PIC16LC62AT-04I/SS - 8-Bit 4MHz OTP MCU 3.5KB | Microchip
MPN: PIC16LC62AT-04I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.85 | $38.50 |
| 100 | $3.5 | $350.00 |
| 500 | $3.1 | $1,550.00 |
| 1,000 | $2.75 | $2,750.00 |
PIC16LC62AT-04I/SS Overview
An 8-bit PIC (Peripheral Interface Controller) microcontroller is a RISC-based computing device that integrates a CPU, program memory, data RAM, peripheral timers, and I/O into a single chip. PIC microcontrollers occupy the embedded-MCU branch of the broader microcontroller taxonomy (MCU -> embedded controller -> semiconductor IC) and are widely used in cost-sensitive control applications where deterministic instruction execution and a small footprint are valued over raw processing throughput. The PIC16C family specifically uses a 14-bit instruction word set with a Harvard architecture separating program and data memory paths.
Key features of the PIC16LC62AT-04I/SS include a 4MHz maximum clock speed, 12 I/O pins, a two-level hardware stack, 35 single-word instructions, 8-bit wide data path with 12-bit wide instructions, and direct/indirect/relative addressing modes. The OTP memory is one-time programmable, making this device appropriate for low-volume production runs or mature designs where code has been finalized. All instructions execute in a single cycle except program branches, which take two cycles, providing predictable timing for interrupt-driven and polled control loops.
Typical applications include appliance control, industrial sensor interfacing, LED drivers, low-end motor control, and battery-powered instrumentation where the wide 2.5V-6.25V supply range provides design flexibility. The 22 I/O pins (per Jotrin data) and multiple timer/counter peripherals enable direct connection of buttons, LEDs, relays, and analog sensor front-ends.
When designing with this OTP device, program the finalized firmware before final PCB assembly because OTP parts cannot be reprogrammed. Provide adequate decoupling (100nF + 10uF) close to VDD/VSS, and use the MCLR pin reset with a 10k pull-up to VDD for reliable startup. Code development should be performed on a UV-erasable PIC16C62A windowed sample first, with the OTP version used for production.
Drop-in alternatives for PIC16LC62AT-04I/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 PIC16LC62AT-04I/SS (same form factor and footprint) — differing in Core Architecture, Program Memory Size, Program Memory Type, Instruction Set Width, Operating Temperature Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LC62A-04I/SS
✅ Drop-In✓ In Stock
$1.86 / Unit
View Datasheet →PIC16LC62AT-04/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LC62AT-04I/SO
✅ Drop-In✓ In Stock
$2.05 / Unit
View Datasheet →PIC16LC622T-04E/SS
✅ Drop-In✓ In Stock
$2.6 / Unit
View Datasheet →PIC16LC622A-04I/SS
✅ Drop-In✓ In Stock
$1.56 / Unit
View Datasheet →PIC16LC621AT-04I/SS
✅ Drop-In✓ In Stock
$2.46 / Unit
View Datasheet →PIC16LC62AT-04I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC |
| Core Series | PIC16C |
| CPU Bit Width | 8-bit |
| Maximum Clock Speed | 4 MHz |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 3.5 KB (2K x 14) |
| RAM Size | 128 x 8 bytes |
| I/O Pins | 22 |
| Supply Voltage Range | 2.5 V to 6.25 V |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| Package Type | 28-pin SSOP |
| Mounting Type | Surface Mount |
| Instruction Set Width | 14-bit |
| Number of Instructions | 35 single-word |
| Stack Depth | 2 levels (hardware) |
| Addressing Modes | Direct, Indirect, Relative |
PIC16LC62AT-04I/SS Pin Configuration
| Pin 1 | MCLR — Master Clear (Reset) input, active low |
| Pin 2 | OSC1 — Oscillator input or external clock input |
| Pin 3 | OSC2 — Oscillator output |
| Pin 4 | RA0 — Port A bit 0 (digital I/O) |
| Pin 5 | RA1 — Port A bit 1 (digital I/O) |
| Pin 6 | RA2 — Port A bit 2 (digital I/O) |
| Pin 7 | RA3 — Port A bit 3 (digital I/O) |
| Pin 8 | RA4 — Port A bit 4 (digital I/O / Timer0 clock) |
