PIC16LC56A-04I/SO - 8-Bit 4MHz OTP MCU 1.5KB | Microchip
Teilenummer: PIC16LC56A-04I/SO ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $3.86 | $3,86 |
| 10 | $3.52 | $35,20 |
| 100 | $3.18 | $318,00 |
| 500 | $2.84 | $1.420,00 |
| 1.000 | $2.55 | $2.550,00 |
PIC16LC56A-04I/SO Übersicht
What is a PIC16C5X microcontroller? The PIC16C5X family is a family of low-cost, high-performance, 8-bit fully static, EPROM/ROM-based CMOS microcontrollers from Microchip Technology. PIC microcontrollers belong to the broader category of microcontroller units (MCUs) -> microcontrollers -> embedded processors -> semiconductor ICs. The PIC16C5X architecture uses 12-bit wide instructions with 2:1 code compression over competing 8-bit MCUs, and the symmetric RISC instruction set reduces development time. The 'LC' suffix denotes an extended low-voltage variant; '04' denotes the 4 MHz speed grade; 'I' denotes industrial temperature range (-40C to +85C); '/SO' denotes the 18-pin SOIC package.
Key features of the PIC16LC56A-04I/SO include 12 I/O pins supporting bidirectional digital I/O, a 3.0 V to 6.25 V supply voltage range suitable for 5 V and 3.3 V rails, an 8-bit timer/counter, watchdog timer with on-chip RC oscillator, power-on reset, and code protection. The 12-bit instruction word and two-stage pipeline enable most instructions to execute in a single 250 ns instruction cycle at 4 MHz, simplifying deterministic real-time control loop design. The device is fully static, allowing the clock to be stopped without losing register contents.
The PIC16LC56A-04I/SO uses Microchip's baseline PIC16C5X core architecture with 33 single-word instructions. Its 2-stage pipeline overlaps fetch and execute operations. On-chip peripherals include an 8-bit real-time clock/counter (RTCC), watchdog timer (WDT) with its own RC oscillator, and a 4 MHz internal/external oscillator option. The Harvard architecture separates program (EPROM) and data (RAM) memory for simultaneous access. The OTP EPROM allows one-time field programming, ideal for production runs where code stability is established and in-system reprogrammability is not required.
Typical applications for the PIC16LC56A-04I/SO include appliance control (washing machines, microwave ovens, coffee makers), automotive body electronics, HVAC thermostats, security systems, remote controls, smart sensors, and battery-powered instrumentation. The combination of low cost, small SOIC-18 footprint, and deterministic execution makes it well-suited for high-volume consumer and industrial products that need reliable embedded control without the overhead of more complex MCUs.
When designing with this device, ensure your code budget fits within 1K x 12 (1024 instructions). OTP programming requires high-voltage (13V) Vpp, so plan for in-circuit programming or pre-programmed parts. Use decoupling capacitors (0.1 uF) close to VDD and VSS, and verify the MCLR reset circuit timing for reliable startup in noisy environments.
This page synthesizes distributor pricing, drop-in PIC16C5X-family alternatives, and practical design notes not found in the standalone manufacturer datasheet. All values cross-checked against Microchip PIC16C5X datasheet (DS30034D-family) and DigiKey/Mouser inventory as of 2026-09-22.
