PIC16C662T-20E/L - 8-bit OTP MCU, 20MHz, 44-PLCC | Microchip
MPN: PIC16C662T-20E/L β End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.42 | $8.42 |
| 10 | $7.58 | $75.80 |
| 100 | $6.79 | $679.00 |
| 500 | $6.05 | $3,025.00 |
| 1,000 | $5.4 | $5,400.00 |
PIC16C662T-20E/L Overview
A PIC microcontroller (Programmable Interface Controller) is a compact, low-cost RISC-based computing device that integrates a CPU, memory (program ROM/RAM), and programmable peripherals onto a single silicon die. Within the broader taxonomy, PIC16C662 belongs to the 8-bit microcontroller -> microcontroller unit (MCU) -> embedded controller -> semiconductor hierarchy. The PIC16C family uses a Harvard architecture with separate program and data buses, enabling single-cycle instruction execution and deterministic interrupt response - a hallmark of Microchip's mid-range MCU lineup.
Key features of the PIC16C662T-20E/L include 7KB OTP program memory (4K x 14-bit words), 176 bytes of general-purpose RAM, 33 digital I/O pins, an integrated analog-to-digital converter, and multiple timer/counter peripherals. The 20 MHz oscillator provides 200 ns instruction cycle time, supporting responsive control loops in real-time systems. The 44-pin PLCC package offers socket-compatible mounting suitable for legacy industrial and automotive designs.
The device employs a RISC instruction set with only 35 single-word instructions, simplifying firmware development and accelerating time-to-market. Internal peripherals typically include capture/compare/PWM modules, a USART for asynchronous serial communication, and synchronous serial port (SSP) support for SPI/I2C. Brown-out reset (BOR) and watchdog timer (WDT) enhance system reliability in noisy electrical environments.
Typical applications include industrial control systems, automotive body and chassis electronics, appliance controllers, HVAC interface modules, and legacy embedded products requiring field-proven OTP-based firmware storage. The automotive temperature grade (-40C to +125C) and OTP memory make it especially suitable for cost-sensitive high-volume production where in-circuit reprogramming is unnecessary.
When designing with this MCU, allocate sufficient PCB real estate for the 44-pin PLCC socket footprint (16.59 x 16.59 mm land pattern with J-lead pads). The OTP memory requires one-time programming - design firmware carefully and validate on windowed or flash-based equivalents first. Ensure oscillator start-up time and POR/BOR timing match your application's power-rail profile.
This page synthesizes distributor pricing from DigiKey/Mouser, drop-in alternatives from the same PIC16C66x family, and practical design notes not consolidated in the Microchip datasheet. Cross-brand flash equivalents are noted where applicable for designers needing in-circuit reprogrammability.
Drop-in alternatives for PIC16C662T-20E/L β 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 PIC16C662T-20E/L (same form factor and footprint) β differing in Instruction Set, Mounting Type, Package, Program Memory Type, Temperature Grade.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16C662T-10E/L
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16C662-10E/L
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$9.85 / Unit
View Datasheet βPIC16C662T-20E/L Maximum Ratings & Electrical Characteristics
| Core | PIC16C 8-bit RISC |
| Program Memory Type | OTP (One-Time-Programmable) |
| Program Memory Size | 7 KB (4K x 14 words) |
| RAM Size | 176 bytes |
| Maximum Clock Frequency | 20 MHz |
| Instruction Cycle Time | 200 ns |
| I/O Pins | 33 |
| ADC | Integrated (exact) |
| Package | 44-pin PLCC (16.59 x 16.59 mm) |
| Terminal Form | J BEND (J-lead) |
| Package Code | QCCJ |
| Mounting Type | Surface Mount |
| Temperature Grade | Automotive |
| Operating Temperature | -40C to +125C |
| Instruction Set | 35 single-word instructions |
| Architecture | Harvard (separate program/data buses) |
PIC16C662T-20E/L qccj Pin Configuration Guide
Pin configuration for PIC16C662T-20E/L (qccj package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for PIC16C662T-20E/L.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC16C662T-20E/L is suitable for 6 applications: Automotive Body and Chassis Controllers, Industrial Control and HMI Panels, Appliance Control Modules, Legacy Embedded Product Sustainment, Security and Access Control Panels, Consumer Electronics Remote and Sensor Hubs.
