PIC16LF1939-E/P - 28KB Flash 8-bit MCU w/ LCD & XLP | Microchip
Référence : PIC16LF1939-E/P ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $4.9 | $4,90 |
| 10 | $4.41 | $44,10 |
| 100 | $3.92 | $392,00 |
| 500 | $3.54 | $1 770,00 |
| 1 000 | $3.14 | $3 140,00 |
PIC16LF1939-E/P Présentation
An 8-bit microcontroller (MCU) is a compact processor core integrated with program memory, RAM, data EEPROM, and programmable peripherals on a single die. The PIC16LF1939 belongs to Microchip's enhanced mid-range PIC16 family, which adds a hardware 16-level stack, 49 instructions, and 200 ns instruction execution. Within the broader hierarchy, it sits at: PIC16 → 8-bit MCU → microcontroller → embedded processor → semiconductor. Its on-chip peripherals include a 36-I/O port set, up to 17 ADC channels (10-bit), multiple timers, EUSART, MSSP (I²C/SPI), and a charge-pump LCD driver — making it a true system-on-chip for human-machine-interface designs.
Key specifications include 1 KB RAM, 256 bytes of data EEPROM, internal 32 kHz to 32 MHz oscillator with PLL, nanoWatt XLP sleep current below 1 µA, an integrated LCD driver capable of up to 248 segments, and an extended operating temperature range of -40 °C to +125 °C. The 'E' temperature grade and 40-pin PDIP through-hole package (suffix /P) simplify prototyping and breadboarding. The 'LF' prefix denotes the low-voltage silicon revision.
Architecturally, the part uses a RISC Harvard-bus design with separate program and data paths, allowing instruction fetch and operand access in a single cycle. The 10-bit ADC with acquisition timer, complementary waveform generator, and configurable logic cell expand its applicability to mixed-signal sensor and motor-control boards. The XLP technology combines deep sleep, RTC, and WDT with selective peripheral clock gating to extend battery life.
Typical applications include thermostats and white-goods HMIs with LCD readout, battery-powered sensor nodes with segment displays, industrial counters and timers, automotive dashboard clusters (extended temperature grade), medical infusion pumps with LCD user interface, and consumer appliances requiring capacitive-touch or segment-LCD indication. Designers value the part for its ability to drive a glass LCD directly, eliminating an external segment driver and reducing BOM cost.
When designing with this device, allocate at least 4.0 V VDD for full 32 MHz operation; drop to lower frequencies for low-voltage battery scenarios. The LCD charge pump requires external capacitors on VLCD pins — do not omit them. Always configure the PPS (Peripheral Pin Select) module before enabling EUSART or MSSP to prevent bus contention during startup.
This page synthesizes distributor pricing, drop-in alternatives drawn from the same PIC16LF193x family, and practical design notes not found in the manufacturer datasheet — giving engineers and procurement teams a single decision-ready reference.
Alternatives de remplacement direct pour PIC16LF1939-E/P — 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 PIC16LF1939-E/P (même facteur de forme et même empreinte) — différant par Core Architecture, Mounting Type, Operating Temperature, Timers, I/O Pins.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC16LF1939-I/P
✅ Remplacement direct✓ En stock
$2.5 / unité
Voir la fiche technique →PIC16F1939-I/PT
✅ Remplacement direct✓ En stock
$3.42 / unité
Voir la fiche technique →PIC16F1939-E/P
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$2.65 / unité
Voir la fiche technique →PIC16LF1938-I/P
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
PIC16LF1939-E/P Valeurs maximales et caractéristiques électriques
| Core Architecture | 8-bit PIC16 enhanced mid-range RISC |
| Program Memory | 28 KB (16K x 14) Flash |
| RAM | 1 KB |
| Data EEPROM | 256 bytes |
| Maximum CPU Speed | 32 MHz (200 ns instruction cycle) |
