PIC16HV540-04/SO - 4MHz 8-Bit OTP MCU w/ Voltage Regulator | Microchip
MPN: PIC16HV540-04/SO ✓ Hoạt độngPIC16HV540-04/SO Tóm tắt
An 8-bit microcontroller (MCU) is a programmable logic device that integrates a CPU, memory (ROM/RAM), and I/O peripherals on a single silicon die; PIC microcontrollers use a Harvard RISC architecture that separates program and data memory buses. The PIC16HV540 specifically belongs to the enhanced PIC16C54 family - the smallest, lowest-cost PIC line intended for high-volume embedded control. Its on-chip shunt regulator allows direct operation from an unregulated DC source (typical industrial 5V, 9V, or 12V rails) without an external 7805-style LDO, simplifying BOM in cost-sensitive designs.
Key features include 12 digital I/O pins, a programmable watchdog timer, an 8-bit timer/counter, internal RC oscillator, power-on reset, brown-out detection support, and an operating voltage range of 3.5V to 15V enabled by the integrated voltage regulator. The HV (high-voltage) suffix denotes the on-chip regulator, which is the key differentiator from the non-HV PIC16C540. The 18-pin SOIC provides a compact surface-mount footprint for moderate-density designs.
Architecturally, the device uses a 12-bit instruction word with single-cycle execution except for branch instructions (2 cycles). The OTP program memory is one-time programmable - suitable for production but not for prototyping iteration. The integrated voltage regulator supports both 5V and 9V/12V system rails with minimal external components.
Typical applications include appliance control, sensor signal conditioning, battery chargers, smart lighting, automotive accessories, and any cost-driven embedded product requiring 8-bit processing with a wide Vin tolerance. The wide voltage range (3.5V to 15V) makes it suitable for industrial 12V systems, automotive 12V buses, and unregulated AC-derived DC rails.
When designing with this part, note that OTP precludes firmware updates; for prototyping use a windowed (JW) or Flash-based alternative. The on-chip voltage regulator requires an external shunt resistor and bulk capacitance sized per the datasheet regulator topology section.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC16HV540-04/SO — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC16HV540-04/SO (cùng hình factor và footprint) — khác nhau ở Core Architecture, I/O Pins, Data EEPROM, On-Chip Voltage Regulator, Operating Temperature.
PIC16HV540T-04/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16HV540-04I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C540-04/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16HV540-04/SO Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC16C (8-bit RISC, Harvard) |
| Clock Speed (Maximum) | 4 MHz |
| Instruction Execution Time | 200 ns (single cycle) |
| Program Memory | 768 B (512 x 12) OTP |
| RAM | 25 B |
| Data EEPROM | Not present (OTP-only architecture) |
| I/O Pins | 12 digital I/O |
| Supply Voltage (VDD) | 3.5 V to 15 V (via on-chip shunt regulator) |
| On-Chip Voltage Regulator | Yes (shunt type, distinguishes HV variant) |
| Timers | 1 x 8-bit Timer/Counter |
| Watchdog Timer | Yes (programmable WDT) |
| Oscillator | Internal RC + external crystal/RC options |
| Instruction Set Size | 33 single-word instructions |
| Instruction Width | 12 bits |
| Hộp | 18-pin SOIC (SO) |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40C to +85C (industrial; per PIC16HV540-04/SO suffix) |
| Trạng thái RoHS | Compliant (SOIC package suffix /SO indicates lead-free) |
| AEC-Q100 Automotive | Not qualified |
Cấu hình chân PIC16HV540-04/SO
| Chân 1 | RA2 — Digital I/O port A bit 2 |
| Chân 2 | RA3 — Digital I/O port A bit 3 |
| Chân 3 | RTCC — Timer/counter clock input (also digital I/O) |
| Chân 4 | /MCLR — Master clear (reset) input, active low |
| Chân 5 | VSS — Ground reference |
| Chân 6 | RB0 — Digital I/O port B bit 0 |
| Chân 7 | RB1 — Digital I/O port B bit 1 |
| Chân 8 | RB2 — Digital I/O port B bit 2 |
| Chân 9 | RB3 — Digital I/O port B bit 3 |
| Chân 10 | RB4 — Digital I/O port B bit 4 |
| Chân 11 | RB5 — Digital I/O port B bit 5 |
| Chân 12 | RB6 — Digital I/O port B bit 6 |
| Chân 13 | RB7 — Digital I/O port B bit 7 |
| Chân 14 | VSS — Ground (HV regulator return) |
| Chân 15 | OSC1 — Oscillator input / external clock |
| Chân 16 | OSC2 — Oscillator output |
| Chân 17 | RA0 — Digital I/O port A bit 0 |
| Chân 18 | RA1 — Digital I/O port A bit 1 |
Ứng dụng tiêu biểu
PIC16HV540-04/SO phù hợp cho 7 Áp dụngs: Appliance Control Boards, Automotive 12V Accessories, Battery Chargers, Smart Lighting Controls, Industrial Sensor Signal Conditioning, Toys and Consumer Electronics, HVAC Thermostats and Fan Controllers.
