PIC16LC62BT-04/SS - 8-Bit 4MHz MCU 3.5KB OTP 28-SSOP | Microchip
MPN: PIC16LC62BT-04/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.1 | $4.10 |
| 10 | $3.78 | $37.80 |
| 100 | $3.42 | $342.00 |
| 500 | $3.05 | $1,525.00 |
| 1,000 | $2.68 | $2,680.00 |
PIC16LC62BT-04/SS Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data memory, and peripheral interfaces onto one piece of silicon. The PIC16LC62B belongs to Microchip's mid-range PIC16 family, positioned between the baseline PIC10/12/16 families and the high-performance PIC18 family. Mid-range PICs use a 14-bit instruction word with 35 single-word instructions, all executing in one instruction cycle except program branches which take two cycles. This core architecture is widely deployed in industrial control, consumer electronics, and embedded sensing applications where deterministic interrupt response and low power consumption matter more than raw compute throughput.
The PIC16LC62BT-04/SS integrates 22 digital I/O pins, supporting up to 22 individually configurable bidirectional I/O channels with programmable weak pull-ups and interrupt-on-change capability on selected pins. On-chip peripherals include a Watchdog Timer with its own on-chip RC oscillator for reliable system recovery, a programmable prescaler, power-saving SLEEP mode, and a 14-bit program counter supporting an 8K x 14 program memory address space. The CMOS process combined with SLEEP mode typically reduces current draw to the microampere range, enabling battery-powered applications.
Typical applications include low-power sensor interface modules, industrial control front-ends, HVAC thermostat controllers, consumer appliance user interfaces, and general-purpose embedded control boards. The combination of OTP memory and SSOP packaging is well matched to production runs of moderate volume where field reprogrammability is not required, providing a lower unit cost than Flash-based equivalents.
When designing with this MCU, note that OTP memory cannot be erased electrically - firmware must be fully validated before programming. Always provide adequate decoupling (100 nF ceramic) adjacent to VDD/VSS pins, and route the MCLR/VPP pin through the standard Microchip in-circuit serial programming (ICSP) interface to enable factory programming and verification.
Drop-in alternatives for PIC16LC62BT-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 PIC16LC62BT-04/SS (same form factor and footprint) — differing in Package, Program Memory Type, Core Architecture, Operating Temperature Range, I/O Pins.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LC62B-04/SS
✅ Drop-In✓ In Stock
$3.55 / Unit
View Datasheet →PIC16LC62BT-04I/SS
✅ Drop-In✓ In Stock
$3.3 / Unit
View Datasheet →PIC16LC62A-04I/SO
✅ Drop-In✓ In Stock
$1.74 / Unit
View Datasheet →PIC16LC62AT-04I/SO
✅ Drop-In✓ In Stock
$2.05 / Unit
View Datasheet →PIC16F628A-I/SS
✅ Drop-In✓ In Stock
$1.41 / Unit
View Datasheet →PIC16F887-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LC62BT-04/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16 mid-range 8-bit RISC |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 3.5 KB (2K x 14) |
| RAM Size | 128 bytes |
| Maximum Clock Frequency | 4 MHz |
| Instruction Word Width | 14 bits |
| Number of Instructions | 35 single-word |
| Supply Voltage Range | 3.0 V to 5.5 V |
| I/O Pins | 22 |
| Package | 28-pin SSOP (5.30 mm body width) |
| Mounting Type | Surface Mount |
| Process Technology | CMOS (low-power LC variant) |
| Watchdog Timer | Yes, with dedicated on-chip RC oscillator |
| Power-Saving SLEEP Mode | Yes |
| ICSP Programming | Yes (In-Circuit Serial Programming) |
PIC16LC62BT-04/SS Pin Configuration
| Pin 1 | MCLR/VPP — Master Clear (reset) input / programming voltage input |
| Pin 2 | RA0 — PORTA bit 0 (bidirectional I/O) |
| Pin 3 | RA1 — PORTA bit 1 (bidirectional I/O) |
| Pin 4 | RA2 — PORTA bit 2 (bidirectional I/O) |
| Pin 5 | RA3 — PORTA bit 3 (bidirectional I/O) |
| Pin 6 | RA4 — PORTA bit 4 (bidirectional I/O, open-drain) |
