PDF《Built in VCXO,》

Product structure:Silicon monolithic integrated circuit This product is not designed protection against radioactive rays 1/23 Datasheet TSZ22111?14?001 ?

2012 ROHM Co.

, Ltd. All rights reserved. TSZ02201-0E3E0J500040-1-2 17.AUG.2012 Rev.001 www.rohm.com j Built in VCXO, Spread-Spectrum Clock Generator BU3087FV Description BU3087FV has built in VCXO that is necessary for the Digital-TV signal reception. Connecting 27MHz crystal oscillator generates clock signals to 74.25MHz for Hi-Vision. BU3087FV has built in Spread-Spectrum function too. Features ?

3225 size crystal is usable ? ON / OFF of Spread-Spectrum is selectable ? Four kinds of Modulation-Rate is selectable (±0.25% / ±0.50% / ±0.75% / ±1.00%) ? Triangular Modulation Applications Digital-TV, STB, TV-Tuner Key Specifications ? Crystal Pullability ±105ppm (Typ.) ? Modulation Frequency 34.5kHz (Typ.) ? Cycle-to-Cycle Jitter 180psec (Typ.) ? Operating Current 45mA (Typ.) ? Operating Temperature -10℃ to +75℃ Package (Typ.) (Typ.) (Max.) SSOP-B16 5.00mm x 6.40mm x 1.35mm Typical Application Circuit (Caution) CL and RD in Typical Application Circuit should be optimized as to using crystal and board condition. SSOP-B16 3.3V (Typ.) 0.1μF XIN AVDD1 AVSS1 VCTRL AVDD2 AVSS2 MODSEL1 MODSEL2 XOUT PDB CLKOUT VDD VSS SSON TEST CLK27M 27MHz Crystal CL CL RD 0.1μF 0.1μF Figure 1. Typical Application Circuit 2/23 Datasheet Datasheet BU3087FV ?

2012 ROHM Co., Ltd. All rights reserved. www.rohm.com j TSZ22111?15?001 TSZ02201-0E3E0J500040-1-2 17.AUG.2012 Rev.001 Block Diagram 7:MODSEL1 with Pull-up 10:TEST with Pull-down 4:VCTRL 1:XIN 16:XOUT 14:CLKOUT Spread-Spectrum PLL 9:CLK27M VCXO Control Logic 15:PDB with Pull-up 11:SSON with Pull-up 8:MODSEL2 with Pull-down Pin Configuration Figure 2. Block Diagram Figure 3.Pin Configuration (TOP VIEW) XIN AVDD1 AVSS1 VCTRL AVDD2 AVSS2 MODSEL1 MODSEL2 XOUT PDB CLKOUT VDD VSS SSON TEST CLK27M

1 2

3 4

5 6

7 8

16 15

14 14

12 11

10 9 3/23 Datasheet Datasheet BU3087FV ?

2012 ROHM Co., Ltd. All rights reserved. www.rohm.com j TSZ22111?15?001 TSZ02201-0E3E0J500040-1-2 17.AUG.2012 Rev.001 Pin Function Table of Spread-Spectrum Modulation(1Pin_XIN input frequency =27.000000MHz) In the case of 11Pin_SSON=H, outputs it according to the following table. In the case of 11Pin?SSON=L, outputs unmodulated clock. PIN No. PIN Name Function

1 XIN Crystal Input terminal

2 AVDD1 Power supply for VCXO

3 AVSS1 GND for VCXO

4 VCTRL VCXO control input terminal

5 AVDD2 Power supply for PLL-Analog

6 AVSS2 GND for PLL-Analog

7 MODSEL1 Spread-Spectrum Modulation control terminal (Refer to Table of Spread-Spectrum Modulation) with pull-up

8 MODSEL2 Spread-Spectrum Modulation control terminal (Refer to Table of Spread-Spectrum Modulation) with pull-down

9 CLK27M 27.000000MHz Output

10 TEST Test terminal, with pull-down

11 SSON Spread-Spectrum ON/OFF choice(H:ON、L:OFF), with pull-up

12 VSS GND for PLL-Digital

13 VDD Power supply for PLL-Digital

14 CLKOUT 74.250000MHz Output

15 PDB Power-down control terminal, with pull-up

16 XOUT Crystal Output terminal MODSEL2 MODSEL1 CLKOUT L L 74.250000MHz ±0.25% Modulation L H 74.250000MHz ±0.50% Modulation H L 74.250000MHz ±0.75% Modulation H H 74.250000MHz ±1.00% Modulation 4/23 Datasheet Datasheet BU3087FV ?

2012 ROHM Co., Ltd. All rights reserved. www.rohm.com j TSZ22111?15?001 TSZ02201-0E3E0J500040-1-2 17.AUG.2012 Rev.001 Absolute Maximum Ratings (Ta=25°C) Parameter Symbol Ratings Unit Supply voltage VDD -0.3 to 4.0 V Input Voltage VIN -0.3 to VDD+0.3 V Storage Temperature range Tstg -55 to