PIC16LC711-04/SO - 8-bit 4MHz OTP MCU with ADC | Microchip
MPN: PIC16LC711-04/SO ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.95 | $2.95 |
| 10 | $2.66 | $26.60 |
| 100 | $2.36 | $236.00 |
| 500 | $2.1 | $1,050.00 |
| 1,000 | $1.85 | $1,850.00 |
PIC16LC711-04/SO Overview
An 8-bit microcontroller (MCU) is a single-chip processor that executes instructions on 8-bit data paths and is widely used in embedded control applications where deterministic timing and low power are critical. MCUs sit within the broader category of microcontrollers -> embedded processors -> digital ICs -> semiconductors, and the PIC16C7XX family occupies a long-standing position in cost-sensitive industrial and consumer designs. The PIC16LC711 adds an integrated analog-to-digital converter, placing it within the ADC-equipped PIC mid-range tier.
Key features include 4 MHz maximum clock, 35 single-word instructions, 200 ns instruction cycle, 8-bit successive-approximation ADC with up to 4 input channels, 68 bytes RAM, four interrupt sources, and an 8-bit watchdog timer. The OTP program memory allows one-time field programming, which is well suited to low- and medium-volume production. The 18-SOIC surface-mount package supports automated assembly and standard reflow soldering.
The PIC16LC711 uses a Harvard-architecture RISC core with a 14-bit instruction word and separate program/data buses, allowing instruction fetch and operand access in a single cycle. The ADC subsystem includes a sample-and-hold and selectable acquisition timing, while an on-chip RC oscillator option reduces external component count. The architecture emphasizes deterministic interrupt response, making the part suitable for closed-loop control where predictable timing is required.
Typical applications include appliance control, sensor signal conditioning, simple motor control loops, low-cost data acquisition modules, and educational/development platforms. It is also widely used as a pin-compatible substitute within the PIC16C71X family for designs requiring ADC + small package + commercial temperature grade.
When designing with the PIC16LC711-04/SO, note that the OTP memory cannot be reprogrammed in-circuit; use a windowed (JW) variant for prototyping and the OTP for production. Adequate decoupling (100 nF + 10 uF) near VDD is essential because the analog reference is sensitive to supply noise, which directly impacts ADC accuracy.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes that are not aggregated in a single place on the manufacturer datasheet.
Drop-in alternatives for PIC16LC711-04/SO — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC16LC711-04/SO (same form factor and footprint) — differing in Package, Timers, ADC, Operating Temperature, RAM Size.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LC711T-04/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C711-04/SO
✅ Drop-In✓ In Stock
$3.32 / Unit
View Datasheet →PIC16C711-04E/SO
✅ Drop-In✓ In Stock
$1.71 / Unit
View Datasheet →PIC16LC711-04I/SO
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$3.78 / Unit
View Datasheet →PIC16LC71-04/SO
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →PIC16LC711-04/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC |
| Family | PIC16C71X |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 1.75 KB (1K x 14) |
| RAM | 68 bytes |
| Data EEPROM | None |
| Maximum CPU Speed | 4 MHz |
| Instruction Cycle | 200 ns |
| Number of I/O Pins | 13 |
| ADC | 8-bit, up to 4 channels |
| Timers | 8-bit Timer0 + WDT |
| Instruction Set Size | 35 single-word instructions |
| Interrupt Sources | 4 |
| Supply Voltage (Vdd) | 2.5 V to 6.0 V (LC variant, per datasheet) |
| Operating Temperature | 0 C to +70 C (commercial) |
| Package | 18-SOIC (SO), 300 mil |
| Mounting Type | Surface Mount |
| Lead-Free / RoHS | RoHS compliant per distributor listings |
PIC16LC711-04/SO Pin Configuration
| Pin 1 | RA2/AN2 — Bidirectional I/O / analog channel 2 |
| Pin 2 | RA3/AN3/VREF+ — Bidirectional I/O / analog channel 3 / ADC reference plus |
