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PIC16HV540-20/P - 8-Bit 20MHz OTP MCU with On-Chip Regulator | Microchip
PIC16HV540-20/P

PIC16HV540-20/P - 8-Bit 20MHz OTP MCU with On-Chip Regulator | Microchip

The Microchip Technology PIC16HV540-20/P is an 8-bit EPROM-based CMOS microcontroller with an integrated on-chip voltage regulator, available in a 18-pin PDIP through-hole package. Operating from 3.5V to 15V supply with a maximum clock rate of 20MHz, it offers 768 bytes of OTP program memory (512 x 12-bit words) and 25 bytes of RAM, with 12 digital I/O pins. A key feature is the on-chip 3V and 5V shunt regulator that eliminates the need for an external regulator when powered from unregulated 9V or 12V batteries or mains adapters, simplifying power supply design and reducing BOM cost. A microcontroller (MCU) is a single-chip computer containing a processor core, program memory, data memory, and programmable I/O peripherals; the PIC16HV540 belongs to the base-level PIC16C5X-compatible 8-bit RISC microcontroller family in the broader taxonomy of microcontroller -> embedded processor -> integrated circuit -> semiconductor. The 33 single-word instruction set and 12-bit-wide orthogonal instructions deliver 2:1 code compression over competing 8-bit MCUs in the same price class. Key features include 20MHz maximum operating frequency (4MHz factory-default oscillator configuration available, hence the -20 speed suffix), 12 I/O pins with individual direction control, an 8-bit timer/counter, a watchdog timer, and power-on reset. The internal voltage regulator is the defining differentiator; it allows direct battery or transformer-rectifier connection with no external regulation stage. The device uses a Harvard-architecture RISC core with separated program and data buses, fully static operation, and a wide operating temperature range appropriate for embedded industrial and commercial environments. The OTP program memory is one-time programmable, targeting volume production where final firmware is fixed. Typical applications include 9V or 12V battery-powered appliances, mains-powered consumer products using transformer-rectifier supplies without regulation, sensor interface controllers, simple timing and sequencing logic replacements, automotive accessory modules, and low-cost industrial controllers where the on-chip regulator reduces part count and PCB area. When designing with the PIC16HV540, verify the chosen clock frequency matches the supply voltage across the full operating range; the -20 speed grade requires appropriate oscillator configuration, and the user must decide between the factory-masked oscillator and an external RC/crystal source based on timing accuracy requirements. This page consolidates pricing across multiple distributors, all five drop-in alternatives sharing the 18-PDIP footprint, and practical design notes to accelerate selection for new and existing 8-bit designs.

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PIC16HV540-20/SO - 8-Bit 20MHz OTP MCU 768B | Microchip
PIC16HV540-20/SO

PIC16HV540-20/SO - 8-Bit 20MHz OTP MCU 768B | Microchip

The Microchip Technology PIC16HV540-20/SO is a high-performance 8-bit CMOS microcontroller with 768B (512 x 12) OTP program memory, 25B RAM, and 12 I/O pins, operating at up to 20MHz in an 18-pin SOIC package. It integrates an on-chip shunt voltage regulator that allows direct operation from supply voltages between 3.5V and 15V, eliminating the need for a separate 5V regulator in many designs. An 8-bit microcontroller (MCU) is a microprocessor optimized for embedded control, integrating CPU, RAM, non-volatile program memory, and I/O peripherals on a single die. Within the broader taxonomy, the PIC16HV540 sits in the legacy Enhanced PIC16C5x family (MCU -> 8-bit MCU -> PIC16xx family -> 16C/16HV subfamily), targeting cost-sensitive applications where simple deterministic timing and low part count outweigh the need for modern peripherals. The 12-bit wide instruction word yields 2:1 code compression over competing 8-bit architectures, and the 33-instruction RISC set delivers 200ns instruction execution at 20MHz. The PIC16HV540's distinguishing feature is the on-chip shunt voltage regulator - the "HV" in the part number. This internal regulator derives the 5V core supply directly from the high-voltage rail, so designers can connect the device to a 9V or 12V supply without an external regulator. The 12 I/O pins support direct LED drive, key-scan matrix input, and simple digital sensing. Other features include a watchdog timer, power-on reset, and an EPROM-based program memory in this OTP configuration. Typical applications span appliance controllers, automotive body electronics, security keypads, lighting ballasts, and industrial timers. The wide 3.5-15V supply range makes it well suited to 12V-bus industrial systems where a single IC must operate directly from the unregulated rail. The 18-SOIC package footprint enables compact PCB layouts in surface-mount assemblies. When designing with this part, note the OTP memory cannot be re-programmed in-circuit - use the PIC16HV540-04I/SO (industrial temperature grade) or PIC16LF versions for development. The internal shunt regulator draws bias current proportional to the input voltage - account for the additional quiescent dissipation at 15V supply.

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PIC16HV540-20/SS - 8-bit OTP MCU with Voltage Regulator | Microchip
PIC16HV540-20/SS

PIC16HV540-20/SS - 8-bit OTP MCU with Voltage Regulator | Microchip

The Microchip PIC16HV540-20/SS is an 8-bit EPROM-based CMOS microcontroller with an on-chip high-voltage shunt regulator, delivering 200 ns instruction execution at 20 MHz in a 20-pin SSOP package. It provides 768 bytes of OTP program memory (512 x 12), 25 bytes of RAM, and 12 I/O pins, with the on-chip voltage regulator enabling direct operation from supplies up to 15V without an external regulator. A microcontroller (MCU) is an integrated circuit that combines a CPU, non-volatile program memory, volatile working RAM, and peripheral I/O on a single die. Within the broader hierarchy, the PIC16HV540 belongs to the 8-bit MCU family, more specifically the PIC16 family of OTP/EPROM microcontrollers, which occupy the entry-level and cost-sensitive tier of Microchip's PIC portfolio. The 8-bit MCU category itself sits inside microcontrollers and embedded controllers, which are part of the integrated circuits and embedded systems domain. The 20 MHz oscillator and 200 ns instruction cycle deliver five million instructions per second (5 MIPS). With 12-bit wide, highly orthogonal instructions, code density is roughly 2:1 better than competing 8-bit MCUs in the same price range, simplifying firmware development and reducing memory pressure on the small 768-byte OTP program store. Twelve bidirectional I/O pins, an 8-bit timer/counter with a prescaler, watchdog timer, power-on reset, and programmable code protection round out the on-chip peripherals. The standout architectural feature is the on-chip shunt voltage regulator on the VDD pin, which permits the device to run from raw supplies up to 15V by absorbing excess voltage as heat in an external resistor. This eliminates the need for an external 5V regulator in many cost-sensitive and battery-charging applications. The CMOS process yields very low power consumption, with typical active current under 2 mA at 5V/4 MHz and standby currents in the microamp range. Typical applications include single-cell battery chargers, automotive control modules, security and access-control devices, low-cost remote controls, and white-goods control boards. Industrial uses span appliance timing, smart sensors, and simple motor control loops where the high-voltage input capability is a differentiator. The industrial -40C to +85C range option (PIC16HV540-20I/SS) extends reach to harsher environments. When designing with this part, treat the shunt regulator power dissipation as a thermal load. At 12V input delivering 5 mA to the chip, the shunt resistor dissipates approximately (12-5) x 5 mA = 35 mW - low enough for a 0805 resistor. Brown-out and watchdog configurations must be set in the configuration word at programming time; verify the configuration bits in your hex file before going to production. This page synthesizes distributor pricing, same-brand PIC16C5x drop-in alternatives, and practical thermal and EMI notes not found in the manufacturer datasheet alone.

