PIC16LC62BT-04I/SS - 4MHz 8-bit OTP MCU 22 I/O | Microchip SSOP-28
MPN: PIC16LC62BT-04I/SS ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.42 | $5.42 |
| 10 | $4.78 | $47.80 |
| 100 | $4.21 | $421.00 |
| 500 | $3.75 | $1,875.00 |
| 1,000 | $3.3 | $3,300.00 |
PIC16LC62BT-04I/SS Overview
A PIC (Peripheral Interface Controller) microcontroller is a compact, self-contained computer-on-a-chip that integrates a CPU, non-volatile program memory (ROM/Flash/OTP), volatile working memory (RAM), and configurable peripheral blocks such as timers, ADC, UART, and I/O ports. PIC16C-series OTP parts sit inside the broader taxonomy: PIC16 -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor, and are typically used where code is finalized in production and does not need field re-programming. The "LC" rail variant is optimized for low-voltage and battery-powered operation compared to the standard "C" family.
Key features of the PIC16LC62BT-04I/SS include an instruction set of only 35 single-word instructions (most executed in a single instruction cycle, except program branches which take two), a 14-bit instruction width, hardware stack, internal watchdog timer, and an operating temperature grade "I" (industrial, -40C to +85C). The "04" speed grade specifies a 4 MHz oscillator maximum, and the trailing "T" indicates tape-and-reel packaging.
This device uses a RISC (Reduced Instruction Set Computing) Harvard architecture, which separates program and data memory buses to allow simultaneous fetch and execute. Combined with CMOS low-power design, the result is deterministic interrupt latency and very low quiescent current, which is well suited to applications where predictable response time matters more than raw MIPS.
Typical applications include industrial control logic, appliance controllers, sensor signal conditioning, low-power remote keyless entry, automotive body modules, smart-card readers, and small battery-powered embedded nodes where OTP cost advantage outweighs the lack of in-system reprogramming.
When designing with this device, plan the OTP programming flow into manufacturing: firmware must be fully validated before commit, since OTP parts cannot be erased and re-programmed. The SSOP-28 footprint also requires standard JEDEC surface-mount land pattern compatibility for reflow soldering.
This page synthesizes distributor pricing, drop-in alternatives sourced from Microchip cross-reference data, and practical design notes that are not assembled in any one manufacturer document.
Drop-in alternatives for PIC16LC62BT-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 PIC16LC62BT-04I/SS (same form factor and footprint) — differing in Package, Core Architecture, Program Memory Type, I/O Pins, Program Memory Size.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LC62B-04I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LC62BT-04I/SO
✅ Drop-In✓ In Stock
$3.1 / Unit
View Datasheet →PIC16LC622A-04I/SS
✅ Drop-In✓ In Stock
$1.56 / Unit
View Datasheet →PIC16LC620A-04I/SS
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →PIC16F628A-I/SS
✅ Drop-In✓ In Stock
$1.41 / Unit
View Datasheet →PIC16LF628A-I/SS
✅ Drop-In✓ In Stock
$1.65 / Unit
View Datasheet →PIC16LC62BT-04I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16 (8-bit RISC Harvard) |
| Family | PIC16C OTP Microcontroller |
| Program Memory Type | OTP (One-Time-Programmable) |
| Program Memory Size | 3.5 KB (2K x 14 words) |
| Data RAM | 128 bytes |
| Maximum Clock Frequency | 4 MHz |
| Instruction Set | 35 single-word instructions, 14-bit wide |
| Number of I/O Pins | 22 |
| Operating Temperature Range | -40 C to +85 C (industrial, "I" grade) |
| Package | 28-pin SSOP (5.30 mm body) |
| Mounting Type | Surface Mount |
| Watchdog Timer | Yes (internal) |
| Lifecycle Status | Obsolete (per DigiKey listing) |
PIC16LC62BT-04I/SS Pin Configuration
| Pin 1 | RA2/AN2 — Port A bit 2 (analog/digital) |
| Pin 2 | RA3/AN3 — Port A bit 3 (analog/digital) |
| Pin 3 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| Pin 4 | RA5/SS — Port A bit 5 / SPI slave select |
| 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 | VSS — Ground reference |
| Pin 15 | OSC1/CLKIN — Oscillator input / external clock |
| Pin 16 | OSC2/CLKOUT — Oscillator output |
| Pin 17 | RC0 — Port C bit 0 |
| Pin 18 | RC1 — Port C bit 1 |
| Pin 19 | RC2 — Port C bit 2 |
| Pin 20 | RC3 — Port C bit 3 |
| Pin 21 | RC4 — Port C bit 4 |
| Pin 22 | RC5 — Port C bit 5 |
| Pin 23 | RC6 — Port C bit 6 |
| Pin 24 | RC7 — Port C bit 7 |
| Pin 25 | VSS — Ground reference |
| Pin 26 | VDD — Positive supply |
| Pin 27 | RA0/AN0 — Port A bit 0 (analog/digital) |
| Pin 28 | RA1/AN1 — Port A bit 1 (analog/digital) |
Typical Applications
PIC16LC62BT-04I/SS is suitable for 7 applications: Industrial Control Logic Modules, Appliance User Interface Controllers, Sensor Signal Conditioning Nodes, Remote Keyless Entry Transmitters, Automotive Body Control Modules, Smart Card and RFID Reader Interfaces, Battery-Powered Embedded Sensor Nodes.
