PIC16LC62B-04/SS - 4MHz 8-bit OTP MCU, 3.5KB EPROM | Microchip
MPN: PIC16LC62B-04/SS ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.45 | $5.45 |
| 10 | $5.05 | $50.50 |
| 100 | $4.45 | $445.00 |
| 500 | $3.95 | $1,975.00 |
| 1,000 | $3.55 | $3,550.00 |
PIC16LC62B-04/SS Overview
A PIC (Peripheral Interface Controller) microcontroller is a class of Harvard-architecture 8-bit RISC microprocessor designed for embedded control applications, integrating CPU core, program memory, RAM, timers, and peripherals on a single CMOS die. The PIC16 family occupies the Mid-Range position in Microchip's portfolio between baseline (PIC10/12/14) and Enhanced Mid-Range/PIC18 devices, optimized for low-cost, low-power applications requiring deterministic instruction timing. Mid-Range PICs share the 14-bit instruction word format that yields approximately 2:1 code density compared to 8-bit baseline cores.
Key features include a 4MHz maximum clock rate yielding 5 MIPS throughput, eight hardware interrupt sources, three timers (one 8-bit Timer0 with programmable prescaler, one 16-bit Timer1, and one 8-bit Timer2 with 8-bit period register), a 5-channel 8-bit analog-to-digital converter, synchronous serial port (SSP) supporting SPI and I2C master/slave modes, parallel slave port, and a watchdog timer with on-chip RC oscillator. The device operates across the industrial temperature range of -40C to +85C.
Architecturally, the PIC16LC62B-04 uses a 14-bit instruction word with a 2-stage pipeline, providing single-cycle execution except for program branches which require 2 cycles. The "-04" speed grade corresponds to a 4MHz external oscillator input; the slower -04 grade is pin-compatible with faster -20 and -10 grades within the same family. The OTP (One-Time Programmable) EPROM memory is windowless and cannot be erased, distinguishing this part from UV-erasable windowed counterparts and modern Flash-based PIC16F devices.
Typical applications include low-power industrial control nodes, white-goods appliance controllers, automotive body electronics (non-safety), security system keypads, sensor signal conditioning, IR remote control receivers, small-form-factor motor control (DC brushed and unipolar stepper), and consumer electronics user interfaces. The wide 2.5V-6.0V range supports battery-powered operation with single-cell lithium or two-cell alkaline supplies.
When designing with the PIC16LC62B-04/SS, consider migrating to the pin-compatible Flash-based PIC16F62X or PIC16F88X family for new designs since OTP parts carry higher per-unit programming cost and cannot be firmware-updated in the field. The 28-SSOP package is footprint-compatible with the PIC16F628, PIC16F88, and PIC16F1827 in the same SSOP-28 outline.
This page synthesizes distributor stock and pricing from DigiKey/Mouser/Octopart, identifies verified drop-in same-package alternatives within the Microchip PIC16 OTP family, and provides practical design notes covering the OTP-to-Flash migration path not found in the standalone manufacturer datasheet.
Drop-in alternatives for PIC16LC62B-04/SS — 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 PIC16LC62B-04/SS (same form factor and footprint) — differing in Package, Program Memory Size, Program Memory Type, RAM Size, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LC62B-04I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LC62B-04/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LC62BT-04/SS
✅ Drop-In✓ In Stock
$2.68 / Unit
View Datasheet →PIC16LC622-04/SS
✅ Drop-In✓ In Stock
$1.28 / Unit
View Datasheet →PIC16LC622T-04E/SS
✅ Drop-In✓ In Stock
$2.6 / Unit
View Datasheet →PIC16F628-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F88-I/SS
✅ Drop-In✓ In Stock
$3.08 / Unit
View Datasheet →PIC16LC62B-04/SS Maximum Ratings & Electrical Characteristics
| Product Family | PIC16C Mid-Range (14-bit instruction word) |
| Core | 8-bit RISC, 35 single-cycle instructions |
| Program Memory Type | OTP EPROM (windowless) |
| Program Memory Size | 3.5 KB (2K x 14) |
| Data Memory (RAM) | 128 x 8 bytes |
| Maximum Clock Frequency | 4 MHz |
| Instruction Cycle Time | 200 ns |
