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LA1776M New
productt
Overview
The LA1776M is a car radio AM/FM tuner IC that is based on the current LA1787M but features improved AM upconversion (for improved reception characteristics) and improvements in most other characteristics as well. The LA1776M pin arrangement is only slightly changed from the LA1787M for easy printed circuit board pattern design.
Functions |
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■ FM front end | ■ FM IF | ■ Noise canceller | ■ MRC |
■ Multiplex | ■ AM upconversion | ■ FM/AM switch |
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Features
■Characteristics improved by new noise prevention measures in the mixer and amplifier blocks
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■Improved AM practical sensitivity and saturation
■FM
(Fixed resistors are used for SD, KEYEDAGC, MUTE ON ADJ, MUTE ATT, SNC, and HCC.)
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■The low power consumption of the earlier device has been reduced even further
■Increased flexibility in the MRC setting
■Package: QIP64E (14 14 mm)
Block Diagram
ST IND | 5V |
AM/FM SD
F0.022∝ |
| F0.022∝ |
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| BYPASS |
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| KEYEDAGC |
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| 0.022∝F |
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| 1 |
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| 9p |
| 2.7V |
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| BV | D - ANT - AM | IN - WAGC - AM |
| F ∝ |
| 3.3 |
| ADJ | 10k | F 1 ∝ |
| LC AM | F 100 ∝ | VCC | SD AM/FM IND ST | 100k |
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| 30k | 1.3k | + | F 2.2 ∝ |
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| VCC |
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| 56k∝F |
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| 0.022∝F |
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| + |
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| F∝ |
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| 75 | 100k | AM 2nd | 48 |
| 47 | 46 | 45 |
| 44 | 43 | 42 |
| 41 | 40 | 39 | 38 |
| 37 | 36 | 35 | 34 | 33 |
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| min:5k | MIX IN | 49 |
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Electronic Tuninguning ETRETR ControllersControllers
LC723500 SeriesSeries
Overview
The LC72350 Series (LC72358N, LC72362N, and LC72366) are
These devices include both a
Functions
■ROM: 16 KB (LC72358N) 24 KB (LC72362N)
32 KB (LC72366)
■RAM: 512 nibbles (LC72358N and LC72362N) 1024 nibbles (LC72366)
■A/D converter:
■PLL:
■Serial I/O: Three channels
■Multiple interrupt support: 4 levels
■Cycle time: 1.33 ∝s (4.5 MHz)
■QTP version: LC72P366
■Package: QIP80E (14 20 mm)
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| Block Diagram |
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EO1 | EO2 | BUSPD | EO3 |
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| PPQ | PP3 | PP2 | PP1 | PP0 | PO3 | PO2 | PO1 | PO0 | PN3 | PN2 | PN1 | PN0/BEEP |
| PM3 | PM2 | PM1 | PM0 | PL3 | PL2 | PL1 | PL0 | PK3 | PK2 | PK1/INT1 | PK0/INT0 | PJ3 | PJ2 | PJ1 | PJ0 | PI1/ADI5 | PI0/ADI4 |
| PH3/ADI3 | PH2/ADI2 | PH1/ADI1 | PH0/ADI0 |
| PHASE DETECTOR |
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| MPX | BEEPTONE |
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| INTERUPT |
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| SUB C.P | PHASE DETECTOR | DATA LATCH | BUS | DRIVR. | DATA | LATCH | BUS | DRIVR. | DATA | LATCH | BUS | DRIVR. | DATA | LATCH | BUS | DRIVR. | DATA | LATCH | BUS | DRIVR. | DATA | LATCH | BUS | DRIVR. | DATA | LATCH | BUS | DRIVR. | DATA LATCH | BUS | DRIVR. | BUS | DRIVR. | MPX | DATA | LATCH | BUS DRIVR. | ||||
| IOS | IOS | IOS | IOS |
| IOS |
620 |
| 1M | |
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| 100∝F |
| FC18G | 15p | 15p |
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| 50 |
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0.022∝F | 100 | 220 |
| AMDET |
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| MUTE | ||||
51 | AM | AMLC | ||||
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| IF2 |
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| 52 | AM | AMIF | ANT D | ||
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| AM | |||
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| AGC | ||||
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| IF1 |
| AGC | |
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| AM MIX | AM | drive | ||
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| 54 |
| Vsm | AM |
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| MUTE | 3 |
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| drive |
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| 1 | 2 |
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| H det |
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| s mute |
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| 31∝F | + | 8200p | ||
Q.DET | REG | SW |
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| 0.22 |
| 68k | |
2.7V |
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| 30 | +0.22∝F | ||||
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MUTE | REG | IF | MRC | 29 HCC | 30k | |||
NC.MPX | count AMP |
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AMP. | REG |
| out2 | 28 | SNC |
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| IF |
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| 3.3∝F | |||
Mute | FM IF |
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count SW | time | |||||||
ATT |
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control |
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| GAD |
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CONTROL | BUS CONTROL | INSTRU- CTION DECODER | SKIP |
| JUDGE | read/sritc status register | read only status register |
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JMP CAL RETURN INTERRUPT RESET | CF | ADC (6 bits) |
∝ |
AM |
100 F | 100k 100∝F | + | |
30M | |||
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0.022∝F | 0.022∝F | 470 | |
0.022∝F |
100k |
| 55 |
| X OSC | AM | |
| 100k |
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| 56 |
