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PIC17C44-16E/PQ - 16KB OTP 8-bit MCU 16MHz 44-MQFP | Microchip
PIC17C44-16E/PQ

PIC17C44-16E/PQ - 16KB OTP 8-bit MCU 16MHz 44-MQFP | Microchip

The Microchip Technology PIC17C44-16E/PQ is a high-performance 8-bit CMOS OTP microcontroller from the PIC17C family, operating at up to 16 MHz with 8.25 MIPS (121 ns instruction execution) and packaged in a 44-pin MQFP (10x10 mm). It integrates 16 KB of OTP program memory (8K x 16 words) and 454 bytes of general-purpose RAM, with 33 digital I/O pins suitable for embedded control applications. A microcontroller (MCU) is a single-chip computer that contains a processor core, non-volatile program memory (here One-Time-Programmable OTP), volatile data memory, and peripheral interfaces. The PIC17C family sits above the PIC16C5X/PIC12CXXX/PIC16CXX families in Microchip's 8-bit hierarchy in performance and on-chip resources while remaining source-code compatible at the instruction level. OTP microcontrollers are programmed once with the application firmware and retain the code permanently, making them suited to high-volume production where re-programmability is not required. Key features of the PIC17C44-16E/PQ include an enhanced 8-bit PIC RISC core with only 58 single-word instructions, a multi-source interrupt controller, a hardware multiply unit, and dual 8-bit timer/counters with capture/compare/PWM capability. The device supports both parallel and serial programming modes and offers an extended operating temperature range (industrial grade, indicated by the 'E' suffix) from -40C to +125C. The PIC17C44 architecture combines a 16-bit instruction word with an 8-bit data path, enabling 121 ns minimum instruction cycle at 16 MHz while keeping peripheral register access byte-oriented. Hardware stack depth supports deep subroutine nesting and the device includes dedicated peripheral I/O mapping for direct port manipulation. Compared to PIC16C-series predecessors, the PIC17C44 adds a second timer, additional interrupt sources, and a wider program counter for addressing up to 64 KB of program memory space. Typical applications include industrial control systems, motor control, instrumentation, and high-end embedded control where PIC16C devices lack either memory depth, I/O count, or interrupt capability. The 33 I/O pins and 16 KB of code space comfortably support mid-complexity automation tasks. When designing with the PIC17C44, note that OTP parts cannot be re-programmed in-circuit; development should be performed on a windowed (JW) variant first. A 'PQ' suffix denotes the 44-pin MQFP plastic package, which requires standard SMT reflow profiles. This page synthesizes distributor pricing, lifetime-buy alternatives, and drop-in replacement options not found in the manufacturer datasheet.

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PIC17C44-16E/PT - 8-bit 16MHz 16KB OTP MCU 44-TQFP | Microchip
PIC17C44-16E/PT

PIC17C44-16E/PT - 8-bit 16MHz 16KB OTP MCU 44-TQFP | Microchip

The Microchip PIC17C44-16E/PT is an 8-bit CMOS OTP-based microcontroller from the PIC17C family, operating at up to 16 MHz with 8.25 MIPS (121 ns instruction execution), housed in a 44-pin TQFP (10x10 mm) package. It integrates 16 KB of OTP program memory (organized as 8K x 16) and 454 bytes of general-purpose RAM, with the 'E' suffix denoting the extended industrial temperature grade of -40C to +125C and a 16 MHz maximum clock. An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, integrating a CPU core, program memory (ROM/Flash/OTP), data RAM, and peripherals such as timers, communication ports, and I/O pins. The PIC17C family sits within Microchip's PIC microcontroller hierarchy as a high-performance tier above the baseline PIC16C/PIC12C families, sharing upward code compatibility while adding a wider instruction set (58 single-word instructions), hardware multiply, and a more capable interrupt structure. MCUs belong to the broader semiconductor hierarchy: microcontroller -> embedded processor -> integrated circuit -> semiconductor. Key features include the PIC RISC architecture with single-cycle instruction execution (except branches), a hardware multiplier, multiple timer/counter modules, synchronous/asynchronous serial port (USART), and a priority interrupt controller. The OTP program memory allows one-time programmable firmware storage suited to mature, production-locked designs. Architecturally, the PIC17C44 uses a Harvard-style memory layout with separate program and data buses, allowing simultaneous instruction fetch and data access. The 16-bit instruction word (8K x 16) yields compact, deterministic code, while the 8-bit data path keeps register and ALU operations efficient for control-oriented tasks. Brown-out reset, watchdog timer, and power-saving SLEEP mode enhance field robustness. Typical applications include industrial control systems, embedded instrumentation, motor control front-ends, sensor interfacing, and legacy OEM products whose firmware has been finalized. The extended temperature grade makes the 'E' variant suitable for outdoor, automotive under-hood, and factory-floor deployments where commercial-grade parts would fail. When designing with this part, note that OTP memory cannot be reprogrammed in-circuit; an ICD (In-Circuit Debugger) socket or a flash-based PIC17C/18F equivalent should be used for development. Confirm supply longevity: the Microchip product page recommends the PIC18F442 as a modern alternative. This page synthesizes current distributor pricing, drop-in compatible alternatives, and design notes not found in the manufacturer datasheet alone.

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PIC17C44-16I/L - 8-Bit 16MHz 16KB OTP MCU, 44-PLCC | Microchip
PIC17C44-16I/L

PIC17C44-16I/L - 8-Bit 16MHz 16KB OTP MCU, 44-PLCC | Microchip

The Microchip Technology PIC17C44-16I/L is a high-performance 8-bit CMOS EPROM/ROM microcontroller from the PIC17C family, operating at 16 MHz with 16 KB (8K x 16) of one-time-programmable (OTP) program memory, housed in a 44-pin PLCC (J-Lead) package with industrial temperature grading (-40C to +85C). A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and programmable I/O peripherals on one silicon die. The PIC17C family sits above the PIC16CXX mid-range line and below the PIC18F enhanced family in Microchip's 8-bit portfolio, offering approximately 8.25 MIPS (121 ns instruction cycle) throughput and only 58 single-word instructions while remaining upward compatible with PIC16C5X, PIC12CXXX, and PIC16CXX code. It belongs to the broader category of embedded microcontrollers, semiconductor ICs, and computing platforms. Key features of the PIC17C44 include 33 programmable digital I/O pins, a 16-bit data bus architecture, multiple timer/counter modules, a versatile USART, and 454 bytes of general-purpose RAM for data storage. The supply voltage range of 4.5 V to 6.0 V is well suited to legacy 5 V industrial designs. The /L suffix denotes the 44-lead PLCC (Plastic Leaded Chip Carrier) J-lead surface-mount package with square body shape (package code QCCJ). The architecture is a RISC-based Harvard design with separate program and data paths, a deep hardware stack, and built-in interrupt controller. The OTP program memory allows prototype-to-production code flexibility, and the UV-erasable CERDIP option (-JW suffix) supports field development. Microchip documentation explicitly recommends the newer PIC18F442 as a migration target for new designs. Typical applications include industrial control and monitoring systems, motor drive controllers, smart sensor hubs, and embedded data-acquisition front-ends. The wide I/O count (33 pins) and 16 KB code space make it well suited to protocol-conversion bridges, multi-channel instrumentation, and human-machine interface (HMI) panels. When designing with this part, note that the PIC17C44 is mature and being phased out by Microchip in favor of PIC18F/PIC24 alternatives; designers should validate long-term availability. The OTP memory cannot be re-programmed in-circuit, so production programming must be planned. Always observe the VCC decoupling layout per Microchip's application notes for PIC17C family noise immunity. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found on a single manufacturer page. Sources include Octopart, Heisener, DigiKey, and Microchip's product family documentation. Cross-brand drop-in equivalents are uncommon because the PIC17C44 occupies a specialized industrial niche; same-family speed and temperature variants are the most reliable replacements.

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PIC17C44-16I/P - 8-bit 16MHz 16KB OTP MCU | Microchip
PIC17C44-16I/P

PIC17C44-16I/P - 8-bit 16MHz 16KB OTP MCU | Microchip

The Microchip Technology PIC17C44-16I/P is an 8-bit RISC microcontroller from the PIC17C family, delivering 8.25 MIPS (121 ns instruction execution) from a 16 MHz oscillator in a 40-pin PDIP through-hole package. It integrates 16 KB of one-time-programmable (OTP) program memory organized as 8K x 16 words, 454 bytes of RAM, and 33 digital I/O pins, and operates from a 3.0 V to 5.5 V supply across the industrial -40C to +85C temperature range. The 'I' suffix denotes the industrial temperature grade and the '/P' suffix denotes the 40-pin PDIP package. A microcontroller (MCU) is a single-chip computer containing a CPU core, non-volatile program memory, working RAM, and programmable peripherals. The PIC17C44 belongs to the high-performance tier of Microchip's 8-bit PIC architecture, positioned above PIC16C5X and PIC12CXXX families while remaining upwards source-compatible with the PIC16CXX mid-range family. This hierarchy of 8-bit MCU -> RISC microcontroller -> embedded controller -> semiconductor gives the part its place in modern embedded designs where deterministic instruction timing and simple development matter more than raw compute throughput. Key features include 58 single-word instructions, an 8-level hardware stack, a multiplier for signed/unsigned arithmetic, four counter/timer modules, a USART, two capture/compare/PWM modules, and a watchdog timer with its own on-chip RC oscillator. The OTP EPROM program memory allows prototype-to-production migration with the same die, while the CMOS process keeps typical supply current under 15 mA at 5 V. The 16 MHz clock at 4:1 internal division yields the 4 MHz instruction rate quoted in older literature; at 16 MHz oscillator / 4 the instruction rate is 4 MHz (250 ns), and the 16 MHz MIPS figure Microchip publishes reflects 1:1 instruction-cycle counting in this family. Typical applications include industrial control, motor drive front-ends, instrumentation, security panels, and embedded designs that require deterministic 8-bit control with simple OTP-based code storage. The wide supply range and -40C to +85C operation support factory-floor and outdoor enclosures. Although Microchip recommends migrating new designs to PIC18F442 for flash-based reprogrammability, the PIC17C44 remains in service for long-lifecycle products and legacy board rework where OTP and pinout compatibility matter. When designing with this part, remember that OTP parts cannot be reprogrammed in-circuit and require a UV-windowed CERDIP variant (e.g. PIC17C44-16I/L) for development. Plan a separate programming step using a Microchip or third-party device programmer before PCB conformal coating, and budget for a programming-test yield loss of typically 1-3 percent on first articles.

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PIC17C44-16I/PQ - 8-bit 16MHz 16KB OTP MCU | Microchip PIC17C44
PIC17C44-16I/PQ

PIC17C44-16I/PQ - 8-bit 16MHz 16KB OTP MCU | Microchip PIC17C44

The Microchip Technology PIC17C44-16I/PQ is a high-performance 8-bit CMOS EPROM/ROM microcontroller in the PIC17C family, delivering 8.25 MIPS (121 ns instruction execution) at a 16 MHz clock in a 44-pin MQFP (10x10 mm) package. It integrates 16 KB of one-time-programmable (OTP) program memory organized as 8K x 16 words, 454 bytes of general-purpose RAM, and 33 digital I/O pins, all operating from a single 5 V supply. An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, integrating a CPU core, program memory, data RAM, and peripherals (timers, I/O, serial, ADC) into one package. The PIC17C44 belongs to the broader MCU hierarchy: PIC17C family -> PIC16/PIC17 high-end 8-bit -> 8-bit MCU -> microcontroller -> embedded processor. The "16" suffix in the part number denotes 16 MHz maximum clock, and the "I" denotes the industrial temperature grade (-40C to +85C). Key features include the PIC17 RISC architecture with only 58 single-word instructions, a hardware multiply and divide engine (rare in 8-bit MCUs), 4 analog comparators, 3 timer/counters, a 16-bit watchdog timer, and synchronous/asynchronous serial port (USART) capability. Brown-out reset and power-on reset are integrated, simplifying field deployments. The 44-MQFP package and 5V-only operation suit industrial control boards with established power-rail designs. This device uses Microchip's EPROM/ROM-based CMOS process with an OTP windowless program memory option, and its 16-bit instruction word plus hardware multiplier distinguish it from the smaller-footprint PIC16 family. The PIC17C architecture closes the performance gap between classic 8-bit MCUs and early 16-bit controllers in real-time control loops. Typical applications include industrial motor control, HVAC controls, and consumer appliance control boards. According to the manufacturer product page, the recommended modern replacement is the PIC18F442. Because the PIC17C44 has been discontinued, design reuse across existing 17C44-based PCBs is supported by several PIC17C family speed and temperature variants in the same 44-MQFP footprint. When designing with this part, note that the OTP memory cannot be reprogrammed in-circuit; a windowed ceramic package is required for prototype erasing. The industrial temperature grade from -40C to +85C supports harsh-environment deployment but excludes automotive AEC-Q100 qualification. This page synthesizes distributor availability, drop-in 44-MQFP alternatives, lifecycle status, and practical design notes for engineers evaluating this legacy MCU for new designs or sustaining existing production.

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PIC17C44-16I/PT - 8-Bit 16MHz 16KB OTP MCU, 44-TQFP | Microchip
PIC17C44-16I/PT

PIC17C44-16I/PT - 8-Bit 16MHz 16KB OTP MCU, 44-TQFP | Microchip

The Microchip Technology PIC17C44-16I/PT is a high-performance 8-bit CMOS EPROM/ROM microcontroller in the PIC17C family, delivering 16 MIPS at a 16 MHz clock input and packaged in a 44-pin TQFP (PT) surface-mount package. The device integrates 16 KB of one-time-programmable (OTP) program memory (8K x 16 words), 454 bytes of general-purpose RAM, and 33 digital I/O pins, with a 16-bit wide data bus architecture and Harvard RISC core executing 58 instructions in single cycles. An 8-bit microcontroller (MCU) is a single-chip processor with an 8-bit data path, integrated program memory, RAM, and peripherals designed for deterministic control tasks. Within the broader semiconductor hierarchy, an MCU sits under microcontroller -> embedded processor -> semiconductor device, and the PIC17C44 family sits at the upper end of Microchip's 8-bit portfolio, between the PIC16 mid-range and PIC18 enhanced families. The PIC17C44 is the OTP-programmable variant of the family; the original windowed (UV-erasable) die is also sold as PIC17C44/JW for development. Key specifications include a 16 MHz maximum oscillator input with 121 ns minimum instruction cycle, supply voltage range of 4.5 V to 6.0 V, and industrial-grade -40 °C to +85 °C operating temperature range. The part exposes 33 I/O pins, a hardware USART, multiple timers, and a programmable EPROM program memory, providing a complete control platform without external memory expansion. The 'I' suffix denotes the industrial temperature grade and 'PT' denotes the plastic TQFP-44 package. The architecture uses a 16-bit-wide program memory bus and Harvard structure to fetch instructions and data in parallel. Most instructions execute in a single 121 ns cycle (8.25 MIPS sustained), with only program branches and table reads/writes requiring two cycles. This RISC-style pipeline, combined with a small 58-instruction opcode set, gives the PIC17C44 deterministic interrupt response time well-suited to real-time control loops. Typical applications for the PIC17C44-16I/PT include industrial motor and process control, HVAC and appliance controllers, automotive body electronics (non-safety), and embedded instrumentation front-ends. The wide supply range and 33 I/O pins make it a direct fit for keypad scanning, LED/LCD driving, sensor interfacing, and PWM-actuated actuator control. When designing in this device, confirm the OTP-only memory model fits your production flow: windowed (JW) samples are required for prototype code iteration, and a final masked-ROM (PIC17CR44) spin is available for high-volume runs. Microchip's MPLAB IDE and PICSTART-Plus / PRO MATE II programmers support the family natively. This page consolidates distributor stock and pricing, drop-in PIC17C44 family variants, and practical engineering notes not repeated verbatim in the Microchip datasheet, giving procurement and design engineers a single point of decision.

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PIC17C44-25/P - 8-Bit 25MHz 16KB OTP MCU 40-DIP | Microchip
PIC17C44-25/P

PIC17C44-25/P - 8-Bit 25MHz 16KB OTP MCU 40-DIP | Microchip

The Microchip Technology PIC17C44-25/P is a high-performance 8-bit CMOS EPROM/ROM microcontroller in a 40-pin PDIP package, delivering 8.25 MIPS (121 ns instruction cycle) at a 33 MHz clock input. It integrates 16 KB of OTP program memory (8K x 16), 454 bytes of RAM, and 33 digital I/O pins, executing 58 single-word instructions in a single cycle except for program branches and table reads/writes, which take two cycles. An 8-bit microcontroller (MCU) is a microprocessor-on-a-chip that combines a CPU, RAM, program memory, and peripheral set into a single integrated circuit, forming the lowest tier of the microcontroller -> embedded controller -> embedded system hierarchy. The "PIC" family is a Harvard-architecture RISC MCU line from Microchip with separate program and data buses. The PIC17C sub-family is the high-end 8-bit tier (above PIC16C and PIC12C), and within the PIC17C line the PIC17C44 is the largest-memory variant alongside PIC17C42/42A/43. The "/P" suffix denotes the PDIP-40 package and "-25" denotes the 25 MHz speed grade. Key features of the PIC17C44 include an 8-level deep hardware stack, 16-bit wide program memory bus (16 KB equals 8K instruction words), 454 bytes of general-purpose RAM, and a 16-bit-wide data path that delivers 8.25 MIPS sustained throughput. The OTP program memory (One-Time Programmable EPROM) is windowless and intended for volume production rather than field re-programming; a windowed CERDIP "JW" variant is available for prototype development. The PIC17C44 family uses a 16-bit instruction word and is upward-compatible with PIC16C5X/PIC12CXXX/PIC16CXX source code, easing migration from smaller 8-bit parts. Typical applications include industrial control systems, motor control, instrumentation, and embedded control boards that need 8-bit performance with moderate on-chip memory. Because it is OTP-only and has been superseded by the flash-based PIC18F442 (per Microchip product page), the PIC17C44-25/P is best suited to mature, long-lifecycle production designs where the original code base is locked and re-qualification is undesirable. When designing with the PIC17C44-25/P, configure MCLR, OSC1/OSC2, and the brown-out reset block per the datasheet, and respect the OTP programming algorithm timing. No external program-memory bus is required because all code lives on-chip. This page synthesizes verified distributor inventory (Heisener reports ~4,224 pieces in stock as of 2026-09-25), parametric data, pin-compatible same-family variants from the PIC17C sub-family, and practical design notes not consolidated in the manufacturer datasheet.

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PIC17C44-25/PQ - 8-Bit 25MHz OTP MCU 16KB | Microchip
PIC17C44-25/PQ

PIC17C44-25/PQ - 8-Bit 25MHz OTP MCU 16KB | Microchip

The Microchip Technology PIC17C44-25/PQ is an 8-bit CMOS OTP-based RISC microcontroller running at 25 MHz with 8.25 MIPS throughput, 16 KB (8K x 16) of One-Time-Programmable program memory and 454 bytes of general-purpose RAM, housed in a 44-pin MQFP (10x10 mm) surface-mount package. It integrates 33 digital I/O lines, an 8-bit data path, and Microchip's PIC17C architecture in a square QFP footprint suitable for through-hole-free industrial assemblies. 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.

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PIC17C44-25/PT - 8-Bit CMOS OTP MCU 16KB 25MHz TQFP-44 | Microchip
PIC17C44-25/PT

PIC17C44-25/PT - 8-Bit CMOS OTP MCU 16KB 25MHz TQFP-44 | Microchip

The Microchip Technology PIC17C44-25/PT is a high-performance 8-bit CMOS EPROM/ROM microcontroller delivering 8.25 MIPS at a 25 MHz clock input, housed in a 44-pin TQFP (PT) surface-mount package. It integrates 16KB of One-Time-Programmable (OTP) program memory organized as 8K x 16, executes instructions in a 121 ns single cycle (except program branches and table reads/writes which take two cycles), and operates from a 5V supply. A microcontroller (MCU) is a single-chip computer that contains a processor core, memory, and programmable I/O peripherals. The PIC17C44 belongs to the high-tier PIC17 family of 8-bit MCUs from Microchip - sitting above PIC16 mid-range parts - and is part of the broader PICmicro 8-bit family that pioneered the Harvard RISC architecture for embedded control. OTP variants such as the -25/PT are intended for low-to-medium volume production where field programmability is not required, while still leveraging the PIC instruction set. Key features of the PIC17C44-25/PT include only 58 single-word instructions for fast code development, hardware multiply (8 x 8 in one cycle) inherited from the PIC17 architecture, a 16-level hardware stack for efficient subroutine handling, and compatibility upward from the PIC16C5X, PIC12CXXX, and PIC16CXX device families. The device is rated for the commercial temperature grade and ships in a TQFP-44 surface-mount package with gull-wing leads. From an architectural standpoint the PIC17C44 implements a true RISC design with separate program and data buses. Its 16-bit instruction word supports direct, indirect, and literal addressing modes; combined with hardware multiply this gives substantially higher throughput than PIC16 mid-range parts at the same clock. The '25' speed suffix denotes a 25 MHz maximum oscillator input; the same die is also offered at 33 MHz and with industrial ('I') temperature grades. Typical applications include industrial control, motor drive, automotive body electronics, instrumentation, and general-purpose embedded systems. The Microchip product page recommends considering the PIC18F442 as a newer actively-produced alternative for new designs, while the PIC17C44-25/PT continues to serve legacy production lines and existing PIC17 firmware ports. Compared with PIC16F parts, the PIC17C44 delivers roughly four times the execution throughput, but with higher unit cost and limited in-system programmability. When designing with the PIC17C44-25/PT ensure the VDD decoupling network follows the Microchip PIC17 reference layout, do not exceed 25 MHz at the OSC1 input, and observe the two-cycle penalty for GOTO, CALL, and table-read/write operations when calculating worst-case interrupt latency. A reset supervisor or proper MCLR pull-up is required for reliable cold-start operation. This page synthesizes distributor stock, current unit pricing, package data, and same-family drop-in alternatives not aggregated on any single distributor listing, providing a faster sourcing decision than datasheet parsing alone.

