PIC16LC56A-04I/SS - 4MHz 8-bit OTP MCU, 1.5KB | Microchip
Référence : PIC16LC56A-04I/SS ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $2.27 | $2,27 |
| 10 | $2.04 | $20,40 |
| 100 | $1.82 | $182,00 |
| 500 | $1.63 | $815,00 |
| 1 000 | $1.45 | $1 450,00 |
PIC16LC56A-04I/SS Présentation
What is an 8-bit OTP microcontroller? An 8-bit MCU is a microcontroller whose central processing unit operates on 8-bit data words and is purpose-built for low-cost, deterministic control applications. OTP memory allows the user to program the device once after manufacture, which lowers unit cost relative to UV-erasable EPROM and eliminates the quartz window required for erasure. Within the broader hierarchy, an 8-bit MCU sits below 32-bit microcontrollers but offers the lowest BOM cost and smallest die area for applications that do not require DSP, graphics, or connectivity stacks.
Key features of the PIC16LC56A-04I/SS include a fully static CMOS design with 33 single-word instructions, a 12-bit instruction word for 2:1 code compression versus other 8-bit MCUs in its class, an 8-bit real-time clock/counter, a watchdog timer for unattended operation, and a power-on reset circuit. The 20-pin SSOP package supports surface-mount assembly while providing 12 GPIO pins for digital interfacing.
Architecturally, the device uses a RISC-style Harvard bus with separate program and data paths, a 2-level hardware stack, and direct/indirect addressing modes. The CMOS process delivers low quiescent current suitable for battery-powered products, and the 4 MHz maximum oscillator frequency keeps dynamic power consumption low.
Typical applications include appliance controls, HVAC fan controllers, simple sensor interfaces, automotive body electronics (non-safety), low-end consumer products, and battery chargers. The wide 3.0 V to 6.25 V supply range allows direct connection to 4-cell battery stacks or regulated 5 V rails.
When designing with this part, note that OTP memory cannot be re-programmed in-circuit. Engineers should plan for development on a windowed CERDIP variant (PIC16LC56A-04I/JW) and finalize firmware before committing to OTP. A 100 nF decoupling capacitor close to VDD and proper oscillator layout are recommended for EMI robustness.
This page synthesizes distributor pricing, drop-in alternatives, and practical design considerations for the PIC16LC56A-04I/SS that are not collected in any single manufacturer datasheet, giving procurement and engineering teams a single reference for sourcing and second-sourcing decisions.
Alternatives de remplacement direct pour PIC16LC56A-04I/SS — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec PIC16LC56A-04I/SS (même facteur de forme et même empreinte) — différant par Program Memory Size, Package, Operating Temperature, I/O Pins, RAM Size.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC16LC56AT-04I/SS
✅ Remplacement direct✓ En stock
$2.05 / unité
Voir la fiche technique →PIC16LC56A-04/SS
✅ Remplacement direct✓ En stock
$0.6 / unité
Voir la fiche technique →PIC16LC558-04I/SS
✅ Remplacement direct✓ En stock
$1.38 / unité
Voir la fiche technique →PIC16LC54A-04I/SS
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC16LC56A-04I/SS Valeurs maximales et caractéristiques électriques
| Product Family | PIC16C5X |
| Core Architecture | 8-bit RISC Harvard |
| Program Memory Type | OTP (One-Time Programmable EPROM) |
| Program Memory Size | 1.5 KB (1K x 12) |
| RAM | 25 bytes |
| Fréquence d'horloge maximale | 4 MHz |
| Instruction Set Width | 12-bit |
| Number of Instructions | 33 |
| Supply Voltage (Vdd) | 3.0 V to 6.25 V |
| Number of I/O Pins | 12 |
| Timers | 1 x 8-bit RTCC + Watchdog Timer |
| Boîtier | 20-pin SSOP (0.209", 5.30 mm width) |
| Température de fonctionnement | -40 C to +85 C (Industrial, "I") |
| Type de montage | Surface Mount |
Configuration des broches de PIC16LC56A-04I/SS
| Broche 1 | RA3 — Bidirectional I/O pin, PORTA bit 3 |
| Broche 2 | RA2 — Bidirectional I/O pin, PORTA bit 2 |
| Broche 3 | RA1 — Bidirectional I/O pin, PORTA bit 1 |
| Broche 4 | RA0 — Bidirectional I/O pin, PORTA bit 0 |
| Broche 5 | OSC1/CLKIN — Oscillator input / external clock input |
| Broche 6 | OSC2/CLKOUT — Oscillator output / clock output (crystal mode) |
| Broche 7 | RC0 — Bidirectional I/O pin, PORTC bit 0 |