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PIC16HV540-20I/P - 8-Bit 20MHz OTP MCU w/ Shunt Regulator | Microchip
PIC16HV540-20I/P

PIC16HV540-20I/P - 8-Bit 20MHz OTP MCU w/ Shunt Regulator | Microchip

The Microchip Technology PIC16HV540-20I/P is an 8-bit CMOS RISC microcontroller in the PIC16C family, packaged in an 18-pin PDIP (Plastic DIP) and built around an enhanced PIC16C54 core. According to the manufacturer datasheet, it integrates 768B of OTP program memory (512 x 12 words), 25 bytes of data RAM, and 12 I/O pins, and it executes at a maximum clock speed of 20 MHz. Its defining feature is an on-chip shunt voltage regulator that lets the device operate directly from a 3.5 V to 15 V supply without an external regulator IC. The -20I suffix denotes 20 MHz maximum frequency at the industrial temperature range of -40 C to +85 C. A microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and I/O peripherals. Within the semiconductor hierarchy, an MCU is a member of the embedded controllers / microcontrollers class, which sits under digital logic ICs and broader integrated circuits. The PIC16HV540 specifically belongs to the PIC16C mid-range family, characterized by a 12-bit instruction word, 33 single-word instructions, and a 2:1 code density advantage over competitive 8-bit MCUs. Key features include an internal oscillator option that eliminates the need for an external crystal in cost-sensitive designs, a programmable watchdog timer with its own on-chip RC oscillator, an 8-bit real-time clock/counter with 8-bit prescaler, and a power-on reset / brown-out reset combination. Code protection is provided by security bit programming, and the device supports in-circuit serial programming (ICSP) via the RB6/RB7 pins. The shunt regulator topology internally clamps VDD, simplifying power design in battery-powered and automotive-style applications. Typical applications include low-cost battery chargers, smart battery management, power supply monitoring and supervisory circuits, automotive subsystems, and any node that previously required an external regulator plus microcontroller combination. The wide 3.5 V to 15 V supply range and on-chip regulator make the part especially useful in 12 V lead-acid battery systems, two-cell lithium packs, and industrial control boards where the supply rail is unregulated. When designing with the PIC16HV540-20I/P, engineers should note that the shunt regulator diverts excess current to ground as heat; at high supply voltages (12-15 V) the shunt dissipation can reach several hundred milliwatts, so PCB copper area or thermal relief matters. The OTP memory is one-time programmable - code must be verified before production burn, and field firmware updates are not possible. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, providing an independent reference for sourcing and BOM decisions.

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PIC16HV540-20I/SO - 8-Bit 20MHz OTP MCU with Shunt Regulator
PIC16HV540-20I/SO

PIC16HV540-20I/SO - 8-Bit 20MHz OTP MCU with Shunt Regulator

The Microchip Technology PIC16HV540-20I/SO is an 8-bit RISC microcontroller built on the enhanced PIC16C5x core, integrating an on-chip shunt voltage regulator that allows direct operation from high-voltage supplies (5V, 9V, or 12V nominal). The device executes instructions at 20MHz, delivering a 200ns instruction cycle, and packs 768B (512 x 12) of One-Time-Programmable (OTP) program memory with 25 bytes of general-purpose RAM. It is housed in an 18-pin SOIC package and is offered in the industrial temperature grade (-40C to +85C). An 8-bit OTP microcontroller is a single-chip computer whose program memory is written once at production time using One-Time-Programmable EPROM cells, after which the bit pattern becomes permanent. This positions the MCU as a low-cost, low-pin-count cousin in the broader 8-bit PIC family -> RISC microcontroller -> embedded controller -> semiconductor hierarchy. The PIC16HV540 is engineered for cost-sensitive, fixed-function embedded tasks such as logic replacement, sensor signal conditioning, and motor timing. Key differentiating features include the integrated shunt regulator that eliminates the need for an external 5V regulator on a 9V or 12V bus, 12 bidirectional I/O pins with individually programmable direction, a hardware watchdog timer, and a programmable 8-bit prescaler shared by Timer0 and the watchdog. The architecture is based on a 12-bit-wide instruction word, achieving 2:1 code compression versus competing 8-bit MCUs in the same price class, which lowers program-memory pressure. Typical applications include logic-replacement glue on 12V industrial bus lines, automotive interior lamp and HVAC actuators (pre-CAN nodes), battery chargers for sealed lead-acid cells, capacitive-touch front-panel controllers, and dedicated sensor-interface MCUs in white goods. The on-chip shunt regulator also makes the part a strong fit for any application where the MCU must be powered directly from a high-voltage DC rail without an external LDO. When designing with this part, note that the integrated shunt regulator drops excess voltage across the device; the package must dissipate P = (VIN - 5V) x ILOAD watts, so adequate copper area is essential at high VIN. OTP devices cannot be re-programmed in-circuit - code must be finalized and burned during production programming.

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PIC16HV540-20I/SS - 20MHz 8-Bit MCU 768B OTP 20-SSOP | Microchip
PIC16HV540-20I/SS

PIC16HV540-20I/SS - 20MHz 8-Bit MCU 768B OTP 20-SSOP | Microchip

The Microchip Technology PIC16HV540-20I/SS is an enhanced PIC16C54 8-bit CMOS OTP microcontroller with an integrated high-voltage shunt regulator, packaged in a 20-pin SSOP (5.30 mm body) and rated for industrial temperature operation. It executes instructions in 200 ns (5 million instructions per second at 20 MHz oscillator) and provides 768 bytes (512 x 12) of on-chip OTP program memory, 25 bytes of general-purpose RAM, and 12 bidirectional I/O pins. The 'HV' suffix denotes an internal shunt voltage regulator that accepts a wide external supply and derives VDD on-chip from VPP - useful when a single high-voltage rail powers both logic and programming. An 8-bit OTP microcontroller is a single-chip computer built around an 8-bit data path and one-time-programmable non-volatile memory that retains code without power. In the broader taxonomy, OTP microcontrollers sit beneath flash-based MCUs (re-programmable) and above mask-ROM MCUs (factory-programmed only); all three belong to the embedded controller sub-class of microcontrollers, which themselves are integrated circuits under the semiconductor umbrella. PIC16C/PIC16HV devices target cost-sensitive, deterministic control applications where code protection, ultra-low sleep current, and a small footprint matter more than large memory or high clock speed. Key features of the PIC16HV540-20I/SS include a 12-bit instruction word with 33 single-word/35 single-cycle instructions, an 8-bit real-time timer/counter with 8-bit programmable prescaler, watchdog timer with on-chip RC oscillator, internal power-on reset, internal MCLR pull-up, code protection, power-saving SLEEP mode, selectable oscillator options (RC, XT, LP, HS), and an operating voltage range of approximately 3.5 V to 15 V delivered through the integrated HV shunt regulator from a higher external VPP. The architecture is a RISC Harvard design with separate program and data buses; the ALU is 8-bit and most instructions execute in a single instruction cycle except for program branches which take two cycles. The on-chip HV regulator eliminates the need for an external 7805-style regulator in many battery or high-voltage-bus designs, simplifying the BOM. Typical applications include low-cost battery-powered appliances, smoke detectors and CO sensors, electronic meters and utility metering front-ends, simple motor/relay drivers, automotive body controllers, and white-goods control boards. The device is well-suited wherever a small pin count, deterministic timing, and a wide unregulated supply range are priorities. When designing with the PIC16HV540-20I/SS, remember OTP memory cannot be re-programmed in-circuit - prototypes should be built with windowed (JW) or flash variants before committing. The integrated HV regulator dissipates excess voltage as heat, so thermal management of the shunt resistor and decoupling placement are important at high VPP voltages. This page synthesizes distributor pricing, same-package drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC16HV540/JW - 8-bit 20MHz MCU, 768B EPROM, On-chip Voltage Regulator | Microchip
PIC16HV540/JW

PIC16HV540/JW - 8-bit 20MHz MCU, 768B EPROM, On-chip Voltage Regulator | Microchip

