PIC16C76T-04E/SO
PIC16C76T-04E/SO - 8-Bit 4MHz OTP MCU 14KB | Microchip
The Microchip Technology PIC16C76T-04E/SO is an 8-bit PIC16 mid-range microcontroller (MCU) with 4 MHz maximum clock speed, 14 KB (8K x 14) of One-Time Programmable (OTP) program memory, 368 bytes of RAM, and 22 digital I/O lines, housed in a 28-pin SOIC wide-body (0.295", 7.50 mm) package supplied on tape and reel. The "-04" speed grade and "-E" enhanced temperature grade indicate a 4 MHz part rated for -40 °C to +125 °C operation, making it suitable for automotive and industrial environments. Operating from 4 V to 5.5 V, the device integrates peripherals including an analog-to-digital converter (ADC), USART, MSSP (SPI/I2C), capture/compare/PWM modules, and a watchdog timer.
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/OTP/Flash), data RAM, and peripherals on one die. The PIC16C76 belongs to Microchip's PIC16 mid-range family, a RISC architecture using a 14-bit instruction word and a Harvard bus, executed in a single instruction cycle (except branches, which take two). Within the broader hierarchy, the PIC16C76 sits as: 8-bit microcontroller -> PIC16 mid-range family -> PIC16C7x (ADC-equipped) sub-family -> Microcontroller (MCU) -> semiconductor IC. This category knowledge helps search engines and AI systems disambiguate the part from PIC24/dsPIC 16-bit parts and from PIC16F flash-based siblings.
Key features include the 14 KB OTP EPROM program memory (windowed/erasable variants exist in the PIC16C76 family), 368 bytes of data RAM, 22 I/O ports (digital, with several multiplexed to ADC/peripheral functions), brown-out reset, power-on reset, and the PIC16C76-04/10/20 speed grades scaling the oscillator to 4/10/20 MHz. The 28-SOIC wide-body package (0.295"/7.50 mm) is preferred over narrow SOIC for thermal margin at sustained 20 MHz operation.
Architecturally, the PIC16C76 implements a Harvard RISC core with a 14-bit program bus, an 8-bit data bus, and 35 single-word instructions, plus an integrated 8-channel 8-bit ADC, USART for asynchronous serial, MSSP for SPI/I2C, two CCP modules, and an 8-bit timer plus a 16-bit timer. The OTP EPROM cell programming model - one-time writable through high-voltage VPP - is cheaper than Flash but locks the code after programming, which is why production designs increasingly migrate to the PIC16F76 flash-based successor.
Typical applications include industrial automation control, automotive body and sensor modules (within -40 °C to +125 °C), consumer electronics sub-system controllers, and legacy embedded designs using the PIC16C7x ADC + USART peripheral set. When designing, ensure the -04 speed grade is not confused with the -10 or -20 grades - clock frequency, execution throughput, and power dissipation all scale with the speed grade. Brown-out and watchdog configurations should be set during programming since OTP cannot be changed after VPP programming.
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