m65845afp Renesas Electronics Corporation., m65845afp Datasheet

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m65845afp

Manufacturer Part Number
m65845afp
Description
Digital Echo With Microphone Mixing Circuit
Manufacturer
Renesas Electronics Corporation.
Datasheet

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M65845AFP
Digital Echo with Microphone Mixing Circuit
Description
The M65845AFP is a CMOS IC built-in digital echo function with microphone peripheral circuits for Karaoke
equipment packed in a single chip.
It is suitable for Karaoke equipments such as video CD player, mini stereo, CD-radio cassette, TV or VCR.
Being pin compatible with the M65845FP, the M65845AFP is suitable for upgrading the series.
Features
• High performance digital echo circuit thanks to 16 Kbit memory
• Two microphone-mixing lines, vocal cut circuit, digital echo, and line-mixing amplifier are contained, enabling
• ALC-equipped microphone amplifiers permit excessively high-input. ALC operating voltage can be set as desired.
• Vocal cut circuit of complete stereo construction
• Compatibility with the M65845FP
• Built-in current-control oscillation circuit
• Built-in automatic reset circuit activated with power on
• Single power supply (5 V)
Recommended Operating Condition
• Supply voltage range: V
• Rated supply voltage: V
System Configuration
Lch
INPUT
Rch
INPUT
MIC1
MIC2
REJ03F0170-0201 Rev.2.01 Jan 25, 2008
Page 1 of 13
single-chip package of microphone peripheral circuit of Karaoke equipment.
ALC
ALC
CC
CC
MIC VOL
MIC VOL
= 5 V
= 4.5 V to 5.5 V
MIX
Source
selector
Vocal
cut
Echo VOL
R
Digital
echo
L
AUDIO SW
MIX
MIX
MIX
REJ03F0170-0201
Jan 25, 2007
Rev.2.01
Lch
OUTPUT
Rch
OUTPUT
MIC SW

Related parts for m65845afp

m65845afp Summary of contents

Page 1

... M65845AFP Digital Echo with Microphone Mixing Circuit Description The M65845AFP is a CMOS IC built-in digital echo function with microphone peripheral circuits for Karaoke equipment packed in a single chip suitable for Karaoke equipments such as video CD player, mini stereo, CD-radio cassette VCR. ...

Page 2

... M65845AFP Block Diagram REJ03F0170-0201 Rev.2.01 Jan 25, 2008 Page ...

Page 3

... MIC1OUT MIC1VOLIN MIC2IN ALC2 MIC2NFIN MIC2OUT MIC2VOLIN 10 MICOUT 11 LPF1 IN 12 LPF1 OUT 13 ADINTIN 14 ADINTOUT 15 ADCONT 16 REF 17 GND 18 REJ03F0170-0201 Rev.2.01 Jan 25, 2008 Page M65845AFP (Top view) Outline: PRSP0036GA-A (36P2R-A) 36 VCFIL 35 VALC 34 AUDSW2 33 AUDSW1 32 CLOCK CONT 31 MICSW 30 MICECHOOUT ...

Page 4

... M65845AFP Pin Description Pin No. Symbol Pin Name 1 MIC1IN MIC1 input 2 ALC1 ALC1 control 3 MIC1NFIN MIC1 NF input 4 MIC1OUT MIC1 output 5 MIC1VOLIN MIC1 volume input 6 MIC2IN MIC2 input 7 ALC2 ALC2 control 8 MIC2NFIN MIC2 NF input 9 MIC2OUT MIC2 output 10 MIC2VOLIN MIC2 volume input 11 MICOUT MIC output ...

Page 5

... M65845AFP Absolute Maximum Ratings Item Symbol Supply voltage V CC Circuit current I CC Input voltage Vi Power dissipation Pd Operating temperature Topr Storage temperature Tstg Recommended Operating Condition Item Symbol Supply voltage input voltage input voltage V IH Electrical Characteristics ( kHz 100mVrms, fck = 2 MHz 25°C, unless otherwise noted) ...

Page 6

... Hz, for instance, the constants take the following values 3.3 kΩ 2.2 μF <Attention point when M65845FP is replaced with M65845AFP> R3 and C4 are required for the M65845FP, not for the M65845AFP. As mentioned above, the gain of microphone amplifier can set it up with R1. R3 and C4 are not required for the M65845AFP. ...

Page 7

... M65845AFP ALC Level Block Diagram Vo (dBV –10 –20 –30 –60 ALC Operation Voltage Control ALC operation voltage can be formed within the limits of – dBV controlled by DC control voltage which connect pin 35. (Setting up forms) half peak voltage Vpo When ALC operation voltage is –5 dBV (at V – ...

Page 8

... M65845AFP Input impedance to pin high (1 MΩ) that ALC base voltage can be determined by division resistance ALC Operation Voltage (dBV –2 –4 –6 –8 –10 MIC SW Input low level to pin 31 (MIC SW), then microphone and echo signal can be cut. ...

Page 9

... M65845AFP 4. Vocal cut method turned down Lch and Rch input having the same phase and sound. Low pass cut off frequency fc is determined by a capacitance which connect to pin 36 (vocal cut filter also having a function which through frequency under vocal level for supplying a lack of low level sound. ...

Page 10

... M65845AFP 2. Auto mute function The IC carries out auto mute function at the time of powering up and switching on MIC SW in order to suppress shock noise that the digital delay may produce. At power up Reset Time At switching on MIC SW MIC SW OFF 3. Input and output LPF Signal through frequency fsig is also determined by LPF of digital echo cut off frequency. ...

Page 11

... As mentioned above, the M65845AFP can be replaced with the M65845FP without changing the board. Notes: *1. The components marked with a circle are required for the M65845FP, not for the M65845AFP. *2. The M65845AFP is different from the M65845FP a part of the components marked with a circle. REJ03F0170-0201 Rev.2.01 Jan 25, 2008 ...

Page 12

... M65845AFP Application Example Microphone amplifier : G ECHO 5k 1 MIC1 4.7 2 30k MIC2 4.7 1 2.2 1 30k 24k 0.047 24k 24k 0.068 0.1 47 REJ03F0170-0201 Rev.2.01 Jan 25, 2008 Page dB, fcl = ALC operating voltage –4 dBV : Delay time 197 ms (fs = 83.3 kHz) Cut-off frequency 3.1 kHz 1 MICIN ...

Page 13

... M65845AFP Package Dimensions JEITA Package Code RENESAS Code P-SSOP36-8.4x15-0.80 PRSP0036GA Index mark REJ03F0170-0201 Rev.2.01 Jan 25, 2008 Page Previous Code MASS[Typ.] 36P2R-A 0. NOTE) 1. DIMENSIONS "*1" AND "*2" DO NOT INCLUDE MOLD FLASH. 2. DIMENSION "*3" DOES NOT INCLUDE TRIM OFFSET ...

Page 14

Notes: 1. This document is provided for reference purposes only so that Renesas customers may select the appropriate Renesas products for their use. Renesas neither makes warranties or representations with respect to the accuracy or completeness of the information contained ...

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