Intel manual Circuit Implementations, 10.1 41110 Analog Voltage Filters, Config

	Circuit Implementations
Circuit Implementations	10

This chapter describes 41110 circuit implementations.

10.141110 Analog Voltage Filters

The 41110 requires several external analog voltage filter circuits to be placed on the system board, three for the PCI interface, one for the PCI Express interface, and one for the bandgap voltage. The 41110 lists the recommended filter values for these filter circuits -- any one of the filter circuits can use any one of the four R, L and C combinations shown in Table 16, except that configuration number 4 cannot be used for the PCI Express analog voltage filter.

Table 16. Recommended R, L and C Values for 41110 Analog Filter Circuits

Config	R	L	C
	0.5Ω ±1%	4.7uH ±25%	33uF ±20%
1		PCI, PCI-E: 45mA
	1/16W		6.3V
		Bandgap: 30mA
	0.5Ω ±1%	4.7uH ±20	22uF ±20%
2		PCI, PCI-E: 45mA
	1/16W		6.3V
		Bandgap: 30mA%
	0.5Ω ±1%	4.7uH ±20%	2x10uF ±20%
3		PCI, PCI-E: 45mA
	1/16W		6.3V
		Bandgap: 30mA
4a	1.0Ω ±1%	4.7uH ±20%	10uF ±20%
		PCI: 45mA
	1/16W		6.3V
		Bandgap: 30mA

a.Configuration number 4 cannot be used for the PCI Express analog voltage filter.

Additional Notes:

•L (Inductor)

—L must be magnetically shielded

—ESR: max < 0.4Ω

—rated at 45mA (or 30mA for bandgap circuit only)

•C (Capacitor)

—ESR: max < 0.5Ω

—ESL < 3.0nH

•R (Resistor)

—1/16W

Intel® 41110 Serial to Parallel PCI Bridge Design Guide 45