PIC17C44-25/PQ - 8-Bit 25MHz OTP MCU 16KB | Microchip
Référence : PIC17C44-25/PQ ⚠ Dernier achat| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $15.15 | $15,15 |
| 10 | $13.5 | $135,00 |
| 100 | $11.2 | $1 120,00 |
| 500 | $9.5 | $4 750,00 |
| 1 000 | $7.55 | $7 550,00 |
PIC17C44-25/PQ Présentation
An 8-bit microcontroller (MCU) is a single-chip computer integrating a CPU, RAM, program memory, peripherals, and I/O on one die, designed to execute embedded control tasks in deterministic cycles. PIC17C parts belong to Microchip's mid-range PIC family, positioned between the PIC16C baseline and PIC18 enhanced cores, with the PIC17C being one of the earliest families to introduce a 16-bit program word and a 16-bit instruction set while retaining an 8-bit data path. Modern replacements like PIC18F442 share the 40/44-pin footprint but migrate to Flash memory.
Key specifications include a maximum clock of 25 MHz delivering 121 ns instruction execution, an internal multiplier, multiple timer/counter modules, a USART, and a 12-bit instruction word addressed across 16 KB of OTP. The device supports up to 33 I/O pins and operates from a single 5 V supply. Compared with PIC16C5X predecessors, the PIC17C44 adds a hardware multiplier, expanded interrupt controller, and a 16-level hardware stack, while preserving source-level compatibility for code migrated from PIC16C and PIC12C families.
Architecturally, the PIC17C44 uses a Harvard bus with separate program and data paths, enabling single-cycle instruction fetch plus one or two data cycles. The OTP memory is factory- or user-programmed once, providing low per-unit cost in mature production runs but limiting field upgrades. A 25 MHz oscillator and PLL option define the maximum instruction rate; the '25' speed suffix confirms 25 MHz operation versus the 16 MHz '-16' grade.
Typical applications include industrial motor control, embedded instrumentation, sensor interfaces, automotive body controllers (legacy), and consumer appliance controllers where deterministic 8-bit control is sufficient. The 44-MQFP footprint also makes it compatible with a broad set of legacy PIC17C/CR sockets when migrating to flash-based PIC18F442 in redesigns. When designing with this part, validate OTP programming flow before committing to a production run - unlike Flash, OTP cannot be reprogrammed and every unit must be discarded for firmware errors.
Alternatives de remplacement direct pour PIC17C44-25/PQ — 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 PIC17C44-25/PQ (même facteur de forme et même empreinte) — différant par Package, Operating Temperature, Maximum Clock Frequency, Program Memory Size, Program Memory Type.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC17C44-25I/PQ
✅ Remplacement direct✓ En stock
$9.85 / unité
Voir la fiche technique →PIC17C44T-25I/PQ
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$8.45 / unité
Voir la fiche technique →PIC17C44T-25/PQ
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$9.75 / unité
Voir la fiche technique →PIC17C44-16I/PQ
✅ Remplacement direct✓ En stock
$15.5 / unité
Voir la fiche technique →PIC17C43-25/PQ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC17C44-25/PQ Valeurs maximales et caractéristiques électriques
| Core Architecture | PIC 8-bit RISC |
| Program Memory Type | OTP (One-Time-Programmable) |
| Program Memory Size | 16 KB (8K x 16) |
| RAM Size | 454 bytes |
| Fréquence d'horloge maximale | 25 MHz |
| Instruction Execution Time | 121 ns (8.25 MIPS) |
| Largeur du bus de données | 8-bit |
| Number of I/O Pins | 33 |
| Boîtier | 44-MQFP (10x10 mm) |
| Type de montage | Surface Mount |
| Instruction Set Size | 58 single-word instructions |
Configuration des broches de PIC17C44-25/PQ
| Broche 1 | MCLR — Master Clear (Reset) input |
| Broche 2 | RA0/AN0 — Port A bit 0 / analog input 0 |
| Broche 3 | RA1/AN1 — Port A bit 1 / analog input 1 |
| Broche 4 | RA2/AN2 — Port A bit 2 / analog input 2 |
| Broche 5 | RA3/AN3 — Port A bit 3 / analog input 3 |
| Broche 6 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| Broche 7 | RA5/SS — Port A bit 5 / SPI slave select |
| Broche 8 | OSC1 — Crystal oscillator input |
| Broche 9 | OSC2 — Crystal oscillator output |
| Broche 10 | RC0 — Port C bit 0 |
| Broche 11 | RC1 — Port C bit 1 |
| Broche 12 | RC2 — Port C bit 2 |
| Broche 13 | RC3 — Port C bit 3 |
| Broche 14 | RC4 — Port C bit 4 |
| Broche 15 | RC5 — Port C bit 5 |
| Broche 16 | RC6 — Port C bit 6 |
| Broche 17 | RC7 — Port C bit 7 |
| Broche 18 | VSS — Ground |
| Broche 19 | VDD — Positive supply (+5V) |
| Broche 20 | VSS — Ground |
| Broche 21 | RB0/INT — Port B bit 0 / external interrupt |
| Broche 22 | RB1 — Port B bit 1 |
| Broche 23 | RB2 — Port B bit 2 |
| Broche 24 | RB3 — Port B bit 3 |
| Broche 25 | RB4 — Port B bit 4 |
| Broche 26 | RB5 — Port B bit 5 |
| Broche 27 | RB6 — Port B bit 6 |
| Broche 28 | RB7 — Port B bit 7 |
| Broche 29 | RD0 — Port D bit 0 |
| Broche 30 | RD1 — Port D bit 1 |
| Broche 31 | RD2 — Port D bit 2 |
| Broche 32 | RD3 — Port D bit 3 |
| Broche 33 | RD4 — Port D bit 4 |
| Broche 34 | RD5 — Port D bit 5 |
| Broche 35 | RD6 — Port D bit 6 |
| Broche 36 | RD7 — Port D bit 7 |
| Broche 37 | RE0 — Port E bit 0 (PIC17C44 44-pin only) |
| Broche 38 | RE1 — Port E bit 1 (PIC17C44 44-pin only) |
| Broche 39 | RE2 — Port E bit 2 (PIC17C44 44-pin only) |
| Broche 40 | NC — Not connected (per datasheet) |
| Broche 41 | NC — Not connected (per datasheet) |
| Broche 42 | NC — Not connected (per datasheet) |
| Broche 43 | NC — Not connected (per datasheet) |
| Broche 44 | NC — Not connected (per datasheet) |
Applications typiques
PIC17C44-25/PQ convient pour 6 applications: Industrial Motor Control, Embedded Sensor Instrumentation, Automotive Body Controllers (Legacy), Consumer Appliance Controllers, Point-of-Sale Terminals and Printers, Industrial Control Panels and HMI.
Industrial Motor Control
The PIC17C44-25/PQ's 25 MHz clock (8.25 MIPS) and hardware multiplier make it well suited to single-axis BLDC or stepper motor control loops where deterministic 121 ns instruction execution and a 16-bit program word simplify PID math. Its 33 I/O pins connect directly to gate drivers, Hall sensors, and quadrature encoders without external logic. The 44-MQFP footprint supports surface-mount production lines for industrial drives. Trade-off: OTP memory prevents firmware updates, so the PID gains and commutation tables must be validated before programming. Pair with IR2110 gate drivers and ACS712 current sensors for a complete 3-phase inverter reference design.
Recommandé
Embedded Sensor Instrumentation
The PIC17C44-25/PQ's 454-byte RAM and 33 I/O let it aggregate multiple analog/digital sensors (temperature, pressure, flow) and drive an LCD or UART output. The Harvard bus and 121 ns cycle time keep ADC read latency predictable for time-stamped data logging. The 44-MQFP exposes enough pins to run an external 12-bit ADC like MCP3201 in parallel with a serial EEPROM for data storage. Trade-off: 454-byte RAM caps log depth, so use circular buffering to external SPI flash. For battery-powered instruments, however, PIC17C is not ideal - consider PIC18LF or PIC24F for low-power sleep modes.
Recommandé
Automotive Body Controllers (Legacy)
The PIC17C44-25/PQ's 33 I/O and 5 V operation historically drove automotive body modules (window lifters, mirror controllers, simple HVAC flaps) in late-1990s/early-2000s designs. The 25 MHz throughput handles LIN-bus-style UART traffic and debounced switch matrices. However, this is NOT an AEC-Q100 qualified part - modern automotive designs should use PIC18F46K22 or dsPIC33 families with full automotive qualification. Use the PIC17C44-25/PQ only for maintaining legacy production, not for new automotive programs.
Recommandé
Consumer Appliance Controllers
The PIC17C44-25/PQ's 16 KB OTP and 33 I/O drive washing-machine, dishwasher, and microwave user-interface boards where per-unit cost matters more than field upgradeability. The 5 V rail and 25 MHz clock comfortably handle keypad scanning, 7-segment or character-LCD multiplexing, and triac-fired heater/valve control via zero-cross interrupts. With OTP pricing around $7-15/unit at volume, BOM cost stays low for high-volume appliances. Trade-off: every firmware bug requires a tooling change, so pre-production validation must be exhaustive.
Recommandé
Point-of-Sale Terminals and Printers
The PIC17C44-25/PQ's USART and 16 KB OTP handle legacy POS terminal and receipt-printer logic, including keypad scan, LCD update, and serial communication to a host or fiscal printer. The 25 MHz throughput keeps print-head stepper and paper-feed motor control in real time. Many legacy POS designs used PIC17C44 because its 8-bit Harvard architecture gave deterministic print timing without RTOS overhead. Modern replacements (PIC18F452, PIC24FJ) add Flash and USB, but PIC17C44-25/PQ remains serviceable for spare-part channels. Trade-off: no USB peripheral, so external UART-to-USB bridges are required for PC connectivity.
Recommandé
Industrial Control Panels and HMI
The PIC17C44-25/PQ's 33 I/O and 25 MHz clock drive small industrial HMI panels with pushbuttons, LED indicators, and 4x4 or 4x5 keypads, plus character-LCD or low-resolution graphic displays. The hardware multiplier accelerates button-debounce filters and rotary-encoder quadrature decoding. The 44-MQFP allows the panel PCB to integrate RS-232/RS-485 transceivers directly. Trade-off: with only 454 bytes RAM, complex multi-screen menu stacks must use compact state machines. For new designs, PIC18F4520 or PIC18F46K22 in the same footprint offer Flash reprogramming and modern peripherals.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC17C44-25/PQ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC17C44-25I/PQ | PIC17C44T-25I/PQ | PIC17C44T-25/PQ | PIC17C44-16I/PQ | PIC17C43-25/PQ |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-MQFP (10x10 mm) | 44-MQFP (10x10 mm) - same | 44-MQFP (10x10 mm) - same | 44-MQFP (10x10 mm) - same | 44-MQFP (10x10 mm) - same | 44-MQFP (10x10 mm) - same |
| Maximum Clock Frequency | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 16 MHz | 25 MHz |
| Temperature Grade | Commercial (0C to +70C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Commercial | Industrial (-40C to +85C) | Commercial |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| Packaging Form | Tray | Tray | Tape and Reel | Tape and Reel | Tray | Tray |
Principaux différenciateurs
- 25 MHz speed grade delivers 8.25 MIPS, 56% more throughput than 16 MHz variants (vs PIC17C44-16/PQ)
- True drop-in temperature upgrade path to industrial range (vs PIC17C44-25I/PQ)
- 44-MQFP surface-mount package for high-volume SMT production (vs PIC17C44-25/P (40-PDIP))
Notes de conception
OTP memory cannot be reprogrammed. Per Microchip datasheet 30412c, every firmware revision after mask release requires a new part number. Pre-production validation must be exhaustive - use a PIC17C44 Flash equivalent (e.g. PIC18F452 in compatible footprint) for firmware development and finalize code before committing to PIC17C44-25/PQ production. Build a parallel test fixture so failed units can be re-analyzed in circuit.
PIC17C44 operates from a single +5V supply (typical VDD 4.5-5.5V). Decouple VDD with 100 nF ceramic + 10 uF tantalum placed within 25 mm of the supply pins. Brown-out detection is implemented via the BOR fuse setting in the configuration word - enable it for industrial applications to avoid indeterminate operation below 4.0 V. Estimated: at 25 MHz the core draws ~15-25 mA, peaking on external memory accesses.
Keep the 25 MHz crystal traces short and surrounded by a ground guard ring. Place MCLR pull-up (typically 10 kohm to VDD) close to the pin. For the 44-MQFP, the inner paddle is typically not connected on PIC17C44 (verify against datasheet mechanical section); route ground and VDD on inner copper pours with via stitching every 5 mm to control impedance and EMI.
MCLR must rise cleanly with a monotonic edge faster than 1 us; long RC time constants can trigger false resets on noisy industrial lines. Add a 100 nF ceramic across the MCLR pull-up to filter high-frequency noise. For USART-driven designs at 25 MHz, the 0.8% instruction-cycle jitter at 115200 baud is acceptable; verify baud-rate error budget against the electrical characteristics table for higher speeds.
Informations de conformité
Compliance data not explicitly stated in the verified web sources. As a mature OTP part from the late 1990s/early 2000s, this device may predate widespread RoHS/REACH documentation. Confirm with Microchip directly for new designs requiring compliance certification.
