Datasheet

Oscillator
MC68HC912D60C Colpitts Oscillator Specification
MC68HC912D60A — Rev. 3.1 Technical Data
Freescale Semiconductor Oscillator 189
Table 12-1. MC68HC912D60C EXTAL–XTAL Capacitor Values vs. Maximum ESR, Shunt
Capacitance, and VDDPLL setting
Maximum ESR vs. EXTAL–XTAL capacitor value, 1MHz resonators
Shunt
Capacitance
(pF)
(VDDPLL=VDD)
3 1570 2080 2620 2700 1870 1140 630 170
5 1460 1890 2340 2010 1370 830 460 120
7 1350 1730 2100 1550 1050 630 350 90
10 1210 1520 1600 1100 740 440 240 60
C
EXTAL-XTAL
(pF)
100pF 82pF 68pF 56pF 47pF 39pF 33pF 27pF 22pF 18pF
Maximum ESR vs. EXTAL–XTAL capacitor value, 2MHz resonators
Shunt
Capacitance
(pF)
(VDDPLL=VDD)
3 360 480 620 780 940 1100 1080 730 440 240
5 340 450 570 700 830 950 800 530 320 170
7 320 410 520 630 740 830 620 410 250 130
10 290 370 450 550 620 600 440 290 170 90
C
EXTAL-XTAL
(pF)
100pF 82pF 68pF 56pF 47pF 39pF 33pF 27pF 22pF 18pF
Maximum ESR vs. EXTAL–XTAL capacitor value, 4MHz resonators
Shunt
Capacitance
(pF)
(VDDPLL=VDD)
3 210 255 290 335 370 340 175 80
5 190 225 254 290 310 255 130 60
7 170 200 227 250 270 200 100 45
10 145 170 190 205 205 140 70 25
Shunt
Capacitance
(pF)
(VDDPLL=0)
3 250 300 350 400 440 325 165 75
5 225 265 305 340 345 245 120 55
7 200 235 265 295 270 190 90 40
10 175 200 220 240 195 135 65 20
C
EXTAL-XTAL
(pF)
47pF 39pF 33pF 27pF 22pF 18pF 13pF 10pF