BU2365FV_08 Datasheet, PDF (3/17 Pages) Rohm – Clock Generator with Built-in VCXO for Audio/Video Equipments

※1 Period-Jitter 1σ
This parameter represents standard deviation (=1σ) on cycle distribution data at the time when the output clock cycles are
sampled 1000 times consecutively with the TDS7104 Digital Phosphor Oscilloscope of Tektronix Japan, Ltd.
※2 Period-Jitter MIN-MAX
This parameter represents a maximum distribution width on cycle distribution data at the time when the output clock cycles are
sampled 1000 times consecutively with the TDS7104 Digital Phosphor Oscilloscope of Tektronix Japan, Ltd.
※3 Output Lock-Time
This parameter represents elapsed time after power supply turns ON to reach a voltage of 3.0 V, after the system is switched from
Power-Down state to normal operation state, or after the output frequency is switched, until it is stabilized at a specified frequency,
respectively.
※4 Frequency stability
f0 : This parameter means an optimum frequency at T=25℃(27.000000 MHz), which represents a value of a single piece of IC.
Since no consideration is given to the stability of the crystal oscillator, it should be separately studied according to the system in
use.
※5 Frequency sensitivity/Frequency sensitivity linearity
These parameters represents that the frequency falls within the area shown in Fig. 2 in the control circuit of control voltage shown
in Fig. 1. It shows the value of IC itself. Since no consideration is given to the stability of the crystal oscillator, it should be
separately studied according to the system in use.
※Common – Recommended crystal oscillators
The electrical characteristics shown above have been all evaluated with the use of the crystal oscillator NX5032GA (Spec. No.
EXS00A-00278) manufactured by NIHON DEMPA KOGYO CO., LTD., under the conditions of Limiting resistance Rd=30Ωand
Crystal oscillator load CL=10pF. Consequently, in order to use the BU2365FV, the said crystal oscillator is recommended.
R2
Vc
R1
9Pin： VDD_V
10Pin： VCTRL
R1
BU2365FV
R1： R2=1： 0.875
Fig.1 Control Circuit of Control Voltage
Δf/Δff0/f0
f_H
+60ppm
+45ppm
+30ppm
f_C
+15ppm
0ppm
Vc
－15ppm
－30ppm
－45ppm
－60ppm
f_L
L
Hi-Z
H
Frequency sensitivity dispersion range: f_L = －45±15ppm, f_C = 0±15ppm, f_H = 45±15ppm
However, frequency sensitivity linearity: －10ppm≦(f_H － f_C) －( f_C － f_L) ≦＋10ppm
Fig. 2 Frequency Sensitivity Dispersion Range
※6 Buffer skew
This parameter is only functional when the BUF_OUT1 and the BUF_OUT2 are driven at the same load capacitance.
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