ICs for VCR AN3275SB CM detection IC for VCRs in the North American market ■ Overview Unit: mm The AN3275SB is an IC which detects both a low luminance of video signal and a low sound amplitude based on that is ADLE Inc.'s patent of the CM detection technology. Using this IC and a free memory area in a microcomputer, you can easily carry out a CM detection for VCRs used in the North America. +0.10 15.2±0.3 0.2–0.05 19 1 18 0.5 8.4±0.3 11.93±0.3 36 ■ Features 1.30±0.25 1.30±0.25 0.3±0.11 0.8 Seating plane 0.1±0.1 2.85±0.2 • Video black detection • Low sound detection • Generation of various masking pulses (Detecting H-mask, V-mask and envelope) • Generation of the pulse (CLR pulse) for an event latch • Usable for COMMERCIAL ADVANCE, MOVIE ADVANCE and CA-LITE SSOP036-P-0450A ■ Applications • Stand-alone VCR ENVL DET 19 ENVH DET 20 VMD 21 VMW 22 23 VS OUT SYNC FIL 24 V DET 25 26 N.C. MA V LEV 27 28 MA V FIL CA V LEV 29 CA V FIL 30 CL CAP 31 C TRAP 32 33 34 V IN CA/MA SEL 35 36 GND ■ Block Diagram MA CA Counter Clamp LPF BP H mask Black video detect Amp. Clamp V-sync. sepa. Sync. sepa. MM3 H-DL MM4 H-WD V mask H mask LPF3 MM1 V-DL E/V mask E/V mask MM2 V-WID Audio 1 Latch 2 Non-audio detect Amp. 2 Video 1 Latch 2 V mask CA ENV mask MA Counter MA Mix. ENV detector CA Note) 18 17 ENV ADJ. 16 HSW IN 15 PB FM IN 14 ENV DET 13 CLR OUT 12 CLR IN 11 A DET 10 9 CA A LEV 8 CA A FIL 7 MA A FIL 6 MA V LEV 5 4 PA IN 3 RA IN 2 HMW VCC 1 E/V mask is a trademark registered by SRT, Inc., invented by Jerry Iggulden who closed a licensing contract under the cooperation of Arthur D. Little Enterprises, Inc. 1 AN3275SB ICs for VCR ■ Pin Descriptions Pin No. Symbol 1 VCC 2 HMW H-mask width period adjustment 3 RA IN Audio recording input 4 PA IN Audio playback input 5 A FIL Audio filter 21 VMD V-mask time delay adjustment 6 MA A LEV V-mask width period adjustment 7 Description Pin No. Symbol 19 ENV L DET Supply voltage (5 V typ.) MA A FIL CA A FIL 20 ENV H DET CA A LEV 10 A DC MOVIE ADVANCE audio 22 VMW detection level adjustment 23 VS OUT MOVIE ADVANCE audio 24 SYNC FIL 11 A DET Vertical sync. signal output Vertical sync. signal separation filter COMMERCIAL ADVANCE 25 V DET Black picture detection output to a microcomputer COMMERCIAL ADVANCE 26 N.C audio detection level adjustment 27 MA V LEV No connection MA video detection level adjustment Audio DC PB FM envelope peak detection (upper) audio filter 9 PB FM envelope peak detection (below) filter 8 Description Audio detection latch output 28 MA V FIL to a microcomputer 29 CA V LEV MA video filter control CA video detection level adjustment 12 CLR IN E/V mask pulse input 13 CLR OUT E/V mask pulse output 30 CA V FIL CA video filter control 14 ENV DET PB FM envelope detection filter 31 CL CAP Capacitor for clamping 15 PB FM IN PB FM envelope input 32 C TRAP Chroma trap filter 16 HEAD Head amp. switch pulse input 33 VIN 34 A REF 35 CA/MA SEL AMP SW 17 ENV ADJ. ENV mask level adjustment 18 V DET OUT Video detection delay adjustment Video input Audio reference Selection of CA, MA (CA-LITE) 36 GND Signal processing circuit GND ■ Absolute Maximum Ratings Parameter Supply voltage Supply current Power dissipation *2 Operating ambient temperature Storage temperature *1 *1 Symbol Rating Unit VCC 5.5 V ICC 35 mA PD 450 mW Topr −20 to +70 °C Tstg −55 to +125 °C Note) *1: Except for the power dissipation, operating ambient temperature, and storage temperature, all ratings are for Ta = 25°C. *2: The power dissipation shown is for the IC package