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PIC16LF877T-04I/PQ

PIC16LF877T-04I/PQ - 8-bit 4MHz MCU 14KB Flash 44-MQFP | Microchip

The Microchip Technology PIC16LF877T-04I/PQ is an 8-bit PIC16F-series RISC microcontroller operating at 4 MHz, with 14 KB of Flash program memory (8K x 14 words), 368 bytes of SRAM, and 256 bytes of EEPROM, housed in a 44-pin MQFP (10x10 mm, PQ package). It is the tape-and-reel, industrial temperature grade variant of the PIC16LF877 family, offering 33 digital I/O lines and a peripheral set including I2C, SPI, and UART/USART. An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path and integrated CPU, memory, and peripherals. PIC microcontrollers use a Harvard RISC architecture with separate program and data buses, enabling single-cycle instruction execution. The PIC16F family targets mid-range embedded applications (appliance control, industrial sensing, sensor hubs) and sits within the broader PIC mid-range hierarchy: 8-bit MCU -> PIC16 family -> PIC16F8xx sub-family -> PIC16LF877 device. The "LF" prefix denotes the low-voltage (2.0V-5.5V) variant suited to battery-powered and 3.3V designs. Key features include 14 KB of self-programmable Flash, 8-channel 10-bit ADC, two analog comparators, a 16-bit capture/compare/PWM module, two 8-bit timers, and a watchdog timer with its own on-chip RC oscillator. The wide operating voltage range of 2.0V to 5.5V makes the device compatible with both 3.3V and 5V rails, while the industrial -40C to +85C temperature range supports outdoor, automotive cabin, and factory-floor deployments. Architecturally, the PIC16LF877T-04I/PQ is built on Microchip's enhanced mid-range core with a 14-bit instruction word and 8-level deep hardware stack. In-system programming via ICSP allows firmware updates after PCB assembly. The 4 MHz rating refers to the maximum oscillator frequency at 5V; at lower VDD the device is typically clocked at lower frequencies to stay within the parametric envelope. Typical applications include industrial sensor interfaces, motor-control front ends, HVAC thermostats, battery-powered data loggers, and legacy embedded control boards. The rich peripheral mix supports mixed-signal designs where the MCU performs ADC acquisition, PWM drive, and serial communication in a single chip. Designers should pair the MCU with a decoupling network of 100 nF + 10 uF near VDD, route MCLR with a proper reset circuit, and verify the oscillator configuration bits against the chosen crystal. The 04 speed grade limits the oscillator to 4 MHz, ensuring parametric margin across voltage and temperature. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16LF87T-I/SS

PIC16LF87T-I/SS - 8-bit 10MHz MCU 7KB Flash 16 I/O SSOP-20 | Microchip

The Microchip Technology PIC16LF87T-I/SS is a low-power 8-bit PIC microcontroller built on the PIC16 enhanced mid-range core with NanoWatt technology, offering 10 MHz operation and 7 KB of Flash program memory in a 20-pin SSOP package. It integrates 368 bytes of RAM, 256 bytes of EEPROM, 16 digital I/O pins, and three timer modules (Timer0/1/2) with Capture/Compare/PWM, a 10-bit ADC with up to 8 channels, and a full-duplex USART/SCI plus I2C and SPI interfaces. The 'LF' suffix indicates a wide 2.0 V–5.5 V operating range designed for battery-powered systems, while the 'T' denotes tape-and-reel packaging for high-volume assembly. A microcontroller (MCU) is a single-chip computer containing a CPU, non-volatile program memory (Flash), volatile working memory (RAM), and configurable peripheral blocks. The PIC16 family sits in Microchip's mid-range 8-bit portfolio, sitting between baseline PIC10/PIC12 devices and high-pin-count PIC18 parts, and is widely used in commercial and industrial embedded designs where deterministic instruction execution (200 ns per instruction at 20 MHz, 400 ns at 10 MHz) and a small footprint are critical. PIC MCUs ship in a hierarchical ecosystem (PIC10/PIC12/PIC16/PIC18) with NanoWatt variants that extend sleep-mode current well below 1 µA. Key features include a 14-bit instruction word, 35 single-word instructions, an internal 31 kHz–8 MHz oscillator with PLL options, two analog comparators, a watchdog timer, in-circuit serial programming (ICSP), and code protection. The 10-bit, 8-channel successive-approximation ADC delivers roughly 30 kSPS at 5 V, with selectable reference sources including an internal bandgap. Programmable weak pull-ups and interrupt-on-change on PORTB ease human-interface and keypad design, while the synchronous serial port supports both I2C master/slave and SPI master/slave protocols without external glue logic. The PIC16LF87T-I/SS is intended for low-power, peripheral-rich embedded applications where stable 8-bit performance matters more than raw MIPS. Its 2.0 V–5.5 V supply range, low sleep current, and integrated analog peripherals allow direct battery or USB-bus powered operation, and the 35-instruction RISC-like instruction set keeps firmware review, certification, and code-port tasks straightforward. Designers typically pair it with NanoWatt sleep modes, brown-out reset, and power-managed peripherals to extend battery life in field-deployed products. Typical applications include battery-powered sensor nodes, simple HMI panels with keypads and LCDs, low-speed USB/serial bridges, industrial control front ends, and consumer appliances such as white goods timers or remote controls. The wide operating voltage and integrated peripherals also suit handheld measurement instruments, security peripherals, and educational embedded platforms. Design consideration: when laying out the SSOP-20 footprint, keep the ICSP/ICD clock and data traces short and shield them from analog ADC inputs to prevent programming glitches during in-circuit debug, and place a 100 nF decoupling capacitor within 5 mm of VDD with a bulk 10 µF near the supply pin. This page synthesizes distributor pricing, same-brand drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single source for evaluation, sourcing, and selection decisions.

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PIC16LF88-I/ML

PIC16LF88-I/ML - 8-bit MCU, 7KB Flash, 368B RAM | Microchip

The Microchip Technology PIC16LF88-I/ML is a low-power 8-bit CMOS Flash microcontroller from the PIC16 mid-range family, delivering 7KB of program memory, 368 bytes of RAM and 256 bytes of EEPROM, in a 28-lead QFN package (ML suffix). It is built around a RISC architecture that executes most instructions in a single 200 ns cycle, providing up to 5 MIPS throughput when clocked at 20 MHz. The LF prefix denotes the extended low-voltage operating range from 2.0 V to 5.5 V, making the part suitable for battery-powered and energy-harvesting designs. An 8-bit microcontroller (MCU) is a small, self-contained computer-on-a-chip that integrates a CPU, non-volatile program memory, working RAM, peripheral set and I/O pins into a single package. PIC microcontrollers specifically use a Harvard RISC architecture with separate program and data buses, which is why a 14-bit wide program word can coexist with an 8-bit data path. Within the broader power management hierarchy, this part sits inside the Microcontrollers category, which is a sub-family of Integrated Circuits used in embedded control. The LF88 family is optimized for low-power applications via Microchip's nanoWatt technology, with multiple power-managed modes that drop current consumption into the nanoamp range when peripherals are gated off. Key features include 10-bit ADC with up to 7 channels, a 10-bit PWM module, two 8-bit timers plus one 16-bit timer, a USART with LIN support, an MSSP module for SPI/I2C, an internal 8 MHz oscillator (31 kHz to 8 MHz selectable), and 16 digital I/O pins with individual interrupt-on-change capability. The 28-QFN package with exposed pad supports extended industrial temperature operation from -40 C to +85 C (industrial grade marked by the I suffix). Internally the PIC16LF88 uses a 14-bit instruction word and an 8-level deep hardware stack. Its ADC can be clocked from a dedicated RC oscillator for noise-immune conversions, and the PWM module supports enhanced PWM modes with programmable dead-band control. The integrated synchronous serial port (MSSP) handles both I2C master/slave and SPI master/slave, while the AUSART provides RS-232 / RS-485 framing with a 9-bit address detect mode useful for multi-drop sensor networks. Typical applications include low-power sensor nodes, industrial control modules, battery-powered instrumentation, simple motor control and white-goods user interfaces. Its small QFN footprint and nanoWatt sleep modes also make it a common choice for handheld measurement devices. When designing with the PIC16LF88-I/ML, ensure that the exposed pad on the underside of the QFN is soldered to a sufficiently large copper pour for thermal dissipation and for the chip's ground reference. A 100 nF decoupling capacitor must be placed within 3 mm of the VDD pin, and the MCLR pin should be pulled high through a 10 kohm resistor unless an external reset supervisor is used. This page consolidates distributor pricing, verified same-brand and cross-brand drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet summary to help engineers select the right MCU variant.

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PIC16LF88-I/P

PIC16LF88-I/P - 8-Bit 10MHz 7KB Flash MCU 18-PDIP | Microchip

The Microchip Technology PIC16LF88-I/P is a low-power CMOS Flash-based 8-bit microcontroller in the PIC16 mid-range family, offering 10 MHz CPU performance, 7 KB (4K x 14) of Flash program memory, 368 bytes of SRAM, and 256 bytes of data EEPROM in a 18-pin PDIP through-hole package. The "LF" suffix indicates an extended low-voltage variant operating from 2.0 V to 5.5 V, while the "I" suffix specifies the industrial -40 C to +85 C temperature range and the "/P" suffix indicates the PDIP-18 package. What is a PIC16 microcontroller? The PIC16F family is a class of 8-bit RISC microcontrollers from Microchip Technology based on the Harvard architecture. PIC MCUs execute instructions in a single cycle (200 ns at 10 MHz) using a reduced instruction set of only 35 single-word instructions, which makes them deterministic, easy to program, and well suited for embedded control. PIC MCUs are categorized within the broader hierarchy: microcontroller -> 8-bit MCU -> RISC MCU -> embedded processor -> semiconductor. The PIC16LF88 sits in the enhanced mid-range sub-family with a 14-bit instruction word and 8-bit data path. Key features of the PIC16LF88 include nanoWatt Technology for power-managed sleep modes, a 10-channel 10-bit Analog-to-Digital Converter (ADC), two analog comparators, a USART module for serial communication, an MSSP module for SPI and I2C, a capture/compare/PWM (CCP) module, an enhanced CCP (ECCP) module, and 16 digital I/O pins with individual direction control. Internal oscillator options support operation without external crystals, and the device is in-circuit serial programmable (ICSP) for field firmware updates. The PIC16LF88 uses CMOS Flash technology with a 14-bit instruction word, 8-bit data bus, and a two-stage pipeline that overlaps fetch and execute to achieve single-cycle throughput for most instructions. The integrated nanoWatt power management provides multiple idle and sleep modes, a watchdog timer with on-chip RC oscillator, and a fail-safe clock monitor for industrial-grade reliability. The 256-byte data EEPROM allows non-volatile storage of calibration data, settings, and run-time parameters separate from the main Flash program memory. Typical applications include industrial sensor interfaces, low-power remote control units, battery-powered instrumentation, HVAC control nodes, small appliances with user interface, automotive body electronics subsystems (non-safety), home automation endpoints, and educational/hobbyist embedded platforms. The wide operating voltage and low-power nanoWatt modes also make it suitable for solar or energy-harvesting edge devices. Designers also use this MCU as an upgrade path from older PIC16C5X, PIC16C62xA, PIC16C7x, and PIC12CXXX designs because the PIC16LF88 maintains upward source-code compatibility. When designing with the PIC16LF88, ensure the Vdd decoupling capacitor (typically 0.1 uF ceramic) is placed within 5 mm of the Vdd pin, and that MCLR is pulled high through a 10 kohm resistor for normal operation. Program the configuration bits explicitly to select the desired oscillator source and watchdog behavior, because the ICSP programming tool cannot override configuration bit settings after they are written to the device. This page synthesizes distributor pricing, drop-in alternatives, application guidance, and design notes for the PIC16LF88-I/P that go beyond what the manufacturer datasheet alone provides, helping embedded engineers evaluate sourcing options and accelerate board bring-up.

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PIC16LF88-I/SO

PIC16LF88-I/SO - 8-bit 10MHz 7KB Flash MCU 18-SOIC | Microchip

The Microchip Technology PIC16LF88-I/SO is an 8-bit CMOS flash-based microcontroller in the PIC16 family, delivering 10 MIPS at a 10 MHz oscillator, packaged in an 18-pin Small Outline (SOIC) outline. The LF suffix denotes the low-voltage (F) variant qualified for industrial (-40C to +85C) operation with an extended VDD range of 2.0 V to 5.5 V, making it suitable for both 3.3 V and 5 V rails. The part integrates 7 KB of Flash program memory (4K x 14 words), 368 bytes of RAM, and 256 bytes of EEPROM data memory. A PIC16 microcontroller is an 8-bit RISC-based Harvard-architecture MCU from Microchip, belonging to the mid-range PIC16 family that sits between the baseline PIC10/12/16/17 families and the high-performance PIC18 family. PIC16F devices form one of the most broadly adopted 8-bit MCU families in industry and sit within the broader product hierarchy: 8-bit microcontroller -> RISC MCU -> embedded microcontroller -> semiconductor. They use a modified Harvard core with single-cycle instructions and are supported by a mature MPLAB X IDE toolchain plus MPLAB XC8 C compiler and PicKit/ICD programmers, with hundreds of free application notes and reference designs. Key features of the PIC16LF88 include an internal 8 MHz RC oscillator (calibrated to within 1 percent), a 10-bit ADC with up to 7 channels, two 8-bit timers plus one 16-bit timer, a USART with RS-485 support, an SSP module for SPI/I2C master-slave operation, nanoWatt technology for low-power Sleep (typically under 1 uA), and 16 bidirectional digital I/O pins multiplexed with peripheral functions. The device also includes a Capture/Compare/PWM (CCP) module plus an Enhanced CCP (ECCP) module, an analog comparator with programmable reference, and an ICD (In-Circuit Debugger) port. The device employs a 14-bit instruction word with 35 single-word instructions, most executing in a single instruction cycle (200 ns at 10 MHz). Its enhanced flash memory supports self-programming under firmware control, enabling bootloader designs and field-updateable products without external programmers. The wide 2.0-5.5 V supply range and nanoWatt power management make it suited to battery-powered sensor nodes that must sleep for long intervals between wake events. Typical applications include industrial sensor nodes, HVAC controllers, low-power remote battery telemetry, motor control signal conditioning, and consumer appliances. The wide VDD range lets a single part number span both 3.3 V sensor ASICs and 5 V legacy logic, reducing BOM complexity for multi-rail designs. When designing with the PIC16LF88, remember that the LF grade is specified for -40C to +85C, not -40C to +125C; for automotive AEC-Q100 or extended-temperature use, choose PIC16F88-I/SO (industrial) or migrate to the PIC16F1 enhanced mid-range family. Decoupling must follow Microchip's recommendation of a 0.1 uF ceramic capacitor placed within 5 mm of the VDD pin with a short trace to ground. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes that go beyond the manufacturer datasheet, including the canonical cross-reference to PIC16F88-I/SO and the LF-grade VDD limits.

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PIC16LF88T-I/ML

PIC16LF88T-I/ML - 8-bit MCU, 7KB Flash, 28-QFN | Microchip

The Microchip Technology PIC16LF88T-I/ML is a low-power 8-bit CMOS Flash microcontroller based on the PIC16 architecture, offering 7KB of program memory, 368 bytes of RAM, and 256 bytes of EEPROM in a 28-pin QFN (ML) package with industrial temperature grade (-40C to +85C). A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash/ROM), data memory (RAM), peripherals (ADC, timers, communication interfaces), and I/O on one die. PIC16-series MCUs sit in the 8-bit RISC tier of Microchip's PIC family, optimized for cost-sensitive, low-power embedded control tasks. Within the 8-bit category, PIC16 occupies the mid-range "F" family featuring 14-bit instruction words, hardware USART, and nanoWatt power management. Key features of the PIC16LF88 include 20 MHz maximum operating frequency (200 ns instruction cycle), 16 I/O pins, 7 channels of 10-bit ADC with selectable references, two 8-bit timers plus one 16-bit timer, an MSSP (I2C/SPI) module, an enhanced USART, a capture/compare/PWM (CCP) module, and nanoWatt Technology for low standby current. The device operates from 2.0 V to 5.5 V, suiting it to both 3.3 V and 5 V rails commonly found in industrial control loops. The PIC16LF88T-I/ML uses an 18-pin-pinout-compatible PIC16 enhanced core with hardware multiplier, a 35-instruction set for compact C/assembly code, and In-Circuit Serial Programming (ICSP) for in-system firmware updates. Its Flash memory supports >100,000 erase/write cycles and >40-year data retention, providing long-term field reliability. Typical applications include industrial sensor conditioning, low-power remote sensor nodes, white-goods and appliance control, automotive body and lighting subsystems (non-safety), HVAC peripherals, and consumer electronics with simple human-machine interfaces. Design with attention to decoupling: place 100 nF and 10 uF capacitors adjacent to VDD/AVDD and VSS pins. Configure unused I/O as outputs to minimize quiescent current, and leverage the nanoWatt sleep modes for battery-powered deployments. This page consolidates real distributor pricing, verified drop-in alternatives, and practical engineering notes to help engineers select, source, and integrate the PIC16LF88T-I/ML with confidence.

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PIC16LF88T-I/SS

PIC16LF88T-I/SS - 8-bit 10MHz 7KB Flash MCU | Microchip | SSOP-20

The Microchip Technology PIC16LF88T-I/SS is an 8-bit PIC16 microcontroller featuring 7KB (4K x 14 words) of Enhanced Flash program memory, 368 bytes of RAM, and 256 bytes of EEPROM data memory, executing instructions at up to 10MHz from an internal oscillator. It is housed in a 20-pin SSOP (5.30 mm) package with 16 digital I/O pins, a 10-bit ADC (7 channels), two 8-bit and one 16-bit timer/counter, a USART, an MSSP (SPI/I2C) module, and a nanoWatt Technology power management block. Operating voltage spans 2.0V to 5.5V across the industrial -40C to +85C temperature range, with self-programming capability and an ICD (In-Circuit Debugger) interface. Background: An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory (Flash), volatile data memory (RAM), non-volatile data memory (EEPROM), and configurable peripheral blocks. The PIC16F family sits in the mid-range tier of Microchip's PIC architecture, providing a balance of performance, peripheral integration, and low cost. It belongs to the broader taxonomy: MCU -> microcontroller -> embedded controller -> semiconductor. Most PIC16F devices incorporate nanoWatt Technology, which combines multiple low-power operating modes (Sleep, Idle, low-power Timer1) with on-chip peripherals that can wake the core asynchronously, enabling battery-friendly designs. Key features: 7KB flash with 100K erase/write cycle endurance; 10-bit, 7-channel ADC; nanoWatt power management including Run/Idle/Sleep modes and on-the-fly oscillator switching; synchronous/asynchronous serial (USART/SCI) and I2C/SPI (MSSP) interfaces; 16 I/O pins with individually programmable weak pull-ups, interrupt-on-change, and high-current sink/source; Capture/Compare/PWM (CCP) module; two analog comparators with programmable on-chip voltage reference; and Flash self-programming for field upgrades. Technical depth: The enhanced mid-range core uses a 14-bit instruction word with single-cycle execution (except branches), and the Harvard architecture separates program and data buses. The integrated 8 MHz internal oscillator is factory calibrated to +/-1% (typical), and the chip supports an external crystal/RC oscillator up to 20 MHz. The 16 I/O pins share a common 25 mA source/sink rating with individual 20 mA absolute maxima, allowing direct LED drive on any pin. Typical applications: Industrial control logic, sensor conditioning front-ends, low-power remote sensor nodes, white goods and HVAC interfaces, automotive body electronics subsystems (non-safety), and small appliances. Design consideration: The trailing 'T' suffix denotes Tape and Reel packaging; the 'I' is the industrial temperature grade; '/SS' specifies the SSOP-20 pin/package. Always verify the desired I/O count and ADC channels against your PCB layout when migrating to other PIC16F family members. This page synthesizes distributor pricing, drop-in alternative MPNs, and engineering design notes compiled from the official Microchip datasheet and live distributor listings, giving engineers a faster sourcing reference than the manufacturer site alone.

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PIC16LV54A-02/P

PIC16LV54A-02/P - 2MHz 8-Bit OTP MCU | Microchip 18-DIP

The Microchip PIC16LV54A-02/P is an EPROM/ROM-based 8-bit CMOS microcontroller belonging to the PIC® 16C5X family, featuring a 12-bit instruction word, an 8-bit data path, 768 bytes (512 x 12) of one-time-programmable (OTP) program memory, and a maximum clock speed of 2 MHz. Housed in an 18-pin DIP (0.300 inch, 7.62 mm) plastic through-hole package, this part supports a low-voltage operating range from 2.5 V to 5.5 V, making it the LV-variant for battery-friendly designs within the legacy PIC16C5X lineup. Twelve bidirectional I/O pins and a single 8-bit timer/counter (TMR0) address straightforward control tasks. What is an 8-bit OTP microcontroller? An 8-bit OTP MCU is a single-chip microcomputer whose internal program memory can be written exactly once by the user using a device programmer, after which the bit pattern is permanent. The OTP approach offers lower per-unit cost than windowed EPROM or flash, while preserving the flexibility of a programmable part. Within the broader semiconductor hierarchy, an OTP microcontroller sits under the categories: microcontroller -> embedded processor -> integrated circuit -> semiconductor. Key features of the PIC16LV54A-02/P include seven or eight special-function hardware registers, a two-level-deep hardware stack, and direct/indirect/relative addressing modes for both data and instructions. The architecture exposes a RISC-style instruction set with a fixed two-cycle fetch, contributing to deterministic interrupt-free execution. The CMOS implementation minimizes quiescent current relative to NMOS predecessors. Architecturally, the PIC16LV54A-02/P uses a Harvard-style bus with separate program and data paths. This separation prevents the fetches from colliding with data accesses and enables the instruction pipelining that yields the well-known PIC instruction-per-clock (effective) performance. The 12-bit instruction width is wider than the 8-bit data path, which is the classic PIC16C5X signature, allowing literal data and absolute addresses to embed inside a single word. Typical applications include low-cost appliance controllers, hobby and educational projects, battery-powered timer modules, simple sensor signal conditioners, replacement logic for discrete 74-series glue, and standalone state machines. The 2 MHz ceiling and 768-byte OTP ceiling mean this MCU targets small, deterministic, foreground-only tasks. A critical design consideration is the OTP nature of the memory: firmware revisions require a new part. Designers should finalize the code or migrate to a flash-based sibling such as PIC16F54-I/P for production with frequent firmware updates. This page synthesizes distributor pricing, drop-in alternatives within the PIC16C5X/PIC16F5X line, and design notes not found in the manufacturer datasheet, including a verified package-dimension reference.

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PIC16LV54A-02/SO

PIC16LV54A-02/SO - 8-bit MCU, 2MHz, 768B OTP, SOIC-18 | Microchip

The Microchip Technology PIC16LV54A-02/SO is an 8-bit RISC microcontroller from the PIC16C5X family, featuring 768 bytes of OTP program memory (512 x 12 organization), 25 bytes of RAM, and 12 I/O pins in a commercial-temperature-grade 18-pin SOIC package. It operates at a maximum clock speed of 2 MHz from a 2.0 V to 6.0 V supply, and is engineered for low-voltage, cost-sensitive embedded control applications. An 8-bit microcontroller (MCU) is a small, self-contained computer-on-a-chip that integrates a CPU, RAM, program memory, and peripherals on a single die. The PIC16C5X family uses a 12-bit wide instruction set with RISC architecture, delivering 2:1 code compression over competing 8-bit MCUs in the same price class, making it well suited for high-volume, memory-constrained designs. Within the broader taxonomy, PIC16LV54A sits in the hierarchy: microcontroller -> embedded MCU -> RISC MCU -> 8-bit MCU -> PIC16C5X -> PIC16LV5X (low-voltage OTP variant). Key features include a fixed-length, single-cycle instruction set, 12 bidirectional I/O pins, an 8-bit real-time clock/counter with 8-bit prescaler, watchdog timer with on-chip RC oscillator, power-on reset, and brown-out protection. The "LV" prefix denotes low-voltage operation, allowing battery-powered designs to run directly from a single lithium cell (3.6 V max) without additional regulation. The PIC16LV54A-02/SO uses a Harvard-architecture RISC core that executes instructions in a single instruction cycle, providing deterministic timing for interrupt-driven and polled control loops. Its 33 instruction set enables compact code generation, while the OTP (one-time programmable) memory supports production programming with per-unit firmware customization. Typical applications include consumer appliance controls, battery-powered sensor interfaces, simple motor control, LED driver controllers, and replacement of discrete logic in legacy designs. The wide 2.0 V to 6.0 V range supports both 3.3 V and 5 V rails, simplifying integration into mixed-voltage systems. When designing with this part, note that OTP memory cannot be re-programmed; use PIC16F54 or PIC16HV540 flash-based siblings during prototyping. The 18-pin SOIC footprint is also available in PDIP (P) and SSOP (SS) variants for layout flexibility.

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PIC16LV54A-02I/P

PIC16LV54A-02I/P - 2MHz 8-bit OTP MCU 18-PDIP | Microchip

The Microchip Technology PIC16LV54A-02I/P is an 8-bit RISC microcontroller from the PIC16C5X family with 768 bytes (512 x 12) of One-Time-Programmable (OTP) program memory, 25 bytes of RAM, and twelve I/O lines, operating at up to 2 MHz from a 2.0V to 3.6V low-voltage supply in a 18-pin PDIP (Through-Hole DIP) package. An 8-bit microcontroller (MCU) is a small computer-on-a-chip integrating a CPU, RAM, non-volatile program memory (ROM/Flash/OTP), and peripheral I/O on a single die. Within the embedded hierarchy, the PIC16LV54A belongs to the OTP-based, ROM-less baseline MCU category -> 8-bit microcontroller -> microcontroller -> embedded processor -> semiconductor IC. The 'LV' suffix denotes the low-voltage variant, enabling battery-powered and portable designs where 5V rails are unavailable. Key features include a 12-bit wide instruction word with 2:1 code compression over typical 8-bit CISC MCUs, a two-level deep hardware stack, and a single 8-bit timer/counter (TMR0) with an 8-bit prescaler. Direct, indirect, and relative addressing modes simplify assembly coding for compact applications. The seven or eight special-function hardware registers are mapped into the data memory, and the instruction set requires only 33 single-word instructions to learn. Industrial temperature grade (-40C to +85C) ensures reliable operation in factory and automotive-cabin environments. Technically, the PIC16LV54A uses Microchip's classic Harvard architecture with separate program and data buses, allowing instruction fetch and data access in a single clock cycle. The 2 MHz oscillator input (the '-02' speed suffix) yields a 2 MHz instruction rate at 4:1 division in standard mode, sufficing for slow-loop control, keypad scanning, and LED multiplexing tasks. The 'A' revision brings enhanced electrical characteristics and the 'I' suffix denotes industrial temperature range. The OTP program memory allows one-time programming via a device programmer, making this part ideal for low-to-medium volume production where mask-ROM NRE is not justified. Typical applications include low-cost consumer appliances, remote controls, toy electronics, sensor signal conditioning, simple motor and relay drivers, LED lighting controllers, and battery-powered timers. The wide operating voltage makes it suitable for 2x AA / single Li-ion cell systems where 3.3V is the native supply. When designing with the PIC16LV54A-02I/P, note that OTP parts cannot be reprogrammed in-circuit; firmware must be fully validated on a windowed PIC16CR54A or flash-based PIC16F54 equivalent before committing to OTP. The 18-pin PDIP through-hole footprint simplifies prototyping on breadboards and through-hole PCBs, but for SMT production migrate to the PIC16LV54A-02I/SO (SOIC-18) variant. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes beyond the manufacturer datasheet summary, including parametric proximity data for cross-brand 8-bit MCU equivalents.

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PIC16LV54A-02I/SO

PIC16LV54A-02I/SO - 8-bit MCU, 768B OTP, 2MHz, 18-SOIC | Microchip

The Microchip Technology PIC16LV54A-02I/SO is an EPROM/ROM-based 8-bit CMOS microcontroller belonging to the PIC16C5X family, delivering 2 MHz instruction execution from a 768-byte (512 × 12) OTP program memory and 25 bytes of data RAM, housed in an 18-pin SOIC (SO) package. It integrates 12 I/O pins, an 8-bit real-time clock/counter (TMR0), a two-level deep hardware stack, and a watchdog timer for reliable embedded control. The 'LV' designation indicates low-voltage operation supporting 2V to 3.8V supply, while the '02' suffix denotes 2 MHz maximum clock speed and the 'I' suffix specifies industrial temperature range (-40°C to +85°C). An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals on one silicon die. Within the broader taxonomy, the PIC16LV54A belongs to the 8-bit MCU class, which itself falls under microcontrollers, integrated circuits, and ultimately semiconductors. The PIC architecture uses a RISC-like instruction set with 12-bit wide opcodes and an 8-bit data path, achieving 2:1 code compression over typical 8-bit CISC competitors. Key features include 33 single-word instructions (industry-standard PIC instruction set), seven or eight special-function hardware registers, direct/indirect/relative addressing modes for both data and instructions, and low-power CMOS technology. The device consumes very low quiescent current in standby mode, making it suitable for battery-powered and energy-constrained applications. The 8-bit timer/counter TMR0 with a programmable prescaler supports timing, event counting, and simple PWM generation. Technically, the PIC16LV54A uses a Harvard architecture with separate program and data buses, enabling simultaneous instruction fetch and data access. The OTP (one-time programmable) memory supports field programming via standard Microchip development tools. Internal oscillator options and external clock input flexibility allow designers to trade off cost, accuracy, and power consumption. The two-level hardware stack limits call depth, which is typical for low-pin-count baseline PIC microcontrollers. Typical applications include battery-powered sensor interfaces, low-cost consumer electronics, appliance controllers, simple LED driving circuits, and industrial automation edge devices. Its 12 I/O pins, small footprint, and low-voltage operation also suit it for handheld instruments and wearable accessories where power efficiency and PCB area are critical. When designing with the PIC16LV54A-02I/SO, ensure VDD decoupling with 100 nF ceramic capacitors placed close to the supply pins. For OTP programming, leave the MCLR/VPP pin accessible on the PCB. Stack depth limitation requires careful coding - avoid nested subroutines beyond two levels. For new designs, consider the flash-based PIC16F54-I/SO as an alternative, which offers in-circuit reprogrammability in the same 18-SOIC footprint. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet. The cross-reference data is sourced from live distributor and cross-reference tools, providing verified parametric similarity for engineers evaluating second-source options.

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PIC16LV54A-02I/SS

PIC16LV54A-02I/SS - 8-bit 2MHz 768B OTP MCU | Microchip | SSOP-20

The Microchip Technology PIC16LV54A-02I/SS is an 8-bit RISC microcontroller from the PIC16C5x family operating at up to 2 MHz, housed in a 20-pin SSOP package and offering 768B (512 x 12) of one-time programmable (OTP) program memory. It is the low-voltage 'LV' variant of the PIC16C54A, supporting a 2.0V to 5.5V supply range with 12 I/O pins and 25 bytes of general-purpose RAM. The device targets cost-sensitive embedded control in industrial and automotive environments, with an industrial operating temperature range of -40C to +85C. What is an 8-bit OTP microcontroller? An OTP microcontroller is a single-chip computer with non-volatile program memory that can be written once and read many times, combining a CPU core, RAM, ROM/EPROM, and peripherals on one die. The PIC16C5x family uses a 12-bit-wide instruction set and an 8-bit data path, providing 2:1 code compression over typical 8-bit MCUs. These MCUs sit inside the broader microcontroller -> RISC -> embedded controller -> semiconductor taxonomy and are descendants of Harvard-architecture microcontrollers. Key features include a hardware two-level deep stack, direct/indirect/relative addressing modes, an 8-bit real-time clock/counter (TMR0), power-on reset, watchdog timer, and a programmable code-protect bit. The RISC instruction set executes one instruction per instruction cycle (typically four oscillator clocks at 2 MHz), enabling deterministic interrupt response. The device runs from a single supply rail and supports low-power operation suited to battery-backed or always-on control nodes. Architecture-wise the PIC16LV54A-02I uses a separate code and data space (Harvard architecture) with 12-bit opcodes, an ALU working on 8-bit data, and seven or eight Special Function Registers (SFRs) controlling I/O direction, timers, and reset. Compared to the original PIC16C54, the 'A' revision adds enhanced oscillator stability and the 'LV' (low-voltage) suffix extends operation down to 2.0 V, making it suitable for 2xAA battery or 3.3 V regulated systems. Typical applications include appliance controls, automotive sub-systems, low-cost sensor interfaces, IR remote transmitters, LED drivers, and battery-powered consumer products. It also fits industrial logic-replacement and small white-goods control boards. A common design tip: provide a decoupling capacitor of 0.1 uF close to VDD and use a 4 MHz ceramic resonator or crystal when higher-speed external timing is needed. This page synthesizes distributor pricing, drop-in PIC16C5x family alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16LV54AT-02I/SS

PIC16LV54AT-02I/SS - 0.75KB OTP 8-bit MCU, 2MHz, SSOP-18

The Microchip Technology PIC16LV54AT-02I/SS is an 8-bit EPROM/ROM-based CMOS microcontroller in the PIC16C5X family, delivering 0.75 KB (768 B) of one-time-programmable program memory, 25 bytes of RAM, and 12 I/O pins in a 20-pin SSOP package. The 'LV' suffix denotes a low-voltage variant operating from 3V to 5.5V, while the 'A' suffix marks the enhanced instruction set revision, and the 'T' suffix identifies tape-and-reel packaging. With a 2 MHz maximum clock and 12-bit-wide instructions feeding an 8-bit data path, the device targets cost-sensitive embedded control where ROM-equivalent code storage is acceptable. An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, integrating a CPU core, non-volatile program memory, working RAM, digital I/O, and peripheral blocks such as timers and interrupts on one die. PIC16C5X-family devices sit at the low end of the Microchip PIC hierarchy, between base-line 8-bit controllers and the mid-range PIC16F family, and are commonly classified as EPROM/ROM-based 8-bit CMOS microcontrollers within the broader semiconductor > integrated circuit > microcontroller > 8-bit MCU taxonomy. Key features of the PIC16LV54AT-02I/SS include seven (or eight, depending on variant) special-function hardware registers, a two-level hardware stack, direct/indirect/relative addressing for data and instructions, and an 8-bit real-time clock/counter (TMR0). The '02I' speed grade allows operation up to 2 MHz, and the 'I' industrial temperature range covers -40C to +85C. Power-saving SLEEP mode, a watchdog timer (WDT) with on-chip RC oscillator, and programmable code protection round out the feature set typical of this family. Architecturally, the PIC16LV54A uses a RISC core with 33 single-word/12-bit instructions, an 8-bit ALU, and Harvard memory separation between program (12-bit wide) and data (8-bit wide) buses. The two-level hardware stack limits subroutine nesting to two levels but reduces context-switch overhead, while the absence of interrupts and the small register file keep the silicon small and the cost low - explaining why this device competes on price rather than feature density. Typical applications include battery-powered sensor interfaces, low-speed consumer appliances, industrial timers and counters, replacement of discrete logic in 4-20 mA loops, simple motor-control PWM, remote controls, and any design where a handful of I/O and a few hundred bytes of OTP code suffice. Designers migrating from PIC16C54/CR58 silicon gain the low-voltage (3V) operation needed for portable lithium-cell applications. When designing with this device, allocate I/O pin 4 (MCLR) for an external reset pull-up (or use the internal weak pull-up where present), place a 0.1 uF decoupling capacitor close to VDD, and verify oscillator start-up time against the application's worst-case supply ramp. Because the program memory is one-time programmable, code must be fully debugged in equivalent EPROM (windowed) prototypes before committing to the OTP mask. This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving procurement and firmware engineers a single authoritative reference for sourcing and substituting the PIC16LV54AT-02I/SS.

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PIC17C42A-16/L

PIC17C42A-16/L - 8-Bit 16MHz 4KB OTP MCU 44-PLCC | Microchip

The Microchip Technology PIC17C42A-16/L is a high-performance 8-bit CMOS EPROM/ROM microcontroller built on the PIC17C architecture, delivering up to 16 MHz CPU clock and 4 KB (2K x 16) of One-Time-Programmable (OTP) program memory in a 44-pin PLCC (J-Lead) package. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, RAM, peripherals, and I/O on one silicon die. PIC microcontrollers from Microchip use a RISC-based Harvard architecture where separate program and data buses allow simultaneous instruction fetch and operand access. The PIC17C family sits above the PIC16C line in performance, offering higher MIPS, larger address spaces, and richer peripherals, while remaining code-compatible with the PIC16C5X, PIC12CXXX, and PIC16CXX instruction-set families. Key features of the PIC17C42A include 8.25 MIPS throughput (121 ns instruction cycle), 232 bytes of general-purpose RAM, 33 digital I/O lines, a hardware USART for serial communication, two 8-bit timers plus two 16-bit timers, and a programmable prescaler. The 16 MHz maximum oscillator yields 8.25 MIPS - among the fastest 8-bit PIC devices in production at its introduction. The OTP program memory supports in-circuit programming via Microchip's standard tools, while the EPROM-based die allows prototype reprogramming through a windowed package variant. Architecturally, the PIC17C42A uses a 16-bit-wide instruction word and an 8-bit data path, with a 64 KB linear program address space and 16-level hardware stack. The USART can operate in asynchronous, synchronous master, and synchronous slave modes, supporting standard baud rates up to 625 kbaud at 16 MHz. Brown-out reset, watchdog timer, and power-on reset are integrated. Typical applications include industrial control, instrumentation, motor control front-ends, sensor signal conditioning, embedded communication bridges, and legacy 8-bit upgrades where PIC16C code must scale up without re-architecting. The wide temperature grade (-40C to +85C commercial) also supports white goods and consumer electronics. When designing with this part, verify that your C compiler or assembler targets the PIC17C instruction set; not all PIC tools support PIC17. The 44-PLCC package is through-hole or socket-mountable, simplifying prototypes and field replacement. This page aggregates current distributor pricing, drop-in package-compatible variants, and practical design notes synthesized from Microchip's PIC17C4X datasheet family and the PIC17C42A Errata (DS30412C) - information not consolidated on any single distributor page.

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PIC17C42A-16/P

PIC17C42A-16/P - 8-Bit OTP MCU, 16MHz, 4KB, 40-PDIP | Microchip

The Microchip Technology PIC17C42A-16/P is an 8-bit high-performance CMOS EPROM/ROM microcontroller built on the PIC17C architecture and housed in a 40-pin PDIP (0.600", 15.24 mm) through-hole package. It runs at 16 MHz maximum clock input, executes instructions in 121 ns (8.25 MIPS), and integrates 4 KB of OTP program memory (2K x 16) plus 232 bytes of data RAM for embedded control tasks. What is a PIC microcontroller? A PIC microcontroller is a family of RISC-based microcontrollers from Microchip Technology that combine a CPU core, program memory, data RAM, peripherals, and I/O pins on a single CMOS die. PIC microcontrollers sit in the broader hierarchy of microcontroller -> embedded controller -> semiconductor IC, and the PIC17C sub-family specifically targets higher-performance 8-bit designs that need more code space, more I/O, and hardware features beyond what the PIC16C5X and PIC16CXX devices provide. Key features of the PIC17C42A-16/P include 33 digital I/O pins, 2 capture inputs, 2 PWM outputs, 2 x 8-bit plus 2 x 16-bit timers (4 timer modules total), a USART for serial communication, external memory addressing, and external oscillator support. The device is OTP (One-Time-Programmable) for code storage and operates across the standard industrial temperature range of -40C to +85C from a 5 V supply. Architecturally, the PIC17C42A uses a Harvard RISC core with only 58 single-word instructions, an 8-level hardware stack, and interrupt handling suited to demanding real-time control. Compared to the older PIC16C5X, it adds extended instructions, wider addressing, and richer peripherals while remaining source-compatible with the PIC16CXX family, allowing designers to upgrade performance without rewriting firmware from scratch. Typical applications include industrial control systems, motor drive front-ends, smart sensor nodes, embedded instrumentation, and white-goods appliance controllers. The combination of 33 I/O lines and 4 KB of code storage fits mid-range embedded products where deterministic real-time behavior matters. When designing with this part, plan for OTP programming: the program memory cannot be erased, so production code must be fully verified before blow. Use the matching windowed ceramic (JW) variant for prototype development, then move to the OTP "P" package for production builds. Microchip recommends migrating to the PIC18F4220 for new designs, but the PIC17C42A-16/P remains a supported legacy option.

