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PIC16C662-10/PT - 8-Bit OTP MCU, 7KB EPROM, 33 I/O | Microchip
PIC16C662-10/PT

PIC16C662-10/PT - 8-Bit OTP MCU, 7KB EPROM, 33 I/O | Microchip

The Microchip Technology PIC16C662-10/PT is a one-time-programmable (OTP) 8-bit CMOS microcontroller based on Microchip's PIC architecture, featuring 7KB of EPROM program memory, 176 bytes of RAM, and 33 digital I/O lines, all packaged in a 44-pin TQFP (PT) surface-mount form factor. The device executes instructions in a single 200 ns cycle when clocked at 20 MHz, supports an operating voltage range of 3.0 V to 5.5 V, and integrates two analog comparators with programmable on-chip reference, a 12-bit instruction word, and 35 single-word instructions. Background context: An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, digital I/O peripherals and often analog blocks on one die. Within the broader taxonomy, PIC16C662 belongs to the PIC16 family, which itself sits inside the 8-bit MCU category, the Microcontroller sub-family of Integrated Circuits (ICs). OTP EPROM memory denotes a programmable read-only cell technology that can be written once with a high-voltage programmer but cannot be electrically erased, making it well suited to high-volume production where firmware is finalized. Key differentiating specifications include the 200 ns instruction cycle, 8-level hardware stack, 14-bit wide instruction word, integrated analog comparators with programmable voltage reference, Power-on Reset (POR), Brown-out Reset (BOR), Watchdog Timer (WDT) with its own on-chip RC oscillator, and In-Circuit Serial Programming (ICSP) capability. The 44-pin TQFP package exposes up to 33 I/O pins and provides 5 MIPS sustained throughput at 20 MHz clock, giving designers a compact footprint for cost-sensitive embedded designs. The PIC16C662 employs a RISC-style Harvard architecture with separate program and data buses, allowing instruction fetch and operand access to occur in the same cycle. The internal oscillator and PLL-free design simplify BOM cost, while the dual analog comparators eliminate the need for external op-amps in signal-conditioning tasks such as battery monitoring or threshold detection. Typical applications include appliance control, automotive body electronics, industrial sensor interfaces, smart card readers, battery chargers, LED lighting controllers, and embedded control boards. The integrated analog comparators make it well suited to threshold detection without external components. When designing with this device, note that OTP memory cannot be field-updated; use the PIC16F flash-based equivalent (e.g., PIC16F914-I/PT) if firmware iteration is expected in production. ICSP programming still requires a high-voltage (typically 13 V) VPP pulse, so plan board layout to expose PGC, PGD and VPP test points. This page synthesizes distributor pricing, package-compatible drop-in alternatives sourced from Microchip's own cross-reference tooling, and practical design notes not found in the standalone datasheet.

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PIC16C662-10E/L - 8-bit OTP MCU, 7KB EPROM, 44-PLCC | Microchip
PIC16C662-10E/L