| Pin 7 | RA5 — PORTA bit 5 (bidirectional I/O) |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKIN — Crystal oscillator input / external clock input |
| Pin 10 | OSC2/CLKOUT — Crystal oscillator output / clock output |
| Pin 11 | RC0 — PORTC bit 0 (bidirectional I/O) |
| Pin 12 | RC1 — PORTC bit 1 (bidirectional I/O) |
| Pin 13 | RC2 — PORTC bit 2 (bidirectional I/O) |
| Pin 14 | RC3 — PORTC bit 3 (bidirectional I/O) |
| Pin 15 | RC4 — PORTC bit 4 (bidirectional I/O) |
| Pin 16 | RC5 — PORTC bit 5 (bidirectional I/O) |
| Pin 17 | RC6 — PORTC bit 6 (bidirectional I/O) |
| Pin 18 | RC7 — PORTC bit 7 (bidirectional I/O) |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply voltage (3.0 V to 5.5 V) |
| Pin 21 | RB0 — PORTB bit 0 (bidirectional I/O, interrupt-on-change) |
| Pin 22 | RB1 — PORTB bit 1 (bidirectional I/O, interrupt-on-change) |
| Pin 23 | RB2 — PORTB bit 2 (bidirectional I/O, interrupt-on-change) |
| Pin 24 | RB3 — PORTB bit 3 (bidirectional I/O, interrupt-on-change) |
| Pin 25 | RB4 — PORTB bit 4 (bidirectional I/O, interrupt-on-change) |
| Pin 26 | RB5 — PORTB bit 5 (bidirectional I/O, interrupt-on-change) |
| Pin 27 | RB6 — PORTB bit 6 (ICSP PGC clock line) |
| Pin 28 | RB7 — PORTB bit 7 (ICSP PGD data line) |
Typical Applications
PIC16LC62BT-04/SS is suitable for 6 applications: Low-Power Sensor Interface Module, Industrial Control Front-End, HVAC Thermostat Controller, Consumer Appliance User Interface, General-Purpose Embedded Control Board, Automotive Accessory Controller.
Low-Power Sensor Interface Module
The PIC16LC62BT-04/SS is ideal for battery-powered sensor interface modules thanks to its low-power CMOS LC process and integrated SLEEP mode that drops current draw to the microampere range. With 22 I/O pins, designers can connect multiple analog or digital sensors (temperature, humidity, motion) directly via the I/O ports, using the Watchdog Timer to wake the MCU periodically from SLEEP for sampling. At 3.0 V minimum supply, the device operates directly from a single lithium coin cell, eliminating boost converter complexity. The 4 MHz clock is sufficient for typical sensor read, ADC conversion, and UART reporting cycles.
Recommended
Industrial Control Front-End
In industrial control front-ends, the PIC16LC62BT-04/SS provides a robust 8-bit MCU core with 22 I/O pins that interface directly to relays, optocouplers, and discrete input switches. The 3.0 V to 5.5 V supply range accommodates 24 V industrial rails after a simple linear regulator, and the CMOS process tolerates the electrical noise typical of factory floor environments. The Watchdog Timer with dedicated RC oscillator ensures reliable recovery from software faults or brown-out events. With 3.5 KB of OTP program memory, the device fits typical control-loop firmware for valve sequencing, motor start/stop, and alarm handling logic.
Recommended
HVAC Thermostat Controller
The PIC16LC62BT-04/SS suits HVAC thermostat controllers requiring reliable 8-bit control with low standby current. Its 22 I/O pins connect directly to keypad scan lines, LCD drivers, temperature sensor inputs, and relay outputs for heating/cooling stage control. The 4 MHz clock easily handles temperature averaging algorithms and on/off hysteresis control loops, while the SLEEP mode keeps quiescent current below typical thermostat battery drain budgets. OTP memory ensures production firmware stability - no accidental field erasure - which is critical in appliances where reliability outweighs reprogrammability.
Recommended
Consumer Appliance User Interface
For consumer appliance user interfaces such as washing machine control panels, microwave keypads, and dishwasher displays, the PIC16LC62BT-04/SS provides ample I/O (22 pins) to scan matrix keypads and drive LED or 7-segment indicators directly. The 3.5 KB OTP program memory holds appliance-specific state machines, button debouncing logic, and timing sequences. Operating from 3.0 V to 5.5 V, the MCU interfaces directly with 5 V indicator LEDs and 3.3 V logic-level displays without level shifters. The 28-SSOP package is small enough to fit behind the appliance control panel alongside the power supply.
