View BH7779K_332716.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

Video ICs
VCR audio signal processing system
BH7779K
The BH7779K is an audio signal processing system IC that includes a peak-noise reduction processor, an FM modulator / demodulator circuit, an input / output switcher, an automatic FM detector circuit, an FM band-pass filter, a normal-audio circuit and a regulator circuit.
*Applications recorders VHS Video cassette *Features signal prosessing system IC that (Hi-Fi and 1) An audio
normal audio) includes a peak-noise reduction (PNR) prosessor, an FM modulator / demodulator circuit, an input output switcher, an automatic FM detector circuit, an FM band-pass filter, a normalaudio circuit and a regulator circuit. 2) Operates off dual power supply which allows a large reduction in the number of coupling capacitors required. A built-in regulator makes it easy to construct a power supply system. 3) A built-in two-line serial control decoder circuit allows serial control of the internal mode settings. 4) Four-input switcher (turner, BS, and line 1 and 2). The output switcher switches between STEREO / LEFT / RIGHT and Hi-Fi / MIX / NORMAL, and a BS monitor function is provided. 5) The PNR processor and FM modulation / demodulation circuit povide reverse characteristics at recording and playback. Also, carrier frequency adjustment and FM de-emphasis / playback level adjustment have been combined. 6) 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. 7) Switching noise is reduced by a slope-control type differential compensation circuit. 8) Built-in envelope detector circuit and noise-detecting automatic FM detector circuit. 9) Built-in normal-audio signal processing circuit that allows SP / LP / EP equalizer switching. Control terminal provided for use with the BA7755AF higi-voltage head switcher.
1
Video ICs
BH7779K
*Absolute maximum ratings (Ta=25C)
Parameter Symbol VCC
Applied voltage
Limits 23, 55pin******************************6.0 59 pin******************************* - 6.0 6, 8, 9 pin*****************************6.5
Other than the pins above: 6.0V 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 1C over 25C. When
mounted on a 90mm x 50mm, t = 1.6mm glass epoxy board, Pd = 1.3W (reduced by - 13.0mW for each increase in Ta of 1C over 25C).
*Recommended operating conditions (Ta = 25C)
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 power supply
voltage 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 power supply voltage 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
BH7779K
*Block diagram
NA REC OUT NA HEAD IN NA PB OUT NA PB NFB NA PB IN HEAD EQ Hi-Fi R IN Hi-Fi R OUT Hi-Fi L OUT Hi-Fi L IN NR TC R 34 NA ALC PB EQ NA FB GNN WTNG R 33
48
47
46
45
44
43 EQ
42
41
40
39
38
37
36
35
REC EQ SW 49 NA REC NFB 50 MIX ALC 51 MIX OUT 52 LINE R OUT 53 LINE L OUT 54 VCC 55 ERP 56 GND 57 ERM 58 VEE 59 LINE1 R IN 60 LINE1 L IN 61 LINE2 R IN 62 LINE2 L IN 63 Vref 64
RECAMP REC EQ
EQ
PB
ALC PNR AMP SW AII
