Datasheet

 2018 Microchip Technology Inc. Data Sheet Complete DS40002058A-page 96
ATxmega128A1U/ATxmega64A1U
Note: 1. Numbers for negative impedance are not tested in production but guaranteed from design and characterization.
R
Q
Negative
impedance
(1)
FRQRANGE=0
0.4MHz resonator, CL=100pF 13k

1MHz crystal, CL=20pF 9k
2MHz crystal, CL=20pF 2.2k
FRQRANGE=1
1MHz crystal, CL=20pF 2.3k
2MHz crystal, CL=20pF 8k
9MHz crystal, CL=20pF 200
FRQRANGE=2
8MHz crystal, CL=20pF 225
9MHz crystal, CL=20pF 300
12MHz crystal, CL=10pF 175
FRQRANGE=3
8MHz crystal, CL=20pF 340
9MHz crystal, CL=20pF 400
12MHz crystal, CL=10pF 330
12MHz crystal, CL=12pF 230
16MHz crystal, CL=10pF 115
ESR SF = safety factor
min(R
Q
)/
SF
k
Start-up time
XOSCPWR=0,
FRQRANGE=0
0.4MHz resonator, CL=100pF 1.0
ms
XOSCPWR=0,
FRQRANGE=1
2MHz crystal, CL=20pF 2.6
XOSCPWR=0,
FRQRANGE=2
8MHz crystal, CL=20pF 0.8
XOSCPWR=0,
FRQRANGE=3
12MHz crystal, CL=20pF 1.0
XOSCPWR=1,
FRQRANGE=3
16MHz crystal, CL=20pF 1.4
C
XTAL1
Parasitic capacitance XTAL1 pin 6
pF
C
XTAL2
Parasitic capacitance XTAL2 pin 10
C
LOAD
Parasitic capacitance load 3.8
Symbol Parameter Condition Min. Typ. Max. Units