PIC16HV540T-20I/SS - 8-Bit 20MHz OTP MCU w/ Voltage Regulator | Microchip
N.º de pieza: PIC16HV540T-20I/SS ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $2.41 | $2,41 |
| 10 | $2.17 | $21,70 |
| 100 | $1.93 | $193,00 |
| 500 | $1.69 | $845,00 |
| 1.000 | $1.45 | $1.450,00 |
PIC16HV540T-20I/SS Descripción general
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.
Alternativas directas para PIC16HV540T-20I/SS — 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 PIC16HV540T-20I/SS (mismo factor de forma y huella) — difiere en Core Architecture, Package, Watchdog Timer, Operating Temperature, Program Memory Size.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
PIC16HV540-20I/SS
✅ Sustitución directa✓ En stock
$1.45 / unidad
Ver hoja de datos →PIC16HV540T-20/SS
✅ Sustitución directa✓ En stock
$1.96 / unidad
Ver hoja de datos →PIC16HV540-04I/SO
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$1.78 / unidad
Ver hoja de datos →PIC16F15344T-I/SS
✅ Sustitución directa✓ En stock
$0.72 / unidad
Ver hoja de datos →PIC16F690T-I/SS
✅ Sustitución directa✓ En stock
$1.55 / unidad
Ver hoja de datos →PIC16HV540T-20I/SS Valores máximos y características eléctricas
| Core Architecture | Enhanced PIC16C54, 8-bit RISC |
| Instruction Set | 33 single-word instructions, 12-bit wide |
| Program Memory | 768 bytes (512 x 12) OTP |
| RAM | 25 x 8 bytes |
| I/O Pins | 12 |
| Frecuencia de reloj máxima | 20 MHz |
| Instruction Cycle Time | 200 ns |
| Supply Voltage Range | 3.5 V to 15 V |
| On-Chip Voltage Regulator | Integrated shunt regulator |
| ROM Type | OTP (One-Time Programmable) EPROM |
| Watchdog Timer | Yes, with on-chip RC oscillator |
| Power-On Reset | Yes |
| Code Protection | Yes |
| Rango de temperatura de funcionamiento | -40 C to +85 C (Industrial) |
| Encapsulado | 20-pin SSOP |
| Tipo de montaje | Surface Mount |
Configuración de pines de PIC16HV540T-20I/SS
| Pin 1 | RA2 — Bidirectional I/O port A bit 2 |
| Pin 2 | RA3 — Bidirectional I/O port A bit 3 |
| Pin 3 | RTCC — Real-Time Clock/Counter input |
| Pin 4 | MCLR/VPP — Master Clear (reset) / Programming voltage input |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0 — Bidirectional I/O port B bit 0 |
| Pin 7 | RB1 — Bidirectional I/O port B bit 1 |
| Pin 8 | RB2 — Bidirectional I/O port B bit 2 |
| Pin 9 | RB3 — Bidirectional I/O port B bit 3 |
| Pin 10 | RB4 — Bidirectional I/O port B bit 4 |
| Pin 11 | RB5 — Bidirectional I/O port B bit 5 |
| Pin 12 | RB6 — Bidirectional I/O port B bit 6 |
| Pin 13 | RB7 — Bidirectional I/O port B bit 7 |
| Pin 14 | VREG — Internal shunt voltage regulator terminal |
| Pin 15 | VDD — Positive supply (regulated 5V internal) |
| Pin 16 | OSC2 — Oscillator output |
| Pin 17 | OSC1 — Oscillator input / external clock |
| Pin 18 | RA0 — Bidirectional I/O port A bit 0 |
| Pin 19 | RA1 — Bidirectional I/O port A bit 1 |
| Pin 20 | VSS — Ground reference (secondary) |
Aplicaciones típicas
PIC16HV540T-20I/SS es adecuado para 7 aplicacións: White-Good Appliance Control, Battery Charger Controllers, LED Lighting Drivers, Remote Controls and IR Nodes, Smart Meter Edge Nodes, Automotive Body Controllers (Non-Safety), Industrial Sensor Signal Conditioning.
White-Good Appliance Control
The PIC16HV540T-20I/SS is well suited to washing machine, dishwasher, and microwave oven controllers where a single 12 V or rectified-mains rail must power the MCU directly without an external LDO. Its on-chip shunt regulator accepts 3.5 V to 15 V, the 12 I/O pins each sink 25 mA for direct relay or triac drive, and 768B OTP plus 25B RAM fit typical user-interface, sensor-read, and timer-state code. The 200 ns instruction cycle and 33-instruction RISC core keep motor-control loops deterministic. Place input filtering on the shunt-regulator terminal and use MOV protection across the supply rail.
Recomendado
Battery Charger Controllers
Wide-input 3.5 V to 15 V supply tolerance makes the PIC16HV540T-20I/SS ideal for lead-acid and NiMH charger boards fed from 6 V / 12 V adapters or solar panels. The shunt regulator absorbs supply transients, while 12 I/O and a 200 ns cycle support ADC-free voltage and current loops using comparator peripherals. 768B OTP stores charge profiles (CC/CV, termination, float) for 1-3 cell chemistries. Add an external MOSFET for high-current switching and use the Watchdog Timer with on-chip RC oscillator for latched fault recovery.
Recomendado
LED Lighting Drivers
In commercial LED drivers and signage controllers, the PIC16HV540T-20I/SS executes PWM dimming and color-mixing logic at 20 MHz with deterministic 200 ns loop time. The on-chip shunt regulator lets the part share the LED string's 12 V or 24 V rail directly, eliminating a separate MCU supply. 12 I/O drive multiple MOSFET gates or constant-current driver enable lines, and 768B OTP holds dimming curves, fade tables, and DMX-512 frame decoders. Industrial -40 to +85 C temperature grade supports outdoor fixture deployments.
Recomendado
Remote Controls and IR Nodes
The PIC16HV540T-20I/SS powers low-cost 38 kHz IR remote handsets and ceiling-fan controllers where battery life and BOM cost dominate. Its 12 I/O drive IR LEDs directly through a single transistor, scan 4x4 key matrices without external logic, and the Enhanced PIC16C54 core fits NEC/RC5/RC6 protocols into 768B OTP with room to spare. The internal shunt regulator lets the design accept 3 V to 12 V battery packs without an LDO. Use the Watchdog Timer with on-chip RC oscillator to recover from brown-out conditions on weak cells.
Recomendado
Smart Meter Edge Nodes
Utility sub-meter and energy-monitoring edge nodes benefit from the PIC16HV540T-20I/SS's 3.5 V to 15 V shunt-regulated supply, allowing direct connection to 12 V sealed lead-acid backup rails. The 200 ns cycle and 12-bit instruction width compress pulse-counting and tamper-detection code into 768B OTP, with 25B RAM holding the rolling kWh registers. The integrated Watchdog Timer with on-chip RC oscillator catches firmware lock-ups during long field deployments. Industrial -40 to +85 C operation suits outdoor meter enclosures.
Recomendado
Automotive Body Controllers (Non-Safety)
For non-safety body-electronics modules - seat controllers, mirror adjusters, accessory lighting - the PIC16HV540T-20I/SS operates directly from a regulated 12 V body rail through its shunt regulator, eliminating a point-of-load LDO. The 12 I/O drive small motors and LEDs, the Watchdog Timer adds fault recovery, and 768B OTP holds calibration tables for trim-position memory. Note: this part is not AEC-Q100 qualified and should not be used in safety-critical systems; pair with external ESD protection on bus pins per automotive EMC requirements.