| Operating Voltage Range | 2.5 V to 6.0 V (LC low-voltage variant) |
| Number of I/O Pins | 22 |
| ADC | 5-channel, 8-bit (per Family reference, PIC16C62B variant dependent) |
| Timers | Timer0 (8-bit), Timer1 (16-bit), Timer2 (8-bit) |
| Communication Peripherals | SSP (SPI / I2C), Parallel Slave Port, USART (per datasheet family) |
| Oscillator Type | External (RC, XT, HS, LP modes via configuration bits) |
| Operating Temperature Range | 0C to +70C (commercial); -40C to +85C (industrial "I" suffix variant) |
| Package | 28-pin SSOP (5.30 mm body width, 0.65 mm pitch) |
| Mounting Type | Surface Mount |
PIC16LC62B-04/SS Pin Configuration
| Pin 1 | RA2/AN2 — PORTA bit 2 / Analog input channel 2 |
| Pin 2 | RA3/AN3/VREF — PORTA bit 3 / Analog input channel 3 / Voltage reference |
| Pin 3 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 4 | RA5/AN4/SS — PORTA bit 5 / Analog input channel 4 / SPI slave select |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0/INT — PORTB bit 0 / External interrupt input |
| Pin 7 | RB1 — PORTB bit 1 |
| Pin 8 | RB2 — PORTB bit 2 |
| Pin 9 | RB3/PGM — PORTB bit 3 / Low-voltage programming input |
| Pin 10 | RB4 — PORTB bit 4 |
| Pin 11 | RB5 — PORTB bit 5 |
| Pin 12 | RB6/PGC — PORTB bit 6 / ICSP clock input |
| Pin 13 | RB7/PGD — PORTB bit 7 / ICSP data input/output |
| Pin 14 | VSS — Ground reference (optional second VSS) |
| Pin 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 external clock |
| Pin 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 output |
| Pin 17 | RC2/CCP1 — PORTC bit 2 / CCP1 (Capture/Compare/PWM) output |
| Pin 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pin 19 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin 20 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 21 | RC6/TX/CK — PORTC bit 6 / USART asynchronous transmit / I2C clock (variant dependent) |
| Pin 22 | RC7/RX/DT — PORTC bit 7 / USART asynchronous receive / I2C data (variant dependent) |
| Pin 23 | VSS — Ground reference |
| Pin 24 | VDD — Positive supply voltage (2.5V to 6.0V) |
| Pin 25 | RA0/AN0 — PORTA bit 0 / Analog input channel 0 |
| Pin 26 | RA1/AN1 — PORTA bit 1 / Analog input channel 1 |
| Pin 27 | OSC2/CLKOUT — Oscillator output / Clock output (crystal mode) |
| Pin 28 | OSC1/CLKIN — Oscillator input / External clock input (4MHz max for this part) |
Typical Applications
PIC16LC62B-04/SS is suitable for 7 applications: White-Goods Appliance Controllers, Industrial Sensor Signal Conditioning Nodes, Automotive Body Electronics (Non-Safety), Security System Keypads and Annunciators, IR Remote Control Receiver MCUs, Small DC Motor and Stepper Control, Consumer Electronics User Interfaces.
White-Goods Appliance Controllers
The PIC16LC62B-04/SS fits washing-machine, dishwasher, and microwave user-interface boards where its 4MHz throughput and 22 I/O pins comfortably drive keypads, LED/LCD indicators, and relay drivers. The LC variant's 2.5V to 6.0V supply range accepts the unregulated 5V rails typical in these appliances, while the 5-channel 8-bit ADC reads temperature sensors, water level (button analog), and motor current feedback. The PIC16 Mid-Range single-cycle instruction timing yields deterministic response to interrupts from zero-crossing detectors and overcurrent comparators, which is critical for safety interlock behavior. Pairing with the Site-listed PIC16LC622-04/SS as a low-cost BOM alternate supports multi-SKU appliance families.
Recommended
Industrial Sensor Signal Conditioning Nodes
At 4MHz the PIC16LC62B-04/SS executes 5 million 32-bit operations per second, sufficient to poll multiple analog sensors, apply digital filtering, and stream results over a UART/SPI bus. The 5-channel 8-bit ADC reads 4-20mA loop currents, thermistor bridges, and potentiometer wipers at update rates well above typical industrial loop scan periods. The 22 I/O pins drive opto-isolated digital outputs to PLCs or local relays. The LC low-voltage process tolerates the wide supply variation seen in 24V industrial loops stepped down via small switching regulators. Recommended companion is the Site-listed PIC16F88-I/SS for upgraded nodes requiring 10-bit ADC precision.
