VSC8021FC VITESSE [Vitesse Semiconductor Corporation], VSC8021FC Datasheet - Page 5

• Manufacturer Part Number: VSC8021FC
• Description: 2.5Gb/s SONET-Compatible 8-Bit MUX/DEMUX Chipset
• Manufacturer: VITESSE [Vitesse Semiconductor Corporation]

High speed differential clock input
Frame detection confirm output
High speed serial data inputs
NOTES:
1) Negative edge is active edge.
2) The parallel data outputs only begin showing valid data after the last A2 of the SONET framing sequence. The example
waveforms shown above use an STS-3 framing sequence for convenience, thus valid data is output after the third
A2 in the sequence.
Frame recovery clock input
BYCKO (BYCKON)
Output Summary
Parallel Data•
CLKI (CLKIN)
Byte clock output
= Don’t care.
(1)
D1 (D1N)
D2 (D2N)
D3 (D3N)
D7 (D7N)
D8 (D8N)
D4 (D4N)
D5 (D5N)
D6 (D6N)
DI (DIN)
OOFN
(2)
FP
BYCKO
Resynch
A1
t
OOFNPW
t
OOFN
t
C
A1
A1
A1
t
DFP
A1
A2
SONET STS-3 Framing Sequence
A2
A2
A2
A2
DATA
A2
t
PFP
DATA
Valid
Valid
Valid
Data
Valid
Valid
Valid
Valid
Valid
t
BD
DATA
Data
Data
Data
Data
Data
Data
Data
Data
Data
DATA
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Data
t
D
DATA
Data
Data
Data
Data
Data
Data
Data
Data
Data