H2R Electronics

• Echo Processor IC
• CMOS Technology
• Least External Components
• Auto Reset Function
• Low Noise, No<-90dBV Typical
• Low Distortion, THD<0.5% Typical
• External Adjustable VCO
• Package: DIP-16

• Wide supply voltage range: 2.0 to 12 V
• Low current consumption: 7.5 mA at AM, 9.0 mA at FM
• High selectivity with distributed IF gain
• LED driver for tuning indication
• High input sensitivity: 1.6 mV/m (AM), 2.0µV (FM) for 26 dB S/N
• Good strong signal behaviour: 10 V/m at AM, 500 mV at FM
• Low output distortion: 0.8% at AM, 0.3% at FM
• Designed for simple and reliable PC-board layout
• High impedance MOSFET input on AM

• 10W Output Power:The TDA2003 can deliver up to 10 watts of output power, making it suitable for a variety of audio amplification needs. 
• High Output Current:It boasts a high output current capability, up to 3.5A, which contributes to its ability to drive speakers effectively. 
• Low Distortion:The TDA2003 is designed to minimize harmonic and crossover distortion, resulting in clearer audio reproduction. 
• Short Circuit and Thermal Protection:It includes built-in protection circuits that safeguard the IC from damage due to short circuits (both AC and DC) and excessive heat. 
• Ease of Use:The TDA2003 requires very few external components, simplifying circuit design and assembly. 
• Robustness:The protection features make the TDA2003 a reliable choice, especially in automotive applications where voltage surges and accidental shorts are common. 

• Car Audio Amplifiers: Widely used in car radios and other automotive audio systems. 
• DIY Audio Projects: Popular for building small to medium-sized audio amplifiers due to its simplicity and performance. 
• General Audio Amplification: Can be used in various other audio applications where a compact and reliable amplifier is needed. 

• Multi-Band Reception: Receives AM, FM, and Shortwave (SW) bands. 
• Digital Tuning: Delivers the performance advantages of digital tuning with minimal components and no manual alignment required during manufacturing. 
• Low Power Consumption: Designed for low-power applications, capable of running on two AAA batteries. 
• Integrated Functionality: Combines the entire radio receiver function, from antenna input to mono audio output, into a single chip. 
• Wide Bandwidth Support: Covers worldwide FM bands (64–109 MHz), AM bands (504–1750 kHz), and SW bands (2.3–28.5 MHz). 
• Automatic Frequency Control (AFC): Helps to stabilize and maintain a clear signal. 
• Simple Design: Requires a simple application circuit with minimal external components, reducing design complexity. 

• Output Power:
  • 2 x 210 W into a 4 Ω load in stereo mode (Single-Ended, SE)
  • 1 x 420 W into an 8 Ω load in mono mode (Bridge-Tied Load, BTL)
• Efficiency: High efficiency (around 93%) due to its Class D design, which reduces power dissipation.
• Supply Voltage: Operates over a wide symmetrical supply voltage range from ±12.5 V to ±42.5 V.
• Input Type: Features stereo full differential inputs, according to NXP.
• Protection: Includes advanced protection mechanisms such as:
  • Thermal FoldBack (TFB)
  • Over Current Protection (OCP)
  • Short-circuit protection
  • Over-voltage protection
  • Under-voltage protection
• Other features:
  • Low noise and distortion
  • Smooth pop noise-free start-up and switch off
  • Low quiescent current consumption
  • Selectable thermal fold back and current limiting to avoid audio interruptions
• Applications: Commonly used in various high-power audio applications, such as:
  • Home theater systems
  • Car audio systems
  • Professional audio equipment
  • Powered speakers
  • Subwoofer amplifiers
  • Musical instrument amplifiers
  • Multimedia speakers

LA7840 Features

* . Low power dissipation due to built-in pump-up circuit . Vertical output circuit . Thermal protection circuit built in . Excellent crossover characteristics . DC coupling possible Specifications Maximum Ratings at Ta = 25 °C Parameter Maximum supply voltage Output block supply voltage Deflection 