Automotive Body and Chassis Controllers
The PIC16C662T-20E/L's automotive temperature grade (-40C to +125C), OTP memory cost advantage, and 33 I/O pins make it well suited for automotive body controllers (window lift, seat control, mirror adjustment) and chassis modules where firmware is fixed and unit cost dominates the BOM. The 20 MHz clock delivers responsive control loops for motor PWM and switch debouncing. With 7KB of program memory, developers can implement CAN-style software protocols, sensor conditioning, and actuator drivers on a single chip. Unlike flash parts, the OTP cost is 20-30% lower at volume, which is critical for parts shipping >100K/year. The 44-pin PLCC package supports socketed field service for legacy vehicle platforms.
Recommended
Industrial Control and HMI Panels
Industrial control panels, HVAC interface modules, and machine-operator HMI terminals benefit from the PIC16C662T-20E/L's robust peripheral set: integrated ADC for analog sensor input (temperature, pressure, flow), PWM outputs for motor or valve control, and USART for communication with upstream PLCs or display controllers. The 33 I/O pins accommodate keypads, LED indicators, and relay drivers without external I/O expanders. Industrial-grade temperature tolerance and brown-out reset ensure reliable operation on factory power rails with significant noise and sag. The Harvard architecture and deterministic interrupt latency provide the predictable timing required for safety interlocks and alarm handling in process automation.
Recommended
Appliance Control Modules
White goods and small appliance controllers (washing machines, dishwashers, microwave ovens, coffee machines) are a classic application for the PIC16C662T-20E/L because OTP memory drives down production cost while the 20 MHz core handles user-interface scanning, motor control, and sensor processing in real time. The 176 bytes of RAM accommodate state machines for wash cycles or cooking profiles without external memory. Integrated ADC channels monitor thermistors, water level sensors, and motor current for closed-loop control. The 33 I/O pins drive 7-segment displays, keypads, buzzer, relay coils, and triac interfaces directly. The automotive-grade temperature spec survives the heat envelope behind a dishwasher motor or inside a microwave oven chassis.
Recommended
Legacy Embedded Product Sustainment
For manufacturers maintaining fielded products with installed PIC16C662T-20E/L units, the OTP memory and identical-package PLCC-44 form factor enable drop-in service replacements without redesigning the PCB. Field service technicians can swap a programmed PIC16C662T-20E/L into a 44-pin PLCC socket on legacy boards. The 7KB OTP capacity supports continued production of working firmware images for warranty repairs. While new designs should migrate to flash-based PIC16F662, sustainment programs for medical, military, or industrial equipment with 10-20 year lifecycles continue to source this part for service stock. The automotive temperature grade ensures compatibility with fielded units exposed to harsh environments.
Recommended
Security and Access Control Panels
Access control keypads, alarm panel keypads, and small security-system controllers use the PIC16C662T-20E/L for its low cost, robust I/O count, and OTP code security. The 33 I/O pins support 4x4 keypads, multiple LED zone indicators, relay outputs for door strikes, and serial links to central panels. With 7KB of program memory, the device can run keypad scan algorithms, PIN validation, tamper detection, and event logging. The Harvard architecture's deterministic interrupt response ensures prompt alarm-trigger handling. OTP memory provides inherent code protection - once programmed, the firmware cannot be read back, making reverse engineering of proprietary security algorithms more difficult.
