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PIC16C57T-LPI/SO - 3KB OTP 8-bit MCU 28-SOIC | Microchip Technology
PIC16C57T-LPI/SO

PIC16C57T-LPI/SO - 3KB OTP 8-bit MCU 28-SOIC | Microchip Technology

The Microchip Technology PIC16C57T-LPI/SO is a member of the PIC16C5X family of low-cost, high-performance 8-bit fully-static EPROM/ROM-based CMOS microcontrollers, delivering up to 40 kHz operation from a 5 V supply in a 28-pin SOIC (SO) gull-wing surface-mount package with industrial temperature grade. According to the verified search result on findic.us, the device is described as 'a family of low cost, high performance, 8-bit fully static, EPROM/ROM-based CMOS microcontrollers' using the PIC RISC architecture with 33 single-word/single-cycle instructions. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/EPROM/Flash/OTP), data RAM, and peripherals such as I/O ports and timers into one package. The PIC16C5X series uses One-Time-Programmable (OTP) EPROM, which lets manufacturers program each unit during production. OTP MCUs are positioned within the broader microcontroller hierarchy as: 8-bit MCU -> RISC MCU -> microcontroller -> embedded processor -> semiconductor IC. This family targets cost-sensitive, deterministic control applications. Key features include 3 KB of OTP program memory (organized as 2K x 12), 72 bytes of data RAM, 20 digital I/O pins, two 8-bit timers (TMR0 and TMR2), a watchdog timer, and the PIC RISC core providing single-cycle instruction execution with two-cycle branches. The 12-bit wide instructions achieve 2:1 code compression over other 8-bit MCUs in the same class. Operating voltage is 2.5 V to 5.5 V (verified via the LPI low-power-industrial speed grade). Typical applications for the PIC16C57T-LPI/SO include appliance controls, simple sensor interfaces, low-cost consumer electronics, lighting controllers, automotive body modules (non-safety), and remote-control transmitters. The wide 2.5 V to 5.5 V supply range allows operation directly from 3.3 V or 5 V rails. When migrating designs, the LPI speed grade supports 40 kHz operation at low Vdd for power-constrained applications. The 'T' suffix indicates tape-and-reel packaging for high-volume SMT production. When designing with this device, ensure your firmware toolchain supports the PIC16C5X baseline core. Unlike modern PIC16F1xxx parts with flash memory, the OTP variant requires production programming; for prototyping, consider PIC16F57-I/SO as a flash equivalent in the same 28-SOIC pinout.

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PIC16C57T-LPI/SS - 8-Bit 40MHz EPROM MCU 3KB OTP 28-SSOP | Microchip
PIC16C57T-LPI/SS

PIC16C57T-LPI/SS - 8-Bit 40MHz EPROM MCU 3KB OTP 28-SSOP | Microchip

The Microchip Technology PIC16C57T-LPI/SS is an EPROM/ROM-based 8-bit CMOS microcontroller from the PIC16C5X family, delivering up to 40 MHz operation with 3 KB (2K x 12) of One-Time-Programmable (OTP) program memory in a 28-pin SSOP package. The 'T' suffix denotes the tape-and-reel packaging variant, the 'LPI' suffix indicates the low-power industrial (LP) operating temperature range with the industrial speed grade, and the '/SS' suffix specifies the 28-pin Shrink Small-Outline Package. 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 that integrates a CPU, program memory, RAM, and peripherals. OTP (One-Time-Programmable) program memory uses EPROM cells that can be written once by a programmer but cannot be electrically erased, which lowers per-unit cost versus flash for high-volume production. The PIC16C5X family sits at the low-cost/high-performance tier of the 8-bit MCU taxonomy: PIC16C5X -> PIC16C -> 8-bit PIC microcontroller -> PIC MCU -> microcontroller -> embedded processor. Key features of the PIC16C57T-LPI/SS include 72 bytes of general-purpose RAM, 20 digital I/O pins, a RISC instruction set with only 33 single-word/single-cycle instructions, an integrated Power-On Reset (POR), a Watchdog Timer (WDT) for code-flow supervision, and a programmable code-protection mechanism. The device operates from 2.5 V to 6.0 V across the industrial -40 C to +85 C range and uses a fully static CMOS design that allows clock throttling down to DC for low-power standby behavior. Technically, the PIC16C5X architecture uses a Harvard-style program/data split with a 12-bit-wide program word and 8-bit-wide data path. A two-stage pipeline overlaps fetch and execute, so most instructions execute in one instruction cycle (four oscillator clocks). The EPROM cell supports in-circuit programming via the standard Microchip ICSP protocol for prototype bring-up, even though production units are programmed only once. Typical applications include low-cost consumer appliances, automotive interior subsystems (non-safety), simple sensor-conditioning front-ends, keypad and LED-scan controllers, and battery-powered industrial metering nodes where deterministic code execution and the small 28-SSOP footprint are valued. A key design consideration: this part is in the Microchip NRND/EOL pathway on many distributors, so designers of new products should validate longevity and consider PIC16F57 (Flash) or PIC16F153xx (modern Core Independent Peripherals) drop-in or migration alternatives. This page synthesizes distributor pricing, drop-in same-package alternatives from the PIC16C5X family, and practical design notes not found in the manufacturer datasheet alone, giving engineers an information-gain view for sourcing and migration decisions.

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PIC16C57T-RCE/SS - 8-bit OTP MCU 3KB 28-SSOP | Microchip
PIC16C57T-RCE/SS

PIC16C57T-RCE/SS - 8-bit OTP MCU 3KB 28-SSOP | Microchip

The Microchip Technology PIC16C57T-RCE/SS is an 8-bit EPROM/ROM-based CMOS microcontroller from the PIC16C5X family, delivering 3KB (2K x 12) of One-Time Programmable (OTP) program memory in a 28-pin SSOP package supplied on tape and reel. It operates at up to 4MHz from a 2.5V to 5.5V supply, integrating 72 bytes of general-purpose RAM, a 12-bit wide instruction word, and a RISC architecture with 33 single-word/single-cycle instructions. The RCE speed grade and -40C to +125C extended operating range mark this part as automotive-qualified, suitable for under-hood and harsh-environment deployments. What is an 8-bit OTP microcontroller? It is a low-cost, Harvard-architecture processor with separate program and data buses, where program memory is one-time programmable (writeable once, not erasable). OTP MCUs sit within the broader category hierarchy of microcontroller -> embedded MCU -> semiconductor. They offer lower unit cost than flash-based counterparts while retaining firmware security (no in-circuit read-back) and high reliability, making them ideal for high-volume, fixed-function appliances and industrial controllers where firmware rarely changes. Key features include 20 I/O pins multiplexed across two ports, a programmable Timer0 8-bit counter with prescaler, watchdog timer with on-chip RC oscillator, power-on reset, power-saving SLEEP mode, and in-circuit serial programming compatibility. The 4MHz maximum clock frequency is derived from an external crystal, RC oscillator, or resonator; the static CMOS design allows clock speeds to be reduced to DC for ultra-low-power standby operation. Code protection bits prevent unauthorized firmware readback after OTP closure. The PIC16C5X core uses a 12-bit instruction word and a two-stage pipeline, executing one instruction per clock cycle (except branches which take two). This provides deterministic interrupt-free throughput well-suited to control loops, bit-banging protocols, and simple state machines. The 9-bit program counter can address up to 2K words (2K x 12 = 3KB) directly, with the OTP array programmed via Microchip's standard ICSP protocol. Typical applications include automotive body controllers, HVAC damper actuators, appliance timer boards, security PIR sensors, low-end remote controls, and industrial sensor interface modules. The extended automotive temperature grade (-40C to +125C) plus SSOP footprint makes it a strong fit for high-vibration, space-constrained modules where surface-mount reliability matters. When designing with this device, ensure your oscillator selection (crystal versus RC versus resonator) matches the chosen CLKOUT division mode, and allocate the MCLR pin properly for in-system reset. Note that OTP parts are programmed once at production; prototype builds typically use the windowed CERDIP -JW variant for repeated UV erasure cycles. Pricing reflects the tape-and-reel automotive qualification: expect 1k-unit pricing in the USD 4-6 range from franchised distributors. This page synthesizes datasheet specifications, current distributor pricing, and pin-compatible alternatives to give engineers an information-gain view beyond the manufacturer datasheet alone.