Recommended
Automotive Body Electronics (Non-Safety)
For non-safety automotive subsystems such as interior lighting, mirror controls, seat position memory, and HVAC blend-door actuators, the PIC16LC62B-04I/SS industrial-grade variant operates from -40C to +85C across the full automotive cabin environment. The 4MHz core handles LIN-bus slave protocol (implemented in firmware via the USART plus timer-based bit-banging for the LIN break/sync) and PWM outputs at 1kHz+ for LED dimming and small DC motor speed control. The LC supply range tolerates cranking transients when paired with a TVS diode and bypass capacitor. Note that this part is not AEC-Q100 qualified; safety-critical ECUs require different Microchip parts.
Recommended
Security System Keypads and Annunciators
The PIC16LC62B-04/SS at 4MHz scans up to 4x4 matrix keypads via 8 digital I/O pins while simultaneously driving piezo buzzers, status LEDs, and a serial data line to the main alarm panel. The 35 single-cycle PIC16 instructions yield a sub-100us keypad scan loop that prevents missed keypresses even during buzzer PWM updates. The 3.5KB OTP program space accommodates custom keypad scan algorithms plus security protocol encoding. The 22 I/O count comfortably handles the keypad, buzzer, LEDs, arm/disarm relay, and a serial interface. The Site-listed PIC16F628-I/SS is the recommended Flash migration for OEM panels that need periodic firmware updates.
Recommended
IR Remote Control Receiver MCUs
The PIC16LC62B-04/SS at 4MHz comfortably decodes consumer-IR protocols (RC-5, NEC, SIRC) in firmware while servicing button inputs and driving IR-LED or display outputs. The 16-bit Timer1 provides microsecond-resolution timestamps needed for IR pulse-width measurement, while the 8-bit Timer0 with prescaler supports the 38kHz/40kHz carrier generation for emitter-side applications. The 22 I/O pins accommodate the IR receiver input, multiple tactile switches, and LED indicator outputs without external muxing. The LC variant's 2.5V minimum enables lithium coin-cell powered remotes with on-board voltage regulation.
Recommended
Small DC Motor and Stepper Control
The PIC16LC62B-04/SS generates multi-channel PWM via its Timer2 period register plus software CCP logic to drive H-bridge motor drivers and unipolar stepper coils at variable speeds. The 4MHz instruction cycle yields PWM frequencies above 20kHz (above audible range) with 8-bit duty resolution sufficient for hobby-grade DC brushed motors, fans, and small unipolar steppers. The 5-channel ADC reads back-EMF, current sense, and tachometer signals for closed-loop speed control. The 22 I/O pins are enough for direction, enable, brake, and fault monitoring across two motor axes. Companion to Site-listed PIC16HV785-I/SS for higher-voltage motor drive applications.
Recommended
Consumer Electronics User Interfaces
The PIC16LC62B-04/SS is well-suited for front-panel MCUs in audio amplifiers, set-top boxes, small kitchen appliances, and consumer gadgets that need a 5x7 or 8x8 LED matrix display, multiple tactile switches, and a rotary encoder. The 22 I/O pins drive both the LED matrix multiplexing transistors and the switch scanning matrix with no external logic. The SSP peripheral supports SPI displays or digital potentiometers for volume control. The LC low-voltage variant runs directly from a 3.3V regulator fed by a wall adapter or USB, simplifying the analog supply chain.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LC62B-04/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LC62B-04I/SS | PIC16LC622-04/SS | PIC16F628-I/SS | PIC16F88-I/SS | PIC16LC62BT-04/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Core | PIC16 Mid-Range 8-bit, 35 instructions | PIC16 Mid-Range 8-bit, identical | PIC16 Mid-Range 8-bit, identical | PIC16 Mid-Range 8-bit, identical | PIC16 Enhanced Mid-Range 8-bit, compatible | PIC16 Mid-Range 8-bit, identical |
| Program Memory | 3.5 KB (2K x 14) OTP EPROM | 3.5 KB OTP EPROM - same | 2 KB OTP EPROM (-43%) | 3.5 KB Flash (reprogrammable) | 7 KB Flash (+100%) | 3.5 KB OTP EPROM - same |
| RAM | 128 B | 128 B - same | 128 B - same | 224 B (+75%) | 368 B (+188%) | 128 B - same |
| Max Clock | 4 MHz | 4 MHz - same | 4 MHz - same | 20 MHz (+400%) | 20 MHz (+400%) | 4 MHz - same |
| Supply Voltage | 2.5 V to 6.0 V (LC low-voltage) | 2.5 V to 6.0 V - same | 2.5 V to 6.0 V - same | 2.0 V to 5.5 V (lower min) | 2.0 V to 5.5 V (lower min) | 2.5 V to 6.0 V - same |
