MC44354 Ver la hoja de datos (PDF) - Motorola => Freescale

Número de pieza

componentes Descripción

fabricante

MC44354

PLL Tuned UHF Audio/Video Modulator ICs for PAL, SECAM and NTSC TV Systems

Motorola => Freescale 

MC44353 MC44354 MC44355

30 V

VCCT

Figure 18. Typical Application

C22

0.1

C21

330 pF

R11

560 k

C20

0.01

R10

240 kΩ

C19

0.0047

R9

47 kΩ

C17

0.001 (Note 2)

C18

0.1

D3

HVU202A

R8

47 kΩ

L1

6.8 nH

(Note 3)

C16

0.001 (Note 2)

R6

33 kΩ

C14, 15

0.22

C10

0.1

C13 0.022

C12

0.0022 R4

100 k

HVUR17

R5

220 kΩ

HVUR17

D1

D2

C11 (Note 5)

L2

≈27 µH(Note 4)

1

Amp In

MC44353

2

Op Out

3

VCCD

20

Xtal

19

SDA

18

SCL

4.0 MHz

Cx

(Note 1)

SDA High

Speed

SCL Bus

4

Gnd

5

Osc1

6

Osc2

7

Gnd

8

Snd Filt

9

Snd Tun

10

Pre–Em

R7

220 kΩ

17

Mod Gnd

C6

16

0.1

VCC Mod

RF Out

Mod Gnd

15

C5

14 0.001

Video

VCCA

Audio

13

C3

12 0.01

11

C1, 2

0.2

R3

4.7 Ω

(Note 4)

TV Out

75 Ω ±1%

R2

Video In

C4

0.1

R1

1.0 k

Audio In

C8

100 pF

C9

220 pF

5.0 V

C7

10 µf

NOTES: 1. Cx depends on Crystal Load Capacitance, Crystal resistance < 200 Ω.

2. Tubular 0603 1.0 nF capacitors.

3. L1 is a 2 turn air coil.

4. L2 and R3 are non–surface mount components. Note L2 quality factor should be high enough to keep the

sound carrier at the typical level Q min @ 5.5 MHz = 43, Q min @ 6.0 MHz = 40, and Q min @ 6.5 MHz = 37.

5. C11 and L2 are selected to control the sound carrier center frequency and its tuning range.

6. D1 and D2 are hyper–abrupt varactor. Minimum capacitance ratio between 1.0 and 4.5 V is C1/C4.5 = 5.6

to cover the full frequncy range. (C @ 1.0 V = 50 pF min)

Modifications to the application layout (Figures 19 through

21) will have an effect on the overall application

performances. The most sensitive areas are around the UHF

Oscillator and RF Output (Pins 4 to 7 and Pins 14 to 17) so

care must be taken to reproduce a similar PCB layout in the

final application.

14

MOTOROLA ANALOG IC DEVICE DATA

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