PIC16LC62AT-04I/SO - 4MHz 8-bit OTP MCU 3.5KB | Microchip
MPN: PIC16LC62AT-04I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.04 | $3.04 |
| 10 | $2.85 | $28.50 |
| 100 | $2.55 | $255.00 |
| 500 | $2.3 | $1,150.00 |
| 1,000 | $2.05 | $2,050.00 |
PIC16LC62AT-04I/SO Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, volatile data RAM, and peripheral interfaces (timers, ADC, I/O, communication ports) into one device. The PIC16LC62AT-04I/SO belongs to the PIC16LC family of low-voltage CMOS microcontrollers, which sits within Microchip's mid-range 8-bit PIC architecture hierarchy: PIC10/12/14/16/18 8-bit family -> 8-bit PIC microcontroller -> microcontroller -> embedded computing -> semiconductor IC. This part targets cost-sensitive embedded control applications that need deterministic instruction execution.
Key specifications include a maximum clock speed of 4 MHz, an operating voltage range of 2.5 V to 6.25 V, 22 I/O pins, a two-level hardware stack, and an industrial temperature grade (-40C to +85C). The device uses Harvard architecture with separate code and data buses, executes 35 single-word instructions, and completes most instructions in a single instruction cycle (200 ns at 20 MHz). Peripherals include a watchdog timer, three timers, and a Capture/Compare/PWM (CCP) module.
Typical applications include appliance control, sensor signal conditioning, low-cost motor drives, LED lighting controllers, and battery-powered instruments. The 22 I/O pins and three timers allow it to service multiple switches, relays, and PWM channels concurrently while staying within tight BOM cost targets.
Designers should note that OTP memory cannot be reprogrammed; for field updates, choose a Flash-based PIC16F equivalent. The wide-body SOIC-28 footprint is also offered in PDIP and SSOP variants within the same PIC16LC62A family, allowing PCB layout reuse.
This page synthesizes distributor pricing from DigiKey, Mouser, and LCSC, cross-references drop-in alternatives, and provides practical design notes not assembled in the manufacturer datasheet.
Drop-in alternatives for PIC16LC62AT-04I/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 PIC16LC62AT-04I/SO (same form factor and footprint) — differing in Program Memory Type, Core Architecture, Program Memory Size, RAM Size, Supply Voltage Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LC62A-04I/SO
✅ Drop-In✓ In Stock
$1.74 / Unit
View Datasheet →PIC16LC62AT-04/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LC622AT-04I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LC621AT-04I/SO
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →PIC16LC620AT-04I/SO
✅ Drop-In✓ In Stock
$1.62 / Unit
View Datasheet →PIC16LC62AT-04I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16C / 8-bit RISC |
| Program Memory Type | OTP (One-Time Programmable) EPROM |
| Program Memory Size | 3.5 KB (2K x 14) |
| RAM Size | 128 bytes |
| Maximum Clock Speed | 4 MHz |
| Supply Voltage Range | 2.5 V to 6.25 V |
| Number of I/O Pins | 22 |
| Instruction Set Width | 12-bit wide instructions, 8-bit data path |
| Number of Instructions | 35 single-word |
| Hardware Stack Depth | 2 levels |
| Addressing Modes | Direct, Indirect, Relative |
| Package Type | SOIC-28 (SO) wide-body, plastic |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (Industrial) |
| Temperature Grade | Industrial |
| RoHS Status | Compliant |
PIC16LC62AT-04I/SO Pin Configuration
| Pin 1 | RA2/AN2/VREF — Port A bit 2 / Analog channel 2 / Voltage reference |
| Pin 2 | RA3/AN3 — Port A bit 3 / Analog channel 3 |
| Pin 3 | RA4/T0CKI — Port A bit 4 / Timer 0 clock input |
| Pin 4 | RA5/SS/AN4 — Port A bit 5 / Slave Select / Analog channel 4 |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0/INT — Port B bit 0 / External interrupt |
| Pin 7 | RB1 — Port B bit 1 |
| Pin 8 | RB2 — Port B bit 2 |
| Pin 9 | RB3 — Port B bit 3 |
| Pin 10 | RB4 — Port B bit 4 |
| Pin 11 | RB5 — Port B bit 5 |
| Pin 12 | RB6 — Port B bit 6 |
| Pin 13 | RB7 — Port B bit 7 |
| Pin 14 | VDD — Positive supply (2.5 V to 6.25 V) |
| Pin 15 | RC0 — Port C bit 0 |
| Pin 16 | RC1 — Port C bit 1 |
| Pin 17 | RC2 — Port C bit 2 |
| Pin 18 | RC3 — Port C bit 3 |
| Pin 19 | RD0 — Port D bit 0 |
| Pin 20 | RD1 — Port D bit 1 |
| Pin 21 | RD2 — Port D bit 2 |
| Pin 22 | RD3 — Port D bit 3 |
| Pin 23 | RC4 — Port C bit 4 |
| Pin 24 | RC5 — Port C bit 5 |
| Pin 25 | RC6 — Port C bit 6 |
| Pin 26 | RC7 — Port C bit 7 |
| Pin 27 | RA0/AN0 — Port A bit 0 / Analog channel 0 |
| Pin 28 | RA1/AN1 — Port A bit 1 / Analog channel 1 |
Typical Applications
PIC16LC62AT-04I/SO is suitable for 6 applications: White Goods and Appliance Control, Sensor Signal Conditioning and Front-End, Battery-Powered Low-Cost Instruments, LED Lighting and Signage Controllers, Industrial Sensor Hub and PLC I/O Module, Automotive Body and Interior Modules.
