MMC2107 - Freescale Semiconductor

Freescale Semiconductor, Inc.
Electrical Specifications
Thermal Characteristics
22.4 Thermal Characteristics
Table 22-2. Thermal Characteristics
Parameter Symbol Value Unit
Thermal Resistance
Plastic 100-pin LQFP surface mount
Plastic 144-pin LQFP surface mount
θ JA 43.5
46.1
°C/W
22.5 Power Dissipation
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Freescale Semiconductor, I
The average chip-junction temperature (T J ) in °C can be obtained from:
T J = T A + P D x θ JA (1)
where:
T A = Ambient temperature, °C
θ JA = Package thermal resistance, junction-to-ambient, °C/W
P D = P INT + P I/O
P INT = I DD × V DD , watts — chip internal power
P I/O = Power dissipation on input and output pins — user determined
For most applications, P I/O < P INT and can be neglected. An approximate relationship between
P D and T J (if P I/O is neglected) is:
P D = K ÷ (T J + 273°C) (2)
Solving equations 1 and 2 for K gives:
K = P D × (T A + 273°C) + θ JA × P
2
D (3)
where K is a constant pertaining to the particular part. K can be determined from equation (3)
by measuring P D (at equilibrium) for a known T A . Using this value of K, the values of P D and
T J can be obtained by solving equations (1) and (2) iteratively for any value of T A .
22.6 Electrostatic Discharge (ESD) Protection
Table 22-3. ESD Protection Characteristics
Parameter (1)
Symbol Value Units
ESD target for human body model HBM 2000 V
ESD target for machine model MM 200 V
HBM circuit description
MM circuit description
R Series 1500 W
C 100 pF
R Series 0 W
C 200 pF
1. All ESD testing is in conformity with CDF-AEC-Q100 Stress Test Qualification for
Automotive Grade Integrated Circuits.
MMC2107 – Rev. 2.0
Technical Data
MOTOROLA Electrical Specifications 587
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