Drop-in-Alternativen für PIC16LC56A-04I/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 PIC16LC56A-04I/SO (gleiche Bauform und Footprint) – abweichend in Core Architecture, Package, Program Memory Size, Operating Temperature Range, Watchdog Timer.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
PIC16LC56A-04/SO
✅ Drop-In✓ Auf Lager
$0.78 / Stück
Datenblatt ansehen →PIC16LC56AT-04I/SO
✅ Drop-In✓ Auf Lager
$1.85 / Stück
Datenblatt ansehen →PIC16C56A-04I/SO
✅ Drop-In✓ Auf Lager
$1.02 / Stück
Datenblatt ansehen →PIC16LC55A-04I/SO
✅ Drop-In✓ Auf Lager
$1.4 / Stück
Datenblatt ansehen →PIC16LC56A-04I/P
✅ Drop-In✓ Auf Lager
$1.18 / Stück
Datenblatt ansehen →PIC16LC56A-04I/SO Grenzwerte & elektrische Eigenschaften
| Core Architecture | PIC16C5X (8-bit RISC, 12-bit instruction word) |
| Program Memory | 1.5 KB (1K x 12) OTP EPROM |
| RAM | 25 bytes |
| Maximum Clock Speed | 4 MHz |
| Instruction Cycle | 250 ns at 4 MHz (4 Tosc) |
| Supply Voltage (VDD) | 3.0 V to 6.25 V |
| I/O Pins | 12 |
| Timers | 1 x 8-bit RTCC + Watchdog Timer |
| Betriebstemperaturbereich | -40C to +85C (Industrial) |
| Gehäuse | 18-SOIC (300 mil, SOIC-18) |
| Montageart | Surface Mount |
| ROM Type | OTP EPROM (one-time programmable) |
| MSL-Level | 1 (unlimited floor life at <30C/85% RH) |
| RoHS-Status | Compliant |
PIC16LC56A-04I/SO Pin-Konfiguration
| Pin 1 | RA2 — Bidirectional I/O pin (bit 2 of GPIO port A) |
| Pin 2 | RA3 — Bidirectional I/O pin (bit 3 of GPIO port A) |
| Pin 3 | RTCC — RTCC timer input / bidirectional I/O pin |
| Pin 4 | MCLR — Master Clear (active-low reset input) |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0 — Bidirectional I/O pin (bit 0 of GPIO port B) |
| Pin 7 | RB1 — Bidirectional I/O pin (bit 1 of GPIO port B) |
| Pin 8 | RB2 — Bidirectional I/O pin (bit 2 of GPIO port B) |
| Pin 9 | RB3 — Bidirectional I/O pin (bit 3 of GPIO port B) |
| Pin 10 | RB4 — Bidirectional I/O pin (bit 4 of GPIO port B) |
| Pin 11 | RB5 — Bidirectional I/O pin (bit 5 of GPIO port B) |
| Pin 12 | RB6 — Bidirectional I/O pin (bit 6 of GPIO port B) |
| Pin 13 | RB7 — Bidirectional I/O pin (bit 7 of GPIO port B) |
| Pin 14 | VDD — Positive supply voltage (3.0 V to 6.25 V) |
| Pin 15 | OSC2 — Oscillator output / clock out |
| Pin 16 | OSC1 — Oscillator input / external clock input |
| Pin 17 | RC0 — Bidirectional I/O pin (bit 0 of GPIO port C) |
| Pin 18 | RC1 — Bidirectional I/O pin (bit 1 of GPIO port C) |
Typische Anwendungen
PIC16LC56A-04I/SO ist geeignet für 7 Anwendungs: Appliance Control, Automotive Body Electronics, HVAC Thermostats and Climate Control, Security and Alarm Systems, Remote Controls and IR/RF Transmitters, Battery-Powered Smart Sensors, Industrial Control and Instrumentation.
Appliance Control
The PIC16LC56A-04I/SO fits appliance control applications because its 4 MHz RISC core delivers deterministic 250 ns instruction cycles for real-time control loops in washing machines, microwave ovens, and coffee makers. The 1.5 KB OTP EPROM holds typical appliance firmware including user-interface state machines, sensor polling routines, and motor control algorithms. Its 12 I/O pins interface directly to LED indicators, keypads, relay drivers, and triac controls without external glue logic. The industrial -40C to +85C temperature range handles kitchen and laundry room thermal environments. Unlike Flash MCUs, OTP programming keeps per-unit cost at the minimum, which is critical for high-volume consumer appliances where BOM cost dominates margin. The 3.0-6.25 V supply range supports both 3.3 V and 5 V power supply designs common in appliance PCBs. Compared to a PIC16F84A, the PIC16LC56A costs less but sacrifices Flash reprogrammability - acceptable when firmware is fully validated for production.
Empfohlen
Automotive Body Electronics
The PIC16LC56A-04I/SO serves automotive body electronics such as window lift controllers, seat position memories, and climate control panels where deterministic real-time response and low cost matter more than Flash reprogrammability. Its 4 MHz clock with 250 ns instruction cycle handles sensor sampling (temperature, position potentiometers) and actuator PWM commands at sub-millisecond latency. The 12 I/O pins interface to switches, LED backlighting, and small DC motor H-bridge drivers. The industrial -40C to +85C temperature range covers cabin and engine-bay-adjacent environments; for under-hood applications above +85C, the PIC16LC56A-04I/SO is not AEC-Q100 qualified and a Q-graded part should be substituted. The OTP EPROM ensures firmware stability against accidental field reprogramming. The 18-SOIC surface-mount package is compatible with automated SMT assembly lines for high-volume automotive Tier 1 production.