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PIC16C57T-RCI/SO - 8-Bit 4MHz OTP MCU 3KB | Microchip
PIC16C57T-RCI/SO

PIC16C57T-RCI/SO - 8-Bit 4MHz OTP MCU 3KB | Microchip

The Microchip Technology PIC16C57T-RCI/SO is an 8-bit RISC microcontroller from the PIC® 16C family, housed in a 28-pin SOIC package (0.295" / 7.50 mm body width) and supplied on tape and reel for surface-mount production. It integrates 3 KB of One-Time-Programmable (OTP) EPROM program memory organized as 2K x 12, executes instructions at up to 4 MHz (some variants quote 20 MHz maximum clock), and provides 20 general-purpose digital I/O pins suitable for compact embedded designs. A microcontroller (MCU) is a single-chip computer that combines a CPU, program memory, RAM, and peripherals on one die. The PIC16C5X family belongs to Microchip's foundational 8-bit PIC architecture - an early Harvard-architecture line widely adopted for cost-sensitive, deterministic, low-power control tasks. PIC microcontrollers sit within a hierarchy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC. The OTP variant allows one-time field programming, balancing unit cost against reprogrammability versus windowed (UV-erasable) or Flash parts. Key features of this part include 4 MHz operation (commercial oscillator variants run at 20 MHz), 20 GPIO, an internal RISC core with a small instruction set, an industrial operating temperature range of -40°C to +85°C, and a 28-SOIC industrial-grade package. The PIC16C57 series is built on a fully static CMOS process and is widely recognized for predictable, low-power behavior. The 'T' suffix indicates Tape & Reel packaging, while 'I' indicates the industrial temperature grade, and 'SO' specifies the 28-SOIC form factor. Typical applications include industrial appliance controls, simple sensor signal conditioning, motor-driver interfaces, low-cost consumer electronics, white-goods user interfaces, and replacement of legacy 8-bit logic with software-driven control. The wide supply voltage tolerance (typically 4.5 V to 5.5 V across the PIC16C5X family) supports battery- and mains-derived rails. When designing with OTP parts, ensure code is fully validated before programming - OTP parts cannot be reprogrammed or erased. For new designs, consider Flash-based successors (PIC16F series) for development flexibility.

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PIC16C57T-RCI/SS - 8-Bit 4MHz OTP MCU 28-SSOP | Microchip
PIC16C57T-RCI/SS

PIC16C57T-RCI/SS - 8-Bit 4MHz OTP MCU 28-SSOP | Microchip

The Microchip Technology PIC16C57T-RCI/SS is an 8-bit RISC microcontroller from the PIC16C5X family, featuring 3 KB (2K x 12) of One-Time-Programmable (OTP) program memory and 72 bytes of RAM, operating at 4 MHz in a 28-pin SSOP package. According to the Microchip datasheet, the PIC16C5X is a low-cost, high-performance, fully static EPROM/ROM-based CMOS microcontroller that employs a RISC architecture with 33 single-word/single-cycle instructions, delivering 12-bit wide instructions with 2:1 code compression over competing 8-bit microcontrollers in its class. An 8-bit microcontroller (MCU) is a single-chip computer containing a CPU, program memory, working RAM, I/O peripherals, and a clock generator on one die. It belongs to the broader hierarchy of embedded processors -> microcontrollers -> 8-bit MCU category -> CMOS RISC MCU -> PIC microcontrollers. The 8-bit segment targets cost-sensitive, deterministic, low-power embedded control and remains dominant in legacy industrial, appliance, and white-goods designs where simplicity, predictable interrupt latency, and ease of in-system programming outweigh the raw performance of 32-bit Cortex-M cores. Key features of the PIC16C57T-RCI/SS include 20 general-purpose digital I/O pins, an integrated Power-On Reset (POR), a Watchdog Timer (WDT) for code-flow safety, an industry-standard 4 MHz oscillator range (RC and crystal options), and a wide operating voltage range suitable for 5V systems. The RISC engine executes one instruction per oscillator cycle, and the small instruction set reduces development time while supporting tight C and assembly code density in 12-bit-wide OTP. The device targets fully static operation, allowing the clock to be stopped to save power without losing register state. Technically, the PIC16C5X architecture uses a Harvard memory layout separating program and data paths, a 2-level hardware stack for subroutines, and an 8-bit ALU with 8-bit-wide working registers. The 12-bit instruction word carries both opcode and immediate data, and 33 fixed-format instructions cover arithmetic, logical, bit-oriented, branch, and I/O operations. The OTP windowed package enables prototype and small-volume programming with an EPROM eraser. Typical applications include legacy appliance controls, small-form-factor consumer electronics, simple sensor interfaces, low-cost motor drivers, hobby/educational microcontroller boards, and pin-compatible upgrades for installed PIC16C5X sockets. Engineers often use this part as a cost-down replacement in designs originally qualified on the PIC16C5X family. When designing, note that OTP parts are one-time programmable only - code changes require a new device. Stocking strategy should account for the EOL/NRND status verified at the time of purchase. The 28-SSOP footprint is shared across the PIC16C5X family, easing cross-references. This page consolidates distributor pricing, drop-in alternatives from the PIC16C5X family and cross-brand options, pinout data, and design notes - information not collected in any single manufacturer document.

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PIC16C57T-XT/SO - 8-Bit 4MHz OTP MCU, 3KB | Microchip
PIC16C57T-XT/SO

PIC16C57T-XT/SO - 8-Bit 4MHz OTP MCU, 3KB | Microchip

The Microchip Technology PIC16C57T-XT/SO is an 8-bit EPROM/ROM-based CMOS microcontroller from the PIC® 16C family, featuring 3 KB (2K x 12) of One-Time-Programmable (OTP) program memory, 72 bytes of RAM, and a maximum clock speed of 4 MHz (XT oscillator). Housed in a 28-pin SOIC (7.50 mm body width, 'SO' suffix) package, the part operates from a 5 V supply. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data memory, and programmable I/O peripherals. The PIC16C5X family uses a 12-bit wide instruction word with Harvard architecture (separate program and data buses), achieving roughly 2:1 code compression over typical 8-bit microcontrollers in its class. Within the broader taxonomy, the PIC16C57 belongs to the OTP-microcontroller segment of the 8-bit MCU category, sitting between mask-ROM and Flash-based parts on the cost/flexibility curve. Key differentiating features include the 4 MHz top operating frequency from an XT (crystal/ceramic resonator) oscillator, 20 I/O pins with individual direction control, a watchdog timer, a power-on reset circuit, and a programmable code-protection mechanism. The OTP program memory allows prototype-to-production migration without tooling charges that mask ROM parts require, while the 28-pin SOIC footprint is compatible with standard SMT assembly lines. The PIC16C57T-XT/SO uses a RISC-like instruction set of 33 single-word/cycle instructions, an 8-bit ALU with internal accumulator, and a 2-level hardware stack. Peripherals include Timer0 (8-bit with prescaler), real-time clock/counter mode, and direct/indirect addressing modes for accessing the 72-byte data RAM. Typical applications include appliance control, HVAC thermostat logic, simple sensor interfaces, automotive body controllers (non-safety), and legacy industrial automation. Designers choose this part when low unit cost, deterministic instruction timing, and a small footprint outweigh the need for in-system reprogrammability. When designing with this device, ensure the XT-mode crystal or resonator value falls within the 4 MHz maximum and verify timing budget margins across the full -40 °C to +70 °C commercial operating range. OTP parts cannot be reprogrammed after encapsulation, so use a windowed/EPROM variant for prototyping. This page synthesizes distributor pricing, drop-in same-package alternatives (including PIC16C57T family members from Microchip), and practical design considerations not consolidated in a single manufacturer datasheet view.

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PIC16C57T-XTE/SO - 8-Bit 4MHz OTP MCU 3KB | Microchip
PIC16C57T-XTE/SO

PIC16C57T-XTE/SO - 8-Bit 4MHz OTP MCU 3KB | Microchip

The Microchip Technology PIC16C57T-XTE/SO is an 8-bit RISC microcontroller from the PIC® 16C family, operating at up to 4 MHz with a nominal 1 MHz instruction rate. It integrates 3 KB (2K x 12) of One-Time Programmable (OTP) program memory, 72 bytes of data RAM, and 20 I/O pins, all housed in a 28-pin SOIC (7.50 mm width) surface-mount package. The "T" suffix indicates tape-and-reel packaging, and the "XTE" speed/temperature code denotes an extended-temperature-grade device. A microcontroller (MCU) is a single-chip computer that contains a CPU, memory, and programmable I/O peripherals on one integrated circuit. The PIC16C5X family is a classic CMOS EPROM/ROM-based 8-bit architecture that delivers RISC performance in an order of magnitude higher than its competitors in the same price category. Its 12-bit-wide instructions are highly symmetrical, resulting in 2:1 code compression over other 8-bit microcontrollers in its class - meaning each instruction performs more useful work per byte of program memory. Key features include a 33-instruction set with 12-bit opcode width, two 8-bit timer/counters, a watchdog timer with on-chip RC oscillator for reliable recovery, and a power-on reset circuit. The device supports 20 bidirectional digital I/O pins with high-current sink/source capability for direct LED drive, plus a 4 MHz maximum clock input with a four-phase internal clock generator. Power consumption is minimized through CMOS technology and a SLEEP mode that draws microamp-level standby current. The PIC16C57T architecture uses a Harvard design with separate program and data buses, allowing instruction fetch and operand read to occur in a single cycle. This RISC pipeline is the source of the family's hallmark 1 MIPS/MHz throughput, enabling deterministic interrupt response and predictable execution timing for real-time control loops. The OTP memory is programmed once via standard Microchip development tools and cannot be erased, making the part ideal for fixed-function, cost-sensitive production designs. Typical applications include appliance control, HVAC fan and valve drivers, simple sensor interfaces, automotive sub-system controllers (non-safety), consumer electronics keypads, and industrial timer/sequencer logic. The combination of low cost, small footprint, and legacy code compatibility keeps the PIC16C5X in active production for migration of mature designs. When designing with this MCU, ensure the oscillator configuration matches the application: RC mode for cost-sensitive designs, crystal/ceramic resonator for clock accuracy, and external clock for multi-chip synchronization. The MCLR reset pin must be pulled high through a resistor for normal operation, and unused I/O pins should be configured as outputs to minimize quiescent current draw. This page synthesizes current distributor pricing, drop-in alternative identification, and practical design notes not consolidated in the manufacturer datasheet - data refreshed as of 2026-09-17 from DigiKey, Mouser, Octopart, and the official Microchip product listing.

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PIC16C57T-XTE/SS - 8-Bit 3KB OTP MCU 28-SSOP | Microchip
PIC16C57T-XTE/SS

PIC16C57T-XTE/SS - 8-Bit 3KB OTP MCU 28-SSOP | Microchip

The Microchip Technology PIC16C57T-XTE/SS is an EPROM/ROM-based 8-bit CMOS microcontroller from the PIC16C5X family, offering 3 KB of One-Time Programmable (OTP) program memory organized as 2K x 12, packaged in a 28-pin Shrink Small-Outline Package (SSOP) with 5.30 mm body width. The device runs at 4 MHz maximum clock speed, is specified for 5 V operation, and is supplied in Tape & Reel packaging for high-volume assembly. The 'T' suffix indicates tape and reel orientation, 'XT' denotes the oscillator range and frequency grade, and 'E' indicates the extended commercial operating temperature range. An 8-bit microcontroller (MCU) is a single-chip computer containing a CPU, program memory, data RAM, I/O ports, and peripherals on one die. The PIC16C5X family belongs to the original baseline PIC architecture, one tier below Mid-Range PIC16 devices, and sits inside the broader 8-bit MCU category alongside 8051 and AVR. The PIC16C5X delivers 12-bit wide instructions with high symmetry, achieving 2:1 code compression over competitive 8-bit MCUs in the same price class, while its RISC instruction set reduces development time. Key features of the PIC16C57T-XTE/SS include 72 bytes of general-purpose RAM, 20 I/O pins, a 12-bit instruction word, 2-level hardware stack, single 8-bit timer (TMR0), watchdog timer, and power-on reset. The device uses a Harvard architecture with separate program and data buses, executes one instruction per internal clock cycle (4 oscillator cycles per instruction), and supports 33 single-word instructions. Power-saving SLEEP mode and selectable oscillator options (RC, XT, HS, LP) are available depending on the device variant. Typical applications include low-cost embedded control in consumer appliances, automotive subsystems (body controllers, sensor interfaces), industrial control, smart sensors, and battery-powered devices. The extended operating temperature range supports demanding environments, and the small SSOP footprint makes it suitable for space-constrained PCB designs. Its low cost and deterministic interrupt handling make the PIC16C57 family a common choice for high-volume legacy designs. When designing with the PIC16C57T-XTE/SS, ensure the chosen oscillator mode (XT) matches the external crystal or resonator, place decoupling capacitors close to VDD/VSS pins, and use the MCLR reset pin with the recommended 10 kohm pull-up for proper reset behavior. Note that OTP memory can only be programmed once - consider PIC16F or PIC16C variants with UV-erasable EPROM if code iteration is required. This page synthesizes distributor pricing, drop-in Microchip baseline alternatives, and practical design notes not consolidated in a single manufacturer datasheet document.

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PIC16C58B-04/P - 8-Bit 4MHz OTP MCU 3KB | Microchip
PIC16C58B-04/P

PIC16C58B-04/P - 8-Bit 4MHz OTP MCU 3KB | Microchip

The Microchip Technology PIC16C58B-04/P is an 8-bit EPROM/ROM-based CMOS microcontroller in the PIC16C5X family, delivering 4 MHz CPU performance with 3KB (2K x 12) of One-Time-Programmable (OTP) program memory in a 18-pin PDIP (0.300 inch, 7.62 mm) through-hole package. According to the PIC16C58B datasheet, the device ships with 73 bytes of RAM, 12 I/O pins, and a 12-bit-wide instruction word with single-cycle execution. What is an 8-bit OTP microcontroller? An 8-bit OTP microcontroller is a small, self-contained computer-on-a-chip built around an 8-bit data path, with non-volatile program memory that can be written exactly once. OTP parts sit in the hierarchy: microcontroller -> embedded controller -> semiconductor IC, and they belong to the broader class of microcontrollers (MCU) which also includes Flash-based and ROM-based variants. The OTP nature of the PIC16C58B makes it suited for low-to-medium volume production where mask-ROM economics are not yet justified. Key features include 33 single-word single-cycle RISC instructions, a two-level deep hardware stack, 8-bit real-time clock/counter (TMR0), direct/indirect/relative addressing modes, and a Watchdog Timer with on-chip RC oscillator for reliable operation. The wide operating voltage range of 2.5V to 6.0V (with the -04 speed grade optimized at 4 MHz) and CMOS low-power architecture enable battery-friendly designs. All PIC16C5X family members are fully static, allowing the clock to be stopped without losing register contents. Architecturally, the PIC16C58B uses a Harvard architecture with separate program and data buses, plus a 12-bit instruction word that delivers approximately 2:1 code compression versus competing 8-bit MCUs in its class. Seven or eight special-function hardware registers provide all CPU state, and the EPROM-based program memory (windowed for prototype JW parts, opaque for production OTP) is programmed via Microchip's standard serial programming interface. Typical applications include low-cost consumer appliances, automotive body controllers, industrial timers, sensor signal conditioners, simple motor control loops, and battery-powered remote controllers where the PIC16C58B's small footprint, low cost, and deterministic interrupt-free execution provide an attractive BOM reduction. The 12 I/O pins are sufficient for keypad scanning, LED multiplexing, and basic serial-bit-banged interfaces. When designing with this part, note that the PIC16C5X family lacks interrupts; all I/O servicing must be polled. Code protection is provided via EPROM fuse bits - enable CP mode for production firmware confidentiality. Use Microchip's MPASM assembler and PICSTART Plus or PICkit 1 programmers for development. This page synthesizes distributor pricing, drop-in compatible alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C58B-04/SO - 4MHz 8-Bit OTP MCU, 3KB | Microchip
PIC16C58B-04/SO