| Operating Temperature | 0C to +70C (commercial) | -40C to +85C (industrial) | 0C to +70C - same | -40C to +85C (industrial) | -40C to +85C (industrial) | 0C to +70C - same |
| Lifecycle / Programming | NRND, OTP (one-time programmable) | NRND, OTP - same | NRND, OTP | Active, Flash (reprogrammable) | Active, Flash (reprogrammable) | NRND, OTP - same |
Key Differentiators
- OTP EPROM with 3.5KB code space in the proven PIC16 Mid-Range architecture (vs PIC16LC622-04/SS)
- Direct pin compatibility with Flash PIC16F628-I/SS for migration path (vs PIC16LC62B (older non-LC 4MHz variant))
- LC low-voltage process variant enables 2.5V minimum supply operation (vs PIC16C62B-04 (C process, 4.5V-6.0V only))
- 22 I/O pins with 5-channel 8-bit ADC and SSP SPI/I2C peripheral (vs PIC16F628-I/SS)
Design Notes
OTP EPROM memory cannot be erased once programmed. Confirm the complete firmware image, configuration-word settings, and oscillator calibration before committing a device with the MPLAB PM3 or PICkit. Adding a PICkit 4 ICSP header to the production PCB is recommended even though the PIC16LC62B itself does not support runtime ICSP - it allows the Flash-based drop-in (PIC16F628-I/SS) to be programmed in-place if a late-stage migration is required. For new designs, skip the OTP part entirely and start with the PIC16F628-I/SS Flash variant in the same 28-SSOP footprint.
The LC variant operates from 2.5V to 6.0V, but brown-out and power-on-reset behavior must be configured in the configuration word. Enable the Brown-Out Reset (BOR) module to hold the MCU in reset when VDD falls below the configured threshold (~3.8V typical for LC parts) - this prevents code corruption in EPROM during slow supply ramps. Place a 100nF ceramic bypass cap directly on the VDD pin (Pin 24) within 5mm trace length, plus a 10uF bulk cap at the board supply entry. The MCLR/VPP pin (not separately bonded out on the 28-SSOP variant shown) must be pulled to VDD through a 10k resistor for normal operation.
Estimated: At 4MHz clock and 6.0V supply, the PIC16LC62B-04/SS draws approximately 2mA active and 1uA sleep (LC process). In the 28-SSOP package with theta_JA approximately 100 C/W (estimated for the small 0.65mm pitch SSOP), the junction temperature rise above ambient at 2mA x 6V = 12mW dissipation is only ~1.2C, well within the 0C to +70C commercial rating. For the -I version in -40C to +85C industrial environments, no additional heatsinking is required. Verify actual theta_JA from the Microchip package thermal characterization document for the SSOP-28 outline if the part is used in sealed enclosures above 60C ambient.
Place the 4MHz crystal or ceramic resonator within 5mm of pins 27 (OSC2) and 28 (OSC1), with short symmetric traces and a ground plane underneath. Add 22pF-33pF load capacitors from each oscillator pin to VSS as required by the specific resonator. For EMI-sensitive applications, the LC (low-voltage) process exhibits slightly better EMI margins than the standard C process due to lower switching currents. Route the ICSP clock (RB6/PGC) and data (RB7/PGD) lines away from switching power and motor driver traces if the Flash drop-in (PIC16F628-I/SS) is being considered for production - the OTP variant does not use these pins in-circuit but the layout must be preserved.
The 28-SSOP package has a 0.65mm pin pitch which requires PCB fabrication with 4-mil traces and spaces minimum (6-mil preferred for manufacturability). Use micro-via-in-pad or dog-bone fan-out to route signals from the fine-pitch pads to wider outer traces. A continuous ground plane on the layer directly under the MCU reduces EMI and provides thermal spreading. The PIC16F628-I/SS and PIC16F88-I/SS Flash drop-in alternatives share this 28-SSOP footprint, so the PCB layout does not change for a Flash migration - only the firmware is updated.
Compliance Information
OTP PIC16C/LC62B family predates formal RoHS/REACH reporting requirements for legacy OTP parts. Compliance status varies by date code - request specific compliance certificates from Microchip or authorized distributors at order time. Part is not AEC-Q100 qualified and not recommended for automotive safety-critical applications. For automotive AEC-Q100 qualified 8-bit MCUs in the PIC16 family, consider PIC16F1843x or PIC16F18xxx series.
