BU2365FV ROHM Co. Ltd., BU2365FV Datasheet - Page 3

• Manufacturer Part Number: BU2365FV
• Description: Clock Generator With Built-in Vcxo
• Manufacturer: ROHM Co. Ltd.

※1 Period-Jitter 1σ
※2 Period-Jitter MIN-MAX
※3 Output Lock-Time
※4 Frequency stability
※5 Frequency sensitivity/Frequency sensitivity linearity
※ Common – Recommended crystal oscillators
※6 Buffer skew
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=30Ω
and Crystal oscillator load CL=10pF. Consequently, in order to use the BU2365FV, the specified crystal oscillator is
recommended.
This parameter represents standard deviation (=1σ) on cycle distribution data when the output clock cycles are sampled 1000
times consecutively, with the TDS7104 Digital Phosphor Oscilloscope of Tektronix Japan, Ltd.
This parameter represents a maximum distribution width on cycle distribution data when the output clock cycles are sampled
1000 times consecutively, with the TDS7104 Digital Phosphor Oscilloscope of Tektronix Japan, Ltd.
This parameter represents the elapsed time to reach a voltage of 3.0V after power supply turns ON and after the system is
switched from power-down to normal operation state, or after the output frequency is switched and is stabilized.
f0 : This parameter means an optimum frequency at T=25℃(27.000000 MHz). Frequency is dependent on the stability of the
crystal oscillator. Precautions should be taken when designing the system.
This parameter represents the frequency that falls within the area shown in Fig. 2, in the control circuit of control voltage
shown in Fig. 1. It shows the value of the IC. Since no consideration is given to the stability of the crystal oscillator, it should
be separately studied according to the system in use.
Frequency sensitivity dispersion range: f
However, frequency sensitivity linearity: －10ppm≦(f
This parameter is only functional when the BUF_OUT1 and the BUF_OUT2 are driven at the same load capacitance
－15ppm
－30ppm
－45ppm
－60ppm
Δf/f0
+60ppm
+45ppm
+30ppm
+15ppm
0ppm
∆f/f0
Fig. 2 Frequency Sensitivity Dispersion Range
Vc
L
Fig.1 Control Circuit of Control Voltage
L
= －45±15ppm, f
R2
f
L
f
H
C
－ f
R1
R1
3/16
C
C
) －( f
Hi-Z
= 0±15ppm, f
R1 R2=1 0.875
10Pin ： VCTRL
C
BU2365FV
－ f
9Pin ： VDD_V
：
L
) ≦＋10ppm
H
f
H
= 45±15ppm
H
Vc