PIC16F873AT-E/ML - 8-Bit MCU, 20MHz, 7KB Flash, 28-QFN | Microchip
Référence : PIC16F873AT-E/ML ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $7.1 | $7,10 |
| 10 | $6.4 | $64,00 |
| 100 | $5.62 | $562,00 |
| 500 | $4.97 | $2 485,00 |
| 1 000 | $4.45 | $4 450,00 |
PIC16F873AT-E/ML Présentation
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data memory, and peripheral interfaces on one silicon die. Within the broader taxonomy, MCUs sit inside the integrated circuits family, alongside memory ICs and logic ICs, and they form the lowest-level decision-making nodes in embedded systems ranging from consumer appliances to industrial controllers. The PIC16 mid-range family, introduced by Microchip, uses a Harvard architecture with separate program and data buses, enabling single-cycle instruction fetch and predictable deterministic timing. The PIC16F873A specifically targets applications needing moderate memory, on-chip EEPROM for parameter storage, and the standard set of serial communication peripherals.
Key features of the PIC16F873AT-E/ML include a 20MHz maximum clock (200ns instruction cycle), 14-bit instruction word, 8-level hardware stack, 5 channels of 10-bit ADC, two 8-bit timers plus one 16-bit timer, a capture/compare/PWM module, and the standard PIC16F mid-range peripheral set. The extended (E) temperature grade and tape-and-reel (T) packaging designation indicate this variant is rated for -40C to +125C operation and supplied on reel for high-volume SMT assembly lines.
Architecturally, the PIC16F873A uses Microchip's enhanced mid-range 14-bit core with hardware multiplier support, 35 single-word instructions, and up to 8K x 14 words of linear program memory addressing. In-system programming via ICSP allows firmware updates after PCB assembly, while the integrated brown-out reset and watchdog timer increase robustness in unattended industrial installations.
Typical applications include industrial automation sensors, motor control driver boards, HVAC thermostats, automotive body electronics subsystems, and consumer white-goods user interfaces. The combination of on-chip EEPROM, ADC, and three serial interfaces supports complete subsystem designs without external peripheral ICs.
When designing with this part, allocate the 28-QFN exposed pad to a continuous ground plane for thermal relief and consider the PICkit 5 or ICD 4 programmer for in-circuit debugging. The 192-byte SRAM limits complex protocol stacks, so plan for application code that uses stack-efficient algorithms.
This page synthesizes distributor pricing, drop-in same-package alternatives from the PIC16 family, and practical design notes not collated in the manufacturer datasheet alone.
Alternatives de remplacement direct pour PIC16F873AT-E/ML — 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 PIC16F873AT-E/ML (même facteur de forme et même empreinte) — différant par Package, Timers, Core Architecture, Operating Temperature Range, Serial Interfaces.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC16F873A-I/ML
✅ Remplacement direct✓ En stock
$2.32 / unité
Voir la fiche technique →PIC16F873A-E/ML
✅ Remplacement direct✓ En stock
$3.35 / unité
Voir la fiche technique →PIC16F873A-I/SS
✅ Remplacement direct✓ En stock
$1.78 / unité
Voir la fiche technique →PIC16F876AT-E/ML
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC16F873AT-E/ML Valeurs maximales et caractéristiques électriques
| Core Architecture | PIC16 Enhanced Mid-Range 8-bit |
| Program Memory (FLASH) | 7 KB (4K x 14 words) |
| RAM Size | 192 bytes |
| EEPROM Size | 128 bytes |
| Maximum CPU Frequency | 20 MHz |
| Instruction Cycle Time | 200 ns |
| Number of I/O Pins | 22 |
| ADC | 10-bit, 5 channels |
| Timers | 2 x 8-bit, 1 x 16-bit |
| Capture/Compare/PWM | 1 CCP module |
| Serial Interfaces | I2C, SPI, UART/USART |
| Plage de température de fonctionnement | -40C to +125C (E grade) |
| Boîtier | 28-QFN (6x6 mm) with exposed pad |
| Type de montage | Surface Mount |
| Programming Interface | ICSP (In-Circuit Serial Programming) |
| Statut RoHS | Compliant |
Configuration des broches de PIC16F873AT-E/ML
| Broche 1 | MCLR/VPP — Master Clear (reset) input / programming voltage |
| Broche 2 | RA0/AN0 — PORTA bit 0 / analog input channel 0 |
| Broche 3 | RA1/AN1 — PORTA bit 1 / analog input channel 1 |
| Broche 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / ADC VREF- |