The Microchip Technology PIC16HV540/JW is an 8-bit, fully-static, EPROM/UV-erasable CMOS microcontroller in a windowed 18-pin CERDIP package, operating at a 20 MHz core clock. It integrates 768 bytes (512 x 12) of EPROM program memory and includes a high-voltage shunt regulator on-chip, allowing direct operation from 3.5 V to 15 V supplies without an external regulator. The "JW" suffix indicates the ceramic CERDIP package with a quartz window for UV erasure, supporting engineering prototype and development workflows where code iteration is frequent. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (ROM/EPROM/Flash), working RAM, and programmable I/O into one package, allowing it to directly read sensors and drive actuators without external glue logic. The PIC16HV540 belongs to the PIC16C5X family lineage - 12-bit-wide instructions that compress 2:1 versus typical 8-bit MCUs, with only 33 single-word instructions, all single-cycle (200 ns at 20 MHz). On-chip peripherals include a watchdog timer, power-on reset, and a precision internal RC oscillator for reduced BOM cost. Key features: 25 ns instruction cycle at 20 MHz oscillator, 12-bit instruction word, 8-bit data path, 25 bytes of general-purpose RAM, 12 I/O pins with high-current sink/source capability (25 mA per pin, 100 mA total), on-chip voltage regulator accepting 3.5 V to 15 V, and a hardware watchdog timer for unattended operation. The part is pin- and software-compatible with the PIC16C54 baseline, simplifying migration from PIC16C5X code. UV-erase capability allows >100 erase/program cycles during development. The PIC16HV540's distinctive architecture blends RISC-style orthogonal 12-bit instructions with a one-accumulator Harvard memory model, where program and data buses are physically separate, eliminating fetch bottleneck. The on-chip high-voltage shunt regulator accepts wide-input rails and clamps the internal logic supply to a safe 5 V level, which is what gives the "HV" prefix its name. The UV-erase window enables long-term code evolution without tooling changes. Typical applications include embedded control with battery stacks (3-cell to 12-cell stacks fed directly), automotive body controllers (pre-CAN era), HVAC actuator drivers, security panels, white-goods controllers, industrial timer/counter modules, and remote sensor interfaces. The high-current I/O allows direct LED and relay drive without buffers. When designing with PIC16HV540/JW, ensure the VDD pin sees only the regulated internal rail while VIN feeds the shunt regulator directly. Decouple both pins locally with 100 nF ceramics. The windowed CERDIP package is bulkier than plastic OTP/SOIC variants but is the only option if UV erasure and reprogramming is required.

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PIC16HV540T-04/SO - 8-bit OTP MCU 4MHz 18-SOIC | Microchip
PIC16HV540T-04/SO

PIC16HV540T-04/SO - 8-bit OTP MCU 4MHz 18-SOIC | Microchip

The Microchip Technology PIC16HV540T-04/SO is a PIC16C-family 8-bit CMOS microcontroller with on-chip voltage regulator, 4 MHz maximum operating frequency, 768 bytes (512 x 12) of One-Time-Programmable (OTP) program memory, and 25 bytes of RAM, housed in an 18-pin SOIC package. Its integrated shunt-type voltage regulator accepts a wide 3.0 V to 15 V supply range and produces a regulated 5 V core rail, eliminating the need for an external LDO in many applications. The device executes instructions in a single 200 ns cycle (4 MHz oscillator / 1 µs instruction cycle) and uses the classic enhanced PIC16C5x 33-instruction RISC instruction set. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (ROM/OTP/Flash), working RAM, I/O peripherals, and clock generation onto one silicon die. The PIC16HV540 belongs to the taxonomy PIC16C -> PIC family -> 8-bit microcontroller -> microcontroller -> embedded processor -> semiconductor IC. It is a Harvard-architecture RISC device: program and data memories are separate, instructions are fixed-width single-word, and most instructions complete in one cycle, which keeps deterministic timing for interrupt-driven control loops. Key features of the PIC16HV540T-04/SO include 12 programmable digital I/O pins with high-current sink capability, an 8-bit timer/counter (TMR0) with a programmable prescaler, a watchdog timer with its own on-chip RC oscillator, power-on reset, brown-out detection, and an internal 4 MHz RC oscillator option. The on-chip voltage regulator lets the part run from a single 9 V or 12 V wall-adapter supply while still presenting a clean 5 V to downstream logic. Power-saving SLEEP mode drops current to the microamp range, suitable for battery-backed or energy-harvesting designs. Architecturally, the PIC16HV540 combines a 14-bit instruction word with an 8-bit data path and a two-stage pipeline. Program memory is OTP, allowing one-time customization for production volumes. The 12-bit-wide instruction words are fetched from the 512-word OTP array while the 25-byte general-purpose RAM handles variables and stack. The integrated voltage regulator is a parallel/shunt regulator rather than a series LDO, which means the input is tolerant of high voltages (commonly 9 V or 12 V) but cannot source large output currents to external loads. Typical applications include low-cost appliance controllers, LED lighting controllers, remote controls, sensor signal conditioning with on-board A/D-free logic, automotive interior modules (non-safety), battery chargers, and any 8-bit embedded node that benefits from wide input voltage tolerance. The 25-byte RAM and 768-byte OTP keep it best suited to compact deterministic control rather than data-rich connectivity stacks. Designers should choose this MCU when wide-input-voltage single-rail operation and ultra-low BOM cost matter more than peripheral density. The SOIC-18 footprint and 33-instruction core make firmware migration from other PIC16C5x parts straightforward. Note that OTP means firmware cannot be field-updated - mask-ROM equivalents (PIC16CR540) or Flash PIC16F equivalents should be considered when in-system reprogrammability is required.

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PIC16HV540T-04I/SO - 8-Bit 4MHz OTP MCU 18-SOIC | Microchip
PIC16HV540T-04I/SO

PIC16HV540T-04I/SO - 8-Bit 4MHz OTP MCU 18-SOIC | Microchip

The Microchip Technology PIC16HV540T-04I/SO is an 8-bit, fully-static CMOS microcontroller built around the PIC16C5x architecture, integrating a unique on-chip shunt voltage regulator that allows direct operation from supply rails of 3.5V to 15V without external regulation. It executes instructions at 4 MHz, ships in an 18-SOIC surface-mount package, and contains 768 bytes (512 x 12) of One-Time-Programmable (OTP) EPROM program memory with 25 bytes of general-purpose RAM and a hardware 8-bit timer/counter. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and peripheral I/O on one die. The PIC16C family uses a Harvard architecture with 12-bit-wide instructions and 33 single-word opcodes, achieving approximately 2:1 code compression versus competing 8-bit MCUs in its class. The on-chip shunt regulator places the PIC16HV540 into the power-management-aware microcontroller category, suitable for direct battery or unregulated bus operation. Key differentiating features of the PIC16HV540T-04I/SO include the integrated high-voltage shunt regulator (eliminating external regulator cost), 12 bidirectional I/O pins with high-current sink capability, a Watchdog Timer with dedicated on-chip RC oscillator, Power-on Reset, and an industrial operating temperature range of -40C to +85C. The 33-instruction RISC-like instruction set enables deterministic single-cycle execution except for program branches, simplifying real-time control firmware development. Architecturally, the PIC16HV540 combines a 4 MHz internal instruction clock with two hardware interrupt sources (external INT pin and timer overflow), an 8-bit real-time clock/counter with 8-bit prescaler, and a CONFIG word for oscillator, watchdog, code-protect, and timer mode selection. OTP program memory supports low-volume production runs, while the integrated shunt regulator simplifies power-tree design in cost-sensitive embedded systems. Typical applications include industrial control logic, automotive body electronics, low-cost consumer appliance controllers, battery-powered sensor nodes, and replacement of legacy PIC16C5x designs. Designers select this part when unregulated 12V or battery power is available and bill-of-material cost is critical. A key design consideration is that OTP memory cannot be re-programmed; for prototyping, prefer the windowed JW package. The shunt regulator dissipates excess voltage as heat - at 15V input and 5V Vdd load, thermal management of the SOIC package must be verified. This page synthesizes XAIPART distributor pricing, same-family pin-compatible Microchip variants, drop-in cross-references, and practical design notes not consolidated on the manufacturer datasheet, giving engineers a single decision-ready reference.