Recommended
Consumer Electronics Remote and Sensor Hubs
Universal remote controls, IR/RF sensor hubs, and consumer peripherals can leverage the PIC16C662T-20E/L's 20 MHz performance and 33 I/O pins to handle multi-protocol decoding, button scanning, and status LED driving in a single chip. The integrated ADC supports battery voltage monitoring for low-battery alerts. With 176 bytes of RAM, the MCU can buffer multi-byte IR protocols (RC5, NEC, Sony SIRC) without external memory. OTP memory keeps the bill-of-materials cost under $1 in volume, enabling $10 retail price points for universal remotes. The automotive temperature spec ensures reliability in any indoor environment.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C662T-20E/L β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C662T-10E/L | PIC16C662-10E/L | PIC16C662T-10I/PQ | PIC16C662-20E/PT | PIC16C662-20I/P | PIC16C662-04I/P |
|---|---|---|---|---|---|---|---|
| Package | 44-PLCC (16.59x16.59 mm) | 44-PLCC - same | 44-PLCC - same | 44-PQFP - different | 44-TQFP - different | 40-PDIP - different | 40-PDIP - different |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Clock Frequency | 20 MHz | 10 MHz | 10 MHz | 10 MHz | 20 MHz | 20 MHz | 4 MHz |
| Program Memory | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP |
| RAM Size | 176 bytes | 176 bytes | 176 bytes | 176 bytes | 176 bytes | 176 bytes | 176 bytes |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 | 33 |
| Temperature Grade | Automotive (-40C to +125C) | Automotive | Extended | Industrial | Extended | Industrial | Industrial |
| Memory Type | OTP | OTP | OTP | OTP | OTP | OTP | OTP |
| Core Architecture | 8-bit PIC RISC | 8-bit PIC RISC | 8-bit PIC RISC | 8-bit PIC RISC | 8-bit PIC RISC | 8-bit PIC RISC | 8-bit PIC RISC |
Key Differentiators
- OTP memory for low per-unit cost at high volume (vs PIC16F662-I/L (flash equivalent))
- Automotive temperature grade (-40C to +125C) as standard (vs PIC16C662T-10I/L (industrial grade))
- 44-pin PLCC socket-compatible legacy footprint (vs PIC16C662-20E/PT (TQFP-44))
Design Notes
Estimated: The 44-pin PLCC package (16.59 x 16.59 mm) requires a J-lead PCB land pattern with approximately 1.0 mm lead pitch. Use a PLCC socket (e.g., 3M 8444-ND) for development boards to enable easy OTP device swaps during firmware validation. For production boards, solder the PLCC directly with standard J-lead reflow profiles (peak 245C, 60 sec above 220C) following JEDEC J-STD-020 MSL classification.
Estimated: The PIC16C662T-20E/L operates from 4.0V to 6.0V (typical 5V) supply; check datasheet exact voltage range for production. Place a 100 nF decoupling capacitor as close as possible to the VDD pin and a 10 uF bulk capacitor at the board supply entry. The brown-out reset (BOR) circuit prevents code execution at marginal voltages - configure BOR voltage threshold in configuration bits to match your application's power-rail profile.
OTP memory cannot be erased or rewritten - once programmed, the firmware is permanent. Always validate firmware on a flash-based equivalent (PIC16F662-I/L) before committing to PIC16C662T-20E/L for production programming. Use windowed PIC16C662 variants for prototype validation if the flash part is not available, then transfer the validated hex file to OTP for production. Plan programming lead time (typically 2-4 weeks at volume) into your production schedule.
Estimated: Place the external crystal/ceramic resonator within 5 mm of the OSC1/OSC2 pins with short, symmetrical traces to minimize parasitic capacitance. Use a series resistor (typically 100 ohm to 1 kohm) with ceramic resonators to dampen overdrive. For noise-sensitive analog inputs (ADC), route analog signals away from digital switching traces and use a ground guard ring around sensitive analog traces. MCLR pin requires a 10 kohm pull-up to VDD for normal operation.
Compliance Information
RoHS and REACH compliance per DigiKey product listing. Automotive temperature grade (-40C to +125C) is standard but not formally AEC-Q100 qualified; for AEC-Q100 qualified equivalent, refer to PIC16F662 family. Lead-free reflow compatible per JEDEC J-STD-020.
