NXP Semiconductors MPC5777M - Aurora LVDS Electrical Characteristics

MPC5777M Microcontroller Data Sheet, Rev. 6
Electrical characteristics
NXP Semiconductors72
3.13 Aurora LVDS electrical characteristics
The following table describes the Aurora LVDS electrical characteristics.
NOTE
The Aurora interface is AC coupled, so there is no common-mode voltage specification.
f
VCO
CC PLL VCO frequency — — 640
2
—MHz
t
LOCK
CC PLL phase lock
3
———40µs
PER
REF
SR Input reference clock jitter (peak to peak) Single period,
f
RF_REF
=10MHz
——300ps
Long term,
f
RF_REF
=10MHz
–500 — 500 ps
PER
EYE
CC Output Eye Jitter (peak to peak)
4
———400ps
1
The specifications in this table apply to both the interprocessor bus and debug LFAST interfaces.
2
The 640 MHz frequency is achieved with a 10 MHz or 20 MHz reference clock. With a 26 MHz reference, the VCO
frequency is 624 MHz.
3
The time from the PLL enable bit register write to the start of phase locks is maximum 2 clock cycles of the peripheral
bridge clock that is connected to the PLL on the device.
4
Measured at the transmitter output across a 100 Ohm termination resistor on a device evaluation board. See
Figure 19.
Table 34. Aurora LVDS electrical characteristics
1,2
Symbol Parameter Conditions
Value
Unit
Min Typ Max
Transmitter
F
TX
CC Transmit Data Rate — — — 1.25 Gbps
V
OD_LVDS
 CC Differential output voltage swing
(terminated)
3
— ±400 ±600 ±800 mV
t
TR_LVDS
CC Rise/Fall time (10%–90% of swing) — 60 — — ps
R
V_L_Tx
SR Differential Terminating resistance — 81 100 120 
T
Loss
CC Transmission Line Loss due to loading
effects
———6
4
dB
Transmission line characteristics (PCB track)
L
LINE
SR Transmission line length — — — 20 cm
Z
LINE
SR Transmission line characteristic impedance — 45 50 55 
C
ac_clk
SR Clock Receive Pin External AC Coupling
Capacitance
Values are nominal, valid
for +/– 50% tolerance
100 — 270 pF
Table 33. LFAST PLL electrical characteristics
1
(continued)
Symbol Parameter Conditions
Value
Unit
Min Nominal Max