Intel 2 Duo L7500 LE80537LG0254M User Manual

Datasheet

25

The processor supports the THERMTRIP# signal for catastrophic thermal protection. An 

external thermal sensor should also be used to protect the processor and the system 

against excessive temperatures. Even with the activation of THERMTRIP#, which halts 

all processor internal clocks and activity, leakage current can be high enough such that 

the processor cannot be protected in all conditions without the removal of power to the 

processor. If the external thermal sensor detects a catastrophic processor temperature 

of 125°C (maximum), or if the THERMTRIP# signal is asserted, the VCC supply to the 

processor must be turned off within 500 ms to prevent permanent silicon damage due 

to thermal runaway of the processor. THERMTRIP# functionality is not guaranteed if the 

PWRGOOD signal is not asserted.

All RESERVED (RSVD) pins must remain unconnected. Connection of these pins to V

CC

, 

V

SS

, or to any other signal (including each other) can result in component malfunction 

or incompatibility with future processors. See 

 for a pin listing of the processor 

and the location of all RSVD pins.

For reliable operation, always connect unused inputs or bidirectional signals to an 

appropriate signal level. Unused active low AGTL+ inputs may be left as no connects if 

AGTL+ termination is provided on the processor silicon. Unused active high inputs 

should be connected through a resistor to ground (V

SS

). Unused outputs can be left 

unconnected. 

The TEST1 and TEST2 pin must have a stuffing option connection to V

SS

 separately via 

1-kΩ, pull-down resistors.

1

1

1

0

0

0

1

0.0875

1

1

1

0

0

1

0

0.0750

1

1

1

0

0

1

1

0.0625

1

1

1

0

1

0

0

0.0500

1

1

1

0

1

0

1

0.0375

1

1

1

0

1

1

0

0.0250

1

1

1

0

1

1

1

0.0125

1

1

1

1

0

0

0

0.0000

1

1

1

1

0

0

1

0.0000

1

1

1

1

0

1

0

0.0000

1

1

1

1

0

1

1

0.0000

1

1

1

1

1

0

0

0.0000

1

1

1

1

1

0

1

0.0000

1

1

1

1

1

1

0

0.0000

1

1

1

1

1

1

1

0.0000