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PIC16LC57CT-04I/SO - 8-Bit 4MHz OTP MCU 3KB 28-SOIC | Microchip
PIC16LC57CT-04I/SO

PIC16LC57CT-04I/SO - 8-Bit 4MHz OTP MCU 3KB 28-SOIC | Microchip

The Microchip Technology PIC16LC57CT-04I/SO is an 8-bit RISC microcontroller from the PIC16C5X family, featuring 3KB (2K x 12) of One-Time Programmable (OTP) program memory, 72 x 8 bytes of RAM, and a maximum clock speed of 4 MHz, all housed in a 28-pin SOIC wide-body package. The device operates across an industrial temperature range of -40C to +85C and is supplied in tape-and-reel packaging for surface-mount production lines. A PIC microcontroller is a low-cost, high-performance 8-bit fully-static CMOS MCU based on a RISC architecture, sitting in the broader taxonomy of microcontroller -> embedded processor -> semiconductor IC. The PIC16C5X family uses 12-bit wide instructions that are highly symmetrical, yielding roughly 2:1 code compression versus competitive 8-bit MCUs in the same price tier, while the simplified instruction set reduces development time. The PIC16LC57CT-04I/SO uses an EPROM/OTP process and is part of the low-power LC variant of the PIC16C57 lineage. Key features include a 33-instruction set, 12-bit instruction word, two 8-bit I/O ports, a watchdog timer, an 8-bit real-time counter with 8-bit prescaler, and on-chip power-on reset. The wide-body 28-SOIC (0.295-inch / 7.50mm) package gives a robust land pattern suitable for hand-rework and production-friendly assembly, while the industrial -40C to +85C temperature range supports factory-floor and outdoor installations. Architecturally, the device separates program memory (12-bit wide OTP EPROM) from data memory (8-bit wide static RAM), which simplifies firmware development and field programming. The 4 MHz maximum oscillator frequency yields a 1 microsecond instruction cycle, sufficient for simple control loops, user-interface scan routines, and low-speed sensor polling. The CMOS design reduces quiescent current compared with NMOS predecessors and supports battery-backed applications when paired with a sleep oscillator. Typical applications include appliance control boards, HVAC zone controllers, low-end consumer remote controls, industrial timers, vending-machine logic boards, and simple LED display drivers. The 3KB OTP memory budget accommodates state-machine firmware with look-up tables but is too small for protocol stacks such as TCP/IP or USB, so designers typically choose PIC16LC57CT-04I/SO for deterministic, loop-based control tasks rather than connected-edge applications. When designing with this part, verify that your firmware will fit within 2K x 12 words of OTP and that you have a programming strategy (gang programmer or ICSP) ready before committing to PCB layout. Note that OTP parts cannot be reprogrammed in-circuit once sealed by the package; use the PIC16F57 equivalent (Flash) if in-system firmware updates are required. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16LC57CT-04I/SS - 4MHz 8-Bit OTP MCU 28-SSOP | Microchip
PIC16LC57CT-04I/SS

PIC16LC57CT-04I/SS - 4MHz 8-Bit OTP MCU 28-SSOP | Microchip

The Microchip Technology PIC16LC57CT-04I/SS is a member of the PIC16C5X family of low-cost, high-performance, 8-bit, fully static, EPROM/ROM-based CMOS microcontrollers operating at 4 MHz in a 28-pin SSOP package. It integrates 3 KB (2K x 12) of One-Time Programmable (OTP) program memory, 72 bytes of data RAM, and 20 general-purpose I/O pins, supplied from a 4.5 V to 5.5 V rail. The device targets cost-sensitive embedded control applications that demand deterministic RISC execution with minimal external component count. An 8-bit microcontroller (MCU) is a single-chip computer that combines a CPU, program memory, data RAM, and peripheral set on one silicon die. The PIC16C5X family belongs to the OTP/EPROM-based CMOS 8-bit MCU category, which sits within the broader microcontroller taxonomy of: MCU -> 8-bit MCU -> RISC MCU -> PIC family. These devices are optimized for low-power operation, simple peripheral integration, and small-form-factor designs. Key features of the PIC16LC57CT-04I/SS include a 33-instruction RISC instruction set with 12-bit-wide opcodes yielding approximately 2:1 code compression versus competing 8-bit architectures, a Power-on Reset (POR) circuit, an integrated Watchdog Timer (WDT) with dedicated on-chip RC oscillator, an 8-bit real-time timer/counter with 8-bit prescaler, and a programmable code-protection mechanism. The industrial-grade -40C to +85C operating range and SSOP-28 footprint make it well suited for space-constrained designs. Architecturally, the PIC16LC57CT-04I/SS uses a Harvard architecture with separate program and data buses, a 12-bit instruction word, and a two-stage pipeline that allows most instructions to execute in a single clock cycle at 4 MHz (250 ns instruction time). On-chip peripherals are mapped to a small register file to keep context-switch latency minimal. Typical applications include low-cost appliance controllers, remote sensor signal conditioning, LED driver sequencers, simple user-interface panels, battery chargers, and consumer white-goods motor controllers. Industrial uses span logic replacement, smart metering peripherals, and cable equalization front-ends. When designing with this part, derate clock speed at high temperature corners and verify that the EPROM programming algorithm timing (per Microchip programming specification) is observed to avoid OTP programming failures. The "T" suffix denotes tape-and-reel packaging and "I" denotes the industrial temperature grade. This page synthesizes distributor pricing, SSOP-28 drop-in alternatives drawn from the same PIC16C5X silicon family, and design notes that go beyond the manufacturer datasheet to accelerate sourcing and PCB bring-up decisions.

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PIC16LC58B-04/P - 8-Bit 4MHz OTP MCU 3KB | Microchip | PDIP-18
PIC16LC58B-04/P

PIC16LC58B-04/P - 8-Bit 4MHz OTP MCU 3KB | Microchip | PDIP-18

The Microchip PIC16LC58B-04/P is a low-power CMOS 8-bit RISC microcontroller from the PIC16C5X family, providing 4 MHz CPU clock speed, 3 KB (2K x 12) of One-Time Programmable (OTP) program memory, and 73 bytes of RAM in a through-hole 18-pin PDIP package. The 'LC' suffix indicates the low-voltage CMOS variant operating from 2.5 V to 6.25 V, suitable for battery-backed and portable applications where reduced power consumption is required compared to the standard 'C' part. The '-04' speed designator indicates a 4 MHz maximum oscillator frequency, and the '/P' suffix denotes the plastic DIP-18 package. An 8-bit PIC microcontroller is a Harvard-architecture RISC processor with separate program and data buses, executed from a fixed instruction set. PIC microcontrollers occupy the hypernym hierarchy 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC. They are widely used in cost-sensitive embedded applications due to their small footprint, deterministic instruction timing, and simple development tooling. Key features of the PIC16LC58B-04/P include 12 I/O pins, a two-level deep hardware stack, direct/indirect/relative addressing modes, seven or eight special-function hardware registers, 12-bit-wide instructions with an 8-bit data path, and 33 single-word instructions. The reduced instruction set executes in a single instruction cycle (except branches which take two cycles), giving an effective throughput of 4 MIPS at 4 MHz. Typical applications include low-cost consumer appliances, battery-powered remote controls, sensor signal conditioning front-ends, simple LED drivers, and legacy industrial control replacements where pin-compatibility with older PIC16C5X designs is required. The OTP program memory allows single-pass programming for production units, lowering per-unit cost compared to flash variants. When designing with this device, ensure the MCLR reset pin is pulled high through a 10 kohm resistor and that a proper decoupling capacitor (100 nF) is placed within 5 mm of VDD. Note that OTP parts cannot be reprogrammed - design firmware thoroughly before committing to production volumes.