32 NR EMPH R 31 DC FB R 30 VCO f0 adj R 29 GNMR 28 FM REC OUT 27 Hi-Fi DET AUDIO HEAD SWICTH PULSE IN
MIX AMP LINE AMP LINE AMP
MODEM OUTPUT SWITCH
26 RHS CTRL 25 FM ALC
REG D.O. COM. FMBPF
24 BPF f0 adj 23 VCB 22 GNB
DATA DECODER
MODEM
ENVE LOPE
21 FM PB IN 20 GNML 19 VCO f0 adj L
INPUT SWITCH
PNR
18 DC FB L 17 NR EMPH L
1 TUNER R IN
2 TUNER L IN
3 TUNER M IN
4 BS R IN
5 BS L IN
6 MUTE CTRL
7 GNDD
8 DATA
9 CLOCK
10 ENVE OUT
11 INSW R OUT
12 PNR R IN
13 INSW L OUT
14 PNR L IN
15 NR TC L
16 WTNG L
3
Video ICs
BH7779K
*Pin descriptions
Pin function - 1 / 3 Pin No. 2, 1, 3 5, 4 6 7 8 9 10 13, 11 14, 12 15, 34 16, 33 17, 32 18, 31 19, 30 20, 29 21 22
Pin name Function TUNER input (L, R, and M). BS input (L and R). Line output mute control input. Serial control GND. Serial control data input. Serial control clock input. FM input Lch signal component envelope output. Input SW output. PNR audio input. PNR attack and recovery time setting. Attack R: 530, recovery R: 6.5k. Waiting characteristic high-frequency time constant setting. NR emphasis time constant setting. (external C = 0.01F, R = 18k, 5.6k) PNR operating reference potential. VCO control current setting terminal. PNR and MODEM GND. Both L and R unconnected. Playback FM input. 660mVP-P Typ. No input coupling capacitor (GND to VCC). FM BPF GND. Pin voltage I / O circuit
TUNER IN L, R, M BS IN L, R MUTE CTRL GNDD DATA IN CLOCK IN ENVE OUT INPUTSWOUT L, R PNR IN L, R NR TC L, R WTNG L, G NR EMPH L, R DC FB L, R VCO f0 ADJ L, R GND (GNM) L, R FM PB IN GND (GNB)
0.0V 0.0V -- -- -- -- EE: 0.8V PB: 1.0V 0.0V 0.0V - 5.0V 0.0V 0.0V 0.0V 2.5V 0.0V 0.0V 0.0V
32.7k 93.5k 3k (more 2.5V) -- B (PNP) B (PNP) EE: 50k PB: EF (NPN) EF: (P - P) 50k -- -- -- 11.5k EF(NPN) -- 33k --
I / O circuit; EF: emitter follower, P-P: push pull, B: base, and C: collector. All numerical values are standardized values.
4
Video ICs
Pin function - 2 / 3
Pin No. 23 24 25 26 27 28 37, 35 38, 36 39 40 41 42 43 44 45
Pin name Function MODEM and BPF VCC. BPF center frequency adjustment. FM ALC time constant setting. High-voltage head switch control (BA7755). Audio head switching pulse input. EE: recording FM output. Sine wave output. PB: BPF output monitor. PNR audio output. Hi - Fi input for output switcher. Normal line amplifier feedback. Normal line amplifier ALC time constant setting. Attack and recovery time setting. Normal line amplifier playback input. Normal PB amplifier output. Normal PB amplifier equalizer switch. Normal PB amplifier feedback. Normal audio GND. Pin voltage
BH7779K
I / O circuit
VCB BPF f0 ADJ FM ALC REC HSW CTRL AHSWP IN FM REC OUT Hi-Fi OUT L, R Hi-Fi IN L, R NA FB NA ALC NA PB IN NA PB OUT PB EQ NA PB NFB GNN
5.0V 1.9V 0.0V -- -- EE: 3.3V PB: 3.3V 0.0V 0.0V 0.0V 0.0V 0.0V 0.0V 0.0V 0.0V 0.0V
-- EF (NPN) ~ 200 EF (NPN) ~ 2.5k C (NPN) B (PNP) EF (NPN) ~ 200 EF: (P - P) 47k 800 EF (NPN) ~ 500 100k EF (P - P) ~ 50 OPEN / 22 B (NPN) --
I / O circuit; EF: emitter follower, P-P: push pull, B: base, and C: collector.
All numerical values are standardized values.
