PIC16F73-I/SP - 8-Bit 20MHz Flash MCU | Microchip Technology
Référence : PIC16F73-I/SP ✓ ActifPIC16F73-I/SP Présentation
A microcontroller is a programmable semiconductor that integrates a processor core, memory, and peripherals into one device. The PIC16F73 belongs to the PIC16 family of 8-bit RISC microcontrollers and uses Flash memory for reusable application firmware. In the broader electronics hierarchy, it is a microcontroller IC rather than a discrete logic component, combining digital control, analog measurement, timing, and serial communication in a single package.
The PIC16F73-I/SP provides five 8-bit A/D channels for measuring analog signals, two additional timers beyond the basic timer resources, and two capture/compare/PWM modules. Its synchronous serial port can operate as either a three-wire SPI interface or a two-wire I2C bus, while a USART supports asynchronous serial communication. These peripherals reduce the need for external interface devices when connecting sensors, converters, displays, actuators, or other embedded-control equipment.
The -I/SP ordering combination identifies the industrial temperature grade, Flash-memory technology, and SPDIP package according to Microchip's part-number convention. The MCU is designed around an 8-bit PIC architecture and can operate at frequencies up to 20 MHz. Its five A/D channels are an important limitation to consider when comparing it with newer MCUs that offer higher converter resolution or more channels. The 4K x 14-word Flash organization determines the available instruction-word program capacity, while 192 bytes of RAM support working variables and stack-related storage requirements.
Typical uses include industrial controllers, motor and actuator control, data acquisition modules, instrumentation, appliance controls, and educational embedded systems. SPI or I2C connectivity allows the PIC16F73 to communicate with sensors and peripheral ICs, while USART connectivity is useful for host-controller links. The 28-pin SPDIP footprint also simplifies inspection, rework, and field replacement compared with fine-pitch surface-mount packages.
Designers should verify oscillator, reset, I/O, and programming details against the Microchip datasheet before replacing an existing PIC16C73-based design. Flash-versus-EPROM programming differences can require tooling or firmware changes even when the package and many peripheral functions are similar. The manufacturer documentation should also be consulted for exact peripheral mappings, electrical limits, and the device's specified operating temperature range.
This page consolidates verified manufacturer and distributor information, package-specific alternatives, comparative parameters, and practical replacement guidance. It is designed to help engineers distinguish true pin-compatible choices from functionally similar MCUs that may require firmware, tooling, or hardware changes.
Alternatives de remplacement direct pour PIC16F73-I/SP — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec PIC16F73-I/SP (même facteur de forme et même empreinte) — différant par Package, Timers, Core Architecture, Operating Temperature, RoHS Status.
PIC16F73-E/SP
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →PIC16C73B-04I/SP
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →PIC16F74-I/SP
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC16F76-I/SP
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →PIC16F73-I/SP Valeurs maximales et caractéristiques électriques
| Microcontroller Type | 8-bit PIC RISC Flash microcontroller |
| Fréquence d'horloge maximale | 20 MHz |
| Program Memory | 7 KB Flash (4K x 14 words) |
| RAM | 192 bytes |
| I/O Pin Count | 22 pins |
| Analog-to-Digital Channels | 5 channels |
| ADC Resolution | 8 bits |
| Additional Timers | 2 timers |
| Capture/Compare/PWM Functions | 2 functions |
| Synchronous Serial Interface | 3-wire SPI or 2-wire I2C |
| UART | 1 USART |
| Boîtier | 28-pin SPDIP |
| Type de montage | Through-hole |
| Temperature Grade | Industrial grade |
| Tension d'alimentation | 5 V |
Configuration des broches de PIC16F73-I/SP
| Broche 1 | MCLR/VPP — Master clear reset and programming voltage input |
| Broche 2 | RA0 — Port A input/output pin |
| Broche 3 | RA1 — Port A input/output pin |
| Broche 4 | RA2 — Port A input/output pin |
| Broche 5 | RA3 — Port A input/output pin |
| Broche 6 | RA4 — Port A input/output pin |
| Broche 7 | VSS — Ground reference |
| Broche 8 | RB0 — Port B input/output pin |
| Broche 9 | RB1 — Port B input/output pin |
| Broche 10 | RB2 — Port B input/output pin |
| Broche 11 | RB3 — Port B input/output pin |
| Broche 12 | RB4 — Port B input/output pin |
| Broche 13 | RB5 — Port B input/output pin |
| Broche 14 | RB6 — Port B input/output pin |
| Broche 15 | RB7 — Port B input/output pin |
| Broche 16 | VDD — Positive supply voltage |
| Broche 17 | OSC1 — Oscillator input |
| Broche 18 | OSC2 — Oscillator output |
| Broche 19 | RC0 — Port C input/output pin |
| Broche 20 | RC1 — Port C input/output pin |
| Broche 21 | RC2 — Port C input/output pin |
| Broche 22 | RC3 — Port C input/output pin |
| Broche 23 | RC4 — Port C input/output pin |
| Broche 24 | RC5 — Port C input/output pin |
| Broche 25 | TX — USART transmit output |
| Broche 26 | RC7 — Port C input/output pin |
| Broche 27 | SDI — Synchronous serial data input |
| Broche 28 | SDO — Synchronous serial data output |
Applications typiques
PIC16F73-I/SP convient pour 6 applications: Industrial Sensor Interface, Motor and Actuator Control, Instrumentation and Data Logging, Appliance and Environmental Control, Communication Gateway, Legacy Control-System Retrofit.