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PIC16LC58B-04/SO - 8-Bit 4MHz OTP MCU 3KB | Microchip
PIC16LC58B-04/SO

PIC16LC58B-04/SO - 8-Bit 4MHz OTP MCU 3KB | Microchip

The Microchip Technology PIC16LC58B-04/SO is an 8-bit RISC microcontroller from the PIC16C5X family running at up to 4 MHz, integrating 3KB of OTP program memory (2K x 12 words) and 73 bytes of RAM, packaged in an 18-pin SOIC (SO-18, 0.300-inch, plastic SO). It targets cost-sensitive embedded control applications requiring deterministic performance, low power, and a minimal external component count. What is a PIC microcontroller? A PIC (Peripheral Interface Controller) microcontroller is a compact, self-contained computer-on-a-chip built around a Harvard RISC architecture with separate program and data buses. Microchip's PIC16C5X family pioneered low-cost 8-bit OTP/EPROM/ROM MCUs, with the PIC16C5X positioned in the hierarchy as: PIC16C5X -> PIC16 family -> 8-bit MCU -> microcontroller -> embedded computing IC. The 'LC' suffix designates the low-power CMOS variant, while the 'B' suffix marks the second silicon revision. Key features include 12 I/O pins across two ports, a two-level deep hardware stack, a single 8-bit timer/counter, watchdog timer with on-chip RC oscillator, power-on reset, and a wide 2.5V to 6.25V supply voltage range. The 4 MHz oscillator frequency provides 1 microsecond instruction cycle time, and the RISC architecture delivers most instructions in a single cycle. The PIC16LC58B uses a 12-bit wide instruction word with a separate 8-bit data path, producing 2:1 code compression versus typical 8-bit CISC architectures. Seven or eight special function hardware registers support direct, indirect, and relative addressing modes. The fully static CMOS design allows clock stopping for ultra-low standby power. Typical applications include appliance control, automotive body electronics, industrial sensor interfacing, low-end consumer products, and battery-powered instrumentation. The 18-pin SOIC package suits both prototyping and space-constrained production boards, while the OTP memory suits low-volume and cost-driven designs. When designing with this part, note that OTP parts require a device programmer for code loading - choose flash-based PIC16F equivalents for in-field reprogrammability. The PIC16LC58B-04/SO is the commercial temperature grade variant (0C to +70C operating range); the 'I' suffix (PIC16LC58B-04I/SO) specifies industrial -40C to +85C. This page synthesizes distributor pricing, parametric drop-in alternatives, and practical design guidance not found in the manufacturer datasheet alone.

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PIC16LC58B-04/SS - 8-bit 4MHz OTP MCU 3KB | Microchip | 20-SSOP
PIC16LC58B-04/SS

PIC16LC58B-04/SS - 8-bit 4MHz OTP MCU 3KB | Microchip | 20-SSOP

The Microchip Technology PIC16LC58B-04/SS is an 8-bit CMOS RISC microcontroller from the PIC16C5X family, featuring 3KB (2K x 12) of One-Time-Programmable (OTP) program memory, 73 bytes of RAM, and 12 I/O lines, all packaged in a 20-pin Shrink Small-Outline Package (SSOP). It operates from a 2.5V to 6.25V supply and executes instructions at a 4 MHz clock rate using a 12-bit-wide instruction word with an 8-bit data path. What is a PIC16C5X microcontroller? The PIC16C5X family is a baseline-tier 8-bit Harvard-architecture RISC microcontroller family from Microchip Technology, widely used as a low-cost, high-performance, fully-static EPROM/ROM-based MCU. It sits at the entry level of Microchip's PIC hierarchy, between simpler 4-bit microcontrollers and the mid-range PIC16F/Enhanced PIC families, and belongs to the broader 8-bit microcontroller category within embedded microcontrollers and semiconductors. Key features of the PIC16LC58B-04/SS include seven or eight special-function hardware registers, a two-level deep hardware stack, and support for direct, indirect, and relative addressing modes. The "LC" suffix designates the low-voltage CMOS process node (2.5V to 6.25V), while the "-04" speed grade denotes a 4 MHz maximum oscillator frequency. The device is fully static, allowing the clock to be stopped without losing internal state. Typical applications for the PIC16LC58B-04/SS include low-power board designs, simple industrial control, embedded automation, motor control, and metering. The 20-SSOP package with 0.65 mm pitch makes it suitable for compact through-hole-replacement designs where board space is constrained but ease of assembly and rework is required. When designing with this part, note that the OTP program memory can only be programmed once - for prototyping consider the PIC16C58B-04/SS (windowed CERDIP) or a flash-based PIC16F equivalent such as PIC16F54.

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PIC16LC58B-04I/SO - 4MHz 8-bit OTP MCU, 3KB, 12 I/O | Microchip
PIC16LC58B-04I/SO

PIC16LC58B-04I/SO - 4MHz 8-bit OTP MCU, 3KB, 12 I/O | Microchip

The Microchip Technology PIC16LC58B-04I/SO is an 8-bit CMOS RISC microcontroller from the PIC16C5X family featuring 4MHz maximum clock speed, 3KB (2K x 12) One-Time Programmable (OTP) program memory, and 73 bytes of RAM, housed in an 18-pin SOIC package. Designed for low-cost, high-performance embedded control, it delivers 12-bit-wide instructions with 2:1 code compression versus competing 8-bit microcontrollers, and provides 12 digital I/O pins for sensor, switch, and actuator interfacing. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals. The PIC16C5X family belongs to the 8-bit microcontroller category within the broader embedded processor hierarchy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. These devices target cost-sensitive applications where deterministic execution, low power, and small code footprint outweigh the need for high clock speed or large memory. Within Microchip's portfolio, the PIC16C5X is positioned as a baseline OTP/EPROM-based family suited for high-volume, mature designs. Key features of the PIC16LC58B-04I/SO include 4MHz operation, seven or eight special-function hardware registers, a two-level-deep hardware stack, and direct, indirect, and relative addressing modes. The 12-bit instruction word with an 8-bit data path provides efficient code density, and the 2.5V to 6.25V supply range supports both 3.3V and 5V system rails. The "LC" voltage class is optimized for lower VDD operation, while the "I" suffix denotes the industrial -40C to +85C temperature range. The 18-SOIC package with 1.27mm pitch is compatible with standard surface-mount assembly lines. The PIC16LC58B uses a fully static CMOS core, allowing the clock to be stopped without losing register state, which simplifies power-saving designs. Its RISC architecture with only 33 single-cycle instructions enables predictable timing and fast interrupt response. The two-level hardware stack limits nested subroutine depth but reduces context-switch overhead for shallow call chains typical in appliance, sensor, and motor-control firmware. Typical applications include consumer appliances, battery chargers, LED lighting controllers, simple sensor interfaces, and low-end automotive body modules. The wide supply range and industrial temperature grade make it suitable for factory automation peripherals and HVAC controllers where reliability and cost dominate. When designing with this device, allocate sufficient OTP programming margin and verify code size within 2K 12-bit words before committing to mask-ROM or OTP volume orders; consider the PIC16F5X flash-based family if in-field reprogrammability is required.

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PIC16LC58BT-04/SO - 8-Bit 4MHz OTP MCU 3KB | Microchip | 18-SOIC
PIC16LC58BT-04/SO