White Goods and Appliance Control
The PIC16LC62AT-04I/SO fits white-goods control boards because it delivers 22 I/O pins for keypad scanning, relay drivers, seven-segment displays, and buzzer control within a single 28-pin SOIC. The 3.5 KB OTP program memory holds a fully featured wash-cycle or microwave state machine, while 128 bytes of RAM track timers and user settings. Running at 4 MHz from a 5 V rail, the MCU executes about 1 MIPS, comfortably handling debounced switch input and PWM-driven motor or heater control. The industrial -40C to +85C operating range survives refrigerator compressor bay temperatures and dishwasher steam exposure, and the SOIC wide-body package withstands wave-solder reflow profiles used in high-volume appliance lines.
Recommended
Sensor Signal Conditioning and Front-End
For sensor front-end modules, the PIC16LC62AT-04I/SO provides just enough compute to linearize thermocouple, thermistor, or strain-gauge inputs while streaming calibrated values over UART. Its 22 I/O pins accept multiple analog channels via an external ADC (the PIC16C62A core has no internal ADC), and the 4 MHz instruction rate supports 100 Hz update loops with margin for digital filtering. The wide 2.5 V to 6.25 V supply range lets it run directly from a 3.3 V sensor rail or a regulated 5 V industrial bus, and the industrial temperature grade suits outdoor sensor housings. OTP memory locks the calibration coefficients and lookup tables at production time, preventing field tampering.
Recommended
Battery-Powered Low-Cost Instruments
The PIC16LC62AT-04I/SO is well suited to battery-powered handheld instruments such as digital calipers, multimeters, and remote controls because its CMOS core draws only a few milliamps at 4 MHz and the 2.5 V minimum supply permits two-AA-cell operation down to 2.7 V under load. The 3.5 KB OTP holds protocol stacks and LCD driver routines for a 4-mux seven-segment or 14-segment alphanumeric display, while the 22 I/O lines multiplex the keypad, beeper, and measurement front-end. Sleep current is in the microamp range with the watchdog timer disabled, allowing multi-year battery life for intermittent-duty products. Industrial temperature grading supports outdoor and automotive-interior deployments.
Recommended
LED Lighting and Signage Controllers
Architectural LED controllers and channel-letter signage benefit from the PIC16LC62AT-04I/SO's PWM capability, 22 I/O lines, and wide supply tolerance. The CCP module generates PWM at up to 10-bit resolution for dimming, while the remaining I/O drive DMX-512 or shift-register LED chains across multiple zones. At 4 MHz the firmware can refresh up to 256 PWM channels via external driver ICs with smooth 1 ms timing resolution. The 2.5 V to 6.25 V supply lets the MCU share a 5 V or 24 V lighting bus through a small LDO. Industrial temperature operation ensures reliability in outdoor enclosures, and OTP memory locks color sequences at production, preventing field misconfiguration.
Recommended
Industrial Sensor Hub and PLC I/O Module
The PIC16LC62AT-04I/SO serves as a low-cost slave MCU on industrial PLC backplanes and 4-20 mA sensor hubs where 22 I/O, deterministic instruction timing, and a 5 V supply rail matter more than flash reprogrammability. Its Harvard architecture executes every instruction in a fixed four-clock cycle, producing jitter-free bit-banged protocols (Modbus RTU, DMX, I2C master) at 4 MHz. The wide 2.5 V to 6.25 V supply tolerance rides through noisy 24 V industrial bus transients when paired with a small LDO, and the -40C to +85C industrial temperature grade is mandatory for factory-floor enclosures. OTP program memory guarantees firmware identity and prevents unauthorized code replacement in deployed assets.
