Advance Product Information
Subject to Change
VSC7111 Datasheet
Electrical Specifications
4.2.2
High-Speed Data Outputs
The following table lists the AC characteristics of the high-speed outputs Y and YN.
Table 55.
AC Characteristics, High-Speed Outputs
Parameter
Symbol Minimum Typical Maximum Unit Condition
Serial NRZ output
data rate
DRY
0
11.5
Gbps Minimum data rate
will be limited by the
AC-couplingcapacitor
value (if AC-coupled)
Additive random
jitter
< 1
ps
RMS
INPLOW_PWR = 10
ODHIGHPOWER = 01
ODBOOST = 1
Duty cycle
distortion
DC
40
50
30
60
40
%
ps
Only applies to
101010 input data
patterns.
Rise time and fall
time
t
R_Y, tF_Y
20% to 80% with
INPLOW_PWR = 10
ODHIGHPOWER = 01
ODBOOST = 1
4.2.3
Two-Wire Serial Interface
The following table and illustration show the AC characteristics for the two-wire serial
interface.
Table 56.
AC Characteristics, Two-Wire Serial Interface
Parameter
Serial clock
Serial I/O
Symbol Minimum Maximum Unit
fSCK
fSDA
400
400
kHz
kHz
µs
Hold time START condition after this
period, the first CLK pulse is generated
tHD;STA
0.6
Low period of SCK
tLOW
tHIGH
tHD;DAT
tSU;DAT
tSU;STO
tBUF
1.3
0.6
µs
µs
µs
ns
µs
µs
pF
High period of SCK
Data hold time
0.09
100
0.6
Data setup time
Setup time for STOP condition
Bus free time between STOP and START
Capacitive load for each bus line
1.3
CB
Revision 2.0
September 2010
Confidential
Page 47
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
