PIC17C44-25/PQ - 8-Bit 25MHz OTP MCU 16KB | Microchip
MPN: PIC17C44-25/PQ ⚠ Waktu Beli TerakhirPIC17C44-25/PQ Ringkasan
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.
Alternatif penggantian untuk PIC17C44-25/PQ — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian PIC17C44-25/PQ (sama faktor bentuk dan footprint) — berbeda di dalam Package, Operating Temperature, Maximum Clock Frequency, Program Memory Size, Program Memory Type.
PIC17C44-25I/PQ
✅ Drop-InKontak untuk harga
Lihat Datasheet →PIC17C44T-25I/PQ
✅ Drop-In ⚠️ Spesifikasi Tidak DisahkanKontak untuk harga
Lihat Datasheet →PIC17C44T-25/PQ
✅ Drop-In ⚠️ Spesifikasi Tidak DisahkanKontak untuk harga
Lihat Datasheet →PIC17C44-16I/PQ
✅ Drop-InKontak untuk harga
Lihat Datasheet →PIC17C43-25/PQ
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
PIC17C44-25/PQ Rating Maksimal & Karakteristik Listrik
| 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 |
| Frekuensi Bawah Maximum | 25 MHz |
| Instruction Execution Time | 121 ns (8.25 MIPS) |
| Lebar Bus Data | 8-bit |
| Number of I/O Pins | 33 |
| Paket | 44-MQFP (10x10 mm) |
| Tipe Mounting | Surface Mount |
| Instruction Set Size | 58 single-word instructions |
Konfigurasi Pin PIC17C44-25/PQ
| Pin produk 1 | MCLR — Master Clear (Reset) input |
| Pin produk 2 | RA0/AN0 — Port A bit 0 / analog input 0 |
| Pin produk 3 | RA1/AN1 — Port A bit 1 / analog input 1 |
| Pin produk 4 | RA2/AN2 — Port A bit 2 / analog input 2 |
| Pin produk 5 | RA3/AN3 — Port A bit 3 / analog input 3 |
| Pin produk 6 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| Pin produk 7 | RA5/SS — Port A bit 5 / SPI slave select |
| Pin produk 8 | OSC1 — Crystal oscillator input |
| Pin produk 9 | OSC2 — Crystal oscillator output |
| Pin produk 10 | RC0 — Port C bit 0 |
| Pin produk 11 | RC1 — Port C bit 1 |
| Pin produk 12 | RC2 — Port C bit 2 |
| Pin produk 13 | RC3 — Port C bit 3 |
| Pin produk 14 | RC4 — Port C bit 4 |
| Pin produk 15 | RC5 — Port C bit 5 |
| Pin produk 16 | RC6 — Port C bit 6 |
| Pin produk 17 | RC7 — Port C bit 7 |
| Pin produk 18 | VSS — Ground |
| Pin produk 19 | VDD — Positive supply (+5V) |
| Pin produk 20 | VSS — Ground |
| Pin produk 21 | RB0/INT — Port B bit 0 / external interrupt |
| Pin produk 22 | RB1 — Port B bit 1 |
| Pin produk 23 | RB2 — Port B bit 2 |
| Pin produk 24 | RB3 — Port B bit 3 |
| Pin produk 25 | RB4 — Port B bit 4 |
| Pin produk 26 | RB5 — Port B bit 5 |
| Pin produk 27 | RB6 — Port B bit 6 |
| Pin produk 28 | RB7 — Port B bit 7 |
| Pin produk 29 | RD0 — Port D bit 0 |
| Pin produk 30 | RD1 — Port D bit 1 |
| Pin produk 31 | RD2 — Port D bit 2 |
| Pin produk 32 | RD3 — Port D bit 3 |
| Pin produk 33 | RD4 — Port D bit 4 |
| Pin produk 34 | RD5 — Port D bit 5 |
| Pin produk 35 | RD6 — Port D bit 6 |
| Pin produk 36 | RD7 — Port D bit 7 |
| Pin produk 37 | RE0 — Port E bit 0 (PIC17C44 44-pin only) |
| Pin produk 38 | RE1 — Port E bit 1 (PIC17C44 44-pin only) |
| Pin produk 39 | RE2 — Port E bit 2 (PIC17C44 44-pin only) |
| Pin produk 40 | NC — Not connected (per datasheet) |
| Pin produk 41 | NC — Not connected (per datasheet) |
| Pin produk 42 | NC — Not connected (per datasheet) |
| Pin produk 43 | NC — Not connected (per datasheet) |
| Pin produk 44 | NC — Not connected (per datasheet) |
Aplikasi Umum
PIC17C44-25/PQ cocok untuk 6 aplikasis: 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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk PIC17C44-25/PQ — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | 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 |
Diferensiator Kunci
- 25 MHz speed grade delivers 8.25 MIPS, 56% more throughput than 16 MHz variants (vsPIC17C44-16/PQ)
- True drop-in temperature upgrade path to industrial range (vsPIC17C44-25I/PQ)
- 44-MQFP surface-mount package for high-volume SMT production (vsPIC17C44-25/P (40-PDIP))
Catatan Desain
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.
Informasi Konformitas
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.