Recomendado
Industrial Sensor Signal Conditioning
The PIC16HV540T-20I/SS conditions and linearizes analog signals from 4-20 mA loops, thermocouples, or thermistors in factory-floor sensor modules. Its on-chip shunt regulator accepts 24 V loop voltage directly, reducing the BOM by an external LDO. The 200 ns instruction cycle executes lookup-table-based linearization and digital filtering in real time, while 12 I/O interface to HART modems or simple LED bar-graph displays. Industrial -40 to +85 C operation handles cabinet environments, and 768B OTP stores calibration constants for the sensor family.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para PIC16HV540T-20I/SS — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | PIC16HV540-20I/SS | PIC16HV540T-20/SS | PIC16HV540-04I/SO | PIC16F15344T-I/SS | PIC16F690T-I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin SSOP | 20-pin SSOP - same | 20-pin SSOP - same | 20-pin SOIC - different land pattern | 20-pin SSOP - same | 20-pin SSOP - same |
| Program Memory | 768B OTP | 768B OTP | 768B OTP | 768B OTP | 7KB Flash | 7KB Flash |
| Maximum Clock | 20 MHz | 20 MHz | 20 MHz | 4 MHz | 32 MHz | 20 MHz |
| RAM | 25 bytes | 25 bytes | 25 bytes | 25 bytes | 512 bytes | 256 bytes |
| I/O Pins | 12 | 12 | 12 | 12 | 18 | 18 |
| Supply Voltage | 3.5 V to 15 V (shunt regulated) | 3.5 V to 15 V (shunt regulated) | 3.5 V to 15 V (shunt regulated) | 3.5 V to 15 V (shunt regulated) | 2.3 V to 5.5 V (external LDO required) | 2.0 V to 5.5 V (external LDO required) |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C | 0 C to +70 C (Commercial) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| On-Chip Voltage Regulator | Yes (shunt, 3.5-15V input) | Yes | Yes | Yes | No | No |
Diferenciadores clave
- Integrated on-chip shunt voltage regulator (frente a PIC16F690T-I/SS)
- True 20 MHz throughput with 200 ns instruction cycle (frente a PIC16HV540-04I/SO)
- Industrial -40 to +85 C temperature grade as standard (frente a PIC16HV540T-20/SS)
Notas de diseño
The on-chip shunt regulator is a linear dissipative element: at VIN=15V, VDD=5V and 5mA logic current the regulator drops 10V x 5mA = 50mW. At higher load currents (e.g. driving LEDs through I/O pins) total dissipation rises quickly. Estimated: at 12 I/O each sourcing 10mA from VDD, the shunt dissipates 10V x (5mA + 120mA) = 1.25W, requiring thermal relief on the SSOP-20 land pattern. Place a 0.1uF decoupling capacitor within 5mm of VDD (pin 15).
The SSOP-20 thermal pad is the die-attach paddle exposed through the package bottom. Solder it to a copper pour of at least 100 mm^2 to keep junction temperature under 100 C at the worst-case shunt dissipation. Route OSC1/OSC2 traces (pins 17, 16) as short as possible and keep them away from RB0-RB7 switching lines to avoid coupling into the crystal. Place the MCLR/VPP pull-up (typically 10 kohm) close to pin 4 to ensure clean reset behaviour.
OTP parts cannot be re-programmed - do not order PIC16HV540T-20I/SS for prototypes; use the JW windowed CERDIP (PIC16HV540/JW) or a Flash-based PIC16F15344T-I/SS sibling instead. The 'I' suffix means industrial -40 to +85 C; using a commercial 0-70 C grade (PIC16HV540T-20/SS) outside its range may cause oscillator drift or POR malfunction. Always configure the Watchdog Timer with on-chip RC oscillator in firmware before enabling, as it cannot be disabled once started.
Route the VREG pin (pin 14) directly to the external series resistor that feeds the shunt regulator; keep this trace short and wide (>=0.5mm) to minimize resistance that would skew the internal 5V reference. Decouple VDD (pin 15) with both a 10uF tantalum and a 0.1uF ceramic in parallel, placed within 3mm of the pin. The shunt-regulator thermal performance depends on the VREG pin copper area - add a via array under the pad to the opposite PCB plane.
Información de cumplimiento
RoHS / lead-free status not explicitly stated in verified web data; Microchip's general policy lists most SSOP-packaged PIC MCUs as RoHS compliant but lot-specific certificate should be requested. Part is not AEC-Q100 qualified - do not use in automotive safety systems.
