PIC16HV540-20/SO - 8-Bit 20MHz OTP MCU 768B | Microchip
N.º de pieza: PIC16HV540-20/SO ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $3.42 | $3,42 |
| 10 | $3.05 | $30,50 |
| 100 | $2.69 | $269,00 |
| 500 | $2.35 | $1.175,00 |
| 1.000 | $2.08 | $2.080,00 |
PIC16HV540-20/SO Descripción general
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.
Alternativas directas para PIC16HV540-20/SO — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con PIC16HV540-20/SO (mismo factor de forma y huella) — difiere en Package, Core Architecture, On-chip Voltage Regulator, Operating Temperature, Program Memory Size.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
PIC16HV540-04I/SO
✅ Sustitución directa✓ En stock
$1.78 / unidad
Ver hoja de datos →PIC16HV540-04I/P
✅ Sustitución directa✓ En stock
$1.85 / unidad
Ver hoja de datos →PIC16HV540/JW
✅ Sustitución directa✓ En stock
$6.9 / unidad
Ver hoja de datos →PIC16HV540-20/SO Valores máximos y características eléctricas
| Core Architecture | 8-bit Enhanced PIC16C5x |
| Program Memory | 768B (512 x 12) OTP |
| RAM | 25 bytes |
| I/O Pins | 12 |
| Frecuencia de reloj máxima | 20 MHz |
| Instruction Execution Time | 200 ns @ 20 MHz |
| Instruction Set Size | 33 single-word instructions |
| Supply Voltage Range | 3.5 V to 15 V |
| On-Chip Voltage Regulator | Shunt type (HV series) |
| ROM Type | OTP (One-Time Programmable) |
| Encapsulado | 18-SOIC (0.295", 7.50 mm width) |
| Tipo de montaje | Surface Mount |
| Temperatura de funcionamiento | 0C to +70C (commercial; -20C variants available) |
| Watchdog Timer | Yes |
| Power-On Reset | Yes |
| Nivel MSL | 1 (unlimited floor life at <30C / 85% RH) |
Configuración de pines de PIC16HV540-20/SO
| Pin 1 | RA2 — Bidirectional I/O pin; also analog/clock input |
| Pin 2 | RA3 — Bidirectional I/O pin; also T0CKI timer0 clock input |
| Pin 3 | RA4 — Bidirectional I/O pin; open-drain option |
| Pin 4 | MCLR/VPP — Master clear reset (active low) / programming voltage input |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0 — Bidirectional I/O pin; external interrupt input |
| Pin 7 | RB1 — Bidirectional I/O pin |
| Pin 8 | RB2 — Bidirectional I/O pin |
| Pin 9 | RB3 — Bidirectional I/O pin |
| Pin 10 | RB4 — Bidirectional I/O pin |
| Pin 11 | RB5 — Bidirectional I/O pin |
| Pin 12 | RB6 — Bidirectional I/O pin |
| Pin 13 | RB7 — Bidirectional I/O pin |
| Pin 14 | VDD — Positive supply (regulated internally from VIN) |
| Pin 15 | OSC2 — Oscillator output / CLKOUT |
| Pin 16 | OSC1 — Oscillator input / CLKIN |
| Pin 17 | RA0 — Bidirectional I/O pin |
| Pin 18 | RA1 — Bidirectional I/O pin |
Aplicaciones típicas
PIC16HV540-20/SO es adecuado para 6 aplicacións: 12V-Bus Appliance Controller, Automotive Body Electronics, Security Keypad Controller, Lighting Ballast Controller, Industrial Timer / Sequencer, Battery Charger State Machine.
12V-Bus Appliance Controller
The PIC16HV540-20/SO is ideal for 12V-bus appliance controllers because its on-chip 3.5-15V shunt regulator eliminates the external 5V LDO that most 8-bit MCUs require. At 12V supply and 5V/20MHz operation, the device runs directly from the unregulated appliance rail, driving relays, triac optos, and indicator LEDs through its 12 I/O pins. The 200ns instruction execution enables precise zero-cross triac timing for heater and motor control. Compared with a discrete regulator + MCU design, the PIC16HV540 saves roughly $0.20 in BOM and 50 mm² of PCB area.
Recomendado
Automotive Body Electronics
In automotive body modules running on a 12V battery rail, the PIC16HV540-20/SO operates directly from the nominal 13.8V supply with the on-chip shunt regulator absorbing line transients up to 15V. The 12 I/O pins can scan a 3x4 key matrix for door-lock and window controls, drive LED indicators, and read switch inputs with internal weak pull-ups. The 33-instruction RISC set keeps firmware ROM below 768 bytes for typical body-controller tasks. Automotive designs requiring AEC-Q100 must use a Q-graded variant; this commercial-grade part suits non-safety accessory modules.
