The MT8870D/MT8870D-1 is a complete DTMF receiver that integrates both the bandsplit filter and digital decoder functions. It uses switched capacitor techniques for high and low group filters and digital counting techniques to detect and decode all 16 DTMF tone pairs into a 4-bit code. The external component count is minimized by the on-chip provision of a differential input amplifier, clock oscillator, and latched three-state bus interface.

The 4N26 Optocoupler is a high-performance component designed for electrical isolation and efficient signal transmission. With a voltage isolation of 7500Vpk and a current transfer ratio of at least 20%, it ensures reliable performance. This optocoupler comes in a 6-DIP package for through hole mounting.

Key Features:

• Part NO.: 4N26M
• Package: 6-DIP (0.300, 7.62mm)
• Number of Channels: 1
• Input Type: DC
• Voltage - Isolation: 7500Vpk
• Current Transfer Ratio (Min): 20% @ 10mA
• Voltage - Output: 30V
• Current - DC Forward (If): 60mA
• Vce Saturation (Max): 500mV
• Output Type: Transistor with Base
• Mounting Type: Through Hole

Supplier: SICSTOCK

• Operating Voltage: 1.8V to 5.5V
• Flash Memory: 16 kB
• EEPROM: 512 Byte
• SRAM: 1 kB

• High-performance 4-to-10 line decoder/demultiplexer
• Single supply voltage operation ranging from 3V to 18V
• High current drive capability: 6.8mA (output high/low)
• Wide operating temperature range: -55°C to 125°C

The STK465 is a Hybrid IC made by Sanyo Corporation, ideal for building stereo amplifiers. This 16-pin IMST Hybrid IC provides a maximum output of 30 watts per channel, with a recommended supply voltage of ±28V and a load resistance of 8Ω.

• Hybrid IC for stereo amplifiers
• Maximum Output: 30W per channel
• Supply Voltage: ±28V (Recommended)
• Load Resistance: 8Ω
• Package: 16-pin 4016

• 3-STATE version of 74LS153 with the same pinout.
• Schottky-diode-clamped transistors.
• Allows multiplexing from N-lines to one line.
• Performs parallel-to-serial conversion.

• Flash program memory type
• 14 KB program memory size
• 5 MIPS CPU speed
• 368 bytes of SRAM

The STK4191 II 2-Channel 50W AF Power Amplifier, made in Korea, delivers high-quality audio amplification for home and professional use. With a robust build and superior performance, it ensures clear and powerful sound.

• High precision and stability timing capability
• Operates in Astable and Monostable modes
• Wide range of operating voltages up to 18V
• TTL-compatible output for easy integration

The CD4046 IC is a versatile CMOS micropower phase-locked loop (PLL) designed for a wide range of applications. Key features include:

• Low-power, linear voltage-controlled oscillator (VCO)
• Two different phase comparators with common signal-input amplifier
• 5.2-V zener diode for supply regulation
• Available in various 16-lead packages

Perfect for FM demodulation, frequency synthesis, and more.

• 4 independent XOR gates in one IC
• Low power consumption with a quiescent current of 2 µA
• Wide operating voltage range (2V ~ 6V)
• High-speed switching with a propagation delay of 20ns at 6V

• 14-bit binary counter/divider.
• Wide operating voltage range (3V to 18V).
• High clock frequency capability (up to 30MHz at 15V).
• Fast reset propagation delay of 25ns at 5V.

The LM317T adjustable positive voltage regulator can supply up to 1.5A over an output range of 1.2V to 37V. Easy to use with just two external resistors required, it offers superior line and load regulation compared to standard fixed regulators.

• Output Current: Up to 1.5A
• Output Voltage Range: 1.2V to 37V
• Requires only two external resistors to set output voltage
• Superior line and load regulation
• Full overload protection: current limit and thermal overload protection

The Vishay / Dale WSL3637R0100FEA Power Metal Strip Resistor is designed for high-power applications, offering robust performance and reliability. Key features include:

• Resistance: 0.01 Ohms
• Power Rating: 3 W
• Tolerance: 1%
• Temperature Coefficient: 50 PPM / C
• Operating Temperature Range: -65°C to +170°C
• 4-terminal termination style
• RoHS Compliant

The 74LS00 / 7400 / 74HC00 are quad 2-input NAND gate ICs housed in a 14-pin DIP package. These logic gates are designed for high-speed operation with a supply voltage range of 2V to 6V and an output current of 5.2mA. They are ideal for various digital logic applications.

• Low Voltage Operation: Supports 2.7V to 5.5V (Standard Voltage) and 1.8V to 3.6V (Low Voltage)
• Memory Size: 256K bits, organized as 16,384 x 8 or 32,768 x 8
• Data Transfer: Two-wire serial interface for easy integration

• Noise Suppression: Schmitt Trigger, filtered inputs to reduce noise