings and operating requirements
Follow these guidelines for ratings and operating requirements:
• Never exceed any of the chip’s ratings.
MCF51JU128 Data Sheet, Rev. 4, 01/2012.
6
Freescale Semiconductor, Inc.
FREESCALE [ Freescale ]
