VITESSE
SEMICONDUCTOR CORPORATION
2.488Gb/s SONET/SDH
Advance Product Information
STS-48/STM-16 Section Terminator
VSC8151
AC Timing Characteristics
Figure 8: Overhead Output Timing Diagram
E2
A2
C1/J0
A1
RXOHOUT[7:0]
RXOHCLK
TOHSU
TOHH
TOHCLKW
TFPSU
RXFPOUT
TFPW
Table 3: Overhead Output Timing (STS-48/STM-16 Mode)
Parameter
Description
Min
Typ
Max
Units
TOHSU
TOHH
TOHCLKW
TFPSU
Overhead output setup time with respect to RXOHCLK
Overhead output hold time with respect to RXOHCLK
Overhead output clock period
70.5
70.5
—
—
—
—
—
ns
ns
ns
ns
ns
154
—
—
Frame pulse setup time with respect to RXOHCLK
Frame pulse width
88
—
TFPW
51.34
—
51.44
Note: Generated Waveforms are synchronous and assume a 2.488GHz RXSCLKIN signal.
Table 4: Overhead Output Timing (STS-12/STM-4 Mode)
Parameter
Description
Min
Typ
Max
Units
TOHSU
TOHH
TOHCLKW
TFPSU
Overhead output setup time with respect to RXOHCLK
Overhead output hold time with respect to RXOHCLK
Overhead output clock period
73.5
73.5
—
—
—
—
—
ns
ns
ns
ns
ns
154
—
—
Frame pulse setup time with respect to RXOHCLK
Frame pulse width
104
—
TFPW
51.34
—
51.44
Note: Generated Waveforms are synchronous and assume a 622MHz RXSCLKIN signal.
Table 5: Overhead Output Timing (STS-3/STM-1 Mode)
Parameter
Description
Min
Typ
Max
Units
TOHSU
TOHH
TOHCLKW
TFPSU
Overhead output setup time with respect to RXOHCLK
Overhead output hold time with respect to RXOHCLK
Overhead output clock period
102
102
—
—
—
—
—
ns
ns
ns
ns
ns
154
—
—
Frame pulse setup time with respect to RXOHCLK
Frame pulse width
155
51.34
—
TFPW
—
51.44
Note: Generated Waveforms are synchronous and assume a 155MHz RXSCLKIN signal.
Page 14
VITESSE SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896
G52225-0, Rev. 2.9
12/1/99
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
