PIC16HV540-20/SO - 8-Bit 20MHz OTP MCU 768B | Microchip
Teilenummer: PIC16HV540-20/SO ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 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 Übersicht
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.
Drop-in-Alternativen für PIC16HV540-20/SO – 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 PIC16HV540-20/SO (gleiche Bauform und Footprint) – abweichend in Package, Core Architecture, On-chip Voltage Regulator, Operating Temperature, Program Memory Size.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
PIC16HV540-04I/SO
✅ Drop-In✓ Auf Lager
$1.78 / Stück
Datenblatt ansehen →PIC16HV540-04I/P
✅ Drop-In✓ Auf Lager
$1.85 / Stück
Datenblatt ansehen →PIC16HV540/JW
✅ Drop-In✓ Auf Lager
$6.9 / Stück
Datenblatt ansehen →PIC16HV540-20/SO Grenzwerte & elektrische Eigenschaften
| Core Architecture | 8-bit Enhanced PIC16C5x |
| Program Memory | 768B (512 x 12) OTP |
| RAM | 25 bytes |
| I/O Pins | 12 |
| Maximale Taktfrequenz | 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) |
| Gehäuse | 18-SOIC (0.295", 7.50 mm width) |
| Montageart | Surface Mount |
| Betriebstemperatur | 0C to +70C (commercial; -20C variants available) |
| Watchdog Timer | Yes |
| Power-On Reset | Yes |
| MSL-Level | 1 (unlimited floor life at <30C / 85% RH) |
PIC16HV540-20/SO Pin-Konfiguration
| 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 |
Typische Anwendungen
PIC16HV540-20/SO ist geeignet für 6 Anwendungs: 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.
Empfohlen
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.
Empfohlen
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.
Empfohlen
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.
Empfohlen
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.
Empfohlen
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.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für PIC16HV540-20/SO – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | 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 |
Wichtigste Unterscheidungsmerkmale
- On-chip HV shunt regulator accepts 3.5-15V directly (vs. PIC16C54-20/SO (no HV regulator))
- Commercial 20MHz speed grade available in SOIC-18 (vs. PIC16HV540-04I/SO (industrial 4MHz))
- Same-footprint alternative in industrial temperature grade (vs. PIC16HV540-04I/SO)
Designhinweise
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.
Compliance-Informationen
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.