at Ta = 70°C. 2 ICs for VCR AN3275SB ■ Recommended Operating Range Parameter Supply voltage Symbol Range Unit VCC 4.75 to 5.25 V ■ Electrical Characteristics at VCC = 5.0 V, Ta = 25°C Parameter Supply current Symbol ICC Conditions MA mode Min Typ Max Unit 21 28 mA CA mode hold voltage V35H 3.5 5.0 V CL SLP mode hold voltage V35M 1.75 3.0 V CL SP,MA mode hold voltage V35L 0 1.25 V Pin 32 output impedance R32 1 830 2 030 2 230 Ω Pin 5 output impedance R5 4 505 5 005 5 505 Ω VSS pulse high level V23H Outoput 23, with 10 kΩ to GND 4.0 V VSS pulse low level V23L Outoput 23, with 10 kΩ to VCC 0.5 V CLR pulse high level V13H Outoput 13, with 10 kΩ to GND 4.0 V CLR pulse low level V13L Outoput 13, with 10 kΩ to VCC 0.5 V Video det. output high level V25H Outoput 25, with 10 kΩ to GND 4.0 V Video det. output low level V25L Outoput 25, with 10 kΩ to VCC 0.5 V Audio det. output high level V11H Outoput 11, with 10 kΩ to GND 4.0 V Audio det. output low level V11L Outoput 11, with 10 kΩ to VCC 0.5 V Black det. level 1 (CA mode) *1 VDET1 Input 33, output 25 Video signal: 140IRE = 2.1 V[p-p] 10.5 13 15.5 (IRE) Black det. level 2 (CA mode) *1 VDET1 Input 33, output 25 Video signal: 140IRE = 2.1 V[p-p] 8.5 11 13.5 (IRE) Non-audio detection level 1 (CA mode) ADET1 Input 3, output 11 Pin 7: 47 kΩ to GND, fIN = 1.0 kHz 56 76 96 mV[p-p] Non-audio detection level 2 (MA mode) ADET2 Input 4, output 11 Pin 7: 47 kΩ to GND, fIN = 5 kHz 1.8 3.6 5.4 mV[p-p] Black detection adjustment range 1 *1 VAD1 Input 33, output 25, pin 29 = DC, sweep: 140 IRE = 2.1V[p-p] 7 28 (IRE) Black detection adjustment range 2 *1 VAD2 Input 33, output 25, pin 27 = DC, sweep: 140 IRE = 2.1V[p-p] 7 28 (IRE) Non-audio detection adjustment range 1 AAD1 Input 3, output 11 Pin 9 = DC, sweep, fIN = 1.0 kHz 50 100 mV[p-p] Non-audio detection adjustment range 2 AAD2 Input 4, output 11 Pin 6 = DC, sweep, fIN = 5 kHz 2.4 5.2 mV[p-p] V-mask delay tVD Input 33, output 13 Delay from VSS: 0.1 uF, pin 21: 0.1 µF 1.65 1.95 2.25 ms V-mask width tVW Input 33, output 13, pin 22: 0.22 µF 11 12.5 14 ms Note) *1: The unit which stands for the ratio of the video signal amplitude to a total amplitude. 140IRE = 2.1 V[p-p] 3 AN3275SB ICs for VCR ■ Electrical Characteristics at VCC = 5.0 V, Ta = 25°C (continued) Parameter Symbol Conditions Min Typ Max Unit H-mask delay tHD Input 33, output 30, delay from HSS 10.5 12.5 14.5 µs H-mask width tHW Input 33, output 30, pin 2: 2 700 pF 30 34 38 µs ENV detection level SE Input 15, output 13, VIN = 200 mV[p-p] − 5.5 − 7.5 − 9.5 dB • Design reference data Note) The characteristics below are theoretical values based on the IC design and are not guaranteed. Parameter Symbol Conditions Min Typ Max Unit VSY33 Input 33, output 33 Pin 33: 1.0 µF, 140IRE = 2.1 V[p-p] 1.8 V Chroma trap frequency characteristics fV2 Input 33, output 30 Ratio of pin 30 = 500 kHz to 3.58 MHz − 35 dB LPF2 frequency characteristics fV3 Input 33, output 30 Ratio of pin 30 = 500 kHz to 1.0 MHz − 3.0 dB Pin 30 output dynamic range *1 V30 Input 33, output 30 Pin 30: 10 kΩ to GND 30 (IRE) VPD30 Input 33, output 30 Pin 30: 10 kΩ to GND 1.6 V V28 Input 33, output 28 Pin 28: 10 kΩ to GND 30 (IRE) Pin 28 pedestal DC level VPD28 Input 33, output 28 Pin 28: 10 kΩ to GND 1.6 V Masking level DC offset ∆VPD Input 33, output 28 − 2.0 Pin 28: 10 kΩ to GND, pin 2 = GND 0.0 0.2 V Black detection hysteresis ∆VVCN Input 28, output 18 Pin 28 = triangular wave 105 130 155 mV[p-p] Black detection block Pin33 sync. DC level Pin 30 pedestal DC level