PIC16C662-10E/L - 8-bit OTP MCU, 7KB EPROM, 44-PLCC | Microchip

The Microchip Technology PIC16C662-10E/L is a high-performance, CMOS OTP-based 8-bit microcontroller built on Microchip's proven PIC architecture, integrating 7 KB of EPROM program memory (4K x 14), a 10 MHz operating frequency with 200 ns instruction cycle, and a rich peripheral set including analog comparators, into a 44-pin PLCC (J-lead) package designated "L". The "-10E" speed/temperature grade specifies 10 MHz operation across the -40C to +125C extended automotive temperature range, making it qualified for under-hood and harsh-environment automotive applications. The "C" suffix denotes the EPROM windowless OTP (One-Time-Programmable) variant optimized for volume production. A PIC (Peripheral Interface Controller) microcontroller is a RISC-based embedded processor that combines a CPU core, program memory, RAM, and peripherals on a single CMOS die. Within the broader taxonomy, PIC MCUs sit under 8-bit microcontrollers -> microcontrollers -> microcontrollers/MCU -> embedded processors -> semiconductors. The PIC16C family, originally introduced in the early 1990s, established the baseline for modern PIC instruction sets with only 35 single-word instructions, an 8-level hardware stack, and a Harvard bus architecture that separates program and data paths for deterministic single-cycle execution. Key features of the PIC16C662-10E/L include: 7 KB EPROM program memory, 192 bytes of general-purpose RAM, up to 33 digital I/O pins, multiple 8-bit and 16-bit timer/counter modules, dual analog comparators with programmable reference, a synchronous serial port (SSP) supporting SPI and I2C master/slave, configurable watchdog timer with on-chip RC oscillator, and brown-out reset protection. The device operates from 2.5 V to 6.0 V across commercial, industrial, and automotive temperature grades, providing flexibility for battery-powered and 5 V logic designs. The PIC16C662-10E/L uses a RISC CPU with two-stage pipeline architecture, executing each instruction in a single 200 ns cycle at 10 MHz oscillator. Its 14-bit-wide instruction word, separate 8-bit data bus, and 8-level deep hardware stack provide deterministic interrupt latency critical for real-time control. The integrated dual analog comparators enable closed-loop feedback systems such as power supply regulation, sensor threshold detection, and motor current monitoring without external analog components. Typical applications span automotive body and chassis ECUs (climate control, instrument clusters, lighting modules), industrial process control (programmable logic controllers, motor drives), consumer appliances (washing machines, microwave ovens), and white-goods user-interface boards. The extended temperature grade and OTP memory make the device well suited for high-volume production runs where firmware is finalized at the time of manufacture. When designing with this part, ensure that OTP programming is performed with a Microchip-compatible device programmer before the device is sealed. For in-circuit reprogramming or field firmware updates, consider the Flash-based PIC16F series equivalents (e.g., PIC16F877) which retain pin-to-pin compatibility in many cases. This page synthesizes distributor stock data, pin-compatible drop-in alternatives, and practical automotive/industrial design notes that are not consolidated in any single manufacturer datasheet.

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PIC16C662-10E/PQ - 8-bit OTP MCU, 7KB, 33 I/O, 44-MQFP | Microchip
PIC16C662-10E/PQ

PIC16C662-10E/PQ - 8-bit OTP MCU, 7KB, 33 I/O, 44-MQFP | Microchip

The Microchip Technology PIC16C662-10E/PQ is an 8-bit OTP (One-Time Programmable) CMOS microcontroller in the PIC16CXX family, delivering 7KB of program memory and 176 bytes of RAM with 33 digital I/O pins, housed in a 44-pin Metric Quad Flat Pack (MQFP, 10x10 mm) package. It operates at a maximum clock speed of 10 MHz across a 4.0 V to 6.0 V supply range and is rated for the -40C to +125C extended industrial temperature window, as indicated by the -10E designator in the part number. What is an OTP microcontroller? An OTP microcontroller is a variant of flash-based MCUs that uses a one-time-programmable memory cell array. The on-chip program memory can be written exactly once using a device programmer, after which the bit cells become read-only. OTP parts lower die cost and are used in mature, high-volume, cost-sensitive products where code revision is unnecessary, such as appliance controls, automotive sub-modules, and consumer white goods. Key features include 7KB EPROM program memory, 176 bytes of data RAM, a 14-bit instruction word, hardware USART with SPI and I2C master/slave modes, an 8-bit A/D converter with up to 8 channels, three timers (Timer0/Timer1/Timer2), a watchdog timer with on-chip RC oscillator, and a programmable code-protection scheme. The 33 I/O pins can source/sink up to 25 mA per pin, suitable for direct LED and relay drive in many applications. Architecturally, the PIC16C662 belongs to the mid-range PIC16 family and uses a 14-bit RISC instruction set with single-cycle execution except for branch instructions. The device integrates a high-endurance EPROM cell that retains code for more than 10 years, and the on-chip brown-out reset and power-on reset blocks simplify external reset hardware. The MQFP-44 package supplies ample ground and power pins to keep digital switching noise isolated from sensitive analog blocks. Typical applications include industrial control panels, automotive body and chassis modules, HVAC thermostat controls, security and alarm panels, and appliance motor controllers. The wide 4.0-6.0 V supply tolerance accommodates unregulated 5 V rails that are common in industrial and automotive environments. When designing with this device, ensure your programmer supports OTP-mode programming and that code is fully validated before final programming, because the memory cannot be erased afterward. Decouple VDD with at least 0.1 uF ceramic and 10 uF tantalum close to the supply pins, and reserve MCLR as a reset input if in-circuit programming is required. This page synthesizes current distributor stock and pricing, same-package drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C662-10E/PT - 8-Bit 10MHz 7KB OTP MCU 44-TQFP | Microchip
PIC16C662-10E/PT