| Pin 9 | RA5 — Port A bit 5 (digital I/O) |
| Pin 10 | VSS — Ground reference |
| Pin 11 | RB0 — Port B bit 0 (interrupt-on-change) |
| Pin 12 | RB1 — Port B bit 1 (digital I/O) |
| Pin 13 | RB2 — Port B bit 2 (digital I/O) |
| Pin 14 | RB3 — Port B bit 3 (digital I/O) |
| Pin 15 | RB4 — Port B bit 4 (interrupt-on-change) |
| Pin 16 | RB5 — Port B bit 5 (interrupt-on-change) |
| Pin 17 | RB6 — Port B bit 6 (interrupt-on-change / ICSP clock) |
| Pin 18 | RB7 — Port B bit 7 (interrupt-on-change / ICSP data) |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply voltage |
| Pin 21 | RC0 — Port C bit 0 (digital I/O) |
| Pin 22 | RC1 — Port C bit 1 (digital I/O) |
| Pin 23 | RC2 — Port C bit 2 (digital I/O) |
| Pin 24 | RC3 — Port C bit 3 (digital I/O) |
| Pin 25 | RC4 — Port C bit 4 (digital I/O) |
| Pin 26 | RC5 — Port C bit 5 (digital I/O) |
| Pin 27 | RC6 — Port C bit 6 (digital I/O / TX) |
| Pin 28 | RC7 — Port C bit 7 (digital I/O / RX) |
Typical Applications
PIC16LC62AT-04I/SS is suitable for 7 applications: Appliance Control Boards, Industrial Sensor Interface, LED Lighting Controllers, Battery-Powered Instrumentation, Remote Control Transmitters, Automotive Body Controllers, Smart Home Sensor Nodes.
Appliance Control Boards
The PIC16LC62AT-04I/SS fits appliance control boards where 8-bit processing, 22 I/O lines, and OTP memory are sufficient. Its 2.5V-6.25V supply range supports direct connection to rectified 5V rails in washing machines, microwave ovens, and dishwashers. The 4MHz clock provides deterministic instruction timing for sensor polling and relay actuation loops. With 3.5KB OTP, finalized firmware can be programmed at production without field-update concerns, reducing per-unit cost. The 28-SSOP package fits compact control PCBs behind user-interface panels.
Recommended
Industrial Sensor Interface
The PIC16LC62AT-04I/SS handles industrial sensor interface tasks such as temperature monitoring, level detection, and switch debouncing. Its industrial temperature grade (-40C to +85C) and 22 I/O lines enable direct connection of multiple digital sensors, optocouplers, and indicator LEDs. The PIC RISC core executes deterministic polling loops, while the 35-instruction set keeps firmware simple. The 2.5V-6.25V range tolerates industrial 24V-bus-derived 5V rails with adequate regulation.
Recommended
LED Lighting Controllers
For LED lighting controllers, the PIC16LC62AT-04I/SS drives PWM channels to dim LEDs and switches between color modes. Its 22 I/O pins support multi-channel PWM generation, current-sense ADC inputs, and button/keypad inputs. The 4MHz clock provides 1 microsecond instruction cycle, suitable for 1kHz PWM frequencies with 8-bit resolution. OTP memory locks finalized color profiles at production, preventing unauthorized field modification. Low-voltage operation down to 2.5V enables battery-powered decorative LED strips.
Recommended
Battery-Powered Instrumentation
The PIC16LC62AT-04I/SS operates from 2.5V minimum, suitable for battery-powered instrumentation running from two AA cells or lithium chemistries. Its wide supply range down to 2.5V allows direct operation from a discharged 3V lithium cell without boost conversion. The 8-bit RISC core consumes minimal active power, and the industrial temperature grade supports outdoor or cold-environment deployments. 22 I/O lines accommodate sensor multiplexing, display driving, and user-button inputs in portable test equipment.
Recommended
Remote Control Transmitters
The PIC16LC62AT-04I/SS builds low-cost IR/RF remote control transmitters where 8-bit processing suffices for keypad scanning and protocol encoding. Its 22 I/O pins accommodate 4x4 keypads, LED indicators, and transmit-enable controls. The 3.5KB OTP memory holds fixed protocol code for production units without field updates. Wide voltage range supports both alkaline (3V) and lithium (3.6V) battery chemistries. SSOP-28 package fits slim handheld enclosures.
