PIC16LC72-04I/SP
PIC16LC72-04I/SP - 8-Bit 4MHz 3.5KB OTP MCU 22 I/O | Microchip
The Microchip Technology PIC16LC72-04I/SP is an 8-bit CMOS microcontroller from the PIC16C mid-range family, operating at up to 4 MHz and offering 3.5 KB (2K x 14) of One-Time-Programmable (OTP) program memory plus 128 bytes of RAM, housed in a 28-pin SPDIP (Skinny Plastic DIP, 0.300 inch / 7.62 mm) through-hole package. Per the manufacturer datasheet, the device integrates five channels of 8-bit A/D conversion, 22 digital I/O lines, three timers (Timer0 8-bit, Timer1 16-bit, Timer2 8-bit), and an I2C/SPI-compatible synchronous serial port, with brown-out detect, power-on reset, watchdog timer, and PWM peripherals for embedded control loops.
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral interfaces onto one die. The PIC16LC72-04I/SP belongs to the Microchip PIC16C mid-range architecture, itself part of the broader PIC® 8-bit MCU family, which sits hierarchically under the category of microcontrollers -> integrated circuits -> semiconductors. The 'LC' suffix designates the low-voltage CMOS variant, optimized for operation from 2.5 V to 5.5 V supplies, making it well suited to battery-powered or energy-conscious designs.
Key features of the PIC16LC72-04I/SP include the integrated 5-channel 8-bit ADC, which lets the MCU read analog sensors without an external converter, and the Synchronous Serial Port (SSP) supporting both SPI (master/slave) and I2C (slave) modes for connecting EEPROMs, sensors, or display drivers. Brown-Out Reset (BOR) and Power-On Reset (POR) ensure deterministic startup, while the Watchdog Timer (WDT) recovers the system from software lockups. PWM outputs enable direct control of motors, LEDs, or simple audio tones without CPU overhead.
The architecture uses a Harvard-style 14-bit instruction word optimized for compact code density, with 35 single-word instructions. Static CMOS design allows the clock to be stopped without losing register contents, enabling ultra-low-power sleep modes ideal for intermittently sampled sensor nodes.
Typical applications for the PIC16LC72-04I/SP include industrial sensor interface boards, low-cost motor and stepper controllers, simple appliance controls, and educational/development platforms that benefit from the classic PIC mid-range toolchain (MPASM, MPLAB IDE) and In-Circuit Serial Programming (ICSP).
When designing with this part, note that OTP memory is one-time programmable; for prototyping or firmware revisions, consider the PIC16F72 (Flash) sibling that shares the same 28-pin SPDIP footprint and peripheral set. Decoupling capacitors (100 nF) should be placed close to VDD/VSS, and unused I/O pins configured as outputs low to minimize quiescent current draw.
This page consolidates distributor pricing, OTP vs Flash trade-offs, drop-in alternatives, and PCB-level design guidance not found in the manufacturer datasheet, giving procurement and engineering teams a single decision-ready reference.
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