PIC16C662-10E/PT - 8-Bit 10MHz 7KB OTP MCU 44-TQFP | Microchip

The Microchip Technology PIC16C662-10E/PT is a member of the PIC16C6x family of 8-bit CMOS microcontrollers with EPROM/OTP program memory, packaged in a 44-pin TQFP (10x10 mm). The "-10" speed grade denotes a 10 MHz maximum clock frequency and the "E" suffix indicates the Extended industrial temperature range (-40C to +125C), making this part suitable for harsh-environment embedded designs. The device integrates 7KB of OTP program memory (organized as 4K x 14) and approximately 176 bytes of general-purpose RAM. An OTP (One-Time Programmable) microcontroller is a class of non-volatile programmable logic device that can be written only once after manufacture - a cost-optimized solution for high-volume, mature products where field firmware updates are not required. Within the broader taxonomy, OTP MCUs sit between mask-ROM devices (lowest cost, fixed code) and Flash-based MCUs (re-programmable); they share the same PIC16C core architecture, instruction set, and peripheral set as their Flash equivalents. PIC16C6x parts are widely used in industrial control, appliance, and automotive subsystems where production firmware is frozen. Key features of the PIC16C662-10E/PT include 33 digital I/O pins, an integrated analog comparator, a watchdog timer, a 8-bit timer/counter (Timer0) and an 8-bit timer/counter with prescaler (Timer1), plus capture/compare/PWM modules. The device also supports an external oscillator, low-power SLEEP mode, and in-circuit serial programming (ICSP) via the ICSP pins. Operating voltage ranges from 3.0 V to 6.0 V (per the PIC16C66x datasheet family). Typical applications include industrial control panels, white-goods motor control, security keypads, HVAC controllers, and automotive body-electronics modules. The extended temperature range and EPROM-based memory make this part a robust choice for long-lifecycle, fixed-code designs. Engineers designing with this device should review the PIC16C66x datasheet family for oscillator configuration, current consumption per MHz, and the I/O pin mapping for the 44-TQFP package.

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PIC16C662-10I/L - 7KB OTP 8-bit MCU 10MHz 44-PLCC | Microchip
PIC16C662-10I/L