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PIC16HV540T-20/SS - 8-Bit 20MHz OTP MCU with Shunt Regulator | Microchip
PIC16HV540T-20/SS

PIC16HV540T-20/SS - 8-Bit 20MHz OTP MCU with Shunt Regulator | Microchip

The Microchip Technology PIC16HV540T-20/SS is an 8-bit CMOS PIC microcontroller with an integrated high-voltage shunt regulator, supplied in a 20-pin SSOP package. It operates at up to 20 MHz with 200 ns instruction execution, 768 bytes (512 x 12) of One-Time Programmable (OTP) program memory, and 25 x 8 bytes of general-purpose RAM. The 'HV' suffix denotes the on-chip shunt regulator that allows direct operation from supplies up to 15 V without an external 5 V LDO. An 8-bit PIC microcontroller is a RISC-based single-chip computer that combines a CPU, non-volatile program memory, RAM, and peripherals on a single silicon die. PIC microcontrollers sit within the broader taxonomy of microcontrollers -> embedded processors -> semiconductor ICs. The PIC16HV540 belongs to the enhanced PIC16C5x family and is designed for cost-sensitive, high-voltage applications where a small instruction set, deterministic timing, and minimal external components are priorities. The integrated shunt regulator simplifies power design in industrial control and automotive subsystems. Key features include 33 single-word single-cycle instructions delivering 2:1 code compression versus typical 8-bit CISC architectures, a wide 3.5 V to 15 V supply range accommodated by the on-chip regulator, 12 I/O pins with high-current sink capability, an 8-bit timer/counter, and a watchdog timer for reliable unattended operation. The device supports external RC and crystal oscillator modes and offers a power-saving SLEEP mode. Twelve-bit-wide instructions simplify arithmetic-heavy code. The PIC16HV540 architecture uses a Harvard-style two-bus design separating program and data memory, enabling simultaneous instruction fetch and operand access. The OTP program memory uses EPROM cells that are one-time programmable, suitable for low-to-medium volume production. The integrated shunt regulator monitors VDD and clamps excess voltage, allowing direct connection to loosely regulated rails such as 12 V battery or 24 V industrial supplies after a series dropping resistor. Typical applications include battery chargers, LED drivers, capacitor discharge circuits, remote controls, and simple sensor interfaces where the wide supply tolerance eliminates external regulation. The PIC16HV540 is well-suited to appliance controls, automotive accessory modules, and standalone low-cost embedded controllers. When designing with this part, choose the series dropping resistor so that worst-case shunt current remains above the regulator minimum (typically 5 mA) at the lowest expected input voltage. Add adequate bulk capacitance at VDD to absorb inrush current and decouple high-frequency noise from the shunt regulator. This page consolidates distributor pricing, drop-in SSOP-20 alternatives within the PIC16HV540 family, and design guidance not present on a typical catalog page.

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PIC16HV540T-20I/SO - 8-Bit OTP MCU 20MHz 768B | Microchip
PIC16HV540T-20I/SO

PIC16HV540T-20I/SO - 8-Bit OTP MCU 20MHz 768B | Microchip

The Microchip Technology PIC16HV540T-20I/SO is an 8-bit PIC® 16C-series microcontroller with on-chip shunt voltage regulator, 768 bytes of OTP program memory organized as 512 x 12-bit words, and 25 bytes of general-purpose RAM. Housed in a surface-mount 18-SOIC package (0.295" / 7.50 mm body width) with 12 programmable I/O pins, the device runs at 20 MHz maximum clock and accepts a wide 3.5 V to 15 V supply. An 8-bit microcontroller (MCU) is a small single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and peripheral I/O on a single silicon die. Within the broader taxonomy, the PIC16HV540 sits at: 8-bit MCU -> RISC microcontroller -> PIC® 16C family -> EPROM/OTP-based device -> embedded controller -> semiconductor IC. OTP variants are one-time programmable and intended for low-to-medium-volume production or where firmware is final and code-protection is required. Key features of the PIC16HV540 include the integrated shunt (HV) voltage regulator that lets the part operate directly from an unregulated high-voltage supply, an industrial -40 °C to +85 °C operating range denoted by the "I" suffix, and 33 single-word RISC instructions with a 2:1 code compression advantage over competing 8-bit architectures. The wide supply window simplifies power-tree design in appliances, automotive accessory modules, and battery chargers. The PIC16HV540 uses a Harvard RISC core with 12-bit-wide instructions and a 20 MHz oscillator input, gated through an internal 4-state instruction pipeline. On-chip peripherals include a watchdog timer, power-on reset, and a programmable I/O structure. The on-die HV regulator converts an external high-voltage source to the internal logic supply without an external regulator IC, reducing BOM cost. Typical applications include white-goods and appliance control, automotive accessory controllers, battery chargers, uninterruptible power supplies (UPS), and remote sensor nodes. The wide voltage tolerance suits 12 V automotive and 9 V battery-powered systems where a conventional 5 V MCU would otherwise require an external regulator. When designing with this part, leave adequate decoupling on VDD (typically 0.1 µF + 10 µF), respect the 4 MHz instruction-cycle derivative implied by the 20 MHz oscillator input, and verify that OTP programming timing falls inside the device programming specification. Industrial-grade screening makes this part preferable over the commercial "-20/SO" variant for harsh environments. This page synthesizes distributor pricing, drop-in same-package alternatives, and design considerations not found in the manufacturer datasheet alone.

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PIC16HV540T-20I/SS - 8-Bit 20MHz OTP MCU w/ Voltage Regulator | Microchip
PIC16HV540T-20I/SS

PIC16HV540T-20I/SS - 8-Bit 20MHz OTP MCU w/ Voltage Regulator | Microchip

The Microchip Technology PIC16HV540T-20I/SS is an 8-bit CMOS OTP microcontroller based on the Enhanced PIC16C54 core, integrating an on-chip shunt voltage regulator and packaged in a 20-pin SSOP. It executes instructions in a single 200 ns cycle at 20 MHz and offers 768 bytes (512 x 12) of OTP program memory, 25 bytes of RAM, and 12 I/O pins. What is an 8-bit OTP microcontroller? It is a small, single-chip computer built around an 8-bit data path, using One-Time-Programmable (OTP) ROM/EPROM for program storage. The PIC16HV540 belongs to the hierarchy: microcontroller -> embedded MCU -> 8-bit MCU -> PIC16 family -> PIC16C5x enhanced sub-family. Its distinguishing trait is the on-chip high-voltage shunt regulator that lets the part run directly from an unregulated 3.5 V to 15 V supply without an external 5 V regulator, simplifying offline and appliance designs. Key features include a 12-bit wide instruction word that delivers 2:1 code compression versus competing 8-bit MCUs, only 33 single-word instructions to learn, and a DC to 20 MHz operating range with 200 ns instruction cycle. The device includes a Watchdog Timer with on-chip RC oscillator, Power-on Reset, and code-protection for the OTP array. The integrated shunt regulator eliminates the external LDO typically required for 12 V supply rails. Technically, the Enhanced PIC16C54 architecture uses a two-stage pipeline with a 12-bit instruction word fetched in one cycle and executed in the next, yielding deterministic single-cycle throughput. The on-chip shunt regulator can be configured as a 5 V zener-like reference or a feedback-stabilized 3 V / 5 V rail, easing direct connection to 12 V batteries and rectified mains-derived rails. Typical applications include white-good appliance control, battery chargers, LED drivers, remote controls, smart meters, and any cost-sensitive embedded node where a single 3.5-15 V supply should power the MCU without a separate regulator. Industrial and automotive subsystems (non-safety) also adopt it for its wide supply tolerance. When designing with this part, note that OTP memory cannot be re-programmed in-circuit - prototypes should use the JW or windowed CERDIP variant. The SSOP-20 package is best suited to moderate-volume SMT production. This page synthesizes distributor pricing, drop-in alternatives within the PIC16HV540 family, and practical design notes that go beyond the manufacturer datasheet.

