PIC16C62BT-20I/ML - 20MHz 8-bit OTP MCU, 3.5KB | Microchip
MPN: PIC16C62BT-20I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.5 | $8.50 |
| 10 | $7.65 | $76.50 |
| 100 | $6.8 | $680.00 |
| 500 | $6.1 | $3,050.00 |
| 1,000 | $5.45 | $5,450.00 |
PIC16C62BT-20I/ML Overview
What is a PIC microcontroller? A PIC microcontroller is a Harvard-architecture, RISC-based programmable logic controller that integrates a CPU, non-volatile program memory (ROM/OTP/Flash), RAM, EEPROM (in some variants), and a rich set of peripherals (timers, ADC, USART, I/O) into a single chip. The PIC® 16C series is Microchip's classic OTP-based 8-bit family, bridging the original 16C5x baseline and the modern Flash-based 16F family. PIC microcontrollers sit within the broader category of microcontrollers → embedded processors → semiconductors → integrated circuits.
Key features of the PIC16C62BT-20I/ML include 35 single-word instructions (all single-cycle except program branches, which take two cycles), a 14-bit instruction word, and an 8-level deep hardware stack. Peripherals include a Capture/Compare/PWM (CCP) module, an 8-bit timer/counter, a watchdog timer, and up to 22 digital I/O pins. Its CMOS-OTP process yields very low power consumption (typically <2 mA at 5V/4 MHz), making it well-suited to battery-powered and industrial-control applications.
Technically, the PIC16C62B employs a high-performance RISC CPU core with separate program and data buses (Harvard architecture), enabling simultaneous instruction fetch and operand access. The 14-bit wide program memory bus allows each instruction to include a literal operand, while the 8-bit data bus provides byte-level RAM and register access. This dual-bus design is the foundation of PIC's deterministic instruction timing.
Typical applications include industrial control logic, sensor-interface front-ends, motor-control signal generation (using the CCP/PWM), low-cost consumer appliances, automotive body modules (industrial temperature grade only), and embedded control in long-life products where post-programming code changes are not required. The OTP nature makes the PIC16C62B ideal for high-volume production where code is finalized.
When designing with the PIC16C62BT-20I/ML, note that OTP devices cannot be re-programmed in-circuit - firmware must be verified on a windowed (JW) or Flash equivalent (PIC16F62x) before production commits. The 28-QFN exposed pad requires adequate PCB thermal dissipation on the central e-pad for full electrical and thermal performance.
This page synthesizes distributor availability, drop-in PIC family alternatives, package-specific pinouts, and practical design notes not always found in the original manufacturer datasheet.
Drop-in alternatives for PIC16C62BT-20I/ML — 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 PIC16C62BT-20I/ML (same form factor and footprint) — differing in Instruction Cycle Time, Package, Peripherals, Program Memory Size, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C62B-20I/SP
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →PIC16C62B-20I/ML
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$4.21 / Unit
View Datasheet →PIC16C62BT-20I/ML Maximum Ratings & Electrical Characteristics
| Family | PIC® 16C |
| Series | PIC16C62B |
| Core Size | 8-bit |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 3.5 KB (2K × 14) |
| RAM Size | 128 bytes |
| Maximum Clock Frequency | 20 MHz |
| Instruction Cycle Time | 200 ns (at 20 MHz) |
| Operating Temperature Range | -40°C to +85°C (Industrial, "I") |
| I/O Pins | 22 |
| Package | 28-VQFN (ML) 6×6 mm, exposed thermal pad |
| Mounting Type | Surface Mount |
| Speed Grade | 20 MHz ("20" in MPN) |
| Peripherals | CCP, Timer, Watchdog Timer |
| Architecture | RISC, Harvard |
PIC16C62BT-20I/ML Pin Configuration
| Pin 1 | RA2/AN2 — Port A bit 2 / Analog input 2 |
| Pin 2 | RA3/AN3 — Port A bit 3 / Analog input 3 |
| Pin 3 | RA4/T0CKI — Port A bit 4 / Timer 0 clock input |
| Pin 4 | RA5/AN4 — Port A bit 5 / Analog input 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 voltage |
| Pin 15 | OSC2/CLKOUT — Oscillator output / Clock output |
| Pin 16 | OSC1/CLKIN — Oscillator input / Clock input |
| Pin 17 | RC0 — Port C bit 0 |
| Pin 18 | RC1 — Port C bit 1 |
| Pin 19 | RC2/CCP1 — Port C bit 2 / Capture-Compare-PWM 1 |
| 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 voltage |
| Pin 27 | RA0/AN0 — Port A bit 0 / Analog input 0 |
| Pin 28 | RA1/AN1 — Port A bit 1 / Analog input 1 |
Typical Applications
PIC16C62BT-20I/ML is suitable for 6 applications: Industrial Control Logic, Sensor Interface Front-End, Motor Control PWM Generation, Low-Cost Consumer Appliances, Automotive Body Electronics, Embedded Control in Long-Life Products.
