VITESSE
SEMICONDUCTOR CORPORATION
Data Sheet
2.48832Gb/s 16:1 SONET/SDH
Transceiver with Integrated Clock Generator
VSC8140
DC Characteristics
Table 3: DC Characteristics (Over recommended operating conditions)
Parameters
Description
Min
Typ
Max
Units
Conditions
Output HIGH voltage (TXOUT,
TXCLKOUT)
VOHHSO
VCC-0.40
—
VCC
V
50Ω termination to VCC
Output LOW voltage (TXOUT,
TXCLKOUT)
VOLHSO
V
CC-1.20
—
VCC-0.50
1000
V
50Ω termination to VCC
Output differential voltage
(TXCLKOUT)
450
600
600
100Ω termination between ±
∆VODHSO
mV
output at load. See Figure 13.
Output differential voltage
(TXOUT)
500
1000
100Ω termination between ±
VCMHSO
RHSO
Output common-mode voltage
Back termination impedance
VCC-1.20
40
—
—
—
VCC-0.300
V
Ω
output at load. See Figure 13.
60
—
Guaranteed, but not tested
AC-coupled, internally
biased to (VCC+VEE)/2.
Serial input differential voltage
(RXIN, RXCLKIN)
∆VIHS
200
mV
VOHL
VOL
Output HIGH voltage (LVPECL) VCC-1.020
—
—
VCC-0.700
VCC-1.620
V
V
See Figure 24
See Figure 24
Output LOW voltage (LVPECL)
VCC-2.000
Low-speed output voltage single-
ended, peak-to-peak swing
(LVPECL)
∆VO
600
—
1300
mV
See Figure 24
VIH
VIL
IIH
IIL
Input HIGH voltage (LVPECL)
Input LOW voltage(LVPECL)
Input HIGH current (LVPECL)
Input LOW current (LVPECL)
Input Resistance (LVPECL)
VCC-1.100
VCC-2.0
—
—
—
—
—
—
VCC-0.700
VCC-1.540
200
V
V
—
—
µA
µA
Ω
VIN=VIH (max)
VIN=VIL(min)
—
-50
—
Ri
10k
—
Input differential voltage
(LVPECL)
∆VI
200
—
—
—
mV
V
—
—
Input common-mode voltage
(LVPECL)
VCM
V
CC-1.5
VCC-0.5
VOH
VOL
VIH
VIL
IIH
Output HIGH voltage (TTL)
Output LOW voltage (TTL)
Input HIGH voltage (TTL)
Input LOW voltage (TTL)
Input HIGH Current (TTL)
Input LOW current (TTL)
Supply voltage
2.4
—
—
—
—
0.5
V
V
IOH = -1.0mA
IOL = +1.0mA
—
2.0
0.0
—
—
5.5
V
—
0.8
V
—
—
500
-500
3.47
2.75
800
µA
µA
V
VIN = 2.4V
VIN = 0.5V
3.3V± 5%
Outputs open
Outputs open
IIL
—
—
VCC
PD
3.14
—
—
Power dissipation
2.25
—
W
mA
ICC
Supply current
—
G52251-0, Rev. 4.0
9/6/00
VITESSE SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896
Page 17
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