• CAN Transceiver: Includes a 1.0 Mbps CAN 2.0-compliant transceiver for intermodule communication. 
• Regulator: Features a protected 5.0 V low-dropout regulator, with the option to use an external pass transistor for a second 5.0 V output. 
• SPI Interface: Controlled via a Serial Peripheral Interface (SPI) for communication and device control. 
• Operating Modes: Supports Normal, Standby, Stop, and Sleep modes to manage power consumption. 
• Protective Features: Integrates overtemperature prewarning, current limiting, and output monitoring for reliability. 
• Watchdog Timer: A programmable window watchdog provides a safety mechanism. 
• Wake-up Inputs: Includes multiple inputs that can wake the device from low-power modes. 
• High-Side Switch: Contains an internally protected high-side power supply output. 

• Automotive: Found in automotive ECUs for body control modules, climate control, and lighting systems.
• Industrial: Suitable for motor control, power supplies, and industrial automation.
• Appliances: Can be used in home appliances and battery management systems.

• Multi-channel Processing: Handles 8 channels of 24-bit DDX® (direct digital amplification). 
• High-Quality Audio: Delivers >100dB of Signal-to-Noise Ratio (SNR) and dynamic range. 
• Versatile Input Support: Accepts most digital formats, including high-resolution 192 kHz, 24-bit audio and DSD/SACD. 
• Digital Control: Provides wide digital gain/attenuation ranges (+58dB to -100dB in 0.5dB steps) and channel trim options. 
• DSP Functions: Includes up to 10 independent, user-programmable 32-bit biquad filters (EQ), bass/treble tone control, and channel mixing. 
• Advanced Audio Features: Incorporates dual independent limiters/compressors, dynamic range compression, and various muting functions. 
• Automatic Modes: Offers Automode™ with preset EQ curves, automatic volume-controlled loudness, and modes for nighttime listening and channel/commercial volume control. 
• Flexible Outputs: Can provide bass management for 5.1 or 2.1 configurations and simultaneous downmix outputs. 

• Chipset: STMicroelectronics TDA7498E
• Amplifier Type: Dual-channel Class-D BTL power amplifier
• Output Power: 2x160W into 4 ohms or 1x220W in parallel BTL mode
• Efficiency: High efficiency (e.g., 85%) for low power loss and cool operation
• Power Supply: Wide range single power supply (15-36V DC)
• Speaker Impedance: Compatible with 4, 6, and 8 ohm speakers

• Type: Integrated Class-B audio amplifier
• Application: Primarily automotive, for car radio systems
• Power Output: 2 x 55W into 2-ohm load
• Channels: 2-channel stereo (Stereo BTL)
• Input Stage: Differential inputs for enhanced signal integrity
• Diagnostic Outputs: Provides diagnostic information
• Package: 20-pin HSOP (Heat-Sink Small Outline Package)
• Protection: Includes short-circuit and thermal protection

• High Efficiency:As a Class-D amplifier, it offers superior efficiency and minimal power dissipation compared to traditional amplifiers. 
• Output Power:Delivers up to 2 x 100W output power, making it suitable for high-demand audio systems. 
• Low Distortion:Features low THD+N (Total Harmonic Distortion + Noise) for high-fidelity audio reproduction. 
• Wide Voltage Range:Operates with a broad supply voltage range, from ±12.5V to ±30V. 
• Protection Mechanisms:Includes integrated protection circuits for over-temperature, over-current, and short-circuit protection, enhancing reliability. 
• Flexible Configuration:Can be used in a dual-channel stereo configuration or a single-channel mono Bridge-Tied Load (BTL) configuration. 

• Role: A PWM controller for power supplies. 
• Primary Use: Controlling and regulating high-voltage circuits in power supplies for CRT, projection, and LCD televisions. 
• Manufacturer: Specifically associated with Sony, where it has the part number 6-705-810-1. 
• Package: Commonly available in an 18-pin Dual In-Line Package (DIP). 