Recommended
Automotive Body Controllers
The PIC16LC62AT-04I/SS appears in automotive body controllers for window lifts, mirror adjusters, and seat controls where extended temperature range and reliable OTP firmware matter. The industrial -40C to +85C grade handles under-dash thermal environments. 22 I/O lines drive multiple relays and read position-switch inputs. Wide 2.5V-6.25V supply tolerates 12V battery transients when properly regulated. OTP firmware prevents unauthorized reflashing of safety-related body functions.
Recommended
Smart Home Sensor Nodes
The PIC16LC62AT-04I/SS functions as a smart home sensor node reading temperature, humidity, or motion detectors and forwarding via simple UART/SPI links. The 22 I/O pins accommodate multiple analog sensor channels and digital interfaces. OTP memory locks firmware at production, preventing reverse engineering of proprietary algorithms. Wide 2.5V-6.25V supply range enables direct battery or USB-derived power. SSOP-28 fits compact wall-switch form factors.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LC62AT-04I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LC62A-04I/SS | PIC16LC62AT-04/SS | PIC16LC62AT-04I/SO | PIC16LC622T-04E/SS |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SOIC - wider body | 28-SSOP - same |
| Core Architecture | PIC16C 8-bit RISC | PIC16C 8-bit RISC | PIC16C 8-bit RISC | PIC16C 8-bit RISC | PIC16C 8-bit RISC |
| Clock Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Program Memory | 3.5KB OTP | 3.5KB OTP | 3.5KB OTP | 3.5KB OTP | 3.5KB OTP |
| RAM Size | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| Supply Voltage | 2.5V to 6.25V | 2.5V to 6.25V | 2.5V to 6.25V | 2.5V to 6.25V | 2.5V to 6.25V |
| Temperature Grade | Industrial -40C to +85C | Industrial -40C to +85C | Commercial 0C to +70C | Industrial -40C to +85C | Extended -40C to +125C |
Key Differentiators
- Industrial temperature grade with wide supply range (vs PIC16LC62AT-04/SS)
- Tape-and-reel packaging for automated assembly (vs PIC16LC62A-04I/SS)
- Wide 2.5V-6.25V supply range supports battery and 5V systems (vs PIC16F690T-I/SS)
Design Notes
Place a 100nF ceramic decoupling capacitor as close as possible to the VDD pin (pin 20) with the ground via returning directly to the VSS pin (pin 19). Add a bulk 10uF tantalum or aluminum electrolytic capacitor on the board supply rail. The PIC16LC62A's wide 2.5V-6.25V supply range tolerates noisy rectified rails, but a linear regulator (LM7805 or LDO) provides cleaner power for ADC accuracy. Estimated: at 4MHz active, supply current is roughly 2mA typical.
Route the MCLR pin (pin 1) with a 10k pull-up resistor to VDD and a 100nF capacitor to ground for hardware reset noise immunity. The ICSP clock (RB6) and ICSP data (RB7) pins must be accessible on the PCB for in-circuit programming during prototyping. Keep the oscillator traces (OSC1/OSC2) short and shield them from high-current switching traces to prevent clock jitter. Use a ground plane under the SSOP-28 package for EMI suppression.
OTP memory cannot be erased or reprogrammed - verify all firmware on a UV-erasable PIC16C62A windowed sample (PIC16C62A-04/JW) before committing to OTP production. Configuration word settings (oscillator mode, watchdog timer, code protection) are critical and must be set correctly during programming. The two-level hardware stack limits interrupt nesting - design ISRs carefully to avoid stack overflow. Brown-out reset should be enabled via configuration bits for reliable operation across supply transients.
Estimated: at 4MHz active supply current is approximately 2mA at 5V, giving 10mW typical dissipation - well below thermal limits for the 28-SSOP package. Industrial -40C to +85C temperature range requires standard SMT thermal management. No external heatsink required. Verify junction temperature stays within operating limits by measuring supply current at maximum ambient temperature during qualification.
Compliance Information
PIC16C family is mature product line. MSL rating, RoHS, and REACH compliance not explicitly stated in the verified web data and require direct confirmation from Microchip product documentation. AEC-Q100 not applicable for non-automotive-qualified legacy OTP parts.