PIC16LC58BT-04/SO - 8-Bit 4MHz OTP MCU 3KB | Microchip | 18-SOIC

The Microchip Technology PIC16LC58BT-04/SO is an 8-bit RISC microcontroller from the PIC16C5X family, featuring a 4 MHz clock speed, 3 KB (2K x 12) of One-Time Programmable (OTP) program memory, 73 bytes of RAM, and 12 digital I/O pins, all housed in a surface-mount 18-pin SOIC package. The 'LC' prefix denotes the low-power CMOS process, allowing operation across a 2.5 V to 6.25 V supply range, while the 'T' suffix identifies a tape-and-reel packaging variant and the '-04' speed grade indicates the 4 MHz maximum oscillator frequency. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripheral interfaces. The PIC16LC58B belongs to the baseline PIC16C5X architecture, which executes 12-bit-wide instructions on an 8-bit data path with a two-level deep hardware stack. This family sits within the broader hierarchy: microcontroller -> embedded processor -> semiconductor IC. The RISC-like instruction set with only 33 single-word instructions and fixed instruction timing simplifies firmware development and predicts cycle-accurate behavior, making this device attractive for cost-sensitive, deterministic control tasks. Key features include 12 I/O ports with bidirectional direction control, a watchdog timer for unattended operation, a programmable prescaler for timer-based event counting, and power-on reset. The OTP program memory enables prototype-to-production migration without NRE mask charges, and the 4 MHz clock supports instruction execution at 1 MHz (4 oscillator cycles per instruction cycle). Internal RC oscillator options reduce external component count, while the 18-SOIC package provides a manageable 0.300-inch body suitable for hand-soldered prototypes and automated assembly. Typical applications include consumer appliance control, automotive body electronics (non-safety), battery chargers, simple sensor interfaces, low-end remote controls, and replacement of discrete logic in space-constrained designs. Engineers frequently select this part for legacy product refreshes, industrial control panels, and educational development platforms where deterministic execution and minimal BOM cost outweigh the need for large memory or advanced peripherals. When designing with the PIC16LC58BT-04/SO, verify that the application's maximum clock requirement does not exceed 4 MHz and confirm supply voltage stays within 2.5 V to 6.25 V. Use Microchip's MPASM assembler or MPLAB X IDE with the PIC16C5X toolchain for firmware development. Programming requires a PICkit or compatible device programmer supporting baseline OTP devices. This page synthesizes distributor stock levels, parametric drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet summary. XAIPART provides real-time pricing across quantity breaks as of 2026-09-22, helping procurement teams compare this 18-SOIC baseline MCU against modern PIC16F1xxx successors and competing 8-bit microcontrollers.

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PIC16LC58BT-04I/SS - 8-Bit 4MHz OTP MCU 3KB 20-SSOP | Microchip
PIC16LC58BT-04I/SS

PIC16LC58BT-04I/SS - 8-Bit 4MHz OTP MCU 3KB 20-SSOP | Microchip

The Microchip Technology PIC16LC58BT-04I/SS is an 8-bit PIC16C5X family CMOS microcontroller featuring 3KB (2K x 12) of One-Time Programmable (OTP) program memory, 73 bytes of RAM, and 12 I/O lines, housed in a 20-pin SSOP package. It operates from a 2.5V to 6.25V supply and runs at a maximum clock speed of 4 MHz in a fully static CMOS core. The 'LC' prefix designates the low-voltage (2.5V–6.25V) variant of the PIC16C58B family, while the 'T' suffix denotes tape-and-reel packaging and 'I' indicates the industrial -40C to +85C temperature grade. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and peripheral I/O on one die. The PIC16C5X family belongs to the legacy PIC baseline architecture (12-bit wide instructions, 8-bit wide data path), positioned in the broader taxonomy as: PIC16C5X -> PIC16C family -> PIC baseline core -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. This architecture uses a two-level deep hardware stack with seven or eight special-function hardware registers and supports direct, indirect, and relative addressing modes for compact code density. Key features include 12-bit instruction width, 8-bit data path, two-level deep hardware stack, 7-8 special function hardware registers, 12 bidirectional I/O pins, and a Watchdog Timer for reliable operation. The fully static CMOS design allows the clock to be stopped without losing register state, and the OTP program memory supports in-system programming via Microchip's ICSP protocol. The PIC16LC58BT series is widely used in cost-sensitive, low-power embedded applications where deterministic real-time response is more important than raw compute throughput. Typical applications include industrial control modules, appliance controllers, security alarm panels, sensor signal conditioning front-ends, low-cost remote-control encoders, and general-purpose glue-logic replacement. The 12 I/O pins can drive displays, relays, keypads, or serial interfaces via firmware bit-banging. Compared to flash-based PIC16F1xxx parts, the OTP memory is one-time programmable which lowers unit cost and provides slightly better code security against reverse engineering. When designing with this part, allocate a 4-pin ICSP header (VDD, VSS, RB6, RB7) for in-system programming and reserve the MCLR/VPP pin as a reset input. Because the OTP memory cannot be erased, use a socketed SSOP footprint during prototyping or a PIC16CR58B/ROM-equivalent variant for volume code-rotation flexibility. Decouple VDD with a 100nF ceramic placed within 5mm of the VDD pin and add a 10k pull-up on MCLR for reliable reset behavior.

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PIC16LC620-04/P - 4MHz 8-Bit OTP MCU, 13 I/O, 18-PDIP | Microchip
PIC16LC620-04/P

PIC16LC620-04/P - 4MHz 8-Bit OTP MCU, 13 I/O, 18-PDIP | Microchip

The Microchip Technology PIC16LC620-04/P is an 8-bit EPROM-based CMOS microcontroller in the PIC16C family, housed in an 18-pin PDIP through-hole package. It features a 4 MHz maximum clock input (200 ns single-cycle instruction execution, except two-cycle branches), 896 bytes of One-Time Programmable (OTP) program memory organized as 512 x 14 words, and 80 bytes of on-chip data RAM with 13 digital I/O pins. The 'LC' suffix indicates a low-power CMOS variant operating across 2.5 V to 6.0 V (per datasheet characterization), making it well suited to battery and 5 V regulated designs. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and I/O peripherals on one die. The PIC16C family uses a RISC-like Harvard architecture with 35 single-word instructions, an 8-bit data path, and a 14-bit instruction word, placing it in the broader taxonomy of microcontroller -> embedded controller -> semiconductor. PIC16C parts preceded the flash-based PIC16F series and were widely deployed in low-cost appliance, industrial, and consumer products before flash erased OTP as the dominant technology. Key features include a 20 MHz maximum clock input (the '-04' speed grade limits operation to 4 MHz), an internal RC oscillator option, a 5-bit comparator with reference, a Capture/Compare/PWM (CCP) module, an 8-bit timer/counter, and a Watchdog Timer with its own on-chip RC oscillator for reliable recovery. Programmable code protection and an ICD-friendly in-circuit debug option simplify field updates and brown-out protection preserves memory integrity during power events. Architecturally, the PIC16LC620 separates program and data buses (Harvard), uses a 14-bit instruction word for compact code density, and offers two hardware stack levels for subroutine nesting. The LC process node targets ultra-low quiescent current (typically under 1 mA at 5 V/4 MHz), enabling applications where idle power matters more than peak throughput. Typical applications include low-cost remote controls, IR receivers, battery chargers, smoke detectors, fan controllers, small appliance user interfaces, security keypads, and stand-alone sensor signal-conditioning blocks. The 18-PDIP package is well suited to hand-soldered prototypes and educational kits. When designing with this device, place a 100 nF decoupling capacitor as close as possible to VDD/VSS, ensure MCLR is pulled high through a resistor for normal operation, and respect the 4 MHz oscillator ceiling for the '-04' speed grade. The OTP memory requires a device programmer; for prototyping or in-field updates, choose a flash-based PIC16F equivalent in the same 18-pin footprint.

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PIC16LC620-04/SS - 4MHz 8-bit OTP MCU 896B EPROM | Microchip
PIC16LC620-04/SS

