VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
2.488Gb/s SONET/SDH
STS-48/STM-16 Section Terminator
VSC8151
Figure 9: Framing and B1 Error Output Timing
TFPW
RXFPOUT
RXFRERR
TFERRPW
TFERRSU
TSEFSU
RXSEF
Note: Waveforms not to scale
Table 6: Framing and B1 Error Output Timing (STS-48/STM-16 Mode)
Parameter
Description
Min
Typ
Max
Units
TFPW
Frame Pulse Width
—
—
—
—
51.4
61.2
25.7
48.3
—
—
—
—
ns
ns
ns
ns
TFERRSU
TFERRPW
TSEFSU
Frame Boundary Error delay with respect to RXFPOUT
Frame Boundary Error pulse width high
SEF transition delay time with respect to RXFPOUT
Note: Generated Waveforms are synchronous and assume a 2.488GHz RXSCLKIN signal.
Table 7: Framing and B1 Error Output Timing (STS-12/STM-4 Mode)
Parameter
Description
Min
Typ
Max
Units
TFPW
Frame Pulse Width
—
—
—
—
51.4
64.4
51.4
51.4
—
—
—
—
ns
ns
ns
ns
TFERRSU
TFERRPW
TSEFSU
Frame Boundary Error delay with respect to RXFPOUT
Frame Boundary Error pulse width high
SEF transition delay time with respect to RXFPOUT
Note: Generated Waveforms are synchronous and assume a 622MHz RXSCLKIN signal.
Table 8: Framing and B1 Error Output Timing (STS-3/STM-1 Mode)
Parameter
Description
Min
Typ
Max
Units
TFPW
Frame Pulse Width
—
—
—
—
51.4
0
—
—
—
—
ns
ns
ns
ns
TFERRSU
TFERRPW
TSEFSU
Frame Boundary Error delay with respect to RXFPOUT
Frame Boundary Error pulse width high
51.4
103
SEF transition delay time with respect to RXFPOUT
Note: Generated Waveforms are synchronous and assume a 155MHz RXSCLKIN signal.
G52225-0, Rev. 2.9
12/1/99
VITESSE SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896
Page 15
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