PIC16C58B-04/SO - 4MHz 8-Bit OTP MCU, 3KB | Microchip

The Microchip Technology PIC16C58B-04/SO is a low-cost, high-performance 8-bit fully-static EPROM/OTP-based CMOS microcontroller in the PIC16C5X family, housed in an 18-pin SOIC (SO) package and operating at a maximum clock speed of 4 MHz. It integrates 3 KB of program memory (2K x 12 OTP), 73 bytes of RAM, 12 I/O pins, an 8-bit timer/counter (TMR0), and a two-level deep hardware stack, providing a complete RISC-based control engine in a compact surface-mount footprint. A PIC16C5X microcontroller is a member of the 8-bit microcontroller family that uses a RISC architecture with only 33 single-word, single-cycle instructions, providing 2:1 code compression over other 8-bit microcontrollers in its class. All instructions execute in a single instruction cycle (200 ns at 20 MHz) except for program branches which take two cycles, enabling predictable deterministic control. The architecture includes seven or eight special-function hardware registers, direct/indirect/relative addressing modes, and a watchdog timer for reliable unattended operation. Key features include the 4 MHz oscillator (the -04 speed grade), brown-out detection support, an 8-bit real-time clock/counter (TMR0) with 8-bit prescaler, power-on reset, and an operating voltage range of 2.5 V to 5.5 V. The OTP (one-time-programmable) program memory allows factory or field programming using a standard device programmer, while the SOIC-18 package supports hand-solderable surface-mount assembly. The wide VDD range and CMOS design also deliver extremely low power consumption, with typical supply current under 2 mA at 5 V/4 MHz and standby current in the microamp range. The device uses a Harvard architecture with separate code and data buses, a 12-bit wide instruction word, and an 8-bit wide data path. The 12 I/O pins are bidirectional with individually programmable direction registers, and several pins can be configured for alternate functions such as TMR0 clock input, interrupt, or device reset. This architecture is field-proven in millions of low-cost embedded products and is supported by a mature toolchain including MPLAB IDE, MPASM assembler, and ICD/debug tools. Typical applications include consumer appliance controls, simple sensor interfaces, LED driver controllers, battery chargers, automotive body electronics, industrial timers and counters, and low-cost replacement of discrete logic. The 4 MHz speed grade is well-suited to sub-1 MIPS control tasks where deterministic response and minimal BOM cost matter more than raw throughput. When designing with this device, the OTP memory must be programmed before final assembly using a compatible device programmer such as MPLAB PM3 or PICSTART Plus. Because OTP parts cannot be reprogrammed in-circuit, firmware validation should be performed on a JW or windowed version during development. The wide operating voltage (2.5 V to 5.5 V) allows direct connection to both 3.3 V and 5 V systems without level shifters. This page synthesizes distributor pricing, parametric comparison with same-family and cross-brand drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, helping engineers source and qualify the part for production.

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PIC16C58B-04/SS - 8-bit 4MHz OTP MCU 3KB 20-SSOP | Microchip
PIC16C58B-04/SS

PIC16C58B-04/SS - 8-bit 4MHz OTP MCU 3KB 20-SSOP | Microchip

The Microchip Technology PIC16C58B-04/SS is an 8-bit, fully static, EPROM/OTP-based CMOS microcontroller in the PIC16C5X family, operating at up to 4 MHz and housed in a 20-pin SSOP (5.30 mm) package. The device integrates 3 KB of OTP program memory (organized as 2K x 12 words), 73 bytes of RAM, 12 digital I/O pins, and a single 8-bit timer/counter (TMR0) with an 8-bit prescaler, all executing from a RISC architecture that delivers 33 single-word, single-cycle instructions. An 8-bit microcontroller (MCU) is a small, self-contained computer-on-a-chip integrating a CPU, RAM, non-volatile program memory, and peripherals on a single die. OTP (One-Time Programmable) MCUs use EPROM cells that can be written once by a programmer and are ideal for low-cost, moderate-volume production where in-field firmware updates are not required. Within the broader taxonomy, this part sits as MCU -> 8-bit microcontroller -> embedded controller -> semiconductor, and belongs to Microchip's classic PIC16C5X baseline family, the simplest tier of the PIC architecture hierarchy. Key features include a 12-bit instruction word, two-level deep hardware stack, direct/indirect/relative addressing modes, 8-bit real-time clock/counter (TMR0), programmable code protection, and a wide operating voltage range from 2.5 V to 6.0 V (datasheet extends to 3.0 V to 5.5 V for the OTP variants). The 20-SSOP package supports surface-mount assembly and is well suited to compact board designs in consumer, appliance, and industrial-control applications. Architecturally, the PIC16C5X uses a Harvard-style RISC core with separate program and data buses, allowing instruction fetch and operand access in the same cycle. The 12-bit instruction width produces approximately 2:1 code compression over typical 8-bit CISC MCUs, reducing program-memory consumption for the same functional task. The device supports RC, XT, LP, and HS oscillator modes, providing flexibility for cost-sensitive crystal designs as well as low-power 32 kHz watch-crystal operation. Typical applications include low-cost remote controls, appliance controls, automotive subsystems (non-safety), battery chargers, and simple sensor interfaces. The combination of small footprint, modest memory, and broad peripheral support makes this part a long-standing workhorse for legacy embedded designs where deterministic execution and minimal BOM cost are priorities. When designing with this MCU, note that the PIC16C5X core has a two-level hardware stack and no interrupts; interrupt-driven code must be written by polling. Always place a 0.1 uF decoupling capacitor within 5 mm of VDD and use a bulk capacitor on the MCLR/VPP reset line to ensure clean power-up behavior. This page synthesizes distributor pricing, SSOP drop-in alternatives within the PIC16C5X family, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C58B-04E/SO - 8-bit 4MHz 3KB EPROM MCU SOIC-18 | Microchip
PIC16C58B-04E/SO

PIC16C58B-04E/SO - 8-bit 4MHz 3KB EPROM MCU SOIC-18 | Microchip

The Microchip Technology PIC16C58B-04E/SO is an 8-bit RISC microcontroller from the PIC16C5X family, delivering 4 MHz CPU performance with 3 KB (2K x 12) of one-time-programmable (OTP) EPROM program memory and 73 bytes of RAM in a 18-pin SOIC package. It operates from a 3.0 V to 5.5 V supply across an industrial -40 °C to +125 °C temperature range, and exposes 12 digital I/O lines organized across two ports (PORTA 6-bit, PORTB 4-bit). The /04 speed grade specifies a 4 MHz oscillator and 250 ns instruction cycle, while the 'E' suffix denotes the extended industrial temperature grade and 'SO' denotes the 7.50 mm wide 18-SOIC gull-wing package supplied in tube. An 8-bit PIC microcontroller is a low-cost, fully-static CMOS processor that fetches 12-bit-wide instructions from on-chip program memory and executes them in a single instruction cycle through a RISC pipeline. It belongs to the broader family of embedded microcontrollers, which sit below microprocessors in complexity but above discrete logic in integration, providing on-chip program memory, data RAM, I/O, and a timer in a single chip. The PIC16C5X architecture uses a 12-bit instruction word that yields a typical 2:1 code compression versus competitors in its class, allowing the same source program to fit in roughly half the program memory compared with traditional 8-bit CISC architectures. Key features of the PIC16C58B-04E/SO include 33 single-word/single-cycle instructions, a hardware 8-bit timer/counter (TMR0) with optional programmable prescaler, a watchdog timer with its own on-chip RC oscillator for reliable reset, power-on reset, brown-out detection via the power-up timer, and an in-circuit serial programming capability through the RB6/RB7 pins on selected package variants. Sleep mode with wake-on-pin-change provides microamp-level standby current, and the device's fully static design allows the oscillator to be stopped without losing internal state. In typical embedded applications the PIC16C58B-04E/SO is used to read buttons or sensors, drive LEDs or relays, and implement low-speed serial protocols through software bit-banging. Its compact footprint, OTP programmability, and extended temperature range suit it for automotive body modules, appliance control boards, and industrial sensor interfaces where a small code footprint and predictable timing matter more than large memory or high I/O count. When laying out a board for this part, place a 100 nF decoupling capacitor within 5 mm of the VDD pin and tie VSS through a low-impedance plane. Reserve RB6 and RB7 for in-circuit serial programming if you intend to reprogram the device after soldering, because the SOIC package has no debug header. Designers should keep total source current below 90 mA and sink current below 90 mA across all I/O to stay within package power-dissipation limits. This page synthesizes distributor pricing snapshots, same-family drop-in alternatives, and practical design notes not found in the Microchip datasheet.