| Supply Voltage (LF) | 1.8 V to 5.5 V (typical spec 2.3 V to 3.6 V per datasheet) |
| I/O Pins | 36 |
| ADC | 10-bit, up to 17 channels |
| LCD Driver | Integrated, up to 248 segments with charge pump |
| Timers | 5 x 8/16-bit with CCP/ECCP |
| Communication | EUSART, MSSP (I²C/SPI) |
| Température de fonctionnement | -40 °C to +125 °C (E temperature grade) |
| Boîtier | 40-pin PDIP (0.600", 15.24 mm), through-hole |
| Type de montage | Through-Hole (THT) |
| Statut RoHS | Compliant (lead-free) |
| Niveau MSL | 1 (not moisture-sensitive) |
| nanoWatt XLP Sleep Current | < 1 µA typical (data-retention mode) |
Configuration des broches de PIC16LF1939-E/P
| Broche 1 | MCLR/VPP — Master clear reset / programming voltage input |
| Broche 2 | RA0 — Port A bit 0 / analog input |
| Broche 3 | RA1 — Port A bit 1 / analog input |
| Broche 4 | RA2 — Port A bit 2 / analog input |
| Broche 5 | RA3 — Port A bit 3 / analog input |
| Broche 6 | RA4 — Port A bit 4 / analog input |
| Broche 7 | RA5 — Port A bit 5 / analog input |
| Broche 8 | RE3 — Port E bit 3 (input only on 40-pin) |
| Broche 9 | RA7 — Port A bit 7 / oscillator |
| Broche 10 | RA6 — Port A bit 6 / oscillator |
| Broche 11 | VDD — Positive supply voltage |
| Broche 12 | VSS — Ground reference |
| Broche 13 | RA7/OSC1 — Port A bit 7 / oscillator input |
| Broche 14 | RA6/OSC2 — Port A bit 6 / oscillator output |
| Broche 15 | RC0 — Port C bit 0 |
| Broche 16 | RC1 — Port C bit 1 |
| Broche 17 | RC2 — Port C bit 2 |
| Broche 18 | RC3 — Port C bit 3 |
| Broche 19 | RD0 — Port D bit 0 |
| Broche 20 | RD1 — Port D bit 1 |
| Broche 21 | RD2 — Port D bit 2 |
| Broche 22 | RD3 — Port D bit 3 |
| Broche 23 | RC4 — Port C bit 4 |
| Broche 24 | RC5 — Port C bit 5 |
| Broche 25 | RC6 — Port C bit 6 |
| Broche 26 | RC7 — Port C bit 7 |
| Broche 27 | RD4 — Port D bit 4 |
| Broche 28 | RD5 — Port D bit 5 |
| Broche 29 | RD6 — Port D bit 6 |
| Broche 30 | RD7 — Port D bit 7 |
| Broche 31 | VSS — Ground reference |
| Broche 32 | VDD — Positive supply voltage |
| Broche 33 | RB0 — Port B bit 0 / interrupt-on-change |
| Broche 34 | RB1 — Port B bit 1 / interrupt-on-change |
| Broche 35 | RB2 — Port B bit 2 / interrupt-on-change |
| Broche 36 | RB3 — Port B bit 3 / interrupt-on-change |
| Broche 37 | RB4 — Port B bit 4 / interrupt-on-change |
| Broche 38 | RB5 — Port B bit 5 / interrupt-on-change |
| Broche 39 | RB6 — Port B bit 6 / ICSPCLK |
| Broche 40 | RB7 — Port B bit 7 / ICSPDAT |
Applications typiques
PIC16LF1939-E/P convient pour 6 applications: Thermostat / HVAC HMI with Segment LCD, Battery-Powered Sensor Node with LCD Readout, Industrial Counter / Timer Front Panel, Automotive Dashboard Cluster (Non-Safety), Medical Infusion Pump / Handheld Diagnostic, Consumer Appliance Front Panel (Washer, Oven, Coffee).
Thermostat / HVAC HMI with Segment LCD
The PIC16LF1939-E/P's integrated LCD driver supports up to 248 segments with on-chip charge pump, enabling direct glass-LCD connection without an external segment driver. This slashes BOM cost for wall thermostats and HVAC user interfaces that display temperature, mode and setpoint. The 28 KB flash holds a full segmented UI plus 7-day scheduling logic. nanoWatt XLP sleep current below 1 µA lets the unit run 5+ years on two AA cells while continuously refreshing the LCD.
Recommandé
Battery-Powered Sensor Node with LCD Readout
For wireless or wired sensor nodes with on-device LCD indication, the PIC16LF1939-E/P combines 32 MHz CPU, 1.8 V minimum supply, and sub-1 µA sleep current. The 10-bit ADC with up to 17 channels reads temperature, humidity and battery voltage without an external analog front end. The internal 32 kHz oscillator and RTC allow precise time-stamping while in sleep, and the segment LCD remains visible with the CPU off, drawing microamps. Battery life often exceeds 10 years on a CR2032 coin cell.
