MSC8144 Freescale Semiconductor, MSC8144 Datasheet - Page 44

• Manufacturer Part Number: MSC8144
• Description: Quad Core Digital Signal Processor
• Manufacturer: Freescale Semiconductor

Electrical Characteristics
2.7.5.4
LP-Serial transmitter electrical and timing specifications are stated in the text and tables of this section. The differential return
loss, S11, of the transmitter in each case shall be better than
The reference impedance for the differential return loss measurements is 100 Ω resistive. Differential return loss includes
contributions from internal circuitry, packaging, and any external components related to the driver. The output impedance
requirement applies to all valid output levels. It is recommended that the 20–80% rise/fall time of the transmitter, as measured
at the transmitter output, have a minimum value 60 ps in each case. It is also recommended that the timing skew at the output
of an LP-Serial transmitter between the two signals comprising a differential pair not exceed 25 ps at 1.25 GB, 20 ps at 2.50
GB, and 15 ps at 3.125 GB.
44
Output Voltage,
Differential Output Voltage
Deterministic Jitter
Total Jitter
Multiple output skew
Unit Interval
Output Voltage,
Differential Output Voltage
Deterministic Jitter
Total Jitter
Multiple Output skew
Unit Interval
Output Voltage,
Differential Output Voltage
Deterministic Jitter
Total Jitter
Multiple output skew
Unit Interval
•
•
–10 dB for (baud frequency)/10 < freq(f) < 625 MHz, and
–10 dB + 10log(f/625 MHz) dB for 625 MHz ≤ freq(f) ≤ baud frequency
Characteristic
Characteristic
Characteristic
Transmitter Specifications
Table 29. Short Run Transmitter AC Timing Specifications—3.125 GBaud
Table 27. Short Run Transmitter AC Timing Specifications—1.25 GBaud
Table 28. Short Run Transmitter AC Timing Specifications—2.5 GBaud
MSC8144 Quad Core Digital Signal Processor Data Sheet, Rev. 1
Symbol
Symbol
Symbol
V
V
V
DIFFPP
DIFFPP
DIFFPP
S
S
S
V
V
V
J
J
J
J
UI
J
UI
J
UI
MO
MO
MO
O
D
T
O
D
T
O
D
T
–0.40
–0.40
-0.40
Min
500
800
Min
500
400
Min
500
320
Range
Range
Range
1000
1000
1000
1000
1000
1000
Max
2.30
0.17
0.35
Max
2.30
0.17
0.35
Max
2.30
0.17
0.35
800
400
320
mV
mV
mV
UI
UI
UI
UI
UI
UI
Unit
Unit
Unit
ps
ps
ps
ps
ps
ps
V
V
V
PP
PP
PP
PP
PP
PP
PP
PP
PP
Voltage relative to COMMON of either signal
comprising a differential pair
Skew at the transmitter output between lanes of a
multilane link
Voltage relative to COMMON of either signal
comprising a differential pair
Skew at the transmitter output between lanes of a
multilane link
comprising a differential pair
Skew at the transmitter output between lanes of a
multilane link
Voltage relative to COMMON of either signal
±100 ppm
±100 ppm
±100 ppm
Notes
Notes
Notes
Freescale Semiconductor