Pin 28 output dynamic range *1 HSS,VSS block Sync. separation minimum input sensitivity SHSS Input 33, output 24 Pin 33: VIN = 2.1 V[p-p], white 100% 40 % HSS front edge delay tDHSS HSS front edge delay from input 33, output 24, pin 33 1.0 µs VSS front edge delay tDVSS Input 33, output 23 25 µs VSS pulse width tWVSS Input 33, output 23 215 µs Non-audio detection block LPF3 frequency characteristics fA1 Input 4, output 7 Ratio of pin 7 = 5 kHz to 15 kHz −3 dB Pin 7 output dynamic range ∆V7 Input 4, output 7 5.0 mV[p-p] Note) *1: The unit which stands for the ratio of the video signal amplitude to a total amplitude. 140IRE = 2.1 V[p-p] 4 ICs for VCR AN3275SB ■ Electrical Characteristics at VCC = 5.0 V, Ta = 25°C (continued) • Design reference data (continued) Note) The characteristics below are theoretical values based on the IC design and are not guaranteed. Parameter Symbol Conditions Min Typ Max Unit Envelope detection block EAD Input 15, output 13 VIN = pin 15, 200 mV[p-p] −3 +3 dB ∆VENON Input 15, output 13 VIN = pin 15, 200 mV[p-p] 1.7 dB ENV detection adjustment range ENV detection hysteresis SP ENV pulse front edge delay tDHSW Input 16, output 13 VIN = rectangular wave, 0 V to 5 V 300 Hz 0.4 µs SP ENV pulse width tWSHW Input 16, output 13 VIN = rectangular wave, 0 V to 5 V 300 Hz 570 µs ∆VHSON Input 16, output 13 VIN = triangular wave, 2 V[p-p] 300 Hz 80 mV[p-p] SP ENV pulse hysteresis ■ Terminal Equivalent Circuits Pin No. Equivalent circuit 1 VCC 2 HMW Impedance Signal waveform DC (V) 5.0 Current output 3.5 V 0V 2 200 Ω HSS HSS on 3 RA IN (CA) 10 kΩ 200 Ω 10 kΩ 2.3 Sin wave 3 5 AN3275SB ICs for VCR ■ Terminal Equivalent Circuits (continued) Pin No. 4 Equivalent circuit PA IN (MA, CL) Impedance Signal waveform 10 kΩ 200 Ω 10 kΩ DC (V) 2.3 Sin wave 4 5 5005 Ω A FIL 1.5 5 005 Ω 200 Ω 2 kΩ 5 6 MAALEV 21 kΩ DC 2.1 70 kΩ 6 200 Ω 30 kΩ 7 MAAFIL Current output i 200 Ω 0V 7 6 (R GND) ICs for VCR AN3275SB ■ Terminal Equivalent Circuits (continued) Pin No. 8 Equivalent circuit CAAFIL 80 kΩ Low at CA 9 Impedance Signal waveform DC (V) Tr-C DC CA 0 V MA open 19 kΩ DC 2.1 10 kΩ DC 2.8 8 20 kΩ CAALEV 75 kΩ 9 200 Ω 25 kΩ 10 A DC 10 kΩ 200 Ω 10 11 A DET Tr-C 11 7 AN3275SB ICs for VCR ■ Terminal Equivalent Circuits (continued) Pin No. 12 Equivalent circuit CLR IN Impedance Signal waveform DC (V) Tr-B 0 Tr-C 2.0 kΩ 1.0 20 kΩ 2.7 10 kΩ 200 Ω 12 500 Ω 30 kΩ 13 CLR OUT 13 14 ENVDET 2 kΩ 200 Ω 14 15 PB FM IN 200 Ω 20 kΩ 15 8 ICs for VCR AN3275SB ■ Terminal Equivalent Circuits (continued) Pin No. 16 Equivalent circuit HEAD AMP SW Impedance Signal waveform 11 kΩ 3 600 Ω DC (V) 1.3 200 Ω 8 400 Ω 16 17 ENV ADJ. 25 kΩ DC 2.7 45 kΩ 17 55 kΩ 18 V DET OUT Tr-B 0 200 Ω 3.3 18 70 kΩ 500 Ω 10 kΩ 7 pF MA on 19 ENV L DET 200 Ω 200 Ω 19 9 AN3275SB ICs for VCR ■ Terminal Equivalent Circuits (continued) Pin No. 20 Equivalent circuit ENV H DET 200 Ω Impedance Signal waveform DC (V) 200 Ω 1.8 Current output 200 Ω 20 21 VMD 3.5 V 0V 21 200 Ω VSS on VSS 22 VMW Current output 3.5 V 0V 22 200 Ω MMI on VSS 23 VS OUT Tr-C 23 10 ICs for VCR AN3275SB ■ Terminal Equivalent Circuits (continued) Pin No. 24 Equivalent circuit SYNC FIL 2 100 Ω Impedance Signal waveform DC (V) 2 100 Ω 1.5 Tr-C 200 Ω 24 25 V DET 25 26 N.C. 27 MA V LEV 25 kΩ DC 2.6 1 000 Ω DC Pedestal 1.8 47 kΩ 27 200 Ω 53 kΩ 28 MA V FIL 1 000 Ω 200 Ω 28 11 AN3275SB ICs for VCR ■ Terminal Equivalent Circuits (continued) Pin No. 29 Equivalent circuit CA V LEV Impedance Signal waveform DC (V) 25 kΩ DC 2.9 200 Ω DC Pedestal 1.8 Push-pull