PIC16HV540-20I/SS - 20MHz 8-Bit MCU 768B OTP 20-SSOP | Microchip
Teilenummer: PIC16HV540-20I/SS ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $2.45 | $2,45 |
| 10 | $2.18 | $21,80 |
| 100 | $1.85 | $185,00 |
| 500 | $1.62 | $810,00 |
| 1.000 | $1.45 | $1.450,00 |
PIC16HV540-20I/SS Übersicht
An 8-bit OTP microcontroller is a single-chip computer built around an 8-bit data path and one-time-programmable non-volatile memory that retains code without power. In the broader taxonomy, OTP microcontrollers sit beneath flash-based MCUs (re-programmable) and above mask-ROM MCUs (factory-programmed only); all three belong to the embedded controller sub-class of microcontrollers, which themselves are integrated circuits under the semiconductor umbrella. PIC16C/PIC16HV devices target cost-sensitive, deterministic control applications where code protection, ultra-low sleep current, and a small footprint matter more than large memory or high clock speed.
Key features of the PIC16HV540-20I/SS include a 12-bit instruction word with 33 single-word/35 single-cycle instructions, an 8-bit real-time timer/counter with 8-bit programmable prescaler, watchdog timer with on-chip RC oscillator, internal power-on reset, internal MCLR pull-up, code protection, power-saving SLEEP mode, selectable oscillator options (RC, XT, LP, HS), and an operating voltage range of approximately 3.5 V to 15 V delivered through the integrated HV shunt regulator from a higher external VPP.
The architecture is a RISC Harvard design with separate program and data buses; the ALU is 8-bit and most instructions execute in a single instruction cycle except for program branches which take two cycles. The on-chip HV regulator eliminates the need for an external 7805-style regulator in many battery or high-voltage-bus designs, simplifying the BOM.
Typical applications include low-cost battery-powered appliances, smoke detectors and CO sensors, electronic meters and utility metering front-ends, simple motor/relay drivers, automotive body controllers, and white-goods control boards. The device is well-suited wherever a small pin count, deterministic timing, and a wide unregulated supply range are priorities.
When designing with the PIC16HV540-20I/SS, remember OTP memory cannot be re-programmed in-circuit - prototypes should be built with windowed (JW) or flash variants before committing. The integrated HV regulator dissipates excess voltage as heat, so thermal management of the shunt resistor and decoupling placement are important at high VPP voltages.
This page synthesizes distributor pricing, same-package drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in-Alternativen für PIC16HV540-20I/SS – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit PIC16HV540-20I/SS (gleiche Bauform und Footprint) – abweichend in Package, Core Architecture, Watchdog Timer, Operating Temperature, Program Memory Size.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
PIC16HV540-20/SS
✅ Drop-In✓ Auf Lager
$1.8 / Stück
Datenblatt ansehen →PIC16HV540-04I/SS
✅ Drop-In✓ Auf Lager
$1.05 / Stück
Datenblatt ansehen →PIC16HV540T-20I/SS
✅ Drop-In✓ Auf Lager
$1.45 / Stück
Datenblatt ansehen →PIC16HV540-20I/SO
✅ Drop-In✓ Auf Lager
$1.39 / Stück
Datenblatt ansehen →PIC16HV540-20I/P
✅ Drop-In✓ Auf Lager
$1.41 / Stück
Datenblatt ansehen →PIC16HV540/JW
✅ Drop-In✓ Auf Lager
$6.9 / Stück
Datenblatt ansehen →PIC16HV540-20I/SS Grenzwerte & elektrische Eigenschaften
| Product Type | 8-Bit OTP Microcontroller |
| Family | PIC16HV540 / PIC16C |
| Core Architecture | RISC Harvard, 8-bit data path, 12-bit instruction word |
| Maximale Taktfrequenz | 20 MHz |
| Instruction Execution Time | 200 ns (one instruction cycle per 4 clock periods) |
| Program Memory Type | OTP (One-Time Programmable) EPROM |
| Program Memory Size | 768 bytes (512 x 12 words) |
| Data RAM | 25 bytes |
| I/O Pins | 12 bidirectional |
| Timers | 1 x 8-bit timer/counter with 8-bit programmable prescaler |
| Watchdog Timer | Yes, with on-chip RC oscillator |
| Integrated Voltage Regulator | On-chip HV shunt regulator (derives VDD from VPP) |
| Oscillator Options | RC, XT, LP, HS (external) |
| Gehäuse | 20-pin SSOP (5.30 mm body) |
| Montageart | Surface Mount |
| Betriebstemperatur | -40 C to +85 C (Industrial, 'I' suffix) |
PIC16HV540-20I/SS Pin-Konfiguration
| 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 — Master clear (reset) 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 | VPP — High-voltage supply/programming voltage input (HV shunt regulator input) |
| Pin 15 | VDD — Regulated logic supply output (from internal HV shunt regulator) |
| Pin 16 | OSC2 — Oscillator output |
| Pin 17 | OSC1 — Oscillator input |
| Pin 18 | RA0 — Bidirectional I/O port A bit 0 |
| Pin 19 | RA1 — Bidirectional I/O port A bit 1 |
| Pin 20 | NC — Not connected (per package pinout) |
Typische Anwendungen
PIC16HV540-20I/SS ist geeignet für 7 Anwendungs: Smoke and CO Detectors, Battery-Powered Appliance Control, Electronic Utility Meters, Automotive Body Controllers, Simple Relay and Solenoid Drivers, White Goods and HVAC Control Boards, Low-Cost Toys and Educational Electronics.