| Broche 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC VREF+ |
| Broche 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Broche 7 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / SPI slave select |
| Broche 8 | VSS — Ground |
| Broche 9 | OSC1/CLKI — Crystal oscillator input / external clock |
| Broche 10 | OSC2/CLKO — Crystal oscillator output |
| Broche 11 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / clock input |
| Broche 12 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| Broche 13 | RC2/CCP1 — PORTC bit 2 / Capture-Compare-PWM 1 |
| Broche 14 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Broche 15 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Broche 16 | RC5/SDO — PORTC bit 5 / SPI data out |
| Broche 17 | RC6/TX/CK — PORTC bit 6 / UART TX / clock |
| Broche 18 | RC7/RX/DT — PORTC bit 7 / UART RX / data |
| Broche 19 | VSS — Ground (second pad on QFN) |
| Broche 20 | VDD — Positive supply |
| Broche 21 | RB0/INT — PORTB bit 0 / external interrupt |
| Broche 22 | RB1 — PORTB bit 1 |
| Broche 23 | RB2 — PORTB bit 2 |
| Broche 24 | RB3/PGM — PORTB bit 3 / low-voltage programming |
| Broche 25 | RB4 — PORTB bit 4 |
| Broche 26 | RB5 — PORTB bit 5 |
| Broche 27 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Broche 28 | RB7/PGD — PORTB bit 7 / ICSP data |
| Broche EP | EP — Exposed thermal pad (connect to VSS) |
Applications typiques
PIC16F873AT-E/ML convient pour 6 applications: Industrial Sensor Interface Module, HVAC Thermostat Controller, Automotive Body Electronics, Consumer White-Goods User Interface, Motor Control and PWM Driver Board, Battery-Operated Remote Control.
Industrial Sensor Interface Module
The PIC16F873AT-E/ML's 10-bit 5-channel ADC, 192-byte RAM, and I2C/SPI peripherals make it well-suited for multi-sensor data acquisition front-ends. Engineers can sample four 4-20mA loop sensors, store calibration constants in 128-byte EEPROM, and forward readings via UART to a master PLC. The 20MHz CPU handles 200ns instruction cycles, comfortably running oversampling averaging routines at 1kHz update rates while leaving headroom for digital filtering. The 22 GPIO pins provide dedicated chip-select lines for SPI sensors plus interrupt inputs, and the E-grade -40C to +125C rating tolerates factory-floor cabinet temperatures without derating. Integrated peripherals eliminate the need for an external ADC or EEPROM, reducing BOM cost in volume deployments.
Recommandé
HVAC Thermostat Controller
The PIC16F873AT-E/ML serves as the central controller in residential and commercial HVAC thermostats, where the on-chip 10-bit ADC digitizes thermistor or RTD temperature sensors while the 16-bit timer drives PWM outputs for proportional valve control. The integrated UART/USART enables communication with Wi-Fi or sub-GHz wireless modules for smart-thermostat connectivity, and the 128-byte EEPROM stores user schedules and calibration data across power cycles. The CCP module generates precise PWM frequencies for triac-fired heater banks, and the E temperature grade supports outdoor unit installations where ambient swings between -20C and +70C are routine.
Recommandé
Automotive Body Electronics
The PIC16F873AT-E/ML's extended -40C to +125C operating range and 22 GPIO channels suit automotive body-control modules such as seat controllers, mirror adjusters, and lighting drivers. The CCP module generates PWM dimming signals for interior ambient lighting, while the UART interfaces with the vehicle's LIN or CAN network through an external transceiver. The 7KB flash holds a state-machine driver plus diagnostic routines, and 192-byte RAM supports small protocol buffers. Hardware watch-dog and brown-out reset increase robustness against automotive cranking-voltage transients and EMC events.
Recommandé
Consumer White-Goods User Interface
Washing machines, dishwashers, and microwave ovens use the PIC16F873AT-E/ML as the front-panel UI controller, where it scans capacitive or resistive touch keypads, drives 7-segment or LCD displays via I2C expanders, and exchanges commands with the appliance's main power board over UART. The 128-byte EEPROM stores user presets and fault logs through power cycles, while the 10-bit ADC reads load-cell signals for weight-sensing washers. The 20MHz CPU runs the UI task loop and the appliance-state machine within the 200ns instruction-cycle budget.