| Pin 3 | RA4/T0CKI — Bidirectional I/O / Timer0 clock input |
| Pin 4 | MCLR — Master Clear reset input (active low) |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0/INT — Bidirectional I/O / external interrupt |
| Pin 7 | RB1 — Bidirectional I/O |
| Pin 8 | RB2 — Bidirectional I/O |
| Pin 9 | RB3 — Bidirectional I/O |
| Pin 10 | RB4 — Bidirectional I/O |
| Pin 11 | RB5 — Bidirectional I/O |
| Pin 12 | RB6 — Bidirectional I/O |
| Pin 13 | RB7 — Bidirectional I/O |
| Pin 14 | VSS — Ground reference (second pin on SOIC) |
| Pin 15 | RC0 — Bidirectional I/O (or analog on PIC16C711) |
| Pin 16 | RC1 — Bidirectional I/O |
| Pin 17 | RC2/CCP1 — Bidirectional I/O / Capture-Compare-PWM |
| Pin 18 | RC3 — Bidirectional I/O |
Typical Applications
PIC16LC711-04/SO is suitable for 6 applications: Appliance Control Boards, Low-Cost Data Acquisition Modules, Sensor Signal Conditioning, Simple Closed-Loop Motor Control, Educational and Development Platforms, Legacy Embedded Replacement.
Appliance Control Boards
The PIC16LC711-04/SO fits appliance control boards because its 8-bit ADC directly reads sensor signals, the 13 I/O pins drive relays and triacs, and the OTP memory locks the firmware at production. Its 200 ns deterministic instruction cycle simplifies the state-machine code used in washer/dryer timers, microwave ovens, and HVAC damper controllers. The 18-SOIC package is reflow-solderable for high-volume assembly lines. Compared with a flash PIC, OTP cost-per-unit is lower for a fixed firmware release, which suits appliance OEMs shipping tens of thousands of units annually.
Recommended
Low-Cost Data Acquisition Modules
The PIC16LC711-04/SO is well suited to low-cost multi-channel data acquisition because its 8-bit ADC with up to 4 input channels delivers adequate resolution for slow-changing process signals. The 4 MHz clock and 200 ns instruction cycle permit sequential sampling at sub-kHz rates without DMA. Its 68-byte RAM holds a small sample buffer before UART transmission. The OTP architecture protects proprietary calibration coefficients from being read back, which is valuable in industrial sensor transmitters that must prevent firmware cloning.
Recommended
Sensor Signal Conditioning
The PIC16LC711-04/SO is ideal for sensor signal conditioning because the on-chip ADC digitizes analog sensor outputs and the deterministic RISC core runs linearization math in real time. Engineers commonly use it with thermistor, RTD, and bridge-sensor front-ends where the ADC reference and supply noise directly affect measurement accuracy. The OTP memory ensures that the calibration curve and compensation coefficients are baked in at production, removing the need for EEPROM. Its small 18-SOIC footprint allows the conditioning circuit to fit inside the sensor housing itself.
Recommended
Simple Closed-Loop Motor Control
The PIC16LC711-04/SO handles simple closed-loop motor control where the ADC reads back-EMF or current-sense signals and the firmware drives a TRIAC or H-bridge via GPIO. The deterministic 200 ns instruction cycle and four interrupt sources keep the commutation loop tight for low-RPM DC motors and small stepper drives. Its 13 I/O pins are sufficient for two H-bridge channels plus enable/fault lines. The OTP variant prevents field tampering with safety-critical motor parameters - useful in fan, pump, and valve controllers.
Recommended
Educational and Development Platforms
The PIC16LC711-04/SO is widely used in educational and development platforms because its 35-instruction RISC architecture is simple to teach, the OTP memory is forgiving for student lab exercises (every chip is fresh), and the 18-SOIC package is easy to breadboard with SOIC-to-DIP adapters. Many university microcontroller courses use the PIC16C71X family to teach ADC, timers, and interrupt programming without requiring an eraser/debugger. The Microchip MPASM and MPLAB IDE toolchain fully supports the part, giving students free access to industry-standard tooling.
Recommended
Legacy Embedded Replacement
The PIC16LC711-04/SO is commonly specified for legacy embedded replacement because the PIC16C71X pinout has been stable since the 1990s, allowing long-life industrial products to keep buying the same silicon. The OTP memory profile matches installed PIC16C711 boards that must be rebuilt to the original BOM. Microchip's NRND status means the part is winding down, so designers should plan a migration path to PIC16F716 - the flash-based, pin-compatible upgrade - while keeping PIC16LC711-04/SO available for spares and warranty repairs.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LC711-04/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LC711T-04/SO | PIC16C711-04/SO | PIC16C711-04E/SO | PIC16LC711-04I/SO | PIC16LC71-04/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-SOIC (SO) | 18-SOIC (SO) - same | 18-SOIC (SO) - same | 18-SOIC (SO) - same | 18-SOIC (SO) - same | 18-SOIC (SO) - same |
| Program Memory Type | OTP (1.75 KB) | OTP (1.75 KB) | OTP (1.75 KB) | OTP (1.75 KB) | OTP (1.75 KB) | OTP (1.75 KB) |
| CPU Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| ADC | 8-bit, 4 channels | 8-bit, 4 channels | 8-bit, 4 channels | 8-bit, 4 channels | 8-bit, 4 channels | No ADC |
| Temperature Range | 0 C to +70 C (commercial) | 0 C to +70 C | 0 C to +70 C | -40 C to +125 C (extended) | -40 C to +85 C (industrial) | 0 C to +70 C |
| Supply Voltage | 2.5 V to 6.0 V | 2.5 V to 6.0 V | 4.0 V to 6.0 V | 4.0 V to 6.0 V | 2.5 V to 6.0 V | 2.5 V to 6.0 V |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND | NRND |
Key Differentiators
- On-chip 8-bit ADC with four channels in 18-SOIC (vs PIC16LC71-04/SO)
- Wide-supply LC variant operates down to 2.5 V (vs PIC16C711-04/SO)
- Industrial-temperature sibling available in same footprint (vs PIC16C711-04E/SO)
Design Notes
Estimated: at 4 MHz and 5 V supply, the PIC16LC711-04/SO draws approximately 2 mA active and 1 uA sleep. Place a 100 nF ceramic decoupling capacitor within 5 mm of VDD (pin 17 in 18-SOIC) plus a 10 uF bulk capacitor on the supply rail. The ADC reference pin (RA3/VREF+) is highly noise-sensitive; if used, add a 10 uF + 100 nF capacitor stack directly at the pin and route VREF+ with a wide, short trace to avoid ADC accuracy loss.
Use a 4-layer PCB if the analog inputs are running close to switching nodes, with a dedicated ground plane under the MCU and a quiet analog ground island around VREF+/AVSS. Keep the MCLR pull-up (typically 10 kohm) close to pin 4 and route it away from RB7 to avoid spurious interrupts during in-circuit serial programming. The 18-SOIC land pattern matches the standard JEDEC SO-300 mil footprint, so most PIC development boards can be reused.
Do not assume the OTP device can be reprogrammed: every write cycle to program memory is final, and bad firmware requires a new chip. Always validate code on a windowed (JW) or flash PIC16F716 development part before committing to PIC16LC711-04/SO production. The 'LC' suffix denotes the wide-supply variant (2.5 V to 6.0 V); using the non-LC PIC16C711-04/SO at 3 V will cause ADC miscalibration. The four ADC channels (AN0-AN3) share pins with digital I/O, so the TRISA register must be reconfigured before each analog read.
Compliance Information
RoHS and lead-free status confirmed by DigiKey and Mouser listings (as of 2026-09-22). AEC-Q100 not applicable for general-purpose MCU. Halogen-free status not stated in distributor data - marked unknown.
