PIC16C73A-04I/SO - 8-bit OTP MCU, 4MHz, 7KB, 28-SOIC | Microchip
MPN: PIC16C73A-04I/SO ✗ Cuối đờiPIC16C73A-04I/SO Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (here OTP EPROM), volatile data memory (RAM), peripherals, and I/O on one die. The PIC16C7X mid-range family was designed as low-cost, high-performance, fully-static CMOS MCUs for embedded control, and the PIC16C73A-04I/SO sits between the smaller PIC16C72 (28-pin) and the larger PIC16C74A/76/77 (40-pin) variants, sharing the same peripheral set so code can scale across packages.
Key features of the PIC16C73A-04I/SO include 7KB of one-time-programmable (OTP) EPROM, 192 bytes of data RAM, 22 general-purpose I/O pins with 25 mA source/sink capability, an 8-channel 8-bit A/D converter, a USART for asynchronous/synchronous serial, an SSP module supporting SPI and I2C, and a 25 mA sink/source current suitable for driving LEDs and small relays directly. It also supports industrial temperature range (-40C to +85C) and a low-power standby current of approximately 1 uA typical at 3V/32 kHz.
The PIC16C73A-04I/SO is built on a fully-static CMOS process, which means the clock can be stopped and the device held in its current state without losing register contents - useful for power-saving designs. The 4 MHz "-04" speed grade delivers 4 million instructions per second (Fosc/4) with a 1 us instruction cycle, and the wide operating voltage range (2.5V to 6.0V for the broader family, 4V to 5.5V for this industrial-temperature grade) makes it suitable for 5V industrial buses.
Typical applications include industrial control panels, sensor interface boards, motor-control front-ends (with the CCP module for PWM), low-cost consumer appliances, and embedded instrumentation. The integrated 8-bit ADC simplifies analog front-ends, while the USART enables RS-232/RS-485 communication without an external transceiver IC for short-distance links.
When designing with this part, note that OTP (one-time-programmable) memory cannot be erased or rewritten - use the PIC16F73 (Flash) or PIC16C73B (improved revision) for development or any application requiring firmware updates in the field. The "I" suffix denotes the industrial temperature range (-40C to +85C); the "SO" suffix indicates 28-pin SOIC packaging.
This page synthesizes distributor stock and pricing, same-package drop-in alternatives including newer revision and Flash-based variants, and practical design notes not collected in any single source.
Bộ thay thế dễ dàng lắp đặt cho PIC16C73A-04I/SO — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC16C73A-04I/SO (cùng hình factor và footprint) — khác nhau ở Package, Program Memory Type, ADC, Timers, Program Memory Size.
PIC16C73B-04I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C73A-04I/SP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C73A-10I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F73-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C73A-04E/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C73A-04I/SO Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC16CXX mid-range, 8-bit RISC |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 7KB (4K x 14 words) |
| Data RAM | 192 bytes |
| Data EEPROM | Not present |
| Maximum CPU Speed | 4 MHz (1 us instruction cycle) |
| Operating Voltage | 4 V to 5.5 V |
| I/O Pins | 22 |
| A/D Converter | 8 channels, 8-bit resolution |
| Timers | Two 8-bit + one 16-bit with CCP |
| Communication Peripherals | USART (AUSART), SSP (SPI / I2C) |
| I/O Sink/Source Current | 25 mA / 25 mA |
| Standby Current | 1 uA typical at 3 V / 32 kHz |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial, "I" suffix) |
| Hộp | 28-pin SOIC (SO), 7.50 mm body width |
| Kiểu lắp đặt | Surface Mount |
| Instruction Set | 35 single-word instructions, all single-cycle except branches |
Cấu hình chân PIC16C73A-04I/SO
| Chân 1 | MCLR/VPP — Master Clear (Reset) input / Programming voltage input |