Pin function - 3 / 3
Pin No. 46 47 48 49 50 51 52 54, 53 55 56 57 58 59 61, 60 63, 62 64
Pin name Function Normal audio playback input. Head resonance equalizer switch. Normal REC amplifier output. Recording equalizer switch. Normal REC amplifier feedback. ALC time constant setting for mixer amplifier Attack and recovery time setting. Mixer amplifier output for RF converter. Line output VCC regulator. VCC regulator error output. Input / output switch 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 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
- 5.0V
REC: B (NPN) REC: EF (PNP) 300k / 28 EF: (P - P) 100k / 22 B (NPN) EF (NPN) ~ 500 EF (NPN) 330
--
0.0V 0.0V 5.0V 5.0V 0.0V
- 5.0V - 5.0V
C (NPN)
--
C (PNP)
--
0.0V 0.0V 2.5V
93.5k 93.5k 10k
I / O circuit; EF: emitter follower, P-P: push pull, B: base, and C: collector. All numerical values are standardized values.
5
Video ICs
BH7779K
*Input / Output circuits control and input / output circuits - (1) Equivalent circuits for the
TUNER L, R, M (2, 1 ,3pin) LINE1 L / R, LINE2 L / R, BS L / R (61, 60, 63, 62, 5, 4pin)
VCC - 2.0V
VCC - 2.0V
2 (1 ,3pin)
22.7k 61 10k 2.0V (60, 63, 62, 5, 4pin)
63.5k
30k
2.0V
VEE GND
VEE GND
LINE OUT L, R (54, 53pin)
MIX OUT (52pin)
VCC 50 200 52 20k 330 26k 8.5k 50 30k 200
VCC
54 (53pin)
5k
47k
VEE VEE GND GND
FM REC OUT (28pin)
FM BP IN (21pin)
VCC
VCC
3.5V 200 200 50k 20p PB 5p 8k VEE GND 12.5k 100k 2k
28
21
VEE GND
6
Video ICs
Equivalent circuits for the control and input / output circuits - (2)
BH7779K
NA PB IN (41pin)
NA PB OUT (42pin)
VCC 200
VCC
41 49.5k 40k PB EE 200 VEE GND 56
42
VEE
NA PB NFB (44pin) ,NA HEAD IN (46pin)
NA REC OUT (48pin) ,NA REC NFB (50pin)
VCC 200 46
VCC
49k 44 50 100k VEE GND 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 (10pin)
BH7779K
VCC PB 200 30k 5k 50k 30k 10
VCC
27
VEE GND
VEE GND
RHS CTRL (26pin)
MUTE CTRL (6pin)
26 VCC
6 VCC
5k
51k 10k 3k
200
2.5V
16k 50k VEE GND 10k
VEE GND
DATA (8pin) , CLOCK (9pin)
VCC
(8pin) 9 10k 3V
VEE
8
Video ICs
BH7779K
*Electrical characteristics the following measurement conditions apply: * Unless otherwise noted,
UNREG - VCC = + 10V UNREG - VEE = - 10V Ta = 25C
With regard to the control voltages, refer to the mode holding voltage range given in p. 185.
* Output switch control (W1D2, W1D3 and W1D4) * BS through control (W3D7) * LINE AMP gain (W2D1 and W2D2) * FM output control (W4D1) * FM OUT switch control (W4D2, W4D3 and W4D4) * NTSC / PAL control (W2D6) * Recording mute (W1D6) * SP / EP control (W1D7) * FM detector level control (W2D3, W2D4) * ENVE characteristic control (W2D5) * FM TEST control (W4D5) * FM ALC control (W4D6) * MUTE CTRL (pin 6) Signal frequency f = 1kHz MODEM carrier frequency NTSC Lch 1.30MHz MODEM carrier frequency NTSC Rch 1.70MHz MODEM carrier frequency PAL Lch 1.4MHz MODEM carrier frequency PAL Rch 1.8MHz : STEREO : OFF : Standard ( + 10.3dB) : FM output on : FM REC output MIX ration ( - 13.5dB) : NTSC : recording MUTE : SP : standard : FNORM detector, no ENVE output : OFF : ALC ON : L (MUTE)
1 B.W. = 0.4 to 30kHz 2 DIN AUDIO Refer to Fig. 1 for the measurement circuit.
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
26.0 36.4
34.7 48.6
46.3 64.8
mA mA mA mA V V
EE mode, no input, standard carrier adjustment resistor. PB mode, no input, FNORM, BPE, standard carrier adjustment resistor. EE mode, no input, standard carrier adjustment resistor. PB mode, no input, FNORM, BPE, standard carrier adjustment resistor.
