PIC16C56-LPI/SS - 1.5KB OTP 8-bit MCU | Microchip | 20-SSOP
MPN: PIC16C56-LPI/SS ✓ Hoạt độngPIC16C56-LPI/SS Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and configurable I/O peripherals. The PIC16C5X family from Microchip is one of the earliest RISC-architecture 8-bit MCU lines, positioned as a low-cost, high-performance, fully-static, EPROM/ROM-based solution intended for high-volume consumer and industrial control. The PIC16C56 is the smallest-memory member of this family, sitting in the product taxonomy as: PIC16C56 -> PIC16C5X family -> PIC16C base series -> 8-bit PIC microcontrollers -> microcontrollers -> embedded semiconductors.
Key features include 12-bit wide instructions, a two-level deep hardware stack, direct/indirect/relative addressing modes, an 8-bit real-time clock/counter (TMR0), and seven or eight special-function hardware registers. The "LP" oscillator mode prefix indicates a low-power 32.768 kHz crystal designator, and the "I" suffix denotes the industrial operating-temperature range of -40 °C to +85 °C.
The architecture is a Harvard-class RISC core that fetches a 12-bit instruction from program memory while simultaneously accessing an 8-bit data operand from RAM, allowing most instructions to complete in a single instruction cycle. Two-level hardware stack simplifies interrupt-free control flow and keeps the silicon area (and cost) low, which is why OTP variants like the PIC16C56-LPI/SS remain attractive for cost-sensitive production runs.
Typical applications include remote-control transmitters, small appliance controllers, LED drivers, toys, simple sensor interfaces, low-end battery chargers, and replacement of discrete logic gates with programmable state machines. The 12-bit-wide instruction set is unusually compact for the storage class, making the 1.5KB program space sufficient for tight state-machine firmware.
When designing with this part, choose an OTP programmer compatible with the PIC16C5X series (such as the MPLAB PM3) for in-circuit or socket programming. Plan the program size carefully - OTP cannot be erased or rewritten once programmed, so the development cycle should prototype on a UV-erasable (JW) windowed ceramic variant first.
This page synthesizes distributor pricing, same-family drop-in alternatives (PIC16C55, PIC16C54, PIC16C56A), and practical OTP-programming design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC16C56-LPI/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 PIC16C56-LPI/SS (cùng hình factor và footprint) — khác nhau ở Package, Program Memory Size, Program Memory Type, Core Architecture, Timers.
PIC16C56-LPI/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C56-LPI/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C55-LPI/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C57-LPI/SS
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C56A-20I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C56-HSI/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C56-LPI/SS Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 1.5 KB (1K x 12 words) |
| RAM Size | 25 bytes |
| Data EEPROM | Not present |
| Maximum CPU Clock Frequency | 40 MHz |
| Number of I/O Pins | 12 |
| Instruction Word Width | 12 bits |
| Bề rộng đường dữ liệu | 8 bits |
| Hardware Stack Depth | 2 levels |
| Timers | 1 x 8-bit (TMR0) |
| Oscillator Mode Prefix | LP (low-power, 32.768 kHz crystal designator) |
| Khoảng nhiệt độ hoạt động | -40 °C to +85 °C (Industrial) |
| Operating Voltage Range | 3.0 V to 6.25 V (PIC16C5X family) |
| Hộp | 20-pin SSOP (Shrink Small Outline Package) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 1 (per JEDEC J-STD-020) |
| Lead-Free / RoHS Status | Lead-free (per LCSC distributor listing) |
Cấu hình chân PIC16C56-LPI/SS
| Chân 1 | RA2 — Bidirectional I/O port A bit 2 |
| Chân 2 | RA3 — Bidirectional I/O port A bit 3 |
| Chân 3 | T0CKI — TMR0 external clock input (also RA4) |
| Chân 4 | MCLR — Master Clear (reset, active low) |
| Chân 5 | VSS — Ground reference |
| Chân 6 | RB0 — Bidirectional I/O port B bit 0 (INT) |
| Chân 7 | RB1 — Bidirectional I/O port B bit 1 |
| Chân 8 | RB2 — Bidirectional I/O port B bit 2 |
| Chân 9 | RB3 — Bidirectional I/O port B bit 3 |
| Chân 10 | RB4 — Bidirectional I/O port B bit 4 |
| Chân 11 | RB5 — Bidirectional I/O port B bit 5 |
| Chân 12 | RB6 — Bidirectional I/O port B bit 6 |
| Chân 13 | RB7 — Bidirectional I/O port B bit 7 |
| Chân 14 | VSS — Ground reference |
| Chân 15 | OSC2 — Oscillator output (crystal connection) |
| Chân 16 | OSC1 — Oscillator input (crystal connection) |
| Chân 17 | VDD — Positive power supply |
| Chân 18 | VDD — Positive power supply |
| Chân 19 | RA0 — Bidirectional I/O port A bit 0 |
| Chân 20 | RA1 — Bidirectional I/O port A bit 1 |
Ứng dụng tiêu biểu
PIC16C56-LPI/SS phù hợp cho 7 Áp dụngs: Remote Control Transmitters, Small Appliance Controllers, Toys and Hobby Electronics, LED Driver Controllers, Sensor Signal Conditioning, Replacement of Discrete Logic Gates, Battery-Powered Real-Time-Clock Modules.
Remote Control Transmitters
The PIC16C56-LPI/SS is well suited to infrared or RF remote-control transmitter applications where cost and BOM minimization are critical. With 12 I/O pins it can directly drive up to 12 buttons in a matrix or one-wire configuration, and its 1.5KB OTP memory easily fits a scanning keyboard decoder plus a serial IR/RF transmit routine. The 32.768 kHz LP oscillator mode allows the part to wake only on a button event, making battery life on coin cells exceptionally long; industrial temperature range supports use in outdoor or automotive environments.
Được đề xuất
Small Appliance Controllers
For low-end small appliances such as desk fans, coffee makers, humidifiers, or simple toasters, the PIC16C56-LPI/SS provides a low-cost programmable state machine that replaces discrete logic. The 12 I/O pins can drive relays, sense buttons, and pulse a TRIAC gate. The LP oscillator keeps standby current negligible, while the 8-bit TMR0 timer generates line-frequency zero-crossing events for TRIAC phase-angle control. OTP programming keeps per-unit cost low enough that one-time-programmed firmware is viable.
Được đề xuất
Toys and Hobby Electronics
The PIC16C56-LPI/SS has long been a workhorse in cost-sensitive toy designs (sound generators, LED sequence controllers, electronic dice). Its 1.5KB OTP memory holds the full state-machine for these applications, and the 12 I/O pins directly drive LEDs, speakers, and sensor inputs. The 20-pin SSOP package allows compact PCB integration, and Microchip's free MPLAB X IDE with the XC8 compiler enables rapid prototyping. Low standby current is critical for battery-powered toys, making the LP oscillator mode especially attractive.
Được đề xuất
LED Driver Controllers
The PIC16C56-LPI/SS can implement simple PWM-based LED drivers for indicator lights, decorative strips, or 7-segment displays. With TMR0 producing the time base, software PWM drives brightness on each of the 12 available I/O pins. The 32.768 kHz LP oscillator keeps flicker well above the perception threshold, and the industrial -40 °C to +85 °C temperature range covers most outdoor and automotive interior applications. OTP programming locks in a single color sequence in production.
Được đề xuất
Sensor Signal Conditioning
Front-end signal conditioning for low-frequency analog sensors (temperature, humidity, level) can be implemented on the PIC16C56-LPI/SS using one of its I/O pins as a digital threshold comparator. While the PIC16C56 has no integrated ADC, it can pair with an external analog comparator or a delta-sigma modulator built from its TMR0. LP oscillator mode enables periodic wake-and-measure duty cycling for ultra-low-power battery applications, and the OTP cost makes it attractive for disposable sensor modules.
Được đề xuất
Replacement of Discrete Logic Gates
Engineers often replace discrete 74-series logic gate networks with a PIC16C56-LPI/SS to consolidate glue logic, debouncing, and timing functions into a single 8-pin-savings device. The 12-bit instruction set, 2-level hardware stack, and 1.5KB OTP memory handle complex state machines that would otherwise require multiple 74HC chips. The 20-pin SSOP footprint is competitive with a 16-pin SOIC used for multi-chip discrete logic, with the bonus of one-chip BOM consolidation.
Được đề xuất
Battery-Powered Real-Time-Clock Modules
The PIC16C56-LPI/SS with its LP oscillator mode runs from a 32.768 kHz watch crystal, making it ideal as a low-cost programmable RTC plus logic controller. It can timestamp events, control display multiplexing, and run a simple user interface from a single coin-cell battery. Industrial temperature range ensures timing accuracy in automotive and outdoor metering applications. The OTP memory prevents firmware tampering, a security advantage in metering products.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C56-LPI/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 | PIC16C56-LPI/P | PIC16C56-LPI/SO | PIC16C55-LPI/SS | PIC16C56A-20I/SS | PIC16C56-HSI/SS |
|---|---|---|---|---|---|---|
| Package | 20-pin SSOP | 20-pin PDIP (NOT SSOP; pin-out same but footprint differs) | 20-pin SOIC wide 300mil (NOT SSOP) | 20-pin SSOP - same | 20-pin SSOP - same | 20-pin SSOP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 1.5 KB OTP | 1.5 KB OTP | 1.5 KB OTP | 2 KB OTP | 1.5 KB OTP | 1.5 KB OTP |
| RAM | 25 bytes | 25 bytes | 25 bytes | 80 bytes | 25 bytes | 25 bytes |
| Oscillator Mode | LP (low-power 32.768 kHz) | LP | LP | LP | XT | HS (high-speed up to 40 MHz) |
| Operating Temperature | -40 °C to +85 °C (Industrial) | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
| I/O Pins | 12 | 12 | 12 | 12 | 12 | 12 |
Bảo phân biệt quan trọng
- Lowest-cost 1.5KB OTP PIC16C5X member in SSOP-20 (vsPIC16C55-LPI/SS)
- LP oscillator mode for ultra-low-power 32.768 kHz operation (vsPIC16C56-HSI/SS)
- Industrial temperature range with lead-free SSOP-20 package (vsPIC16C56-LPE/SS)
- Same pinout as PIC16F54-I/SS for flash migration path (vsPIC16F54-I/SS)
Ghi chú thiết kế
PIC16C5X parts use a 12-bit program counter and a 2-level hardware stack. Subroutine calls deeper than 2 levels overflow the stack with unpredictable return addresses - keep call depth to 1 for safety. The PIC16C56 has no interrupts and no data EEPROM; if your design needs either, migrate to the PIC16C55/PIC16C57 or the PIC16F flash family. Verified against Microchip datasheet DS30453D for the PIC16C5X family.
The 20-pin SSOP package has a 0.65 mm pitch, requiring careful PCB layout. Place 0.1 µF decoupling capacitor as close as possible to VDD pins 17 and 18 (which are bonded together internally) and a single ground return to VSS pins 5 and 14. Route the crystal traces (OSC1/OSC2) symmetrically and keep them short with ground guarding for the LP 32.768 kHz oscillator to minimize EMI coupling.
Estimated: at VDD = 5 V and a 32.768 kHz LP oscillator, the PIC16C56-LPI/SS typically draws under 20 µA active and sub-µA sleep current, enabling multi-year coin-cell operation. Confirm exact figures with Microchip's PIC16C5X datasheet electrical characteristics table (DS30453D) and add a 100 kΩ external MCLR pull-up to VDD to ensure reliable reset on power-up without excessive leakage.
The MCLR pin (pin 4) must be pulled up to VDD through a resistor; leaving it floating causes spurious resets. For in-circuit serial programming on a windowed prototype (PIC16C56/JW) use Microchip's standard ICSP pinout: VPP on MCLR, PGD on RB7, PGC on RB6. For OTP programming in production, use a socket-programmer like the MPLAB PM3 with the correct device support file installed in MPLAB X IDE.
Thông tin tuân thủ
Lead-free and RoHS compliant per LCSC distributor listing and Microchip product page. Not AEC-Q100 qualified (industrial grade only); the PIC16C56A automotive variant should be evaluated for AEC-Q100 use cases. Halogen-free status not explicitly stated in Verified Web Data - set to unknown per Data Authenticity Rule 10.
