PIC12F1840-I/SN - 8-bit XLP MCU 32MHz 7KB Flash SOIC-8 | Microchip
Référence : PIC12F1840-I/SN ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $1.85 | $1,85 |
| 10 | $1.65 | $16,50 |
| 100 | $1.42 | $142,00 |
| 500 | $1.18 | $590,00 |
| 1 000 | $0.99 | $990,00 |
| 3 000 | $0.82 | $2 460,00 |
PIC12F1840-I/SN Présentation
A microcontroller (MCU) is a single-chip computer containing a CPU core, program and data memory, programmable I/O peripherals, and communication interfaces. The PIC12F1840 uses an Enhanced Mid-Range 8-bit core with 49 instructions and a 16-level hardware stack, sitting in the taxonomy chain microcontroller -> embedded controller -> semiconductor IC. It is designed for low-pin-count, battery-powered, and always-on applications.
Key features include an internal 32 MHz oscillator, four 10-bit ADC channels, a configurable mTouch capacitive sensing module, a Data Signal Modulator (DSM), an EUSART with auto-baud, an MI2C/SPI interface, a 25 mA source/sink I/O, and a comparator with selectable voltage reference. The integrated ECCP (Enhanced Capture/Compare/PWM) module supports half-bridge, full-bridge, and PWM steering topologies for lighting and motor control.
The 8-pin SOIC (SN) package makes the PIC12F1840-I/SN an ideal drop-in upgrade for legacy PIC12F675 designs that need more memory, more peripherals, and lower sleep current. PIC XLP nanoWatt technology combined with active clock tuning and ultra-low-power wake-up sources enables multi-year coin-cell operation in remote sensor nodes.
Typical applications include consumer appliances, IoT end nodes, LED lighting controllers, capacitive touch user interfaces, sensor conditioning, and remote controls. The wide operating range (industrial -40 °C to +85 °C) and rich peripheral set make it a strong fit for space-constrained mixed-signal designs.
When designing with the PIC12F1840, ensure decoupling capacitors of 0.1 µF are placed within 5 mm of VDD, and that unused I/O are configured as outputs to minimize sleep current. Programming is supported by the free MPLAB X IDE and Xpress, PICkit, or Curiosity programmers - a key advantage over cross-brand 8-bit alternatives that often lack a unified, free toolchain.
This page synthesizes drop-in alternatives, package-matched cross-references, and practical design notes that complement, but do not replace, the manufacturer datasheet.
Alternatives de remplacement direct pour PIC12F1840-I/SN — 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 PIC12F1840-I/SN (même facteur de forme et même empreinte) — différant par ADC, Internal Oscillator, Package, I/O Pins, Maximum CPU Speed.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC12F1840T-I/SN
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
PIC12F1840-E/SN
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$1.18 / unité
Voir la fiche technique →PIC12F1822-I/SN
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$0.85 / unité
Voir la fiche technique →PIC12F1572-I/SN
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$0.75 / unité
Voir la fiche technique →PIC12F1571-I/SN
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$0.6549 / unité
Voir la fiche technique →PIC12F1840-I/SN Valeurs maximales et caractéristiques électriques
| Core Architecture | Enhanced Mid-Range 8-bit PIC (49 instructions) |
| Maximum CPU Speed | 32 MHz (internal oscillator) |
| Program Memory (Flash) | 7 KB (4K x 14 words) |
| Data EEPROM | 256 bytes |
| SRAM | 256 bytes |
| Hardware Stack | 16 levels |
| Supply Voltage (VDD) | 2.5 V to 5.5 V |
| I/O Pins | 6 (with 25 mA source/sink) |
| ADC | 4 channels, 10-bit |
| Plage de température de fonctionnement | -40 °C to +85 °C (Industrial) |
| Boîtier | 8-pin SOIC (SN) |
| Type de montage | Surface Mount |
| Communication Interfaces | MI2C, SPI, EUSART with auto-baud |
| Special Peripherals | ECCP PWM, mTouch, DSM, Comparator with VREF |
| Low-Power Technology | nanoWatt XLP |
| Statut RoHS | Compliant |
| Niveau MSL | 1 (unlimited floor life) |
Configuration des broches de PIC12F1840-I/SN
| Broche 1 | VDD — Positive supply voltage (2.5 V to 5.5 V) |
| Broche 2 | RA5 — I/O pin / T1CKI / CCP1 / AN4 |
| Broche 3 | RA4 — I/O pin / AN3 / T1G / SDO / mTouch |
| Broche 4 | RA3 — I/O pin / MCLR / VPP (programming voltage input) |
| Broche 5 | RA2 — I/O pin / AN2 / T0CKI / INT / mTouch |
| Broche 6 | RA1 — I/O pin / AN1 / ICSPCLK / mTouch |
| Broche 7 | RA0 — I/O pin / AN0 / ICSPDAT / DACREF / mTouch |
| Broche 8 | VSS — Ground reference |
Applications typiques
PIC12F1840-I/SN convient pour 6 applications: IoT Sensor End Node, Capacitive Touch User Interface, LED Lighting Controller, Consumer Appliance Control, Remote Control Transmitter, Battery Management Companion MCU.
IoT Sensor End Node
The PIC12F1840-I/SN suits ultra-low-power IoT sensor nodes powered by a single CR2032 coin cell. Its 20 nA typical deep-sleep current from nanoWatt XLP technology, 4-channel 10-bit ADC, and integrated EUSART with auto-baud enable multi-year battery operation while still supporting periodic sensor reads over a UART-linked radio module. The 8-pin SOIC footprint keeps the BOM minimal for compact wireless sensor PCBs.