- 20.1 - 15.1 - 11.3 - 21.6 - 16.2 - 12.1 4.69 5.04 5.39
-- --
- 5.37 - 5.02 - 4.67
9
Video ICs
Parameter MANUAL MODE
Line output level Channel balance (L / R) Distortion Maximum output level Output residual noise Crosstalk Muting level Switching DC offset
BH7779K
Symbol Min. Typ. Max. Unit Conditions
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)
VOEE CREE THDEE VOMEE VONEE CTEE MTEE VMODE
- 11.0 - 0.8 -- 8.3 -- -- -- --
- 9.8 0.0 0.017 10.7 - 94.0 - 93.0 - 105 8.0
- 8.6 0.8 0.10 -- - 85.0 - 78.0 - 95 30
dBV dB % dBV dBV dBV dBV mV
VIN = - 9.7dBV VIN = - 9.7dBV VIN = - 9.7dBV,1 THD = 1%,1
Connect the pertinent input to GND.2 VIN = 0.0dBV for the non-relevant tarminal, relevant terminal shorted to GND.2
VIN = 0.0dBV,2 (LINE OUT) ST / L / R / N, MIX ON / OFF Mode switching operating point voltage difference.
BS THROUGH (INPUT: BS IN L / R OUTPUT: LINE OUT L / R)
Output level Distortion Output residual noise
VOBS THDBS VONBS
- 10.9 -- --
- 9.7 0.005 - 99.0
- 8.5 0.08 - 87.0
dBV % dBV
VIN = - 9.7dBV VIN = - 9.7dBV,1
Connect BS IN to GND.2
LINE AMP (INPUT: Hi-Fi IN L / R OUTPUT: LINE OUT L / R)
Line amplifier gain 1
VOLINE1
+ 9.3
+ 10.3 + 11.3
dB
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
- 11.7 -- - 4.9
- 9.7 0.08 - 2.9
- 7.7 0.50 - 0.9
dBV % dBV
VIN = - 9.7dBV, simultaneous L & R input VIN = - 9.7dBV, simultaneous L & R input1 VIN = 0.0dBV, 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
- 11.3 - 10.1 -- -- - 8.5 -- 0.045 - 80.0 - 7.0 0.040
- 8.9 0.10 - 70.0 - 5.5 0.15
dBV % dBV dBV %
VIN = - 9.7dBV VIN = - 9.7dBV,1 Rg = 1k,2 VIN = - 5.0dBV VIN = - 5.0dBV,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 - 11.4 - 10.2 THDRECN VOMRECN MTRECN -- 7.0 -- 0.067 9.3 - 99.0
- 9.0 0.20 -- - 70.0
dBV % dBV dBV
VIN = - 9.7dBV VIN = - 9.7dBV,1 THD = 1%,1 , ALC OFF VIN = 0.0dBV,2 , EE MODE ALC OFF
10
Video ICs
Parameter Symbol Min. Typ. Max. Unit Conditions
BH7779K
NORMAL PB AMP (INPUT: NA HEAD IN, OUTPUT: LINE OUT)
Output voltage level Distortion Output residual noise Open loop gain (PB PRE AMP)
VOPBN THDPBN VONPBN GVPBNOR
- 11.9 - 10.1 -- -- 58.0 0.15 - 61.5 65.5
- 8.3 0.40 - 53.0 --
dB % dBV dB
VIN = - 70dBV VIN = - 70dBV,1 Rg = 1k,2 VIN = - 70dBV OUTPUT: NA PB OUT
EQ SWITCH
REC EQ SW impedance PB EQ SW impedance HEAD EQ SW impedance
REQ REC REQ PB REQ HEAD
-- -- --
22 25 29
40 50 50
A A
SP MODE SP MODE EP MODE
RHS CONTROL
RHS control current RHS control leakage current
IIN RHS IL RHS
98 --
118 --
140 1
-- --
PNR ENCODE MODE
Compression characteristic Encode distortion Output residual noise
CMP THDEND VONENC
-- -- --
- 24.6 0.17 - 56.5
-- -- --
dB % dBV
Input VIN = - 9.7dBV - 59.7dBV output level difference.
