MC44BC374CDTB 데이터 시트보기 (PDF) - Freescale Semiconductor

부품명

상세내역

제조사

MC44BC374CDTB

PLL Tuned UHF and VHF Audio/Video High Integration Modulator

Freescale Semiconductor 

Freescale Semiconductor, Inc. Audio Characteristics

11 Audio Characteristics

Unless otherwise stated: Vcc=5.0V, Ambient Temperture=25oC, Video Input 1Vp-p, 10-step grayscale.

RF inputs/outputs into 75Ohm load. SPECIFICATIONS ONLY VALID FOR ENVELOPE

DEMODULATION.

Parameter

Test Conditions

Min Typ

Picture-to-Sound ratio

Audio modulation depth

Audio input resistance

Audio Frequency response

Audio Distortion FM (THD only)

Audio Distortion AM (THD only)

Audio S/N with Sync Buzz FM

Audio S/N with Sync Buzz AM

PS bit set to 0

PS bit set to 1

13 16

9

12

Using specific pre-emphasis circuit,

audio input level=205mVrms–audio frequency=1kHz

AM modulation: SECAM Fs=6.5MHz

— 80

FM modulation: Fs=5.5, 6 or 6.5MHz

100% modulation=±50kHz FM deviation

—

80

FM modulation: NTSC Fs=4.5MHz

100% modulation=±25kHz FM deviation

—

80

45 53

Reference 0dB at 1kHz,

using specified pre-emphasis circuit,

measure from 50Hz to 15kHz

–2.5 —

at 1kHz, 100% modulation (±50kHz)

No video

— 0.4

at 1kHz, 100% modulation

No video

— 1.5

Ref 1Khz, 50% modulation (+/-25Khz)

EBU color bars Video signal,

using CCIR 468.2 weighting filter

48 53

Reference 1kHz, 85% modulation

Video input EBU color bar 75%

Audio BW 40Hz—15kHz

Weighting filter CCIR 468-2

45 50

Max

19

15

—

—

—

61

+2

2

2.5

—

—

Unit Type

dB

B

%

B

%

B

%

B

KΩ A

dB

C

%

C

%

D

dB

C

dB

D

Audio Signal to Nois e

58

56

Typical

54

52

50

48

Minimum specification

46

471 521 571 621 671 721 771 821 871

Fr e que ncy (M hz )

Figure 5. Typical Performances

MC44BC373C/374C Technical Data

For More Information On This Product,

Go to: www.freescale.com

Share Link: