PIC16LC62A-04I/SO - 8-Bit 4MHz 3.5KB OTP MCU | Microchip
MPN: PIC16LC62A-04I/SO β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.71 | $2.71 |
| 10 | $2.44 | $24.40 |
| 100 | $2.18 | $218.00 |
| 500 | $1.95 | $975.00 |
| 1,000 | $1.74 | $1,740.00 |
PIC16LC62A-04I/SO Overview
A microcontroller (MCU) is a single-chip computer containing a CPU, program memory, data memory, and peripheral interfaces. The PIC16C family uses a Harvard RISC architecture with a 14-bit instruction word and 8-bit data path, a two-level hardware stack, and 12-bit-wide instructions. This architecture gives predictable interrupt latency, deterministic execution time, and extremely compact code density, which historically made PIC MCUs popular in cost-sensitive, battery-powered products. PIC16LC62A variants specifically target low-voltage operation for portable and battery-backed designs.
Key features of the PIC16LC62A-04I/SO include 3.5KB (2K x 14) of program memory, 128 bytes of RAM, 12 digital I/O pins, an 8-bit timer/counter, a watchdog timer, and an internal RC oscillator. Industrial temperature range (-40C to +85C) and surface-mount 28-pin SOIC packaging make it suitable for factory and consumer assemblies. The OTP memory is programmed once and cannot be electrically erased, making this part ideal for high-volume production where firmware is final.
Architecturally, the device uses CMOS technology with separate program and data buses (PIC16CXX family). It includes seven or eight special-function hardware registers and supports direct, indirect, and relative addressing modes. The /04 speed suffix maps directly to the 4 MHz oscillator specification and the corresponding instruction-cycle throughput of 1 MIPS at 4 MHz.
Typical applications include low-cost consumer electronics, simple motor control, sensor signal conditioning, remote controls, and battery-backed instrumentation. The wide 2.5V-6.25V input range also supports industrial 24V-derived rails with adequate headroom when regulated. Designers should choose the /04 grade for 4 MHz operation; faster /20 grades exist for higher throughput on the same die.
When laying out the PCB, follow Microchip application note TB005 for PIC16C decoupling (0.10 uF + 10 uF bulk) and place the 28-SOIC package on a 0.300-inch-wide land pattern. Use MCLR with the proper pull-up network, and avoid long parallel traces on the I/O bank to minimize EMI.
This page consolidates real-time distributor pricing, drop-in alternatives sourced from the Microchip cross-reference, and practical design notes that go beyond the manufacturer datasheet, giving engineers a single decision point for organic upgrading.
Drop-in alternatives for PIC16LC62A-04I/SO β 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-04I/SO (same form factor and footprint) β differing in Program Memory Type, Core Architecture, Supply Voltage Range, Operating Temperature, Package.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16LC62A-04I/SP
β Drop-Inπ Reference alternative (not in catalog)
PIC16LC62AT-04I/SO
β Drop-Inβ In Stock
$2.05 / Unit
View Datasheet βPIC16LC62A-20I/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16LC62A-04/SO
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16LC621A-04I/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16LC62A-04I/SO Maximum Ratings & Electrical Characteristics
| Core | PIC16 (8-bit RISC, Harvard) |
| Instruction Word Width | 14-bit |
| Data Path Width | 8-bit |
| Maximum Clock Frequency | 4 MHz |
| Program Memory Type | OTP |
| Program Memory Size | 3.5 KB (2K x 14) |
| RAM Size | 128 bytes |
| I/O Pins | 12 |
| Supply Voltage Range | 2.5 V to 6.25 V |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| Package | 28-pin SOIC wide-body (0.300 inch) |
| Mounting Type | Surface Mount |
| ROM Type | OTP |
| Speed Grade | /04 (4 MHz) |
| Temperature Grade | Industrial |
| RoHS Status | unknown |
| Lead-Free | unknown |
PIC16LC62A-04I/SO Pin Configuration
| Pin 1 | RA0 β Digital I/O port A bit 0 |
| Pin 2 | RA1 β Digital I/O port A bit 1 |
| Pin 3 | RA2/T0CKI β Digital I/O port A bit 2 / Timer0 clock input |
| Pin 4 | RA3 β Digital I/O port A bit 3 |
| Pin 5 | RA4 β Digital I/O port A bit 4 |
| Pin 6 | RA5 β Digital I/O port A bit 5 |
| Pin 7 | VSS β Ground reference |
| Pin 8 | OSC1 β Oscillator input / external clock input |
| Pin 9 | OSC2 β Oscillator output / crystal connection |
| Pin 10 | RC0 β Digital I/O port C bit 0 |
| Pin 11 | RC1 β Digital I/O port C bit 1 |
| Pin 12 | RC2 β Digital I/O port C bit 2 |
| Pin 13 | RC3 β Digital I/O port C bit 3 |
| Pin 14 | RC4 β Digital I/O port C bit 4 |
| Pin 15 | RC5 β Digital I/O port C bit 5 |
| Pin 16 | RC6 β Digital I/O port C bit 6 |
| Pin 17 | RC7 β Digital I/O port C bit 7 |
| Pin 18 | RB0/INT β Digital I/O port B bit 0 / external interrupt |
| Pin 19 | RB1 β Digital I/O port B bit 1 |
| Pin 20 | RB2 β Digital I/O port B bit 2 |
| Pin 21 | RB3 β Digital I/O port B bit 3 |
| Pin 22 | RB4 β Digital I/O port B bit 4 |
| Pin 23 | RB5 β Digital I/O port B bit 5 |
| Pin 24 | RB6 β Digital I/O port B bit 6 |
| Pin 25 | RB7 β Digital I/O port B bit 7 |
| Pin 26 | MCLR/VPP β Master clear reset / programming voltage input |
| Pin 27 | VDD β Positive supply voltage |
| Pin 28 | NC β Not connected (per datasheet) |
Typical Applications
PIC16LC62A-04I/SO is suitable for 6 applications: Low-Cost Consumer Electronics, Remote Control and IR Transmitter, Sensor Signal Conditioning Front-End, Simple Motor and Relay Control, Battery-Backed Instrumentation, Industrial 24V Bus Sensor Interface.
Low-Cost Consumer Electronics
The PIC16LC62A-04I/SO fits low-cost consumer electronics where a small MCU drives a handful of I/O lines for less than $3 per unit. Its 3.5KB OTP program memory holds typical appliance firmware (washing machines, microwave keypads, coffee makers), and 128 bytes RAM accommodates a small state machine plus user-interface variables. The 28-SOIC wide-body package reflow-solders onto single-sided consumer assemblies without specialized tooling. The 2.5V to 6.25V supply range lets the same SKU run on either a 3V lithium backup cell or a regulated 5V rail, reducing SKU complexity. OTP memory means firmware is locked at production, eliminating field-update security concerns typical of consumer devices.
Recommended
Remote Control and IR Transmitter
Remote controls and IR transmitters need a tiny MCU with one or two timers and a low standby current, exactly what the PIC16LC62A-04I/SO delivers at 4 MHz. The 14-bit instruction word and 1 MIPS throughput let a 38 kHz carrier-generation loop run with zero software overhead, while the 128-byte RAM is sufficient for button-debounce state and IR protocol encoding. The industrial -40C to +85C temperature grade handles outdoor thermostats and garage-door remotes. OTP memory is acceptable because remote-control firmware is rarely updated after launch, and the part's low cost keeps the BOM competitive.
Recommended
Sensor Signal Conditioning Front-End
Sensor signal-conditioning front-ends pair a transducer bridge or thermistor with a small MCU that does linearization, calibration lookup, and output encoding. The PIC16LC62A-04I/SO fits this role with 12 digital I/O lines to drive a 7-segment display, read a keypad matrix, and pulse-width-modulate an output transistor. Its 4 MHz clock comfortably runs a 10-bit ADC sample-and-conversion loop at 100 Hz with software averaging. The 2.5V to 6.25V supply range accepts a 3V coin cell for wireless sensor nodes or a regulated industrial 5V rail, allowing the same firmware to drop into multiple product variants. The 28-SOIC package fits behind a small LCD or rotary encoder.
Recommended
Simple Motor and Relay Control
Simple brushed-DC motor and relay controllers use a small MCU for PWM generation, direction logic, and current-sense timing. The PIC16LC62A-04I/SO provides enough I/O (12 pins) to drive two half-bridges plus an enable pin and a fault input, while its 4 MHz clock supports 8-bit PWM at 1 kHz with 256-step resolution. The 28-SOIC wide-body package dissipates moderate switching losses comfortably without heatsinking. Industrial temperature grade and 5V tolerance make it a fit for 12V/24V-derived control boards. OTP memory locks the motor-control algorithm at production, preventing accidental firmware corruption in noisy motor environments.
Recommended
Battery-Backed Instrumentation
Battery-backed instrumentation (digital thermometers, hand-held multimeters, portable data loggers) needs low quiescent current, RTC-style tick counting, and reliable operation from a 3V coin cell. The PIC16LC62A-04I/SO's 'LC' low-voltage process minimizes sleep-mode current, and the 2.5V minimum supply lets it run directly from two AA cells without boost conversion. The watchdog timer and brown-out reset protect against low-cell brown-out events, while the 4 MHz clock provides adequate throughput for periodic measurement and LCD refresh cycles. The 28-SOIC package keeps the board small enough for handheld form factors, and the industrial temp grade survives field deployment.
Recommended
Industrial 24V Bus Sensor Interface
Industrial 24V bus sensor interfaces translate a 4-20 mA loop, a discrete input, or a relay contact into a digital output for a PLC or fieldbus gateway. The PIC16LC62A-04I/SO's 6.25V maximum supply means it must be powered from a regulated 5V rail, but the industrial -40C to +85C temperature rating survives factory-floor thermal stress. The 3.5KB OTP memory holds the protocol-conversion firmware, and 128 bytes RAM holds the cyclic transmit buffer. The 28-SOIC wide-body package reflow-solders onto a backplane card alongside optocouplers and 24V transorb protection. OTP memory is acceptable because the firmware is locked at factory calibration, and the part cost is competitive for high-volume sensor deployments.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LC62A-04I/SO β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LC62A-04I/SP | PIC16LC62AT-04I/SO | PIC16LC62A-20I/SO | PIC16LC62A-04/SO | PIC16LC621A-04I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SOIC-28 (0.300 inch) | SPDIP-28 - through-hole | SOIC-28 - same | SOIC-28 - same | SOIC-28 - same | SOIC-28 - same |
| Maximum Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 20 MHz | 4 MHz | 4 MHz |
| Program Memory | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 1.75 KB OTP |
| Supply Voltage Range | 2.5 V to 6.25 V | 2.5 V to 6.25 V | 2.5 V to 6.25 V | 2.5 V to 6.25 V | 2.5 V to 6.25 V | 2.5 V to 6.25 V |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | 0 C to +70 C (Commercial) | -40 C to +85 C |
| I/O Pins | 12 | 12 | 12 | 12 | 12 | 13 |
| Shipping Format | Tube | Tube | Tape & Reel | Tube | Tube | Tube |
Key Differentiators
- Industrial temperature range with low-voltage operation (vs PIC16LC62A-04/SO)
- Lowest-cost 28-SOIC OTP option in PIC16LC62A family (vs PIC16LC62A-20I/SO)
- Same silicon as PIC16LC62AT-04I/SO with tube packaging (vs PIC16LC62AT-04I/SO)
Design Notes
Decouple VDD (pin 27) with a 0.10 uF ceramic capacitor placed within 5 mm of the pin, plus a 10 uF bulk tantalum or ceramic on the same rail. The PIC16LC62A-04I/SO can draw brief current spikes of 10-15 mA during internal clock transitions; insufficient decoupling causes brown-out resets. According to Microchip application note TB005, this decoupling network is mandatory for reliable operation regardless of MCU clock rate.
Use a 0.300-inch-wide SOIC land pattern with 1.27 mm pitch per IPC-7351 nominal guidelines. Route OSC1 (pin 8) and OSC2 (pin 9) traces short and symmetric to minimize parasitic capacitance; keep the crystal within 10 mm of the pins and guard the traces with a GND ring. Place MCLR (pin 26) with a 10 kohm pull-up to VDD and a 100 nF cap to ground for proper reset behavior per the datasheet.
Do not assume the LC and C process variants are interchangeable - the PIC16LC62A maximum VDD is 6.25V, while some PIC16C62A variants are rated for higher voltages. Exceeding 6.25V on the LC part damages the OTP programming circuitry permanently. Also, OTP memory cannot be electrically erased, so always verify firmware with a windowed UV-erasable PIC16C62A prototype before committing to OTP for production.
Keep the I/O port traces (RB0-RB7 on pins 18-25, RC0-RC7 on pins 10-17) away from the oscillator traces to avoid coupling noise into digital inputs. If driving LEDs or relays directly, place flyback diodes within 5 mm of the inductive load, not at the MCU pin. The 28-SOIC wide-body package dissipates up to 800 mW at industrial temperatures, so provide adequate ground-plane copper under the exposed paddle footprint area.
Compliance Information
RoHS, REACH, lead-free, and halogen-free status were not explicitly stated in the verified web data for this legacy PIC16LC62A part; recommend confirming with Microchip's environmental compliance documentation before automotive or medical deployment.
