MSC8154E Datasheet, PDF (25/68 Pages) Freescale Semiconductor, Inc – Quad-Core Digital Signal Processor with Security

Electrical Characteristics
2.3 Thermal Characteristics
Table 4 describes thermal characteristics of the MSC8154E for the FC-PBGA packages.
Table 4. Thermal Characteristics for the MSC8154E
Characteristic
Symbol
FC-PBGA
29 × 29 mm²
Unit
Natural
200 ft/min
Convection
(1 m/s) airflow
Junction-to-ambient^{1, 2}
Junction-to-ambient, four-layer board^{1, 2}
Junction-to-board (bottom)³
Junction-to-case⁴
R_θJA
18
R_θJA
13
R_θJB
5
R_θJC
0.6
12
°C/W
9
°C/W
°C/W
°C/W
Notes: 1. Junction temperature is a function of die size, on-chip power dissipation, package thermal resistance, mounting site (board)
temperature, ambient temperature, air flow, power dissipation of other components on the board, and board thermal
resistance.
2. Junction-to-ambient thermal resistance determined per JEDEC JESD51-3 and JESDC51-6. Thermal test board meets JEDEC
specification for the specified package.
3. Junction-to-board thermal resistance determined per JEDEC JESD 51-8. Thermal test board meets JEDEC specification for
the specified package.
4. Junction-to-case at the top of the package determined using MIL- STD-883 Method 1012.1. The cold plate temperature is used
for the case temperature. Reported value includes the thermal resistance of the interface layer
2.4 CLKIN Requirements
Table 5 summarizes the required characteristics for the CLKIN signal.
Table 5. CLKIN Requirements
Parameter/Condition¹
Symbol
Min
Typ
CLKIN duty cycle
—
40
—
CLKIN slew rate
—
1
—
CLKIN peak period jitter
—
—
—
CLKIN jitter phase noise at –56 dBc
—
—
—
AC input swing limits
ΔV_AC
1.5
—
Input capacitance
C_IN
—
—
Notes: 1. For clock frequencies, see the Clock chapter in the MSC8154E Reference Manual.
2. Measured at the rising edge and/or the falling edge at V_DDIO/2.
3. Slew rate as measured from ±20% to 80% of voltage swing at clock input.
4. Phase noise is calculated as FFT of TIE jitter.
Max
60
4
±150
500
—
15
Unit
%
V/ns
ps
KHz
V
pf
Notes
2
3
—
4
—
—
MSC8154E Quad-Core Digital Signal Processor with Security Data Sheet, Rev. 0
Freescale Semiconductor
25