PIC16LC56A-04I/SS - 4MHz 8-bit OTP MCU, 1.5KB | Microchip
MPN: PIC16LC56A-04I/SS ✓ Hoạt độngPIC16LC56A-04I/SS Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho PIC16LC56A-04I/SS — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC16LC56A-04I/SS (cùng hình factor và footprint) — khác nhau ở Program Memory Size, Package, Operating Temperature, I/O Pins, RAM Size.
PIC16LC56AT-04I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC56A-04/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC558-04I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC54A-04I/SS
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LC56A-04I/SS Tỷ lệ tối đa & tính chất điện
| 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 |
| Tần số xung maksimum | 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 |
| Hộp | 20-pin SSOP (0.209", 5.30 mm width) |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial, "I") |
| Kiểu lắp đặt | Surface Mount |
Cấu hình chân PIC16LC56A-04I/SS
| Chân 1 | RA3 — Bidirectional I/O pin, PORTA bit 3 |
| Chân 2 | RA2 — Bidirectional I/O pin, PORTA bit 2 |
| Chân 3 | RA1 — Bidirectional I/O pin, PORTA bit 1 |
| Chân 4 | RA0 — Bidirectional I/O pin, PORTA bit 0 |
| Chân 5 | OSC1/CLKIN — Oscillator input / external clock input |
| Chân 6 | OSC2/CLKOUT — Oscillator output / clock output (crystal mode) |
| Chân 7 | RC0 — Bidirectional I/O pin, PORTC bit 0 |
| Chân 8 | RC1 — Bidirectional I/O pin, PORTC bit 1 |
| Chân 9 | RC2 — Bidirectional I/O pin, PORTC bit 2 |
| Chân 10 | RC3 — Bidirectional I/O pin, PORTC bit 3 |
| Chân 11 | VSS — Ground reference |
| Chân 12 | T0CKI — Timer0 clock input (also RB0) |
| Chân 13 | RB0 — Bidirectional I/O pin, PORTB bit 0 (shared with T0CKI) |
| Chân 14 | RB1 — Bidirectional I/O pin, PORTB bit 1 |
| Chân 15 | RB2 — Bidirectional I/O pin, PORTB bit 2 |
| Chân 16 | RB3 — Bidirectional I/O pin, PORTB bit 3 |
| Chân 17 | RB4 — Bidirectional I/O pin, PORTB bit 4 |
| Chân 18 | RB5 — Bidirectional I/O pin, PORTB bit 5 |
| Chân 19 | RB6 — Bidirectional I/O pin, PORTB bit 6 |
| Chân 20 | RB7 — Bidirectional I/O pin, PORTB bit 7 |
Ứng dụng tiêu biểu
PIC16LC56A-04I/SS phù hợp cho 7 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LC56A-04I/SS — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Lowest-cost Microchip OTP MCU in the SSOP-20 footprint (vsPIC16F15344T-I/SS)
- Industrial-temperature grade in a 20-pin SSOP (vsPIC16LC56A-04/SS)
- Compact 20-pin SSOP for surface-mount assembly (vsPIC16LC56A-04I/P)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
