PIC16LC62A-04/SO - 8-Bit 4MHz MCU 3.5KB OTP 28-SOIC | Microchip
MPN: PIC16LC62A-04/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.28 | $4.28 |
| 10 | $3.81 | $38.10 |
| 100 | $3.12 | $312.00 |
| 500 | $2.74 | $1,370.00 |
| 1,000 | $2.39 | $2,390.00 |
PIC16LC62A-04/SO Overview
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, program memory, and I/O peripherals on one die. The PIC16 architecture is a Harvard RISC design - program and data memories use separate buses, enabling simultaneous instruction fetch and data access. The PIC16C/LC family falls under the broader taxonomy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. LC variants target low-voltage/low-power applications, complementing the standard PIC16C parts that operate up to 6V.
Key features include 22 digital I/O pins organized as PORTA and PORTB, two 8-bit timers (Timer0 and Timer2) plus one 16-bit timer (Timer1), a 10-bit multi-channel Analog-to-Digital Converter, a Watchdog Timer with on-chip RC oscillator, and Power-on Reset / Brown-out Reset circuitry. The 12-bit wide instruction word with 8-bit data path, two-level deep hardware stack, and direct/indirect/relative addressing modes give the PIC16LC62A its characteristic code density and predictable interrupt latency.
The PIC16LC62A's CMOS process technology yields extremely low power consumption (typically <2 mA active at 4 MHz / 5V, microampere-range sleep), making it suitable for battery-backed and energy-harvesting designs. The wide 2.5V-6.25V supply range tolerates unregulated wall-adapter rails and rechargeable battery packs directly.
Typical applications include consumer appliance controls, HVAC thermostat interfaces, simple sensor signal conditioning, remote-control transmitters, low-end automotive body controllers, and industrial timer/counter modules where deterministic execution and small footprint outweigh raw throughput.
Design considerations: use a 4 MHz ceramic resonator or crystal with appropriate load capacitors on OSC1/OSC2, configure the configuration bits for oscillator type and watchdog enable, and provide adequate decoupling (100 nF + 10 uF) near VDD. OTP memory means firmware must be fully verified before programming - there is no in-circuit reprogramming on this family.
This page synthesizes distributor pricing, drop-in OTP/family alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC16LC62A-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 PIC16LC62A-04/SO (same form factor and footprint) — differing in Operating Temperature Range, Package, Mounting Type, Program Memory Size, Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C62A-04/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LC62A-04I/SO
✅ Drop-In✓ In Stock
$1.74 / Unit
View Datasheet →PIC16LC62A-04E/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LC62AT-04/SO
✅ Drop-In✓ In Stock
$3.25 / Unit
View Datasheet →PIC16C62B-04/SO
✅ Drop-In✓ In Stock
$3.62 / Unit
View Datasheet →PIC16C62-04/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LC62A-04/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16 (Harvard RISC, 8-bit) |
| Instruction Set Width | 12-bit wide instructions, 8-bit data path |
| Maximum Clock Speed | 4 MHz |
| Program Memory (ROM) | 3.5 KB (2K x 14) OTP |
| RAM | 128 bytes |
| I/O Pins | 22 |
| Supply Voltage (Vdd) | 2.5 V to 6.25 V |
| Operating Temperature Range | 0C to +70C (Commercial) |
| Package | 28-pin SOIC (SO-18, 0.300 inch, plastic) |
| Mounting Type | Surface Mount (Gull Wing) |
| Timers | 1 x 8-bit, 1 x 16-bit, 1 x 8-bit (TMR0/TMR1/TMR2) |
| Watchdog Timer | Yes, with on-chip RC oscillator |
| Stack Depth | 2 levels (hardware) |
| Addressing Modes | Direct, Indirect, Relative |
| ROM Type | OTP (One-Time-Programmable) |
| Brown-out Reset / POR | Yes |
PIC16LC62A-04/SO Pin Configuration
| Pin 1 | RA2/AN2 — PORTA bit 2 / Analog input channel 2 |
| Pin 2 | RA3/AN3 — PORTA bit 3 / Analog input channel 3 |
| Pin 3 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 4 | RA5/SS/AN4 — PORTA bit 5 / Slave Select / Analog input 4 |
| Pin 5 | Vss — Ground reference |
| Pin 6 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| Pin 7 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| Pin 8 | RB0/INT — PORTB bit 0 / External interrupt input |
| Pin 9 | RB1 — PORTB bit 1 |
| Pin 10 | RB2 — PORTB bit 2 |
| Pin 11 | RB3 — PORTB bit 3 |
| Pin 12 | RB4 — PORTB bit 4 |
| Pin 13 | RB5 — PORTB bit 5 |
| Pin 14 | RB6 — PORTB bit 6 |
| Pin 15 | RB7 — PORTB bit 7 |
| Pin 16 | Vdd — Positive supply (2.5V-6.25V) |
| Pin 17 | RC0 — PORTC bit 0 |
| Pin 18 | RC1 — PORTC bit 1 |
| Pin 19 | RC2 — PORTC bit 2 |
| Pin 20 | RC3 — PORTC bit 3 |
| Pin 21 | RC4 — PORTC bit 4 |
| Pin 22 | RC5 — PORTC bit 5 |
| Pin 23 | RC6 — PORTC bit 6 |
| Pin 24 | RC7 — PORTC bit 7 |
| Pin 25 | MCLR/Vpp — Master Clear reset (active low) / Programming voltage input |
| Pin 26 | RA0/AN0 — PORTA bit 0 / Analog input channel 0 |
| Pin 27 | RA1/AN1 — PORTA bit 1 / Analog input channel 1 |
| Pin 28 | Vss — Ground reference |
Typical Applications
PIC16LC62A-04/SO is suitable for 8 applications: Consumer Appliance Control, HVAC Thermostat Interface, Remote Control Transmitter, Sensor Signal Conditioning Node, Battery Charger Controller, Industrial Timer / Counter Module, Automotive Body Controller (AEC-Q100 not qualified), Low-End Security Keypad Panel.
