VITESSE
SEMICONDUCTOR CORPORATION
2.488Gb/s SONET/SDH
Advance Product Information
STS-48/STM-16 Section Terminator
VSC8151
DC Characteristics
Table 16: High-Speed Differential Inputs and Outputs (HSPECL)
Parameter
Description
Min
Typ
Max
Units
Conditions
Data Output differential
voltage
(Peak to Peak, Single-ended)
Load = 100 Ohms
across TXSOUT+/– at
load
VODATA
550
—
1200
mV
Clock Output differential
voltage
(Peak to Peak, Single-ended)
Load = 100 Ohms
across TXCLKOUT+/–
at load
VOCLK
450
—
1200
mV
Output common-mode
voltage
Load = 100 Ohms
across diff pair
VOCM
RO
2100
40
—
—
—
3000
60
mV
ohms
mV
Output Impedance
Guaranteed, not tested.
AC Coupled, internally
biased to VTTL/2
VID
Input differential voltage
450
—
Table 17: Low-Speed Parallel LVPECL Inputs and Outputs
Parameter
Description
Min
Typ
Max
Units
Conditions
VOH
VOL
VIH
VIL
IIH
Output HIGH voltage
Output LOW voltage
Input HIGH voltage
Input LOW voltage
Input HIGH current
Input LOW current
VTTL-1020
VTTL-2000
VTTL-1165
VTTL-2000
—
—
—
—
—
—
—
VTTL-700
VTTL-1620
VTTL-700
VTTL-1475
200
mV
mV
mV
mV
µA
—
—
—
—
VIN = VIH (max)
VIN = VIL (min)
IIL
-50
—
µA
Note: (1) External Reference (VREF) = VTTL -1.32V ± 25mV.
(2) Load = 50Ω to VTTL -2.0V.
(3) External VREF current is 50µA per Input.
Table 18: TTL Inputs and Outputs
Parameter
Description
Output HIGH voltage
Min
Typ
Max
Units Conditions
VOH
VOL
VIH
VIL
IIH
2.4
0
—
—
—
—
—
—
—
V
V
IOH = -8mA
IOL = 8mA
—
Output LOW voltage
Input HIGH voltage
Input LOW voltage
Input HIGH current
Input LOW current
0.4
2.0
0
VTTL + 1.0V
V
0.8
500
—
V
—
-
µA
µA
VIN = 2.4V
VIN = 0.4V
IIL
-50
Table 19: Power Supply Currents (+2V/+3.3V Supplies, Outputs Open)
Parameter
Description
(Max)
Units
ITTL
IMM
PD
Power supply current from VTTL
Power supply current from VMM
Power dissipation
380
1100
3.6
mA
mA
W
Page 20
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 ]