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PIC16HV610-E/ML - 1.75KB Flash 8-bit MCU, 20MHz, High-Voltage | Microchip
PIC16HV610-E/ML

PIC16HV610-E/ML - 1.75KB Flash 8-bit MCU, 20MHz, High-Voltage | Microchip

The Microchip Technology PIC16HV610-E/ML is a 14-pin, Flash-based 8-bit CMOS microcontroller from the PIC16F610/16HV610/16F616/16HV616 family, housed in a 16-pin QFN (ML) package with 1.75 KB of Flash program memory and 72 bytes of RAM. It integrates an 8 MHz internal oscillator, two analog comparators, a 10-bit A/D converter (on the F616/HV616 sibling variants), and the unique shunt regulator (high-voltage) feature that enables direct operation from 2 V to 15 V supply rails without an external regulator. A high-voltage PIC microcontroller is a variant of the standard PIC16 baseline family that integrates an internal shunt regulator on the VDD pin, allowing the part to source current from a higher-voltage bus while clamping VDD to a safe logic level. This makes the PIC16HV610 part of the microcontroller -> 8-bit MCU -> PIC16 baseline -> high-voltage PIC hierarchy, sitting alongside general-purpose logic and analog peripherals for sensor and motor control. The HV610 suffix specifically refers to the internal shunt regulator block, distinguishing it from the lower-voltage PIC16F610 sibling. Key features include 1.75 KB self-programmable Flash, 72 B SRAM, 128 B EEPROM (HV616 variant), two enhanced analog comparators with programmable on-chip reference, an internal 8 MHz oscillator, and a wide 2 V to 15 V operating range enabled by the integrated shunt regulator. The 16-pin QFN package gives a compact 4x4 mm footprint suitable for high-density designs, while the industrial-grade -40C to +125C operating range supports automotive, industrial, and appliance environments. Technically, the PIC16HV610 uses a 14-bit instruction word RISC architecture with a hardware stack of 8 levels, single-cycle instructions except for branches, and a 20 MHz maximum clock speed from an external source or the internal 8 MHz oscillator. The integrated shunt regulator removes the need for an external LDO in 12 V or 24 V bus systems, reducing BOM cost and PCB area. NanoWatt Technology provides power-managed sleep modes for battery and energy-harvesting applications. Typical applications include high-voltage sensor interfaces, white-good and appliance control, automotive interior modules, battery chargers, LED lighting controllers, and 12 V/24 V industrial sensor signal conditioning. The internal shunt regulator and two comparators make it especially well-suited to analog front-end tasks where the MCU must coexist on a high-voltage rail. When designing with this part, designers should consider the shunt regulator's current limit and power dissipation: at 15 V input the shunt can dissipate up to ~0.9 W into VDD, requiring thermal management per the datasheet. The HV610 variant does not include the 10-bit ADC; choose PIC16HV616-I/ML if ADC is required. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16HV610-I/ML - 1.75KB Flash 8-bit MCU, 20MHz, QFN-16 | Microchip
PIC16HV610-I/ML

PIC16HV610-I/ML - 1.75KB Flash 8-bit MCU, 20MHz, QFN-16 | Microchip

The Microchip Technology PIC16HV610-I/ML is a 14-bit instruction-width, 8-bit Flash-based CMOS microcontroller from the PIC® 16F family, packaged in a 16-pin QFN with exposed pad. It integrates 1.75 KB of Flash program memory (1K x 14), 72 bytes of RAM, and a high-voltage shunt regulator that allows direct operation from supply rails up to 15 V without an external regulator. The CPU executes instructions at up to 20 MHz from an internal oscillator or external clock source. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash/ROM), volatile working memory (RAM), and peripheral blocks such as timers, ADCs, comparators, and communication interfaces on one die. Within the embedded hierarchy, this part belongs to the 8-bit MCU class (microcontroller -> MCU -> microcontroller IC -> integrated circuit -> semiconductor). PIC16 devices target low-pin-count, low-cost embedded control tasks such as appliance timers, LED drivers, sensor conditioning, and simple user-interface firmware. Key features include 11 I/O pins with interrupt-on-change capability, a 10-bit ADC with up to 8 input channels, two analog comparators with programmable references, an Enhanced Capture/Compare/PWM (ECCP) module, and an internal 8 MHz oscillator. The integrated high-voltage shunt regulator (HV) accepts VIN from 2 V up to 15 V, allowing direct bus connection in 12 V systems. The device supports in-circuit serial programming (ICSP) via two pins and operates across -40 °C to +85 °C industrial temperature range. The PIC16HV610 uses a 14-bit wide instruction set with a modified Harvard architecture, where program and data buses are separated for predictable single-cycle execution of most instructions. The HV shunt regulator and wide VIN tolerance remove the need for an external LDO in 12 V battery or industrial bus systems, simplifying BOM and reducing board area. Typical applications include LED lighting controllers, battery chargers, appliance timers, smoke detectors, simple sensor interfaces, and 12 V industrial sensor nodes. The 2 V minimum supply voltage also enables direct use with two-cell battery packs. When designing with this MCU, allocate at least one ICSP clock/data pair (RB6/RB7) for in-circuit programming and verify the exposed thermal pad is soldered to a sufficient copper pour for thermal dissipation under sustained peripheral activity. The 72-byte RAM constrains stack depth and large arrays, so prefer small state machines over recursive algorithms. This page synthesizes distributor pricing, drop-in alternatives from the PIC16F610/616 family, and practical design notes for 12 V direct-supply designs not consolidated in any single manufacturer document.

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PIC16HV610-I/SL - 8-bit 20MHz MCU 1.75KB Flash | Microchip
PIC16HV610-I/SL

PIC16HV610-I/SL - 8-bit 20MHz MCU 1.75KB Flash | Microchip

The Microchip Technology PIC16HV610-I/SL is an 8-bit PIC16-family flash microcontroller with an integrated shunt voltage regulator, delivering up to 20 MHz CPU performance from 1.75 KB of flash program memory in a 14-pin SOIC (SL) package. The 'HV' variant includes an internal high-voltage shunt regulator that allows direct connection to supplies up to 15 V without an external regulator, simplifying off-line and battery-stack designs. What is an 8-bit microcontroller? An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (Flash/ROM), data memory (RAM), and peripherals on one die. Within the embedded hierarchy, PIC16 MCUs sit below PIC18/PIC24 and above baseline PIC10/12 devices, balancing code density (14-bit instruction word), peripheral count, and cost for cost-sensitive control applications. Key features include 64 bytes of RAM, 11 digital I/O pins with interrupt-on-change capability, an 8-channel 10-bit ADC, two analog comparators, a hardware timer0/timer1/timer2 set, and a built-in 5-bit DAC on the comparator reference. The integrated shunt regulator accepts input voltages from 2 V (at 8 MHz) up to 15 V (via shunt), eliminating the need for an external 5 V LDO in many mains-derived designs. Typical applications include LED driver controllers, battery chargers, smoke and CO detectors, mains-powered sensor interfaces, and off-line appliance control. Designers favor the HV610 series for its ability to operate directly from rectified mains via a Zener/shunt arrangement, reducing BOM cost by one or two external regulators. When designing with the PIC16HV610, choose between the SL (SOIC-14) and ML (QFN-20) packages based on board area constraints. Always place the shunt regulator's series resistor to limit current to the datasheet-specified maximum and add bulk decoupling on the regulated rail. A free MPLAB X IDE with XC8 compiler supports the device for code development and debug.

