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
—
—
—
—
—
75
75
—
—
—
—
—
ns
ns
ns
ns
ns
154
90
Frame pulse setup time with respect to to RXOHCLK
Frame pulse width
TFPW
50
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
—
—
—
—
—
75
75
—
—
—
—
—
ns
ns
ns
ns
ns
154
100
50
Frame pulse setup time with respect to RXOHCLK
Frame pulse width
TFPW
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
—
—
—
—
—
50
100
154
150
50
—
—
—
—
—
ns
ns
ns
ns
ns
Frame pulse setup time with respect to to RXOHCLK
Frame pulse width
TFPW
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. 2.3
8/16/99
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