•  
  • Dual Amplifier:The TDA2005 contains two separate audio amplifiers within a single package. 
  • Multiwatt-11 Package:It's housed in a Multiwatt-11 package, which is a common type of integrated circuit package. 
  • Stereo and Bridge Configurations:The TDA2005 can be configured for stereo operation (driving two separate channels) or for bridge operation (where both amplifiers are combined to drive a single, higher-power channel). 
The TDA2005 is a 20-watt class B dual audio amplifier IC, specifically designed for car radio and stereo applications. It features a high current capability (up to 3.5A) and can drive low impedance loads (down to 1.6 ohms) in stereo mode. In a bridge configuration, it can deliver more than 20 watts of output power. The TDA2005 is commonly used as a power booster amplifier in car stereos. Here's a more detailed breakdown:

• Matched rise/fall time
• Latch-up protection - Will withstand 1.5A reverse current
• Logic input will withstand negative swings up to 5V
• 2.5Ω Low output impedance (typical)
• 41ns Typical short delay time

Power Management, Signal Processing, Motor Drive & Control, Automotive

•  
  • Encapsulation: HTSSOP-44. Some sources suggest TSSOP-56.
  • Manufacturer: Conflicting reports point to either Sony or Texas Instruments. A definitive datasheet is needed for full confirmation.
  • Application:
    • Audio/Video Signal Processing: Designed for consumer electronics devices.
    • Computer Storage: Some sources suggest it's designed for computer storage applications.
    • FaxEngine: Several sources specify the part as a "Single-Chip FaxEngine".
    • Audio Amplifier: A listing on Amazon suggests a "Class D Audio Amplifier Chip".
The CXD9981TN is a type of integrated circuit (IC) or semiconductor chip. It has been referenced by multiple manufacturers and for different applications in consumer electronics. Some sources associate the part with Sony, while others associate it with Texas Instruments. Known specifications

• tda7294 multiwatt15 package
• 100watt high power output
• high current output
• best for loudspeaker
• can be used in bridge mode

This portable am fm radio use the TEA5711 radio receiver IC which is a high performance Bimos IC for use in AM FM stereo radios with all necessary functions integrated .
Using TEA5711 circuit we can make an simple and compact portable am fm radio using few external components .
Main features of TEA5711 circuit are : wide supply voltage range: 1.8 or 2.1 to 12 V , Low current consumption: 15 mA at AM, 16 mA at FM , High selectivity with distributed IF gain , LED driver for stereo indication , High input sensitivity: 1.6 mV/m (AM), 2.0 mV (FM) for 26 dB S/N , Good strong signal behavior (10 V/m at AM,500 mV at FM) , Low output distortion ( 0.8% at AM, 0.3% at FM ) .
The AM circuit incorporates a double balanced mixer, a one pin low-voltage oscillator (up to 30 MHz) a field-strength indicator output and is designed for distributed selectivity.
The FM circuit incorporates a tuned RF stage, a double balanced mixer, a one-pin oscillator, a field-strength indicator output and is designed for distributed IF ceramic filters.
The PLL stereo decoder incorporates a signal dependent stereo circuit, a soft-mute circuit and a stereo indicator LED driver.

The TEA5711 incorporates internal stabilized power supplies. The maximum supply voltage is 12 V, the minimum voltage can go down temporarily to 1.8 V without any loss in performance.
The TEA5711 portable am fm radio from this schematic works from 522 to 1611 kHz AM and 87.5 to 108 MHz FM.
For AF amplifier is used the TDA7050T circuit .

CS8673E: High-Efficiency 2x40W/80W Class D Audio Amplifier

The CS8673E is a high-performance Class D audio power amplifier, delivering 2x40W stereo output or 80W in mono mode with 92% efficiency. Designed for high-quality audio applications, it features advanced EMI suppression, allowing the use of cost-effective ferrite bead filters.