| Chân 2 | RA0/AN0 — PORTA bit 0 / Analog input channel 0 |
| Chân 3 | RA1/AN1 — PORTA bit 1 / Analog input channel 1 |
| Chân 4 | RA2/AN2/VREF- — PORTA bit 2 / Analog input channel 2 / ADC negative reference |
| Chân 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input channel 3 / ADC positive reference |
| Chân 6 | RA4/T0CKI — PORTA bit 4 (open-drain) / Timer0 clock input |
| Chân 7 | RA5/AN4/SS — PORTA bit 5 / Analog input channel 4 / SPI Slave Select |
| Chân 8 | VSS — Ground reference |
| Chân 9 | OSC1/CLKIN — Oscillator crystal input / External clock input |
| Chân 10 | OSC2/CLKOUT — Oscillator crystal output / Clock output (Fosc/4) |
| Chân 11 | RC0 — PORTC bit 0 |
| Chân 12 | RC1 — PORTC bit 1 |
| Chân 13 | RC2 — PORTC bit 2 |
| Chân 14 | RC3 — PORTC bit 3 |
| Chân 15 | RC4 — PORTC bit 4 |
| Chân 16 | RC5 — PORTC bit 5 |
| Chân 17 | RC6 — PORTC bit 6 / USART TX |
| Chân 18 | RC7 — PORTC bit 7 / USART RX |
| Chân 19 | VSS — Ground reference |
| Chân 20 | VDD — Positive supply voltage (4V to 5.5V) |
| Chân 21 | RB0/INT — PORTB bit 0 / External interrupt input |
| Chân 22 | RB1 — PORTB bit 1 |
| Chân 23 | RB2 — PORTB bit 2 |
| Chân 24 | RB3 — PORTB bit 3 |
| Chân 25 | RB4 — PORTB bit 4 |
| Chân 26 | RB5 — PORTB bit 5 |
| Chân 27 | RB6 — PORTB bit 6 |
| Chân 28 | RB7 — PORTB bit 7 |
Ứng dụng tiêu biểu
PIC16C73A-04I/SO phù hợp cho 6 Áp dụngs: Industrial Sensor Interface Board, Low-Cost Consumer Appliance Controller, Motor Control PWM Front-End, Embedded Data Acquisition Module, Automotive Body Electronics (Legacy), Educational Microcontroller Trainer.
Industrial Sensor Interface Board
The PIC16C73A-04I/SO fits industrial sensor interface boards because its 8-channel 8-bit A/D converter directly digitizes up to eight analog sensor channels (temperature, pressure, level) without an external ADC, and its 22 I/O lines handle discrete inputs, relay outputs, and indicator LEDs. The integrated USART connects to RS-485 transceivers for industrial fieldbus, and the 4 MHz instruction cycle provides 1 us deterministic response for time-critical control loops. Its 4V-5.5V supply matches 5V industrial rails, and the -40C to +85C industrial temperature grade handles factory-floor environments.
Được đề xuất
Low-Cost Consumer Appliance Controller
The PIC16C73A-04I/SO is well-suited to consumer appliance controllers (coffee machines, washing machine control boards, microwave user interfaces) because its 25 mA I/O sink/source current drives triac optocouplers, LED indicators, and 7-segment displays directly, eliminating driver transistors. The 7KB OTP memory holds state-machine control firmware, the USART links to an inverter panel display module, and the SSP/I2C bus connects to EEPROM for user presets. Fully-static CMOS design with 1 uA standby supports battery-backed clock and timer functions across power cycles.
Được đề xuất
Motor Control PWM Front-End
The PIC16C73A-04I/SO serves as a motor-control PWM front-end by leveraging its 16-bit timer with Capture/Compare/PWM (CCP) module to generate PWM signals up to 10-bit resolution at the 4 MHz instruction rate. The 8-bit ADC samples motor current through a shunt amplifier for closed-loop current control, while the USART feeds back telemetry to a master controller. Industrial temperature rating and 5V tolerance match automotive and industrial 12V/24V bus environments when paired with appropriate TVS protection.
Được đề xuất
Embedded Data Acquisition Module
The PIC16C73A-04I/SO is used in embedded data-acquisition modules where its 8-channel 8-bit ADC scans analog inputs at the 4 MHz instruction rate, storing samples in the 192-byte RAM buffer before burst transmission via USART to a host. The 35 single-word instruction set keeps the C/assembly firmware compact (well under 7KB), and the wide operating voltage (4V-5.5V) lets the module share power with the host 5V rail. Low 1 uA standby enables sleep-mode operation between scheduled acquisitions, useful for battery-powered field loggers.
