DATASHEET and Circuit Diagram

If you need a quad two-input NAND gate which each input has a Schmitt trigger circuit you may consider the HEF4093B. It is suitable for industrial temperatur range (-40 °C to +85 °C) and/or automotive temperature range (-40 °C to +125 °C), and for applications such wave and pulse shapers, astable multivibrators, and monostable multivibrators.

It is recommended to operate this HEF4093B at Vdd power supply range of 3V to 15V referenced to Vss(ground). You must connect Vdd, Vss or another inputs with unused inputs, according to the datasheet. Another features of this device are fully static operation, Schmitt trigger input discrimination, complies with JEDEC standard JESD 13-B, and have an ESD protection exceeds 200V/2000V.

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Amplifier’s provide high-performance sound reinforcement for your mobile audio equipment. The TDA7801 is a new BCD technology quad bridge amplifier for car audio applications. The on-chip digital diagnostic processor and I2C bus add all the intelligence and configurability that are needed today in automotive systems while enhancing the listening experience and giving into system reliability.

The TDA7801 features Advanced 6th generation BCD (bipolar-CMOS-DMOS) technology, High output power capability: up to 4 x 45 W, Full fault protection, Single-channel independent short-circuit protection, CMOS compatible enable pin (3.3/5 V), Optional non I2C bus mode, Thermal protection (four levels), Integrated 110 dB DAC, MOSFET power outputs, and etc. With an integrated DAC and a powerful MOSFET amplifier, the TDA7801 provides unprecedented audio performances. It can be applied to automotive head units, sound systems, and digital players.

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One more type of quadruple high-current half-H driver IC is discussed here. It is the SN754410. The main function of the IC is to convert low voltage, low current logic signals to high voltage, high current signals to directly drive a motor as mentioned in the previously article. The SN754410 is designed to provide bidirectional drive currents up to 1 A at voltages from 4.5 V to 36 V.

Seemed similar to the L293, but the SN754410 has Improved Functional Replacement for the SGS L293, No Output Glitch During Power Up or Power Down, Sink/Source Interlock Circuitry Prevents Simultaneous Conduction and Include both Half-H and Full-H Solenoid Drivers and Motor Drivers in its feature. Other features are relatively the same of this type of IC for example its Wide Supply-Voltage Range of 4.5 V to 36 V, Thermal Shutdown, TTL and CMOS-Compatible High-Impedance Diode-Clamped Inputs.

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