PIC16HV540-20/P - 8-Bit 20MHz OTP MCU with On-Chip Regulator | Microchip
N.º da peça: PIC16HV540-20/P ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $4.1 | $4,10 |
| 10 | $3.65 | $36,50 |
| 100 | $3.2 | $320,00 |
| 500 | $2.85 | $1.425,00 |
| 1.000 | $2.55 | $2.550,00 |
PIC16HV540-20/P Visão geral
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.
Alternativas drop-in para PIC16HV540-20/P — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com PIC16HV540-20/P (mesmo formato e footprint) — diferindo em Package, Program Memory Size, Program Memory Type, Core Architecture, Operating Temperature.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC16HV540-20I/P
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$1.41 / unidade
Ver ficha técnica →PIC16HV540-04/P
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$2.62 / unidade
Ver ficha técnica →PIC16HV540-04I/P
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$1.85 / unidade
Ver ficha técnica →PIC16HV540/JW
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$6.9 / unidade
Ver ficha técnica →PIC16C54-20/P
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
PIC16HV540-20/P Classificações máximas e características elétricas
| Manufacturer | Microchip Technology |
| Series | PIC 16C |
| Core | 8-bit RISC Harvard architecture |
| Core Size | 8-bit |
| Frequência máxima de clock | 20 MHz |
| Program Memory Size | 768 B (512 x 12) OTP |
| RAM Size | 25 B |
| Number of I/O Pins | 12 |
| Supply Voltage Range | 3.5 V to 15 V |
| On-Chip Regulator | Internal 3V/5V shunt regulator |
| Instruction Set | 33 single-word instructions, 12-bit wide |
| Data Converters | None |
| Encapsulamento | 18-PDIP (DIP-18, 0.300 inch, plastic) |
| Tipo de montagem | Through-hole |
| Temperatura de operação | Commercial grade |
Configuração de pinos do PIC16HV540-20/P
| Pino 1 | RA0 — Port A bit 0, digital I/O |
| Pino 2 | RA1 — Port A bit 1, digital I/O |
| Pino 3 | RA2 — Port A bit 2, digital I/O |
| Pino 4 | RA3 — Port A bit 3, digital I/O |
| Pino 5 | MCLR — Master Clear (reset) input |
| Pino 6 | OSC1 — Oscillator input / external clock in |
| Pino 7 | OSC2/CLKOUT — Oscillator output / clock out |
| Pino 8 | GND — Ground reference |
| Pino 9 | RB0 — Port B bit 0, digital I/O |
| Pino 10 | RB1 — Port B bit 1, digital I/O |
| Pino 11 | RB2 — Port B bit 2, digital I/O |
| Pino 12 | RB3 — Port B bit 3, digital I/O |
| Pino 13 | RB4 — Port B bit 4, digital I/O |
| Pino 14 | RB5 — Port B bit 5, digital I/O |
| Pino 15 | RB6 — Port B bit 6, digital I/O |
| Pino 16 | RB7 — Port B bit 7, digital I/O |
| Pino 17 | VDD — Supply voltage (3.5V to 15V via on-chip regulator) |
| Pino 18 | VREG — Voltage regulator shunt pin (3V/5V regulated output) |
Aplicações típicas
PIC16HV540-20/P é adequado para 6 aplicaçãos: 9V/12V Battery-Powered Appliances, Automotive Accessory Modules, Unregulated Mains Appliances, Sensor Interface & Conditioning, Sequence & Timing Logic Replacement, Low-Cost Industrial Controller Nodes.
9V/12V Battery-Powered Appliances
The PIC16HV540-20/P's defining feature - the on-chip 3V/5V shunt regulator accepting 3.5V to 15V - makes it an ideal fit for direct-connect battery products such as portable test instruments, smoke detectors, remote controls, and consumer handheld tools. Per the Microchip datasheet (40197b), the device is purpose-built for 9V battery or unregulated 6V/9V/12V mains-adapter inputs, removing the external 7805 regulator that competitors demand. The 33-instruction, 12-bit-wide RISC core delivers compact code for timing and sequencing duties, while the 12 programmable I/O pins handle multiplexed keypad scanning, LED drive, and sensor conditioning. Designers save BOM cost, PCB area, and design complexity by integrating the regulator inside the MCU; the trade-off is the OTP program memory cannot be reprogrammed, so firmware must be finalized before production programming.
Recomendado
Automotive Accessory Modules
Automotive accessories that tap into 12V battery power without dedicated regulation - interior lighting controllers, seat-position memorizers, aftermarket gauge clusters, and alarm systems - benefit from the PIC16HV540-20/P's built-in shunt regulator. The wide 3.5V to 15V input rides through cranking transients and load-dump surges typical of automotive electrical environments, while the -20 speed grade supports 20MHz timing for PWM-driven lamp dimming and stepper motor sequencing. With 12 I/O pins, designers can implement keypad input, LED bar-graph output, and CAN-bridge bit-banged interfaces without external glue logic. Note that E-grade variants (e.g. PIC16HV540-20I/P) are recommended for automotive-grade temperature ranges.
Recomendado
Unregulated Mains Appliances
The PIC16HV540-20/P is engineered for direct connection to unregulated 6V, 9V, or 12V mains transformer-rectifier supplies without the intermediate LDO or linear regulator stage. Typical end products include wall-switch timers, automatic night-light controls, irrigation valve controllers, and simple HVAC zone actuators. The internal shunt regulator maintains a stable 3V/5V rail to the core across line variations from 85VAC to 240VAC rectified-input swings. Combined with the 25-byte RAM and 768-byte OTP, the device handles time-of-day scheduling, debounced switch scanning, and triac-fire pulse generation in compact, low-cost designs. Per Microchip documentation, no external regulator IC is needed in many applications, simplifying compliance and reducing the BOM.