VIN = - 9.7dBV,1
Connect the pertinent input to GND.2
PNR DECODE MODE
Expansion characteristic Time constant setting resistance value
EXP RDET
-- 5.10
- 50.3 6.15
-- 7.20
dB k
VIN = - 15.5dBV - 40.5dBV output level difference. Resistance value connected between pins 15 and 34 and VEE. (when VCCS and VEES applied)
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 setting resistance value Frequency deviation Maximum frequency deviation FM output level
Lch Rch Lch Rch Lch
ROL ROR DEVL DEVR DEVMax.L
12.5 9.5 46.2 46.6 125 125 325 335 -- -- -- --
15.0 11.5 52.2 52.6 147 147 370 380 - 53.0 - 48.0 - 52.0 - 55.0
17.5 13.5 58.2 58.6 169 169 425 435 - 40.0 - 40.0 - 40.0 - 42.0 - 11.7
k
No input
k kHz kHz kHz kHz mVP-P mVP-P dB dB dB dB dB VIN = - 9.7dBV
VIN = + 5.0dBV (f = 10kHz)
FM OUT SW: FM L mode FM OUT SW: FM R mode 2nd stage harmonics and fundamental harmonics spectrum ratio Lch: FM L mode, Rch: FM R mode 3rd stage harmonics and fundamental harmonics spectrum ratio Lch: FM L mode, Rch: FM R mode 1.3MHz / 1.7MHz spectrum ratio.
Rch DEVMax.R Lch Rch Lch Rch VOFML VOFMR f2L f2R f3L f3R fLR
Carrier 2nd harmonic
Carrier 3rd harmonic
Lch Rch
FM MIX ratio (FM MIX1 mode)
- 15.7 - 13.7
11
Video ICs
Parameter Symbol Min. Typ. Max. Unit Conditions
BH7779K
MODEM PB MODE (INPUT: FM PB IN, OUTPUT: LINE OUT L / R) Carrier setting resistance, after BPF f0 adjustment, VIN = 660mVP-P, 1.30MHz, 1.70MHz MIX IN
Demodulation output level
Lch Rch Lch Rch
VODL VODR VODL2 VODR2 THDDL THDDR VODSWL VODSWR VONDL VONDR
- 12.7 - 12.7 VODL - 9.6 VODR - 9.6 -- -- -- -- -- --
- 10.7 - 10.7 VODL - 7.4 VODR - 7.4 0.12 0.13 -- --
- 8.7 - 8.7 VODL - 5.2 VODR - 5.2 0.35 0.35 -- --
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 = 30Hz, 5VP-P rectangular-waveform input. After 10kHz TRAP passes DEV. = 25.0kHz2 Unmodulated
2
Demodulation output level 2
Demodulation distortion Demodulation SW noise Demodulation noise level
Lch Rch Lch Rch Lch Rch
- 98.0 - 88.0 - 98.0 - 88.0
Recordingplayback total characteristics (EE***INPUT: LINE IN L / R, OUTPUT: LINE OUT L / R) (PB***INPUT: FM PB IN, OUTPUT: LINE OUT L / R) Lch VRPL - 1.2 0.0 + 1.2 dB
EE mode: VIN = - 9.7dBV, R0 adjusted. PB mode: Input FM PB IN = 660mVP-P, f = 1.30MHz / 1.70MHz 1:1 MIX. Input DEV = DEVL,R (frequency deviation given above). EE / PB line out level difference.
Line output recording / playback level difference
Rch
VRPR
- 1.2
0.0
+ 1.2
dB
FM BPF (INPUT: FMPB IN, OUTPUT: BPF MONITOR L / R)
BPF center frequency setting resistance value
ROBPF
19.6
25.2
30.7
k
NTSC f = 1.505MH, VIN = 200mVP-P When BPF L and R output levels same.