With built-in over-current, short-circuit, and over-temperature protection, the CS8673E ensures durability under various conditions. Its compact ESOP16 package saves PCB space, making it ideal for space-constrained designs. Operating efficiently from -40℃ to 85℃, this amplifier provides reliable and powerful sound output without requiring an additional heat sink.

The 33972 Multiple Switch Detection Interface with suppressed wake-up is designed to detect the closing and opening of up to 22 switch contacts. The switch status, either open or closed, is transferred to the microprocessor unit (MCU) through a serial peripheral interface (SPI). The device also features a 22-to-1 analog multiplexer for reading inputs as analog. The analog input signal is buffered and provided on the AMUX output pin for the MCU to read.

The 33972 device has two modes of operation, Normal and Sleep. Normal mode allows programming of the device and supplies switch contacts with pull-up or pull-down current as it monitors switch change of state. The Sleep mode provides low quiescent current, which makes the 33972 ideal for automotive and industrial products requiring low sleep-state currents.

The TAS5342LA is a high-performance, integrated stereo digital amplifier power stage designed to drive a 4-Ω bridge-tied load (BTL) at up to 100 W per channel with low-harmonic distortion, low-integrated noise, and low-idle current.

The TAS5342LA has a complete protection system integrated on-chip, safeguarding the device against a wide range of fault conditions that could damage the system. These protection features are short-circuit protection, over-current protection, under voltage protection, over temperature protection, and a loss of PWM signal (PWM activity detector).

A power-on-reset (POR) circuit is used to eliminate power-supply sequencing that is required for most power-stage designs.

• Single-Supply Operation: Works with a power supply between 2.7V and 5.5V. 
• Output Power: Can deliver 1.4W into a 4Ω load at 1% THD+N. 
• Low-Power Shutdown: Offers a low-power shutdown mode (10nA) to conserve power when not in use. 
• Pin Compatibility: The MAX9716 is pin-compatible with the LM4890, making it a potential replacement. 
• Adjustable Gain: Provides an option for adjustable gain using external resistors, making it versatile for various applications. 
• Compact Packages: Available in compact packages like µMAX and TDFN (3mm x 3mm). 

The V2164M will operate over a wide supply voltage range of ±4 V to ±18 V. Available in 16-pin SOIC and DIL packages, the device is guaranteed for operation over the extended industrial temperature range of -40°C to +85°C. The V2164M is suitable for many applications such as Remote, Automatic, or Computer Volume Controls , Automotive Volume / Balance/Faders, Audio Mixers, Compressor / Limiters / Compandors, Noise Reduction Systems, Automatic Gain Controls, Voltage Controlled Filters, Spatial Sound Processors, Effects Processors, etc.

• CMOS Technology
• Mounting type: SMD
• Low Power Consumption
• Least External Components
• Attenuation Range: 0 to -79dB at 1dB/step
• Operating Voltage: 5 to 9 V
•  Low Noise, S/N Ratio>100dB (A-weighting)
•  High Channel Separation
• I2C Bus Control Interface
• Selectable Address
• 6-Channel Outputs
•  Available in 20 pins, DIP or SOP

M51995A is the primary switching regulator controller which is especially designed to get the regulated DC voltage from AC power supply.

This IC can directly drive the MOS-FET with fast rise and fast fall output pulse.

Type M51995A has the functions of not only high frequency OSC and fast output drive but also current limit with fast response and high sensibility so the true “fast switching regulator” can be realized.

It has another big feature of current protection to short and over current, owing to the integrated timer-type protection circuit, if few parts are added to the primary side.

• Function:CR18818 acts as a voltage regulator, managing the power supply within a circuit. 
• Package:It is typically found in an 8-pin dual in-line package (DIP-8). 
• Applications:This chip is often used in LCD power management circuits and other electronic devices requiring stable voltage regulation