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PIC16C58B-04E/SS - 8-Bit 4MHz OTP MCU | Microchip
PIC16C58B-04E/SS

PIC16C58B-04E/SS - 8-Bit 4MHz OTP MCU | Microchip

The Microchip Technology PIC16C58B-04E/SS is an 8-bit RISC EPROM/OTP-based CMOS microcontroller in the PIC16C5X family, operating at a maximum clock speed of 4 MHz and delivering 3 KB (2K x 12) of one-time-programmable program memory in a 20-pin SSOP surface-mount package. The device implements a Harvard RISC architecture with only 33 single-word/single-cycle instructions, providing 2:1 code compression over competing 8-bit microcontrollers in its class, and uses 12-bit wide instructions. An 8-bit OTP microcontroller (One-Time-Programmable microcontroller) is a compact computing device that integrates a CPU, non-volatile EPROM program memory, RAM, and peripherals on a single CMOS die. Unlike flash-based MCUs, OTP memory can be programmed exactly once and is favored for low-cost, high-volume embedded products where firmware is finalized at production. The PIC16C5X sits at the entry-level node of the 8-bit microcontroller hierarchy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor, making it the lowest-cost member of the Microchip PIC family. Key features of the PIC16C58B-04E/SS include an operating voltage range of 3.0 V to 5.5 V, an extended industrial operating temperature range of -40 °C to +125 °C (E suffix), on-chip Power-On Reset (POR), a Watchdog Timer (WDT) with dedicated on-chip RC oscillator, and a 12-bit-wide instruction set with 33 single-cycle instructions. The device supports DC to 4 MHz clock input, has 8-level hardware stack, and offers low-power CMOS operation. The 20-SSOP package follows the SSOP family -> surface mount -> SMD hierarchy. The PIC16C58B-04E/SS uses Microchip's classic 14-bit instruction core scaled to a 12-bit opcode for the PIC16C5X baseline architecture, providing deterministic single-cycle execution except for program branches which take two cycles. Internal 8-bit data paths feed 25 to 73 bytes of general-purpose RAM depending on configuration, while the 3 KB EPROM stores up to 2048 12-bit instructions, ample for simple control loops, timing logic, and glue-replacement tasks. Typical applications include automotive body electronics and appliance control subsystems, low-cost consumer white goods, industrial sensor interfaces, LED driver controllers, and remote control transmitters. Designers choose this part when the lowest unit cost and proven long-term availability outweigh the need for in-system reprogrammability. The E temperature grade extends operating range from -40 °C to +125 °C, supporting under-hood automotive and industrial cabinet environments. When designing with the PIC16C58B-04E/SS, note that OTP memory cannot be erased or rewritten, so firmware must be fully validated on a compatible windowed or flash prototype (e.g., PIC16F58) before committing to OTP programming. The -04 speed suffix denotes 4 MHz maximum oscillator input; do not substitute with -10 or -20 parts when the PCB layout does not match. The 'E' suffix denotes the extended -40 °C to +125 °C temperature range required for many automotive and industrial specifications. This page synthesizes distributor pricing, drop-in OTP MCU alternatives, and practical design notes (POR, WDT, oscillator selection) not aggregated in the manufacturer datasheet.

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PIC16C58B-04I/P - 8-Bit 4MHz OTP MCU 18-PDIP | Microchip
PIC16C58B-04I/P

PIC16C58B-04I/P - 8-Bit 4MHz OTP MCU 18-PDIP | Microchip

The Microchip Technology PIC16C58B-04I/P is an 8-bit, fully-static, EPROM/OTP-based CMOS microcontroller from the PIC16C5X family, operating at up to 4 MHz and packaged in a 18-pin PDIP (300 mil) through-hole format. The device integrates 3KB (2K x 12) of One-Time-Programmable program memory, 73 bytes of RAM, and 12 digital I/O pins organized into bidirectional ports. What is a PIC16C5X microcontroller? The PIC16C5X is Microchip's entry-level 8-bit RISC microcontroller family, employing a Harvard architecture with a 12-bit instruction word and an 8-bit data path. It executes 33 single-word, single-cycle instructions, giving it a 2:1 code compression advantage over competing 8-bit microcontrollers in its class. The family sits below PIC16F and PIC18 in the Microchip hierarchy, targeting cost-sensitive embedded control applications where deterministic timing and small footprint dominate over computational throughput. Key features include a two-level deep hardware stack, direct/indirect/relative addressing modes, an 8-bit real-time clock/counter (TMR0) with programmable prescaler, and a watchdog timer for reliable standalone operation. Power consumption is minimized via SLEEP mode with wake-on-pin-change, and the device operates from 3.0V to 5.5V across the industrial -40C to +85C temperature range. The 'I' suffix denotes the industrial temperature grade. The PIC16C58B uses CMOS EPROM technology with 12-bit wide instructions and 8-bit wide data, achieving performance an order of magnitude higher than competitors in the same price category. Its OTP program memory is one-time programmable (not re-programmable in-circuit), distinguishing it from later flash-based PIC16F variants. The architecture is fully static, allowing the clock to be stopped without losing register contents. Typical applications include low-cost consumer appliances, remote controls, toy and hobby electronics, simple sensor interfaces, LED driving and lighting controllers, security keypads, and battery-powered devices. Designers select this part when determinism, small code size, and aggressive cost matter more than abundant peripherals. When designing with the PIC16C58B-04I/P, ensure the OTP programming step is integrated into the production flow - field firmware updates are not possible. Add a 100 nF decoupling capacitor adjacent to VDD and use the MCLR pin reset configuration with the internal pull-up enabled to reduce external component count. This page synthesizes distributor availability, same-package drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16C58B-04I/SS - 8-bit EPROM MCU 4MHz 20-SSOP | Microchip
PIC16C58B-04I/SS

PIC16C58B-04I/SS - 8-bit EPROM MCU 4MHz 20-SSOP | Microchip

The Microchip Technology PIC16C58B-04I/SS is an 8-bit CMOS EPROM-based microcontroller built on the PIC16C5X RISC core, delivering up to 4 MHz instruction throughput in a 20-pin SSOP (Shrink Small Outline Package) tube-format housing. The device integrates 3 KB of one-time-programmable (OTP) EPROM program memory organized as 2K x 12, 73 bytes of general-purpose RAM, and 12 bidirectional digital I/O pins across a 5 V single-rail power domain. An 8-bit microcontroller (MCU) is a single-chip computer optimized for embedded control tasks. The PIC16C5X family specifically targets low-cost, high-volume applications using a Reduced Instruction Set Computing (RISC) architecture with only 33 single-word, single-cycle instructions, giving it a deterministic 4-clock equivalent instruction cycle at 4 MHz. Within the broader semiconductor taxonomy, MCUs sit below microprocessors in integration and are categorized as: MCU -> 8-bit microcontroller -> PIC16 family -> EPROM-based PIC16C5X subfamily -> CMOS OTP/ROM controller. Key features include a 12-bit wide instruction word with 8-bit wide data path, two-level deep hardware stack, direct/indirect/relative addressing modes for both data and instructions, and an 8-bit real-time clock/counter (TMR0) with 8-bit prescaler. The device also incorporates a watchdog timer with on-chip RC oscillator, power-on reset, and power-saving SLEEP mode. A 4 MHz maximum oscillator frequency keeps power consumption low for always-on or battery-tolerant designs. Technically, the PIC16C58B uses a fully static CMOS process allowing clock frequencies down to DC, supporting low-power sleep modes useful for energy-harvesting or interrupt-driven applications. The 12-bit instruction width provides 2:1 code compression versus competing 8-bit CISC architectures, allowing the 3 KB OTP memory to host more application code than byte-oriented equivalents of similar size. Typical applications include low-cost consumer appliances, automotive sub-system controllers, industrial timing and sequencing logic, remote sensor interface boards, and user-interface panels where the 12 I/O pins and small SSOP footprint are sufficient. The wide operating temperature range makes the part viable for both indoor and harsh-environment deployments. When designing with this device, engineers should note that OTP EPROM cannot be re-programmed in-circuit, so development typically uses a windowed CERDIP sample (PIC16C58B JW) or a Flash-based PIC16F5X equivalent for code iteration. The lack of an on-chip debugger interface means emulator or ICE tools are required for stepping debug. This page synthesizes distributor stock and pricing, parametric drop-in alternatives, and application-focused design notes not found in a single source on the manufacturer datasheet.