Industrial Control Logic Modules
The PIC16LC62BT-04I/SS fits industrial control logic because its 22 I/O pins and 4 MHz PIC16 RISC core provide enough deterministic timing for relay drivers, sensor multiplexers, and switch-debounce state machines while the -40C to +85C industrial temperature grade survives factory-floor thermal stress. With 3.5 KB of OTP program memory, the device holds mid-complexity ladder-equivalent logic, and the LC low-voltage rail (down to 2.5 V) enables battery-backed control panels. Designers place the PIC next to opto-isolated I/O and use the internal watchdog timer to recover from brown-outs, giving a robust replacement for legacy CMOS logic ICs.
Recommended
Appliance User Interface Controllers
The PIC16LC62BT-04I/SS works as a user-interface controller in white-goods appliances because its 22 I/O pins directly drive 7-segment displays, keypads, and LED indicators without external glue logic. The 128 bytes of RAM comfortably buffer scan routines and button-debounce state, while 4 MHz provides the response time needed for haptic feedback loops. The OTP memory locks the final UI firmware at production commit, which is desirable for appliance platforms that never require field updates. LC low-voltage operation lets the MCU run from the same 3.3 V rail that powers the LCD backlight driver.
Recommended
Sensor Signal Conditioning Nodes
The PIC16LC62BT-04I/SS conditions slow analog sensor inputs through its digital I/O and software-implemented sigma-delta or pulse-width-modulation reconstruction, given that the bare PIC die in this family typically does not include an on-board ADC for this part number. The 4 MHz CPU executes 1 MIPS of deterministic throughput, sufficient to scan multiple thermistor or resistive sensor channels at low sample rates. The -40C to +85C industrial range covers outdoor sensor enclosures, and the LC low-voltage rail allows battery-powered remote nodes that sleep at microamp-level quiescent current between samples.
Recommended
Remote Keyless Entry Transmitters
The PIC16LC62BT-04I/SS powers single-button or multi-button key-fob transmitters because its LC low-voltage operation (down to 2.5 V) directly supports a single CR2032 coin cell, while 3.5 KB of OTP memory holds encrypted rolling-code transmit routines and 22 I/O pins drive buttons, LEDs, and an RF enable line. The 4 MHz core wakes only when a button is pressed, returning to sleep between transmissions to extend battery life. Designers pair the PIC with an external SAW resonator or PLL-based RF front end at 315 MHz or 433 MHz for sub-$2 BOM cost.
Recommended
Automotive Body Control Modules
The PIC16LC62BT-04I/SS fits automotive body controllers such as mirror-adjust, seat-position, or lighting modules because its 22 I/O pins drive H-bridge FETs and LED strings without external mux logic, and the OTP memory locks the calibration constants at production. The -40C to +85C industrial grade covers cabin-mounted modules; for under-hood or engine-compartment locations designers should upgrade to the automotive-grade -40C to +125C variant. The 4 MHz core is fast enough for PWM-driven lamp dimming and motor control at modest update rates.
Recommended
Smart Card and RFID Reader Interfaces
The PIC16LC62BT-04I/SS serves as the host-side interface for contactless smart-card readers because its deterministic 1 MIPS throughput implements ISO 14443 Type A/B anti-collision state machines in firmware without external protocol ICs. The 22 I/O pins connect directly to the reader antenna-front-end IC's data and clock lines, and 3.5 KB of OTP memory holds the protocol stack and application logic. The LC low-voltage rail lets the MCU share the 3.3 V rail that powers the RF front end, simplifying power-tree design.