| Broche 8 | RC1 — Bidirectional I/O pin, PORTC bit 1 |
| Broche 9 | RC2 — Bidirectional I/O pin, PORTC bit 2 |
| Broche 10 | RC3 — Bidirectional I/O pin, PORTC bit 3 |
| Broche 11 | VSS — Ground reference |
| Broche 12 | T0CKI — Timer0 clock input (also RB0) |
| Broche 13 | RB0 — Bidirectional I/O pin, PORTB bit 0 (shared with T0CKI) |
| Broche 14 | RB1 — Bidirectional I/O pin, PORTB bit 1 |
| Broche 15 | RB2 — Bidirectional I/O pin, PORTB bit 2 |
| Broche 16 | RB3 — Bidirectional I/O pin, PORTB bit 3 |
| Broche 17 | RB4 — Bidirectional I/O pin, PORTB bit 4 |
| Broche 18 | RB5 — Bidirectional I/O pin, PORTB bit 5 |
| Broche 19 | RB6 — Bidirectional I/O pin, PORTB bit 6 |
| Broche 20 | RB7 — Bidirectional I/O pin, PORTB bit 7 |
Applications typiques
PIC16LC56A-04I/SS convient pour 7 applications: Appliance Control Boards, HVAC Fan and Blower Controllers, Battery-Powered Sensor Interfaces, Automotive Body Electronics (Non-Safety), Low-End Consumer Remote Controls, Simple Battery Chargers and Power Controllers, Industrial Timer and Counter Modules.
Appliance Control Boards
The PIC16LC56A-04I/SS fits appliance control boards because its 1.5 KB OTP memory is sufficient for washing-machine, dishwasher, and microwave state-machine firmware, while the 12 GPIO pins directly drive relays, triac drivers, and seven-segment displays without external mux logic. Operating from 3.0 V to 6.25 V, it tolerates unregulated supply rails derived from capacitive-drop or transformer-rectified power stages common in white goods. The 4 MHz clock keeps switching noise out of the mains-frequency band, simplifying EMI compliance for IEC 55014-1 household appliance tests, and the industrial -40 C to +85 C temperature range covers unheated garages and outdoor enclosures.
Recommandé
HVAC Fan and Blower Controllers
In HVAC fan-speed and blower controllers the PIC16LC56A-04I/SS provides deterministic timing via its 8-bit RTCC and watchdog timer, generating zero-cross triac triggers without DSP overhead. The 12 GPIO channels handle tachometer input, multiple speed-tap relays, and LED status indicators simultaneously, and the 33-instruction PIC16C5X RISC core executes the control loop in single-cycle instructions, giving a sub-microsecond response that improves fan-start torque and reduces audible switching transients. Operating down to 3.0 V, the MCU also tolerates brown-out conditions common in compressor-induced supply dips.
Recommandé
Battery-Powered Sensor Interfaces
The PIC16LC56A-04I/SS suits low-duty-cycle sensor interfaces because the CMOS LC process variant draws microamp-level quiescent current from a 3.0 V to 6.25 V battery stack, while the watchdog timer wakes the MCU periodically to read sensors and transmit via GPIO bit-banging. With 25 bytes of RAM, the part can buffer a handful of 8-bit ADC samples from an external sensor before transmitting, and the 4 MHz clock supports UART-style encoding at standard baud rates. This combination delivers multi-year battery life for remote controls, smoke detectors, and wireless sensor nodes where every microamp matters.
Recommandé
Automotive Body Electronics (Non-Safety)
The PIC16LC56A-04I/SS supports non-safety automotive body applications such as seat-control switches, mirror-position encoders, and interior lighting timers, where its industrial -40 C to +85 C rating covers cabin temperatures and the 4 MHz clock is plenty for switch-debouncing and PWM LED driving. The 12-bit instruction set keeps relay-flick and LED-flash firmware compact, leaving room for diagnostic counters in OTP. Designers targeting AEC-Q100 automotive qualification should migrate to a Q-graded PIC16F derivative; the PIC16LC56A-04I/SS itself is suitable only for non-safety retrofit modules.
Recommandé
Low-End Consumer Remote Controls
For low-end IR/RF remote controls the PIC16LC56A-04I/SS integrates 12 GPIO that directly drive IR-LED transistors, key-scan matrices, and indicator LEDs without external glue logic. The 33-instruction PIC16C5X core runs the key-debounce, transmit-encoder, and sleep state machine in less than 1 KB of OTP, and the watchdog timer keeps the device responsive after long button-idle periods. Powered from two or three alkaline cells (3.0 V to 6.25 V), it extends remote-control battery life beyond one year under typical use.
Recommandé
Simple Battery Chargers and Power Controllers
The PIC16LC56A-04I/SS fits simple NiCd/NiMH battery chargers and CC/CV power controllers because its 12 GPIO can drive MOSFET gate drivers, monitor voltage dividers via comparator inputs, and toggle status LEDs in real time. The 33-instruction core executes CC/CV state machines with deterministic timing, eliminating the need for an op-amp-only analog controller and giving firmware-based charge-termination logic. Operating up to 6.25 V, the MCU works directly from a 4-cell battery stack or a regulated 5 V wall-adapter rail.
Recommandé
Industrial Timer and Counter Modules
For DIN-rail industrial timers, event counters, and conveyor-control modules the PIC16LC56A-04I/SS provides the 8-bit RTCC, watchdog, and 12 GPIO needed for relay sequencing, pulse counting, and front-panel LED indication in a single SSOP-20 chip. The wide 3.0 V to 6.25 V supply range tolerates 24 V industrial rails after regulation, and the -40 C to +85 C industrial temperature grade handles unheated control cabinets. OTP memory locks the firmware against field tampering, which is desirable in metrology and safety-timer applications where firmware changes must be controlled at the factory.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC16LC56A-04I/SS — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC16LC56AT-04I/SS | PIC16LC56A-04/SS | PIC16LC558-04I/SS | PIC16LC54A-04I/SS | PIC16LC56A-04I/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SSOP-20 (0.209", 5.30 mm width) | SSOP-20 (same footprint) | SSOP-20 (same footprint) | SSOP-20 (same footprint) | SSOP-20 (same footprint) | PDIP-20 (through-hole, not drop-in SMD) |
| Program Memory | 1.5 KB (1K x 12) OTP | 1.5 KB (1K x 12) OTP | 1.5 KB (1K x 12) OTP | 2.25 KB (2K x 12) OTP (+50%) | 0.75 KB (512 x 12) OTP (-50%) | 1.5 KB (1K x 12) OTP |
| RAM | 25 bytes | 25 bytes | 25 bytes | 73 bytes (+192%) | 25 bytes | 25 bytes |
| Maximum Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Supply Voltage | 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 6.25 V | 3.0 V to 6.25 V | 3.0 V to 6.25 V |
| Operating Temperature | -40 C to +85 C (Industrial) | -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) |
| Number of I/O Pins | 12 | 12 | 12 | 13 (+1) | 12 | 12 |
Principaux différenciateurs
- Lowest-cost Microchip OTP MCU in the SSOP-20 footprint (vs PIC16F15344T-I/SS)
- Industrial-temperature grade in a 20-pin SSOP (vs PIC16LC56A-04/SS)
- Compact 20-pin SSOP for surface-mount assembly (vs PIC16LC56A-04I/P)
Notes de conception
Because PIC16LC56A-04I/SS uses OTP memory, you cannot iterate firmware on the production package. Always develop on the windowed CERDIP variant PIC16LC56A-04I/JW and verify code size, instruction timing, and I/O mapping under -40 C to +85 C before committing to OTP. Allow an emulator (e.g., MPLAB ICE 2000 with a PIC16C5X adapter) for breakpoints, since OTP parts cannot be reset in-circuit. Also note that the PIC16C5X core has only a 2-level hardware stack - deeply nested subroutines will silently overflow and corrupt program flow.
Place a 100 nF decoupling capacitor within 5 mm of the VDD pin and a bulk capacitor (>= 10 uF) at the regulator output to suppress the digital switching noise of the 4 MHz clock. Keep the oscillator traces (OSC1/OSC2) short and shield them with a ground pour; long traces inject EMI into adjacent analog sections. For surface-mount assembly on the SSOP-20 footprint, follow IPC-7351 land-pattern recommendations and add a small thermal relief pattern on the GND pin to ease hand rework without lifting the pad.
Although the LC process variant draws microamp-level quiescent current, the dynamic supply current scales linearly with clock frequency; at 4 MHz with all 12 GPIO toggling, plan for 2-5 mA peak. Use a low-dropout regulator such as a Microchip MCP1700 with >= 1 uF ceramic output capacitor to keep the supply rail within 3.0 V to 6.25 V even under transient load. For battery-powered designs, switch off unused peripherals via the OPTION2 register and put the MCU in SLEEP mode (watchdog still active) to extend battery life.
Informations de conformité
RoHS, REACH, lead-free finish, halogen-free, and conflict-mineral status were not present in the verified web data; consult Microchip's PIC16C5X material declaration sheets before committing to a regulated market. The PIC16C5X family is generally treated as a long-life-cycle industrial component, not AEC-Q100 qualified for automotive safety.
