BH7775K

Video ICs VCR audio signal processing system BH7775K The BH7775K is an audio signal processing system IC that includes a peak-noise reduction (PNR) processor, an FM modulator / demodulator circuit, an input / output switcher, an automatic FM detector circuit, an FM band-pass filter, a normal-audio circuit, a regulator circuit, and automatic adjusting circuits (VCO and BPF). •Applications recorders VHS Video cassette •Features off dual ± power supply which allows a 1) Operates 2) 3) large reduction in the number of coupling capacitors required. A built-in regulator makes it easy to construct a power supply system. A built-in 2-wire serial control decoder circuit allows serial control of the internal mode settings. Automatic adjusting VCO and BPF circuits that use the color signal subcarrier frequency (NTSC: 3.579545MHz and PAL: 4.433619MHz) ensure stable adjustment that is not effected by stress when the chip is mounted, or variations over time. 4-input switcher (turner, BS, and line 1 and 2). Output switch with built-in STEREO / LEFT / RIGHT switching, Hi-Fi / MIX / NORMAL switching, and BS monitor functions. The PNR processor and FM modulation / demodulation circuit provide reverse characteristics at record6) ing and playback. Also, carrier frequency adjustment and FM de-emphasis / playback level adjustment have been combined. Built-in FM band-pass filter connects directly to the playback amplifier and excels at attenuation of the other channel. The FM recording output circuit has a high-performance high-frequency cutoff filter that produces a sine wave output. Switching noise is reduced by a slope-control type differential compensation circuit. Built-in envelope detector circuit and noise-detecting automatic FM detector circuit. Built-in normal-audio signal processing circuit that allows SP / LP / EP equalizer switching. Control terminal provided for use with the BA7755AF high-voltage head switcher. 7) 8) 9) 4) 5) 1 Video ICs BH7775K •Absolute maximum ratings (Ta = 25°C) Parameter Symbol VCC Applied voltage Limits 23, 55 pin · · · · · · · · · · 6.0 59 pin · · · · · · · · · · · · – 6.0 7, 8, 22 pin · · · · · · · · · 6.5 Pin other than above · · · · 6.0 800∗ Unit V V V V mW °C °C VEE VIN VIN Power dissipation Operating temperature Storage temperature Pd Topr Tstg – 10 ~ + 70 – 55 ~ + 125 ∗ When IC is stand alone, reduced by 8.0mW for each increase in Ta of 1°C over 25°C. When mounted on a 90mm × 50mm, t = 1.6mm glass epoxy board, Pd = 1.3W (reduced by 13.0mW for each increase in Ta of 1°C over 25°C). Not designed for rediation resistance. •Recommended operating conditions (Ta = 25°C) Parameter Power supply voltage Power supply voltage Symbol UNREG-VCC UNREG-VEE Range + 7.0 ~∗ + 7.0 ~∗ Unit V V ∗ The built-in regulator in this IC outputs + 5.0V from pin 55, and - 5.0V from pin 59. The supply voltage range given above is the voltage to be applied to UNREG VCC and UNREG VEE pins in the measurement circuit to obtain regulator output. Therefore, the upper limit of the voltage range is set by the externally connected transistor that forms the regulator circuit, and not by the IC itself. Note, also, that the lower limit will change depending on the value of the resistor connected between the collector and base of the transistor. 2 Video ICs BH7775K •Block diagram NA REC OUT NA HEAD IN HEAD EQ 48 47 46 45 44 43 EQ 42 41 40 ALC 39 38 37 36 35 34 33 REC EQ NA REC FB MIX ALC MIX OUT LINE OUT R LINE OUT L Vcc ERP GND ERM VEE LINE1 R IN LINE1 L IN LINE2 R IN LINE2 L IN VREFP 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 NR EMPH R 32 Hi-Fi OUT R NA PB NFB NA PB OUT WTNG1 R Hi-Fi IN R NA PB IN NR TC R PB EQ NA ALC NA FB GNN WTNG2 R RECAMP REC EQ EQ PB DC FB R VCO f0 ADJ R DAC BF OUT R GNMR FM REC OUT AUDIO HEAD SW PULSE IN RHS CTRL FM ALC BPF f0 ADJ VCB MUTE CTRL FM PB IN GNML DAC BF OUT L VCO f0 ADJ L DC FB L PNR 31 30 29 28 27 26 25 AMP MIX AMP LINE AMP LINE AMP SW ATT MODEM OUTPUT SWITCH Hi-Fi DET REC D.O. COM. FM BPF 24 23 22 DATA DECODER MODEM ENVE LOPE 21 20 19 INPUT SWITCH PNR 18 17 1 BS R IN 2 BS L IN 3 TUNER R IN 4 TUNER L IN 5 TUNER M IN 6 GNDD 7 DATA 8 CLOCK 9 ENVE OUT / ADJ FLAG / Hi-Fi DET 10 FSC IN 11 Hi-Fi IN L 12 Hi-Fi OUT L 13 NR TC L 14 WTNG1 L 15 WTNG2 L 16 NR EMPH L 3 Video ICs BH7775K •Pin descriptions Pin function - 1 / 2 Pin No. 2, 1 4, 3, 5 6 7 8 9 10 11, 38 12, 37 13, 36 14, 35 15, 34 16, 33 17, 32 18, 31 19, 30 20, 29 21 22 23 24 25 26 27 28 Pin name Function BS input (L and R). TUNER input (L, R, and M). Serial control GND. Serial control data input. Serial control clock input. FM input Lch signal component envelope output. Hi-Fi DET output for FM input. ADJ FLAG output for ADJ. fsc input terminal for VCO and BPF adjustment. Hi-Fi input for output switcher. PNR audio output. PNR attack and recovery time setting. Attack R: 530Ω, recovery R: 6.5kΩ. Waiting characteristic low-frequency time constant setting Waiting characteristic high-frequency time constant setting NR emphasis time constant setting. (external C = 0.01µF) PNR operating reference potential. VCO control current setting terminal. VCO control DAC voltage output terminal . PNR, MODEM and BPF GND. L and R unconnected. Playback FM input. 660mVP-P Typ. No input coupling capacitor (GND to VCC). Line output mute control input. MODEM and BPF VCC. FM BPF center frequency adjustment. FM ALC time constant setting. High-voltage head switch (BA7755) control terminal. Audio head switching pulse input. EE: recording FM output. Sine wave output. PB: BPF output monitor terminal. Pin voltage I / O circuit BS IN L, R TUNER IN L, R, M GNDD DATA IN CLOCK IN ENVE OUT / Hi-Fi DET / ADJ FLAG FSC IN Hi-Fi IN L, R Hi-Fi OUT L, R NR TC L, R WTNG1 L, R WTNG2 L, R NR EMPH L, R DC FB L, R VCO f0 ADJ L, R VCO DAC BF OUT L, R GND (GNM) L, R FM PB IN MUTE CTRL VCB BPF f0 ADJ FM ALC RHS CTRL AHSWP IN FM REC OUT 