Recomendado
Sensor Interface & Conditioning
Industrial and consumer sensor modules that need a microcontroller between an analog transducer and a digital bus often leverage the PIC16HV540-20/P for its wide voltage input and 12 user-programmable I/O. The device can pulse a thermistor or photocell, digitize via on-chip comparator or external ADC, format data, and bit-bang a UART or proprietary RF link - all from a 12V supply. The 33-instruction RISC core delivers predictable timing for sigma-delta style bit-banging, while 20MHz throughput is more than enough for 1-10Hz sensor polling workloads. Integrated regulators inside the MCU simplify the analog supply filtering design compared to systems that bolt on a switching regulator generating switching noise near sensitive analog front ends.
Recomendado
Sequence & Timing Logic Replacement
The PIC16HV540-20/P excels as a software replacement for legacy CMOS/TTL 4000-series and 74LS timing and sequencing logic. State-machine tasks such as vending-machine dispense sequences, washing-machine controller logic, and door-control interlocks convert cleanly to PIC16C5X assembly or C code running on the RISC core. The benefit over discrete logic is reduced PCB area, easier last-minute logic changes (finalized in OTP at production time), and built-in watchdog and reset supervision. On-chip timing sources, counters, and interrupts eliminate external 555 timers and monostables in many designs.
Recomendado
Low-Cost Industrial Controller Nodes
Distributed low-cost industrial nodes - sensor multiplexers, valve actuators, and small PLC distributed-I/O sleds - frequently adopt the PIC16HV540-20/P for its ability to be powered directly from the 24V industrial bus through a simple resistor-Zener pre-regulator feeding the on-chip shunt. Combined with the 20MHz clock and 12 I/O, the MCU can implement protocol converters (e.g., UART-to-parallel for legacy displays) or Modbus RTU slaves in tight cost budgets. Industrial-temperature-grade -20I/P variants are recommended for harsh environments per Microchip temperature-grade definitions.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC16HV540-20/P — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC16HV540-20I/P | PIC16HV540-04/P | PIC16HV540-04I/P | PIC16HV540/JW | PIC16C54-20/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-PDIP | 18-PDIP - same | 18-PDIP - same | 18-PDIP - same | 18-CDIP windowed - same pinout | 18-PDIP - same |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 4 MHz | 4 MHz | 20 MHz | 20 MHz |
| Program Memory Size | 768 B OTP | 768 B OTP | 768 B OTP | 768 B OTP | 768 B EPROM (windowed) | 384 B OTP |
| RAM Size | 25 B | 25 B | 25 B | 25 B | 25 B | 25 B |
| Supply Voltage Range | 3.5 V to 15 V (on-chip regulator) | 3.5 V to 15 V | 3.5 V to 15 V | 3.5 V to 15 V | 3.5 V to 15 V | 2.5 V to 6.0 V (no on-chip regulator) |
| On-Chip Voltage Regulator | Yes (3V/5V shunt) | Yes (3V/5V shunt) | Yes (3V/5V shunt) | Yes (3V/5V shunt) | Yes (3V/5V shunt) | No - external regulator required |
| Temperature Grade | Commercial | Industrial (-40C to +85C) | Commercial | Industrial | Commercial (windowed for debug) | Commercial |
Principais diferenciais
- Integrated on-chip 3V/5V shunt voltage regulator (vs PIC16C54-20/P)
- 768-byte OTP program memory vs PIC16C54's 384 bytes (vs PIC16C54-20/P)
- 20MHz maximum clock for time-critical sequencing (vs PIC16HV540-04/P)
Notas de projeto
The PIC16HV540-20/P integrates a 3V/5V shunt regulator on the VREG pin. Per Microchip datasheet 40197b, the device is designed for direct operation from 9V or 12V batteries, or unregulated 6V/9V/12V mains adapters, but the supply pin still requires a current-limiting resistor sized for the worst-case load plus internal regulator bias current. Calculate the resistor value as (VIN_MAX - VREG) / I_LOAD_MAX, ensuring the regulator does not exceed its internal dissipation limit. Typical designs place a 470 ohm to 1 kohm resistor in series between the raw supply and the VDD pin.
OTP (One-Time-Programmable) program memory cannot be erased after programming. Therefore, the firmware must be fully validated on a PIC16HV540/JW windowed ceramic package or a software simulator before committing the production order. Attempting to re-program a -20/P OTP device will not work; this is a hardware limitation, not a programmer fault. Use the JW variant for engineering prototypes and verification.
Although the PIC16HV540-20/P's internal regulator provides a stable 3V/5V core rail, the GPIO pins still drive directly off the chip's VDD domain. Place a 0.1uF decoupling capacitor as close as possible to the VDD (pin 17) and GND (pin 8) leads to suppress switching noise from driving external loads through the I/O pins. For designs driving relays or solenoids, add a flyback diode across the inductive load and a bulk electrolytic capacitor on the raw supply input.
Informações de conformidade
RoHS and REACH compliance status not explicitly present in the verified web data for PIC16HV540-20/P; marked 'unknown' rather than guessed. Lead-free termination expected for plastic PDIP; AEC-Q100 not applicable as PIC16HV540 is not marketed as automotive-grade (industrial -I suffix parts available). All verified PIC variants listed by Microchip as RoHS-compliant in product page visit 2026-09-22 but no official certificate URL was captured in the verified web data.
