PIC16LC56A-04I/P - 8-Bit 1.5KB OTP MCU, 4MHz, 18-PDIP | Microchip
MPN: PIC16LC56A-04I/P ✓ פעילPIC16LC56A-04I/P סקירה
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and peripheral I/O onto one silicon die. The PIC16C5X family specifically implements a RISC architecture with 33 single-word, single-cycle instructions, providing 2:1 code compression versus competitors in its class. MCUs form the lowest level of the embedded computing hierarchy: microcontroller -> embedded processor -> SoC -> computer. The 'LC' suffix designates the low-power CMOS process variant; the 'A' suffix denotes an enhanced silicon revision with improved oscillator stability and lower current consumption.
Key differentiating features include 12 I/O pins with individually programmable direction, an 8-bit real-time timer/counter (TMR0) with 8-bit programmable prescaler, a watchdog timer for code-lock recovery, and power-saving SLEEP mode. The OTP EPROM allows factory or prototype programming in plastic packages. The 4 MHz clock enables deterministic instruction execution at 1 us per instruction cycle, simplifying real-time control loops.
Typical applications include industrial control, embedded automation, motor control (small DC/Stepper drivers), metering (utility, energy, water), low-power IoT end-node sensor reading, and legacy board redesigns. The 18-pin PDIP package remains popular for hobby, education, and through-hole assembly lines.
Designers should note that the OTP memory cannot be reprogrammed; for field updates choose the PIC16F56A flash variant. For new designs requiring C compiler support and modern peripherals, the PIC16F1xxx family offers migration paths in the same 18-pin DIP package.
This page synthesizes distributor pricing, pin-compatible alternatives, and practical design notes beyond the manufacturer datasheet summary.
חלופות תחליף ישיר עבור PIC16LC56A-04I/P — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם PIC16LC56A-04I/P (אותו גורם צורה וטביעת רגל) — שונים ב Package, Timers, I/O Pins, Program Memory Type, Watchdog Timer.
PIC16C56A-04I/P
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC16F56A-I/P
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
PIC16C56-04I/P
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
PIC16LC54A-04I/P
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
PIC16CR56A-04I/P
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
PIC16LC56A-04I/P דירוגים מרביים ומאפיינים חשמליים
| Product Type | 8-bit Microcontroller (MCU) |
| Architecture | PIC RISC (PIC16C5X family) |
| Program Memory | 1.5 KB OTP EPROM |
| RAM | 25 bytes |
| Maximum Clock Speed | 4 MHz |
| Instruction Set | 33 single-word, single-cycle instructions |
| I/O Pins | 12 |
| Supply Voltage (Vdd) | 3.0 V to 6.25 V |
| טמפרטורת פעולה | -40 C to +85 C (Industrial) |
| מארז | 18-pin PDIP (0.300 inch, 7.62 mm) |
| סוג הרכבה | Through-Hole |
| Timer/Counters | 1 x 8-bit (TMR0) with 8-bit prescaler |
| Watchdog Timer | Yes (with on-chip RC oscillator) |
| Program Memory Type | OTP EPROM (one-time programmable) |
| סטטוס RoHS | Compliant (Pb-free) |
| רמת MSL | Not applicable (through-hole package) |
תצורת פינים של PIC16LC56A-04I/P
| פין 1 | RA2 — GPIO Port A bit 2 |
| פין 2 | RA3 — GPIO Port A bit 3 |
| פין 3 | RA4/T0CKI — GPIO Port A bit 4 / Timer0 clock input |
| פין 4 | MCLR — Master Clear Reset input (active low) |
| פין 5 | VSS — Ground reference |
| פין 6 | RB0 — GPIO Port B bit 0 |
| פין 7 | RB1 — GPIO Port B bit 1 |
| פין 8 | RB2 — GPIO Port B bit 2 |
| פין 9 | RB3 — GPIO Port B bit 3 |
| פין 10 | RB4 — GPIO Port B bit 4 |
| פין 11 | RB5 — GPIO Port B bit 5 |
| פין 12 | RB6 — GPIO Port B bit 6 |
| פין 13 | RB7 — GPIO Port B bit 7 |
| פין 14 | VDD — Positive supply voltage (3.0V to 6.25V) |
| פין 15 | OSC2 — Oscillator output (crystal/RC) |
| פין 16 | OSC1 — Oscillator input (crystal/RC/external clock) |
| פין 17 | RA0 — GPIO Port A bit 0 |
| פין 18 | RA1 — GPIO Port A bit 1 |
יישומים טיפוסיים
PIC16LC56A-04I/P מתאים עבור 7 יישוםs: Industrial Control and Automation, Motor Control (Small DC / Stepper), Utility Metering (Water / Gas / Energy), IoT Sensor End Nodes and Low-Power Devices, Consumer Appliance Control, Hobby, Education, and Legacy Board Redesign, Automotive Aftermarket and Subsystems.