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PIC17C44-25E/P - 8-Bit 25MHz CMOS OTP MCU 16KB | Microchip
PIC17C44-25E/P

PIC17C44-25E/P - 8-Bit 25MHz CMOS OTP MCU 16KB | Microchip

The Microchip PIC17C44-25E/P is a high-performance 8-bit CMOS OTP-based microcontroller delivering 8.25 MIPS (121 ns instruction execution) in a 40-pin PDIP package. It packs 16KB of OTP program memory (8K x 16), 454 bytes of RAM, and 33 general-purpose I/O pins. The "25E" suffix denotes 25 MHz maximum operating frequency at the extended industrial temperature range. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals onto one die. Microcontrollers sit in the embedded computing hierarchy between microprocessors (which need external peripherals) and ASICs (which are application-specific). The PIC17 family specifically bridges the gap between the simpler PIC16 family and higher-end dsPIC devices, targeting complex embedded control with C-friendly architectures and an enhanced instruction set. Key features of the PIC17C44 include an 8-level deep hardware stack, multiply instruction, multiple interrupt sources with prioritized vectored interrupts, four capture/compare/PWM (CCP) modules, a USART with addressable hardware, an 11-channel 8-bit ADC, and a watchdog timer with on-chip RC oscillator. These peripherals deliver a richer feature set than PIC16C5X predecessors while keeping code compatibility upward toward PIC18. The PIC17C44 uses Harvard architecture with separate program and data buses, plus a 16-bit wide program memory path that fetches instructions in a single cycle. This wider path, combined with a 25 MHz clock, is how it attains 8.25 MIPS performance. The wide instruction word also contributes to the relatively large 16KB program memory size for what is otherwise classified as an 8-bit MCU. Typical applications include industrial control systems, motor control (when paired with the CCP/PWM peripherals), appliance controllers, automotive body electronics, security and access systems, and instrumentation front-ends. The wide I/O count of 33 also makes it useful for LED display controllers and keypad-scanning human-machine interfaces. When designing with the PIC17C44-25E/P, ensure the external oscillator network matches the device's 25 MHz rating - a crystal oscillator or ceramic resonator with proper loading capacitors is required. Because this is an OTP (One-Time-Programmable) part, firmware must be fully verified before final programming; there is no field re-programmability. This page synthesizes XAIPART distributor pricing, same-brand drop-in alternatives within the PIC17C family, and practical design considerations not found in the manufacturer datasheet.

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PIC17C44-25E/PQ - 8-Bit 25MHz OTP MCU, 16KB, 44-MQFP | Microchip
PIC17C44-25E/PQ

PIC17C44-25E/PQ - 8-Bit 25MHz OTP MCU, 16KB, 44-MQFP | Microchip

The Microchip Technology PIC17C44-25E/PQ is an 8-bit CMOS OTP (One-Time Programmable) microcontroller from the PIC17C family, running at a 25 MHz external oscillator input with 8.25 MIPS (121 ns instruction execution) throughput, housed in a 44-pin Metric MQFP (PQ) package. What is a PIC17C microcontroller? The PIC17C is Microchip's mid-1990s high-end 8-bit MCU family that extended the classic PIC16C instruction set with additional instructions, multiple interrupt vectors, hardware multiply, and an external program/data bus interface. PIC17C devices sit in the hierarchy: microcontroller -> embedded MCU -> 8-bit MCU -> PIC architecture -> Microchip PIC family. They were the first PIC family to expose an external memory bus and to provide hardware peripheral features that later became standard on PIC18F devices. Key features of the PIC17C44-25E/PQ include 16 KB of OTP program memory (organized as 8K x 16 instruction words), 454 bytes of general-purpose RAM, 33 digital I/O pins, an external oscillator interface, and a wide 4.5V to 6.0V supply range. The "25E" suffix denotes the 25 MHz maximum clock and the Extended (industrial) temperature grade. The "PQ" suffix denotes the 44-pin Metric Quad Flat Package. The PIC17C44 uses Microchip's classic two-stage pipeline and Harvard architecture, with separate program and data buses. Each instruction is 16 bits wide and most execute in a single 121 ns cycle at 25 MHz, giving 8.25 MIPS sustained throughput. The wide OTP program word (16 bits) increases code density relative to 14-bit PIC16C devices. OTP memory is one-time programmable, suitable for production runs where firmware is finalized. Typical applications for the PIC17C44-25E/PQ include industrial control boards, embedded sensor interfaces, motor control peripherals, and legacy replacement designs originally built around the PIC17C4X platform. The part is also used in instrumentation front-ends, security panels, and telecom line-interface modules where the original PIC17C firmware was qualified. Designers often select it to maintain firmware and PCB compatibility with installed PIC17C44 systems. When designing with the PIC17C44, ensure the oscillator source can deliver a clean, jitter-free 25 MHz clock and that the 5V rail stays within the 4.5V to 6.0V supply window. The OTP window is one-time only, so firmware must be fully validated before programming. For new designs, Microchip recommends migrating to the PIC18F442 family, which is source-code compatible and offers in-circuit reprogrammability (Flash). This page synthesizes distributor pricing, parameter cross-checks against the Microchip datasheet, and pin-compatible replacement guidance not found in the original datasheet PDF.

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PIC17C44-25E/PT - 8-Bit 25MHz OTP MCU 16KB | Microchip
PIC17C44-25E/PT

PIC17C44-25E/PT - 8-Bit 25MHz OTP MCU 16KB | Microchip

The Microchip Technology PIC17C44-25E/PT is an 8-bit, OTP (One-Time Programmable) CMOS microcontroller from the legacy PIC17C family, delivering 8.25 MIPS performance (121 ns instruction cycle) at a 25 MHz external clock, and packaged in a 44-pin TQFP (PT) surface-mount form factor. Headline specifications are 16 KB (8K x 16) of OTP program memory, 454 bytes of RAM, 33 digital I/O lines, an external oscillator interface, and a 25 MHz maximum operating frequency. An 8-bit microcontroller (MCU) is a programmable logic device that executes instructions from on-chip program memory and interacts with the outside world through digital I/O, timers, and serial peripherals. In the broader taxonomy, an MCU is a member of the microcontroller class, itself a sub-family of microprocessors (MPU / CPU) that integrate the CPU core, RAM, ROM/Flash, and peripherals on a single die. The PIC17C family, sitting between PIC16C and PIC18 in Microchip's roadmap, was the first 8-bit PIC line to break the 10 MIPS barrier, using a 16-bit instruction word against an 8-bit data path to maximize code density and arithmetic throughput. Key features that distinguish the PIC17C44-25E/PT include its 121 ns single-cycle instruction execution (two-cycle for branches and table reads/writes), a Harvard architecture with separate program and data buses, a four-stage instruction pipeline, and a wide operating voltage range typical of the family. The 'E' suffix indicates the extended industrial temperature grade (-40 °C to +125 °C), making the part suitable for harsh environments outside the commercial 0-70 °C window. The PIC17C architecture is upwards-compatible with the PIC16C5X, PIC12CXXX, and PIC16CXX instruction sets, simplifying firmware portability across Microchip generations. The internal architecture uses a RISC-based instruction set of only 58 single-word instructions, an 8-level hardware stack, and multiple interrupt sources. The wide 16-bit instruction word fetches each opcode in a single cycle, and the data path handles 8-bit arithmetic with dedicated hardware multiply and divide support in later PIC17 derivatives. The PIC17C44 in particular integrates 16 KB of OTP program memory, the largest in the family at introduction. Typical applications include industrial control systems, motor control front-ends, instrumentation, legacy embedded control boards, and any retrofit design that must source an authentic PIC17C44 die for an existing OTP-programmed production line. The 33 I/O pins and the 16-bit timer/counter bank support keypad scanning, LED matrix driving, and parallel sensor aggregation. When designing around this part, note that OTP memory cannot be reprogrammed; engineers typically prototype with a windowed (JW) variant or a pin-compatible flash part such as the PIC18F442 (recommended by Microchip as a functional migration path, although the forum record notes the PIC18F452 is not pin-for-pin compatible). Power, ground, and decoupling capacitor placement must follow the standard PIC17C reference layout to avoid oscillator glitches above 20 MHz.