LcH, RcH mix input signal level, 660mVP-P (RATIO 1:1)
NTSC Lch
1.30MHz insertion loss 1.15MHz attenuation 1.45MHz attenuation 1.70MHz attenuation
ATTNLC - 14.1 ATTNL 1.15 ATTNL 1.45 ATTNL 1.70
- 11.1
- 8.1
dB dB dB dB
1.30MHz + 1.70MHz When FM ALC is ON 1.15MHz + 1.70MHz 1.45MHz + 1.70MHz 1.30MHz + 1.70MHz
ATTNLC ATTNLC ATTNLC - 5.3 - 2.3 - 9.8 ATTNLC ATTNLC ATTNLC - 8.1 - 5.0 - 2.5 -- -- ATTNLC
12
Video ICs
Parameter NTSC Rch
1.70MHz insertion loss 1.55MHz attenuation 1.85MHz attenuation 1.30MHz attenuation
BH7779K
Symbol Min. Typ. Max. Unit Conditions
ATTNRC - 15.3 ATTNR 1.55 ATTNR 1.85 ATTNR 1.30
- 12.3
- 9.3
dB dB dB dB
1.30MHz + 1.70MHz When FM ALC is ON 1.55MHz + 1.30MHz 1.85MHz + 1.30MHz 1.30MHz + 1.70MHz
ATTNRC ATTNRC ATTNRC - 3.4 - 8.8 - 5.7 ATTNRC ATTNRC ATTNRC - 1.4 - 9.5 - 4.7 -- -- ATTNRC - 30.0
PAL Lch
1.40MHz insertion loss 1.80MHz attenuation
ATTPLC - 12.9 ATTPL 1.80 --
- 9.9 --
- 6.9 ATTPLC - 30.0
dB dB
1.40MHz + 1.80MHz 1.40MHz + 1.80MHz
PAL Rch
1.80MHz insertion loss 1.40MHz attenuation DO detect circuit DO detector level
ATTPRC - 14.3 ATTPR 1.40 --
- 11.3 --
- 8.3 ATTPLC - 30.0
dB dB
1.40MHz + 1.80MHz 1.40MHz + 1.80MHz
VDDO
--
83.0
--
dB
Input level to give DO due to attenuation.
FNORM to Hi-Fi return delay circuit 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
FNDLY
110
125
140
ms
Envelope detect circuit (INPUT: FM PB IN, OUTPUT: ENVE OUT) 0dB = 660mVP-P, 1.3MHz & 1.7MHz MIX input Envelope output level SP0 Envelope output level SP1 Envelope output level SP2 Envelope output level EP1
VENVSP0 VENVSP1 VENVSP2 VENVEP1
-- 2.08 3.70 1.96
0 2.58 3.95 2.46
100 3.08 4.20 2.96
mV V V V
No signal, SP MODE VIN = 0dB, SP MODE VIN = + 10dB, SP MODE VIN = - 4dB, EP MODE
Hold pulse circuit
Audio head switch pulse threshold voltage Hold pulse width
VTHHOLD HOLD
1.5 --
2.9 7.77
3.9 --
V s
Hysteresis (0.5V)
--
Control system mode holding voltages CLOCK IN
L mode holding voltage H mode holding voltage
VH9L VH9H
0.0 2.5
-- --
0.5 VCC
V V
-- --
DATA IN
L mode holding voltage H mode holding voltage
VH8L VH8H
0.0 2.5
-- --
0.5 VCC
V V
-- --
MUTE CTRL
MUTE holding voltage DC MUTE holding voltage
VH6L VH6H
0.0 3.9
-- --
1.0 VCC
V V
-- --
13
Video ICs
BH7779K
*Measurement circuit