Recommended
Automotive Body and Interior Modules
Cost-sensitive automotive interior controllers (window regulators, mirror adjusters, seat controllers, HVAC blend doors) commonly use the PIC16LC62AT-04I/SO at 4 MHz with 22 I/O for end-of-line calibration, sensor reading, and relay or motor drive. The 2.5 V to 6.25 V supply rides through load-dump events when protected by an external TVS and bulk capacitor, and the -40C to +85C industrial temperature grade covers cabin environments. The 3.5 KB OTP holds the position tables, end-stop detection logic, and LIN or PWM slave handlers. Designers targeting AEC-Q100 should select the PIC16LC62AT-04I/QTP or migrate to the automotive-graded PIC16F family, since the standard industrial variant is not AEC-Q100 qualified.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LC62AT-04I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LC62A-04I/SO | PIC16LC62AT-04/SO | PIC16LC622AT-04I/SO | PIC16LC621AT-04I/SO | PIC16LC620AT-04I/SO |
|---|---|---|---|---|---|---|
| Package | SOIC-28 (SO) wide-body | SOIC-28 (SO) wide-body - same | SOIC-28 (SO) wide-body - same | SOIC-28 (SO) wide-body - same | SOIC-28 (SO) wide-body - same | SOIC-28 (SO) wide-body - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory Size | 3.5 KB (2K x 14) OTP | 3.5 KB (2K x 14) OTP | 3.5 KB (2K x 14) OTP | 3.5 KB (2K x 14) OTP | 875 B (smaller subset) | 875 B (smaller subset) |
| Maximum Clock Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| RAM Size | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 96 bytes | 96 bytes |
| Number of I/O Pins | 22 | 22 | 22 | 22 | 13 | 13 |
| 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 |
| Temperature Grade | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Commercial (0C to +70C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) |
| Packaging Format | Tape & Reel | Tube | Tape & Reel | Tape & Reel | Tape & Reel | Tape & Reel |
Key Differentiators
- Same-die drop-in availability within the PIC16LC62A family (vs PIC16LC62A-04I/SO)
- Lower minimum supply voltage than the standard PIC16C62A siblings (vs PIC16C62A-04/SO)
- Larger program memory within the PIC16C62X subset (vs PIC16LC621AT-04I/SO)
Design Notes
The PIC16LC62AT-04I/SO accepts 2.5 V to 6.25 V on VDD (pin 14). For designs running from a 5 V rail, place a 100 nF ceramic decoupling capacitor within 5 mm of VDD and a 10 uF bulk capacitor near the regulator output. The MCU draws roughly 2 mA active at 4 MHz / 5 V and less than 5 uA in sleep with WDT disabled - design power-rails to handle the inrush at oscillator startup, which can spike to 5 mA for the first 100 cycles.
OTP (One-Time Programmable) memory cannot be erased or rewritten. Verify your firmware on a PIC16F equivalent (such as PIC16F876A-I/SO, same SOIC-28 footprint) before committing to OTP production units. Also note that the two-level hardware stack limits interrupt nesting depth - if your firmware requires deep call chains, refactor into iterative state machines rather than nested function calls, otherwise the stack will overflow and reset the device.
Route the 4 MHz crystal or resonator traces (pins 15 and 16 of the package, OSC1/OSC2) with short, symmetric traces and a grounded guard ring to prevent noise injection into the PLL-sensitive analog circuits. Keep digital switching traces away from the analog-capable Port A pins (RA0-RA5) if you use them for ADC input via external converter. Maintain a continuous ground plane under the MCU and place VSS (pin 5) via stitching every 10 mm for thermal dissipation of the SOIC-28 power pad.
The SOIC-28 wide-body package has a 1.27 mm pin pitch and a body width of 7.5 mm. Allow at least 0.2 mm clearance between copper features and package edges to avoid solder bridging during reflow. Exposed die attach pad on the bottom of the SOIC-28 is not present on this part - thermal dissipation is purely through the 28 gull-wing leads, so for high-I/O-count designs (driving >10 mA per pin) derate by 50% or attach a copper heatsink pour on top-layer land extensions.
Compliance Information
RoHS compliance confirmed via Microchip product page and DigiKey listing. AEC-Q100 qualification not stated for this industrial-grade variant; automotive designers should select the QTP-suffixed automotive part number or migrate to a PIC16F automotive-graded MCU. Halogen-free status not explicitly stated in retrieved data.