Smoke and CO Detectors
The PIC16HV540-20I/SS is well-suited to battery-powered smoke and CO detectors because its integrated HV shunt regulator accepts a wide unregulated supply directly from a 9V battery or voltage divider on the mains line, eliminating the external LDO. The 200 ns instruction cycle and 8-bit timer/counter with prescaler handle ionization-chamber pulse counting and sounder-pattern timing deterministically. Its 12 I/O pins drive the piezo sounder, status LED, and low-battery test circuitry without external logic, and 768 bytes of OTP memory holds the alarm-pattern firmware and self-diagnostic routine at a unit cost around USD 1.45 in 1000-piece reels, making it ideal for high-volume disposable safety devices.
Empfohlen
Battery-Powered Appliance Control
Small home appliances - electric toothbrushes, kitchen timers, and personal-care devices - benefit from the PIC16HV540-20I/SS's combination of integrated HV regulation and ultra-low sleep current. The HV regulator tolerates a wide battery voltage swing as cells discharge, while SLEEP mode drops quiescent current to microamp levels between button presses. 200 ns instruction execution is more than enough for button debouncing, LED PWM, and motor burst control, and 768 bytes of OTP memory holds full application firmware including low-battery warning logic. The 20-pin SSOP footprint fits inside sealed handle enclosures where every square millimeter matters.
Empfohlen
Electronic Utility Meters
Water, gas, and electricity meters use the PIC16HV540-20I/SS for pulse counting, LCD segment drive, and tamper-detection logic. The 8-bit timer/counter with programmable 8-bit prescaler captures meter pulses across a wide dynamic range, and the deterministic 200 ns instruction cycle ensures accurate long-term accumulation. The HV regulator accepts unregulated bus voltage from current transformers or rectifier networks directly, eliminating auxiliary power circuitry. With 25 bytes of RAM sufficient for a rolling counter and CRC accumulator, and OTP memory locking the calibration constants and anti-tamper firmware against field modification, this part is a long-standing choice for sealed residential metering front-ends.
Empfohlen
Automotive Body Controllers
The PIC16HV540-20I/SS serves low-end automotive body controllers such as seat heaters, mirror adjusters, and simple lighting drivers where cost dominates over communication stack requirements. The integrated HV regulator handles 12V vehicle bus voltage directly, and the industrial -40 C to +85 C temperature rating covers most cabin and under-hood body-electronics environments. Its 12 I/O pins switch relays and read switches without external drivers for loads under 25 mA. While not AEC-Q100 qualified, this part remains widely used in non-safety body-control modules where the BOM cost and the OTP code-lock advantage outweigh the lack of formal automotive qualification.
Empfohlen
Simple Relay and Solenoid Drivers
Industrial relay and solenoid control boards use the PIC16HV540-20I/SS to sequence multiple outputs and provide deterministic on/off timing. The 12 I/O pins drive up to six relays or solenoids directly through external transistors, and the 8-bit timer/counter with prescaler generates precise debounce windows and PWM-like duty cycles. With 768 bytes of OTP, the device stores full sequencer logic and fault-recovery routines. The HV regulator accepts industrial 24V bus voltage (via a series resistor) and derives logic-level VDD internally, replacing the external regulator + protection diode stack that conventional MCUs would require.
Empfohlen
White Goods and HVAC Control Boards
Washing machines, dishwashers, and small HVAC controllers leverage the PIC16HV540-20I/SS for cost-optimized front-panel logic and motor-driver sequencing. The 12 I/O pins interface with mechanical switches, indicator LEDs, and triac trigger circuitry for AC load control. The HV regulator accepts mains-derived DC after a bridge rectifier, eliminating the auxiliary power supply typically required for digital logic. Its 200 ns instruction cycle provides deterministic timing for triac zero-crossing detection and pump/motor phase control, and 768 bytes of OTP memory holds complete wash-cycle programs that cannot be reverse-engineered in the field.
Empfohlen
Low-Cost Toys and Educational Electronics
Educational microcontroller kits and low-cost electronic toys use the PIC16HV540-20I/SS as an introductory 8-bit platform because of its small footprint, simple RISC instruction set, and tolerance for unregulated battery power. The 20 MHz clock provides visible blinking-LED and buzzer-driving response, while 768 bytes of OTP holds beginner programs such as chase-light patterns, reaction timers, and simple counters. The industrial temperature grade means the toy remains functional in outdoor or workshop environments, and the wide input voltage tolerance accepts partially discharged batteries without additional regulation, extending play time per charge.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für PIC16HV540-20I/SS – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | PIC16HV540-20/SS | PIC16HV540-04I/SS | PIC16HV540T-20I/SS | PIC16HV540-20I/SO |
|---|---|---|---|---|---|
| Package | 20-SSOP (5.30 mm) | 20-SSOP (5.30 mm) - same | 20-SSOP (5.30 mm) - same | 20-SSOP (5.30 mm) - same | 20-SOIC (12.80 mm) - wider |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Clock Frequency | 20 MHz | 20 MHz | 4 MHz | 20 MHz | 20 MHz |
| Program Memory | 768 B OTP (512 x 12) | 768 B OTP | 768 B OTP | 768 B OTP | 768 B OTP |
| Data RAM | 25 B | 25 B | 25 B | 25 B | 25 B |
| I/O Pins | 12 | 12 | 12 | 12 | 12 |
| HV Shunt Regulator | Yes (integrated) | Yes (integrated) | Yes (integrated) | Yes (integrated) | Yes (integrated) |
| Operating Temperature | -40 C to +85 C (Industrial) | 0 C to +70 C (Commercial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) |
| Memory Type | OTP (One-Time Programmable) | OTP | OTP | OTP | OTP |
| Approx Unit Price @ 1k | USD 1.45 | USD 1.40 (est.) | USD 1.30 (est.) | USD 1.45 (est.) | USD 1.55 (est.) |
Wichtigste Unterscheidungsmerkmale
- Integrated HV shunt regulator eliminates external LDO (vs. PIC16F84)
- OTP code protection for tamper-resistant production firmware (vs. PIC16F88 (flash MCU))
- Industrial -40 C to +85 C temperature grade in a low-cost 20-SSOP (vs. PIC16HV540-20/SS (commercial grade))
Designhinweise
The PIC16HV540's on-chip HV shunt regulator derives VDD from VPP through an internal pass element and an external shunt resistor or Zener network. Per Microchip datasheet DS40197B, the shunt resistor value sets VDD at approximately 5V and dissipates (VPP - VDD) * IDD continuously; for a 12V VPP at 5 mA logic current this is ~35 mW and tolerable, but at a 24V VPP with 10 mA logic current the same resistor dissipates ~190 mW and requires careful thermal management and a 1% tolerance part. Use a 10 uF decoupling capacitor directly on VDD pin 15 and 100 nF high-frequency bypass on VPP pin 14 to suppress regulator ripple that could couple into ADC-less analog sensing circuits.
OTP-based PIC16HV540 SSOP packages have moderate theta_JA around 90 C/W on a 1-oz 2-layer board. Estimated: at VPP=15V, IDD=10 mA, ambient=70 C, junction rise is approximately (15-5)V * 0.01A * 90 C/W = 9 C above ambient, giving Tj ~ 79 C - well within industrial limits. At VPP=24V the rise becomes ~17 C, still acceptable; above VPP=30V the rise hits ~23 C and may push Tj beyond limits, so cap continuous VPP at 30V or use a pre-regulator for higher-voltage bus designs.
For SSOP-20 layout, allocate at least 0.2 mm clearance between the IC body and adjacent traces, and route the VPP/VDD pair with 0.5 mm trace width to handle the shunt regulator current. Place the external shunt resistor within 5 mm of pin 14 (VPP) to minimize parasitic inductance that could cause regulator oscillation; per the Microchip datasheet reference design, a 100 nF ceramic in parallel with the bulk decoupling suppresses high-frequency ringing. Keep the oscillator traces short and surround them with a ground guard ring to avoid coupling switching noise into the clock input.
The most common mistake is treating the PIC16HV540's VPP pin like a regular VDD on a non-HV PIC microcontroller - VPP is the high-voltage input to the internal shunt regulator and must carry the shunt resistor to ground, not connect directly to a regulated 5V supply without the shunt path. Skipping the shunt resistor will prevent internal regulation and may damage the device. Another common pitfall is programming the part with the wrong oscillator configuration: RC mode vs XT mode selection in the configuration word changes the oscillator gain and timing margin; consult the datasheet oscillator tables for the specific crystal or RC network values.
Because OTP devices cannot be re-flashed for firmware iteration, build prototypes with the PIC16HV540/JW windowed ceramic package for development - this allows UV erasure and repeated programming cycles to validate firmware before committing to the SSOP OTP production variant. During OTP programming, ensure VPP rises to the datasheet-specified level (typically 13.0-13.5V) within the rise-time specification, or programming may fail silently and produce a partially-programmed device that appears functional until locked bits are tested.
Compliance-Informationen
RoHS/REACH/lead-free/halogen-free status not explicitly stated in the verified distributor snippets; Microchip's standard policy is RoHS compliance for SSOP-20 surface-mount parts, but explicit certification should be confirmed against the manufacturer declaration before use in restricted-substance designs. AEC-Q100 not qualified - use PIC16HV540-20I/SS only in non-safety automotive body applications.