Recommended
General-Purpose Embedded Control Board
The PIC16LC62BT-04/SS works well as the central MCU on general-purpose embedded control boards for hobbyist, educational, and prototype projects. The 4 MHz clock speed, 14-bit instruction set, and Microchip's free MPLAB X IDE with XC8 C compiler support a smooth learning curve for engineers transitioning from PIC10/12 to mid-range PIC16 development. The 28-SSOP package is breadboard-compatible via SSOP-to-DIP adapter boards, and the ICSP interface enables easy in-circuit programming without removing the chip. 3.5 KB OTP and 128 bytes RAM support typical demo firmware including LED chasers, UART echo, and PWM motor control.
Recommended
Automotive Accessory Controller
In non-safety automotive accessory applications such as interior lighting controllers, seat heater modules, or auxiliary fan drivers, the PIC16LC62BT-04/SS provides sufficient compute and I/O. Its 3.0 V to 5.5 V supply range tolerates 12 V battery transients when paired with a simple regulator, and the 22 I/O pins interface to FET gate drivers and current-sense amplifiers. While not AEC-Q100 qualified, it is widely used in non-critical aftermarket automotive modules. The Watchdog Timer adds resilience to noisy automotive electrical environments. For safety-critical automotive ECUs, designers should migrate to AEC-Q100-qualified PIC16F or PIC18 equivalents.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LC62BT-04/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LC62B-04/SS | PIC16LC62BT-04I/SS | PIC16LC62A-04I/SO | PIC16F628A-I/SS |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP (5.30 mm) | 28-SSOP (5.30 mm) - same | 28-SSOP (5.30 mm) - same | 28-SOIC (7.50 mm) | 28-SSOP (5.30 mm) - same |
| Program Memory | 3.5 KB OTP | 3.5 KB OTP - same | 3.5 KB OTP - same | 2 KB OTP | 3.5 KB Flash |
| RAM Size | 128 bytes | 128 bytes - same | 128 bytes - same | 128 bytes - same | 224 bytes |
| Maximum Clock Frequency | 4 MHz | 4 MHz - same | 4 MHz - same | 4 MHz - same | 20 MHz |
| Supply Voltage Range | 3.0 V to 5.5 V | 3.0 V to 5.5 V - same | 3.0 V to 5.5 V - same | 3.0 V to 5.5 V - same | 3.0 V to 5.5 V - same |
| I/O Pins | 22 | 22 - same | 22 - same | 22 - same | 16 |
| Memory Type | OTP | OTP - same | OTP - same | OTP - same | Flash (reprogrammable) |
Key Differentiators
- Low-power CMOS LC process technology (vs PIC16C62B-04/SS)
- Wide 3.0 V to 5.5 V supply range supports mixed-voltage designs (vs PIC16F628A-I/SS)
- Larger 3.5 KB OTP memory for moderate-complexity firmware (vs PIC16LC62A-04I/SO)
Design Notes
Estimated: At VDD = 5.0 V and active mode current of approximately 2 mA at 4 MHz, the PIC16LC62BT-04/SS dissipates around 10 mW. In SLEEP mode the LC variant typically draws < 1 uA, making it well suited for battery-powered sensor designs. Always add a 100 nF ceramic decoupling capacitor adjacent to VDD pin 20 and a bulk 10 uF capacitor near the regulator output. For battery applications, gate the supply with a load switch to fully isolate the MCU when not sampling.
OTP program memory cannot be erased electrically - any firmware bug discovered after programming requires scrapping the chip. Always validate firmware on a Flash-based equivalent (such as PIC16F628A-I/SS or PIC16F88-I/SO) before committing to OTP production. Confirm bit-fuse configuration (oscillator mode, Watchdog enable, code protection) matches the application, since OTP devices cannot be reprogrammed to fix configuration errors. Maintain a small Flash inventory for development and qualification testing.
Route the MCLR/VPP pin (pin 1) directly to the ICSP header through a short trace, avoiding long parallel runs near switching nodes. Keep the crystal or resonator within 5 mm of OSC1 (pin 9) and OSC2 (pin 10) with a guard ground pour for noise immunity. Place 100 nF decoupling as close to VDD (pin 20) and VSS (pin 8 and 19) as possible, since the PIC16 mid-range core is sensitive to supply droop during high-frequency I/O switching. Maintain a continuous ground plane beneath the SSOP footprint to reduce EMI.
Compliance Information
Lead-free finish per Microchip manufacturing standards; RoHS, REACH, halogen, and conflict-minerals status not explicitly confirmed in the provided web data and marked as [DATA_NEEDED] where applicable. Not AEC-Q100 qualified - choose PIC16F886T-I/SO or PIC16F887-I/SS for automotive applications.
