MC68HC000EI20 Freescale Semiconductor, MC68HC000EI20 Datasheet - Page 142
MC68HC000EI20
Manufacturer Part Number
MC68HC000EI20
Description
IC MPU 16BIT 20MHZ 68-PLCC
Manufacturer
Freescale Semiconductor
Datasheet
1.MC68HC000IEI16.pdf
(189 pages)
Specifications of MC68HC000EI20
Processor Type
M680x0 32-Bit
Speed
20MHz
Voltage
3.3V, 5V
Mounting Type
Surface Mount
Package / Case
68-PLCC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC68HC000EI20
Manufacturer:
TI
Quantity:
14 500
Company:
Part Number:
MC68HC000EI20
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
Company:
Part Number:
MC68HC000EI20R2
Manufacturer:
FREESCAL
Quantity:
8 831
- Current page: 142 of 189
- Download datasheet (2Mb)
10.3 POWER CONSIDERATIONS
where:
For most applications, P I/O <P INT and can be neglected.
Solving Equations (1) and (2) for K gives:
where K is a constant pertaining to the particular part. K can be determined from equation
(3) by measuring P D (at thermal 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 .
The curve shown in Figure 10-1 gives the graphic solution to the above equations for the
specified power dissipation of 1.5 W over the ambient temperature range of -55 C to 125
surrounding the device. Lower values of J A cause the curve to shift downward slightly; for
instance, for J A of 40 /W, the curve is just below 1.4 W at 25 C.
package (case) surface ( J C ) and from the case to the outside ambient air ( C A ). These
terms are related by the equation:
dependent and can be minimized by such thermal management techniques as heat sinks,
ambient air cooling, and thermal convection. Thus, good thermal management on the part
of the user can significantly reduce
Substitution of J C for
temperature.
10-2
The average die-junction temperature, T J , in C can be obtained from:
An appropriate relationship between P D and T J (if P I/O is neglected) is:
The total thermal resistance of a package ( J A ) can be separated into two components,
J C and C A , representing the barrier to heat flow from the semiconductor junction to the
J C is device related and cannot be influenced by the user. However, C A is user
C using a maximum J A of 45 C/W. Ambient temperature is that of the still air
T J = T A +(P D • J A )
T A
P D
P INT
P I/O
P D = K (T J + 273 C)
K = P D • (T A + 273 C) + JA • P D
J A
J A = J C + C A
= Ambient Temperature, C
= Package Thermal Resistance, Junction-to-Ambient, C/W
= P INT + P I/O
= I CC x V CC , Watts — Chip Internal Power
= Power Dissipation on Input and Output Pins — User Determined
M68000 8-/16-/32-BIT MICROPROCESSORS USER'S MANUAL
Freescale Semiconductor, Inc.
J A in equation 1 results in a lower semiconductor junction
For More Information On This Product,
Go to: www.freescale.com
2
C A so that
J A approximately equals ; J C .
MOTOROLA
(1)
(2)
(3)
(4)
Related parts for MC68HC000EI20
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet: