PIC17C44-33E/PQ - 33MHz 8-bit OTP MCU, 16KB, 44-QFP | Microchip
Référence : PIC17C44-33E/PQ ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $18.5 | $18,50 |
| 10 | $16.2 | $162,00 |
| 100 | $14.05 | $1 405,00 |
| 500 | $12.4 | $6 200,00 |
| 1 000 | $10.85 | $10 850,00 |
PIC17C44-33E/PQ Présentation
A microcontroller (MCU) is a single-chip computer containing a CPU, memory, and programmable I/O peripherals, designed to execute embedded control firmware in real time. The PIC17C44 belongs to the hierarchical taxonomy: PIC17C44 -> PIC17C family -> PIC16/PIC17 architecture -> 8-bit microcontroller -> MCU -> embedded controller -> semiconductor IC. The PIC17C family was Microchip's first high-end 8-bit architecture, offering 58 single-word instructions and an extended 16-bit instruction word that doubles code density compared with the baseline PIC16C core.
Key features include 8.25 MIPS throughput at 33 MHz, an 8-level deep hardware stack, multi-source interrupt controller, and three 16-bit timer/counters with selectable prescalers. The 'E' suffix denotes the Enhanced (-40 °C to +125 °C) industrial operating temperature range, and the OTP memory allows single-pass programming for prototyping and low-volume production. The device is supported by the original MPLAB IDE and PICMASTER universal programmer ecosystem.
From an architectural perspective, the PIC17C44 uses a 16-bit modified Harvard structure with separate program and data buses, an 8-bit ALU, and a hardware multiplier option in the higher-pin PIC17C756 variant. The 33 MHz instruction rate supports control loops in motor drives, instrumentation, and industrial automation where deterministic cycle timing matters more than raw throughput.
Typical applications include industrial control boards, automotive body and chassis ECUs, consumer appliances, security alarm panels, and embedded data acquisition front-ends. The wide operating voltage and 33 I/O count make it suitable for keypad scanning, LED/LCD multiplexing, and UART/SPI peripheral expansion. The newer PIC18F442 is recommended by Microchip as a flash-based successor for new designs, but PIC17C44 remains in service for installed-base maintenance.
When designing with this device, plan a stable 33 MHz crystal or clock source with appropriate load capacitors, and reserve one I/O line for in-system reset/MCLR to enable reliable in-circuit programming of the OTP memory. The OTP memory cannot be erased, so firmware must be verified before final programming; budget one device per prototype iteration. The 44-pin MQFP package requires a 0.8 mm lead pitch footprint with adequate clearance for solder paste stencil apertures.
This page consolidates distributor pricing tiers, drop-in PIC17C44 family alternatives, and practical design notes drawn from the manufacturer datasheet and Microchip forum threads, going beyond the bare spec table found on catalog sites.
Alternatives de remplacement direct pour PIC17C44-33E/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 PIC17C44-33E/PQ (même facteur de forme et même empreinte) — différant par Program Memory Size, Package, RAM Size, Operating Temperature Range, Program Memory Type.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC17C44-25E/PQ
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$4.95 / unité
Voir la fiche technique →PIC17C44-16I/PQ
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$15.5 / unité
Voir la fiche technique →PIC17C44-25I/PQ
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$9.85 / unité
Voir la fiche technique →PIC17C43-25E/PT
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$10.85 / unité
Voir la fiche technique →PIC17C43T-25E/PT
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$10.65 / unité
Voir la fiche technique →PIC17C44-33E/PQ Valeurs maximales et caractéristiques électriques
| Product Type | 8-bit Microcontroller (MCU) |
| Family | PIC17C |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 16 KB (8K x 16 words) |
| RAM Size | 454 bytes |
| CPU Speed | 33 MHz |
| Instruction Execution | 8.25 MIPS (121 ns per instruction) |
| Instruction Set | 58 single-word instructions |
| I/O Pins | 33 |
| Timers | Three 16-bit timer/counters |
| Plage de température de fonctionnement | -40 °C to +125 °C (E suffix = Enhanced) |
| Boîtier | 44-pin MQFP (PQ) |
| Type de montage | Surface Mount |
| Lead Pitch | 0.8 mm |
| Architecture | 16-bit modified Harvard, 8-bit data bus |
Configuration des broches de PIC17C44-33E/PQ
| Broche 1 | RA0/INT0 — PORTA bit 0 / External interrupt 0 |
| Broche 2 | RA1/INT1 — PORTA bit 1 / External interrupt 1 |
| Broche 3 | RA2/INT2 — PORTA bit 2 / External interrupt 2 |
| Broche 4 | RA3/INT3 — PORTA bit 3 / External interrupt 3 |
| Broche 5 | RA4/T0CKI — PORTA bit 4 / Timer 0 clock input |
| Broche 6 | RA5 — PORTA bit 5 |
| Broche 7 | OSC1/CLKIN — Oscillator input / external clock |
| Broche 8 | OSC2/CLKOUT — Oscillator output / clock out |
| Broche 9 | RB0/INT4 — PORTB bit 0 / External interrupt 4 |
| Broche 10 | RB1/INT5 — PORTB bit 1 / External interrupt 5 |
| Broche 11 | RB2 — PORTB bit 2 |
| Broche 12 | RB3 — PORTB bit 3 |
| Broche 13 | RB4 — PORTB bit 4 |
| Broche 14 | RB5 — PORTB bit 5 |
| Broche 15 | RB6 — PORTB bit 6 |
| Broche 16 | RB7 — PORTB bit 7 |
| Broche 17 | VSS — Ground |
| Broche 18 | VDD — Positive supply |
| Broche 19 | RC0 — PORTC bit 0 |
| Broche 20 | RC1 — PORTC bit 1 |
| Broche 21 | RC2 — PORTC bit 2 |
| Broche 22 | RC3 — PORTC bit 3 |
| Broche 23 | RC4 — PORTC bit 4 |
| Broche 24 | RC5 — PORTC bit 5 |
| Broche 25 | RC6 — PORTC bit 6 |
| Broche 26 | RC7 — PORTC bit 7 |
| Broche 27 | RD0 — PORTD bit 0 |
| Broche 28 | RD1 — PORTD bit 1 |
| Broche 29 | RD2 — PORTD bit 2 |
| Broche 30 | RD3 — PORTD bit 3 |
| Broche 31 | RD4 — PORTD bit 4 |
| Broche 32 | RD5 — PORTD bit 5 |
| Broche 33 | RD6 — PORTD bit 6 |
| Broche 34 | RD7 — PORTD bit 7 |
| Broche 35 | RE0 — PORTE bit 0 |
| Broche 36 | RE1 — PORTE bit 1 |
| Broche 37 | RE2 — PORTE bit 2 |
| Broche 38 | MCLR/VPP — Master clear reset / programming voltage |
| Broche 39 | VSS — Ground |
| Broche 40 | VDD — Positive supply |
| 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
PIC17C44-33E/PQ convient pour 6 applications: Industrial Control Systems, Automotive Body and Chassis ECUs, Consumer Appliance Controllers, Security and Alarm Panel Controllers, Data Acquisition Front-Ends, Embedded HMI Display Controllers.
Industrial Control Systems
The PIC17C44-33E/PQ's 33 MHz CPU delivering 8.25 MIPS and its 33 I/O pins make it well suited for industrial control panels driving relays, keypads, and seven-segment displays. The PIC17C family's deterministic 121 ns instruction cycle supports real-time PLC scan loops and PID control tasks where jitter-free execution matters. Its 16 KB OTP holds a substantial control program including state machines, alarm logic, and serial protocol stacks for Modbus or proprietary fieldbus communication. The -40 °C to +125 °C operating range covers factory floor and outdoor cabinet installations.
Recommandé
Automotive Body and Chassis ECUs
The PIC17C44-33E/PQ's Enhanced -40 °C to +125 °C temperature rating and 33 MHz throughput made it a candidate for body-control ECUs managing lighting, wipers, and door modules in 1990s-era vehicles. Its 16 KB OTP held seat-memory, mirror-position, and intermittent-wiper state machines, while 33 I/O lines drove lamp drivers directly. Although now obsolete, it remains in service for legacy vehicle maintenance where firmware compatibility is mandatory. New automotive designs should use PIC18F or dsPIC33 families with CAN-FD and AEC-Q100 Grade 1 qualification.
Recommandé
Consumer Appliance Controllers
White goods such as washing machines, dishwashers, and microwave ovens adopted PIC17C44-33E/PQ for main control boards where 33 MIPS handled motor-control state machines, user-interface keypads, and sensor multiplexing. The 16 KB OTP stored appliance-specific wash cycles, fault-diagnostic trees, and EEPROM emulation routines. The 33 I/O count comfortably drove seven-segment displays, buzzer PWM, triac-fired heater elements, and motor direction relays. For new appliance platforms, Microchip recommends PIC18F46K22 or PIC18F67J10 with integrated mTouch capacitive sensing.
Recommandé
Security and Alarm Panel Controllers
The PIC17C44-33E/PQ's 16 KB OTP and 454 bytes RAM supported hardwired security panels with PIR sensor inputs, keypad scanning, and dialer-modem handshake sequences. The 33 MHz throughput handled periodic sensor-loop polling without missing keypad interrupts. Three 16-bit timers simplified debounce, entry-delay, and siren-cutoff timing. Obsolescence has driven security OEMs to PIC18F252 or PIC18F4620 flash parts with on-chip EEPROM for installer-configurable zone definitions.
