PIC16HV540-20I/SO - 8-Bit 20MHz OTP MCU with Shunt Regulator
Артикул: PIC16HV540-20I/SO ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $2.34 | $2,34 |
| 10 | $2.11 | $21,10 |
| 100 | $1.87 | $187,00 |
| 500 | $1.62 | $810,00 |
| 1.000 | $1.39 | $1.390,00 |
PIC16HV540-20I/SO Обзор
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.
Аналоги без доработки для PIC16HV540-20I/SO — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с PIC16HV540-20I/SO (тот же форм-фактор и посадочное место) — отличается по Core Architecture, Program Memory Size, Program Memory Type, Watchdog Timer, Operating Temperature.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
PIC16HV540-04I/SO
✅ Прямая замена✓ В наличии
$1.78 / шт.
Открыть даташит →PIC16HV540T-20I/SO
✅ Прямая замена ⚠️ Характеристики не проверены✓ В наличии
$1.44 / шт.
Открыть даташит →PIC16HV540-20I/P
✅ Прямая замена✓ В наличии
$1.41 / шт.
Открыть даташит →PIC16HV540-20I/SO Максимальные параметры и электрические характеристики
| Core Architecture | PIC16C5x enhanced, 8-bit RISC |
| Instruction Set | 33 single-word instructions, 12-bit wide |
| Instruction Cycle | 200 ns at 20 MHz |
| Program Memory | 768 B (512 x 12) OTP EPROM |
| RAM | 25 B |
| Data EEPROM | None (OTP only) |
| Operating Frequency | 20 MHz maximum |
| I/O Pins | 12 bidirectional |
| Timers | 1 x 8-bit Timer0 with programmable prescaler |
| Watchdog Timer | Yes, hardware WDT with shared prescaler |
| On-chip Voltage Regulator | Shunt regulator (operates from 5V, 9V, or 12V supplies) |
| Interrupt Sources | External INT, timer overflow, WDT |
| Operating Voltage | 3.5 V to 15 V (with on-chip shunt regulator) |
| Рабочая температура | -40 C to +85 C (Industrial) |
| Корпус | 18-pin SOIC (SO) |
| Тип монтажа | Surface Mount |
| Уровень MSL | 1 (unlimited) |
| Статус RoHS | Compliant |
Конфигурация выводов PIC16HV540-20I/SO
| Контакт 1 | RA2 — Bidirectional I/O pin, PORTA bit 2 |
| Контакт 2 | RA3 — Bidirectional I/O pin, PORTA bit 3 |
| Контакт 3 | RTCC — Timer0 real-time clock/counter external input |
| Контакт 4 | MCLR — Master clear reset, active-low (programming VPP) |
| Контакт 5 | VSS — Ground reference |
| Контакт 6 | RB0 — Bidirectional I/O pin, PORTB bit 0 |
| Контакт 7 | RB1 — Bidirectional I/O pin, PORTB bit 1 |
| Контакт 8 | RB2 — Bidirectional I/O pin, PORTB bit 2 |
| Контакт 9 | RB3 — Bidirectional I/O pin, PORTB bit 3 |
| Контакт 10 | RB4 — Bidirectional I/O pin, PORTB bit 4 |
| Контакт 11 | RB5 — Bidirectional I/O pin, PORTB bit 5 |
| Контакт 12 | RB6 — Bidirectional I/O pin, PORTB bit 6 |
| Контакт 13 | RB7 — Bidirectional I/O pin, PORTB bit 7 |
| Контакт 14 | VDD — Positive supply, on-chip shunt regulator input (5V/9V/12V) |
| Контакт 15 | OSC2 — Oscillator output, crystal/RC connection |
| Контакт 16 | OSC1 — Oscillator input, crystal/RC/external clock |
| Контакт 17 | RA0 — Bidirectional I/O pin, PORTA bit 0 |
| Контакт 18 | RA1 — Bidirectional I/O pin, PORTA bit 1 |
Типичное применение
PIC16HV540-20I/SO подходит для 6 применениеs: 12V Industrial Logic Replacement, Automotive Interior Lighting and HVAC Actuator, Battery Charger Controller for SLA Cells, Capacitive Touch Front Panel Controller, Sensor Signal Conditioning Front End, White Goods Appliance Controller.
12V Industrial Logic Replacement
Direct drop-in for discrete logic gates and timers on 9V/12V industrial bus lines where adding a 5V LDO is undesirable. The PIC16HV540's on-chip shunt regulator accepts 9V or 12V inputs without external regulation, while the 8-bit core and 25-byte RAM handle sequencer-style logic-replacement tasks. With 12 bidirectional I/O pins sourcing 25 mA each, it can drive relays and opto-isolators directly. The 200ns instruction cycle at 20MHz lets one MCU replace a board full of 74HC logic, while the 768B OTP keeps per-unit cost at the cents level typical of logic-replacement designs.
Рекомендуется
Automotive Interior Lighting and HVAC Actuator
Pre-CAN automotive nodes that must run directly from a 12V body electrical bus without an external regulator. The PIC16HV540-20I/SO's shunt regulator drops 12V down internally, while the 12-bit instruction set and 768B OTP hold fixed lighting patterns or actuator PWM sequences. Industrial temp grade covers most cabin environments, and the 200ns cycle supports 8-bit PWM at audible-silent frequencies. The 25 mA per-pin drive eliminates driver transistors for small LEDs and small relays, keeping the BOM to one IC plus passives.
