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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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PIC17C44T-16/PT - 16MHz 8-Bit OTP MCU, 16KB, 44-TQFP | Microchip
PIC17C44T-16/PT

PIC17C44T-16/PT - 16MHz 8-Bit OTP MCU, 16KB, 44-TQFP | Microchip

The Microchip Technology PIC17C44T-16/PT is an 8-bit RISC microcontroller in the PIC17C family, delivering 8.25 MIPS of performance at 16 MHz from a 5V (4.5V-6V) supply, housed in a 44-pin TQFP (10x10 mm) surface-mount package with 16 KB of One-Time-Programmable (OTP) program memory and 454 bytes of data RAM across 33 I/O pins. The "T" suffix indicates Tape & Reel packaging and the "16" suffix denotes the 16 MHz maximum clock speed. An 8-bit PIC microcontroller (MCU) is a small, low-cost computer-on-a-chip built around the Peripheral Interface Controller (PIC) RISC architecture introduced by Microchip. PIC MCUs sit in the broader hierarchy of microcontrollers -> embedded processors -> semiconductor devices. The PIC17C family is the high-performance tier of the 8-bit PIC lineup, offering the largest program memory, the deepest interrupt structure, and the highest I/O count of the classic 8-bit PIC families, making it suitable for complex control tasks traditionally reserved for 16-bit parts. Key features include Harvard bus architecture with separate program and data memory paths, 16 KB (8K x 16) of OTP program memory, 454 bytes of general-purpose RAM, 33 digital I/O lines, on-chip peripherals including PWM, Watchdog Timer (WDT), Power-On Reset (POR), and a hardware UART/USART for asynchronous serial communication. The device executes 58 single-word instructions, all single-cycle except for program branches which take two cycles. The PIC17C44's CMOS process delivers low power consumption while sustaining 8.25 MIPS throughput (121 ns minimum instruction cycle). Its 16-level hardware stack and multi-source interrupt structure simplify firmware development for time-critical control loops, and the PIC17C line is fully upwards code-compatible with the PIC16C5X, PIC12CXXX, and PIC16CXX families - existing assembler investments are preserved when migrating. Typical applications include industrial process controllers, motor control front-ends, automotive body and chassis ECUs (pre-CAN era), HVAC control boards, point-of-sale terminals, security system panels, and embedded data-acquisition front-ends. The PIC17C44 is the original Microchip PIC microcontroller recommended for drop-in upgrades to PIC16C-series designs that have outgrown code space or I/O count. Designers should note that the PIC17C44 OTP windowless parts require a one-shot programming step during manufacturing; for field-reprogrammable designs, the PIC18F442 is the modern migration path (per Microchip's own product page). Operate the device within the 4.5V-6V supply envelope and derate I/O sink/source current when many pins switch simultaneously. This page synthesizes distributor pricing, drop-in alternatives from the PIC17C family, and practical design notes that complement the Microchip datasheet and PICmicro Mid-Range Reference Manual.

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PIC17C44T-16I/PT - 16MHz 8-Bit OTP MCU, 44-TQFP | Microchip
PIC17C44T-16I/PT

PIC17C44T-16I/PT - 16MHz 8-Bit OTP MCU, 44-TQFP | Microchip

The Microchip Technology PIC17C44T-16I/PT is a high-performance 8-bit CMOS EPROM/ROM-based PIC microcontroller from the PIC17C family, operating at 16 MHz with 16 KB (8K x 16) of One-Time-Programmable (OTP) program memory and 454 bytes of RAM, housed in a 44-pin TQFP (10x10 mm) industrial-temperature grade package. The "T" suffix in the part number indicates tape-and-reel packaging, and the "I" suffix indicates the industrial temperature range of -40C to +85C. It integrates 33 digital I/O lines, a 16-bit timer/counter, 8-bit PWM, hardware USART, POR (Power-On Reset) and a Watchdog Timer (WDT). What is a PIC17C microcontroller? The PIC17C is Microchip's high-end 8-bit PIC architecture, one tier above the PIC16C family, designed for applications that demand more code space, more peripherals and higher throughput than mid-range PIC devices can offer while preserving the classic 5V CMOS simplicity. The architecture executes one instruction per cycle and targets 8.25 MIPS (121 ns instruction cycle) at 33 MHz maximum clock. Within Microchip's taxonomy, PIC17C sits between PIC16C (mid-range 8-bit) and PIC18F (enhanced 8-bit with self-programming Flash). It is supplied by the legacy "Mature Product" portfolio and has been superseded for new designs by the Flash-based PIC18F442, but remains widely available in distribution channels for industrial maintenance and legacy equipment. Key features include 16 KB OTP program memory (one-time programmable - once written, the code is permanent and cannot be erased), 454 bytes of general-purpose SRAM, 33 I/O pins spread across multiple ports, a hardware USART for asynchronous/synchronous serial communication, an 8-bit PWM channel with programmable period and duty cycle, a 16-bit timer/counter, dual clock sources with selectable oscillator modes (RC, XT, HS, LP), a Watchdog Timer with its own on-chip RC oscillator for reliable operation, Power-On Reset and Brown-Out Reset, and a wide 4.5V-5.5V supply range. The TQFP-44 industrial temperature grade suits harsh factory-floor and outdoor embedded deployments. From an architectural standpoint, the PIC17C44 uses a 16-bit instruction word (vs. 14-bit in PIC16C) which yields 8K x 16 instructions of code space and supports immediate data up to 16 bits, indirect addressing with FSR registers, and a hardware multiply assist path. The OTP memory is single-write per bit cell, providing ROM-like permanence with prototype-grade programming flexibility. The 33 I/O pins are distributed as PORTA (8 bits), PORTB (8 bits), PORTC (8 bits) and PORTD upper bits, supporting TTL/CMOS levels at 5V with source/sink capability of 20 mA per pin. Typical applications include industrial automation controllers, motor control boards (the 8-bit PWM and 16-bit timer support closed-loop DC and stepper drives), HVAC thermostat and sensor interfaces, automotive aftermarket modules, point-of-sale terminals, legacy embedded data-acquisition front-ends, and intelligent sensor hubs. The wide 5V supply tolerance and industrial temperature rating make the PIC17C44 a practical choice for retrofitting older 5V-only industrial boards. When designing with this device, mind the OTP program-memory constraint: code cannot be erased or rewritten, so OTP parts are typically used for production builds after code is frozen on a prototype Flash equivalent. Designers should prototype on the PIC17C44 JW (windowed EPROM) variant and validate firmware thoroughly before committing to OTP production. Verify supply voltage stays inside the 4.5V-5.5V window, keep Vpp decoupling within 1 cm of the IC, and observe the 20 mA per-pin I/O limit when driving relays or LEDs directly. This page synthesizes distributor pricing, drop-in Microchip-family alternatives and practical design notes that are not aggregated on any single manufacturer or distributor page.

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PIC17C44T-25/PQ - 25MHz 8-Bit CMOS OTP MCU, 44-MQFP | Microchip
PIC17C44T-25/PQ

PIC17C44T-25/PQ - 25MHz 8-Bit CMOS OTP MCU, 44-MQFP | Microchip

The Microchip Technology PIC17C44T-25/PQ is a high-performance 8-bit CMOS EPROM/ROM microcontroller from the PIC17C family, delivering 25 MIPS (121 ns instruction execution) from a 25 MHz external clock in a 44-pin Metric Quad Flat Pack (MQFP, 10x10 mm) package. The device integrates 16 KB of OTP program memory organized as 8K x 16 words and 454 bytes of general-purpose RAM, with 33 digital I/O pins for peripheral interfacing. A microcontroller (MCU) is a single-chip computer that combines a CPU core, program memory, working RAM, and programmable I/O peripherals on one IC. The PIC17C family sits at the high end of Microchip's original 8-bit PIC hierarchy, offering RISC throughput, upwards compatibility with PIC16C5X/PIC12CXXX/PIC16CXX devices, and only 58 single-word instructions. PIC17C44 is the family's flagship part, later superseded by PIC18F442 per Microchip's product migration notice. Key specifications include a 25 MHz maximum operating frequency (8.25 MIPS sustained throughput), 16-bit-wide instruction word with Harvard architecture, 33 I/O ports, a hardware multiplier, and an 8-level deep hardware stack. The chip operates from a 4.5 V to 6.0 V supply and supports both commercial and industrial temperature grades depending on suffix. The 'T' suffix denotes tape-and-reel packaging; the /PQ suffix denotes the MQFP-44 surface-mount package. The PIC17C44's RISC pipeline and 16-bit-wide program path give it roughly 4x the throughput of legacy PIC16C5X parts at the same clock, making it suitable for real-time control loops, encoder/counter applications, and motor control. Hardware peripherals include a 16-bit timer/counter with capture/compare/PWM, a USART, and 8 channels of 10-bit (or 8-bit) analog-to-digital conversion on selected package variants. Typical applications include industrial automation controllers, motor drives, HVAC control boards, instrumentation front-ends, and legacy embedded designs ported from PIC16C5X/PIC16CXX firmware. The wide instruction set and C-compiler support (MPC, CCS, IAR) make it usable for mid-complexity state machines. Automotive-grade -40 C to +125 C variants exist with the /I suffix. When designing with this device, note that OTP memory requires one-time programming via a device programmer; if in-field firmware updates are required, migrate to a flash-based PIC18F or PIC16F equivalent. Decoupling: place 100 nF + 10 uF tantalum on VDD near the IC. MCLR must be pulled high through 10 kohm for normal operation, and the oscillator block needs the standard XT/LP/HS capacitor network documented in the datasheet. This page synthesizes distributor stock data, drop-in Microchip PIC17C family alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC17C44T-25/PT - 8-Bit 25MHz 16KB OTP MCU TQFP-44 | Microchip
PIC17C44T-25/PT

PIC17C44T-25/PT - 8-Bit 25MHz 16KB OTP MCU TQFP-44 | Microchip

The Microchip Technology PIC17C44T-25/PT is a high-performance 8-bit CMOS EPROM/ROM microcontroller from the PIC17C family, delivering 8.25 MIPS (121 ns instruction execution) at 25 MHz core speed in a 44-pin TQFP (10x10 mm) surface-mount 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 for embedded control applications. A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, data RAM, and peripheral set. Within the semiconductor taxonomy, MCUs belong to microcontrollers, then embedded processors, then logic ICs, then integrated circuits. The PIC17C family sits at the high-performance tier of Microchip's 8-bit portfolio, bridging toward PIC18 and dsPIC devices in instruction throughput while retaining 8-bit data paths. Key features include a RISC architecture with 58 single-word instructions, an external oscillator interface supporting HS, XT, LP and RC modes, a 16-bit timer/counter with capture/compare/PWM capability, an 8-bit timer/counter, hardware USART, watchdog timer, power-on reset (POR), and brown-out reset (BOR). The OTP memory supports in-circuit programming via Microchip's ICSP protocol, simplifying firmware development and field updates. The PIC17C44 architecture uses a 16-bit instruction word with Harvard bus separation between program and data memory, eliminating fetch bottlenecks. Each instruction cycle executes in 4 oscillator clocks, and the 25 MHz rating supports 121 ns instruction time. The device operates across 3.0 V to 5.5 V supply with commercial temperature grade (0C to +70C), drawing typically under 10 mA active. Typical applications include industrial control systems, motor control, HVAC equipment, instrumentation, automotive body controllers, and consumer appliance controllers. The PWM and USART peripherals simplify variable-frequency drive and communication tasks. When designing with this part, place a 0.1 uF decoupling capacitor within 5 mm of each VDD/VSS pair, and use ICSP connector access to all five programming pins (RB6, RB7, MCLR, VDD, VSS) to enable field re-flash even on production boards. This page synthesizes distributor pricing, drop-in PIC17C44 family alternatives, and practical design notes not found in the standalone datasheet.

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PIC17C44T-25E/PT - 8-Bit OTP MCU, 16KB, 25MHz, 44-TQFP | Microchip
PIC17C44T-25E/PT

PIC17C44T-25E/PT - 8-Bit OTP MCU, 16KB, 25MHz, 44-TQFP | Microchip

The Microchip Technology PIC17C44T-25E/PT is an 8-bit RISC CMOS EPROM/ROM microcontroller from the PIC17C family, offering 16KB of one-time-programmable (OTP) program memory, 454 bytes of RAM, and a 25 MHz maximum operating frequency in a 44-pin TQFP package supplied on tape-and-reel. The device delivers 8.25 MIPS (121 ns instruction execution) across 58 single-word instructions and is upwards compatible with PIC16C5X, PIC12CXXX, and PIC16CXX architectures. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (ROM/EPROM/Flash), data memory (RAM), and peripherals such as timers, PWM, ADC, and I/O ports onto one silicon die. Within the broader taxonomy, an MCU belongs to the family of microprocessors -> microcontrollers -> 8-bit microcontrollers -> embedded controllers. PIC17C44 specifically belongs to Microchip's high-performance PIC17 family, positioned between PIC16 mid-range parts and PIC18 enhanced parts, and was later superseded functionally by PIC18F442 per the manufacturer's current product page. Key differentiating features of the PIC17C44 include a Harvard-architecture RISC core, 33 digital I/O pins, an 8-bit timer/counter with PWM capability, an enhanced UART, multiple interrupt sources, power-on reset (POR), brown-out reset (BOR), watchdog timer (WDT), and an external oscillator interface supporting crystal, RC, and resonator modes. The 'E' suffix in the part number denotes the Extended industrial temperature grade of -40C to +125C, while the 'T' indicates tape-and-reel packaging. Architecturally, the PIC17C44 implements a 16-bit-wide instruction word with separate program and data buses, enabling single-cycle instruction fetch. The OTP EPROM cell array is windowless and one-time programmable; engineering samples use a ceramic windowed package for erasure during development. Brown-out detection and a low-voltage detector protect the part from code corruption during supply droop events. Typical applications include industrial control, motor drive PWM control loops, instrumentation, automotive subsystems, and legacy embedded systems requiring deterministic 8-bit execution. Engineers typically pair this MCU with external op-amps, RS-232/RS-485 transceivers, and EPROM/Flash memory in expanded bus modes. Design tip: in noisy industrial environments, place a 100 nF decoupling capacitor within 5 mm of each VDD/VSS pair and use a watchdog timeout longer than the longest expected blocking routine to avoid spurious resets.

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PIC17C44T-25I/L - 8-Bit 25MHz PIC17C MCU 16KB OTP 44-PLCC
PIC17C44T-25I/L

PIC17C44T-25I/L - 8-Bit 25MHz PIC17C MCU 16KB OTP 44-PLCC

The Microchip Technology PIC17C44T-25I/L is an 8-bit CMOS EPROM/ROM-based microcontroller belonging to the PIC17C family, delivering 25MHz (8.25 MIPS, 121ns instruction execution) performance with 16KB (8K x 16) of One-Time Programmable (OTP) program memory in a 44-pin PLCC (16.59x16.59 mm) package. It is part of the broader PIC17C series that bridges the gap between classic PIC16 mid-range microcontrollers and the more advanced PIC18 family. According to the manufacturer datasheet, the device features 454 bytes of RAM, 33 digital I/O pins, and operates from a 5V supply with an industrial temperature range of -40C to +85C. A microcontroller (MCU) is a single-chip computer containing a processor core, program memory, working RAM, and configurable peripherals. The PIC17C44 belongs to the PIC17C high-performance family which extended Microchip's 8-bit RISC architecture to 8.25 MIPS, doubling the throughput of earlier PIC16C5X/PIC16CXX devices while remaining upwards instruction-compatible with them. This generation sits in the hierarchy: microcontroller -> embedded controller -> 8-bit MCU -> PIC17C family -> PIC17C44 device. Key features include 16KB OTP program memory (8K x 16 words), 454 bytes of RAM, 8-bit data width, 25MHz maximum clock frequency, 58 single-word instruction set, 33 I/O pins, 2x 8-bit and 3x 16-bit timers, watchdog timer, brown-out reset, and parallel slave port. The OTP program memory is one-time programmable via EPROM technology, making the PIC17C44T-25I/L well-suited to low-volume production runs, prototyping, and educational designs where in-system re-programmability is not required. Technical depth: the PIC17C44 uses a RISC Harvard-architecture core with separate program and data buses, a 16-bit-wide program word, and a single-cycle instruction fetch. It is available with EPROM (windowed and OTP) and masked-ROM program memory options. The PLCC-44 J-lead surface-mount package provides a robust through-hole-replaceable footprint compatible with IC sockets, easing prototyping and field replacement. According to the manufacturer, the device draws approximately 25mA active at 25MHz. Typical applications include industrial automation control, motor control drivers, embedded instrumentation, building automation, security and alarm systems, automotive body controllers, and point-of-sale terminals. The PIC17C44T-25I/L is also widely used in legacy designs and OEM replacement where the original PIC17C44 was specified. The OTP memory suits applications that ship with fixed firmware and do not require firmware updates. When designing with this device, account for the OTP memory limitation - firmware bugs cannot be corrected in-circuit. For new designs where in-system re-programmability matters, consider PIC18F or PIC16F flash-based alternatives. The 44-PLCC package allows socketed prototyping; an Aries 44-pin PLCC socket or equivalent is recommended for development cycles. This page synthesizes distributor pricing, drop-in PIC17C family alternatives, and practical design notes not found in the standalone manufacturer datasheet.

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PIC17C44T-25I/PQ - 8-bit 25MHz OTP MCU 16KB | Microchip
PIC17C44T-25I/PQ

PIC17C44T-25I/PQ - 8-bit 25MHz OTP MCU 16KB | Microchip

The Microchip Technology PIC17C44T-25I/PQ is a high-performance 8-bit CMOS EPROM/ROM microcontroller from the PIC17C family, delivering 8.25 MIPS performance with a 121 ns instruction cycle, 16 KB of OTP program memory (8K x 16), 454 bytes of RAM, and 33 I/O pins in a 44-pin MQFP (10x10 mm) package. An OTP (One-Time Programmable) microcontroller is a programmable device whose on-chip program memory is a one-time-writable EPROM cell - the device can be programmed once by the user before being sealed, after which the program is permanent. The PIC17C family sits above the PIC16C in the Microchip 8-bit hierarchy (PIC10F -> PIC12F -> PIC16F -> PIC17C -> PIC18F), offering higher throughput and expanded peripheral integration for cost-sensitive embedded applications that need more MIPS than a PIC16C but less complexity than a 16-bit dsPIC. Key features include 58 single-word instructions, a single-cycle instruction execution architecture (121 ns at 25 MHz oscillator), an operating voltage of 5V, 33 digital I/O lines, and a 25 MHz maximum clock input with up to 33 MHz clock tolerance. The device supports up to 16 KB of EPROM program memory with 454 x 8 bytes of data RAM, and the 44-pin MQFP (PQ) package provides generous I/O count and a compact surface-mount footprint for industrial-grade (-40C to +85C) operation. Architecturally, the PIC17C44 uses Microchip's RISC-based PIC core with a 16-bit instruction word and 8-bit data path, an internal 16-level hardware stack for fast subroutine calls, and a Harvard bus structure that separates program and data fetches to enable single-cycle instruction throughput. Industrial-temperature screening (the "I" suffix) and the EPROM-based OTP cell make this part well suited to legacy embedded control designs that need one-time-coded firmware and long-life supply continuity. Typical applications include industrial automation controllers, motor control front-ends, embedded instrumentation, legacy control board retrofits, and white-goods appliance control. The 33 I/O count supports keypad scanning, LED/LCD multiplexing, and direct drive of relays, solenoids, and small stepper motors. Engineers familiar with PIC16C migration paths often choose PIC17C44 because the instruction set is upward-compatible while offering roughly twice the throughput. When designing with this device, plan for an external 5V regulator, decoupling caps on VDD/AVDD pairs, and a programmer that supports EPROM OTP (e.g., MPLAB PM3). Note that the PIC17C44 is a mature EOL/EOL-near part - confirm long-term availability before committing to new designs, and consider the modern PIC18F442 or PIC18F452 as pin-compatible successors. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC17C44T-25I/PT - 8-Bit 25MHz 16KB OTP MCU 44-TQFP | Microchip
PIC17C44T-25I/PT