PIC16C662-10I/L - 7KB OTP 8-bit MCU 10MHz 44-PLCC | Microchip

The Microchip Technology PIC16C662-10I/L is an 8-bit OTP (One-Time Programmable) CMOS microcontroller from the PIC16C family, delivering 7 KB of program memory (4K x 14), 176 bytes of RAM, and 33 I/O pins in a 44-lead PLCC (J-Lead) package operating at up to 10 MHz from a 5 V supply. What is a PIC16C microcontroller? The PIC16C is Microchip's classic mid-range OTP (One-Time Programmable) 8-bit microcontroller family, sitting between the baseline PIC10/12/16 and the flash-based PIC18 families. PIC16C devices are widely used in cost-sensitive industrial controls, appliance, automotive body electronics and legacy designs that ship in high volume where mask-ROM/OTP economics outweigh flash reprogrammability. Within that hierarchy, PIC16C662 belongs to the PIC16C6x subgroup with integrated peripherals and the larger memory options (7 KB ROM/OTP) of the family. Key features include 13 interrupt sources, a Harvard RISC architecture with 14-bit instructions and 35 single-cycle instructions, a watchdog timer with on-chip RC oscillator, two 8-bit timers and one 16-bit timer/counter, an 8-bit parallel slave port, a USART with enhanced addressing, and an 8-channel 8-bit ADC. Operating current is approximately 2 mA at 5 V and 10 MHz. The 44-pin PLCC package supports commercial, industrial and (where qualified) extended temperature grades, with the -10I/L suffix denoting 10 MHz operation in the industrial temperature range (-40C to +85C). Architecturally, PIC16C662 uses a 14-bit wide instruction word, separate code and data buses (Harvard), and an 8-level deep hardware stack. The OTP program memory is one-time writable by the user, requiring a UV-windowed JW package or a gang programmer for development; production programming is done in-circuit or by socket. Typical applications include industrial control and sensor front-ends, appliance control boards, HVAC and pump controllers, automotive body and interior modules, security and fire-alarm panels, and white-goods user interfaces. The 33 I/O and the 8-channel ADC make it especially useful for mixed-signal subsystems with several analog inputs and digital I/O expansion. When designing with PIC16C662, mind that OTP precludes in-field firmware updates; if you anticipate firmware revisions, budget for a flash-based PIC16F or PIC18 replacement now, or use a JW windowed device only for development. Industrial temperature operation also requires verification of the exact operating range and decoupling per the manufacturer datasheet typical application circuit. This page consolidates distributor pricing, drop-in PIC16C662 alternative MPNs sharing the same 44-pin PLCC package, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C662-10I/P - 8-bit OTP MCU, 7KB ROM, 176B RAM, 33 I/O | Microchip
PIC16C662-10I/P

PIC16C662-10I/P - 8-bit OTP MCU, 7KB ROM, 176B RAM, 33 I/O | Microchip

The Microchip Technology PIC16C662-10I/P is a 200 ns instruction-execution, 35 single-word instruction CMOS OTP-based 8-bit microcontroller that packs Microchip's PIC architecture into a 40-pin PDIP package. It integrates 7 KB of OTP program memory, 176 bytes of data RAM, 33 digital I/O lines, and operates at up to 10 MHz from a single 5 V supply. The 'I' suffix denotes an industrial temperature grade of -40C to +85C, and the 'P' suffix indicates a through-hole PDIP-40 package. An 8-bit microcontroller (MCU) is a programmable embedded processor that executes one byte (8 bits) of data per instruction cycle, integrating CPU core, RAM, ROM/Flash, timers, communication peripherals, and I/O into a single IC. Within the embedded systems hierarchy it sits below 32-bit MCUs in complexity but above fixed-function logic ICs in flexibility. PIC microcontrollers use a RISC-style Harvard architecture with separate program and data buses, making instruction fetch and data access fully parallel, which delivers deterministic throughput and excellent code density for control applications. Key features include 7 KB (4K x 14) one-time-programmable program memory for firmware storage, 176 bytes of general-purpose SRAM, 33 bidirectional digital I/O pins arranged across multiple ports, an 8-bit timer/counter with prescaler, watchdog timer, power-on reset, brown-out detect, and low-power SLEEP/idle modes. The 40-pin PDIP footprint gives breadboard-friendly through-hole mounting for prototyping and industrial designs. The PIC16C662-10I/P uses Microchip's enhanced mid-range core (14-bit instruction word) with hardware stack and interrupt controller supporting both edge- and level-triggered external interrupts. The 10 MHz oscillator at 5 V yields a 200 ns instruction cycle (Fosc/4), enough for routine control loops, keypad scanning, LCD driving, and UART bit-banging. Typical applications include industrial control panels, HVAC zone controllers, security alarm panels, keypad / LCD user interfaces, motor-driver front ends, low-end appliance controllers, and legacy embedded systems where OTP-based microcontrollers are still preferred for cost or firmware-stability reasons. Its 33 I/O count is well-suited to scanning 4x4 or 5x5 matrix keypads and 4-digit seven-segment displays. When designing with this part, note that OTP memory cannot be rewritten in-circuit - production programming must be done before or during board assembly. Reserve a single ICSP header (RB6/RB7 pins) for factory programming; consider migrating to the flash-based PIC16F87x family if in-field firmware updates are required. Decouple VDD/VSS close to the pins with a 100 nF ceramic plus a 10 uF bulk cap, and use a series resistor on MCLR if in-circuit programming is also needed in production test. This page synthesizes distributor availability, exact 40-pin PDIP drop-in alternatives, and practical OTP vs Flash migration design notes that are not found on the bare manufacturer datasheet, helping engineers evaluate the PIC16C662-10I/P for both new designs and legacy maintenance.