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PIC17C42A-16E/L

PIC17C42A-16E/L - 8-Bit 16MHz OTP MCU, 4KB, 44-PLCC | Microchip

The Microchip Technology PIC17C42A-16E/L is a high-performance 8-bit CMOS microcontroller from the PIC17C family, featuring 4KB of One-Time Programmable (OTP) program memory organized as 2K x 16 words, 232 x 8 bytes of RAM, and 33 digital I/O pins, all housed in a 44-pin PLCC (Plastic Leaded Chip Carrier) package measuring 16.59 x 16.59 mm. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, RAM, and peripherals on one die. Within the broader taxonomy, the PIC17C42A belongs to the OTP microcontroller category, which is a subset of embedded microcontrollers, themselves a class of microprocessors and, ultimately, semiconductors. The "17C" family designation historically marked Microchip's first high-end 8-bit architecture, positioned between the baseline PIC16C family and the later PIC18 family, and is now considered a mature legacy line. Key features include a maximum operating frequency of 16 MHz delivering up to 8.25 MIPS (121 ns instruction cycle), 4 KB of OTP program memory, 232 bytes of general-purpose RAM, 33 I/O pins, and an external oscillator interface. The OTP memory allows one-time field programming via a standard device programmer, making the part suitable for low-volume production runs and prototype-to-production transitions where mask ROM economics do not apply. Architecturally, the PIC17C42A implements a RISC-like Harvard instruction set with only 58 single-word instructions, a 16-bit instruction word, and a 8-bit data path. This wide-instruction/narrow-data topology favors deterministic execution and compact code density for state-machine and control-loop firmware, which is why the family found adoption in motor control, instrumentation, and industrial embedded systems in the 1990s. Typical applications include industrial control panels, sensor signal conditioning, motor drive sequencers, and legacy embedded systems originally designed around the PIC17C architecture. The 33 I/O pins and 16 MHz throughput are sufficient for keypad scanning, LED/LCD multiplexing, UART-based communication, and basic PID control loops. When designing with this device, note that OTP memory cannot be re-programmed in-circuit. Engineers should plan firmware revisions carefully, or use a socketed PLCC footprint to allow swap-out during development. Microchip recommends considering the PIC18F4220 as a newer Flash-based alternative for new designs. This page synthesizes distributor stock status, parametric alternatives, and lifecycle guidance not consolidated on the manufacturer product page, giving sourcing engineers a faster triage path for legacy PIC17C42A-16E/L designs.

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PIC17C42A-16E/P

PIC17C42A-16E/P - 8-Bit OTP MCU, 4KB, 16MHz, 40-DIP | Microchip

The Microchip Technology PIC17C42A-16E/P is an 8-bit CMOS OTP-based microcontroller from the PIC17C family, delivering 8.25 MIPS (121 ns instruction execution) with 16 MHz clock speed in a 40-pin PDIP package. It integrates 4 KB (2K x 16) of program memory and 232 bytes of RAM, with 33 programmable digital I/O lines for peripheral expansion. An 8-bit microcontroller is a single-chip computer that combines a CPU, program memory, data memory, and peripherals on one die; the PIC17C family is Microchip's high-performance branch of the 8-bit portfolio, sitting above the PIC16C/PIC12C lines and below the PIC18C. OTP (One-Time Programmable) means the program memory can be written once and is non-volatile thereafter - ideal for low-cost production runs where firmware is finalized at assembly. Key features include 16 MHz maximum clock speed, 4 KB program memory, 232-byte RAM, hardware multiply, 8-level hardware stack, 33 I/O pins, and integrated peripherals: a USART, two PWM modules, a watchdog timer, and power-on reset. The device operates from 4.5 V to 6.0 V across the -40 C to +125 C extended temperature range, fitting industrial and consumer embedded roles. Architecture-wise, PIC17C42A uses a Harvard RISC core with a 16-bit instruction word and 8-bit data path. The 33 I/O pins share ports RB, RC, and RD; pinout compatibility with PIC16C5X/PIC12CXXX/PIC16CXX lets designers migrate firmware upward while keeping the existing PCB layout. Applications include industrial control, automotive subsystems, consumer electronics, and embedded control where 8-bit simplicity and OTP cost advantages matter. The PIC17C42A is a mature part; Microchip recommends PIC18F4220 for new designs. Drop-in alternatives exist within the same family (PIC17C42A-16/P, PIC17C42A-16E/L, PIC17C42A-16E/PQ) to cover packaging, speed, and temperature variants. When designing in this MCU, account for OTP (no firmware updates in-field), confirm supply is within 4.5-6.0 V, and reserve the MCLR pin for proper reset. This page consolidates distributor pricing, verified drop-in alternatives, and practical engineering notes not aggregated on any single manufacturer page.

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PIC17C42A-16E/PQ

PIC17C42A-16E/PQ - 16MHz 8-bit OTP MCU, 44-MQFP | Microchip

The Microchip Technology PIC17C42A-16E/PQ is a high-performance 8-bit CMOS OTP microcontroller from the PIC17C family, delivering 8.25 MIPS (121 ns instruction execution) through a 16 MHz external oscillator in a 44-pin MQFP (10x10) surface-mount package. It integrates 4KB (2K x 16) of One-Time-Programmable (OTP) program memory, 232 bytes of RAM, and 33 digital I/O pins, providing a powerful yet easy-to-program platform with only 58 single-word instructions. The 'E' suffix indicates an industrial-grade operating temperature range, while the PIC17C42A is one of Microchip's first PIC17-family parts offering 16-bit program word width and a Harvard architecture optimized for compute-intensive embedded control. A microcontroller is a single-chip computer that integrates a CPU, RAM, non-volatile program memory (ROM/Flash/OTP), and peripheral I/O into one package. Within the broader taxonomy of semiconductor devices, microcontrollers sit under microprocessors (which lack on-chip memory and peripherals) and above generic logic ICs in integration level. PIC microcontrollers (Peripheral Interface Controllers) use a modified Harvard architecture with separate program and data buses, enabling single-cycle instruction fetch and deterministic interrupt response favored in real-time control. The PIC17C42A, as a member of the discontinued PIC17C family, sits between the legacy PIC16C and the modern PIC18 in capability and is supported by Microchip's MPLAB IDE toolchain via legacy device support packages. Key features of the PIC17C42A-16E/PQ include four 8-bit I/O ports (PORTA-PORTD with 33 lines total), a 16-bit timer/counter (TMR0) with 8-bit prescaler, an 11-channel 8-bit ADC, two analog comparators, a Universal Synchronous/Asynchronous Receiver-Transmitter (USART), and a watchdog timer with on-chip RC oscillator for reliable operation. The device supports external, crystal, or RC oscillator modes, and provides a programmable code-protection bit to lock OTP contents against unauthorized read-back, valuable for embedded intellectual-property protection. Architecturally, the PIC17C42A uses an enhanced Harvard bus with a 16-bit instruction word and 8-bit data path, an 8-level deep hardware stack, and direct register-mapped I/O for deterministic cycle timing. The 16 MHz clock yields 121 ns instruction cycle and 8.25 MIPS throughput, with most instructions executing in a single cycle except for branches (2 cycles). The OTP EPROM cell supports in-circuit programming via the ICSP interface using RB6 (clock) and RB7 (data) pins, enabling field firmware updates on a one-time basis. Typical applications include industrial automation controllers, automotive body and accessory modules, motor control subsystems, and consumer-electronics appliances where deterministic real-time response is critical. The PIC17C42A is also used in legacy medical instrumentation, security alarm panels, and high-end remote-control products that were originally designed in the late 1990s and require form-fit-function replacement parts. Note that Microchip's product page recommends migrating to the PIC18F4220 for new designs, as the PIC17C42A is on a last-time-buy/EOL track. When designing with this part, ensure your supply rail stays within the 4.5V-6V range and that decoupling capacitors (0.1 uF ceramic) are placed adjacent to VDD/VSS pairs. The /MCLR reset pin must be pulled high through a 10k resistor and a 100 nF cap to ground for proper power-on-reset behavior. The 44-MQFP package has a 0.8 mm lead pitch, requiring precise reflow profile and aperture design for reliable production soldering. This page synthesizes distributor pricing, drop-in alternatives (PIC17C42A-16I/PQ, PIC17C42A-16/PQ, etc.), lifecycle status (last-time-buy), and practical design notes not found in the manufacturer datasheet.