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PIC17C44-25I/P - 8-Bit 25MHz 16KB OTP MCU 40-PDIP | Microchip
PIC17C44-25I/P

PIC17C44-25I/P - 8-Bit 25MHz 16KB OTP MCU 40-PDIP | Microchip

The Microchip Technology PIC17C44-25I/P is a high-performance 8-bit CMOS EPROM/ROM microcontroller from the PIC17C family, delivering 8.25 MIPS (121 ns instruction execution) in a 40-pin PDIP through-hole package. It features a 25 MHz maximum clock speed, 16 KB (8K x 16) of One-Time-Programmable (OTP) program memory, and operates from a 4.5 V to 6 V supply. According to the Microchip datasheet, the device includes 454 bytes of RAM, 33 digital I/O lines, and the powerful PIC RISC architecture with only 58 single-word instructions, balancing throughput with ease of programming. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, and peripheral I/O on one die. The PIC17C family sits at the high end of Microchip's 8-bit hierarchy (PIC10/12/16/17/18), delivering up to 8.25 MIPS performance with a RISC instruction set. The PIC17C44 belongs to the broader embedded microcontroller category within semiconductor ICs, sitting below application processors but above simple discrete logic in capability. Key differentiating specifications include the 25 MHz operating frequency (equivalent to a 121 ns instruction cycle), 16 KB of OTP program memory organized as 8K x 16 words, and a wide 33 I/O count for parallel control applications. The device uses an external clock source and supports interrupt-driven operation with multiple peripheral interfaces typical of the PIC17C series. The PIC17C44 is built on Microchip's CMOS EPROM/ROM process with the PIC17C RISC core, providing faster execution than the earlier PIC16 family while maintaining source-level compatibility with PIC mid-range assembly. Its OTP memory allows one-time field programming for production units, while windowed CERDIP variants (JW package) support development and prototyping with UV erasure. Typical applications include industrial control systems, motor control interfaces, embedded data acquisition, and legacy equipment maintenance. The 33 I/O count suits parallel keypad scanning, LED multiplexing, and discrete logic replacement in factory automation. The OTP memory model is well-matched to mature production designs where firmware is finalized. When designing with this part, verify supply voltage stays within 4.5 V to 6 V and provide adequate decoupling on VDD pins. Note that the PIC17C44 is a mature/legacy product; Microchip recommends the PIC18F442 as the modern migration path, although pinout compatibility is not guaranteed. Plan a board-level migration if long-term availability is critical. This page synthesizes distributor pricing, same-family alternatives, and practical migration notes for the PIC17C44-25I/P that the bare manufacturer datasheet does not provide.

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PIC17C44-25I/PQ - 25MHz 8-bit CMOS OTP MCU, 44-PQFP | Microchip
PIC17C44-25I/PQ

PIC17C44-25I/PQ - 25MHz 8-bit CMOS OTP MCU, 44-PQFP | Microchip

The Microchip Technology PIC17C44-25I/PQ is a high-performance 8-bit CMOS EPROM/ROM-based microcontroller delivering 8.25 MIPS (121 ns instruction execution) with only 58 single-word instructions, packaged in a 44-pin Plastic Quad Flat Pack (MQFP/PQFP). According to the PIC17C42/42A/43/44 datasheet family, the device integrates 16 KB of OTP program memory (8K x 16 words), 454 bytes of general-purpose RAM, and 33 digital I/O pins. A microcontroller (MCU) is a single-chip computer containing a CPU core, non-volatile program memory, volatile data memory (RAM), and programmable peripheral modules. The PIC17C44 belongs to the 8-bit RISC MCU category - microcontrollers optimized for deterministic instruction execution, low power, and ease of embedded use. It sits in Microchip's hierarchy as PIC17C44 -> PIC17 family -> 8-bit PIC MCU -> microcontroller -> embedded semiconductor. It is upward-compatible with PIC16C5X, PIC12CXXX, and PIC16CXX devices, simplifying code portability. Key features include a 25 MHz maximum clock (the "-25" speed grade), industrial operating temperature range (-40C to +85C, the "I" suffix), 8.25 MIPS throughput, an 8-level deep hardware stack, and a 16-bit instruction word architecture (Harvard). The PIC17C44 is the OTP (One-Time-Programmable) EPROM variant; the "CR" siblings in the family use mask ROM. On-chip peripherals include timers, a USART, and capture/compare/PWM modules. Architecturally, the PIC17C44 uses a 16-bit-wide instruction path with separate 8-bit data path, giving C-source compatibility with PIC18 while retaining the 8-bit PIC16 toolchain feel. The 121 ns instruction cycle at 25 MHz provides ample headroom for closed-loop control loops in motor and power conversion applications. Typical applications include industrial control systems, motor drive signal conditioning, embedded instrumentation, and legacy equipment retrofits. The PIC17 family is now mature and used predominantly in long-life-cycle industrial and aerospace programs that were designed-in during the 1990s. Microchip recommends PIC18F442 as the modern pin-compatible successor for new designs. When designing with the PIC17C44-25I/PQ, note that OTP parts require a device programmer with EPROM/UV-erase support for prototyping; consider the flash-based PIC18F442 or PIC18F452 for production-ready designs. The 44-pin PQFP has gull-wing leads suitable for SMT reflow but requires careful land-pattern design. This page synthesizes distributor pricing, lifecycle risk notes, drop-in alternatives, and practical design guidance not found in the standalone manufacturer datasheet.

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PIC17C44-33/L - 8-bit 33MHz OTP MCU 16KB | Microchip 44-PLCC
PIC17C44-33/L

PIC17C44-33/L - 8-bit 33MHz OTP MCU 16KB | Microchip 44-PLCC

The Microchip Technology PIC17C44-33/L is an 8-bit CMOS EPROM/OTP-based microcontroller in the PIC17C family, delivering 8.25 MIPS performance at 33 MHz clock frequency with 121 ns instruction execution. The device integrates 16 KB of OTP program memory (8K x 16 words), 454 bytes of general-purpose RAM, and 33 digital I/O lines, all housed in a 44-pin PLCC (J-Lead) package measuring 16.59 x 16.59 mm. Background: An 8-bit microcontroller (MCU) is a single-chip computer that combines a CPU core, program memory (ROM/EPROM/Flash/OTP), data RAM, and peripheral interfaces on one die. The PIC17C family was Microchip's first architecture to use a 16-bit program word width and a 4-stage pipeline, predating the now-dominant PIC18F and dsPIC families. OTP (One-Time Programmable) memory can be written exactly once, making these parts economical for mature, high-volume production where firmware is finalized, and they remain a classic choice for legacy industrial control. Key features include the PIC RISC instruction set with 58 single-word instructions, multiple interrupt sources, a hardware multiplier, and a 16-bit wide instruction path. The 33 I/O pins each support digital I/O with programmable direction, and the device operates from a 5 V supply. External memory and peripheral expansion are accessible through the PIC17C44's external memory bus. Architecturally, the PIC17C44 uses a Harvard memory organization (separate program and data buses) and a 4-stage instruction pipeline, which is the source of its 8.25 MIPS throughput. The OTP program memory is windowless and cannot be erased, so design teams typically prototype with UV-erasable windowed variants (e.g., PIC17C44JW) before committing to OTP for production. Typical applications include industrial control systems, motor control, instrumentation, and embedded products requiring deterministic 8-bit processing. The 5 V supply and 33 MHz speed are well-matched to legacy sensor interfaces and actuator drivers. When designing with this device, verify that the 5 V supply tolerance matches your analog front-end and that pull-ups on MCLR are present. Because the part is OTP and now classified NRND/Obsolete, plan a migration path to PIC18F442 (recommended by Microchip) for new designs. This page synthesizes distributor pricing, legacy lifecycle status, drop-in alternative MPNs, and practical design notes not found in the manufacturer datasheet alone.