DC 3.0 49 kΩ 29 200 Ω 51 kΩ 30 CA V FIL 200 Ω 200 Ω 30 31 CL CAP 31 i 32 2 030 Ω CTRAP 2 030 Ω 32 12 200 Ω Sync. 1.8 ICs for VCR AN3275SB ■ Terminal Equivalent Circuits (continued) Pin No. 33 Equivalent circuit Impedance V IN Signal waveform Tr-E DC (V) Sync. 1.8 200 Ω 200 Ω 33 34 A REF (AUDIO reference) 25 kΩ DC 2.9 25 kΩ DC 2.5 43 kΩ 200 Ω 57 kΩ 34 35 CA/MA SEL 35 200 Ω 50 kΩ 10 kΩ 50 kΩ 36 GND 13 AN3275SB ICs for VCR ■ Reference • Description on COMMERCIAL ADVANCE: The COMMERCIAL ADVANCE technology is focused on detecting a black level existing between a program and a CM in the TV broadcasting in the North America and the rental video tapes so as to let a microcomputer recognize a CM part by its algorithm in order to skip the CM automatically. This IC is designed for a black level detection of a video signal and for no-sound detection. There are the following three modes in the CA technology: 1) COMMERCIAL ADVANCE mode Once a program is recorded in this mode, its CM part is automatically identified and is skipped from the next playback. First it identifies the CM in recording the program, then puts a mark on the CM position on the video tape so that the mark can be detected at the playback to erase the sound of the marked part and display a blue color on the TV screen. In the case that the tape not recorded in the commercial advance mode has been played back in this particular mode, the marking will be done and the commercial will be skipped from the next playback. 2) MOVIE ADVANCE mode The mode is used to play back the recorded rental video tape. You can automatically skip the commercials or commercial promotions (preview) placed before a movie start and can move to a movie starting point. In this mode, there are two modes available: one that skips all of a preview commercial and the other that stops skipping just before a preview commercial, so that you can make a choice when you want to watch a preview commercial. 3) CA-LITE mode In any programs recorded by either way, the VCR enters into a FORWARD SEARCH mode if a user presses the Skip button, and when a commercial is skipped, the skipping process stops automatically. Since the end of the commercial group is detected by software just after the last CM has passed, the VCR runs a reverse search for a short time then returns to a normal play mode and starts a program again. 14 ICs for VCR AN3275SB ■ Application Circuit Example • System example AN3275SB VCR microcontroller Video black detection Video To CLT head CA processor ROM, RAM A/D CLR pulse Microcontroller To survo/timer To front panel Low sound detection Sound Serial bus 19 0.1 µF ENVL DET ENVH DET 20 0.1 µF 0.1 µF 21 22 23 0.22 µF VMD VMW VS OUT SYNC FIL 24 25 N.C. 26 47 kΩ 27 28 0.01 µF V DET MA V LEV MA V FIL CA V LEV 47 kΩ 29 0.01 µF CA V FIL 30 CL CAP 31 32 0.1 µF 0.01 µF C TRAP 47 µF 39 pF V IN 2.1 V[p-p] 1.0 µF 33 34 35 36 2.2 µF CA/MA SEL GND • IC application circuit example MA CA Counter Clamp BP H mask Black video detect Amp. Clamp LPF V-sync. sepa. Sync. sepa. MM3 H-DL MM4 H-WD V mask H mask LPF3 MM1 V-DL E/V mask E/V mask MM2 V-WID Audio 1 Latch 2 Non-audio detect Amp. 2 Video 1 Latch 2 V mask CA ENV mask MA Counter MA Mix. ENV detector CA 18 CA 1 000 pF MA 17 ENV ADJ. 16 HSW IN 0.01 µF 39 kΩ 15 0.1 µF PB FM IN 14 ENV DET 1 000 pF 13 CLR OUT 12 CLR IN 10 11 A DET CA A LEV 47 kΩ CA A FIL 2.2 µF 9 8 0.1 µF 7 0.01 µF MA A FIL 6 MA V LEV 5 2 200pF 0.1 µF 4 PA IN 0.1 V[p-p] 3 0.1 µF 2 HMW RA IN 1.0 V[p-p] VCC 5 V typ. 2 700pF 1 E/V mask 15