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PIC17C42A-16I/L

PIC17C42A-16I/L - 8-bit 16MHz OTP MCU, 4KB | Microchip

The Microchip PIC17C42A-16I/L is a high-performance 8-bit CMOS OTP-based RISC microcontroller delivering 8.25 MIPS (121 ns instruction cycle) from a 33 MHz oscillator input, packaged in a 44-pin PLCC (J-lead, "L" suffix). It integrates 4 KB (2K × 16) of OTP program memory, 232 × 8 bytes of RAM, and 33 digital I/O pins, providing substantially more horsepower and I/O than baseline PIC16C5X/PIC12CXXX devices while remaining upward code-compatible. What is a microcontroller (MCU)? An MCU is a single-chip computer that integrates a CPU core, non-volatile program memory (ROM/EPROM/Flash/OTP), working RAM, and peripheral interfaces (GPIO, timers, UART, ADC, etc.) into one package. PIC17C4X parts sit in Microchip's "high-performance 8-bit" tier, between the mid-range PIC16 family and the 16-bit dsPIC/PIC24 families, and are part of the broader power-management-and-embedded-control semiconductor category. Key features include a RISC instruction set with only 58 single-word instructions (all single-cycle, 121 ns, except program branches and table reads/writes which are two-cycle), a 16-level hardware stack, a hardware multiply unit, two 8-bit timer/counters, and one 16-bit timer/counter with capture/compare. The 16I industrial-grade temperature range (-40 °C to +85 °C) and OTP program memory make it well suited for low-volume production runs and field-proven designs. The PIC17C42A uses a Harvard-architecture CPU with separate program and data buses, an 8-bit ALU with a hardware multiply (8 × 8 in one cycle), and a 16-bit-wide program word. The 121 ns instruction execution at 33 MHz oscillator allows deterministic interrupt response and tight control loops, distinguishing it from CISC 8-bit MCUs of the same vintage. Typical applications include industrial control subsystems, motor-control front-ends, instrumentation, smart sensors, automotive body/comfort ECUs (non-safety), and legacy embedded products ported from PIC16 designs that require more code space, more RAM, or more I/O. The 4 KB OTP and 232 B RAM are sized for moderate protocol stacks and state machines. When designing with this part, account for OTP (one-time-programmable) limitations: firmware must be fully verified before programming. Also note Microchip's recommendation that newer designs use the PIC18F4220 as the modern functional successor. The PLCC-44 socket footprint allows in-system programming with standard tools. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC17C42A-16I/P

PIC17C42A-16I/P - 8-Bit 16MHz OTP MCU, 40-PDIP | Microchip

The Microchip Technology PIC17C42A-16I/P is a high-performance 8-bit CMOS EPROM/ROM microcontroller running at 16 MHz instruction rate with 4 KB (2K x 16) of OTP program memory, 232 bytes of RAM, and 33 digital I/O pins, housed in a 40-pin PDIP through-hole package. Background: An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, RAM, peripherals, and I/O. PIC17C series microcontrollers use a RISC-based Harvard architecture with 58 single-word instructions, most executing in a single instruction cycle (121 ns at 16 MHz oscillator input). The 17C family sits above the baseline PIC16 in Microchip's portfolio, adding hardware multipliers, additional timers, USART, PWM, and capture modules for real-time control applications. Key features of the PIC17C42A-16I/P include 8.25 MIPS throughput, an external oscillator interface, three hardware timers, two capture inputs, two PWM outputs, a hardware USART, an 8x8 hardware multiplier, and a 16-level hardware stack. The OTP (One-Time-Programmable) memory enables pre-programmed code for prototyping and low-to-medium volume production runs. The 'I' suffix denotes industrial temperature grade (-40C to +85C). Architecturally, the PIC17C42A uses a 16-bit-wide instruction word with an 8-bit data path, providing 2K instruction words and 232 bytes of register-mapped RAM. Compared to PIC16C devices, the 17C core widens the program bus, adds indexed addressing with two address pointers, and integrates a hardware multiply unit. Typical applications include industrial control loops, motor drives, smart sensors, automotive subsystems, security panels, and embedded data-acquisition front-ends that need deterministic timing and a small footprint. Design consideration: When replacing or sourcing this part, note that Microchip has marked the PIC17C42A as legacy. For new designs, Microchip recommends the PIC18F family as a modern flash-based migration path. Designers should verify oscillator input drive strength and use a 100 nF decoupling capacitor on VDD placed within 5 mm of the package pins. This page synthesizes distributor pricing, drop-in PDIP alternatives within the PIC17C family, and practical design notes not found in the manufacturer datasheet alone.

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PIC17C42A-16I/PQ

PIC17C42A-16I/PQ - 8-bit 16MHz OTP MCU 4KB | Microchip 44-MQFP

The Microchip Technology PIC17C42A-16I/PQ is a high-performance 8-bit CMOS EPROM/ROM-based microcontroller from the PIC17C family, delivering 8.25 MIPS with a 121 ns single-cycle instruction execution time. The device integrates 4 KB of One-Time-Programmable (OTP) program memory organized as 2K x 16 words, 232 bytes of general-purpose RAM, and 33 digital I/O pins, all housed in a 44-pin Metric QFP (MQFP-44, 10x10 mm) package. It operates from a 16 MHz external clock input and is specified over the industrial -40C to +85C temperature range. What is an 8-bit OTP microcontroller? An 8-bit microcontroller (MCU) is a small computer-on-a-chip built around an 8-bit data path and RISC-style instruction set. OTP (One-Time-Programmable) memory allows the firmware to be written once and retained, which is widely used in cost-sensitive, high-volume embedded products. The PIC17C family sits above the baseline PIC16C5X/PIC12CXXX line in Microchip's taxonomy: 8-bit MCU -> CMOS MCU -> RISC MCU -> microcontroller -> embedded computing. The PIC17C42A adds multi-cycle hardware multiply support, an expanded instruction set, and a wider interrupt model compared with PIC16C devices. Key features include 58 single-word instructions, hardware multiplier, two-cycle program branches and table read/write operations, an external oscillator interface, brown-out and power-on reset, and a versatile 8-level hardware stack. The PIC17C42A architecture retains upward code compatibility with PIC16C5X, PIC12CXXX and PIC16CXX devices, simplifying migration from earlier 8-bit designs. Typical applications include industrial control, motor drive front-ends, automotive body modules, instrumentation, security and access control, and consumer white goods. The wide I/O count (33 pins) and external oscillator flexibility make it well-suited to legacy designs where long-term firmware stability and CMOS low power are required. A critical design note: Microchip's product page recommends migrating to PIC18F4220 for new designs because the PIC17C42A is in declining production. Engineers maintaining existing product lines should plan for the eventual obsolescence of the OTP PIC17C family.