PIC17C44T-25I/PT - 8-Bit 25MHz 16KB OTP MCU 44-TQFP | Microchip

The Microchip Technology PIC17C44T-25I/PT is a high-performance 8-bit CMOS EPROM/ROM microcontroller from the PIC17C family operating at 25 MHz, with 16 KB of OTP program memory organized as 8K x 16 words and 454 bytes of RAM, housed in a 44-pin TQFP (10x10 mm) industrial-temperature-grade package. It belongs to the RISC architecture microcontrollers from Microchip, offering 33 digital I/O pins and one-time-programmable (OTP) EPROM program memory suited to production runs with stable firmware. What is an 8-bit microcontroller? An 8-bit microcontroller is a single-chip computer that processes data in 8-bit chunks using a CPU, program memory, data RAM, and integrated peripherals. The PIC17C44T sits in the PIC17C high-end 8-bit family - historically Microchip's fastest 8-bit OTP line, positioned between the standard PIC16 and later PIC18 architectures. In the broader taxonomy: microcontroller -> 8-bit MCU -> RISC MCU -> embedded controller -> semiconductor. It is intended for industrial-grade embedded designs where deterministic instruction execution and integrated peripherals reduce external component count. Key features of the PIC17C44T-25I/PT include 16 KB (8K x 16) EPROM program memory, 454 bytes of data RAM, 33 I/O pins, and a 25 MHz maximum clock speed driving a RISC instruction set. The TQFP-44 (10x10 mm) surface-mount package supports industrial operating temperatures per the "I" suffix. The part supports OTP one-time-programmable memory useful for production volumes where code is final and frequent field updates are not required. "T" in the part number denotes tape-and-reel packaging per Microchip ordering nomenclature. At the architectural level, the PIC17C44 family is built on a Harvard-architecture RISC core, separating program and data buses for parallel instruction fetch and operand access. The RISC instruction set aims to execute most instructions in a single instruction cycle, supporting deterministic interrupt response and predictable timing. The on-chip EPROM allows factory or prototype programming, while the integrated oscillator, timer, and interrupt controller reduce external glue logic. Typical applications include industrial process controllers, motor drive sequencers, instrument front-panel controllers, factory automation front-ends, and prototype / low-volume production appliances where an 8-bit RISC MCU provides sufficient control with minimal board area. Designers typically pair the PIC17C44T with sensors, optocouplers, power-driver ICs, and character or graphical LCDs. When designing with this part, note that PIC17C44 is a mature, NRND/EOL family - confirm long-term supply and the latest Microchip product-change notifications before specifying it for new production. Plan firmware in a compatible C or assembly toolchain and verify that the I/O count and peripheral mix match system requirements. Use decoupling capacitors per Microchip's recommended layout and place the EPROM-programmed reset circuit close to the MCLR pin for clean brown-out behavior. This page consolidates distributor pricing from Mouser and DigiKey, plus drop-in and same-family alternatives from Microchip, into a single technical reference that complements the official datasheet with cross-validated package, lifecycle, and parametric data.