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PIC17C44-33/P - 33MHz 8-Bit OTP MCU 16KB | Microchip
PIC17C44-33/P

PIC17C44-33/P - 33MHz 8-Bit OTP MCU 16KB | Microchip

The Microchip Technology PIC17C44-33/P is an 8-bit, high-performance RISC CMOS EPROM/ROM microcontroller operating at up to 33 MHz with 8.25 MIPS (121 ns instruction cycle) throughput, packaged in a 40-pin PDIP. It integrates 16 KB (8K x 16) of One-Time-Programmable program memory, 454 bytes of on-chip data RAM, and 33 digital I/O lines organized as ports. What is a PIC17C microcontroller? The PIC17C family was Microchip's highest-end 8-bit PIC architecture before the PIC18 generation, optimized for high-throughput C-coded embedded applications that needed more code space and I/O than the PIC16 family could deliver. The PIC17C44 specifically adds a 16-bit-wide instruction word and an 8-level hardware stack, positioning it in the 8-bit microcontroller hierarchy between entry-level PIC16F parts and the newer PIC18F series that eventually replaced it. It belongs to the broader RISC microcontroller taxonomy -> CMOS microcontroller -> embedded controller -> semiconductor IC. Key specifications include 33 MHz maximum clock frequency, 4.5 V to 6 V supply range, 33 I/O pins, 6 timers, 2 external interrupt sources, and a 16-bit program memory bus architecture. The OTP program memory allows prototype-to-production programming flexibility, while the 454-byte RAM suits data acquisition and small protocol stacks. The 40-pin PDIP form factor supports through-hole assembly and breadboard prototyping. The PIC17C44-33/P uses a RISC instruction set with only 58 single-word instructions, simplifying code generation and reducing compiler complexity for the era. Its 121 ns instruction execution at 33 MHz enables deterministic real-time control, and its 16-bit instruction path allows most instructions to execute in a single cycle. The architecture is well documented in Microchip's reference manual family and supported by legacy MPLAB toolchains. Typical applications include industrial control systems, automotive subsystems, motor control boards, instrument panels, and embedded sensor interfaces that benefit from OTP flexibility during development. The wide operating voltage range and 33 I/O lines also support LED driver panels, keypad scanners, and small-form user-interface modules. When designing with this part, designers should note that the PIC17C44 is a legacy device and Microchip recommends migrating to PIC18F442. Use an external oscillator or crystal within the rated frequency range, and respect the 4.5-6 V supply window. Decoupling capacitors near VDD/SS pins are essential for reliable CMOS operation. This page synthesizes distributor pricing, lifecycle flags, drop-in alternative candidates from the same PIC17C family, and practical design notes not consolidated on a single manufacturer or distributor page.

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PIC17C44-33/PQ - 33MHz 8-bit OTP MCU, 16KB, 44-MQFP | Microchip
PIC17C44-33/PQ

PIC17C44-33/PQ - 33MHz 8-bit OTP MCU, 16KB, 44-MQFP | Microchip

The Microchip Technology PIC17C44-33/PQ is an 8-bit CMOS OTP-based RISC microcontroller in the PIC17C family, delivering 8.25 MIPS performance with a 121 ns instruction cycle at a 33 MHz external clock. It integrates 16 KB of OTP program memory (8K x 16 words), 454 bytes of general-purpose RAM, and 33 digital I/O pins inside a 44-pin Metric Quad Flat Pack (MQFP) package operating from a 5 V supply. Background knowledge: an 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, RAM, and peripherals around an 8-bit data bus; the PIC architecture family in particular follows a RISC instruction set with a fixed-width instruction word. The PIC17C family sits above the baseline PIC16C line and adds a wider instruction word, more addressing modes, a hardware multiplier, and higher throughput, while remaining object-code compatible with the earlier PIC17C42A die. OTP (One-Time Programmable) EPROM-based variants like the PIC17C44 are intended for volume production where the firmware is finalized at assembly time, unlike flash-based parts that can be re-programmed in the field. Key features of the PIC17C44-33/PQ include 58 single-word instructions, a 16-level hardware stack, four 8-bit I/O ports (PORTA through PORTD, plus a partial PORTE), two 8-bit timers plus one 16-bit timer with capture/compare/PWM capability, a USART with addressable mode, and a watchdog timer with its own on-chip RC oscillator. The 33 MHz speed grade ('-33') specifies the maximum oscillator input; the device also offers -16 and -25 MHz speed grades. An in-circuit serial programming (ICSP) interface and a 14-bit instruction width round out the feature set. Typical applications include industrial control panels, embedded instrumentation, motor-control front-end boards, point-of-sale terminals, and legacy embedded products designed around the PIC17C architecture. Per the manufacturer product page, Microchip explicitly recommends the PIC18F442 as the recommended migration path for new designs. When designing with the PIC17C44-33/PQ, observe the brown-out reset voltage threshold and ensure the OTP programming voltage profile matches the Microchip programming specification; the device is in a Metric QFP package so PCB land pattern must match JEDEC MO-108. Decoupling should follow Microchip's PIC17C family reference design with a 0.1 microfarad ceramic capacitor per supply pin. This page synthesizes distributor pricing, same-package drop-in alternatives, and practical design notes for legacy PIC17C44 designs not found in the original manufacturer datasheet.

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PIC17C44-33E/P - 8-Bit 33MHz OTP MCU 16KB | Microchip
PIC17C44-33E/P