Recomendado
Security Keypad Controller
The PIC16HV540-20/SO suits keypad and RFID entry controllers because its 12 I/O scan a 3x4 matrix directly without external drivers, and its 200ns instruction cycle debounces keys in firmware with no extra components. The 25B RAM holds a 4-6 digit PIN buffer and scratch state; 768B OTP stores the verification logic. The wide 3.5-15V supply allows the same PCB to accept 5V logic, 9V battery, or 12V bus power without changing the regulator circuit. For battery-powered locks, calculate quiescent dissipation because the shunt regulator draws continuous bias current.
Recomendado
Lighting Ballast Controller
Fluorescent and HID ballast control loops benefit from the PIC16HV540-20/SO's 20MHz speed, which provides 200ns timing resolution for PFC switching, filament preheat, and lamp-current regulation. The 12 I/O handle gate-drive, current-sense comparator input, fault output, and dimming interface. Operating from 12V auxiliary rail, the on-chip shunt regulator simplifies the ballast power tree to a single-stage design. For LED retrofit ballasts, the OTP memory locks the firmware to prevent field tampering of dimming curves.
Recomendado
Industrial Timer / Sequencer
Industrial sequence timers and pump controllers use the PIC16HV540-20/SO because the on-chip HV regulator accepts 24V control-cabinet rails (with external pre-regulator) and the watchdog timer guards against firmware lockup. The 33-instruction RISC core delivers deterministic timing for sequential relay activation, and the 12 I/O drive multiple SPST outputs without a port expander. 768B OTP fits typical time-of-day, interval, and fault-handling routines. The part's commercial 0-70C temperature rating suits enclosed control cabinets.
Recomendado
Battery Charger State Machine
Lead-acid and NiMH charger controllers use the PIC16HV540-20/SO as a state-machine supervisor: the 12 I/O read battery voltage dividers, thermistor sensors, and charge-current shunt, then drive MOSFET gates or relay coils through optocouplers. The on-chip HV shunt regulator accepts 12-15V from the wall adapter without an external LDO. The 200ns instruction cycle executes the charge-state decision tree in real time. OTP memory locks the charging profile per battery chemistry, eliminating field firmware modification.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para PIC16HV540-20/SO — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | PIC16HV540-04I/SO | PIC16HV540-04I/P | PIC16HV540/JW |
|---|---|---|---|---|
| Package | 18-SOIC (7.50 mm width) | 18-SOIC (7.50 mm width) - same | 18-PDIP (DIP-18, through-hole) | 18-Ceramic DIP (windowed EPROM) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 768B (512 x 12) OTP | 768B (512 x 12) OTP - same | 768B (512 x 12) OTP - same | 768B (512 x 12) EPROM (windowed) |
| Maximum Clock Frequency | 20 MHz | 4 MHz (-80%) | 4 MHz (-80%) | 20 MHz - same |
| Operating Temperature | 0C to +70C (commercial) | -40C to +85C (industrial) | -40C to +85C (industrial) | 0C to +70C (commercial, dev) |
| Supply Voltage Range | 3.5 V to 15 V (HV shunt regulator) | 3.5 V to 15 V - same | 3.5 V to 15 V - same | 3.5 V to 15 V - same |
| I/O Pins | 12 | 12 - same | 12 - same | 12 - same |
| RAM | 25 bytes | 25 bytes - same | 25 bytes - same | 25 bytes - same |
Diferenciadores clave
- On-chip HV shunt regulator accepts 3.5-15V directly (frente a PIC16C54-20/SO (no HV regulator))
- Commercial 20MHz speed grade available in SOIC-18 (frente a PIC16HV540-04I/SO (industrial 4MHz))
- Same-footprint alternative in industrial temperature grade (frente a PIC16HV540-04I/SO)
Notas de diseño
The PIC16HV540-20/SO's internal shunt regulator draws bias current proportional to VIN. At 15V supply the regulator dissipates roughly (15V - 5V) * I_bias, so budget additional quiescent power dissipation that scales with VIN. For battery-powered designs, the PIC16LF variants or external switching pre-regulator are preferred. Add a 0.1uF ceramic bypass capacitor close to VDD (pin 14) and a 10uF bulk capacitor if the supply impedance is high.
Place the 18-SOIC land pattern on a single signal layer with a ground plane beneath for noise immunity. Keep crystal or resonator traces within 5 mm of OSC1/OSC2 to avoid stray pickup, and add a guard trace between OSC1 and adjacent switching lines. For in-circuit programming, route MCLR/VPP through a 10kohm pull-up to VDD and a diode to the programmer's VPP line, per Microchip's programming specification.
Do not assume the PIC16HV540-20/SO can be re-programmed - this is OTP memory, so a programming error is permanent and requires a new part. Verify firmware with a PIC16HV540/JW windowed EPROM sample before committing to OTP volume orders. Also note the Enhanced PIC16C5x core uses 12-bit instructions that are NOT binary compatible with mid-range PIC16F parts - porting firmware from PIC16F88 requires a full rewrite, not a recompile.
Información de cumplimiento
RoHS, REACH, lead-free and halogen-free statuses were not present in the verified web data and are marked unknown; AEC-Q100 is not qualified for this commercial-grade part. The Microchip product page should be consulted for the latest environmental compliance documentation.