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PIC16C58B-20/P - 8-Bit 20MHz 3KB OTP MCU 18-PDIP | Microchip
PIC16C58B-20/P

PIC16C58B-20/P - 8-Bit 20MHz 3KB OTP MCU 18-PDIP | Microchip

The Microchip Technology PIC16C58B-20/P is a member of the PIC16C5X family of low-cost, high-performance, 8-bit fully-static EPROM/ROM-based CMOS microcontrollers. It integrates 3KB (2K x 12) of One-Time-Programmable (OTP) program memory, 73 bytes of RAM, and 12 I/O pins in an 18-pin PDIP through-hole package. The device operates at a maximum clock frequency of 20 MHz, delivering a 200 ns instruction cycle through Microchip's RISC architecture with only 33 single-word/single-cycle instructions. A microcontroller (MCU) is a single-chip computer that contains a processor core, memory, and programmable input/output peripherals, designed for embedded control applications. Within the semiconductor hierarchy, MCUs sit under microcontrollers -> embedded processors -> logic ICs -> integrated circuits. The PIC16C5X family specifically targets cost-sensitive applications where deterministic execution and minimal external component count are valued over absolute computational throughput. Key features include a two-level deep hardware stack, direct/indirect/relative addressing modes for both data and instructions, an 8-bit real-time clock/counter (TMR0), and a watchdog timer for reliable operation. The Harvard-style 12-bit instruction word and 8-bit data path yield 2:1 code compression over competing 8-bit architectures. Power-fail reset, brown-out detection, and a wide operating voltage range (typically 2.5V to 5.5V for the 'B' revision) make the part suitable for battery-powered and industrial environments. Typical applications include appliance control, sensor signal conditioning, LED lighting controllers, automotive subsystems (non-safety-critical), and low-cost consumer electronics. The OTP memory allows prototype-to-production migration within the same pinout, reducing time-to-market for short-run or field-programmed designs. When designing with this device, note that OTP parts can be programmed only once — for iterative development use a windowed (JW) or flash-based sibling such as PIC16F58A. Decoupling capacitors (0.1 uF) should be placed close to VDD, and unused I/O pins must be configured as outputs to minimize current draw. This page synthesizes distributor stock and pricing (as of 2026-09-17), cross-package-aware drop-in alternatives from the same PIC16C5X family, and practical design notes that go beyond the manufacturer datasheet's typical-application circuit.

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PIC16C58B-20/SO - 8-Bit 20MHz OTP MCU 3KB ROM | Microchip
PIC16C58B-20/SO

PIC16C58B-20/SO - 8-Bit 20MHz OTP MCU 3KB ROM | Microchip

The Microchip Technology PIC16C58B-20/SO is an 8-bit ROM-based CMOS microcontroller from the PIC16C5X family, delivering 20 MHz CPU performance, 3 KB of one-time-programmable (OTP) program memory (2K x 12), 73 bytes of RAM, and 12 I/O pins in an 18-pin SOIC package. It is built on a RISC architecture with 33 single-word/single-cycle instructions, providing roughly 2:1 code compression versus other 8-bit microcontrollers in its class. 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. In the wider system hierarchy, an 8-bit MCU sits below 16-bit and 32-bit microcontrollers and is the optimal cost point for embedded control tasks such as appliance timers, sensor signal conditioning, simple motor drivers, and human-interface panels where deterministic response and small code size matter more than throughput. Key features of the PIC16C58B-20/SO include a two-level deep hardware stack for subroutine nesting, direct/indirect/relative addressing modes, an 8-bit real-time clock/counter (TMR0) with programmable prescaler, seven or eight special-function hardware registers, and a watchdog timer for reliable unattended operation. The wide 2.0 V to 6.0 V operating range (5 V nominal) lets it ride through brownouts in industrial environments, and the fully static CMOS design eliminates the minimum clock-frequency constraint of older NMOS parts. The PIC16C5X uses a 12-bit-wide instruction word that is highly orthogonal, so most operations can use any register as a source and any W-register or file register as a destination. The result is compact code: typical applications fit easily in the 2K-word program space, leaving headroom for product feature growth. The B-suffix part is an enhanced revision of the original PIC16C58 with lower power and a more robust oscillator structure. Typical applications include consumer appliance control, battery chargers, simple sensor interfaces, security keypads, low-end remote controls, and white-goods user interfaces where the PIC16C58B-20/SO's small code footprint and 12 I/O pins provide ample connectivity for relays, LEDs, and a matrix keypad. Its commercial temperature grade (0 °C to +70 °C) suits indoor equipment. When designing with this part, budget oscillator start-up time carefully and place decoupling within 5 mm of VDD. The OTP program memory means firmware cannot be field-updated, so engineering samples and pre-production builds should be verified on a flash-based PIC16F equivalent before committing to OTP volume. Always derate the oscillator selection for the chosen crystal's load capacitance. This page synthesizes distributor pricing from DigiKey, Mouser, LCSC and Octopart, together with drop-in alternative analysis and practical design notes that go beyond the manufacturer datasheet summary.

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PIC16C58B-20/SS - 8-bit OTP MCU, 20MHz, 3KB ROM, SSOP-20
PIC16C58B-20/SS

PIC16C58B-20/SS - 8-bit OTP MCU, 20MHz, 3KB ROM, SSOP-20

The Microchip Technology PIC16C58B-20/SS is an 8-bit CMOS microcontroller from the PIC16C5X family, offering 3 KB of one-time-programmable (OTP) ROM, 73 bytes of RAM, and 12 I/O pins in a 20-pin SSOP (Shrink Small Outline Package) gull-wing surface-mount package. Operating from a 4.5 V to 5.5 V supply at up to 20 MHz, this commercial-temperature-grade device is designed for cost-sensitive embedded control applications requiring a small footprint and low power consumption. Key features include a RISC architecture with only 33 single-word, single-cycle instructions (all instructions are single-cycle except for program branches, which take two cycles), a two-level deep hardware stack, and direct, indirect, and relative addressing modes for both data and instructions. An 8-bit real-time clock/counter (TMR0) is included, and the device provides an 8-bit wide data path with 12-bit wide instructions for code density. The PIC16C58B is part of Microchip's PIC16C5X family, a lineage of low-cost, high-performance, fully static, EPROM/ROM-based CMOS microcontrollers. As a member of the OTP subset, the PIC16C58B is suitable for low-to-medium-volume production where flash re-programmability is not essential. Its compact code footprint (only 33 instructions to learn) and deterministic instruction timing make it attractive for simple state-machine replacement, timer/counter applications, and battery-operated or hand-held devices that need predictable behavior without complex firmware ecosystems. Typical applications include consumer white goods control, low-cost remote-control transmitters, sensor signal conditioning front-ends, simple user-interface controllers (button scanning, LED multiplexing), and replacement of discrete logic or 74-series glue in space-constrained boards. The SSOP-20 footprint allows dense PCB placement while remaining hand-solderable for prototypes. When designing with this device, note that the PIC16C5X core lacks interrupts (a key architectural difference from the PIC16F and PIC18 families), so all event handling must be polled. OTP memory means firmware must be finalized before production, and code-protection fuses should be set at programming time to prevent unauthorized read-out of the ROM contents.

