Table of Contents
Advertisement
8.
Vih Minimum Input High Voltage (Vih) level for the PCI pins
Problem:
The Vih Minimum Input High Voltage (Vih) level for the PCI pins is being tested at 100 mV higher
than the minimum Vih level specified in Table 4-3 (DC Specifications for 3.3 V Signaling) of the
PCI Local Bus Specification, Revision 2.2. This Vih test limit only applies to cold temperature
testing specified to be 0°C.
The PCI Local Bus Specification, Revision 2.2 specifies the minimum Vih level to be 0.5 Vcc. The
Vcc specification is 3.3 V +/- 10% with the minimum Vcc specification (or minimum power level)
being tested at 3.0 V. The minimum Vih level per the PCI Specification should therefore be
0.5(3.0 V) or 1.5 V. The 80219 is unable to meet this minimum Vih level at cold temperature
testing specified to be 0°C.
Implication:
During cold temperature manufacturing testing, 80219 silicon is subjected to a 0°C environment
for an extended period of time. During this time the Vih test is implemented and the junction
temperature is at or near the test temperature of 0°C. This junction temperature is considered to be
far less than the temperature the 80219 silicon would be subjected to in a customer application
under operating conditions.
Below is an example calculation showing the expected junction temperature for a customer
application operating in an ambient temperature of 0°C:
Tj = junctions temperature, Ta = ambient temperature, qja = junction to ambient thermal
resistance of the package, P = power at minimum Vcc
Tj = Ta + (qja * P) where Ta = 0C, qja = 13.94 C/W assuming 200lfm airflow (see Table 11 of
the Intel
Tj = 0 + (13.94 C/W * 3.0 C)
Tj = 41.82 C
Workaround:
The minimum Vih level for the PCI pins will be tested at the PCI Local Bus Specification,
Revision 2.2 specification (0.5 Vcc) plus an additional 100 mV that equates to 1.6 V during cold
temperature manufacturing testing.
Status:
NoFix.
Specification Update
®
80219 General Purpose PCI Processor Datasheet), P = 3.0 W
®
Intel
80219 General Purpose PCI Processor
Non-Core Errata
23
Advertisement
Table of Contents