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PIC17C44T-33/L - 8-Bit 33MHz PIC17C MCU 16KB OTP 44-PLCC | Microchip
PIC17C44T-33/L

PIC17C44T-33/L - 8-Bit 33MHz PIC17C MCU 16KB OTP 44-PLCC | Microchip

The Microchip Technology PIC17C44T-33/L is a high-performance 8-bit RISC microcontroller from the PIC17C family, featuring a 33 MHz maximum clock input and a 16 KB (8K x 16) One-Time Programmable (OTP) EPROM program memory in a 44-pin PLCC (J-lead) package measuring 16.59 x 16.59 mm. The device executes 58 single-word instructions, and all instructions complete in a single cycle (121 ns at 33 MHz) except program branches and table reads/writes which require two cycles, giving an effective 33 MIPS throughput. A microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/EPROM/Flash), data RAM, and programmable I/O peripherals onto one IC. The PIC17C family targets high-end 8-bit applications requiring more computational throughput than the PIC16 family and bridges toward the PIC18 generation. Architecturally, the PIC17C44 belongs to the Modified Harvard architecture family with separate program and data buses, which lets instructions be fetched in parallel with operand access, yielding predictable deterministic throughput essential for real-time control loops. OTP EPROM lets prototypes be programmed in volume with no windowed package cost. Key features include a 33 MHz maximum operating frequency, 16 KB on-chip OTP EPROM (organized 8K x 16 instruction words), 454 bytes of general-purpose RAM, 33 digital I/O lines, an internal 8-level hardware stack, and a programmable code-protection bit. Peripherals include three 8-bit timer/counters, a Universal Synchronous/Asynchronous Receiver/Transmitter (USART), a watchdog timer with its own on-chip RC oscillator, and a programmable brown-out reset. The die is fabricated on a low-power CMOS process, allowing operation from a single 4.5 V to 6.0 V supply and supporting commercial temperature grades. The 16-bit instruction width enables immediate operand encoding and direct register-memory operations that are awkward on 12-bit and 14-bit PIC cores, while preserving the PIC register-file programming model familiar to PIC16/PIC18 developers. Typical applications include industrial control and automation front-ends, automotive body and instrument modules, consumer appliance controllers, security and access-control panels, and embedded communication bridges where 33 MIPS of throughput and 33 I/O pins suffice. Designers often pair it with external EEPROM for parameter storage and an RS-232/RS-485 transceiver for serial connectivity via the integrated USART. When migrating firmware, the PIC17C44 source-level compatibility with PIC18 simplifies porting to modern Flash parts, but designers should note the OTP-only program memory means any post-production firmware update requires a board re-spin or a piggyback socket adapter. Decoupling must include a 100 nF ceramic and a 10 µF tantalum placed within 6 mm of VDD, with MCLR pulled high through a 10 kΩ resistor. This page synthesizes distributor stock data, parametric alternatives, and practical design notes that complement the Microchip datasheet, helping sourcing engineers make an informed decision on a long-running legacy MCU.

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PIC17C44T-33/PQ - 8-Bit 33MHz OTP MCU 16KB | Microchip
PIC17C44T-33/PQ