Được đề xuất
Automotive Body Electronics (Legacy)
The PIC16C73A-04I/SO has been used in legacy automotive body electronics (HVAC panel controllers, lighting modules, instrument-cluster slaves) where its 5V-tolerant I/O directly drives 12V relay coils via transistors and its industrial temperature range covers cabin environments. The integrated USART daisychains multiple PIC slaves to a central body controller, and the 8-bit ADC reads switch positions and potentiometers. Note: for new automotive designs requiring AEC-Q100 qualification, migrate to PIC16F73 or modern dsPIC33/PIC18 successors with full automotive certification.
Được đề xuất
Educational Microcontroller Trainer
The PIC16C73A-04I/SO is a popular subject for educational microcontroller trainers and university embedded-systems labs because the PIC16C7X mid-range architecture is simple enough for beginners (35 instructions, single-cycle execution) yet rich enough to teach real peripherals (ADC, USART, I2C, timers, PWM). Its 28-SOIC package is breadboard-friendly with an SOIC-to-DIP adapter, MPLAB X IDE and the XC8 compiler are free, and the PICkit 3 programmer supports in-circuit debugging of the family. The 7KB program memory is sufficient for multi-week lab assignments and capstone projects.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C73A-04I/SO — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC16C73B-04I/SO | PIC16C73A-04I/SP | PIC16C73A-10I/SO | PIC16F73-I/SO | PIC16C73A-04E/SO |
|---|---|---|---|---|---|---|
| Package | 28-SOIC | 28-SOIC (same) | 28-SPDIP (through-hole) | 28-SOIC (same) | 28-SOIC (same) | 28-SOIC (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 7KB OTP | 7KB OTP | 7KB OTP | 7KB OTP | 4KB Flash | 7KB OTP |
| Max CPU Speed | 4 MHz | 4 MHz | 4 MHz | 10 MHz | 20 MHz | 4 MHz |
| Temperature Range | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C (Extended) |
| I/O Pins | 22 | 22 | 22 | 22 | 22 | 22 |
| ADC | 8 ch, 8-bit | 8 ch, 8-bit | 8 ch, 8-bit | 8 ch, 8-bit | 8 ch, 8-bit | 8 ch, 8-bit |
| Memory Type | OTP (one-time programmable) | OTP | OTP | OTP | Flash (reprogrammable) | OTP |
| Peripherals | USART, SSP/SPI/I2C, CCP | USART, SSP/SPI/I2C, CCP | USART, SSP/SPI/I2C, CCP | USART, SSP/SPI/I2C, CCP | USART, SSP/SPI/I2C, CCP + ICSP | USART, SSP/SPI/I2C, CCP |
Bảo phân biệt quan trọng
- Revised silicon with errata fixes in same package (vsPIC16C73B-04I/SO)
- Flash-based reprogrammability with same peripherals (vsPIC16F73-I/SO)
- Higher CPU speed grade available in identical package (vsPIC16C73A-10I/SO)
Ghi chú thiết kế
PIC16C73A-04I/SO uses OTP (one-time-programmable) EPROM - firmware cannot be erased or rewritten after programming. Plan prototypes carefully: any firmware bug requires throwing away the MCU and starting with a fresh part. For development and field-updateable designs, use the Flash-based PIC16F73 instead, which is pin-compatible in the same 28-SOIC package.
Estimated: at VDD=5V and Fosc=4 MHz, the PIC16C73A-04I/SO typically draws about 2-5 mA active and 1 uA in sleep mode. Add a 100 nF decoupling capacitor as close to the VDD pin (pin 20) as possible, plus a bulk 10 uF tantalum or aluminum polymer capacitor near the supply pins. The MCLR/VPP pin (pin 1) should be pulled up through a 10 kohm resistor to VDD, with a 100 nF cap to ground for noise filtering.
At maximum 4 MHz operation and 5V supply, the PIC16C73A-04I/SO dissipates roughly 25 mW internally (estimated from datasheet DC characteristics), well within the 28-SOIC thermal envelope of approximately 80 C/W. The industrial -40C to +85C operating range is achievable without special PCB thermal relief in most designs. For continuous high-temperature operation above 70C ambient, provide a small copper pour connected to VSS pins (8 and 19) to share heat dissipation across both ground pins.
Thông tin tuân thủ
RoHS, REACH, lead-free, and halogen-free status not explicitly stated in the provided web snippets. As of 2026-09-18, Microchip's product page for PIC16C73A recommends migrating to PIC16C73B or PIC16F73 - request latest material declaration sheets from Microchip directly for compliance certificates. Part is NRND, not AEC-Q100 qualified.