PIC16LC620-04/SS - 4MHz 8-bit OTP MCU 896B EPROM | Microchip

The Microchip PIC16LC620-04/SS is a low-power, EPROM-based 8-bit CMOS microcontroller in a 20-pin SSOP (SS) package, part of the PIC16C5x/PIC16LC6xx mid-range family with a 4 MHz oscillator input and 896 bytes of EPROM program memory. It features an 8-bit data path, 80 bytes of RAM, 13 digital I/O pins, and an operating voltage range of 2.5 V to 6.0 V suited for battery and 5 V regulated systems. The LC designator indicates a low-power CMOS variant intended for sleep-mode-friendly consumer and industrial applications where energy budget is critical. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data memory, peripherals, and I/O on one substrate. The PIC16LC620 family historically sits in the legacy PIC16C/LC mid-range tier, mapping to the broader product hierarchy: microcontroller -> embedded MCU -> semiconductor -> electronic component. The LC sub-family specifically targets low-voltage and low-quiescent-current operation, distinguishing it from standard PIC16C parts that operate on a wider supply range. EPROM-based program memory is one-time-programmable (OTP) and shadow-programmed by Microchip for high-volume customers, offering low unit cost in fully tested, windowed-less packaging. Key features include a 35-instruction RISC instruction set, 2 hardware timer modules, a watchdog timer, and a brown-out/reset circuit for fail-safe operation. The 13 I/O pins support direct LED drive and 5 V tolerant interfacing. The 4 MHz maximum oscillator input translates to a 1 microsecond instruction cycle via the 4-clock-per-instruction PIC core, enabling simple state-machine and timing-control code without external clock multiplication. Programming is performed via Microchip's standard ICSP (In-Circuit Serial Programming) protocol, although the LC620 is supplied factory-programmed when ordered through Microchip Direct. Architecture is a Harvard-class 8-bit RISC core with separate program and data buses, 14-bit wide instruction words, and a two-stage pipeline that executes most instructions in one cycle. The CMOS EPROM cell structure yields low dynamic power dissipation proportional to clock rate, which is why the LC variant is favored in standby-dominant products such as remote controls, sensor front ends, and metering encoders. The internal oscillator and reset architecture eliminate many external components, supporting compact PCB layouts. Typical applications include appliance control boards, low-end remote-control encoders, security keypads, sensor signal conditioning front ends, simple motor control drivers, white-goods user interfaces, and industrial timing/sequencing modules. Industrial temperature grade (and commercial, depending on suffix) supports harsh-environment deployments with long-life product cycles. When selecting this MCU, note that production status is legacy/Obsolete for many LC620 SKUs - confirm lifetime-buy availability on Microchip Direct before design-in, and consider PIC16F648A-I/SS or PIC16F716 drop-in Flash replacements for new designs. The 04 speed suffix denotes 4 MHz max, while the /SS suffix denotes 20-pin SSOP package; verify operating voltage (LC = 2.5-6 V) is compatible with your supply rail. This page synthesizes distributor pricing, drop-in alternatives, and design notes not found in a single manufacturer datasheet, helping engineers evaluate the PIC16LC620-04/SS for legacy maintenance versus migration to Flash-based MCUs.

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PIC16LC620-04E/P - 4MHz 8-Bit CMOS MCU 896B OTP | Microchip | 18-PDIP
PIC16LC620-04E/P

PIC16LC620-04E/P - 4MHz 8-Bit CMOS MCU 896B OTP | Microchip | 18-PDIP

The Microchip Technology PIC16LC620-04E/P is an EPROM-based 8-bit CMOS RISC microcontroller from the PIC16C family, offering a 4MHz maximum clock speed with 200ns single-cycle instruction execution (except program branches which require two cycles). It integrates 896 bytes (512 x 14) of One-Time Programmable (OTP) program memory, 80 bytes of data RAM, and 13 I/O pins in an 18-pin PDIP package. The device operates from a 2.5V to 6.25V supply and is rated for the automotive extended temperature range. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral interfaces into one package. Within the broader taxonomy, the PIC16LC620 sits in the 8-bit RISC MCU category (microcontroller -> embedded MCU -> 8-bit MCU -> RISC MCU -> PIC16 family -> EPROM/OTP variant). Its 35-instruction RISC architecture enables compact assembly coding and deterministic real-time control, making the PIC16C family one of the longest-lived 8-bit platforms for embedded control. Key features of the PIC16LC620-04E/P include a two-level deep hardware stack, seven or eight special function hardware registers, and three addressing modes (direct, indirect, and relative). It provides 12 I/O ports, an internal watchdog timer, power-on reset, and a programmable code protection mechanism. The CMOS process delivers low power consumption suitable for battery-connected or always-on control nodes. At the architectural level, the device uses a 14-bit wide instruction word with an 8-bit data path, which is the defining characteristic of the mid-range PIC16 family. This 14-bit ISA gives the PIC16LC620 substantially more code density per instruction than 8-bit MCUs such as the 8051, while remaining simple enough to program in assembly without an external toolchain dependency for short code paths. Typical applications include industrial control logic, appliance control boards, automotive body electronics, simple sensor interfaces, and legacy embedded systems. Its OTP memory suits low-to-mid volume production where field firmware updates are not required and unit cost is a priority over in-system reprogrammability. When designing with this part, verify that the 2.5V-6.25V supply range matches the system rail and that the 4MHz oscillator spec is consistent with required control-loop timing. Migration paths to flash-based PIC16F equivalents should be evaluated for new designs requiring in-circuit reprogrammability. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found on the manufacturer datasheet front page, giving procurement and design engineers a single decision-ready reference for the PIC16LC620-04E/P.

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PIC16LC620-04E/SO - 8-Bit 4MHz OTP MCU 18-SOIC | Microchip
PIC16LC620-04E/SO

PIC16LC620-04E/SO - 8-Bit 4MHz OTP MCU 18-SOIC | Microchip

The Microchip Technology PIC16LC620-04E/SO is an 8-bit RISC microcontroller in the PIC16C family, featuring 896 bytes (512 x 14) of One-Time Programmable (OTP) program memory, 80 bytes of RAM, and 64 bytes of EEPROM data memory, housed in an 18-pin SOIC (0.295 inch / 7.50 mm width) package. It operates at a clock speed of 4 MHz and supports a supply voltage range of 2.5 V to 6.25 V, with 12 I/O ports and a 200 ns single-cycle instruction execution time. What is a PIC 8-bit OTP microcontroller? An OTP (One-Time Programmable) microcontroller is a CMOS device that uses EPROM-based non-volatile program memory, allowing a single factory or production programming cycle. The PIC16C family implements a RISC architecture with only 35 instructions, a two-level deep hardware stack, and direct/indirect/relative addressing. Within the broader semiconductor hierarchy, it sits as: microcontroller -> embedded microcontroller -> CMOS logic IC -> semiconductor. The 'LC' prefix designates a low-power CMOS variant designed for battery-friendly applications. Key features of the PIC16LC620-04E/SO include a 12-bit wide instruction word and 8-bit wide data path, seven or eight special function hardware registers, brown-out detect and power-on reset peripherals, a programmable watchdog timer, and a wide operating voltage range from 2.5 V to 6.25 V. The 'E' suffix denotes the extended automotive temperature range (-40C to +125C), making this part suitable for harsh environment designs. The 4 MHz maximum clock input yields a 200 ns instruction cycle, providing balanced throughput for low-power embedded control. The PIC16LC620 architecture uses a Harvard-style bus with separate program and data paths, enabling deterministic single-cycle execution for most instructions. Program branches are two-cycle. The 4 MHz internal clock rate is generated from an external crystal or RC oscillator, and the device includes power management features such as brown-out reset and power-on reset to improve system reliability. The OTP program memory cannot be erased, which makes this part best suited for production volumes where field firmware updates are not required. Typical applications include automotive body electronics, low-power remote controls, sensor signal conditioning, simple appliance controls, and industrial automation subsystems. The extended temperature grade and low-power CMOS design make it ideal for automotive under-hood or cabin modules operating across wide thermal ranges. It is also frequently used in legacy PIC-based designs that have been qualified and certified over many production cycles. When designing with this device, note that OTP memory cannot be re-programmed - use the PIC16F or PIC16LF flash variants if in-field firmware updates are required. Always include decoupling capacitors (0.1 uF ceramic) near the VDD pin, and ensure the MCLR pin is properly biased for reliable reset behavior. This page synthesizes distributor stock levels, drop-in alternative MPNs, and design notes not consolidated in any single manufacturer datasheet.

