TC9455N Toshiba Semiconductor, TC9455N Datasheet

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TC9455N

Manufacturer Part Number
TC9455N
Description
(TC9455 / TC9488) TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
Manufacturer
Toshiba Semiconductor
Datasheet
Digital Echo IC for Karaoke
The TC9455 series are digital echo ICs for karaoke. The ICs
incorporate microphone amps and volume controllers, enabling a
digital echo system to be configured on a single chip.
Features
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Pin Connection
TC9455F,TC9455N,TC9488F,TC9488N
Incorporates a two-channel microphone amp with auto level
control (ALC), AD/DA converter, delay memory, and electronic
volume controllers.
Incorporates a 32-kHz sampling, 12-bit successive comparison
AD/DA converter.
Incorporates a delay memory (16-Kbit DRAM) which enables
128-ms (typ.) delay.
Microphone and echo levels are controlled by built-in volume
controllers. They are controlled either by DC voltage or
controlled in serial by the MCU.
The system clock is generated by the CR oscillator circuit.
The echo feedback amount is configured using analog circuits.
The feedback level can be freely set
The IC comes in 30-pin flat package or 24-pin shrink DIP.
TC9455F/N: Supports I
TC9488F/N: Supports three-lead interface
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
2
C bus interface
.
1
Weight:
SSOP30-P-375-1.00: 1.08 g (typ.)
SDIP24-P-300-1.78: 1.2 g (typ.)
TC9455F
TC9488F
TC9455N
TC9488N
TC9455,88F/N
2002-02-05

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TC9455N Summary of contents

Page 1

... The system clock is generated by the CR oscillator circuit. · · The echo feedback amount is configured using analog circuits. The feedback level can be freely set The IC comes in 30-pin flat package or 24-pin shrink DIP. · Pin Connection . 1 TC9455,88F/N TC9455F TC9488F TC9455N TC9488N Weight: SSOP30-P-375-1.00: 1.08 g (typ.) SDIP24-P-300-1.78: 1.2 g (typ.) 2002-02-05 ...

Page 2

Block Diagram System Block Diagram 2 TC9455,88F/N 2002-02-05 ...

Page 3

... Pin Description (Note 1) Pin Number Symbol TC9455N TC9455F TC9488N TC9488F CSCC 3 3 OSCR 4 5 VOL1 ( VOL2 (SCL VOL3 (SDA VRO REF 9 11 VDA 10 13 ALC1 11 14 MC1N 12 15 MC1P 13 16 MC2P 14 17 MC2N 15 18 ...

Page 4

Operation 1. Oscillator circuit The TC9455F/N and TC9488F/N generate an internal system clock using the CR oscillator circuit. Connecting a capacitance ( and a resistance (R) of 5.6 kΩ sets the oscillator frequency to approx. 4 MHz ...

Page 5

AD/DA converter and digital delay circuit 3. The AD/DA converter is a 12-bit successive comparison type. The sampling frequency when the system clock operates at 4 MHz is 32 kHz. The analog signal input from the AD converter is converted ...

Page 6

Electronic volume controllers The IC incorporates microphone input 1 (MIC1) and microphone input 2 (MIC2) volume and echo volume controllers. The built-in volume controller operates in 16 steps. Using an external variable resistor, volume can be controlled by the ...

Page 7

Setting of microphone and echo volumes Table 2 lists the microphone setting values and attenuation; Table 3 lists the echo volume setting values and attenuation. The DC level settings are typical values. Table 2 Microphone volume (VOL1, VOL2) attenuation ...

Page 8

Maximum Ratings (Ta = 25°C) Characteristics Supply voltage Input voltage Power dissipation Operating temperature Storage temperature Electrical Characteristics DC characteristics Characteristics Operating supply voltage Operating supply current Operating frequency Power-on reset voltage “H” level Input voltage “L” level “H” level ...

Page 9

AC Characteristics Microphone amps and volumes Characteristics Microphone amp gain MCO Output at ALC Operation Maximum Input at No ALC Operation Maximum Input 1 at ALC Operation Maximum Input 2 at ALC Operation POOUT output noise 1 POOUT output noise ...

Page 10

AC Characteristics Test Points 1. TC9488F/N three-lead interface 2 2. TC9455F bus interface 2 Purchase of TOSHIBA I C components conveys a license under the Phillips I 2 components system, provided that the system ...

Page 11

TC9455/88F AC Test Circuit 11 TC9455,88F/N 2002-02-05 ...

Page 12

Package Dimensions Weight: 1.08 g (typ.) 12 TC9455,88F/N 2002-02-05 ...

Page 13

Package Dimensions Weight: 1.2 g (typ.) 13 TC9455,88F/N 2002-02-05 ...

Page 14

... In developing your designs,p lease ensure that TOSHIBA products are used within specified operating ranges as set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and conditions set forth in the “Handling Guide for Semiconductor Devices,” or “TOSHIBA Semiconductor Reliability Handbook” etc.. ...

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