ppc460ex Applied Micro Circuits Corporation (AMCC), ppc460ex Datasheet - Page 76

• Manufacturer Part Number: ppc460ex
• Description: Powerpc 460ex Embedded Processor
• Manufacturer: Applied Micro Circuits Corporation (AMCC)

460EX – PPC460EX Embedded Processor
Thermal Monitor
Thermal monitoring of the chip is accomplished using the PNP transistor (β ≈ 2) provided on the chip. The collector
of the transistor is connected to ground (GND). The emitter (TherMonA) and base (TherMonB) are connected to
chip pins. A voltage measurement (V
values I
T = (q/nk)(V
Note: V
same. The small values require precision measurement and current sources.
Test Conditions
Clock timing and switching characteristics are specified in accordance with operating
conditions shown in Table 9 on page 71. AC specifications are characterized with
V
76
DD
= +1.5V, T
1
BE2
and I
BE2
PPC460EX
and V
C
2
−V
C
provides the chip temperature in °K according to the equation:
BE1
= +85 °C and a 50pF test load as shown in the figure to the right.
BE1
B
)/ln(I
E
should be specified in Volts. I
2
/I
TherMonA
TherMonB
1
) °K
where q = 1.602 176 53×10
BE1
V
Note: The bias voltage
and V
BE1
I
1
, I
, V
2
BE2
BE2
(Max = 300μA)
) across the TherMonA and TherMonB pins at the two current
1
and I
2
can be any units of measure provided they are the
-19
, n = 0.99 ± 0.05, and k = 1.380 6505×10
V
EB
should be between +0.5V and +0.7V.
Preliminary Data Sheet
Revision 1.12 – July 17, 2008
Output
Pin
AMCC Proprietary
-23
.
50pF