Industrial Sensor Interface
PIC16F73-I/SP fits an industrial sensor interface because it combines five 8-bit A/D channels with configurable SPI or I2C communication in a 28-pin SPDIP package. The MCU can sample external transducers, process the readings, and forward measurements through I2C, SPI, or USART to a supervisory controller. Its 20 MHz maximum clock supports responsive interrupt-driven acquisition, while the -I ordering indicates an industrial-grade option that should be checked against the required ambient range. The main design trade-off is converter resolution: five 8-bit channels may require external amplification or higher-resolution conversion when the measured signals have narrow spans.
Recommandé
Motor and Actuator Control
PIC16F73-I/SP is appropriate for basic motor, valve, and relay-control systems because it provides two additional timers, two capture/compare/PWM functions, and up to 22 I/O pins. Engineers can use timer-driven PWM for actuator modulation, capture inputs for position or speed feedback, and GPIO for drivers or interlocks. Operation up to 20 MHz provides processing margin for closed-loop routines, although actual PWM frequency and resolution depend on timer configuration. Because this is a general-purpose 8-bit MCU, motor protection, current sensing, and switching-device drive must be implemented with appropriate external hardware.
Recommandé
Instrumentation and Data Logging
PIC16F73-I/SP can serve as the control and communications core of compact instrumentation because it integrates five analog inputs, 192 bytes of RAM, serial peripherals, and Flash firmware in one 28-pin device. A logger can sample enabled channels, format measurements locally, and stream records through USART or a configured SPI/I2C link. The 4K x 14-word Flash organization supports a focused embedded application, while the 20 MHz clock allows efficient interrupt handling. For long-term records, designers should add external nonvolatile storage and account for the limited RAM, and they should use the SPI interface when deterministic transfer timing is important.
Recommandé
Appliance and Environmental Control
PIC16F73-I/SP suits appliance and environmental controllers where a compact through-hole MCU must manage switches, sensors, and serial accessories. Its 22 available I/O pins support keys, display indicators, relay drivers, and status inputs, while the five-channel 8-bit ADC can monitor temperature, illumination, or analog level sensors. The industrial -I ordering is relevant for equipment exposed to variable ambient conditions, but the exact operating-temperature limits must be checked in the Microchip documentation. Compared with a surface-mount MCU, the 28-pin SPDIP package also simplifies hand soldering, socketed maintenance, and field replacement.
Recommandé
Communication Gateway
PIC16F73-I/SP can act as a compact embedded communication gateway because its synchronous serial port can be configured for either 3-wire SPI or 2-wire I2C, and the device also includes a USART. A gateway can translate between one serial protocol and another, manage device addressing, or bridge a sensor network to a host controller. The 20 MHz maximum clock supports protocol handling, but its 192 bytes of RAM and 4K x 14-word Flash capacity constrain buffering and application complexity. For sustained data flow, use DMA-equivalent streaming practices, interrupt-driven transfers, or an external communications controller if packet buffering requirements exceed the MCU resources.
Recommandé
Legacy Control-System Retrofit
PIC16F73-I/SP is particularly useful when retrofitting a legacy 28-pin control board because the SPDIP package supports through-hole soldering, socketed installation, and field replacement without hot-air rework. Existing PIC16F73-oriented firmware can reuse the documented 8-bit architecture, Flash programming model, and core peripheral resources, provided the board revision, oscillator, reset circuit, and I/O mapping match. The five 8-bit A/D channels support legacy sensing functions, and the 20 MHz maximum frequency preserves timing headroom. A migration should nevertheless be validated at the system level because oscillator configuration, startup behavior, and watchdog or brownout settings can affect older equipment.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC16F73-I/SP — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC16F73-E/SP | PIC16C73B-04I/SP | PIC16F74-I/SP | PIC16F76-I/SP |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-pin SPDIP | 28-pin SPDIP | 28-pin SPDIP | 28-pin SPDIP | 28-pin SPDIP |
Principaux différenciateurs
- Higher documented clock ceiling than the PIC16C73B candidate (vs PIC16C73B-04I/SP)
- Direct same-family grade alternative (vs PIC16F73-E/SP)
- Documented peripheral set in an inspection-friendly package (vs PIC16F74-I/SP)
Notes de conception
Do not treat Flash PIC16F73 devices as programming-compatible with older EPROM PIC16C73 devices without checking the programming toolchain and device support. A Flash-based replacement can match the 28-pin outline while requiring different erase, programming, and configuration procedures. Review the Microchip pin and code compatibility chart and the manufacturer programming documentation before purchasing substitutes for an existing production board.
Confirm the oscillator, reset, I/O, and supply pins against the exact 28-pin datasheet diagram before reusing a legacy schematic. The MCU operates at 5 V in the verified data, but input levels, I/O drive capability, and maximum pin currents must be checked directly. In a retrofit, pay particular attention to MCLR/VPP sharing, oscillator configuration, decoupling placement, and any external components connected to programming or reset pins.
Keep the 20 MHz clock path compact and isolate it from analog and communication traces. Route oscillator traces away from sensitive analog inputs, use a short ground return, and maintain suitable copper spacing around the SPDIP pins. If SPI, I2C, or USART lines leave the board, consider controlled-impedance routing or appropriate termination based on edge rate and cable length rather than treating every serial interface as a low-frequency control signal.
Informations de conformité
The supplied verified data does not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Compliance values remain unknown rather than being inferred from the manufacturer, package, or distributor listing.
