NXP Semiconductors MPC5746R, Datasheet

Page: 23 / 98

2. V
DD_LV
noise due to application in the range V
DD_LV
= 1.25V (+/-5%) with frequency below PLL bandwidth (40 KHz) will be
filtered.
Table 14. FMPLL1 electrical characteristics
Symbol Parameter Conditions
Value
Unit
Min Typ Max
f
PLL1IN
PLL1 input clock
1
— 38 — 78 MHz
Δ
PLL1IN
PLL1 input clock duty cycle
1
— 35 — 65 %
f
PLL1VCO
PLL1 VCO frequency — 600 — 1250 MHz
f
PLL1PHI0
PLL1 output clock PHI0 — 4.762 — 200 MHz
t
PLL1LOCK
PLL1 lock time — — — 100 µs
f
PLL1MOD
PLL1 modulation frequency — — — 250 kHz
|
δ
PLL1MOD
| PLL1 modulation depth (when enabled) Center spread 0.25 — 2 %
Down spread 0.5 — 4 %
|
Δ
PLL1PHI0SPJ
|
PLL1_PHI0 single period peak to peak
jitter f
PLL1PHI0
= 200 MHz, 6-
sigma pk-pk
— — 500
2
ps
I
PLL1
PLL1 consumption FINE LOCK state — — 6 mA
1. PLL1IN clock retrieved directly from either internal PLL0 or external XOSC clock. Input characteristics are granted when
using internal PLL0 or external oscillator is used in functional mode.
2. 1.25V +/-5%, application noise below 40kHz at V
DD_LV
pin - no frequency modulation
All oscillator specifications are valid for V
DD_HV_IO_JTAG
= 3.0 V to 5.5 V.
Table 15. XOSC External Oscillator electrical specifications
Symbol Parameter Conditions
Value Unit
Min Max
f
XTAL
Crystal Frequency Range
1
— 4 8 MHz
— >8 20
16MHz < freq < 40MHz (at present, freq =
20M and 40M have been validated, but still
needs to be carried out for freq = 16MHz)
>20 40
t
cst
Crystal start-up time
2 , 3
T
J
= 150 °C, 20 MHz ≤ f ≤ 40 MHz — 5 ms
t
rec
Crystal recovery time
4
— — 0.5 ms
V
IHEXT
EXTAL input high voltage
5
(External Reference)
V
REF
= 0.28 * V
DD_HV_IO_JTAG
V
REF
+ 0.6
— V
V
ILEXT
EXTAL input low voltage
(External Reference) V
REF
= 0.28 * V
DD_HV_IO_JTAG
— V
REF
-
0.6
V
C
S_EXTAL
Total on-chip stray capacitance
on EXTAL pin
6
BGA 4.75 5.25 pF
QFP 5.25 5.75
C
S_XTAL
Total on-chip stray capacitance
on XTAL pin
6
BGA 4.75 5.25 pF
QFP 5.25 5.75
g
m
Oscillator Transconductance T
J
= -40 °C to 150
°C
f
XTAL
≤ 8 MHz 3 13 mA/V
f
XTAL
≤ 20 MHz 9 35
Table continues on the next page...
Oscillator and FMPLL
SPC5746R Microcontroller Data Sheet, Rev. 6, 06/2017
NXP Semiconductors 23