PIC17C44-33E/P - 8-Bit 33MHz OTP MCU 16KB | Microchip

The Microchip Technology PIC17C44-33E/P is a high-performance 8-bit CMOS EPROM/ROM microcontroller belonging to the PIC17C family, delivering 8.25 MIPS (121 ns instruction execution) through a 33 MHz clock. It integrates 16 KB (8K x 16) of One-Time Programmable (OTP) program memory and 454 bytes of general-purpose RAM, housed in a 40-pin PDIP through-hole package with 33 digital I/O lines. The device operates across a 4.5 V to 6.0 V supply range with an extended industrial temperature grade of -40 °C to +125 °C (denoted by the "E" suffix). A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data RAM, and configurable peripherals (I/O, timers, communications) into one package. Within the broader semiconductor taxonomy, an MCU sits inside the embedded computing hierarchy: transistor -> integrated circuit -> logic IC -> microcontroller -> 8-bit MCU -> PIC17C family. The PIC17C44 specifically targets high-throughput 8-bit applications that require more horsepower than the PIC16C family while remaining code-compatible with PIC16C5X, PIC12CXXX, and PIC16CXX devices. Key features include a RISC architecture with only 58 single-word instructions, four-cycle and eight-cycle hardware multiplier options, a 17-bit instruction word with 16-bit data path, and a multi-source interrupt controller with programmable priority. On-chip peripherals include three 16-bit timer/counters, a Universal Synchronous/Asynchronous Receiver/Transmitter (USART), and an 8-bit parallel slave port. The microcontroller supports external oscillator inputs with configurable crystal/ceramic resonator modes up to 33 MHz. Typical applications span industrial control systems, automotive body and chassis modules, consumer appliance controllers, HVAC systems, security and alarm panels, and point-of-sale terminals. With 33 I/O pins and abundant peripheral integration, the PIC17C44 fits legacy 8-bit embedded designs where deterministic real-time response, proven PIC architecture, and OTP cost-effectiveness outweigh the higher code density of newer 16-bit or 32-bit MCUs. Designers commonly pair it with EEPROM, LCD driver, and RS-232/RS-485 transceiver companions to complete a full control node. When designing with this part, verify that your compiler toolchain (MPLAB XC8 legacy mode or MPASM) supports the PIC17C instruction set, and confirm that the 40-pin PDIP land pattern is acceptable for your production assembly process (reflow soldering requires an SOIC variant). OTP memory cannot be re-programmed in-circuit - the PIC17C44-33E/P should be ordered pre-programmed from Microchip or burned with a UV-erasable sibling (PIC17C44/JW) for development.

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PIC17C44-33E/PQ - 33MHz 8-bit OTP MCU, 16KB, 44-QFP | Microchip
PIC17C44-33E/PQ

PIC17C44-33E/PQ - 33MHz 8-bit OTP MCU, 16KB, 44-QFP | Microchip

The Microchip Technology PIC17C44-33E/PQ is a high-performance 8-bit CMOS EPROM/ROM microcontroller from the PIC17C family, delivering up to 33 MHz CPU clock (8.25 MIPS, 121 ns instruction cycle) in a 44-pin MQFP (PQ) package. It integrates 16 KB of One-Time Programmable (OTP) program memory (8K x 16 words), 454 bytes of general-purpose RAM, and 33 digital I/O lines organized across multiple ports. 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.

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PIC17C44-33I/PQ - 16KB OTP 8-bit MCU, 33MHz, 44-QFP | Microchip
PIC17C44-33I/PQ

PIC17C44-33I/PQ - 16KB OTP 8-bit MCU, 33MHz, 44-QFP | Microchip

The Microchip Technology PIC17C44-33I/PQ is a CMOS OTP-based 8-bit RISC microcontroller in the PIC17C family, delivering 8.25 MIPS (121 ns instruction execution) at 33 MHz, housed in a 44-pin QFP (PQ) industrial-temperature package. It integrates 16 KB of one-time-programmable program memory (8 K × 16 words), 454 bytes of RAM, and 33 digital I/O pins, supporting a 5V single-supply design. The PIC17C44-25I/PQ provides industrial-grade operation from -40C to +85C. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data RAM, and peripherals. The PIC17C family sits at the top of Microchip's legacy 8-bit OTP architecture, between the PIC16C mid-range family and the PIC18 enhanced family, and uses a RISC instruction set with only 58 single-word instructions. This 8-bit hierarchy falls within the broader category of embedded microcontrollers -> microcontrollers -> microcontrollers -> integrated circuits. OTP (one-time-programmable) memory is a type of non-volatile program memory that can be written once and is suitable for volume production where firmware is stable. Key features include 16 KB OTP program memory, 454 bytes RAM, 33 general-purpose I/O pins, 8.25 MIPS throughput, 8-channel 8-bit ADC (per family datasheet), USART, synchronous serial port, capture/compare/PWM modules, watchdog timer with on-chip RC oscillator, and dual analog comparators. The 33 MHz external clock supports the highest speed grade of the PIC17C44 silicon, and the I-suffix confirms the industrial temperature grade (-40C to +85C). Architecturally, the PIC17C44 is the enhanced member of the PIC17C family with a 16-bit instruction word and an 8-bit data path, making it the fastest 8-bit OTP part Microchip offered at the time. It is upwards-compatible with PIC16C5X, PIC12CXXX, and PIC16CXX devices, simplifying migration from PIC15.x. The PQ suffix denotes a 44-pin plastic QFP. Typical applications include industrial control systems, motor control front-ends, instrument front panels, security panels, and embedded control boards where a one-time-programmed 8-bit MCU is sufficient. Designers may also evaluate the newer PIC18F442 as a recommended successor with flash memory. When designing with this device, remember that OTP memory cannot be erased, so firmware must be fully validated before production programming. Plan emulator/ICE access for prototype debug and ensure in-circuit programming tooling matches the OTP device class. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers and buyers a single source for evaluation.

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PIC17C44-33I/PT - 8-Bit 33MHz MCU 16KB OTP 44-TQFP | Microchip
PIC17C44-33I/PT

PIC17C44-33I/PT - 8-Bit 33MHz MCU 16KB OTP 44-TQFP | Microchip

The Microchip Technology PIC17C44-33I/PT is an 8-bit CMOS OTP (One-Time Programmable) microcontroller built on Microchip's PIC® 17C architecture, operating at up to 33MHz and housed in a 44-pin TQFP (10x10 mm) surface-mount package. It integrates 16KB of program memory (organized as 8K x 16 words) and 454 bytes of data RAM, paired with 33 digital I/O pins, making it suitable for embedded control applications requiring deterministic 8-bit processing. The '33' suffix indicates a 33MHz maximum clock frequency delivering up to 8.25 MIPS (121 ns instruction execution), and the 'I' suffix denotes industrial-grade temperature operation. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable I/O peripherals on one die. Within the broader semiconductor taxonomy, microcontrollers sit under microprocessors -> processors -> logic ICs -> integrated circuits. The PIC® 17C family extends Microchip's PIC® 16C mid-range architecture into a high-throughput segment, adding 16-bit instruction words and additional peripheral resources while preserving an upward-compatible instruction set across PIC16C5X, PIC12CXXX, and PIC16CXX devices. Key features of the PIC17C44-33I/PT include 8.25 MIPS throughput at 33MHz, an OTP program memory model (programmed once via UV or one-time programming equipment), 33 I/O lines, integrated peripherals typical of the PIC17C family, and CMOS low-power operation. The industrial temperature grade (-40C to +85C) supports factory, instrumentation, and harsh-environment deployments. The PIC17C44 is built on Microchip's mature CMOS OTP process and supports 58 single-word instructions in a RISC-like pipeline. Because the part is OTP rather than flash, it targets cost-sensitive, high-volume production where firmware is stable and field re-programmability is not required. Microchip recommends migrating to PIC18F442 for new designs, as the PIC17C44 is in legacy status. Typical applications include industrial motor and appliance control, instrumentation front-ends, automotive body and convenience subsystems (where this specific -I variant is qualified), white-goods controllers, and embedded control replacement of legacy 8051/PIC16C designs requiring higher throughput. Drop-in alternatives in the same 44-TQFP package are scarce; consult the alternatives section for same-footprint PIC17C family or PIC18F families. Designers should plan firmware migration to a flash-based PIC18F or enhanced PIC16F device for new designs, since OTP memory prevents in-system re-programming during development iteration. A socketed windowed (JW) variant exists for prototyping; OTP parts ship in surface-mount TQFP only and require a programming step before PCB assembly. This page synthesizes distributor stock, cross-reference information from DigiKey/Octopart, and practical engineering context not found in the bare datasheet, including availability risk, package-level comparison, and migration guidance.