Industrial Control Logic
The PIC16C62BT-20I/ML fits industrial control logic with its 8-bit RISC core, 35-instruction set, and 20 MHz / 200 ns deterministic instruction timing for repeatable control loops. The 22 I/O pins support multiple sensor inputs and actuator outputs, while the integrated CCP module generates timing pulses for solenoid or relay sequencing. Industrial -40°C to +85°C temperature rating suits factory-floor enclosures, and OTP memory locks firmware against field tampering. Typical use replaces discrete logic ICs in machine-control boards with a single programmable MCU.
Recommended
Sensor Interface Front-End
For sensor-interface front-ends, the PIC16C62BT-20I/ML's 128 bytes of RAM and 22 I/O pins allow direct connection to multiple analog sensors through external ADCs or comparator circuits. Its low CMOS power consumption (typically <2 mA at 5V/4 MHz) extends battery life in remote sensor nodes. The 14-bit instruction width and single-cycle execution provide deterministic sampling timing for temperature, pressure, and humidity transducers. The industrial temperature range suits outdoor and process-control sensor deployments.
Recommended
Motor Control PWM Generation
The PIC16C62BT-20I/ML's integrated Capture/Compare/PWM (CCP) module produces hardware PWM signals for DC motor speed control, LED dimming, or small brushless motor commutation. At 20 MHz clock, the PWM timebase offers fine resolution for low-RPM motor control loops, while the 22 I/O pins interface to H-bridge driver ICs and Hall-effect sensors. The industrial -40°C to +85°C range tolerates underhood and motor-housing thermal environments. The OTP memory ensures the motor-control firmware cannot be accidentally overwritten in the field.
Recommended
Low-Cost Consumer Appliances
Consumer appliances such as washing-machine timers, microwave ovens, and small kitchen gadgets benefit from the PIC16C62BT-20I/ML's low unit cost in volume, 8-bit performance, and OTP memory that prevents end-user firmware tampering. The 20 MHz execution speed handles user-interface scanning, display multiplexing, and timer-driven cooking cycles with margin. The 28-QFN compact package enables slim PCB layouts behind appliance control panels, while the industrial temperature range accommodates heat-generating enclosures. Watchdog timer prevents appliance lockup in unattended operation.
Recommended
Automotive Body Electronics
Within automotive body modules - door-lock controllers, mirror adjusters, seat-position memories - the PIC16C62BT-20I/ML's industrial -40°C to +85°C range and OTP memory fit cost-sensitive non-safety-critical subsystems. The 22 I/O pins drive multiple relay coils and read switch contacts, while the CCP module generates timing pulses for window-lift and wiper-control waveforms. The 28-QFN's small footprint fits behind door trim panels where PCB space is constrained. For underhood applications requiring -40°C to +125°C, choose an "E" extended-temperature PIC16C variant or migrate to PIC16F with AEC-Q100 qualification.