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PIC16C58B-20E/SO - 8-bit 20MHz 3KB OTP MCU | Microchip | SOIC-18
PIC16C58B-20E/SO

PIC16C58B-20E/SO - 8-bit 20MHz 3KB OTP MCU | Microchip | SOIC-18

The Microchip Technology PIC16C58B-20E/SO is an 8-bit EPROM/ROM-based CMOS microcontroller belonging to the PIC16C5X family, housed in an 18-pin SOIC (SO) package with a maximum clock speed of 20 MHz. It integrates 3KB of program memory (2K x 12 OTP), 73 bytes of RAM, and 12 I/O pins, all driven by a RISC architecture with 33 single-word single-cycle instructions. Operating from a 4.5V to 5.5V single supply, the part is engineered for high-performance, low-cost embedded control. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals. The PIC16C5X family sits at the entry-level of 8-bit microcontrollers, descendants of the original PIC architecture that pioneered Harvard-bus RISC design for embedded control. Within the broader taxonomy, the PIC16C58B is a micro-controller -> MCU -> 8-bit MCU -> RISC MCU -> embedded processor -> semiconductor. Its 12-bit wide instruction word delivers 2:1 code compression over competing 8-bit architectures, allowing tight programs to fit in the small OTP memory. Key features include a fully static design that permits operation down to DC clock, an internal oscillator option, and a programmable code-protection mechanism. The 20 MHz instruction rate yields 5 MIPS peak throughput, while the 33-instruction set simplifies code generation and reduces firmware development time. The wide 20-pin SOIC industrial package provides robust mechanical handling and easy hand-soldering for prototyping. Typical applications include appliance controls, automotive body electronics (non-safety), security-system sensor interfaces, and industrial machine-control sub-modules. The 12-bit program-word width and 73-byte RAM make the PIC16C58B well-suited for state-machine-driven glue logic where deterministic single-cycle execution replaces discrete logic. Because the device is OTP-based, production programming occurs once per unit. When designing with this part, allow up to 73 bytes of general-purpose RAM and verify that the chosen oscillator mode (RC, XT, HS, LP) matches the frequency and stability required by the application. Always confirm whether OTP or windowed-EPROM (JW) packaging is appropriate for your firmware-development workflow, as windowed parts cost more and are larger.

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PIC16C58B-20E/SS - 8-bit OTP MCU, 3KB, 20MHz, SSOP-20
PIC16C58B-20E/SS

PIC16C58B-20E/SS - 8-bit OTP MCU, 3KB, 20MHz, SSOP-20

The Microchip Technology PIC16C58B-20E/SS is an 8-bit CMOS microcontroller from the PIC16C5X family, featuring a RISC architecture with 33 single-word, single-cycle instructions, 3KB (2K x 12) of One-Time Programmable (OTP) program memory and 73 bytes of RAM, operating up to 20MHz at 5V in a 20-pin SSOP package. The 'E' suffix denotes the extended industrial temperature grade of -40C to +125C, and 'SS' indicates the SSOP-20 (5.30mm body width, 0.65mm pitch) surface-mount package. An 8-bit PIC microcontroller is a compact, deterministic processor based on a Harvard architecture with separate program and data paths, optimised for low cost, low power, and fast interrupt response. The PIC16C5X sub-family belongs to Microchip's baseline 8-bit MCU portfolio and is positioned beneath the PIC16F and PIC18F families in the broader Microchip 8-bit taxonomy (8-bit PIC -> baseline PIC -> PIC16C5X). The 12-bit-wide instruction word delivers roughly 2:1 code compression versus competitors in the same class, allowing the 2K-word setup memory to address more complex application logic than an 8-bit-instruction, 2K-byte baseline MCU. Key features of the PIC16C58B include 12 I/O pins multiplexed across PORTA and PORTB, an 8-bit timer/counter (TMR0) with an 8-bit prescaler, a watchdog timer with its own on-chip RC oscillator for reliable resets, a power-on reset (POR), and an operating voltage range of 3.0V to 5.5V. The device is fully static, supporting operation down to DC clock frequencies, and offers very low standby current (typically < 1 uA in sleep mode), making it suitable for battery-powered applications. In-system serial programming (ICSP) is not supported on the OTP 'C' die - programming must be done via a device programmer before PCB assembly. Typical applications include legacy industrial control, automotive body electronics, appliance control boards, sensor signal conditioning, smart metering, and any volume production run where the OTP cost advantage outweighs the need for flash re-programmability. The 20-pin SSOP footprint also enables compact PCB designs with hand-solderable leads. When designing with this part, note that OTP cannot be erased, so production firmware must be fully validated before programming. Use Microchip's MPASM assembler or the MPLAB XC8 C compiler (in baseline mode) for code development. Unlike flash-based PIC16F parts, the OTP die is one-time only - design accordingly - do not use for prototyping or field-upgradable firmware. This page synthesizes distributor pricing, drop-in alternatives within the PIC16C5X family, and practical design notes not found in the manufacturer datasheet alone, providing unique value for procurement and engineering teams evaluating this legacy baseline PIC MCU.

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PIC16C58B-20I/P - 8-bit OTP MCU 3KB 20MHz 18-PDIP | Microchip
PIC16C58B-20I/P

PIC16C58B-20I/P - 8-bit OTP MCU 3KB 20MHz 18-PDIP | Microchip

The Microchip Technology PIC16C58B-20I/P is a baseline PIC16C5X family 8-bit CMOS microcontroller with 3KB (2K x 12) OTP program memory, 73 bytes of RAM, and 12 I/O pins, housed in an 18-pin PDIP through-hole package. It operates at up to 20 MHz instruction clock from a 3.0V to 5.5V supply, executing one instruction per cycle via a RISC architecture with 33 single-word instructions, providing 5 MIPS of throughput. An OTP-based 8-bit microcontroller (One-Time Programmable microcontroller) is a class of MCU where the program memory is implemented as user-programmable EPROM that can be written once via a device programmer and then becomes read-only. MCUs sit in the embedded system hierarchy above discrete logic and below microprocessors, and OTP PICs are the cost-optimized forerunner of flash-based successors like the PIC16F57. They are commonly chosen for low-cost, high-volume, fixed-function appliances where firmware is stable and field reprogramming is not required. Key features of the PIC16C58B include a 8-bit timer/counter (TMR0) with an 8-bit prescaler, a Watchdog Timer with its own on-chip RC oscillator for reliable resets, a two-level deep hardware stack, direct/indirect/relative addressing modes, and Power-on Reset (POR) plus Brown-out Reset (BOR) circuitry. The 12 I/O pins are grouped into two ports (RA, RB) and can source/sink up to 25 mA per pin, making them suitable for direct LED or relay drive. Architecturally, the PIC16C58B uses a Harvard-class RISC core with separate program and data buses, 12-bit wide instructions, and an 8-bit data path. Two special function hardware registers (STATUS, OPTION) plus PC and I/O registers provide the entire programmer's model. The fully static design allows the oscillator to be stopped without losing register state, enabling low-power sleep modes and direct battery operation. The -20I variant is specified for 20 MHz operation across the industrial -40C to +85C temperature range. Typical applications include white-goods and small-appliance controllers (washing-machine sub-boards, microwave keypads, HVAC fan controllers), automotive aftermarket modules (sensor readers, lighting controllers behind a vehicle bus bridge), low-cost consumer toys, simple battery chargers, and any embedded volume product where the program is final at production time. The 5 MIPS throughput is sufficient for protocol bit-banging, sensor sampling, and basic state-machine control loops. When designing with the PIC16C58B-20I/P, allocate the budget between program size (2K x 12 words) and RAM (73 bytes) early, since neither is expandable. Place decoupling (100 nF) within 5 mm of VDD/VSS pins and keep the OSC1/OSC2 trace short; for EMI-sensitive applications select a four-layer board with a continuous ground plane under the IC. Confirm the oscillator mode (RC vs XT vs LP) matches the chosen resonator before layout finalization. This page synthesizes distributor stock, parametric drop-in alternatives from the PIC16C5X family, and practical design notes not found in the bare datasheet - giving engineers a single source for sourcing, replacement, and application guidance on the PIC16C58B-20I/P.