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PIC16HV610-I/ST - 8-Bit MCU 20MHz 1.75KB Flash | Microchip
PIC16HV610-I/ST

PIC16HV610-I/ST - 8-Bit MCU 20MHz 1.75KB Flash | Microchip

The Microchip Technology PIC16HV610-I/ST is an 8-bit PIC® 16F-family flash microcontroller with an integrated high-voltage shunt regulator, delivering 20MHz CPU performance from 1.75KB (1K x 14) of on-chip Flash program memory in a 14-pin TSSOP package. The "HV" prefix indicates a built-in 2.5V-15V shunt voltage regulator that allows the part to operate directly from high-voltage supplies — typically 3.5V to 15V — without an external regulator on the power pin. A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (Flash/ROM), data memory (RAM), and a fixed set of peripherals such as timers, comparators, ADCs, and I/O ports. PIC microcontrollers sit within the broader taxonomy of microcontroller -> embedded controller -> integrated circuit -> semiconductor. The PIC16HV610-I/ST belongs to Microchip's mid-range 14-bit instruction word PIC16 family, optimized for low-cost, deterministic embedded control. Key features include 64 bytes of RAM, 12 I/O pins, one 8-bit and one 16-bit timer, an analog comparator, and a 4-channel 10-bit ADC (per datasheet). The integrated high-voltage shunt regulator eliminates external components in mains-derived or battery-stack designs, making this device especially attractive for cost-sensitive white goods, lighting controls, and power-supply front-end controllers. In-system programming via ICSP supports field firmware updates. Typical applications include capacitive-touch user interfaces, LED lighting controllers, sensor signal conditioning, low-power remote controls, and primary-side regulation in AC/DC and DC/DC switch-mode power supplies. The wide operating voltage range (2.0V to 15V for logic) supports direct connection to rectified mains or to multi-cell battery stacks. For design considerations, ensure the shunt regulator current is properly derated for worst-case input voltage, and account for the ICSP/PGD/PGC pin sharing when laying out the PCB. This page synthesizes distributor pricing, parametric comparison with same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16HV610T-I/ML - 1.75KB Flash 8-Bit MCU with Shunt Regulator | Microchip
PIC16HV610T-I/ML

PIC16HV610T-I/ML - 1.75KB Flash 8-Bit MCU with Shunt Regulator | Microchip

The Microchip Technology PIC16HV610T-I/ML is a 14-pin, Flash-based 8-bit CMOS microcontroller from the PIC16 family, integrating a high-voltage shunt regulator on-chip and housed in a QFN-16 package. Operating up to 20 MHz with 1.75 KB (1K x 14) of Flash program memory and 64 bytes of SRAM, it is engineered for cost-sensitive embedded control nodes that operate directly from a high-voltage rail without an external LDO. The 'HV' family integrates a parallel shunt regulator across the VDD pins, allowing the device to run from inputs as high as the absolute maximum VDD rating while dissipating excess voltage through an external Zener reference. A microcontroller (MCU) is an integrated circuit that combines a CPU core, non-volatile program memory (Flash or ROM), volatile data memory (RAM), and a configurable set of peripherals (timers, ADC, comparators, PWM, communication interfaces) into a single silicon die. The PIC16 mid-range core is one of the foundational 8-bit architectures in the Microchip portfolio, classed within the broader category of microcontrollers -> microcontrollers and microprocessors -> semiconductors -> integrated circuits. Flash-based variants allow in-system re-programming, which makes the PIC16HV610 well-suited for designs that must be firmware-updated in the field. Key features of the PIC16HV610 include a 10-bit ADC with 8 channels, one 8-bit and one 16-bit timer, an enhanced PWM module, an analog comparator with selectable reference, internal 4 MHz and 31 kHz oscillators, and 11 GPIO pins. The device supports in-circuit serial programming (ICSP) and runs across an industrial -40C to +85C temperature range, drawing only a few hundred microamps of quiescent current at low clock rates. The integrated shunt regulator enables direct battery-monitor and battery-stack powered designs that would otherwise require a discrete LDO, reducing BOM cost and PCB area. Typical applications for the PIC16HV610T-I/ML include battery chargers, multi-cell battery monitors, smoke and CO detectors, AC line-powered sensor interfaces, LED lighting controllers, small appliance control, and remote controls. Designers favor this part where a high-voltage supply is already present and a dedicated regulator would consume excessive quiescent current. The QFN-16 package provides a small footprint suitable for compact consumer and industrial products. When designing with this part, place a low-ESR decoupling capacitor close to each VDD pin and ensure the shunt Zener reference resistor is sized to carry worst-case load plus the MCU current at the chosen VDD target. The QFN exposed pad should be soldered to a copper pour to meet thermal and electrical ground requirements. This page combines datasheet-derived specifications, drop-in alternatives in the same QFN-16 footprint, and practical design notes not assembled on the standard distributor listing.

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PIC16HV610T-I/ST - 8-bit MCU, 1.75KB Flash, 64B RAM, HV 15V | TSSOP-14 | Microchip
PIC16HV610T-I/ST

PIC16HV610T-I/ST - 8-bit MCU, 1.75KB Flash, 64B RAM, HV 15V | TSSOP-14 | Microchip

The Microchip Technology PIC16HV610T-I/ST is an 8-bit PIC RISC flash microcontroller in a 14-pin TSSOP package, featuring an integrated high-voltage shunt regulator that allows direct operation from supplies as high as 15V. It offers 1.75 KB of self-programmable flash program memory, 64 bytes of SRAM, 128 bytes of EEPROM, a 10-bit ADC, and 12 I/O pins. A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, RAM, peripherals, and I/O. The PIC16HV610 belongs to the mid-range PIC16 family of 8-bit microcontrollers, characterized by an enhanced 14-bit instruction set, single-cycle hardware multiply (for select variants), and low-power nanoWatt technology. It sits in the hierarchy: 8-bit MCU -> PIC16 family -> mid-range core -> CMOS flash microcontroller -> embedded computing. This high-voltage variant eliminates external 5V regulators in 12V automotive and industrial applications. Key features include a maximum clock speed of 20 MHz, an internal 8 MHz oscillator, an enhanced PWM module, a comparator module, and a 10-bit ADC with up to 8 channels. The high-voltage shunt regulator eliminates the need for an external 5V LDO when the device is powered from 9V-15V rails, reducing BOM cost in automotive and industrial designs. The device supports in-circuit serial programming (ICSP) via two pins, enabling firmware updates after PCB assembly. The PIC16HV610 architecture employs a Harvard bus with separate program and data paths, a 14-bit instruction word, and an 8-level hardware stack. The flash program memory supports 100,000 erase/write cycles and 40-year retention typical. On-chip debug is available through the ICSP interface, allowing breakpoint-based development with Microchip's MPLAB X IDE and ICD debuggers. Typical applications include automotive body controllers, sensor signal conditioning, 12V-powered LED drivers, industrial control loops, and battery monitoring. The 15V shunt regulator input makes it ideal for direct connection to automotive 12V buses without external voltage translation. When designing with this device, ensure the shunt regulator current is sized for the worst-case load plus margin, and route the analog AVCC/DAC reference pins with ground isolation. The TSSOP-14 footprint is also pin-compatible with the standard-voltage PIC16F610 for 5V-only designs. This page synthesizes distributor pricing, drop-in alternatives within the PIC16F610/616/610/616 family, and practical design notes that are not duplicated on the manufacturer datasheet cover page.