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PIC16LC620-04I/P - 4MHz, 8-Bit CMOS MCU, 896B OTP | Microchip
PIC16LC620-04I/P

PIC16LC620-04I/P - 4MHz, 8-Bit CMOS MCU, 896B OTP | Microchip

The Microchip Technology PIC16LC620-04I/P is an 8-bit CMOS RISC microcontroller from the PIC16C family, featuring 896 bytes (512 x 14) of One-Time Programmable (OTP) program memory and operating at up to 4 MHz clock speed in a 18-pin PDIP (0.300 inch, 7.62 mm) through-hole package. The device is specified for the extended industrial temperature range (the 'I' suffix) and supports a 2.5 V to 6.25 V supply voltage range, making it suitable for low-power and battery-friendly designs. The 'L' in PIC16LC620 designates the low-voltage/low-power CMOS variant of the PIC16C620. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (ROM/RAM), and programmable I/O peripherals. The PIC16LC620 belongs to the PIC16C family, which sits within the broader taxonomy: PIC16C -> PIC16 family -> 8-bit PIC microcontrollers -> PIC microcontrollers -> microcontrollers -> embedded processors -> semiconductors. The PIC16C series uses a RISC-based Harvard architecture with only 35 single-cycle instructions (200 ns at 20 MHz input, or 1 us at 4 MHz), enabling deterministic execution suitable for real-time control applications. Key features include 13 I/O pins, 80 bytes of RAM, an 8-bit timer/counter (TMR0), a watchdog timer, power-on reset, power-saving SLEEP mode, and a 14-bit wide instruction word with an 8-bit wide data path. The two-level hardware stack supports subroutine nesting, while direct, indirect, and relative addressing modes provide flexible memory access for C and assembly development. The device operates across the industrial temperature range and integrates an internal RC oscillator option to reduce external component count. The PIC16LC620's low-voltage CMOS process allows operation down to 2.5 V, an advantage versus standard 5 V-only PIC16C620 parts. This makes it well suited to portable instrumentation, 3 V battery systems, and energy-harvesting nodes. The architecture supports in-circuit serial programming (ICSP) through the RB6/RB7 pins, enabling field updates and factory calibration without removing the device from the board. Typical applications include consumer appliance control, low-end remote-control transmitters, LED driver controllers, simple sensor interfaces, automotive interior sub-modules, and battery-powered embedded subsystems. Designers select the PIC16LC620 when they need deterministic 8-bit performance with the flexibility of OTP memory for moderate-volume production. When designing with the PIC16LC620-04I/P, note that the '04' speed grade denotes 4 MHz operation versus the 20 MHz '20' grade. Verify that the MCLR, VDD, VSS, OSC1/OSC2, and ICSP pin assignments match your existing layout before substituting a higher-speed variant, as pin-compatible PIC16LC620A or PIC16F628 drop-ins may require firmware changes due to enhanced peripheral register maps. This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical design notes drawn from the Microchip datasheet and reference designs - information not consolidated on any single manufacturer or distributor page.

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PIC16LC620-04I/SS - 4MHz 8-Bit CMOS MCU 896B OTP 20-SSOP | Microchip
PIC16LC620-04I/SS

PIC16LC620-04I/SS - 4MHz 8-Bit CMOS MCU 896B OTP 20-SSOP | Microchip

The Microchip Technology PIC16LC620-04I/SS is an EPROM-based 8-bit CMOS microcontroller from the PIC16C family delivering 4 MHz operation in a 20-pin SSOP package. It integrates 896 bytes of OTP program memory (organized as 512 x 14), 80 bytes of data RAM, and a 13-bit instruction set with 35 single-cycle instructions (200 ns instruction cycle, except program branches which are two-cycle). The part supports an operating voltage range of 2.5V to 6.0V typical for the LC low-power variant, with 4 MHz maximum clock input. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data RAM, and peripheral interfaces on one die. Within the broader semiconductor taxonomy, the PIC16LC620 belongs to the microcontrollers > embedded ICs > integrated circuits hierarchy. Its RISC architecture and Harvard memory layout (separate program and data buses) allow most instructions to execute in a single instruction cycle, enabling deterministic real-time control. The LC variant specifically targets low-power applications where battery life is critical, distinguishing it from the standard C and upgraded A revisions. Key features of the PIC16LC620-04I/SS include 35 instructions to learn (single-cycle, with the exception of two-cycle branches), 8-level hardware stack, 4 oscillator selection options (RC, LP, XT, HS), power-on reset, watchdog timer, power-saving SLEEP mode, and programmable code protection. The device also includes a comparator module and 13 I/O pins. Industrial temperature grade (-40C to +85C) supports operation in harsh environments. The PIC16LC620-04I/SS architecture uses a 14-bit instruction word with separate 8-bit data path, allowing compact code density for state-machine and control-loop applications. The OTP program memory (One-Time Programmable) enables cost-effective low-volume production with programming performed at the factory or by the user with a device programmer. The 80-byte RAM supports small state tables and stack frames typical of motor-control and sensor-interface designs. Typical applications include low-power battery-operated sensors, simple motor control circuits, automotive interior subsystems, industrial process controllers, white-goods control boards, and consumer appliance user interfaces. The 4 MHz clock and 200 ns instruction cycle suit timing-sensitive tasks such as PWM generation, event counting, and basic serial communication. When designing with this device, plan for OTP programming (one-time only, no field re-programming) - use PIC16F series equivalents for development flexibility. The SSOP-20 footprint is the same as the PIC16C620 family, enabling PCB layout reuse across temperature grades and process variants. This page synthesizes distributor stock, cross-reference substitutes, and engineering guidance not consolidated on the manufacturer datasheet or distributor listing pages.

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PIC16LC620A-04/P - 8-bit OTP MCU, 4 MHz, 18-PDIP | Microchip
PIC16LC620A-04/P

PIC16LC620A-04/P - 8-bit OTP MCU, 4 MHz, 18-PDIP | Microchip

The Microchip Technology PIC16LC620A-04/P is an EPROM-based 8-bit CMOS microcontroller in the PIC16C family, offered in an 18-pin PDIP through-hole package with 4 MHz maximum clock input and a 200 ns single-cycle instruction period. It integrates 896 bytes (512 × 14) of One-Time-Programmable (OTP) program memory and 96 bytes of RAM, with 13 I/O pins supporting direct, indirect, and relative addressing. The device operates from 2.5 V to 6.25 V across the commercial temperature range and features a two-level deep hardware stack with seven or eight special-function hardware registers. An OTP microcontroller is a programmable MCU whose program memory can be written exactly once, typically during board production or low-volume prototyping. The PIC16C/PIC16LC family belongs to Microchip's mid-range 8-bit architecture, sitting between the baseline PIC10/12/16 families and the higher-end PIC18 family in the broader 8-bit MCU taxonomy, which itself rests under embedded microcontrollers and CMOS logic. The "LC" prefix denotes an extended low-voltage CMOS variant that supports battery-friendly supply rails while remaining code-compatible with the PIC16C620A baseline. Key features include 35 single-cycle instructions, 12-bit wide instruction words with an 8-bit data path, two comparators with programmable reference, an 8-bit timer/counter, a 16-bit timer/counter, and a watchdog timer with its own on-chip RC oscillator. Brown-out reset and power-on reset simplify board-level firmware reliability. The 18-PDIP footprint (.300 inch) supports legacy through-hole designs, hobbyist prototyping, and educational platforms where socketed parts are commonly used. The PIC16LC620A-04/P uses a RISC-style Harvard architecture with separate program and data buses, allowing the CPU to fetch the next instruction while accessing the current data memory. The internal oscillator option and flexible I/O mapping reduce external component count, and the low-power CMOS process enables low quiescent current for standby operation in battery-backed equipment. Typical applications include industrial control logic, automotive body modules (non-safety), sensor conditioning front-ends, low-cost consumer appliances, hobby electronics, and legacy product maintenance. The through-hole PDIP package is also widely used in educational lab kits where the device is frequently re-socketed. The OTP memory suits low-to-medium production volumes where firmware is finalized and frequent re-programming is not required. When designing with this part, choose an external clock source or crystal consistent with the 4 MHz maximum specification. Ensure the OTP programming algorithm uses Microchip's standard VPP/VDD sequencing, and account for the two-level hardware stack limit when writing firmware that depends on deep subroutines. Verify brown-out reset voltage thresholds against the lowest expected supply rail. This page consolidates distributor pricing as of 2026-09-22, drop-in alternatives sourced from Microchip's mid-range PIC16 family, and practical design notes that extend beyond the manufacturer datasheet.

