|Category||Multimedia => Video|
|Datasheet||Download NJM2542 datasheet
DESCRIPTION The is a VIF/SIF demodulator especially designed for TV and VCR based on the NTSC system. FM-PLL(Phase Locked Loop) detector reduces the number of pins and external parts, for efficient use of set space. FEATURES Operating Voltage 5V Alignment-free Automatic Frequency Tuning Alignment-free FM-PLL Demodulator Intercarrier type Bipolar Technology Package Outline: SSOP20 NJM2542V PACKAGE OUTLINE
ABSOLUTE MAXIMUM RATINGS Parameter Symbol Supply Voltage Vcc Power Dissipation PD Operating Temperature Range Topr Storage Temperature Range Tstg * Test IC soldered on PC board RECOMMENDED OPERATING VOLTAGE RANGE Parameter Condition Operating Voltage ELECTRICAL CHARACTERISTICS Standard Test Conditions: (TA =25°C,Vcc=5V,IF=45.75MHz/90dBuV,IF IN has 1:1Transformer instead of SAW filter.) Parameter Condition Symbol Min. Typ. AFT-Defeat Supply Current Icc 51 IFGR-MAX(AGCFLT=GND) VIF Section No IF Signal Video Output Level (DC) VDC 3.6 FGR-MAX(AGCFLT=GND) Video Output Level Video 100% White,87.5% Mod 1.5 1.9 Video Bandwidth -3dB Point fvc 7 Video S/N VIDEO:100% White,87.5%Mod Video S/N 50 56 Intermodulation 34 40 Differential Gain DG ±2 Differential Phase DP ±2 Input Signal Voltage Sensitivity -3dB Point VINMIN 44 Maximum Input signal Voltage VS Ratio (>24%,<34%) VINMAX 105 IF Gain Control Range VINMAX-VINMIN 61 RF AGC Maximum Voltage IFGR-MAX(AGCFLT=GND) VRAH 4.9 RF AGC Minimum Voltage IFGR-MIN(AGCFLT= V+) VRAL 0 0.03 Picture Carrier Capture Range 1 CL-U 1.3 Picture Carrier Capture Range 2 CL-L 3.5 AFT Sensivity 20 30 AFT Maximum Voltage VAFH 4.2 4.9 AFT minimum Voltage VAFL 0 0.05 Sync Level VOSYNC 1.35 AFTOUT=2.5V VCO Frequency Range FVCOWB ±250 Center=45.65MHz SIF Section(SIF=4.5MHz/90dBuV) Audio Output DC Voltage LIMIN=4.5MHz CW VDCA 1.8 2.2 Audio Output LIMIN=4.5MHz FM±25kHz dev VAFO 390 540 Total Harmonic Distortion LIMIN=4.5MHz FM±25kHz dev THDAF 0.2 Input Limiting Voltage Sensivity LIM 38 AM Rejection Ratio FM±25kHzDEV :AM30% AMR 50 56 Audio S/N De-Emphasis: ON AF S/N 56 Max. Unit mA Symbol Vcc Min. 4.75 Typ. 5.0 (TA=25°C) Max. Unit V (TA=25°C) Unit mW °C
Symbol EQOUT APCFLT EQIN VCOL1 VCOL2 VREF VDETOUT AGCFLT2 LIMIN AFOUT AFNFB AGCFLT1 RFAGCOUT GND IFIN1 IFIN2 RFAGCADJ AFTOUT EQ
Description Equalizer AMP Output APC Filter (PLL loop Filter) Equalizer AMP Input Power Supply VCO Coil 1 VCO Coil 2 Reference Voltage for Audio Video Demodulator Output AGC Filter 2 Limiter (sound intercarrier) Input Audio Output Audio High Pass Filter AGC Filter 1 RF AGC Output GND IF Differential Input 1 IF Differential Input 2 RF AGC Adjustment AFT Output Equalizer
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