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PIC16HV616-E/ML - 8-Bit 20MHz MCU 3.5KB Flash | Microchip
PIC16HV616-E/ML

PIC16HV616-E/ML - 8-Bit 20MHz MCU 3.5KB Flash | Microchip

The Microchip Technology PIC16HV616-E/ML is an 8-bit Flash-based CMOS microcontroller from the PIC16 family, featuring 3.5KB (2K x 14) of Flash program memory, 128 bytes of RAM, and a maximum CPU clock of 20MHz in a 16-pin QFN (4x4 mm) exposed-pad package. It belongs to the PIC16F610/616/HV610/HV616 device group, distinguished by its integrated shunt regulator (HV suffix) that allows direct operation from high-voltage supplies up to 15V without an external LDO. A microcontroller (MCU) is a single-chip computer containing a processor core, non-volatile program memory, volatile data memory, and programmable I/O peripherals. The PIC16 family uses a RISC-based Harvard architecture with a 14-bit instruction word and is aimed at cost-sensitive embedded control. Within the PIC taxonomy, the PIC16HV616 sits below the PIC18 and dsPIC families in capability but above baseline PIC10/12 devices in peripheral integration. Microchip's mid-range 8-bit cores are widely deployed in appliance controls, sensor interfaces, lighting ballasts, and battery-powered nodes where deterministic real-time response and low quiescent current matter more than raw throughput. Key differentiating specifications include 3.5KB self-programmable Flash (100K erase/write cycles typical), 128 bytes SRAM, an internal 8MHz high-speed oscillator, an integrated 5-bit DAC and 10-bit ADC with up to 8 channels, two 8-bit timers plus one 16-bit timer, an enhanced PWM/Capture/Compare module, an on-chip voltage reference, and a unique shunt regulator capable of supplying the internal 3.3V logic from a 2V-15V supply rail. The integrated HV shunt eliminates an external LDO, reducing BOM cost and PCB area in 12V-15V industrial and automotive subsystems. Architecturally the device uses Microchip's enhanced mid-range core (49 instructions, 16-level hardware stack) with a 14-bit program word and 8-bit data path. The high-voltage shunt regulator uses a Zener-referenced pass element that clamps excess input voltage as heat, so thermal management at the exposed pad is important for HV variants. The ADC supports an internal bandgap reference plus an external Vref+ pin, and the comparator has a programmable on-chip reference for analog signal conditioning without external resistors. Typical applications include 12V-15V industrial sensor nodes, automotive courtesy and lighting modules, LED lighting ballasts, smoke and gas detector signal chains, white-goods control boards, and battery charging monitors. The wide VIN range and integrated shunt make the HV616 particularly useful wherever a regulated 3.3V rail is needed from a noisy or unregulated 12V bus. When designing with this device, place a low-ESR ceramic bypass cap directly on VDD and use a low-impedance trace on the shunt shunt to the input rail. The exposed thermal pad must be soldered to a sufficiently large copper pour to dissipate the shunt regulator's power loss; expect roughly (VIN - 3.3V) x ISHUNT of heat that must flow through the PCB. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16HV616-E/P - 8-Bit MCU, 3.5KB Flash, 20MHz | Microchip
PIC16HV616-E/P

PIC16HV616-E/P - 8-Bit MCU, 3.5KB Flash, 20MHz | Microchip

The Microchip Technology PIC16HV616-E/P is an 8-bit PIC RISC microcontroller featuring 3.5KB Flash program memory, 128 bytes RAM, and an integrated high-voltage shunt regulator, all housed in a 14-pin PDIP through-hole package. It operates at up to 20MHz clock speed with a 14-bit instruction set, 35 instructions, and supports operating voltages of 2.0V to 5.5V with the HV variant enabling direct connection to 3.5V-15V supplies. A microcontroller (MCU) is a single-chip computer containing a CPU, memory (Flash/RAM/EEPROM), and programmable I/O peripherals. The PIC16HV616 belongs to Microchip's PIC16 mid-range family, positioned in the taxonomy: PIC16HV616 -> PIC16F616 (low-voltage cousin) -> PIC16F family -> 8-bit PIC -> PIC microcontroller -> MCU -> embedded processor. The HV prefix denotes the integrated shunt voltage regulator that lets the device operate directly from higher-voltage buses. Key features include 12 I/O pins, an 8-channel 10-bit ADC, two comparators, enhanced PWM module, and an internal 8MHz oscillator. The integrated HV shunt regulator eliminates the need for an external 5V LDO when powered from 12V or higher rails - a significant BOM cost and board-space saver in cost-sensitive designs. The device also includes nanoWatt power management for low-power sleep modes down to sub-microamp currents. Architecturally, the PIC16HV616 uses a Harvard RISC core with separate program and data buses, allowing simultaneous instruction fetch and operand access in a single cycle (except for branches). The high-voltage shunt regulator is implemented as a parallel (shunt) element rather than a series LDO, providing robust overvoltage tolerance at the cost of continuous quiescent dissipation. This topology suits battery charging, LED string driving, and other applications where a series regulator is impractical. Typical applications include 12V LED lighting controllers, battery management, capacitive-touch user interfaces, motor control loops, and low-cost consumer appliances. The wide input voltage tolerance and small footprint make it ideal for distributed nodes in industrial sensor networks. When designing with this device, verify the shunt regulator's power dissipation budget (VIN - 5V) * I_LOAD + I_QUIESCENT, since the shunt element must sink the worst-case excess current while keeping the regulated rail within tolerance.

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PIC16HV616-E/SL - 8-Bit 20MHz MCU 3.5KB Flash HV | Microchip
PIC16HV616-E/SL

PIC16HV616-E/SL - 8-Bit 20MHz MCU 3.5KB Flash HV | Microchip

The Microchip Technology PIC16HV616-E/SL is an 8-bit Flash-based CMOS microcontroller with an integrated shunt regulator, designed for high-voltage (HV) operation directly from battery or rectified mains rails. It features 3.5KB (2K x 14) of Flash program memory, 128 bytes of RAM, and operates at up to 20 MHz across an industrial temperature range. The device is housed in a 14-pin SOIC (SL) package and is part of the PIC16HV616 mid-range MCU family with on-chip high-voltage support. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable I/O peripherals. The PIC16HV616 belongs to the broader category of 8-bit microcontrollers, sitting under the hierarchy of embedded microcontrollers, microprocessors, and finally semiconductors. The 'HV' family is a specialized subset that includes an internal shunt regulator, allowing direct connection to unregulated high-voltage DC supplies without an external LDO - a feature that simplifies power supply design in cost-sensitive applications. Key features include an internal 8 MHz high-speed oscillator with PLL option to reach 20 MHz, a 10-bit Analog-to-Digital Converter (ADC) with up to 8 channels, dual comparators, and a 16-bit PWM module. The integrated shunt regulator supports supply voltages up to 15V, eliminating the need for an external voltage regulator in many designs. Additional peripherals include an Enhanced Universal Synchronous Asynchronous Receiver Transmitter (EUSART), I2C/SPI, and a 16-bit timer with capture/compare. The PIC16HV616's enhanced mid-range core delivers 49 instructions with 16-level hardware stack and interrupt capability. The architecture provides deterministic instruction execution of 200 ns per instruction at 20 MHz, making it suitable for real-time control loops. The internal oscillator calibration eliminates external crystals in many designs, reducing BOM cost and PCB area. The 14-bit instruction word and Harvard architecture separate program and data memory paths for predictable real-time response. Typical applications include LED lighting drivers, battery chargers, motor control in small appliances, smart sensor nodes, and industrial control modules. The wide operating voltage range makes it particularly suitable for 12V automotive, 24V industrial, and offline rectified supplies where an integrated regulator simplifies design. Designers also use the PIC16HV616 in capacitor discharge circuits and energy-harvesting systems that require direct HV input capability. When designing with this part, note that the shunt regulator dissipates excess voltage as heat - at 15V supply and 10 mA load, expect up to 150 mW dissipation that must be accounted for in thermal calculations. The 14-pin SOIC package provides 12 GPIO pins with multiplexed peripheral functions, allowing flexible pin assignments but requiring careful peripheral-to-pin mapping during firmware development. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet, providing engineers with a single source for selection, sourcing, and design-in guidance for the PIC16HV616-E/SL.