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PIC16LC620A-04/SO - 8-Bit 4MHz OTP MCU, 896B EPROM, 18-SOIC
PIC16LC620A-04/SO

PIC16LC620A-04/SO - 8-Bit 4MHz OTP MCU, 896B EPROM, 18-SOIC

The Microchip Technology PIC16LC620A-04/SO is an EPROM-based 8-bit CMOS microcontroller from the PIC® 16C family, featuring 896 bytes of One-Time-Programmable (OTP) program memory, 96 bytes of RAM, and a 4 MHz instruction clock in an 18-pin SOIC package. According to distributor data, it integrates 12 I/O lines, a 14-bit instruction word, an 8-bit data path, and a two-level deep hardware stack with direct, indirect, and relative addressing modes. The "LC" prefix designates the low-voltage CMOS variant optimized for 3.3V/5V operation, supporting supply voltages from 2.5V to 6.25V per the manufacturer datasheet. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (program + data), and peripherals on one die, optimized for embedded control tasks where deterministic real-time response, low power, and small footprint outweigh raw computational throughput. Within the semiconductor hierarchy, this PIC16LC620A belongs to the 8-bit MCU category, which sits below 16-bit and 32-bit MCUs in raw compute power but above pure discrete logic in functional integration. The "RISC" Harvard architecture used by PIC MCUs separates program and data buses, allowing simultaneous instruction fetch and operand access for predictable interrupt latency. Key specifications of the PIC16LC620A-04/SO include 4 MHz maximum clock speed, 896 bytes (512 x 14) of OTP program memory organized as 14-bit words, 96 bytes of general-purpose RAM, 36 bytes of special-function registers, 12 digital I/O pins, and a wide 2.5V to 6.25V supply range that supports both battery-powered and 5V regulated systems. The 18-pin SOIC (Small Outline IC) package offers a compact 0.300-inch wide plastic footprint suitable for surface-mount assembly on standard PCBs, while retaining pin compatibility with the broader PIC16C62x family for design reuse. The architecture uses a 14-bit wide instruction set, an 8-bit data path, and seven or eight special-function hardware registers. Two-level deep hardware stack supports subroutine nesting, while direct, indirect, and relative addressing modes give the compiler flexibility for efficient code generation. Brown-out detection, a watchdog timer, and an internal RC oscillator reduce external component count for cost-sensitive industrial control, metering, and low-power board designs. Typical applications include industrial control subsystems, IoT edge nodes, embedded automation, motor-control interface logic, electronic metering, and general-purpose low-power board designs where deterministic 8-bit processing and OTP one-time programming provide a low-cost, code-protected solution. The wide supply range simplifies designs that must operate from unregulated battery rails. When designing with the PIC16LC620A-04/SO, verify that the 4 MHz instruction rate is sufficient for your real-time loop. Because this is an OTP part, code cannot be erased or rewritten - choose the PIC16F62x Flash equivalent for development or field-updateable production. Programming requires a Microchip MPLAB PM3, ICD, or PICkit programmer that supports the PIC16C620A device ID. This page synthesizes distributor pricing, datasheet pinouts, and drop-in alternative MPNs not found in any single manufacturer datasheet, giving engineers a one-stop comparison resource for the PIC16LC62x family.

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PIC16LC620A-04/SS - 8-bit PIC MCU, 4MHz, 896B OTP, SSOP-20
PIC16LC620A-04/SS

PIC16LC620A-04/SS - 8-bit PIC MCU, 4MHz, 896B OTP, SSOP-20

The Microchip Technology PIC16LC620A-04/SS is an 8-bit EPROM-based CMOS microcontroller from the PIC PIC 16C family, delivering 4MHz maximum clock speed with a 200ns instruction cycle in a 20-pin SSOP package. It integrates 896 bytes (512 x 14) of One-Time-Programmable (OTP) program memory, 96 bytes of RAM, and 13 general-purpose I/O pins. The device operates across a 2.5V to 5.5V supply range and is qualified for the commercial 0C to +70C temperature window. A PIC (Peripheral Interface Controller) microcontroller is a Harvard-architecture RISC processor family introduced by Microchip in 1975, widely used in embedded systems for its compact instruction set, deterministic timing, and rich peripheral integration. Within Microchip's taxonomy, PIC microcontrollers sit under 8-bit microcontrollers, which in turn fall under the broader category of microcontrollers and embedded processors. The 'LC' suffix indicates a low-power CMOS variant designed for battery-friendly operation, while the '04' suffix denotes the 4MHz speed grade. Key features include 35 single-word instructions, all executed in a single 200ns instruction cycle except program branches which require two cycles, and a programmable code protection mechanism. The internal architecture includes an 8-bit ALU, eight-level hardware stack, and on-chip oscillator options. The 13 I/O pins support individual direction control, and the device offers power-saving SLEEP mode with multiple wake-up sources. Typical applications include low-cost consumer appliances, sensor signal conditioning, automotive body electronics, battery-powered instruments, and industrial control subsystems. The SSOP-20 footprint also makes it well suited for space-constrained PCB designs where a 20-pin surface-mount solution is required. When designing with this device, ensure that the OTP memory programming sequence is fully understood since OTP cannot be erased once written. For new designs, designers often migrate to the Flash-based PIC16F family for in-system reprogrammability while retaining pin compatibility.

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PIC16LC620A-04E/P - 8-bit OTP MCU, 4MHz, 896B EPROM | Microchip
PIC16LC620A-04E/P

PIC16LC620A-04E/P - 8-bit OTP MCU, 4MHz, 896B EPROM | Microchip

The Microchip Technology PIC16LC620A-04E/P is an EPROM-based 8-bit CMOS microcontroller (MCU) from the PIC16C family, offering a 4 MHz maximum clock input, 896 bytes of EPROM program memory (512 x 14), and 96 bytes of data RAM in an 18-pin PDIP through-hole package. It exposes 13 I/O pins, executes 35 single-cycle instructions in 200 ns (except branches which take two cycles), and supports a 2.5V to 6.25V supply voltage range for low-power embedded designs. The 'LC' prefix designates the low-voltage CMOS variant; the '04' speed grade denotes 4 MHz operation; the 'E' indicates the extended operating temperature range; and the '/P' suffix identifies the 18-pin PDIP package. A microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and peripheral interfaces. The PIC16C/PIC16LC families belong to Microchip's 8-bit mid-range architecture hierarchy: 8-bit MCU -> mid-range MCU -> Harvard architecture -> RISC MCU -> embedded microcontroller. The 'LC' sub-family specifically targets battery-powered and low-voltage applications by extending the supply range down to 2.5V compared to the standard 4.5V minimum of the PIC16C parts. Key features of the PIC16LC620A-04E/P include a 12-bit-wide instruction word, 8-bit data path, seven special function hardware registers, a two-level deep hardware stack, and direct/indirect/relative addressing modes. It integrates two analog comparators with a programmable reference, a capture/compare/PWM (CCP) module, and an 8-bit timer/counter (TMR0) with an 8-bit prescaler. The device also includes a power-on reset (POR), brown-out reset (BOR), and a watchdog timer (WDT) with its own on-chip RC oscillator for reliable operation in noisy environments. The PIC16LC620A integrates EPROM program memory that can be erased with ultraviolet light, making it suitable for development and low-volume production where firmware changes are anticipated. The Harvard architecture separates program and data buses, allowing instruction fetch and data access to occur in the same cycle for predictable 200 ns instruction execution. The four interrupt sources, seven I/O ports with individual direction control, and digital-only I/O capability enable interfacing to switches, LEDs, relays, and simple serial protocols. Typical applications include appliance control, sensor signal conditioning, low-power remote controls, security and alarm panels, automotive body electronics, and small-scale industrial automation. The wide 2.5V-6.25V supply range also makes the part suitable for 3.3V and 5V mixed-rail designs, while the OTP memory allows field-programmable firmware updates during prototyping. When designing with this part, use a 4 MHz external ceramic resonator or crystal and place decoupling capacitors (100 nF and 10 uF) as close as possible to VDD/VSS pins. Note that the OTP memory cannot be electrically erased, so for high-volume production consider the flash-based PIC16F or PIC16LF family equivalents. Verify that the firmware workload does not exceed the two-level hardware stack depth. This page synthesizes distributor pricing, drop-in PIC16 family alternatives, and practical design notes not found in the standalone datasheet, providing context that complements the original manufacturer documentation.