Recommended
Embedded Control in Long-Life Products
Long-life products such as industrial sensors, metering devices, and infrastructure monitoring equipment benefit from the PIC16C62BT-20I/ML's mature OTP silicon with multi-decade production availability. Once firmware is finalized and qualified, OTP memory eliminates the field-update liability that Flash-based MCUs introduce in safety-critical installations. The 20 MHz execution supports communication protocol handling and periodic measurement logging. The QFN package withstands high-vibration environments when properly soldered with the exposed thermal pad bonded to PCB ground.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C62BT-20I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C62B-20I/SP | PIC16C62B-20I/ML | PIC16C62AT-20I/SO | PIC16C62B-04I/SS |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-VQFN (ML) 6×6 mm | 28-SPDIP (SP) - NOT same footprint | 28-VQFN (ML) - same | 28-SOIC (SO) - NOT same footprint | 28-SSOP (SS) - NOT same footprint |
| Program Memory | 3.5 KB OTP | 3.5 KB OTP - same | 3.5 KB OTP - same | 3.5 KB OTP - same | 3.5 KB OTP - same |
| RAM | 128 bytes | 128 bytes - same | 128 bytes - same | 128 bytes - same | 128 bytes - same |
| Max Clock Speed | 20 MHz | 20 MHz - same | 20 MHz - same | 20 MHz - same | 4 MHz - lower |
| Operating Temperature | -40°C to +85°C (I) | -40°C to +85°C (I) - same | -40°C to +85°C (I) - same | -40°C to +85°C (I) - same | -40°C to +85°C (I) - same |
| I/O Pins | 22 | 22 - same | 22 - same | 22 - same | 22 - same |
| CCP Module | Yes | Yes | Yes | Yes | Yes |
| Memory Type | OTP | OTP - same | OTP - same | OTP - same | OTP - same |
Key Differentiators
- Same-die alternative in tube packaging (vs PIC16C62B-20I/ML (non-T))
- True tape-and-reel factory format (vs PIC16C62B-20I/ML (tube))
- Industrial temperature grade confirmed (vs PIC16C62B-20E/ML (extended grade))
Design Notes
The PIC16C62BT-20I/ML's 28-VQFN package includes a central exposed thermal pad that MUST be soldered to the PCB ground plane for both electrical reference and thermal dissipation. Recommended land pattern is the standard 28-QFN 6×6 mm pad layout with thermal vias (0.3 mm diameter, 1.0 mm pitch) under the center pad connecting top-side ground pour to inner ground plane. Missing the center-pad solder joint can cause intermittent operation, ESD susceptibility, and thermal failure at elevated ambient temperatures.
OTP (One-Time Programmable) memory cannot be erased or rewritten. Verify all firmware on a JW windowed prototype, a Flash-equivalent PIC16F62x, or a development board BEFORE committing to OTP production parts. Field firmware bugs in OTP parts require board rework or replacement - an expensive mistake in deployed products. Always order at least 10-20% spare PIC16C62B units to cover development yield losses, since each programmed chip that fails verification cannot be recovered.
The PIC16C62BT-20I/ML draws approximately 2 mA typical at 5V/4 MHz, scaling roughly linearly with clock frequency up to ~10 mA at 20 MHz/5V. Add a 100 nF decoupling capacitor within 5 mm of each Vdd pin (the PIC16C62B has two Vdd pins on the 28-QFN package) and a single 10 µF bulk capacitor near the IC. For low-power sleep modes, verify the exact sleep current specification against the Microchip datasheet electrical characteristics table - some PIC16C62B revisions had higher-than-expected sleep current at extended temperature.
Compliance Information
RoHS, REACH, lead-free, halogen-free, and conflict-mineral status were not explicitly stated in the verified distributor data. Industrial ("I") temperature grade is not the same as AEC-Q100 automotive qualification - the PIC16C62BT-20I/ML is suitable for non-safety automotive cabin applications but not AEC-Q100 systems. For authoritative compliance certifications, consult Microchip's product environmental compliance page or request a certificate directly from Microchip.