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PIC17C44/JW - 8-bit OTP MCU, 16KB EPROM, 33MHz | Microchip
PIC17C44/JW

PIC17C44/JW - 8-bit OTP MCU, 16KB EPROM, 33MHz | Microchip

The Microchip Technology PIC17C44/JW is an 8-bit RISC microcontroller from the PIC17C family, featuring 16KB of EPROM program memory (organized as 8K x 16), 454 bytes of data RAM, and 33 programmable I/O lines. It operates at a maximum clock frequency of 33 MHz, delivering up to 8.25 MIPS with a 121 ns instruction execution time. The device is housed in a 40-pin through-hole CERDIP (JW) package rated for commercial temperature grades. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data memory, and programmable I/O peripherals. Within the broader taxonomy, the PIC17C44 sits in the 8-bit microcontroller category of the microcontroller IC family, which in turn belongs to embedded processors and microcontrollers. The PIC17C architecture uses Harvard memory organization with separate program and data buses, enabling simultaneous instruction fetch and data access. Key features include only 58 single-word instructions, an OTP (One-Time Programmable) EPROM-based program memory, a CMOS process technology for low power consumption, and 33 digital I/O pins. The architecture supports nested interrupts and a hardware multiply unit, which was distinctive for an 8-bit MCU at the time of introduction. The 16-bit instruction width allows most instructions to encode both opcode and operand in a single word. Typical applications include industrial control systems, legacy embedded designs, motor control firmware platforms, and educational/training platforms where the OTP memory and CERDIP package support prototyping through-window UV erasure. The through-hole CERDIP package remains useful in legacy equipment repair and aerospace/military applications where socketed parts and field re-programmability via UV erasure are valued. When designing with this part, note that the OTP memory cannot be electrically erased - only the JW (windowed CERDIP) variant allows UV erasure for prototyping. Production builds typically use the non-windowed variants. Consider the PIC18F442, recommended by Microchip as a newer substitute offering Flash memory and enhanced peripherals in a compatible footprint family. This page synthesizes distributor pricing, drop-in alternatives within the PIC17C family, and practical design notes not consolidated in the manufacturer datasheet.

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PIC17C44T-16/L - 8-Bit 16MHz OTP MCU 16KB 44-PLCC | Microchip
PIC17C44T-16/L

PIC17C44T-16/L - 8-Bit 16MHz OTP MCU 16KB 44-PLCC | Microchip

The Microchip Technology PIC17C44T-16/L is an 8-bit RISC microcontroller in the PIC17C family, integrating 16KB (8K x 16) of One-Time-Programmable (OTP) program memory, 454 bytes of RAM, and a maximum operating frequency of 16 MHz. Housed in a 44-pin PLCC (Plastic Leaded Chip Carrier) J-lead package measuring 16.59 mm x 16.59 mm, this OTP-based part provides non-volatile program storage suited to medium-volume production runs where UV-erasure is not required. An 8-bit microcontroller is a single-chip computer that processes data 8 bits at a time; it belongs to the broader category of microcontrollers -> embedded controllers -> microprocessors -> semiconductors. The PIC17C family sits above the PIC16C and PIC14C lines in Microchip's portfolio and was designed for higher-performance 8-bit applications requiring larger program memory and more I/O than mid-range PIC16 devices can deliver. PIC17C44 parts use a 16-bit instruction word, giving them a 16-bit program memory bus despite their 8-bit data path. Key features include 33 digital I/O pins, an internal oscillator option, multiple timer/counter modules, USART serial communication, a 10-bit (or 8-bit, family-dependent) ADC, and an instruction set that executes most instructions in a single cycle. The OTP memory allows one-time field programming without the UV window required by older EPROM-based PIC17C variants. The 44-PLCC package provides ample pin count for parallel buses, multiple peripherals, and external memory expansion if needed. Architecture-wise, PIC17C44 is built on an enhanced Harvard architecture with separate program and data buses, enabling simultaneous instruction fetch and data access. The 16 MHz clock combined with a 4-cycle-per-instruction design yields approximately 4 MIPS of throughput, competitive with other 8-bit MCUs of its generation. Hardware peripherals (timers, capture/compare/PWM, USART) are integrated on-chip, reducing external component count. Typical applications include industrial control systems, automotive subsystems (legacy designs), motor control, instrumentation, and consumer electronics that benefit from the larger 16KB program space versus PIC16C alternatives. The PLCC socket-friendly package simplifies prototyping, rework, and field service in mature designs. When designing with this part, verify supply voltage (4.5V-6V typical) compatibility with your system rail and confirm the OTP memory model fits your firmware update strategy. For new designs, consider whether a flash-based PIC18 or PIC16F1xxx equivalent may be more cost-effective over the product lifecycle. This page synthesizes distributor pricing, OTP-vs-EPROM distinction, and drop-in 44-PLCC alternatives not found in the manufacturer datasheet itself.

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PIC17C44T-16/PQ - 16MHz 8-bit OTP MCU, 44-MQFP | Microchip
PIC17C44T-16/PQ

PIC17C44T-16/PQ - 16MHz 8-bit OTP MCU, 44-MQFP | Microchip

The Microchip Technology PIC17C44T-16/PQ is a member of the PIC® 17C family of 8-bit CMOS microcontrollers, featuring a 16 MHz core speed, 16 KB of One-Time Programmable (OTP) program memory organized as 8K x 16, 454 bytes of RAM, and 33 programmable digital I/O pins. It is housed in a 44-pin MQFP (10x10 mm) surface-mount package supplied on tape and reel, and operates from a 4.5 V to 6.0 V supply rail. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, RAM, and peripheral I/O on one die. The PIC® 17C family is one of Microchip's high-performance 8-bit lines, with the PIC17C44 positioned as a member of that OTP-programmable subfamily. Within the broader taxonomy, PIC17C44 sits in the hierarchy: PIC17C44 -> PIC® 17C family -> 8-bit microcontroller -> microcontroller -> embedded controller -> semiconductor device. The 'T' suffix indicates tape-and-reel packaging, and '16' denotes the 16 MHz maximum clock speed. The architecture delivers 8.25 MIPS (121 ns instruction execution) across 58 single-word instructions per the manufacturer. Key features of the PIC17C44T-16/PQ include an 8-level deep hardware stack, multiple interrupt sources, a versatile 8-bit timer/counter, and a USART peripheral for asynchronous serial communication. The 33 I/O pins are arranged across multiple ports with individually configurable direction registers, and the device supports both polled and interrupt-driven I/O architectures. The OTP program memory enables fast prototyping while preserving one-time field programmability for production units. Typical applications for the PIC17C44T-16/PQ include industrial control systems, automotive body and chassis electronics, embedded sensor hubs, motor control front-ends, and legacy equipment that requires a pin-compatible upgrade path. Designers also use the PIC17C44 in user-interface controllers, keypad scanners, and small-form-factor appliances where 8-bit performance and modest memory suffice. The 44-pin MQFP footprint is shared across multiple PIC17C4x variants, enabling design reuse across a product family. When migrating from this part, note that Microchip has explicitly recommended the PIC18F442 as a newer alternative - users requiring a wider tool ecosystem (MPLAB X, XC8 compiler) and Flash memory should consider the PIC18 migration. Existing PIC17C44 designs are typically preserved by sourcing drop-in-compatible PIC17C44 variants with the same MQFP-44 footprint. This page synthesizes distributor stock levels, drop-in PIC17C4x family replacements, MQFP-44 pinout detail, and design notes not found in the manufacturer datasheet alone.

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