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PIC16LC620A-04E/SO - 8-Bit 4MHz OTP MCU 896B | Microchip
PIC16LC620A-04E/SO

PIC16LC620A-04E/SO - 8-Bit 4MHz OTP MCU 896B | Microchip

The Microchip Technology PIC16LC620A-04E/SO is an 8-bit EPROM-based CMOS microcontroller from the PIC® 16C family, delivering 4 MHz CPU performance with 896 bytes of OTP program memory (organized as 512 x 14) and 96 bytes of data RAM, all housed in a lead-form 18-pin SOIC (SO) package. Key specifications include 12 I/O pins, a 2-level hardware stack, a 35-instruction RISC instruction set with 200 ns single-cycle execution (except program branches which are 2-cycle), and a wide operating voltage range from 2.5 V to 6.25 V. The device is built on Microchip's proprietary PIC RISC architecture and is offered in the extended (-E) temperature grade. A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, working RAM, and peripheral blocks such as timers, comparators, and I/O. The PIC16C family specifically targets cost-sensitive embedded designs where deterministic instruction timing and code density matter more than raw clock speed. The 14-bit wide instruction word lets a single instruction encode an opcode plus an immediate operand or address, producing compact code for read/write control, sensor interfaces, and simple state machines. Within the broader hierarchy, this part is a member of: MCU -> 8-bit MCU -> PIC16 family -> PIC16C sub-family -> power-management (LC, low-voltage variant) and EPROM (windowless/OTP) memory class. Differentiating features include an 8-bit timer/counter with a programmable 8-bit prescaler, an analog comparator block with programmable reference, a watchdog timer with its own on-chip RC oscillator, and a 12-bit-wide instruction format that keeps opcode+data in a single word for predictable fetch. The PIC16LC620A also provides seven or eight special function hardware registers, direct/indirect/relative addressing modes, and an interrupt controller with context-saving hardware, enabling tight loop control in motor, lighting, and appliance designs. The RISC core runs at a 4 MHz external clock for a 200 ns instruction cycle. CMOS fabrication combined with the LC (low-power) silicon gives this part an active current well below 2 mA at 5 V, and a sleep current in the microamp range when the watchdog is disabled - well-suited to battery and line-powered appliances. EPROM program memory means the device is one-time programmable, making it appropriate for volume production but not for field firmware updates. Typical applications include appliance control boards, simple sensor interfaces, automotive interior lighting modules, low-end motor-control BLDC/PWM front ends, IR remote-control decoders, and general-purpose 5 V logic-replacement boards where deterministic 200 ns instruction execution is desired. Designers of analog-front-end subsystems also use the on-chip comparator for zero-crossing and threshold detection. For reliable operation, observe Vdd decoupling with a 100 nF ceramic placed within 5 mm of the Vdd pin, an RC reset network on MCLR with the diode-reset scheme recommended in the Microchip PIC16C62X datasheet, and a crystal or resonator network sized for the 4 MHz clock (typical fundamental-mode, 22 pF load). Avoid routing high-current switching traces adjacent to the OSC1/OSC2 pins to minimize jitter on the system clock. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single source for cross-referencing the PIC16LC620A-04E/SO against same-package OTP and flash-based PIC16 MCU options.

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PIC16LC620A-04E/SS - 8-bit OTP MCU, 4MHz, 20-SSOP | Microchip
PIC16LC620A-04E/SS

PIC16LC620A-04E/SS - 8-bit OTP MCU, 4MHz, 20-SSOP | Microchip

The Microchip Technology PIC16LC620A-04E/SS is an EPROM-based 8-bit CMOS microcontroller from the PIC16C family, operating at 4 MHz with 896 bytes of one-time programmable (OTP) program memory and 96 bytes of data RAM, housed in a 20-pin SSOP (0.209 inch, 5.30 mm width) package. The LC variant runs from a low-voltage supply of 2.5 V to 6.25 V, supporting both 3.3 V and 5 V rails typical in mixed-voltage embedded designs. It provides 13 I/O pins across two ports (12 I/O plus 1 input-only), a 2-level hardware stack, and a RISC instruction set of only 35 single-cycle instructions for fast code development. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, program memory, and peripherals on one die. The PIC16C/LC family uses a Harvard RISC architecture with separate program and data buses, enabling single-cycle instruction execution (200 ns at 20 MHz). Within the broader hierarchy, this part sits as: 8-bit MCU -> RISC microcontroller -> embedded controller -> semiconductor IC. The 'LC' subfamily denotes the low-voltage (2.5-6.25 V) range, while 'C' versions require 4.5-5.5 V; engineers select the LC variant for battery-powered or 3.3 V-only systems. Key features of the PIC16LC620A-04E/SS include 12-bit wide instructions with 8-bit wide data path, seven or eight special function hardware registers, two-level deep hardware stack, and direct/indirect/relative addressing modes. The '04' speed grade denotes a 4 MHz maximum oscillator, while the 'E' suffix indicates the Extended industrial temperature range (-40C to +125C). The OTP program memory uses EPROM cells that can be programmed once with a standard device programmer (e.g., MPLAB PM3). Typical applications include automotive body controllers (under-hood and cabin modules), industrial sensor interfaces, consumer appliance control boards, low-power remote sensor nodes, and replacement of legacy 8051 designs where a smaller code footprint is needed. The 13 I/O pins can drive LED indicators, read push-buttons, interface to UART peripherals, and bit-bang simple serial protocols. When designing with this part, ensure your programmer supports OTP EPROM devices and budget for in-circuit emulation during development. The PIC16LC620A has been superseded by flash-based PIC16F equivalents (e.g., PIC16F636) for new designs, but remains in production for long-lifecycle automotive and industrial customers.

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PIC16LC620A-04I/SO - 8-Bit MCU, 4MHz, 896B OTP, 18-SOIC | Microchip
PIC16LC620A-04I/SO

PIC16LC620A-04I/SO - 8-Bit MCU, 4MHz, 896B OTP, 18-SOIC | Microchip

The Microchip Technology PIC16LC620A-04I/SO is an EPROM-based 8-bit CMOS microcontroller from the PIC16C family, delivering 4 MHz operation with 896 bytes (512 x 14) of One-Time-Programmable (OTP) program memory in an 18-pin SOIC package. It integrates an 8-bit RISC core, 96 bytes of RAM, 13 I/O pins, and two hardware timers with a 200 ns single-cycle instruction execution, targeting low-power cost-sensitive embedded control applications. The device operates from 2.5 V to 6.0 V across the industrial temperature range. An 8-bit MCU (microcontroller) is a single-chip computer that integrates a CPU, memory, and peripherals on one die. PIC16C-family microcontrollers are RISC-based, executing one instruction per cycle (except branches) and leveraging a Harvard architecture with separate program and data buses. Within the broader semiconductor taxonomy, an 8-bit MCU sits as a subset of microcontrollers, which in turn belong to the embedded processors category and ultimately integrated circuits (ICs). Key features of the PIC16LC620A-04I/SO include 35 single-word instructions, a two-level deep hardware stack, direct/indirect/relative addressing modes, a precision internal oscillator option, and a programmable watchdog timer. The 'LC' prefix denotes a low-voltage CMOS variant optimized for battery-powered operation, while the 'I' suffix indicates an industrial temperature range of -40C to +85C. Architecturally, the PIC16LC620A-04I/SO uses a 14-bit program word width with an 8-bit data path, enabling compact instruction encoding while preserving C-code efficiency. The OTP memory is factory- or field-programmable using Microchip's MPLAB development tools. On-chip peripherals include an 8-bit Timer0 with programmable prescaler, a watchdog timer with on-chip RC oscillator, and a brown-out reset (BOR) circuit. Typical applications include consumer appliance controls, automotive body electronics, industrial sensor interfaces, low-power remote-control transmitters, and battery-powered instrumentation. The wide voltage range allows direct operation from 3.3V or 5V rails, simplifying integration into mixed-voltage systems. When designing with this part, note that OTP memory cannot be reprogrammed in-circuit - choose flash-based PIC16F variants if iterative development is required. The 18-SOIC footprint is pin-compatible across the PIC16C620/621/622 family, enabling PCB reuse when migrating between memory densities. This page consolidates Microchip datasheet specifications, current distributor pricing, drop-in same-package alternatives (PIC16LC620A-04/SO, PIC16LC620A-04E/SO), and engineering design notes not found in the manufacturer datasheet alone.

