AT89S52 Microcontroller Features : • A U (Central Processing Unit) 8 Bit. • 256 bytes of RAM (Random Access Memory) internally. • Four-port I / O, which each consist of eight bits • the internal oscillator and timing circuits. • Two timer / counters 16 bits • Five interrupt lines (two fruits and three external interrupt internal interruptions). • A serial port with full duplex UART (Universal Asynchronous Receiver Transmitter). • Able to conduct the process of multiplication, division, and Boolean. • the size of 8 KByte EPROM for program memory. • Maximum speed execution of instructions per cycle is 0.5 s at 24 MHz clock frequency. If the microcontroller clock frequency used is 12 MHz, the speed is 1 s instruction execution L293D Wide Supply-Voltage Range: 4.5 V to 36 V Separate Input-Logic Supply Internal ESD Protection Thermal Shutdown High-Noise-Immunity Inputs Functionally Similar to SGS L293 and
SGS L293D
Output Current 1 A Per Channel (600 mA for L293D) Peak Output Current 2 A Per Channel (1.2 A for L293D) Output Clamp Diodes for Inductive Transient Suppression (L293D
LM324 • Short Circuited Protected Outputs • True Differential Input Stage
• Single Supply Operation: 3.0 V to 32 V • Low Input Bias Currents: 100 nA Maximum (LM324A) • Four Amplifiers Per Package • Internally Compensated • Common Mode Range Extends to Negative Supply • Industry Standard Pinouts • ESD Clamps on the Inputs Increase Ruggedness without Affecting Device Operation • These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant • NCV Prefix for Automotive and Other Applications Requiring Site and Control Changes