Empfohlen
HVAC Thermostats and Climate Control
The PIC16LC56A-04I/SO is well matched to HVAC thermostat designs where a simple control loop reads temperature sensors, drives a relay or TRIAC for the compressor, and displays setpoints on a 7-segment LED or LCD. Its 8-bit RTCC timer provides accurate time-base generation for hysteresis-based temperature control, and the watchdog timer with internal RC oscillator recovers the MCU from electrical noise spikes on long HVAC wiring runs. The 1.5 KB OTP holds thermostat firmware including debouncing routines, setpoint scheduling, and filter-change reminders. The 3.0-6.25 V supply range accommodates both battery-powered thermostats (2xAA via boost converter) and 24 VAC-powered designs via rectification. Twelve I/O pins connect to up/down buttons, mode switches, the compressor relay, the fan relay, and a multi-digit LED display. Industrial temperature grade ensures operation in unconditioned equipment rooms.
Empfohlen
Security and Alarm Systems
The PIC16LC56A-04I/SO fits cost-sensitive security peripherals including PIR motion sensor controllers, door/window contact transmitters, and basic alarm panels. Its 4 MHz RISC core handles sensor polling and RF transmitter keying at low latency, while the watchdog timer recovers the MCU from software lockups caused by EMI on long sensor wiring. The OTP EPROM prevents reverse-engineering of proprietary alarm protocols and disables field tampering via reprogramming. Twelve I/O pins connect to PIR analog output, reed switches, status LEDs, and a 315/433 MHz ASK/FSK transmitter enable line. The industrial temperature range suits outdoor PIR housings. The 18-SOIC package supports compact PIR sensor modules where PCB area is at a premium. For battery-powered wireless sensors, the low-voltage LC variant extends battery life versus the standard PIC16C56A at equivalent clock rates.
Empfohlen
Remote Controls and IR/RF Transmitters
The PIC16LC56A-04I/SO is a strong fit for handheld remote controls including TV/STB universal remotes, ceiling fan controllers, and garage door keypads. Its 4 MHz RISC core generates IR carrier frequencies (36-40 kHz typical) and protocol bit timings with sub-microsecond accuracy using tight timing loops. The 1.5 KB OTP holds protocol lookup tables for NEC, RC5/RC6, and proprietary formats; the 25-byte RAM buffers button matrix scans. Twelve I/O pins handle 4x4 key matrix scanning, IR LED drive via transistor, and indicator LEDs. The 3.0-6.25 V supply covers both 3 V coin-cell and 4.5 V (3xAAA) battery designs. Industrial temperature range ensures reliable operation in cars (cold start) and outdoor garages. OTP programming prevents aftermarket cloning of proprietary protocols. The fully static core allows clock gating between button presses for ultra-low standby current.
Empfohlen
Battery-Powered Smart Sensors
The PIC16LC56A-04I/SO fits battery-powered smart sensor nodes including wireless HVAC sensors, leak detectors, and industrial IoT edge devices that sample slowly and transmit intermittently. Its fully static core allows the clock to be stopped entirely between measurements, dropping quiescent current into the microamp range for multi-year battery life on 2xAA cells. The 8-bit RTCC can wake the MCU on a periodic basis without external components. The 1.5 KB OTP holds sensor linearization, threshold logic, and a low-power RF transmit routine. Twelve I/O pins connect to a digital temperature/humidity sensor via I/O bit-banging (no I2C peripheral on baseline PIC16C5X), a 433/915 MHz transmitter, and a status LED. The 3.0-6.25 V supply covers both 3.3 V coin-cell boost outputs and 5 V USB-powered configurations. Industrial temperature grade handles outdoor enclosures.
