MC44BC375UAD(2003) 查看數據表（PDF） - Freescale Semiconductor

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MC44BC375UAD
(Rev.:2003)

PLL Tuned VHF Audio/ Video High Integration IC (Channel 3 and 4 80 dBµV RF Level)

Freescale Semiconductor 

Freescale Semiconductor, Inc. Video Characteristics

10 Video Characteristics

Parameter

Video bandwidth

Video input level

Video input current

Video input impedance

Video S/N

Differential Phase

Differential Gain

Test Conditions

Reference 0dB at 100kHz, measured at 5MHz

75Ohm load

Unweighted

Weighted

On line 17 in M standard (FCC)

On line 17 in M standard (FCC)

Luma/Sync ratio

Input ratio 7.0:3.0

Video modulation depth Video input level=1.0 Vcbvs

Peak White Clip

Video Modulation Depth for Video=1.4 Vcbvs

Min Typ Max Unit Type

-1.5 -0.5 — dB C

—

—

1.5 Vcvbs D

—

0.2

1

µA A

— 500 — KΩ A

49

52

56

60

dB C

dB C

+/-1.5 +/-5 deg C

1

5

%

C

6.8 /

3.2

—

7.2 /

2.8

—

B

80

85

90

%

B

90.5 95 99.5 %

B

11 Audio Characteristics

All audio measurement use specified pre-emphasis circuit.

Parameter

Test Conditions

Min Typ Max Unit Type

Picture to Sound ratio

PSS (Pin2) = HI

PSS (Pin2) =LO

14

12

16

14

18 dB

16 dB

B

Picture to Sound ratio difference between PSS = HI and PSS = LO

1.5 2.0 2.5 dB B

Using specific pre-emphasis circuit - Audio Input: 1Khz @ 205 mVrms

Audio FM Modulation Depth

Audio input resistance

Fs = 4.5 MHz

(100% Modulation = +/- 25 kHz FM Deviation)

Fs = 5.5 MHz

(100% Modulation = +/- 50 kHz FM Deviation)

75 85 95 % B

75 85 95 % B

45 55 61 kΩ A

Audio Frequency response

0dB ref @1kHz

Measure from 50Hz to 15kHz

-2.5 - +2 dB C

Audio Distortion FM (THD only) At 1 kHz and 100% mod (+/- 50 kHz) - No Video - 0.3 1 % C

Audio S/N with Sync Buzz FM

50 53 - dB C

12 Characterization Measurement Conditions

Device default configuration unless otherwise specified:

• Sound subcarrier frequency = 5.5Mhz

• Picture-to-sound carrier ratio = 12dB

• CH3 & CH4 frequencies

RF Inputs / Output into 75ohm Load using a 75 to 50 ohm transformation.Video Input 1V pk-pk.Audio

pre-emphasis circuit engaged.

MC44BC375UA Advance Information

For More Information On This Product,

Go to: www.freescale.com

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