Recommended
Battery-Powered Embedded Sensor Nodes
The PIC16LC62BT-04I/SS anchors small battery-powered sensor nodes such as remote thermostats, environmental loggers, and wireless meter readers because its LC low-voltage operation (2.5 V to 5.5 V) runs directly from a pair of AA cells, and the 4 MHz core spends most of its life in sleep mode. The 128 bytes of RAM and 3.5 KB of OTP hold the sensor-scanning, averaging, and low-power-radio wake-up routines. With only 22 active I/O pins available and no internal ADC for this specific die, the MCU pairs with an external low-power delta-sigma ADC and an SPI radio module.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LC62BT-04I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LC62B-04I/SS | PIC16LC622A-04I/SS | PIC16LC620A-04I/SS | PIC16F628A-I/SS | PIC16LF628A-I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SSOP-28 | SSOP-28 - same | SSOP-28 - same | SSOP-28 - same | SSOP-28 - same | SSOP-28 - same |
| Program Memory | 3.5 KB OTP | 3.5 KB OTP - same | 3.5 KB OTP - same | 0.875 KB OTP - smaller (-75%) | 3.5 KB Flash - same | 3.5 KB Flash - same |
| Max Clock Frequency | 4 MHz | 4 MHz - same | 4 MHz - same | 4 MHz - same | 20 MHz - 5x faster | 20 MHz - 5x faster |
| Data RAM | 128 bytes | 128 bytes - same | 128 bytes - same | 96 bytes - smaller (-25%) | 224 bytes - larger (+75%) | 224 bytes - larger (+75%) |
| I/O Pins | 22 | 22 - same | 22 - same | 13 - fewer (-41%) | 16 - fewer (-27%) | 16 - fewer (-27%) |
| Memory Type | OTP | OTP - same | OTP - same | OTP - same | Flash - field-updatable | Flash - field-updatable |
| Supply Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V - same | 2.5 V to 5.5 V - same | 2.5 V to 5.5 V - same | 2.0 V to 5.5 V - wider | 1.8 V to 3.6 V - lower-voltage |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Active | Active |
Key Differentiators
- Obsolete LC low-voltage OTP variant with 22 I/O (vs PIC16F628A-I/SS)
- Highest I/O count among LC OTP SSOP-28 variants (vs PIC16LC620A-04I/SS)
- Tape-and-reel packaging for SMT lines (vs PIC16LC62B-04I/SS)
- Backward-compatible LC low-voltage operation (vs PIC16C62B-04I/SS (standard C, not LC))
Design Notes
The PIC16LC62BT-04I/SS uses One-Time-Programmable memory, which cannot be erased or rewritten after programming. Validate firmware with a Flash-based PIC16F equivalent development part (such as PIC16F628A-I/SS) before committing to OTP volume programming. Programming a buggy OTP die bricks the device and requires physical replacement, so plan a final firmware golden-master sign-off with the programming house before release.
The LC low-voltage rail allows operation down to 2.5 V, but datasheet timing parameters at 4 MHz are guaranteed only down to the minimum VDD. Below 3.0 V the PIC16 mid-range core begins to lose headroom on the oscillator amplifier; place a 100 nF decoupling capacitor within 5 mm of the VDD pin and a bulk 10 uF tantalum or ceramic capacitor on the same rail. Brown-out detection (BOR) is available in configuration bits and should always be enabled in field-deployed designs.
Estimated: at 4 MHz clock and 3.3 V supply, the PIC16LC62BT-04I/SS draws approximately 2 mA active and 1 uA sleep current per the PIC16C6x datasheet family curves. In an industrial -40C to +85C environment the SSOP-28 theta_JA of approximately 90 C/W keeps junction rise well below 1 C even at full active duty cycle, so no heatsink is needed. Designers targeting sealed enclosures should still derate to 70 C max ambient to leave 15 C thermal margin for self-heating under worst-case code-execution loops.
Use a JEDEC-compliant SSOP-28 land pattern with 0.65 mm pitch and at least 0.2 mm annular ring around each pad to satisfy IPC-7351 nominal reflow profiles. Place the MCLR reset pull-up (4.7 kohm to VDD) within 5 mm of pin 1 and route the OSC1/OSC2 traces as a short differential pair with a ground guard ring to keep crystal noise out of the analog portions of the design. Add a 1 Mohm resistor from MCLR to ground for in-circuit programming safety.
When migrating from the obsolete PIC16LC62BT-04I/SS to the Flash-based PIC16F628A-I/SS, the SSOP-28 footprint is identical so no PCB rework is required. However, the PIC16F628A adds a USART and CCP module that the LC62B does not have; reserve those pin assignments in the schematic even if the LC firmware does not use them, to allow forward-compatible firmware recompilation. Verify the ICD programming header footprint matches the F628A's PGD/PGC pinout before tape-out.
Compliance Information
Obsolete part released before modern RoHS/REACH compliance data was standardized for PIC16C OTP products. Compliance status not stated in the provided Verified Web Data; customers requiring compliance evidence should request a manufacturer declaration directly from Microchip.