Industrial Control and Automation
The PIC16LC56A-04I/P fits industrial control applications because of its 4 MHz deterministic instruction cycle (1 us per instruction), 12 GPIO for sensor and actuator interfacing, and -40 C to +85 C industrial temperature rating. According to PIC16C5X family documentation, the 33 single-cycle instruction RISC core enables real-time control loops with predictable timing - critical for PLC digital I/O modules, conveyor sequencing, and relay driver boards. The 3.0V-6.25V supply range supports both 24V-bus-derived 5V rails and 3.3V logic, making it a flexible slave controller.
מומלץ
Motor Control (Small DC / Stepper)
Small DC and stepper motor control applications benefit from the PIC16LC56A-04I/P's 12 GPIO sufficient to drive H-bridge logic inputs, direction, enable, and fault feedback lines for one or two small motors. According to Microchip application notes, the 4 MHz clock with 1 us instruction cycle provides adequate PWM edge timing for low-RPM brushed DC motors in appliances, fans, and pumps. The watchdog timer with on-chip RC oscillator ensures code-lock recovery in noisy motor environments, while industrial temperature grade supports under-hood-adjacent deployments.
מומלץ
Utility Metering (Water / Gas / Energy)
Utility metering endpoints leverage the PIC16LC56A-04I/P for low-power pulse counting, mechanical encoder reading, and tamper detection in electricity, water, and gas meters. According to PIC16C5X family datasheet, the SLEEP mode plus watchdog wake-up enables battery lifetimes of 5-10 years on a single lithium cell when the MCU sleeps between sensor pulses. The 1.5KB code space holds calibrated metering firmware, and the 25-byte RAM is sufficient for BCD counter accumulators. Industrial temperature rating tolerates outdoor meter enclosure conditions.
מומלץ
IoT Sensor End Nodes and Low-Power Devices
IoT sensor end nodes and low-power battery devices leverage the PIC16LC56A-04I/P's LC CMOS process for sub-microwatt SLEEP currents, allowing multi-year battery life on simple duty-cycled sensor nodes. According to Microchip low-power MCU documentation, the watchdog timer can wake the MCU from SLEEP every few seconds to read a temperature or humidity sensor and transmit via a companion radio. The 12 GPIO supports I2C bit-banged sensor interfaces, status LEDs, and a wake-up button. Wide 3.0-6.25V supply accepts 3.6V lithium thionyl chloride cells directly.
מומלץ
Consumer Appliance Control
Consumer appliance control boards - including coffee makers, microwave keypads, washing machine user interfaces, and air-conditioner remotes - use the PIC16LC56A-04I/P for keyboard scanning, LED/buzzer driving, and relay sequencing. According to the 33-instruction RISC architecture, the part's 12 GPIO easily handles 4x4 matrix keypads plus indicator LEDs, while the 1.5KB code holds state-machine firmware. The through-hole PDIP package simplifies hand-soldering and field repair on legacy appliance production lines where SMT equipment is not available.
מומלץ
Hobby, Education, and Legacy Board Redesign
Hobby, education, and legacy board redesign projects benefit from the PIC16LC56A-04I/P's through-hole 18-pin PDIP package, breadboard-friendly footprint, and the well-documented PIC16C5X instruction set taught in many university embedded courses. According to PIC16C5X educational documentation, students learn RISC assembly programming on this part before graduating to PIC16F1xxx. Legacy redesigns of 1990s-era PIC16C5X-based products can use PIC16LC56A-04I/P as a form-fit-function replacement with identical 18-pin DIP footprint, requiring no PCB changes.
מומלץ
Automotive Aftermarket and Subsystems
Automotive aftermarket and subsystem applications such as alarm LED flashers, garage door openers, and 12V accessory controllers leverage the PIC16LC56A-04I/P's 6.25V absolute-maximum Vdd (with external regulator) and industrial -40 C to +85 C temperature range. According to automotive electronics guidance, the part is suitable for non-safety in-cabin accessories that do not require AEC-Q100 qualification. For under-hood or safety-critical functions, select the AEC-Q100-qualified PIC16C5X automotive variants or migrate to a PIC16F1xxx Q1 part.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור PIC16LC56A-04I/P — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | PIC16C56A-04I/P | PIC16F56A-I/P | PIC16C56-04I/P | PIC16LC54A-04I/P | PIC16CR56A-04I/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-PDIP (0.300 inch) | 18-PDIP - same | 18-PDIP - same | 18-PDIP - same | 18-PDIP - same | 18-PDIP - same |
| Program Memory | 1.5 KB OTP EPROM | 1 KB OTP EPROM | 1.5 KB Flash | 1 KB OTP EPROM | 512 B OTP EPROM | 1.5 KB Mask ROM |
| Maximum Clock Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| RAM | 25 bytes | 25 bytes | 25 bytes | 25 bytes | 25 bytes | 25 bytes |
| I/O Pins | 12 | 12 | 12 | 12 | 12 | 12 |
| Supply Voltage Range | 3.0 V to 6.25 V | 3.0 V to 6.25 V | 2.0 V to 5.5 V | 3.0 V to 6.25 V | 3.0 V to 6.25 V | 3.0 V to 6.25 V |
| Memory Type | OTP EPROM (one-time) | OTP EPROM | Flash (reprogrammable) | OTP EPROM | OTP EPROM | Mask ROM |
מבדילים עיקריים
- Lower minimum supply voltage than non-LC siblings (לעומתPIC16C56A-04I/P)
- Reprogrammable flash variant available in same footprint (לעומתPIC16F56A-I/P)
- Larger 1.5 KB code space than smaller PIC16LC54A variant (לעומתPIC16LC54A-04I/P)
הערות תכנון
The PIC16LC56A-04I/P 'LC' CMOS process supports 3.0 V to 6.25 V operation, enabling direct 3.3 V or 5 V supply without level shifters. According to PIC16C5X datasheet, the part draws approximately 1-2 mA active at 4 MHz and under 1 uA in SLEEP mode. Add a 100 nF decoupling capacitor directly between VDD (pin 14) and VSS (pin 5), placed within 5 mm of the package leads, to suppress switching noise from internal clock trees.
Do not attempt to erase or reprogram OTP EPROM - it is one-time programmable only. According to Microchip programming documentation, attempting UV erase on the windowed CERDIP variant does NOT apply to the PDIP package; the OTP bits are physically blown during programming. For prototype iteration, use the PIC16F56A-I/P flash variant in the same 18-PDIP footprint instead. Also note that PIC16C5X has no hardware stack - nested subroutines deeper than 2 levels will silently corrupt the program counter.
Place the 4 MHz crystal or ceramic resonator (with load capacitors per resonator datasheet, typically 15-33 pF) within 10 mm of OSC1 (pin 16) and OSC2 (pin 15). According to PIC16C5X oscillator guidance, keep oscillator traces short and shield them with a ground pour to prevent digital switching noise from coupling into the clock. For cost-sensitive designs, the internal RC oscillator mode eliminates the crystal entirely but adds +/- 1% frequency tolerance over temperature.
מידע על תאימות
RoHS compliant Pb-free PDIP per Microchip product environmental compliance. Not AEC-Q100 qualified - not suitable for automotive safety-critical applications. Halogen-free status not explicitly stated in the verified web data.