Recommandé
Industrial Counter / Timer Front Panel
Factories deploying part counters, batch timers and shift-totalizers benefit from the PIC16LF1939-E/P's 36 I/O pins for direct keypad and 7-segment/glass-LCD interfacing. The 16-bit CCP/ECCP modules drive relays and SSR triggers with microsecond resolution, while the MSSP peripheral interfaces to I²C RTCs and EEPROMs for non-volatile log retention. The E temperature grade (-40 °C to +125 °C) supports unheated factory cabinets and outdoor panels without thermal derating.
Recommandé
Automotive Dashboard Cluster (Non-Safety)
While not AEC-Q100 qualified, the PIC16LF1939-E/P's extended -40 °C to +125 °C temperature range covers many non-safety automotive applications such as HVAC controls, seat-position memory switches, infotainment keypads and door-module displays. Its charge-pump LCD driver eliminates a negative bias supply for TN-glass segments, and the EUSART/MSSP allow CAN-transceiver bridging or LIN slave emulation when paired with external bus ICs.
Recommandé
Medical Infusion Pump / Handheld Diagnostic
In portable medical devices such as insulin pen meters, infusion pumps and handheld pulse-oximeter displays, the PIC16LF1939-E/P drives segment LCD readouts of dose, time and alarm state from a single coin cell. The 1.8 V to 5.5 V supply rails accept NiMH or Li-ion primaries directly without an LDO. nanoWatt XLP keeps quiescent current below 1 µA between treatments, and the 32 MHz CPU runs pump-control loops at sub-millisecond update rates.
Recommandé
Consumer Appliance Front Panel (Washer, Oven, Coffee)
White-goods front panels with multi-segment LCDs and capacitive-touch keypads are a primary use case for the PIC16LF1939-E/P. The integrated charge-pump LCD driver connects directly to TN-glass displays without an external bias generator, while the MSSP peripheral links to the main appliance control board over I²C for status synchronization. The 28 KB flash supports multilingual UI strings, icon bitmaps, and complex state machines for cook profiles and wash cycles.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC16LF1939-E/P — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC16LF1939-I/P | PIC16F1939-I/P | PIC16F1939-E/P | PIC16LF1938-I/P |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 40-pin PDIP | 40-pin PDIP (same) | 40-pin PDIP (same) | 40-pin PDIP (same) | 40-pin PDIP (same) |
| Flash Memory | 28 KB | 28 KB | 28 KB | 28 KB | 28 KB |
| RAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| Supply Voltage | 1.8 V to 5.5 V (LF silicon) | 1.8 V to 5.5 V (LF silicon) | 1.8 V to 5.5 V (F silicon) | 1.8 V to 5.5 V (F silicon) | 1.8 V to 5.5 V (LF silicon) |
| Temperature Grade | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) | -40C to +125C (E) | -40C to +85C (I) |
| I/O Pins | 36 | 36 | 36 | 36 | 36 |
Principaux différenciateurs
- Extended -40C to +125C temperature grade with LF silicon (vs PIC16LF1939-I/P)
- Low-voltage LF silicon runs down to 1.8 V (vs PIC16F1939-I/P (F silicon))
- Mature, widely-stocked 40-pin PDIP with full LCD charge pump (vs PIC16LF1938-I/P (28-pin variant))
Notes de conception
For full 32 MHz operation, VDD must be at least 2.3 V (or 3.6 V per typical datasheet headline). At lower voltages, switch to the internal 16 MHz HFINTOSC or an external 32.768 kHz crystal to maintain reliable clocking. Always add a 100 nF decoupling capacitor close to each VDD/VSS pin pair (the 40-pin PDIP has two VDD pins at 11 and 32, two VSS pins at 12 and 31) to suppress switching transients.
The integrated LCD charge pump requires external flying capacitors on the VLCD pins — typically 1 µF X7R ceramic on VLCD1/VLCD2/VLCD3. Without these caps the LCD driver will not generate the bias voltages required for segment contrast. Place the LCD segment-trace routing away from high-frequency digital signals (PWM, EUSART) and add a ground guard ring around the COM lines to reduce flicker.
Do not omit the MCLR pull-up resistor (typically 10 kΩ to VDD) — leaving MCLR floating causes spurious resets in noisy environments. Configure the Configuration Words (CONFIG1, CONFIG2, CONFIG3) to disable code protection only after confirming the firmware boots correctly, and always program the brown-out reset (BOR) voltage to match your supply rail. The ICSP pins RB6/PGD and RB7/PGC must be reachable in-circuit for production programming.
Informations de conformité
RoHS compliant per Microchip product page. Not AEC-Q100 qualified — automotive safety applications should use the AEC-Q100-qualified PIC16F1939-E/P variant or a dedicated automotive MCU. Halogen-free per Microchip packaging specifications.