Recommandé
Motor Control and PWM Driver Board
The PIC16F873AT-E/ML drives small DC and stepper motors in fans, pumps, and valve actuators using its 16-bit timer and CCP module for center-aligned PWM at frequencies up to 20kHz. The 5-channel ADC samples motor current via shunt resistors for closed-loop torque or speed control, while the UART exposes diagnostic telemetry to a host controller. The QFN package's exposed thermal pad dissipates up to 1W, sufficient for the MCU core alone when peripherals are lightly loaded. The 22 GPIO lines allocate channels for direction-control H-bridges, tachometer feedback, and fault inputs.
Recommandé
Battery-Operated Remote Control
The PIC16F873AT-E/ML fits handheld IR/RF remote controls where its low-power sleep modes extend battery life to multi-year timescales. The 128-byte EEPROM stores pairing codes and device profiles, while the UART/USART drives 38kHz IR transmitters or 2.4GHz transceivers like the MRF24J40. The 22 GPIO scan a 5x5 keypad matrix and drive LED status indicators via PWM dimming. The 7KB flash accommodates menu-tree state machines plus the IR protocol library (RC5, NEC, SIRC). Surface-mount 28-QFN minimizes PCB area in space-constrained handheld enclosures.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC16F873AT-E/ML — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC16F873A-I/ML | PIC16F873A-E/ML | PIC16F876AT-E/ML | PIC16F873A-I/SS |
|---|---|---|---|---|---|
| Package | 28-QFN (6x6 mm) | 28-QFN (6x6) - same | 28-QFN (6x6) - same | 28-QFN (6x6) - same | 28-SSOP (not drop-in) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (FLASH) | 7 KB (4K x 14) | 7 KB | 7 KB | 14 KB | 7 KB |
| RAM Size | 192 bytes | 192 bytes | 192 bytes | 368 bytes | 192 bytes |
| EEPROM Size | 128 bytes | 128 bytes | 128 bytes | 256 bytes | 128 bytes |
| Max CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| GPIO Pins | 22 | 22 | 22 | 22 | 22 |
| Temperature Grade | -40C to +125C (E) | -40C to +85C (I) | -40C to +125C (E) | -40C to +125C (E) | -40C to +85C (I) |
| Packaging | Tape & Reel (T) | Tray | Tray | Tape & Reel | Tube |
Principaux différenciateurs
- Extended -40C to +125C temperature grade (vs PIC16F873A-I/ML)
- Tape-and-reel packaging for high-volume SMT (vs PIC16F873A-E/ML (tray))
- Compact 6x6mm QFN footprint (vs PIC16F873A-I/SS (28-SSOP))
Notes de conception
Estimated: the 28-QFN package exposes a thermal pad on its underside that must be soldered to a PCB copper pad for both thermal dissipation and mechanical reliability. Connect this pad to VSS through at least four thermal vias (0.3mm drill, 1mm pitch) to a ground plane on the opposite side. Without proper soldering, the part can overheat at 20MHz full-load operation and exhibit intermittent JTAG/ICSP failures during programming.
Place a 100nF ceramic decoupling capacitor as close as possible to the VDD pin (pin 20) with traces no longer than 2mm. Add a 10uF bulk capacitor near the IC for switching transient suppression. According to Microchip datasheet DS30262D, the part operates from 2.0V to 5.5V Vdd; below 4.5V the ADC accuracy degrades, so use a low-dropout regulator such as MCP1700 for stable analog reference rails.
Do not leave the MCLR pin floating - it must be tied to VDD through a 10kohm pull-up resistor for normal operation. A floating MCLR causes random resets and erratic program execution. For ICSP programming, the MCLR/VPP line is driven to ~13V during bulk erase; ensure your reset circuit uses a clamping diode or current limiter to protect downstream components.
When using the 28-QFN for high-speed SPI (above 5MHz clock), keep the SCK/SDO/SDI traces short and matched in length. Add 33ohm series damping resistors near the MCU pins to reduce ringing on long board traces. The exposed thermal pad doubles as a reference plane - route sensitive analog signals (AN0-AN4) on an opposite layer separated by a continuous ground plane to minimize ADC coupling from digital switching.
Informations de conformité
RoHS and REACH compliant per Microchip product declaration; lead-free matte-tin plating on QFN pads. AEC-Q100 qualification is not applicable to the standard PIC16F873AT-E/ML - automotive customers should request PIC16F873AT-E/MLVAO or contact Microchip for AEC-Q100 grade options.