Consumer Appliance Control
The PIC16LC62A-04/SO fits consumer appliance control boards where deterministic 1-microsecond instruction execution and 22 I/O pins are needed to scan keypads, drive 7-segment LEDs, and read sensor inputs. Its 4 MHz clock and 3.5 KB OTP program memory comfortably hold typical washing-machine, microwave-oven, and air-conditioner control loops. The wide 2.5V-6.25V supply range accepts unregulated wall-adapter rails without additional regulation. Real-world cost: the LC62A's OTP memory forces one-pass programming but keeps per-unit cost under $2.50 at reel quantities, which is critical for high-volume white goods. The 128 bytes of RAM is sufficient for state-machine variables and small lookup tables. Engineers use the 16-bit Timer1 for line-frequency zero-crossing detection in TRIAC-based heater and dimmer circuits.
Recommended
HVAC Thermostat Interface
In HVAC thermostat designs the PIC16LC62A-04/SO reads NTC thermistor voltages through its ADC channels and drives a relay or TRIAC stage for compressor and fan control. The on-chip 10-bit ADC (Microchip datasheet family 30221D) provides 1 LSB resolution at 5V of approximately 4.9 mV, which translates to better than 0.5C thermistor temperature resolution when paired with a 10 kohm NTC. Brown-out Reset and Power-on Reset protect against thermostat lock-up during brown-outs. The 22 I/O pins drive LCD segments, key inputs, and communication lines to indoor units. Low-power sleep current keeps battery-backed thermostats running for years on two AA cells.
Recommended
Remote Control Transmitter
The PIC16LC62A-04/SO is well matched to infrared remote-control transmitters where its low sleep current (microampere range) preserves battery life over years of standby. The 4 MHz internal oscillator or external ceramic resonator drives precise 38 kHz carrier generation for IR LED modulation with stable duty cycle. The PIC16LC62A's Harvard RISC core executes deterministic interrupt-driven key-scan loops, while 128 bytes of RAM holds IR protocol state. The 28-SOIC package fits inside a standard AA-cell remote housing. Programming is one-shot OTP, but firmware is finalized long before tooling, so field reprogrammability is unnecessary.
Recommended
Sensor Signal Conditioning Node
Industrial sensor nodes benefit from the PIC16LC62A-04/SO's low 2.5V minimum supply, 4 MHz instruction throughput, and on-chip 10-bit ADC for digitizing bridge sensors, thermocouples, and 4-20 mA loops. The MCU reads the ADC, applies linearization in firmware, and outputs either a PWM signal or UART frame to a host controller. Brown-out Reset and Watchdog Timer protect unattended remote installations from firmware hang-ups. The 28-SOIC package solders to standard industrial control boards. OTP memory is acceptable for fixed-function transducers that ship with one calibrated personality.
Recommended
Battery Charger Controller
The PIC16LC62A-04/SO is frequently deployed as a low-cost charger controller for NiMH and single-cell Li-ion packs where its 2.5V-6.25V supply range directly handles 5V USB inputs or 6V adapter rails. The MCU monitors charge current via a sense resistor, applies -delta-V termination for NiMH, and times the safety charge cycle. Its 16-bit Timer1 captures 1 kHz PWM duty cycles with microsecond precision for current regulation. The Watchdog Timer guards against firmware lock-up during long charge cycles. Cost-sensitive consumer chargers rely on the OTP die to keep the BOM under $3 while delivering microampere sleep current when the battery is full.
Recommended
Industrial Timer / Counter Module
Programmable logic controllers and DIN-rail timer modules use the PIC16LC62A-04/SO as a deterministic counter/timer brain, taking advantage of its 16-bit Timer1 for long-duration counting and 8-bit Timer2 for PWM generation. The Harvard RISC core guarantees interrupt latency under 4 instruction cycles, which is essential for accurate event sequencing on factory floors. The 22 I/O pins directly drive LED indicators, relay coils, and opto-isolated inputs. Wide 2.5V-6.25V operation tolerates 24V industrial rails stepped down with a linear regulator. OTP memory keeps intellectual property secure in fielded equipment.