22 470 0.01 NA REC OUT REC EQ HEAD EQ NAMEADIN HEADEQ IN 470 500 1k 330k 6.8k 500 VEE 47 2.2M 3.3 3.3 10k 48 1.5k 1800p 12k EQ 49 5.6k
2.2k
Hi-Fi IN L Hi-Fi IN R
VEE 3.3 10k 10 38 37 36 35 34 33
4.7 0.022 1.1k
3.3 40 ALC 39
5600p 47 46 45 44 43
42
41
50 51
RECAMP REC EQ
EQ
PB
32 PNR 31
5.6k 18k 0.01 47
TRAP OUT MIX OUT TRAP FILTER LINE OUT R LINE OUT L
VEE 47
AMP MIX AMP
LINE AMP LINE AMP
SW
AII MODEM
30 29
10k 6.8k 0.01 FM REC OUT
52 1500p 1500p 53 54
22k 22k VCC V A 4.7k
OUTPUT SWITCH Hi-Fi DET
28 AMSWP IN 27 26 25 D.O. COM. FMBPF 24 23 100 22 20k 15k 10k 0.022 A 10k
55 100 56 57 REG
VCCS
A VEES VEE LINE1 R IN LINE1 L IN LINE2 R IN LINE2 L IN 1k 1k 1k 1k
4.7k V 4.7k
58 59 100 60 61 DATA DECODER MODEM ENVE LOPE
21 50 20 19 10k 10k 47
FM PB IN
4.7k 62 4.7k 63 4.7k 33 64 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 INPUT SWITCH PNR
18 18k 17 5.6k 0.01
TUNER R IN TUNER L IN TUNER M IN BS R IN BS L IN 1k 1k 1k 4.7k 1k 4.7k 1k MUTE CTRL CLOCK DATA 4.7k ENVEOUT V 10 10k VEE 1.1k 0.022 4.7
Fig.1
14
Video ICs
BH7779K
*Application circuit example
4321 5678
BA7755
22 330 0.01 47
VEE
2.2M 3.3 3.3 3.3 36 35
4.7 10 0.022 10k 34 33 32 PNR 31 30 MODEM 29 28 Hi-Fi DET 27 26 0.022 25 D.O. COM. FMBPF 24 23 22 FM REC OUT AUDIO HEAD SWITCH PULSE IN 5.6k 0.01 1.1k
22k 48 12k 49 5.6k 50 2.2k 51 47 52 53 54 55 100 UNREG VCC 4.7k 56 57 UNREG VEE VEE 100 LINE1 R IN 4.7k LINE1 L IN 4.7k LINE2 R IN 4.7k LINE2 L IN 4.7k 64 33 1 TUNER R IN TUNER L IN TUNER M IN BS R IN 4.7k BS L IN MUTE CTRL 4.7k 2 3 4 63 62 INPUT SWITCH 61 60 4.7k 58 59 REG MIX AMP
LINE AMP
330k 12k 8.2k
BIAS OSC
5600p 1.5k 1800p
47
46
45
44
43 EQ
42
41
40 ALC
39
38
37
RECAMP REC EQ
EQ
PB
18k
47 P / R CTRL
VEE MIX OUT LINE R OUT LINE L OUT VCC
AMP
SW
AII
1500p 1500p
LINE AMP
OUTPUT SWITCH
DATA DECODER
MODEM
ENVE LOPE
21 20 19 47
FM PB IN
PNR
18 18k 17 5.6k 0.01
5
6
7
8
9
10
11
12
13
14
15
16 1.1k 0.022 4.7 ENVELOPE / Hi-Fi DET OUT CLOCK DATA
10 10k
Fig.2
15
Video ICs
BH7779K
*Electrical characteristic curve
-5 - 10 - 15 - 20 GAIN: GV (dB) - 25 - 30 - 35 - 40 - 45 - 50 - 55 0.75 0.90 1.05 1.20 1.35 1.50 1.65 1.80 1.95 2.10 2.25 FREQUENCY: f (MHz) Lch Rch
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
16
0.5

▲Up To Search▲

Price & Availability of BH7779K

	To Download BH7779K Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .