PIC16C62A-04/SP
PIC16C62A-04/SP - 8-bit 4MHz 3.5KB OTP MCU | Microchip | 28-SPDIP
The Microchip Technology PIC16C62A-04/SP is an 8-bit CMOS OTP (One-Time-Programmable) RISC microcontroller in the PIC16C family, built around the PIC16C6x core and offered in a 28-pin SPDIP (Skinny Plastic DIP) through-hole package. It operates at a maximum clock speed of 4 MHz, integrates 3.5 KB of OTP program memory (organized as 2K × 14 words), and includes 128 bytes of RAM with 22 general-purpose digital I/O pins. The device uses CMOS EPROM/ROM technology, is fully static, and supports a wide operating voltage range up to 6.0 V across commercial, industrial, and extended temperature grades.
An 8-bit OTP microcontroller is a single-chip computer built on an 8-bit data path with non-volatile program memory that can be written exactly once by the user. These devices sit inside the broader hierarchy of microcontrollers → embedded processors → semiconductor ICs, and historically dominated cost-sensitive, mid-volume embedded control applications before Flash-based MCUs became economical. The PIC16C family is part of Microchip's PIC16 → PICmicro → 8-bit MCU taxonomy, which uses a RISC-style instruction set designed for deterministic, single-cycle execution on most opcodes.
Key features of the PIC16C62A-04/SP include 35 single-word instructions, a 14-bit instruction word, 8-bit data path, 4 MHz oscillator input, on-chip peripherals such as timers, a watchdog timer, and a synchronous/asynchronous serial port (SSP). Power consumption is a notable feature: typical supply current is approximately 15 µA at 5 V / 4 MHz and around 1 µA at 3 V / 32 kHz, supporting battery-friendly designs. The 28-SPDIP package provides a 0.300 inch (7.62 mm) row spacing, which is convenient for prototyping, breadboarding, and educational use.
Architecturally, the PIC16C62A-04/SP uses a Harvard memory layout (separate program and data buses) and a fully static design that allows the clock to be stopped without losing register state. Its OTP EPROM cell technology is the main reason the part is positioned at lower price points than equivalent Flash-based PIC16F devices, but it also means firmware cannot be rewritten in-circuit; programming is performed with a device programmer such as the MPLAB PM3.
Typical applications include blood-pressure monitors and other low-power medical instruments, appliance controls, automotive body and comfort subsystems, consumer electronics, security and alarm panels, and industrial sensor interfaces. The combination of low power consumption, deterministic core, and DIP package makes the PIC16C62A-04/SP a frequent choice for legacy designs, hobby projects, and through-hole industrial control modules.
When designing with this part, the OTP memory limitation is the most important trade-off: once programmed, the device cannot be re-flashed. Engineers should validate firmware with a socketed or windowed version, or consider the pin-compatible PIC16F62A / PIC16F72 family for in-circuit reprogrammability. Decoupling, oscillator layout, and MCLR reset hardware should follow Microchip's PIC16C6x reference design recommendations.
This page synthesizes distributor pricing from DigiKey and Mouser, drop-in same-package alternatives, and practical design notes that are not collected in the manufacturer datasheet PDF, helping engineers select, source, and qualify the part quickly.
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