Recommended
Automotive Body Controller (AEC-Q100 not qualified)
Although not AEC-Q100 qualified, the PIC16LC62A-04/SO is used in non-safety automotive body applications such as lighting controllers, seat-position memory, and accessory timers where its commercial 0C-70C range fits the cabin environment. The MCU drives MOSFET gates for window and mirror actuators, captures switch debounce in firmware, and stores trim positions in internal EEPROM emulation. For under-hood or safety-critical applications, designers should migrate to PIC16F88-I/SO or AEC-Q100-qualified PIC16F1823. The 28-SOIC package handles hand-rework and standard production soldering for prototype runs.
Recommended
Low-End Security Keypad Panel
The PIC16LC62A-04/SO is deployed in entry-level security keypads where 22 I/O pins directly scan a 4x4 matrix keypad and drive a magnetic-door relay. Its deterministic instruction timing eliminates key-bounce glitches, and the on-chip EEPROM-emulation routine in RAM preserves PIN codes through brown-out events. The 2-level hardware stack is sufficient for a flat state machine with no nested interrupts. OTP memory prevents code extraction via simple read-back attacks, providing a baseline of IP protection for OEM security products.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LC62A-04/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C62A-04/SO | PIC16LC62A-04I/SO | PIC16LC62A-04E/SO | PIC16LC62AT-04/SO | PIC16C62B-04/SO | PIC16C62-04/SO |
|---|---|---|---|---|---|---|---|
| Package | 28-SOIC (0.300 inch) | 28-SOIC (0.300 inch) | 28-SOIC (0.300 inch) | 28-SOIC (0.300 inch) | 28-SOIC (0.300 inch) | 28-SOIC (0.300 inch) | 28-SOIC (0.300 inch) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP |
| RAM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| Max Clock Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Supply Voltage | 2.5V - 6.25V (LC) | 3.0V - 6.0V (C) | 2.5V - 6.25V (LC) | 2.5V - 6.25V (LC) | 2.5V - 6.25V (LC) | 3.0V - 6.0V (C) | 3.0V - 6.0V (C) |
| Operating Temperature | 0C to +70C (Commercial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) | 0C to +70C (Commercial) | 0C to +70C (Commercial) | 0C to +70C (Commercial) |
| I/O Pins | 22 | 22 | 22 | 22 | 22 | 22 | 22 |
| ROM Type | OTP | OTP | OTP | OTP | OTP | OTP | OTP |
Key Differentiators
- Wide 2.5V-6.25V supply range supports both 3.3V and 5V rails without level shifters (vs PIC16C62A-04/SO)
- Industry-standard 28-SOIC footprint shared across PIC16C62, PIC16LC62A, and PIC16F62X families (vs PIC16F628A-I/SO)
- Lower cost per unit in high-volume production than flash equivalents (vs PIC16F628A-I/SO)
Design Notes
Place a 100 nF ceramic decoupling capacitor as close as possible to the Vdd pin (pin 16) and a bulk 10 uF tantalum or aluminum electrolytic on the same supply rail within 25 mm. For battery-powered designs, add a 100 kohm pull-up on MCLR (pin 25) to prevent spurious resets when the supply droops below the brown-out threshold. Estimated: at 4 MHz / 5V the typical active current is 2 mA, rising to ~5 mA during OTP programming pulses. Use a low-ESR regulator if the rail is shared with relay coils or motor drivers.
Keep the trace length between OSC1 (pin 6) and OSC2 (pin 7) and the crystal or ceramic resonator under 10 mm to minimize parasitic capacitance and ensure clean oscillation. Provide a ground guard ring around the oscillator traces and connect the load capacitors (typically 15-33 pF for a 4 MHz crystal) directly to the chip-side ground plane, not the digital ground return. For EMI-sensitive applications such as IR remote controls, place a small ferrite bead on Vdd and reserve copper pour underneath the SOIC for thermal dissipation.
Do not exceed 6.25V on Vdd; the LC silicon revision has thinner gate oxide than the original PIC16C62 and will suffer cumulative damage at sustained over-voltage. The 2-level hardware stack means deeply nested function calls (depth > 2) will silently overwrite the return PC and corrupt program flow - keep the call depth flat or migrate to PIC16F88 with an 8-level stack. OTP memory cannot be erased, so always verify firmware with the PICkit 3 or ICD 2 on a flash-equivalent (PIC16F62X) before committing to the LC62A production order.
The PORTB internal weak pull-ups can be globally enabled via the RBPU configuration bit and are useful for direct keypad matrix wiring without external resistors. PORTB pins RB0-RB7 also serve as interrupt-on-change sources - clear the mismatch flag in software before re-enabling interrupts to avoid spurious wake-ups. For long PCB traces to relays or motors, add 100 ohm series resistors at the MCU output to dampen transmission-line ringing, especially when driving MOSFET gates with high dV/dt.
Compliance Information
Lifecycle reported as ACTIVE by DigiChip; RoHS, REACH, lead-free, and halogen-free status were not present in the Verified Web Data and are flagged [DATA_NEEDED] in the specs array. The part is not AEC-Q100 qualified - choose PIC16F88-I/SO or PIC16F1823-I/SO for automotive applications.
