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