VSC8658 datasheet(71/95 Pages) MICROSEMI

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Electrical Specifications

VMDS-10242 VSC8658 Datasheet Revision 4.1

6.1.5

MAC and SerDes Outputs

For more information about the number and physical location of the MAC and SerDes output pins on the

VSC8658 device, see Pin Descriptions, page 72.

6.1.6

MAC and SerDes Inputs

For more information about the number and physical location of the MAC and SerDes input pins on the

VSC8658 device, see Pin Descriptions, page 72.

Input high voltage

VIH

2.1

3.6

Input low voltage

VIL

–0.3

0.9

Input leakage current

IILEAK

–42

µA

Internal resistor included

Output leakage current IOLEAK

–42

µA

Internal resistor included

Output low current

drive strength

IOL

8mA

Output high current

drive strength

IOH

–8

Table 66 •

DC Characteristics for MAC_RDP/N_n and SER_DOP/N_n Pins

Parameter

Symbol Minimum

Typical

Maximum

Unit

Condition

Frequency lock time TLOCK

500

µs

Output differential

voltage

VODIFF

700

1000

1200

Measured peak-to-

peak. Based on

100

Ω differential

load.

Output common-

mode voltage

VOCM

480

540

610

VDD12A = 1.20 V.

Output rise time and

fall time (20% to

80%)

tr , tf

300

Total jitter

185

260

Measured peak-to-

peak. Uses K28.5

test pattern. Bit error

rate (BER) = 10–12.

Output low current

drive strength

IOL

8mA

Output high current

drive strength

IOH

–8

Output driver

impedance per pin

Ω

Table 67 •

DC Characteristics for MAC_TDP/N_n and SER_DIP/N_n Pins

Parameter

Symbol Minimum

Maximum

Unit

Condition

Input differential voltage VIDIFF

120

2400

Measured peak-to-peak.

Based on 100

Ω

differential load.

Table 65 •

DC Characteristics for Pins Referenced to VDD33 at 3.30 V (continued)

Parameter

Symbol Minimum

Maximum

Unit Condition

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