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PIC16LC620A-04I/SS - 8-bit OTP MCU, 896B, 4MHz, SSOP-20 | Microchip
PIC16LC620A-04I/SS

PIC16LC620A-04I/SS - 8-bit OTP MCU, 896B, 4MHz, SSOP-20 | Microchip

The Microchip PIC16LC620A-04I/SS is an EPROM-based 8-bit CMOS microcontroller from the PIC16C family, delivering 4 MIPS performance at 4 MHz clock input in a 20-pin SSOP (5.30 mm body) surface-mount package. The device integrates 896 bytes of OTP program memory (organized as 512 x 14), 96 bytes of RAM, and 13 bidirectional I/O pins, with a 12-bit-wide instruction set and 8-bit-wide data path. An MCU (microcontroller) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral I/O on one die. The PIC16C architecture belongs to the PIC10/12/16 family of RISC microcontrollers, which sits inside the broader 8-bit microcontroller category. 8-bit MCUs continue to dominate cost-sensitive, deterministic, low-power embedded designs - especially where code density and ease of programming outweigh raw throughput. Within that family, OTP (One-Time Programmable) variants such as the PIC16LC620A are intended for volume production where field firmware updates are not required and per-unit programming cost must remain low. Key features include a 35-instruction RISC core, single-cycle execution except for program branches (200 ns instruction cycle at 20 MHz input clock), a two-level hardware stack, and a programmable watchdog timer. The wide operating voltage range of 2.5V to 6.25V allows direct connection to both 3.3V and 5V rails, while the internal comparator and 8-bit timer modules support mixed-signal designs. Two comparators with programmable reference voltages provide analog signal conditioning without external op-amps. Typical applications include automotive interior lighting controllers, appliance user-interface panels, simple sensor conditioning, battery-powered instrumentation, and stand-alone logic-replacement boards. The 13 I/O pins easily drive LED arrays, key-scan matrices, and low-speed serial interfaces such as UART or I2C in master mode. The PIC16LC620A-04I/SS (industrial temperature grade -40C to +85C) is suitable for environments where the commercial-grade /04 version cannot operate. When migrating code, note that the 'LC' suffix denotes the low-voltage CMOS variant and that the 'I' suffix is the industrial temperature grade. For new designs consider flash-based PIC16F equivalents to simplify firmware iteration during prototyping.

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PIC16LC620AT-04E/SO - 8-Bit OTP MCU, 4MHz, 18-SOIC | Microchip
PIC16LC620AT-04E/SO

PIC16LC620AT-04E/SO - 8-Bit OTP MCU, 4MHz, 18-SOIC | Microchip

The Microchip Technology PIC16LC620AT-04E/SO is an 8-bit RISC microcontroller (MCU) in the PIC 16C family that operates at a 4 MHz core clock, integrates 896 B (512 x 14) of One-Time Programmable (OTP) program memory, 96 B of data RAM, and 12 digital I/O pins, all housed in a 18-SOIC wide-body package. The 'LC' suffix denotes the low-voltage CMOS process node that enables operation from 2.5 V to 6.25 V, the 'A' revision incorporates architectural refinements such as improved Brown-out Reset (BOR) and Power-On Reset (POR) behavior, and the '04' speed grade specifies a 4 MHz oscillator domain, while the 'T' suffix indicates tape-and-reel packing and the 'E' grade specifies the -40C to +125C industrial operating range. An 8-bit microcontroller is a single-chip computer that integrates a CPU, non-volatile program memory, volatile data memory, and peripheral I/O into one package; the PIC16 family, specifically, uses a Harvard architecture with a 14-bit instruction word and an 8-bit data path, placing it within the broader MCU taxonomy of RISC microcontroller -> embedded controller -> semiconductor device. PIC microcontrollers are widely adopted in cost-sensitive, deterministic control applications because of their small footprint, low power consumption, and predictable instruction timing. Key features include a 4 MHz operating frequency, 2-level deep hardware stack, 12-bit instruction width with direct/indirect/relative addressing, 7-8 special function hardware registers, and integrated peripherals such as Brown-out Detect/Reset (BOR), Power-On Reset (POR), and a Watchdog Timer (WDT). The 18-SOIC (300 mil, 7.50 mm) wide-body plastic package is industry-standard and enables both hand-prototyping and high-volume automated assembly. Architecturally, the device uses a modified Harvard RISC core where program and data memory are accessed through separate buses, allowing instruction fetch and operand read to overlap in some cycles. The OTP program memory field is one-time programmable, meaning each unit must be programmed at production time, which is well-suited to high-volume commercial SKUs but not to prototyping iteration. Typical applications include automotive interior body controllers and instrument clusters, industrial low-cost sensor interface nodes, consumer appliance control boards, and discrete logic-replacement subsystems that benefit from MCU-driven flexibility. The industrial -40C to +125C operating range and BOR/POR/WDT integration make it particularly well-suited for headless embedded designs that must survive harsh electrical environments. When designing with this device, ensure your programmer supports the PIC16C OTP family and budget erase/write cycles carefully, as OTP memory cannot be reprogrammed; a windowed (JW) variant is required for iterative development before locking the design into OTP. Decoupling must follow the manufacturer recommended 100 nF + bulk capacitor layout at the VDD/VSS pins to ensure clean processor operation. This page synthesizes distributor live-pricing tiers, drop-in OTP MCU alternatives, and pin-compatibility guidance that the manufacturer datasheet appendix does not list together in one table.

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PIC16LC620AT-04E/SS - 8-Bit 4MHz OTP MCU 896B | Microchip
PIC16LC620AT-04E/SS

PIC16LC620AT-04E/SS - 8-Bit 4MHz OTP MCU 896B | Microchip

The Microchip Technology PIC16LC620AT-04E/SS is an 8-bit CMOS EPROM-based microcontroller from the PIC16C family, featuring a 4 MHz maximum clock speed, 896 bytes (512 x 14) of One-Time Programmable (OTP) program memory, and 96 bytes of RAM, housed in a 20-pin SSOP package. It operates from a 2.5V to 6.25V supply and exposes 13 I/O pins through its 12-bit wide instruction set with an 8-bit wide data path. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral interfaces. The PIC16C 8-bit architecture uses a RISC-style instruction set with only 35 instructions, two-level deep hardware stack, and direct, indirect, and relative addressing modes. This positions the PIC16C family below higher-end PIC18 and dsPIC devices but above base-level 14-bit PIC10/12/16 families in computational capability and code density. Key features of this part include Brown-out Detect/Reset (BOD), Power-On Reset (POR), and a Watchdog Timer (WDT) for robust operation in electrically noisy environments. The 'LC' designation indicates a low-voltage CMOS variant supporting operation down to 2.5V, while the '-04E' suffix denotes a 4 MHz speed grade with the extended industrial operating temperature range of -40C to +125C. The '/SS' package suffix identifies the 20-pin Shrink Small Outline Package (SSOP, 0.209 inch / 5.30 mm body width). The PIC16LC620A core implements a Harvard architecture with separate program and data buses, allowing simultaneous instruction fetch and operand access. The OTP program memory cannot be erased, so this part is intended for production-volume designs after prototype verification on windowed or flash-based variants. Typical applications include appliance control, sensor signal conditioning, simple motor control, automotive body electronics, and low-power embedded control nodes where the wide 2.5V-6.25V supply range simplifies battery or regulated-rail integration. Peripherals such as the 8-bit timer/counter and analog comparator are sufficient for low-cost consumer and industrial feedback loops. When designing with this device, note that OTP memory precludes firmware updates in the field; select the PIC16F620 flash-based equivalent for prototypes and serviceable products. A stable decoupling capacitor of 100 nF placed within 5 mm of the VDD pin is essential to suppress switching noise that could trigger spurious brown-out resets. This page synthesizes distributor pricing, same-family drop-in alternatives from the Site MPN list, and practical design considerations not found in the standalone Microchip datasheet PDF.

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