VITESSE
SEMICONDUCTOR CORPORATION
Data Sheet
ATM/SONET/SDH 622 Mb/s Transceiver Mux/Demux
with Integrated Clock Generation and Clock Recovery
VSC8114
AC Characteristics
Table 7: PECL and TTL Outputs
Parameter
Description
Min
Typ
Max
Units
Conditions
10-90%
TR,TTL
TF,TTL
TR,PECL
TF,PECL
TTL Output Rise Time
TTL Output Fall Time
PECL Output Rise Time
PECL Output Fall Time
—
—
—
—
2
—
—
—
—
ns
ns
ps
ps
1.5
350
350
10-90%
20-80%
20-80%
DC Characteristics
Table 8: PECL and TTL Inputs and Outputs
Parameter
Description
Min
Typ
Max
Units
Conditions
Output HIGH
voltage (PECL)
VOH
—
—
—
VDDP – 0.9V
—
V
V
—
—
Output LOW
voltage (PECL)
VOL
0.7
1.1
O/P Common
Mode Range
(PECL)
VOCM
—
VDDP – 1.3V
V
—
Differential Output
Voltage (PECL)
∆VOUT75
∆VOUT50
VIH
600
—
—
—
—
—
—
—
—
—
1300
mV
mV
V
75Ω to VDDP – 2.0V
50Ω to VDDP – 2.0V
For single ended
For single ended
—
Differential Output
Voltage (PECL)
600
1300
Input HIGH voltage
(PECL)
VDDP – 0.9V
VDDP – 0.3V
Input LOW voltage
(PECL)
VIL
0
VDDP – 1.72V
V
Differential Input
Voltage (PECL)
∆VIN
VICM
VOH
400
1600
mV
V
I/P Common Mode
Range (PECL)
1.5 – ∆VIN/2
VDDP – 1.0 – ∆VIN/2
—
Output HIGH
voltage (TTL)
2.4
—
—
0.5
5.5
V
IOH = -1.0 mA
IOL = +1.0 mA
—
Output LOW
voltage (TTL)
VOL
V
Input HIGH voltage
(TTL)
VIH
2.0
V
G52185-0, Rev 4.0
11/1/99
VITESSE SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896
Page 11
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