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200 |
| 57 | 1ST |
| KEYED | |
6p | IF |
| AGC | |||
AMP |
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| IN | 58 |
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| LEVEL | ||
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| DET | |||
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| 59 |
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Zap
FM Vsm
0.022∝F | 22∝F | + | 30 |
1000p | |||
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| 100k |
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| 1000p |
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3p | 33 | FE | 60 | AM/FM MIX | ||
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| VCC | 61 |
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| 62 |
| AM OSC | AM OSC | ||
| FM RF | |||||
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| BUFF |
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| 63 | AGC |
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| FM OSC | FM OSC | ||
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NC |
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HPF | LPF | |
ECL |
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ECL | - | + |
ECL
ECL
NC TRIG AGTE
ECL AGC
| SVC208 |
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| 100k 100k | 1 | 2 | GNDFE | 4 | 5 | 33k | SEN | 8 |
| 9 |
1000p | 100k | 180 | F0.1∝ |
| 0.001∝F | FMANT D | RF1FM | SVC208 18p | 8p FMOSC | 33p 22p | 1000p | NOISEAGC 150k 0.47∝F | AGCADJ AM/FM OSCBUFF | 300p | OSC | |
15p |
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| 220k |
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| AGC |
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1000p |
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| 100 |
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| 100k |
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| 30k |
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| AM |
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REG |
| REG | FM/AM |
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| 26 | + | MRCADJ | ||
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| MRC |
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BUFF |
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| AM | 3.3∝F 51k | ||||||
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| noise |
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| REG | AM/FM |
| amp | 25 GND |
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| AM/FM VSM | ∝ | ||||
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| FE |
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| SW |
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| 24 | + | 0.022 F | |
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| IF COUNT |
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| 23 BUFFER |
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| VCO | phase | tri | 22 | PHASE- | + | ||
| HCC |
| comp | ger |
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| stop |
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| 21 COM | + |
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| pilot |
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| SNC |
| FF 38k | FF | 20 VCO |
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| det |
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| 19k | CSB | |||||
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| pilot | ||||
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| FF | VCO |
| can | 19 | 20k 0.047∝F | ||
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| Sud De | 18 | |||
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| 100k | |||
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| Main |
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| coder |
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| MATRIX |
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| HC |
| 17 OUT |
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10 | 11 | 12 | 13 | 14 | 15 | 16 | ||||
| IN |
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6800p | PLL IN | 10.25M IN | NC,MPX GND | MPX OUT L 0.015∝F | MPX OUT R 0.015∝F |
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HOLD | LPFOUT 0.01∝F |
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0.022∝F
47k IF Buffer
5/2.5/0V
REFERENCE DIVIDER |
| PROGRAMABLE DIVIDER |
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| PLL Data Latch PLL |
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| ADDRESS DECODER |
| (LC72366) BANK |
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| PROGRAM COUNTER |
| STACK BANK |
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| DO | JDC CCD |
| DATA BUS | |
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| Time PHASE CONTROL UNIVERSAL COUNTER (20 bits) | RAM 512k 4bits | (LC72358/362) | 1024k 4bits |
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| 8k 16bits | (LC72358) | 12k 16bits (LC72362) | 16k 16bits (LC72366) | ADDRESS DECODER |
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| LATCE A ALU |
| B INTERRUPT |
| CSUST |
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| 1/114,1/124 |
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| ROM | 14 | 14 |
| LATCE | TIMER 0 | TIMER 1 |
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DIVIDER | SYSTEM CLOCK GEMERATOR | 1/16,1/17 |
| SNS | SNS F/F | VDET RESET | RESET | 1/2 |
| BUS | DRIVR. | DATA | LATCH | BUS DRIVR. | DATA | LATCH | BUS | DRIVR. | DATA | LATCH | BUS DRIVR. | DATA LATCH IOS | BUS DRIVR. | DATA | LATCH IOS | BUS | DRIVR. | ISO | 3 | DATA LATCH IOS | BUS DRIVR. | |||
XIN |
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| SNS | VDD VSS |
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| PA0 | PA1 | PA2 PA3 | PB0 | PB1 | PB2 | PB3 | PC0 | PC1 | PC2 | PC3 | PD0 | PD1 | PD2 | PD3 | PE0 |
| PF0 |
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| PG0 |
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AM VCC 8V AM ANT AM/FM ANT IN FE GND AM/FM VT FE VCC | AM/FM SW | AM/FM | 10.25kHz IN | GND VCC FM/AM VSM |
OSC BUFF
XOUT | FMIN | AMIN | HCTR | LCTR | MOLD TEST1 TEST2 | PCK2/PE1 | SO2/PE2 | SI2/PE3 | PCK1/PF1 | SO1/PF2 | SI1/PF3 | PCK0/PG1 | SO0/PG2 | SI0/PG3 |
| 51 Car Audio | 52 Car Audio |
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