0.0V 0.0V 0.0V — — EE: 0.8V PB: 1.0V 0.0V 0.0V 0.0V – 5.0V 0.0V 0.0V 0.0V 0.0V 2.5V 1.4V 0.0V 0.0V — 5.0V 1.9V 0.0V — — EE: 3.3V PB: 3.3V 69.8kΩ 47.0kΩ — B (PNP) B (PNP) EE: 50kΩ PB, ADJ: EF (NPN) 200kΩ 47kΩ EF: (P-P) — 10kΩ 1.1kΩ — 11.5kΩ EF (NPN) EF (NPN) — 50kΩ 3kΩ (2.5V Min.) — EF (NPN) ~ 200Ω EF (NPN) ~ 2.5kΩ C (NPN) B (PNP) EF (NPN) ~ 200Ω Note) I / O circuit; EF: emitter follower, P-P: push pull, B: base, and C: collector. All numerical values are standardized values. 4 Video ICs BH7775K Pin function - 2 / 2 Pin No. 39 40 41 42 43 44 45 46 47 48 49 50 51 52 54, 53 55 56 57 58 59 61, 60 63, 61 64 Pin name Function Normal line amplifier feedback. Normal line amplifier ALC time constant setting (attack and recovery time). Normal line amplifier playback input. Normal PB amplifier output. Normal PB amplifier equalizer switch. Normal PB amplifier feedback. Normal audio GND. Normal audio playback input. Head resonance equalizer switch terminal. Normal REC amplifier output. Recording equalizer setting resistor terminal. Normal REC amplifier feedback terminal. ALC time constant setting for mixer amplifier (attack and recovery time). Mixer amplifier output for RF converter. Line output VCC regulator. VCC regulator error output. Output switch, regulator GND. VEE regulator error output. VEE regulator LINE 1 input (L and R). LINE 2 input (L and R). VCC / 2 reference voltage. With power on detect and precharge function. Pin voltage I / O circuit NA FB NA ALC NA PB IN NA PB OUT PB EQ NA PB NFB GNN NA HEAD IN HEAD EQ NA REC OUT REC EQ NA REC FB MIX ALC MIX OUT LINE OUT L, R VCC ERP GND ERM VEE LINE1 IN L, R LINE2 IN L, R VREFP 0.0V 0.0V 0.0V 0.0V 0.0V 0.0V 0.0V 0.0V 0.0V 0.0V 0.0V 0.0V – 5.0V 0.0V 0.0V 5.0V 5.0V 0.0V – 5.0V – 5.0V 0.0V 0.0V 2.5V 800Ω EF (NPN) ~ 500Ω 105.2kΩ EF (P-P) ~ 50Ω OPEN / 25Ω B (NPN) — REC: B (NPN) REC: EF (P-P) 300kΩ / 29Ω EF: (P-P) 1kΩ B (NPN) EF (NPN) ~ 500Ω EF (NPN) 330Ω — C (NPN) — C (PNP) — 90.2kΩ 90.2kΩ 10kΩ ∗ I / O circuit; EF: emitter follower, P-P: push pull, B: base, and C: collector. All numerical values are standardized values. 5 Video ICs BH7775K •Input / Output circuits control and input / output circuits - (1) Equivalent circuits for the TUNER L, R, M (4, 3, 5pin) LINE1 L / R, LINE2 L / R (61, 60, 63, 62pin) Vcc – 2.0V 60.2k 4 [3, 5pin] 47k VEE GND 2.0V 61 [60, 63, 62pin] 2.0V 30k – 2.0V Vcc VEE GND BS L, R (2, 1pin) LINE OUT (54, 53pin) Vcc – 2.0V 22.8k 2 [1pin] 2.0V 47k VEE GND 25k Vcc 50 330 26k 10.13k 50 30k VEE GND [53pin] 54 MIX OUT (52pin) FM REC OUT (28pin) Vcc 200 200 52 5k 200 Vcc 200 28 8k VEE GND 47k 5p VEE GND 6 Video ICs Equivalent circuits for the control and input / output circuits - (2) FM PB IN (21pin) NA PB IN (41pin) BH7775K Vcc 3.5V 20p 2k 21 PB 12.5k 100k VEE GND 30k PB EE 75.2k 41 Vcc 50k VEE GND NA PB OUT (42pin) NA PB NFB (44pin), NA HEAD IN (46pin) Vcc 200 46 Vcc 50 200 42 44 100k VEE VEE GND NR REC OUT (48pin), NA REC NFB (50pin) Vcc 200 SP: ON 10k 50 39k 50k 200 VEE GND 48 7 Video ICs Equivalent circuits for the control and input / output circuits - (3) AUDIO HEAD SWITCH PULSE IN (27pin) ENVELOPE / Hi-Fi DET OUT (9 pin) BH7775K Vcc PB 200 30k 27 5k 50k VEE GND 30k 9 Vcc VEE GND RHS CTRL (26pin) MUTE CTRL (22pin) 26 Vcc 22 Vcc 5k 51k 10k 3k 200 2.5V 16k 50k VEE GND 10k VEE GND DATA (7pin), CLOCK (8pin) FSC IN (10pin) Vcc Vcc [7pin] 10k 8 3V VEE 10 2k 200k 50k VEE GND 8 Video ICs BH7775K •Electrical characteristics the following measurement conditions apply: • Unless otherwise noted, UNREG – VCC = + 10V UNREG – VEE = – 10V Ta = 25°C ∗ With regard to the control voltages, refer to the mode holding voltage range given in p.141. Output switch control (W1 bit 4, W1 bit 3 and W1 bit 2) BS Through control (W1 bit 1) LINE AMP gain (W3 bit 4 and W3 bit 3) FM output control (W2 bit 5) FM OUT switch control (W2 bit 4, W2 bit 3 and W2 bit 2) NTSC / PAL control (W2 bit 0) Recording MUTE (W2 bit 1) SP / EP control (W1 bit 5) FM detector level control (W4 bit 7, W4 bit 6) ENVE characteristic control (W4 bit 5, W4 bit 4) MUTE CTRL (pin 22) LINE MUTE (W1 bit 0) STEREO : OFF : Standard ( + 10.6dB) : FM output on : FM REC output MIX ration ( – 10.0dB) : NTSC : Recording MUTE : SP : Standard : FNORM detector, no ENVE output : L (MUTE) : L (MUTE) MODEM carrier frequency NTSC L channel 1.30MHz, PAL Lch 1.40MHz MODEM carrier frequency NTSC R channel 1.70MHz, PAL Rch1.80MHz Color signal subcarrier frequency NTSC 3.579545MHz, PAL 4.433619MHz Signal frequency f = 1kHz • Input condition 1 TU input VIN = – 20.0dBV, • Input condition 2 TU input VIN = – 10.6dBV, • Input condition 3 TU input VIN = – 15.0dBV, • Input condition 4 TU input VIN = – 5.0dBV, ∗ 1 B.W. = 0.4 to 30kHz ∗ 2 DIN AUDIO ∗ Refer to Fig. 1 for the measurement circuit. LINE1 / LINE2 input VIN = – 10.0dBV, LINE1 / LINE2 input VIN = – 0.6dBV, LINE1 / LINE2 input VIN = – 5.0dBV, LINE1 / LINE2 input VIN = + 5.0dBV, BS input VIN = – 16.0dB BS input VIN = – 6.6dB BS input VIN = – 11.0dB BS input VIN = – 1.0dB Parameter [REGULATOR] Quiescent Current (positive supply) EE Quiescent Current (positive supply) PB Quiescent Current (negative supply) EE Quiescent Current (negative supply) PB Regulator input voltage (+) Regulator input voltage (–) Symbol Min. Typ. Max. Unit Conditions Iqp EE Iqp PB IqM EE IqM PB VCC VEE 29.0 40.3 – 22.1 – 23.9 4.69 – 5.37 38.6 53.7 – 16.6 – 18.0 5.04 – 5.02 51.3 71.4 – 12.5 – 13.5 5.39 – 4.67 mA EE mode, no input, after carrier frequency adjustment. PB mode, no input, FNORM, BPF, after carrier frequency adjustment. EE mode, no input, after carrier frequency adjustment. PB mode, no input, FNORM, BPF, after carrier frequency adjustment. mA mA mA V V 9 Video ICs Parameter Symbol Min. Typ. Max. Unit Conditions BH7775K [Hi-Fi EE THROUGH] (INPUT: TU IN L / R, LINE1 IN L / R , LINE2 IN L / R, BS IN L / R OUTPUT: LINE OUT L / R) 〈MANUAL MODE〉 Line output level Channel balance (L / R) Distortion Maximum output level Output residual noise Crosstalk Muting level Switching DC offset VOEE CBEE THDEE VOMEE VONEE – 10.6 – 0.8 — 9.0 — — — — – 9.4 0.0 0.017 10.7 – 93.0 — – 105 8.0 – 8.2 0.8 0.10 — – 86.0 – 75.0 – 95 22 dBV dB % dBV dBV dBV dBV mV Input condition 1 Input condition 1 Input condition 1∗1 THD = 1%,∗1 Relevant input shorted to GND,∗2 Relevant input: shorted to GND Non-relevant input: Input condition2,∗2 Input condition 2∗2 (LINE OUT) ST / L / R / N, MIX ON / OFF Mode switching operating point voltage difference. CTEE MTEE ∆VMODE [BS THROUGH] (INPUT: BS IN L / R OUTPUT: LINE OUT L / R) Output level Distortion Output residual noise VOBS THDBS VONBS – 10.5 — — – 9.3 0.006 – 96.0 – 8.1 0.08 – 86.0 dBV % dBV VIN = – 16.0dBV VIN = – 16.0dBV,∗1 ∗2, Connect BS IN to GND. [LINE AMP] (INPUT: Hi-Fi IN L / R OUTPUT: LINE OUT L / R) Line amplifier gain 1 Line amplifier gain 2 Line amplifier gain 3 VOLINE1 VOLINE2 VOLINE3 + 10.0 + 11.2 + 13.1 + 10.6 + 11.8 + 13.7 + 11.2 + 12.4 + 14.3 dB dB dB VIN = – 20.0dBV VIN = – 20.0dBV VIN = – 20.0dBV [MIX AMP] (INPUT: TU IN L / R, LINE1 IN L / R, LINE2 IN L / R, BS IN L / R OUTPUT: MIX OUT) Output level Distortion MIX ALC level VOMIX THDMIX VALCMIX – 10.6 — – 4.4 – 9.4 0.08 – 2.9 – 8.2 0.50 – 1.4 dBV % dBV Input condition 1, simultaneous L & R input Input condition 1, simultaneous L & R input∗1 Input condition 2, simultaneous L & R input [NORMAL EE THROUGH] (INPUT: TU IN M, TU IN L / R, LINE1 IN L / R, LINE2 IN L / R, BS IN L / R OUTPUT: LINE OUT L / R) Output voltage level Distortion Output residual noise ALC level 1 ALC distortion VOEE THDEEN VONEEN VALCN1 THDALCN – 11.6 — — – 8.9 — – 10.4 0.039 – 81.5 – 7.4 0.045 – 9.2 0.10 – 71.3 – 5.9 0.15 dBV % dBV dBV % Input condition 1 Input condition 1,∗1 Rg = 1kΩ,∗2 Input condition 4 Input condition 4,∗1 [NORMAL REC AMP] (INPUT: TU IN M, TU IN L / R, LINE1 IN L / R, LINE2 IN L / R, BS IN L / R OUTPUT: NA REC OUT) Output voltage level Distortion Maximum output level Output level for EE VORECN THDRECN VOMRCN MTRECN – 9.6 — 7.0 — – 8.1 0.079 9.2 – 94.0 – 6.6 0.20 — – 70.0 dBV % dBV dBV Input condition 1 Input condition 1,∗1 THD = 1%,∗1, ALC OFF Input condition 2,∗2, EE MODE, ALC OFF 10 Video ICs Parameter Symbol Min. Typ. Max. Unit Conditions BH7775K [NORMAL PB AMP] (INPUT: NA HEAD IN, OUTPUT: LINE OUT) Output voltage level Distortion Output residual noise Open loop gain (PB PRE AMP) [EQ SWITCH] REC FB resistance SP REC FB resistance EP REC EQ resistance PB EQ SW impedance HEAD EQ SW impedance [RHS CONTROL] RHS control current RHS control leakage current [PNR ENCODE MODE] Encode output level Compression characteristic Encode distortion Output residual noise [PNR DECODE MODE] Output voltage level Expansion characteristic Time constant setting resistor VODEC EXP RDET – 11.2 – 52.4 5.10 – 9.4 – 50.2 6.15 – 7.6 – 48.0 7.20 dBV dB kΩ VIN = – 15.7dBV VIN = – 15.7dBV→ – 40.7dBV output level difference. Resistance value connected between pins 13 and 36 and VEE. (when VCCS and VEES applied) VOENC CMP THDEND VONEC – 17.0 – 26.4 — — – 15.7 – 24.7 0.17 – 56.5 – 14.4 – 23.0 0.37 – 51.5 dBV dB % dBV Input condition 1 TU input VIN = – 20dBV→ – 70dBV output level difference. Input condition 1,∗1 Connect the pertinent input to GND,∗2 IIN RHS IL RHS 98 — 118 — 140 1 µA µA RREC SP RREC SP RREC EQ REQ PB REQ HEAD 8.3 40.7 0.83 — — 10.0 49.0 1.00 25 29 11.7 57.3 1.17 50 50 kΩ kΩ kΩ Ω Ω SP MODE EP MODE Resistor connected between pin 49 and GND. SP MODE EP MODE VOPSN THDPBN VONPBN GVPBNOR – 13.4 — — 58.0 – 11.6 0.19 – 63.6 66.7 – 9.8 0.40 – 55.0 — dB % dBV dB VIN = – 70dBV VIN = – 70dBV,∗1 Rg = 1k Ω,∗2 VIN = – 70dBV OUTPUT: NA PB OUT 11 Video ICs Parameter Symbol Min. Typ. Max. Unit Conditions BH7775K [MODEM REC MODE] (INPUT: TUNER IN L / R, LINE1 IN L / R, LINE2 IN L / R, BS IN L / R, OUTPUT: FM REC OUT L / R) Carrier frequency NTSC Carrier frequency PAL Frequency deviation Maximum frequency deviation FM output level Lch Rch Lch Rch Lch Rch Lch Rch Lch Rch Lch Carrier 2nd harmonic Rch Lch Carrier 3rd harmonic Rch fNOL fNOR fPOL fPOR 1.2950 1.6950 1.3945 1.7935 45.5 45.0 116 116 320 325 — — — — – 12.0 1.3000 1.7000 1.4000 1.7990 51.5 51.0 138 138 365 370 – 53.0 – 48.0 – 52.0 – 55.0 – 10.2 1.3050 1.7050 1.4055 1.8045 57.5 57.0 160 160 420 425 – 40.0 – 40.0 – 40.0 – 42.0 – 8.4 MHz MHz MHz MHz ± kHz ± kHz ± kHz ± kHz mVP-P mVP-P dB dB dB dB dB Input condition 1 No input, VCC stable, after automatic adjustment fSC = 3.579545MHz VIN = 150 ~ 500mVP-P No input, VCC stable, after automatic adjustment fSC = 4.433619MHz VIN = 150 ~ 500mVP-P DEVL DEVR DEVMax.L DEVMax.R Input condition 4 (f = 10kHz) FM OUT SW: FM L mode FM OUT SW: FM R mode 2nd stage harmonics and fundamental harmonics spectral ratio Lch: FM L mode, Rch: FM R mode 3rd stage harmonics and fundamental harmonics spectral ratio Lch: FM L mode, Rch: FM R mode 1.3MHz / 1.7MHz spectrum ratio. VOFML VOFMR f2L f2R f3L f3R fLR FM MIX ratio (FM MIX1 mode) [MODEM PB MODE] (INPUT: FM PB IN, OUTPUT: LINE OUT L / R) Carrier frequency, after BPF fo adjustment, VIN = 660mVP-P, 1.30MHz, 1.70MHz MIX IN Demedulation output level Demedulation output level 2 Lch Rch Lch Rch Lch Demedulation distortion Demedulation SW noise level Demedulation noise level Rch Lch Rch Lch Rch VODL VODR VODL2 VODR2 THDDL THDDR VODSWL VODSWR VONDL VONDR – 11.5 – 11.5 VODL – 10.0 VODR – 10.0 — — — — — — – 9.3 – 9.3 VODL – 7.5 VODR – 7.5 0.12 0.13 — — – 95.0 – 95.0 – 7.1 – 7.1 VODL – 5.0 VODR – 5.0 0.35 0.35 — — – 85.0 – 85.0 dBV dBV dBV dBV % % dBV dBV dBV dBV DEVL = ± 50.0kHz, f = 1kHz DEVR = ± 50.0kHz, f = 1kHz DEVL = ± 50.0kHz, f = 10kHz DEVR = ± 50.0kHz, f = 10kHz DEVL = ± 50.0kHz, f = 1kHz,∗1 DEVR = ± 50.0kHz, f = 1kHz,∗1 f = 10kHz, AUDIO H. SW. P = – Hz 5VP-P rectangular-waveform input. After 10kHz TRAP passes DEV. = ± 25.0kHz∗2 ∗2 Unmodulated [Recording→ playback total characteristics] (EE · · · INPUT: LINE IN L / R, OUTPUT: LINE OUT L / R) (PB · · · INPUT: FM PB IN, OUTPUT: LINE OUT L / R) Line output recording / playback level difference Lch Rch VRPL VRPR – 1.2 – 1.2 0.0 0.0 + 1.2 + 1.2 dB dB EE mode: VIN = – 10.0dBV after carrier frequency adjustment. PB mode: Input FM PB IN = 660mVP-P, f = 1.30MHz, 1.70MHz 1: 1 MIX, after BPF center frequency adjustment. Inpu DEV = DEVL,R (frequency deviation given above). EE / PB line out level difference. 12 Video ICs Parameter Symbol ∆VBPFN ∆VBPFP Min. Typ. Max. Unit Conditions BH7775K [FM BPF] (INPUT: FMPB IN, OUTPUT: BPF MONITOR L / R) VCC stable, after automatic adjustment BPF L / R level difference NTSC BPF L / R level difference PAL 〈NTSC Lch〉 1.30MHz insertion loss 1.15MHz attenuation 1.45MHz attenuation 1.70MHz attenuation 〈NTSC Rch〉 1.70MHz insertion loss 1.55MHz attenuation 1.85MHz attenuation 1.30MHz attenuation 〈PAL Lch〉 1.40MHz insertion loss 1.25MHz attenuation 1.55MHz attenuation 1.80MHz attenuation 〈PAL Rch〉 1.80MHz insertion loss 1.65MHz attenuation 1.95MHz attenuation 1.40MHz attenuation ATTPRC ATTPR 1.65 ATTPR 1.95 ATTPR 1.40 – 14.8 — — — – 11.6 ATTPRC – 4.6 ATTPRC – 5.3 — – 8.6 — — ATT PRC – 30.0 dB dB dB dB 1.40MHz + 1.80MHz 1.65MHz + 1.40MHz 1.95MHz + 1.40MHz 1.40MHz + 1.80MHz ATTPLC ATTPL 1.25 ATTPL 1.55 ATTPL 1.80 – 1.28 — — — – 9.7 ATT PLC – 5.0 ATT PLC – 5.2 — – 6.7 — — ATTPLC – 30.0 dB dB dB dB 1.40MHz + 1.80MHz 1.25MHz + 1.80MHz 1.55MHz + 1.80MHz 1.40MHz + 1.80MHz ATTNRC ATT NR 1.55 ATTNR 1.85 ATTNR 1.30 – 15.5 – 12.3 – 9.3 dB dB dB dB 1.30MHz + 1.70MHz 1.55MHz + 1.30MHz 1.85MHz + 1.30MHz 1.30MHz + 1.70MHz ATTNLC ATTNL 1.15 ATTNL 1.45 ATTNL 1.70 – 14.2 ATT NLC – 9.5 ATT NLC – 8.6 — – 11.1 ATTNLC – 5.0 ATTNLC – 5.0 — – 8.1 ATTNLC – 2.0 ATTNLC – 2.0 ATT NLC – 30.0 dB dB dB dB 1.30MHz + 1.70MHz 1.15MHz + 1.70MHz 1.45MHz + 1.70MHz 1.30MHz + 1.70MHz – 5.0 – 5.0 0.0 0.0 5.0 5.0 dB dB f = 1.505MHz, VIN = 200mVP-P f = 1.605MHz, VIN = 200mVP-P 〈LcH, RcH mix input signal〉 660mVP-P (RATIO 1: 1), FM ALC ON ATTNRC A TTNRC ATTNRC – 8.3 – 4.7 – 1.9 ATTNRC A TTNRC ATTNRC – 10.6 – 5.4 – 1.6 — — ATTNRC – 30.0 13 Video ICs Parameter [DO detect circuit] DO detector level VDDO 77.0 83.0 89.0 dBµ Symbol Min. Typ. Max. Unit Conditions BH7775K Input level to give DO due to attenuation. [FNORM to Hi-Fi return delay circuit] τFNDLY FM PB IN (1.3MHz, 1.7MHz, 1: 1 MIX) time from 660mVP-P input to ENVE OUT rise. Audio head pulse in: f = 30Hz, 5VP-P rectangular waveform. Return delay time 110 125 140 ms [Envelope output circuit] (INPUT: FM PB IN, OUTPUT: ENVE OUT) 0dB = 660mVP-P, 1.3MHz & 1.7MHz MIX IN Envelope output level SP0 Envelope output level SP1 Envelope output level SP2 Envelope output level EP1 Hi-Fi DET output DC FNORMAL Hi-Fi DET output DC HiFi [Hold pulse circuit] Audio head switch pulse threshold voltage Hold pulse width 〈CLOCK IN〉 L mode holding voltage H mode holding voltage 〈DATA IN〉 L mode holding voltage H mode holding voltage MUTE CTRL MUTE holding voltage DC MUTE holding voltage VH22L VH22H 0.0 3.9 — — 1.0 VCC V V VH7L VH7H 0.0 2.5 — — 0.5 VCC V V VH8L VH8H 0.0 2.5 — — 0.5 VCC V V VTHHOLD ∆τHOLD 1.66 6.47 2.66 7.77 3.66 9.07 V Hysteresis (0.5V) VENVSP0 VENVSP1 VENVSP2 VENVEP1 VHDETL VHDETH — 2.22 3.70 2.18 — 3.50 0 2.72 3.95 2.68 0 4.00 100 3.22 4.20 3.18 100 — mV V V V mV V No signal, SP MODE VIN = 0dB, SP MODE VIN = + 10dB, SP MODE VIN = – 4dB, EP MODE No signal VIN = 0dB µs [Voltage for preserving the control system mode] 14 22µ 330 NAME AOIN NAME COUI 1k 500 0.01µ 330k 12k 100µ 0.2k 3.3µ 10µ 36 33µ ALC 32 PNR 31 30 47k MODEM LINE AMP LINE AMP Hi-Fi DET OUTPUT SWITCH 27 10k 26 25 25.3k FM BPF 24 23 22 MODEM ENVE LOPE 21 20 19 47k PNR 18 17 33µ 50 MUTE CTRL FM PB IN D.O. COM. A 0.022µ 28 29 0.01µ FM REC OUT 27k 35 34 33 38 37 42 41 40 39 0.1µ 33µ 1M VEE 4.7µ 0.01µ 0.022µ VEE Video ICs •Measurement circuit 22k A 48 EQ 49 50 51 AMP MIX AMP SW ATT 47µ 52 53 54 RECAMP REC EQ EQ PB 47 46 45 44 43 V 500 V 0.01µ 1200p 2.2M VEE 22k MIX OUT LINE OUT R 1500p 1500p LINE OUT L 22k 10k AUDIO HEAD SWITCH PULSE IN VCC REC 22k 55 100µ 56 57 58 V A Fig.1 59 100µ 60 DATA DECODER 61 62 63 64 4.7µ 1 2 3 4 5 6 7 8 9 10 11 12 13 10µ 3.3µ VEE 4.7µ 1k DATA FSCIN CLOCK UNREG VCC UNREG VEE 4.7k A 4.7k VEE LINE1 R IN VEE V 4.7k LINE1 L IN 1k 4.7k 27k LINE2 R IN INPUT SWITCH 1k 4.7k LINE2 L IN 1k 4.7k 1k 14 15 16 BS R IN 4.7k BS L IN 1k 4.7k TUNER R IN 1k Hi-FiINL 47k V 4.7k 0.01µ 0.022µ TUNER L IN 1k 4.7k TUNER M IN 1k BH7775K 4.7k 15 1k ENVEOUT/ADJFLAG Hi-FiDET •Application example 16 22µ VEE 0.01µ 100µ 1M 33µ 10µ 37 33µ ALC 32 PNR 31 47k 27k 51 AMP SW ATT MODEM LINE AMP LINE AMP Hi-Fi DET 26 25 D.O. COM. FM BPF 24 25.3k 23 22 MODEM DATA DECODER ENVE LOPE 21 20 19 47k PNR MIX AMP Video ICs BA7755 BIAS OSC EQ 49 50 30 29 28 27 RECAMP REC EQ EQ 0.01µ PB 1200p 8765 1234 330 VEE 3.3µ 4.7µ 0.01µ 0.022µ 330k 12k 0.1µ 48 47 46 45 44 8.2k 43 42 41 40 39 38 36 35 34 33 2.2M VEE 52 53 54 55 56 57 58 59 60 61 62 63 64 4.7µ 1 2 3 4 5 6 7 8 9 10 11 12 13 10µ 3.3µ P/R CTRL MIX OUT OUTPUT SWITCH 47µ LINE R OUT 1500p FM REC OUT AUDIO HEAD SWITCH PULSE IN LINE L OUT 1500p VCC REC 100µ UNREG VCC 0.022µ Fig.2 INPUT SWITCH 14 15 16 VEE 4.7µ 0.01µ 0.022µ 4.7k 22k UNREG VEE 4.7k VEE 100µ MUTE CTRL FM PB IN LINE1 R IN 4.7k LINE1 L IN 4.7k 27k LINE2 R IN 4.7k LINE2 L IN 18 17 33µ 4.7k 4.7k BS R IN 4.7k BS L IN TUNER R IN TUNER L IN FSCIN ENVELOPE/Hi-Fi DET OUT/ADJ FLAG CLOCK DATA BH7775K TUNER M IN Video ICs BH7775K •Electrical characteristic curve –5 – 10 – 15 GAIN: GV (dB) – 20 – 25 – 30 – 35 – 40 – 45 – 50 – 55 0.75 0.90 1.05 1.20 1.35 1.5 1.65 1.80 1.95 2.10 2.25 FREQUENCY: f (MHz) Lchannel Rchannel Fig. 3 FM BPF frequency characteristics (NTSC) •External dimensions (Units: mm) 16.4 ± 0.3 14.0 ± 0.2 48 33 49 16.4 ± 0.3 14.0 ± 0.2 32 64 1 2.7 ± 0.1 17 16 0.15 ± 0.1 0.05 0.8 0.35 ± 0.1 0.15 QFP-A64 0.5 17