VSC8221 datasheet(120/138 Pages) MICROSEMI

Part #	VSC8221

Description	Single Port 10/100/1000BASE-T PHY with1.25 Gbps SerDes for SFPs/GBICs

PDF	138 Pages

Scroll/Zoom	100%

Manufacturer	MICROSEMI [Microsemi Corporation]

Direct Link	http://www.microsemi.com

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120 / 138 page

VSC8221

Data Sheet

VMDS-10106 Revision 4.1

December 2006

120 of 123

123

28.3 MDiNT Timing

The following specifications are valid only when the i/O power supply (VDDiOMiCRO) is at either 3.3 V, ±5%, or 2.5 V, ±5%.

28.4 Serial LED_CLK and LED_DATA Timing

The following specifications are valid only when the i/O power supply (VDD33A) is at 3.3V, ±5%.

Figure 26. LED_CLK and LED_DATA Output AC Timing

Table 55. MDiNT Timing Specifications

Symbol

Min

Typ

Max

Unit

Parameter Description & Conditions

110

MDiNT fall time, assuming a 2.2 kΩ external

pull-up resistor and a 50 pF total capacitive load.

Table 56. Serial LED_CLK and LED_DATA Timing Specifications

Symbol

Min

Typ

Max

Unit

Parameter Description & Conditions

TLED_CLK

µs

LED_CLK output period.

TLED_CLK-Pause

LED_CLK pause between LED bit sequence

repeat (un-preambled mode).

TLED_DATA-Delay

0.5

µs

LED_DATA propagation delay from rising edge

of LED_CLK.

LED_CLK

LED_DATA

LED_DATA-Delay

LED_CLK

LED_CLK-Pause

Bit 1 of 36

Bit 36 of 36

.......................

Bit 1 of 36

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