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PIC17C42A-25/P

PIC17C42A-25/P - 8-Bit 25MHz OTP MCU 4KB | Microchip

The Microchip Technology PIC17C42A-25/P is a high-performance 8-bit CMOS EPROM/ROM microcontroller delivering 8.25 MIPS throughput (121 ns instruction cycle) at a 25 MHz maximum clock, packaged in a 40-pin PDIP through-hole format. It integrates 4 KB of One-Time-Programmable (OTP) program memory (organized as 2K x 16 wide words), 232 bytes of general-purpose RAM, and 33 digital I/O pins, giving designers a compact 8-bit core with substantial peripheral integration for legacy embedded designs. An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data-path CPU, on-chip program memory, RAM, and a rich set of peripherals such as timers, capture/compare/PWM, USART, and I/O ports. Within the broader taxonomy, the PIC17C42A belongs to the PIC architecture family > OTP-based 8-bit MCU > microcontroller > embedded processor > semiconductor. OTP EPROM program memory lets engineers program the part once, including late-stage firmware revisions, without needing a windowed or flash part; the trade-off is no field re-programmability. Key features include a 16-level hardware stack, 16-bit instruction word, 58 single-word instructions, multiply and divide hardware support, dual 8-bit timers plus 2 capture inputs, 2 PWM outputs, a USART for serial communication, and external memory addressing for code beyond 64 KB. The 25 MHz oscillator drives a 4-cycle instruction execution pipeline, giving deterministic interrupt and timing behavior that is well-suited to real-time control loops. Typical applications include industrial automation controllers, motor control and appliance front panels, HVAC and building-control subsystems, automotive body/comfort modules, legacy communication protocol bridges, and instrumentation requiring deterministic 8-bit behavior. Designers familiar with PIC16C5X and PIC12CXXX devices retain tool and instruction-set continuity, easing code portability from earlier 8-bit designs. When designing with this device, mind the OTP memory constraint, validate the 5V to 6V supply window on every revision, and budget adequate decoupling near VDD/VSS pins. For modern designs that require field updates, consider the PIC18F4220 migration path Microchip recommends; for new builds where re-programmability matters, prefer flash-based PIC18 from the outset. This page synthesizes distributor pricing, parametric drop-in alternatives, and practical thermal and decoupling design notes that go beyond the manufacturer datasheet baseline, helping procurement and engineering teams decide whether PIC17C42A-25/P fits their legacy or production design.

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PIC17C42A-25/PQ

PIC17C42A-25/PQ - 25MHz 8-bit OTP MCU, 4KB, 44-MQFP | Microchip

The Microchip Technology PIC17C42A-25/PQ is an 8-bit, 25MHz, OTP-programmable CMOS microcontroller in the PIC17C family, packaged in a 44-pin MQFP (10x10mm). It integrates 4KB (2K x 16) of OTP program memory, 232 bytes of RAM, and 33 digital I/O lines, and executes instructions at 8.25 MIPS (121 ns per instruction). The /PQ suffix denotes the 44-MQFP plastic gull-wing package suitable for surface-mount assembly. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral interfaces into one IC. The PIC17C family sits above the PIC16C/PIC12C in Microchip's 8-bit hierarchy and is upward-compatible with PIC16C5X, PIC12CXXX, and PIC16CXX devices. PIC17C42A extends the original PIC17C42 with architectural enhancements, providing 58 single-word instructions and a powerful RISC core aimed at high-throughput embedded control. Key specifications include a 25 MHz maximum operating frequency, 8-bit data width with 16-bit instruction word, 4KB OTP program memory, 232 bytes data RAM, 33 I/O pins, and commercial operating temperature grade. The device uses a Harvard architecture with separate code and data buses, plus dedicated peripherals including timers, capture/compare/PWM modules, USART, and an 8-channel 10-bit (typical) A/D converter — making it suitable for mixed analog/digital control tasks. Architecturally, PIC17C42A employs an enhanced 8-bit RISC pipeline with 16-bit instruction words and an 8-level deep hardware stack for fast context switching. The OTP program memory allows factory or production-line programming of a fixed code image, which is typical for cost-optimized mass production where firmware is stable. Brown-out reset, watchdog timer, power-on reset, and interrupt controller are integrated for robust embedded operation. Typical applications include industrial control panels, motor control, instrumentation, HVAC controllers, security and alarm systems, and embedded sensor interfaces. The wide peripheral set also suits small-form factor human-machine interface (HMI) boards. The -25 speed grade supports time-critical control loops requiring deterministic 121 ns instruction execution. When designing with this OTP device, remember that program memory is one-time programmable — firmware bugs cannot be patched in the field. Use a flash-based equivalent such as PIC18F4220 for prototypes, then port final code to the OTP PIC17C42A-25/PQ for production. Ensure in-circuit emulation or socket programming for development to avoid scrapping parts. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the standalone manufacturer datasheet, helping engineers make a faster sourcing decision for legacy and maintenance designs.

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PIC17C42A-25/PT

PIC17C42A-25/PT - 8-bit OTP MCU, 4KB, 33 I/O, 25MHz TQFP-44

The Microchip PIC17C42A-25/PT is an 8-bit high-performance CMOS EPROM/ROM-based microcontroller executing 58 single-word instructions at up to 8.25 MIPS (121 ns instruction cycle) and packaged in a 44-pin TQFP (PT) surface-mount form factor. Key headline parameters include 4KB (2K x 16) of OTP program memory, 232 x 8 bytes of RAM, 33 digital I/O pins, and a 25 MHz maximum external clock input. The /PT suffix denotes TQFP-44 tray packaging. A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (ROM/Flash/EPROM), data memory (RAM), and configurable peripherals. Microcontrollers belong to the broader family of embedded processors and sit beneath microprocessors in complexity, optimised for control-oriented tasks rather than general-purpose computing. The PIC17C42A belongs to the OTP-EPROM subfamily of Microchip's PIC architecture, which is one-time-programmable in-circuit and ideal for low-to-medium volume production. Key features of the PIC17C42A-25/PT include a Harvard architecture with separate program and data buses, an instruction set upwards-compatible with PIC16C5X, PIC12CXXX, and PIC16CXX devices, and a hardware multiplier. The device supports external oscillator mode with a maximum clock input of 33 MHz (33 MHz clock input yields 121 ns instruction cycle per the datasheet), 8-level deep hardware stack, and multiple interrupt sources. Operating voltage range is 3.0 V to 6.0 V. Technical depth: the PIC17C42A uses a 16-bit wide program memory bus, allowing each instruction to be fetched in a single cycle except for program branches and table reads/writes which are two-cycle. This wide-bus design is what enables the 121 ns instruction execution time at 33 MHz oscillator input. The 'A' silicon revision adds a hardware multiply and additional peripheral integration over the original PIC17C42 die, and Microchip's product page directs new designs to consider PIC18F4220. Typical applications include industrial control, motor control, automotive subsystems (non-safety-critical), embedded sensor hubs, and legacy system maintenance. The 33 I/O pins make it suitable for keypad scanning, LED matrix driving, and parallel sensor interfacing. Wide operating voltage supports both 3.3 V and 5 V rails. When designing with this device, ensure the external oscillator is selected per the datasheet HS/EC mode table and that decoupling (100 nF + 10 uF) is placed within 6 mm of the VDD pins. Because the PIC17C42A is OTP (one-time programmable), firmware must be verified in a windowed or flash-based equivalent before committing to production units. This page synthesises distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving engineers a one-stop procurement and engineering reference for the PIC17C42A-25/PT.

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PIC17C42A-16E/PQ - 16MHz 8-bit OTP MCU, 44-MQFP | Microchip

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PIC17C42A-25/P - 8-Bit 25MHz OTP MCU 4KB | Microchip

PIC17C42A-25/PQ - 25MHz 8-bit OTP MCU, 4KB, 44-MQFP | Microchip

PIC17C42A-25/PT - 8-bit OTP MCU, 4KB, 33 I/O, 25MHz TQFP-44