Рекомендуется
Battery Charger Controller for SLA Cells
Dedicated sealed-lead-acid (SLA) charger MCU that monitors battery voltage and switches a charger FET through one I/O pin. The PIC16HV540's integrated high-voltage shunt regulator lets it share the 13.8V float rail directly with the battery, while the 8-bit ADC-free architecture relies on the comparator input and timer for voltage-period measurements. The 25-byte RAM is sufficient for state-machine charge control, and the OTP memory locks the charge profile at production time. Industrial temperature grade is appropriate for non-engine automotive and standby-power applications.
Рекомендуется
Capacitive Touch Front Panel Controller
Small front-panel MCU that scans a matrix of capacitive-touch buttons and drives indicator LEDs, replacing a dedicated capacitive-touch ASIC. The PIC16HV540's 12 I/O pins handle 8-12 touch channels directly, while the 200ns instruction cycle supports software-based touch measurement via RC time constant. The OTP memory stores the touch-threshold calibration permanently, eliminating field drift. The integrated shunt regulator on the SOIC-18 variant accepts the 9-12V backlight supply rail without an external LDO.
Рекомендуется
Sensor Signal Conditioning Front End
Dedicated MCU that interfaces analog sensors (NTC thermistors, Hall-effect switches, simple photodiodes) and presents a digital output to a host processor. The PIC16HV540-20I/SO's 25-byte RAM and 200ns cycle enable fixed-cycle sampling of one sensor channel and threshold comparison without host CPU load. The on-chip shunt regulator accepts industrial 24V (via external dropping resistor to VDD pin) or direct 12V operation. OTP memory locks calibration coefficients permanently for measurement repeatability across production runs.
Рекомендуется
White Goods Appliance Controller
Dedicated MCU in washing machines, dishwashers, and microwave ovens that drives user-interface buttons, LED indicators, and small relays. The PIC16HV540's 12 I/O pins and 25 mA source/sink handle panel LEDs directly. The OTP memory locks the appliance program permanently, preventing field firmware tampering. The integrated high-voltage shunt regulator eliminates the 5V LDO normally required for a 12V appliance bus, simplifying the BOM. Industrial temp grade covers kitchen and laundry environments, and 768B OTP fits the typical sequencer-style appliance program.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для PIC16HV540-20I/SO — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | PIC16HV540-04I/SO | PIC16HV540T-20I/SO | PIC16HV540-20I/P |
|---|---|---|---|---|
| Package | SOIC-18 (SO) | SOIC-18 (SO) - same | SOIC-18 (SO) - same | PDIP-18 (P) - through-hole |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 768 B (512 x 12) OTP | 768 B (512 x 12) OTP - same | 768 B (512 x 12) OTP - same | 768 B (512 x 12) OTP - same |
| Maximum Clock Speed | 20 MHz (200 ns instruction cycle) | 4 MHz (1 us instruction cycle) | 20 MHz (200 ns instruction cycle) - same | 20 MHz (200 ns instruction cycle) - same |
| RAM | 25 B | 25 B - same | 25 B - same | 25 B - same |
| I/O Pins | 12 bidirectional | 12 bidirectional - same | 12 bidirectional - same | 12 bidirectional - same |
| On-chip Shunt Regulator | Yes (5V/9V/12V) | Yes (5V/9V/12V) - same | Yes (5V/9V/12V) - same | Yes (5V/9V/12V) - same |
| Memory Type | OTP EPROM | OTP EPROM - same | OTP EPROM - same | OTP EPROM - same |
| Temperature Grade | Industrial -40C to +85C | Industrial -40C to +85C - same | Industrial -40C to +85C - same | Industrial -40C to +85C - same |
Ключевые отличия
- Integrated high-voltage shunt regulator eliminates external 5V LDO (против PIC16C54-20I/SO)
- OTP cost-optimized for high-volume logic replacement (против PIC16F84A-04/SO (flash MCU))
- Single-cycle 12-bit instruction set delivers high code density (против PIC16F1936T-I/SO (14 KB flash, 36 I/O))
Заметки по проектированию
Estimated: At VIN = 12V, VDD internal = 5V, and ILOAD = 50 mA, the on-chip shunt regulator dissipates (12V - 5V) * 0.050 A = 0.35 W. The SOIC-18 package has theta_JA of approximately 80-100 C/W, so junction temperature rises 28-35 C above ambient. At VIN = 12V and full 200 mA I/O sink budget the dissipation rises to (12-5)*0.2 = 1.4 W and junction rise can exceed 100 C - derate VDD voltage or distribute I/O load across multiple pins to stay within thermal limits. Always check Microchip's PIC16HV540 datasheet thermal derating curve for production layouts.
Place a 0.1 uF decoupling capacitor as close as possible to the VDD pin (pin 14) and a bulk 1-10 uF electrolytic or tantalum on the same node. The on-chip shunt regulator needs local charge reservoir to handle transient I/O switching. For RC oscillator mode, keep the RC network within 0.5 inch of pins 15-16 (OSC1/OSC2); stray capacitance will skew the calibration of the WDT prescaler. Avoid running digital signal traces directly under the IC to minimize coupling into the high-impedance analog VDD shunt path.
Do not assume the PIC16HV540 is flash-programmable - it is OTP and must be programmed at production time using a 13V VPP pulse on the MCLR pin per Microchip's programming specification. Failing to provide proper VPP rise time will result in unreliable OTP writes. Also note that the WDT prescaler is shared with Timer0; enabling WDT will reduce the Timer0 range. Finally, the RA0-RA3 pins are not 5V-tolerant above VDD on most PIC16C5x variants - check datasheet absolute maximum ratings before connecting inputs from higher-voltage rails.
Информация о соответствии
RoHS compliant per Microchip product page and DigiKey listing. SOIC-18 /SO suffix denotes lead-free matte-tin plating. Industrial temp grade only - not AEC-Q100 qualified; for AEC-Q100 automotive applications choose a PIC16F1xxx variant.