NTE1805 Integrated Circuit Recording Video Signal Processing Circuit Description: The NTE1805 is an integrated circuit in a 28–Lead DIP type package designed for use in VCR recording video signal processing. Features: D Dynamic Emphasis Characteristics: 5.5dB (at f = 1MHz, input level = –20dB) D Built–In Carrier Interleaving Circuit D Built–In Low Pass Filter (Sync–Separation Circuit) D Supply Voltage: VCC = 5V Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V Power Dissiption (TA = +70°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250mW Operating Ambient Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +70°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to ∼+150°C Electrical Characteristics: (VCC = 5V, TA = +25°C unless otherwise specified) Parameter Circuit Current Symbol I20 AGC Output Amplification u8 Test Conditions Min Typ Max Unit Pin12 High (Record) 14.5 – 35.5 mA Pin12 Open (Playback) 14.5 – 35.5 mA Pin12 High, Video Input 1VP–P 0.4 – 0.8 VP–P – – 1.5 dB 6.8 – 9.9 dB 10.4 – 13.4 dB 2.9 – 3.9 MHz AGC Control Sensitivity Du8 Pin12 High, Video Input 0.5 to 2VP–P Playback Amp Gain G6–8 Pin12 Open 12dB Amp Gain G15–16 FM Oscillation Frequency fo 2nd 2fo – – –33 dB FM Oscillation Output Amplification u28 0.65 – 1.35 VP–P Frequency Control Sensitivity FM Oscillation b28 11.4 – 14.5 kHz/µA FM Output High Frequency Pin12 High, CO = 39pF, RO = 12kΩ Pin12 High, CO = 39pF, RO = 8.2 to 15kΩ Note 1. Operating Supply Voltage Range: VCC = 4.5V to 5.5V. Electrical Characteristics (Cont’d): (VCC = 5V, TA = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Sync Separator Input Sensitivity S19 Video Input V/S = 5/2 0.45 – – VP–P Sync Separator Output Amplification u2 Video Input V/S = 5/2 4.3 – – VP–P u17–21 Pin12 High 20 – 40 mVP–P u21 Pin12 High 26 – 64 mVP–P Pin12 High, Pin18 Low 6.0 – 2.6 mVP–P u14–10 Pin12 Open 30 – 70 mVP–P u10 Pin12 Open 65 – 125 mVP–P EE Amp Gain G8–10 Pin12 High 9.7 – 11.6 dB VV Amp Gain u19–10 Pin12 Open 1.65 – 2.15 VP–P Chroma Amp Gain G12–10 5.3 – 8.8 dB EE/VV Crosstalk CT19–10 – – –40 dB Mute Crosstalk CT’19–10 Pin12 Low, Pin11 High – – –40 dB 4 – – V NL Limiter Gain NL Limiter Output Amplification NC Limiter Gain NC Limiter Output Amplification E y 4V EE/VV Changeover Sensitivity S12 FM Oscillation Carrier Interleave Dfo Pin12 High 5.9 – 9.9 kHz Du19−10 Pin12 Low 30 – 110 mV V Offset Note 1. Operating Supply Voltage Range: VCC = 4.5V to 5.5V. Pin Connection Diagram Sync Tip Level Detect Sync Output EE Level Adjust Video Signal Input During Recording AGC Detector Video Signal Input During Playback Sub Clamp Detector Sub Clamp Output GND EE/VV Output Dummy Sync Pulse Input PB Chroma Input Noise Canceller L.P.F. Noise Canceller H.P.F. Side Input 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 FM Output White Clip Level Adjustment Mod Mod Dark Clip Level Adjustment Mod Input FB Amp Input Main Emphasis Output VCC Main Clamp Input PG Input & 2/4/6 Hour Select Non–Linear Emphasis Sub–Side Input 12dB Amp Output 12dB Amp Input 28 15 1 14 1.120 (28.4) .338 (8.6) .200 (5.08) .070 (1.78) .130 (3.3) .400 (10.16)