PIC16LC56A-04I/SS - 4MHz 8-bit OTP MCU, 1.5KB | Microchip
MPN: PIC16LC56A-04I/SS ✓ فعالPIC16LC56A-04I/SS جائزہ
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.
کے لیے ڈراپ اِن متبادل PIC16LC56A-04I/SS — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں PIC16LC56A-04I/SS (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Program Memory Size, Package, Operating Temperature, I/O Pins, RAM Size.
PIC16LC56AT-04I/SS
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16LC56A-04/SS
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16LC558-04I/SS
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16LC54A-04I/SS
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
PIC16LC56A-04I/SS زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| 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 |
| زیادہ سے زیادہ کلاک فریکوئنسی | 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 |
| پیکیج | 20-pin SSOP (0.209", 5.30 mm width) |
| آپریٹنگ درجہ حرارت | -40 C to +85 C (Industrial, "I") |
| ماؤنٹنگ ٹائپ | Surface Mount |
PIC16LC56A-04I/SS پن کنفیگریشن
| پن 1 | RA3 — Bidirectional I/O pin, PORTA bit 3 |
| پن 2 | RA2 — Bidirectional I/O pin, PORTA bit 2 |
| پن 3 | RA1 — Bidirectional I/O pin, PORTA bit 1 |
| پن 4 | RA0 — Bidirectional I/O pin, PORTA bit 0 |
| پن 5 | OSC1/CLKIN — Oscillator input / external clock input |
| پن 6 | OSC2/CLKOUT — Oscillator output / clock output (crystal mode) |
| پن 7 | RC0 — Bidirectional I/O pin, PORTC bit 0 |
| پن 8 | RC1 — Bidirectional I/O pin, PORTC bit 1 |
| پن 9 | RC2 — Bidirectional I/O pin, PORTC bit 2 |
| پن 10 | RC3 — Bidirectional I/O pin, PORTC bit 3 |
| پن 11 | VSS — Ground reference |
| پن 12 | T0CKI — Timer0 clock input (also RB0) |
| پن 13 | RB0 — Bidirectional I/O pin, PORTB bit 0 (shared with T0CKI) |
| پن 14 | RB1 — Bidirectional I/O pin, PORTB bit 1 |
| پن 15 | RB2 — Bidirectional I/O pin, PORTB bit 2 |
| پن 16 | RB3 — Bidirectional I/O pin, PORTB bit 3 |
| پن 17 | RB4 — Bidirectional I/O pin, PORTB bit 4 |
| پن 18 | RB5 — Bidirectional I/O pin, PORTB bit 5 |
| پن 19 | RB6 — Bidirectional I/O pin, PORTB bit 6 |
| پن 20 | RB7 — Bidirectional I/O pin, PORTB bit 7 |
عام استعمالات
PIC16LC56A-04I/SS کے لیے موزوں ہے 7 ایپلیکیشنs: 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.
تجویز کردہ
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.
تجویز کردہ
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.
تجویز کردہ
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.
تجویز کردہ
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.
تجویز کردہ
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.
تجویز کردہ
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.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا PIC16LC56A-04I/SS — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | 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 |
اہم امتیازی خصوصیات
- Lowest-cost Microchip OTP MCU in the SSOP-20 footprint (بمقابلہPIC16F15344T-I/SS)
- Industrial-temperature grade in a 20-pin SSOP (بمقابلہPIC16LC56A-04/SS)
- Compact 20-pin SSOP for surface-mount assembly (بمقابلہPIC16LC56A-04I/P)
ڈیزائن نوٹس
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.
تعمیل کی معلومات
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.