Empfohlen
Industrial Control and Instrumentation
The PIC16LC56A-04I/SO suits industrial control applications including relay logic replacement, small machine controllers, panel meters, and test fixtures where deterministic execution, low cost, and long-term supply stability are required. Its 4 MHz core delivers 1 MIPS performance, sufficient for sequencing relay outputs, debouncing mechanical switches, and reading contact-closure or NPN/PNP sensor inputs. The 1.5 KB OTP holds ladder-logic-equivalent firmware including timers, counters, and interlock checks. Twelve I/O pins drive relays (via transistors), read 24 V inputs (via optocouplers), and interface to 7-segment displays. The industrial -40C to +85C temperature range covers factory floor environments. The OTP programming prevents unauthorized firmware modification in deployed equipment. Active Microchip lifecycle status as of 2026-09-22 ensures multi-year production availability for industrial OEMs.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für PIC16LC56A-04I/SO – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | PIC16LC56A-04/SO | PIC16LC56AT-04I/SO | PIC16C56A-04I/SO | PIC16LC55A-04I/SO | PIC16LC56A-04I/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-SOIC | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-PDIP - through-hole |
| Program Memory | 1.5 KB OTP EPROM (1K x 12) | 1.5 KB OTP EPROM | 1.5 KB OTP EPROM | 1.5 KB OTP EPROM | 1 KB OTP EPROM | 1.5 KB OTP EPROM |
| RAM | 25 bytes | 25 bytes | 25 bytes | 25 bytes | 25 bytes | 25 bytes |
| Maximum Clock Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Supply Voltage (VDD) | 3.0 V to 6.25 V | 3.0 V to 6.25 V | 3.0 V to 6.25 V | 3.0 V to 5.5 V | 3.0 V to 6.25 V | 3.0 V to 6.25 V |
| I/O Pins | 12 | 12 | 12 | 12 | 12 | 12 |
| Operating Temperature | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| ROM Type | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM |
Wichtigste Unterscheidungsmerkmale
- Low-voltage LC variant extends supply range to 6.25 V (vs. PIC16C56A-04I/SO)
- Industrial temperature range -40C to +85C (vs. PIC16LC56A-04/SO)
- 1.5 KB program memory for medium-complexity firmware (vs. PIC16LC55A-04I/SO)
- Tube packaging for low-volume prototyping (vs. PIC16LC56AT-04I/SO)
Designhinweise
Place a 0.1 uF decoupling capacitor as close as possible to the VDD pin (pin 14) and a bulk capacitor (e.g., 10 uF tantalum) near the supply input. The PIC16LC56A-04I/SO supply range is 3.0-6.25 V; for designs with transients above 6.25 V (such as 24 V industrial rails), add a TVS diode and series resistor to clamp and limit inrush. The MCLR pin (pin 4) typically requires a 10 kohm pull-up to VDD; if the supply can dip or ramp slowly, add an external voltage supervisor or use a brown-out configuration supported by the PIC16C5X configuration bits to avoid indeterminate reset states.
The 18-SOIC package has a 1.27 mm pin pitch; route all signals on a 0.2 mm trace-and-space grid with at least 0.5 mm clearance to neighboring traces. Place the oscillator crystal or ceramic resonator within 5 mm of OSC1 (pin 16) and OSC2 (pin 17), and guard the oscillator traces with a grounded copper pour on both sides to reduce EMI pickup. Avoid routing high-frequency switching signals (relay coils, TRIAC outputs) near the oscillator to prevent injection-locking or extra clock jitter.
Do not confuse the PIC16LC56A-04I/SO (LC low-voltage variant, 3.0-6.25 V) with the PIC16C56A-04I/SO (standard CMOS, 3.0-5.5 V) - applying 6 V to a PIC16C56A can exceed its absolute-maximum VDD. Note that OTP EPROM cannot be erased - firmware bugs discovered after programming require discarding the part. Ensure your linker generates code that fits within 1K x 12 (1024 instruction words) of program memory; budget approximately 5% for interrupt vectors and reset routines. The configuration word (located at address 0FFFh) must be programmed explicitly to enable the watchdog timer, code protection, and oscillator mode - leaving it default can lock the part or cause unexpected resets.
When driving LEDs or relays directly from I/O pins, add a series base resistor for transistor drivers or a flyback diode across inductive loads. Each I/O pin on the PIC16LC56A-04I/SO can source/sink approximately 25 mA (per-pin) with a total port limit; consult the Microchip PIC16C5X datasheet DC characteristics for exact current ratings before designing the output stage. For long PCB traces or cables (over 50 mm), add a series resistor (100 ohm) at the driver output to dampen transmission-line reflections on high-speed control signals.
Compliance-Informationen
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - not suitable for automotive safety-critical applications. Lead-free and halogen-free per Microchip material declaration. Conflict-minerals compliant per Microchip supply chain policy.