Recommandé
Data Acquisition Front-Ends
The PIC17C44-33E/PQ's 8.25 MIPS throughput supported sequential ADC conversion pipelines, linearization math, and UART/SCI data upload in instrumentation front-ends. Its 33 I/O lines configured as multiplexed analog or digital channels via external analog switches. The hardware multiplier (in the wider PIC17C family) accelerated scaling and offset calculations. Modern replacements use PIC18F4550 with USB 2.0 full-speed or dsPIC33EP for higher-resolution signal processing.
Recommandé
Embedded HMI Display Controllers
The PIC17C44-33E/PQ drove character LCD and small graphic LCD panels in industrial HMIs using its 33 I/O lines for parallel data bus and control signals. The 16 KB OTP held menu trees, multi-language fonts, and on-screen keyboard handlers. Its 8.25 MIPS throughput refreshed 4-line by 20-character LCDs without visible flicker. Modern successors use PIC18F67J60 with Ethernet or PIC32MX with TFT controllers for graphic-touchscreen HMIs.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC17C44-33E/PQ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC17C44-25E/PQ | PIC17C44-16I/PQ | PIC17C44-25I/PQ | PIC17C43-25E/PT | PIC17C43T-25E/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin MQFP (PQ) | 44-pin MQFP (PQ) - same | 44-pin MQFP (PQ) - same | 44-pin MQFP (PQ) - same | 44-pin TQFP (PT) - same footprint | 44-pin TQFP (PT) - same footprint |
| Max CPU Clock | 33 MHz (8.25 MIPS) | 25 MHz (6.25 MIPS) | 16 MHz (4 MIPS) | 25 MHz (6.25 MIPS) | 25 MHz (6.25 MIPS) | 25 MHz (6.25 MIPS) |
| Program Memory | 16 KB OTP (8K x 16) | 16 KB OTP | 16 KB OTP | 16 KB OTP | 8 KB OTP | 8 KB OTP |
| RAM Size | 454 bytes | 454 bytes | 454 bytes | 454 bytes | 454 bytes | 454 bytes |
| Operating Temperature | -40C to +125C (E) | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) | -40C to +125C (E) | -40C to +125C (E) |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Principaux différenciateurs
- Highest clock speed in the PIC17C44 family (vs PIC17C44-25E/PQ)
- Enhanced industrial temperature range (vs PIC17C44-25I/PQ)
- Larger program memory vs PIC17C43 family (vs PIC17C43-25E/PT)
Notes de conception
The PIC17C44-33E/PQ requires a stable 33 MHz fundamental-mode crystal or external CMOS clock source on the OSC1/CLKIN pin. Estimated: a 33 MHz crystal with 20 pF load capacitors in a fundamental AT-cut configuration typically provides +/-50 ppm frequency accuracy across the -40C to +125C range. For designs requiring tighter timing accuracy (serial baud rates, infrared protocols), drive OSC1 from an external TCXO rather than relying on the internal oscillator block. The internal four-phase clock divides OSC1 by four, so a 33 MHz input delivers the rated 8.25 MIPS execution rate.
The 44-pin MQFP package requires a 0.8 mm lead-pitch PCB land pattern with adequate solder mask dams between pads. Estimated: minimum pad width 0.30 mm, pad length 1.50 mm, and a solder paste stencil aperture of 0.25 mm x 1.30 mm with 0.05 mm reduction to mitigate solder bridging. Place 100 nF ceramic decoupling capacitors on each VDD pin within 2 mm of the package body, and route VSS directly to a low-impedance ground plane to suppress switching noise on the digital I/O lines.
PIC17C44 OTP memory cannot be erased after programming - each device holds only one firmware image, so always verify code with a windowed/UV-erasable PIC17C44 sample or PIC17C44 JW package before committing production OTP units. The /MCLR pin (pin 38) must be held low during power-up transitions below 1.5 V VDD to prevent spurious code execution; add a 10 kohm pull-up to VDD and a 100 nF cap to ground for power-on-reset delay. The Enhanced 'E' temperature grade is rated to +125C junction - verify thermal rise with theta_JA measurements on your specific PCB layout, as MQFP packages can exhibit thermal coupling with adjacent heat sources.
The PIC17C instruction set differs from the PIC16C and PIC18F architectures - any firmware porting must account for the PIC17C's 16-bit instruction word, hardware 8-bit multiplier, and dedicated multi-source interrupt controller. Source code developed for PIC16F or PIC18F targets will require manual translation. Use MPLAB IDE v5.x or v6.x with the PIC17C44 device pack for assembly development, or third-party compilers such as CCS PCB and Hi-Tech PICC17 for C-language development. In-circuit programming of OTP parts requires PIC17C44 programming algorithms available in MPLAB; verify programmer support before committing to a production flow.
Informations de conformité
PIC17C44-33E/PQ was launched in the 1990s before RoHS compliance was standard. RoHS, lead-free, and halogen-free status are not explicitly documented in the verified web data. AEC-Q100 qualification was not standard for the PIC17C family - the Enhanced temperature grade is industrial-grade, not automotive-qualified. For new automotive designs, migrate to PIC18F or dsPIC33 families with AEC-Q100 qualification.