Appliance Control Boards
The PIC16HV540-04/SO's 3.5V-15V wide input range via on-chip shunt regulator makes it ideal for direct connection to rectified mains-derived DC rails in washing machines, microwave ovens, and dishwashers. The 12 I/O pins drive relays, triac triggers, and LED indicators without external level shifting. Its 4 MHz speed handles typical appliance state machines and timing loops; the 33-instruction RISC core simplifies coding for production. Note OTP memory locks the firmware at programming time.
Được đề xuất
Automotive 12V Accessories
The PIC16HV540-04/SO accepts the automotive 12V bus (nominally 13.8V) directly via its on-chip shunt regulator, eliminating an external 7805 LDO. The 18-pin SOIC and -40C to +85C industrial range cover cabin and trunk environments; the watchdog timer and brown-out reset provide robustness against cranking transients. For under-hood or AEC-Q100-qualified designs, however, an AEC-Q100 part is required - the standard PIC16HV540-04/SO is NOT AEC-Q100 qualified.
Được đề xuất
Battery Chargers
The PIC16HV540-04/SO suits low-cost NiCd/NiMH/Li-ion charger controllers where its on-chip 3.5V-15V tolerance connects directly to wall-adapter-derived DC without an external regulator. The 8-bit timer drives PWM charge profiles and termination timers; 12 I/O pins connect to current-sense, voltage-divider feedback, status LEDs, and charge-enable FET gates. The wide Vin range accommodates both 5V USB-derived and 12V adapter sources with one design.
Được đề xuất
Smart Lighting Controls
The PIC16HV540-04/SO operates directly from AC-derived DC rails (typically 12V or 24V) in LED driver and dimmer circuits, using its on-chip regulator to eliminate external LDOs. The 33-instruction core implements 0-10V dimming, DALI-lite protocols, or simple PWM dimming. Twelve I/O pins accommodate multiple LED channels, button inputs, and 0-10V analog dimming via the firmware-controlled timing. OTP memory suits fixed-feature production runs.
Được đề xuất
Industrial Sensor Signal Conditioning
The PIC16HV540-04/SO operates directly from industrial 24V rails (rectified to ~30V) via its 15V-tolerant shunt regulator with appropriate external resistor sizing, making it ideal for proximity sensors, photoelectric switches, and limit-switch interfaces. The on-chip timer precisely debounces mechanical inputs and triggers digital outputs. Twelve I/O pins handle two or three sensor channels with status indicators. Industrial -40C to +85C operation covers factory-floor environments.
Được đề xuất
Toys and Consumer Electronics
The PIC16HV540-04/SO targets cost-sensitive consumer products like electronic toys, remote controls, simple games, and educational devices. The 33-instruction RISC core is easy to learn for entry-level developers; the integrated voltage regulator reduces BOM cost by eliminating an external LDO. OTP memory at $2-3 unit cost (1000-piece) suits high-volume production. Twelve I/O pins drive LEDs, sound piezos, buttons, and motor drivers. Wide Vin tolerates battery and wall-adapter sources.
Được đề xuất
HVAC Thermostats and Fan Controllers
The PIC16HV540-04/SO's wide 3.5V-15V Vin tolerance suits HVAC 24VAC-derived DC rails and 12V fan supplies. The 8-bit timer implements PWM fan-speed control and thermostat hysteresis loops. Twelve I/O pins accommodate temperature-sensor inputs (via firmware timing-based ADC), relay outputs for compressor/fan switching, and triac triggers. Industrial -40C to +85C range covers unconditioned equipment rooms. The on-chip regulator eliminates a separate 5V LDO stage.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16HV540-04/SO — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC16HV540T-04/SO | PIC16HV540-04I/SO | PIC16C540-04/SO |
|---|---|---|---|---|
| Package | 18-pin SOIC (SO) | 18-pin SOIC (SO) - same | 18-pin SOIC (SO) - same | 18-pin SOIC (SO) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Clock Speed (max) | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Program Memory | 768 B OTP | 768 B OTP | 768 B OTP | 768 B OTP |
| On-Chip HV Regulator | Yes (3.5V-15V) | Yes (3.5V-15V) | Yes (3.5V-15V) | No (external regulator required, 2.5V-6.0V) |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C (industrial grade marked) | -40C to +85C |
| I/O Pins | 12 | 12 | 12 | 12 |
| Memory Type | OTP (one-time programmable) | OTP | OTP | OTP |
| RoHS Compliance | Compliant (SO suffix) | Compliant | Compliant | Compliant |
Bảo phân biệt quan trọng
- Integrated on-chip 3.5V-15V shunt voltage regulator eliminates external LDO (vsPIC16C540-04/SO)
- Industrial temperature grade -40C to +85C guaranteed (vsPIC16HV540T-04/SO)
- Surface-mount SOIC package for high-density designs (vsPIC16HV540/JW)
Ghi chú thiết kế
The PIC16HV540-04/SO on-chip shunt regulator requires an external shunt resistor between the unregulated supply (3.5V-15V) and the VDD pin. Per the datasheet regulator section, the resistor value must be calculated based on the maximum supply voltage and the device's quiescent current plus I/O sink/source current. Estimated: for a 12V supply and 25 mA total device load, a 200-300 ohm shunt resistor (1W rated) is typical. A bulk decoupling capacitor of at least 10 uF and a 100 nF ceramic at VDD are required for regulator stability.
OTP (One-Time Programmable) memory cannot be erased or rewritten after programming. Verify firmware with a windowed PIC16HV540/JW prototype before committing to OTP production parts. Also note: the PIC16HV540-04/SO is NOT AEC-Q100 qualified - for automotive applications requiring AEC-Q100, choose a different family. Brown-out reset must be enabled in the configuration word to avoid undefined behavior on slow-rising power rails.
Keep the shunt regulator resistor and VDD bypass capacitors within 5 mm of the VDD/VSS pins on the 18-pin SOIC layout. The oscillator crystal or resonator should be placed adjacent to OSC1/OSC2 with short traces to minimize EMI. The /MCLR pin requires a 10 kohm pull-up to VDD; a 100 nF capacitor to VSS on /MCLR improves noise immunity. Avoid routing high-current switching traces (relay/triac drivers) parallel to the oscillator traces to prevent injection of switching noise into the clock.
Estimated: at maximum 15V supply, 5V regulated VDD, and 25 mA load current, the on-chip shunt regulator dissipates approximately (15V-5V) * 25mA = 250 mW continuously. The 18-pin SOIC thermal resistance is approximately 75 C/W (typical), resulting in a 19C junction rise above ambient - well within the -40C to +85C operating range. At higher supply voltages (e.g., rectified 24VAC rails at 30V+), reduce load current or add a pre-regulator to keep dissipation below 500 mW.
Thông tin tuân thủ
SO suffix indicates lead-free SOIC package. Microchip parts are RoHS/REACH compliant per Microchip product page. Not AEC-Q100 qualified - use non-automotive applications only.