PIC17C44T-33/PQ - 8-Bit 33MHz OTP MCU 16KB | Microchip

The Microchip Technology PIC17C44T-33/PQ is an 8-bit RISC microcontroller from the legacy PIC17C family, featuring 16KB of One-Time Programmable (OTP) program memory, 454 bytes of RAM, and 33 digital I/O pins. Housed in a 44-pin MQFP (PQ) package, the part runs at a maximum clock speed of 33 MHz from a 5 V supply and integrates a Harvard-architecture CPU with separate program and data buses. The "T" suffix indicates tape-and-reel packaging, while "/PQ" denotes the 44-pin MQFP plastic gull-wing package. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data memory, and peripherals into one package. The PIC17C family sits in Microchip's high-performance 8-bit tier - above the baseline PIC16 line and below the PIC18 - and was the first PIC family to use a 16-bit program word with a 16-bit instruction set, increasing code density and execution speed for embedded applications. PIC17C44T-33/PQ belongs to the broader Microcontrollers > Integrated Circuits semiconductor category. Key features include the 33 MHz maximum operating frequency, 16KB OTP program memory (8K x 16 words), 454 bytes of data RAM, 33 I/O pins, and hardware multiply/divide support. The device also includes multiple timer modules, a USART serial port, and interrupt handling suitable for real-time embedded control. The OTP memory allows one-time programming for low-volume production and is typically used where firmware is finalized and EEPROM-style in-field updates are not required. Architecturally, the PIC17C44 uses a RISC instruction set with a two-stage pipeline, separate program and data buses (Harvard architecture), and an 8-bit data path with 16-bit instructions. This combination delivers approximately 121 ns instruction cycle time at 33 MHz. The chip is built on a CMOS process and supports both commercial and industrial temperature grades, depending on the part suffix. Typical applications include industrial automation controllers, motor control, embedded instrumentation, sensor signal conditioning, and legacy embedded designs originally specified on the PIC17C platform. Because the part is OTP rather than flash, it is best suited to high-volume, fixed-firmware applications where field reprogramming is not a requirement. When designing with the PIC17C44T-33/PQ, note that this device is part of the older PIC17C generation and has been superseded for most new designs by PIC18 and dsPIC families with flash memory. Verify current lifecycle status before new design-in. Provide a stable 5 V rail and proper decoupling close to the VDD pins. This page synthesizes distributor pricing, drop-in alternatives from the PIC17C and PIC16C families, and practical design notes that go beyond the manufacturer datasheet to help engineers source and qualify the PIC17C44T-33/PQ.

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PIC17C44T-33/PT - 33MHz 8-Bit OTP MCU 16KB | Microchip
PIC17C44T-33/PT

PIC17C44T-33/PT - 33MHz 8-Bit OTP MCU 16KB | Microchip

The Microchip Technology PIC17C44T-33/PT is a high-performance 8-bit CMOS EPROM/ROM microcontroller (MCU) belonging to the PIC17C family, featuring 16KB (8K x 16) of One-Time Programmable (OTP) program memory, 454 bytes of RAM, and 33 general-purpose I/O pins, all housed in a 44-pin TQFP (10x10 mm) surface-mount package. It operates from a 33 MHz external clock input that yields a 121 ns instruction cycle, providing up to 8.25 MIPS throughput from its RISC architecture. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (ROM/Flash/OTP), working RAM, and peripheral interfaces (I/O, timers, serial ports, ADC) into one package. The PIC17C family occupies Microchip's high-end 8-bit tier — above PIC16 and baseline PIC12/PIC14 — and uses a 16-bit instruction word with an 8-bit data path, which improves code density for arithmetic-heavy embedded control. The PIC17C44T-33/PT sits at the top of the family with maximum program memory and maximum clock speed. Key features include a 16-level hardware stack for fast interrupt servicing, 33 I/O pins with individual direction control, multiple timer/counter modules, a USART for serial communication, and 8 MIPS-sustained execution. The 'T' suffix denotes tape-and-reel packaging, and the '-33' denotes the 33 MHz maximum clock. The OTP EPROM memory allows one-time programming using a standard EPROM programmer, suitable for production runs where code stability is finalized. Typical applications include industrial control systems, motor control, automotive body electronics, security and alarm systems, and smart sensor interfaces where a deterministic 8-bit core with abundant I/O outperforms baseline PIC16 designs. Designers favor this family for interrupt-heavy, real-time control loops where the 16-bit instruction word and 121 ns cycle simplify timing budgets. When designing with this part, ensure the external clock source meets the 33 MHz maximum with proper rise/fall times and that decoupling capacitors (typically 0.1 µF ceramic per VDD pair) are placed close to the supply pins. The OTP memory cannot be erased, so development should use the PIC17C44 JW windowed version or migrate to the flash-based PIC18F442 recommended by Microchip as the modern replacement.

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