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PIC16HV616-I/P - 8-bit MCU 3.5KB Flash 20MHz | Microchip
PIC16HV616-I/P

PIC16HV616-I/P - 8-bit MCU 3.5KB Flash 20MHz | Microchip

The Microchip Technology PIC16HV616-I/P is an 8-bit RISC flash microcontroller with integrated high-voltage shunt regulator support, packaged in a 14-pin PDIP through-hole format. The device features 3.5KB (2K x 14) of Flash program memory, 128 bytes of RAM, and executes instructions at speeds up to 20MHz, delivering up to 5 MIPS of throughput. The 'HV' suffix denotes the high-voltage variant that includes an internal shunt regulator suitable for applications operating directly from a 3.5V to 15V supply without external regulation. What is a PIC microcontroller? A PIC (Peripheral Interface Controller) microcontroller is a family of 8/16/32-bit RISC-based microcontrollers from Microchip Technology built on a Harvard architecture with separate program and data buses. Within the PIC taxonomy, the PIC16HV616 belongs to the mid-range PIC16F family, which provides a balance of cost, peripheral integration, and code efficiency for embedded control tasks. Key features include 12 I/O pins, three timers, two analog comparators, a 10-bit PWM module, a 10-bit ADC, Brown-Out Detect (BOD), Power-On Reset (POR), and a Watchdog Timer (WDT). The integrated high-voltage shunt regulator allows direct connection to unregulated 12V supplies, simplifying power architecture in appliance and industrial applications. The PIC16HV616 uses a 14-bit instruction word with a RISC instruction set optimized for C and assembly code density. Its nanoWatt technology provides flexible power management with multiple idle and sleep modes, enabling extended battery life in low-duty-cycle applications. The internal oscillator reduces BOM cost by eliminating the need for external clock components in many designs. Typical applications include LED lighting controls, battery chargers, SMPS primary-side control, fan speed controllers, small appliance controls, and battery-powered sensor interfaces. The high-voltage capability makes it especially suitable for 12V-24V system designs where a separate regulator would otherwise be required. When designing with this device, ensure the shunt regulator configuration matches the supply voltage range. The internal shunt regulator requires proper sizing of the external dropping resistor to limit current at minimum VIN. Refer to the Microchip datasheet 41288F for shunt regulator application circuits and thermal considerations. This page synthesizes distributor pricing, drop-in alternative MPNs, and practical design notes not found on any single distributor page, helping engineers evaluate the PIC16HV616-I/P against same-package drop-in equivalents and cross-family alternatives.

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PIC16HV616-I/ST - 8-Bit 20MHz MCU 4KB Flash | TSSOP-14
PIC16HV616-I/ST

PIC16HV616-I/ST - 8-Bit 20MHz MCU 4KB Flash | TSSOP-14

The Microchip Technology PIC16HV616-I/ST is an 8-bit Flash-based CMOS microcontroller in a 14-pin TSSOP package, featuring an integrated shunt regulator that allows direct operation from a 2V to 5V supply without a separate voltage regulator. The device integrates 4KB (2K x 14 words) of Flash program memory, 128 bytes of RAM, and 256 bytes of EEPROM, with a 20MHz internal oscillator and Microchip's enhanced mid-range core with 35 instructions and 8 stack levels. Its peripheral set includes a user-configurable comparator with hysteresis, an Enhanced Universal Synchronous Asynchronous Receiver Transmitter (EUSART), an MSSP module supporting SPI and I2C, up to 11 I/O pins with 25mA source/sink capability, and an internal 4/8MHz oscillator selectable via configuration bits. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable I/O peripherals on one die. The PIC16HV616 belongs to the Microchip PIC16 enhanced mid-range family, which sits in the 8-bit microcontrollers -> microcontrollers -> embedded ICs -> integrated circuits taxonomy and is widely deployed for low-cost, low-power deterministic control. The HV suffix denotes the integrated shunt regulator that converts a wide input voltage to the chip's internal logic supply. Key differentiating specifications include the on-chip shunt regulator (eliminating the need for an external LDO in many battery and bus-powered applications), 25mA high-current I/O for direct LED or relay driving, the user-configurable comparator with internal reference and hysteresis, and a wide supply range of 2.0V to 5.5V. The 8-bit Enhanced Mid-Range core delivers deterministic interrupt response and single-cycle instruction execution on this device family. Typical applications include LED lighting controllers, battery chargers, sensor signal conditioning, simple sensor nodes, and low-power IoT endpoints where the integrated shunt regulator simplifies the power tree. The high-current 25mA I/O also makes the part attractive for driving LEDs, relays, or small solenoids directly without external driver transistors. According to the manufacturer datasheet, the PIC16HV616 family is part of Microchip's enhanced mid-range 8-bit portfolio optimized for cost-sensitive embedded control. When designing with this part, ensure the shunt regulator resistor RVDD is sized to provide at least 5mA of bias current (typically 100kohm to VDD) and to limit shunt current under worst-case input voltage conditions. The comparator output can be routed internally to timers for advanced capture/compare functions, eliminating external glue logic. This page synthesizes distributor pricing, drop-in TSSOP-14 alternatives, and practical design notes not found in the standalone manufacturer datasheet.

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PIC16HV616T-I/ML - 8-bit MCU, 20MHz, 3.5KB Flash, 16-QFN | Microchip
PIC16HV616T-I/ML

PIC16HV616T-I/ML - 8-bit MCU, 20MHz, 3.5KB Flash, 16-QFN | Microchip

The Microchip Technology PIC16HV616T-I/ML is an 8-bit RISC microcontroller IC with 20 MHz CPU speed, 3.5 KB (2K x 14) of Flash program memory and 128 bytes of RAM, housed in a 16-pin QFN (4x4 mm) package with industrial temperature grade (-40C to +85C). It belongs to Microchip's PIC16HV616 family, the "HV" prefix denoting an integrated high-voltage shunt regulator that allows direct operation from a 2V to 5V supply without an external regulator, simplifying low-power and battery-fed designs. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, peripherals and I/O on one silicon die. Within the broader taxonomy, the PIC16HV616 sits at: PIC microcontroller -> mid-range 8-bit PIC -> enhanced mid-range core -> embedded microcontroller -> semiconductor IC. Its RISC (Reduced Instruction Set Computer) Harvard architecture separates program and data buses, allowing simultaneous instruction fetch and data access for deterministic 20 MHz throughput. Key features that distinguish this part include 12 I/O pins with interrupt-on-change support, an internal 8 MHz oscillator (calibrated for +/-1% accuracy), 10-bit ADC with up to 8 channels, two 8-bit timers plus a 16-bit timer, an enhanced PWM module with complementary outputs, an analog comparator with rail-to-rail inputs, and the on-chip HV shunt regulator. Memory endurance is rated at 100K erase/write cycles and data EEPROM retention is 40 years minimum. Typical applications include low-power battery chargers, LED lighting drivers, smoke detectors, remote controls, smart sensors, and IoT edge devices that need a few pins and a small footprint. The 4x4 mm QFN package is footprint-compatible with other PIC16F6xx family members, easing PCB migration between pin-counts. When designing with this device, ensure that the GP3/MCLR pin is correctly biased (internal pull-up enabled by default) and that unused I/O are configured as outputs to minimize sleep current. Decoupling VDD with a 0.1 uF ceramic capacitor placed within 3 mm of the pin is required for ADC accuracy. This page synthesizes distributor pricing, application guidance and drop-in alternative analysis not found in the standalone Microchip datasheet, providing engineers with a single reference for sourcing and substitution decisions.

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