Recommandé
Capacitive Touch User Interface
The PIC12F1840-I/SN's integrated mTouch capacitive sensing module supports up to 8 buttons or a slider using its 6 available I/O pins, enabling BOM-free touch interfaces. Combined with the Data Signal Modulator (DSM) and a hardware timer, it provides a robust front panel for appliances and consumer products, with the 32 MHz core delivering quick response times. The 7 KB Flash comfortably accommodates Microchip's mTouch library plus application code.
Recommandé
LED Lighting Controller
For LED lighting drivers, the PIC12F1840-I/SN's ECCP module provides half-bridge, full-bridge, and PWM-steering topologies that drive MOSFETs or constant-current regulators directly. The 25 mA source/sink I/O eliminates external drivers for low-current LED strings, while the 32 MHz core supports smooth PWM dimming and color-mixing algorithms. The wide 2.5-5.5 V supply accepts single-cell Li-ion or regulated 5 V rails without additional regulation.
Recommandé
Consumer Appliance Control
The PIC12F1840-I/SN fits small kitchen and personal-care appliances that need a compact MCU for state-machine control, sensor readout, and user feedback. The hardware comparator with selectable voltage reference handles zero-crossing detection and over-current protection without external components, while the EUSART/SPI/I2C interfaces link to HMI displays or external EEPROM. Its -40 to +85 °C industrial range tolerates typical appliance thermal environments.
Recommandé
Remote Control Transmitter
The PIC12F1840-I/SN is well suited to IR/RF remote control transmitters, where low average power, compact size, and reliable wakeup are key. Its nanoWatt XLP deep sleep draws around 20 nA, allowing a CR2032 to last the shelf life of the product, while the mTouch sensing module enables capacitive buttons without mechanical wear. The 32 MHz internal oscillator avoids external crystals, keeping the BOM to a few passive components.
Recommandé
Battery Management Companion MCU
The PIC12F1840-I/SN acts as a secondary MCU in battery packs, providing cell balancing control, fuel-gauge assistance, and fault logging through its ADC, comparator, and EUSART. Its low quiescent current minimizes pack self-discharge, while the 7 KB Flash supports sophisticated state-of-charge algorithms alongside safety monitoring. The 8-pin SOIC package fits inside small 18650 and 21700 battery protection boards.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC12F1840-I/SN — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC12F1840T-I/SN | PIC12F1840-E/SN | PIC12F1822-I/SN | PIC12F1572-I/SN | PIC12F1571-I/SN |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 8-pin SOIC (SN) | 8-pin SOIC (SN) - same | 8-pin SOIC (SN) - same | 8-pin SOIC (SN) - same | 8-pin SOIC (SN) - same | 8-pin SOIC (SN) - same |
| Flash Memory | 7 KB (4K x 14) | 7 KB - same | 7 KB - same | 3.5 KB (-50%) | 3.5 KB (-50%) | 3.5 KB (-50%) |
| SRAM | 256 bytes | 256 bytes - same | 256 bytes - same | 128 bytes (-50%) | 256 bytes - same | 256 bytes - same |
| Maximum Clock | 32 MHz | 32 MHz - same | 32 MHz - same | 32 MHz - same | 32 MHz - same | 32 MHz - same |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C - same | -40 C to +125 C (extended) | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same |
| ADC Channels / Resolution | 4 x 10-bit | 4 x 10-bit - same | 4 x 10-bit - same | 4 x 10-bit - same | 4 x 10-bit - same | 4 x 10-bit - same |
| Special Peripherals | ECCP, mTouch, DSM, Comparator+VREF | Same - identical die | Same - identical die | ECCP, mTouch, DSM, Comparator | 16-bit PWM, 10-bit DAC, no DSM | 16-bit PWM, no DSM, no DAC |
Principaux différenciateurs
- Highest Flash density in the PIC12F SOIC-8 family (vs PIC12F1822-I/SN)
- Full mTouch + DSM peripheral set in a single SOIC-8 device (vs PIC12F1571-I/SN)
- Lower deep-sleep current than legacy PIC12F675 designs (vs PIC12F675)
Notes de conception
Place a 0.1 µF decoupling capacitor within 5 mm of the VDD pin (pin 1), and add a 10 µF bulk capacitor at the supply entry. For battery-powered designs, configure the device to enter deep sleep between transactions; the typical deep-sleep current is 20 nA with WDT disabled, allowing multi-year operation from a CR2032 coin cell. Use the LFINTOSC during sleep and switch to HFINTOSC+PLL only for active transactions.
Keep traces to RA3/MCLR short and avoid routing noisy signals near the programming pin. The 8-pin SOIC (SN) package has a thermal resistance of approximately 100 °C/W; for designs that dissipate more than 50 mA, route a copper pour under the exposed leads of the SOIC pads. Use a continuous ground plane on the bottom layer to reduce EMI from the internal 32 MHz oscillator.
Do not leave unused I/O pins floating; configure them as outputs driving low to avoid shoot-through current. Ensure RA3/MCLR is pulled high through a 10 kΩ resistor if not used in ICSP programming mode. When migrating from PIC12F675, note that the RA3 pin function has changed and that ICD debugging now uses dedicated ICSP pins (RA0/RA1) instead of the legacy two-pin layout.
For mTouch capacitive sensing, route the sensor electrode traces with a ground guard ring and avoid crossing them with high-speed digital signals. The Data Signal Modulator (DSM) can mix inputs from comparators, ADCs, and PWM modules for advanced signal conditioning; enable its slew-rate limiting when driving long PCB traces to reduce ringing. Allow a 2 µs settling time after clock switch before reading ADC samples.
Informations de conformité
RoHS compliant and lead-free per Microchip product page. The -I/SN industrial grade variant is not AEC-Q100 qualified; for automotive applications consider the PIC16F1xxx AEC-Q100 family instead.