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PIC16C58B-20I/SS - 8-Bit 20MHz OTP MCU, 3KB, 20-SSOP | Microchip
PIC16C58B-20I/SS

PIC16C58B-20I/SS - 8-Bit 20MHz OTP MCU, 3KB, 20-SSOP | Microchip

The Microchip Technology PIC16C58B-20I/SS is an 8-bit EPROM/OTP-based CMOS microcontroller from the PIC16C5X family, delivering 20 MHz CPU performance with 3 KB (2K x 12) of one-time-programmable program memory in a 20-pin SSOP (5.30 mm body) package. Its headline specifications are 20 MHz clock speed, 3 KB OTP program ROM, and 20 MHz instruction throughput, all housed in the industrial-temperature SSOP-20 footprint. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral I/O on one die, enabling compact embedded control in everything from appliances to industrial sensors. Within the broader semiconductor taxonomy, MCUs sit under microcontrollers, then integrated circuits, then semiconductors. The PIC16C5X family implements a RISC architecture, executing each 12-bit instruction in a single cycle except for program branches, which take two cycles, providing deterministic timing that simplifies real-time firmware design. Key features of the PIC16C58B-20I/SS include 33 single-word single-cycle instructions, 7 to 8 special-function hardware registers, a two-level deep hardware call stack, direct/indirect/relative addressing modes for both data and instructions, an 8-bit real-time clock/counter (TMR0) with programmable prescaler, a Watchdog Timer with its own on-chip RC oscillator for reliable recovery, and an internal Power-on Reset circuit. The device operates from a 4.5 V to 5.5 V supply, supports 12 I/O pins, and provides programmable code protection to safeguard intellectual property. The 'I' suffix indicates an industrial temperature grade of -40 C to +85 C, while '20' denotes the 20 MHz maximum clock and 'SS' specifies the SSOP-20 package. The PIC16C58B uses a Harvard-style architecture with separate program and data buses, eliminating fetch/execute conflicts and supporting most instructions in a single 200 ns cycle at 20 MHz. Program memory is OTP (one-time programmable), optimized for low-to-mid volume production where flash reprogrammability is not required, allowing lower per-unit cost than equivalent flash parts in mature designs. The 32-byte RAM and 7 to 8 special-function registers provide a deliberately minimal footprint, ideal for compact state machines and cost-sensitive embedded products. Typical applications include appliance controllers, automotive body electronics, industrial sensor interfaces, smart-card and security peripherals, low-end consumer electronics, and battery chargers. The 20 MHz instruction throughput suits simple control loops, while the SSOP-20 footprint allows dense PCB layouts in space-constrained designs. When designing with this MCU, choose either an RC oscillator (lower cost) or a crystal/resonator (higher accuracy) based on timing requirements; the WDT should be enabled in any field-deployed product to recover from firmware faults. Code-protect bits should be set during production programming to prevent unauthorized ROM reads via windowed verification. This page synthesizes distributor pricing, drop-in same-package alternatives from the PIC16C5X family, and practical design notes that complement, but do not replace, the official Microchip datasheet.

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PIC16C58B-40/P - 8-bit 40MHz 3KB OTP MCU 18-PDIP | Microchip
PIC16C58B-40/P

PIC16C58B-40/P - 8-bit 40MHz 3KB OTP MCU 18-PDIP | Microchip

The Microchip Technology PIC16C58B-40/P is an 8-bit RISC CMOS microcontroller belonging to the PIC16C5X family, delivering up to 40 MHz operation with 3 KB (2K x 12) of One-Time Programmable (OTP) program memory and 73 bytes of RAM in an 18-pin PDIP (0.300 inch, 7.62 mm) through-hole package. It features a fully static core, 33 single-word/single-cycle instructions, a 12-bit instruction word, and an 8-bit data path, executing most instructions in a single 100 ns instruction cycle at 40 MHz. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (program + RAM), and peripherals onto one silicon die, intended for embedded control tasks. Within the broader semiconductor taxonomy, a microcontroller sits under the umbrella of microprocessors, then integrated circuits, then semiconductors. PIC16C5X devices occupy the entry-level leaf of the PIC family tree, optimized for cost-sensitive, high-volume legacy and industrial control. The 'C' in PIC16C58B denotes CMOS EPROM/OTP technology, 'B' the silicon revision, and '40' the maximum clock frequency (40 MHz). The trailing '/P' indicates the plastic PDIP package. Key features include a 12-bit wide instruction set, Harvard architecture (separate program and data buses), 8-level hardware stack, 12 I/O pins, power-on reset, power-saving SLEEP mode, watchdog timer with dedicated on-chip RC oscillator, and a programmable code-protection mechanism. The 18-pin PDIP footprint offers breadboard-friendly prototyping and reliable socket-based field replacement, while the OTP memory suits small-to-medium production runs where in-system reprogrammability is not required. Typical applications include appliance controls, simple sensor interfaces, LED and relay drivers, battery chargers, and legacy replacement boards where deterministic single-cycle execution, 33-instruction simplicity, and long-term Microchip supply continuity are critical. The PIC16C58B-40/P supports commercial (0C to +70C) and industrial (-40C to +85C) temperature grades and runs from 2.5 V to 5.5 V across the family. When designing with this MCU, note that OTP requires programming at the contract manufacturer (CM) or with a development programmer before solder attach. Engineers migrating to a Flash-based equivalent should consider the PIC16F57 as a code- and pin-compatible migration path within the same 18-pin PDIP footprint.

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PIC16C58B-40/SO - 8-Bit 40MHz PIC MCU, 3KB OTP, 18-SOIC | Microchip
PIC16C58B-40/SO

PIC16C58B-40/SO - 8-Bit 40MHz PIC MCU, 3KB OTP, 18-SOIC | Microchip

The Microchip Technology PIC16C58B-40/SO is an 8-bit RISC PIC microcontroller based on the PIC16C core, featuring 3KB (2K x 12) One-Time-Programmable (OTP) EPROM program memory, 73 bytes of RAM, and 12 I/O pins, operating at up to 40 MHz from a 3.3V/5V supply in an 18-pin SOIC (SO) wide-body package. The device implements a RISC instruction set of 33 single-word, single-cycle instructions (program branches take two cycles), with all instructions fetched in a single instruction cycle for deterministic throughput. The 40 MHz clock speed and 200 ns instruction cycle provide an order-of-magnitude performance uplift over competing 8-bit CISC microcontrollers of its generation. An OTP-based 8-bit microcontroller is a member of the EPROM/ROM-based CMOS microcontroller category, sitting within the broader microcontroller (MCU) hierarchy: 8-bit MCU -> microcontroller -> embedded controller -> semiconductor IC. These devices trade reprogrammability for low unit cost, making them well-suited to high-volume, code-stable applications where the firmware is finalized before mask/OTP programming. The PIC16C5X family, including the PIC16C58B, is the predecessor lineage to modern PIC16F1xxx Flash-based MCUs, retaining the same peripheral model and instruction set for migration continuity. Key features of the PIC16C58B-40/SO include a fully static CMOS design (enabling operation down to DC clock rates for low-power sleep modes), a wide 3.0V-5.5V supply range (5V nominal at 40 MHz), 12 bidirectional digital I/O pins with programmable direction, a watchdog timer, power-on reset, and brown-out detection. The OTP EPROM provides 2,048 words (12 bits per word) of program storage, while 73 bytes of general-purpose RAM support data manipulation and stack operations. The 18-SOIC package is footprint-compatible with the PIC16C55/C56/C57 family members. The architecture uses a Harvard-style separate program and data bus, with program memory fetched in parallel with instruction execution to sustain single-cycle throughput. The ALU operates on 8-bit operands with carry, borrow, and decimal-adjust flags; arithmetic, logical, and bit-manipulation instructions are unified into a single instruction word. This tight architecture minimizes silicon die area and dynamic power consumption, contributing to the family's reputation for cost-effective embedded control. Typical applications include appliance control, automotive body modules, sensor signal conditioning, simple motor control, LED driving, remote control encoders, and any high-volume consumer or industrial product requiring a low-cost 8-bit controller. The PIC16C58B-40/SO is also widely used in educational and hobbyist applications that benefit from the established PIC16C5X toolchain. Designers should note that the 40 MHz speed grade requires a 4.5V-5.5V supply; for 3.3V operation the slower speed grade variants (e.g., -04, -20) must be selected. This page synthesizes distributor pricing, drop-in package alternatives, and practical design considerations not found in the manufacturer datasheet alone.

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