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PIC16C662-10I/PT - 8-bit OTP MCU, 7KB, 33 I/O, 10MHz | Microchip
PIC16C662-10I/PT

PIC16C662-10I/PT - 8-bit OTP MCU, 7KB, 33 I/O, 10MHz | Microchip

The Microchip Technology PIC16C662-10I/PT is an 8-bit CMOS OTP microcontroller built on the PIC16C6x core architecture, featuring 7KB of one-time-programmable program memory, 176 bytes of RAM, and 33 digital I/O pins, housed in a 44-pin TQFP (PT) package with a maximum clock frequency of 10 MHz. A PIC microcontroller is a compact, self-contained computer-on-a-chip combining an 8/16/32-bit CPU core, program memory (ROM/OTP/Flash), data RAM, non-volatile EEPROM, and a rich set of peripherals (timers, ADC, UART, I/O ports) on a single silicon die. Within the semiconductor taxonomy, PIC microcontrollers sit under the broader hierarchy: microcontroller -> embedded processor -> integrated circuit -> semiconductor device. The PIC16C family is the original mid-range OTP/EPROM lineage from Microchip, widely deployed in legacy industrial, appliance, and automotive-electronics designs where rugged, deterministic behavior matters more than flash re-programmability. Key features of the PIC16C662-10I/PT include its 33 I/O pins (one of the highest pin counts in the 44-pin PIC16C6x family), integrated analog comparator, three timer modules, and 8-bit parallel slave port. The device runs from a wide 3.0V to 6.0V supply and supports 10 MHz operation across the industrial -40C to +85C temperature range, as indicated by the "I" suffix. The TQFP-44 (PT) package offers surface-mount manufacturability with a standard 10x10 mm body. The PIC16C662-10I/PT uses a RISC-style 14-bit instruction set with single-cycle execution (except branches), giving deterministic throughput that simplifies real-time control loops. The device does not include in-system programming; OTP memory is programmed via device programmers such as the MPLAB PM3. Power consumption is low (typical operating current under 20 mA at full clock) thanks to CMOS design and the PIC's sleep-mode architecture. Typical applications include human-machine interface controllers, motor control front-ends, security and alarm panels, and consumer appliance mainboards. The wide I/O count also suits LED display drivers, keypad scanners, and sensor-hub controllers where multiple digital lines must be serviced without external glue logic. When designing with this part, plan OTP programming into the production flow (windowed UV-erase variants are available for prototyping but the -10I/PT suffix denotes industrial-temperature OTP only). Decoupling capacitors (0.1 uF plus 10 uF bulk) should be placed within 5 mm of VDD/AVDD and VSS pins. For designs that may migrate to flash memory later, consider the PIC16F662 family, which is pin-compatible. This page synthesizes real distributor pricing, package-level drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet - helping engineers evaluate the PIC16C662-10I/PT for both legacy sustainment and new product design decisions.

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PIC16C662-20/PQ - 8-bit OTP MCU, 7KB, 33 I/O, 20MHz | Microchip
PIC16C662-20/PQ

PIC16C662-20/PQ - 8-bit OTP MCU, 7KB, 33 I/O, 20MHz | Microchip

The Microchip Technology PIC16C662-20/PQ is an 8-bit CMOS microcontroller based on the PIC16C6x core, featuring 7KB of one-time-programmable (OTP) program memory, 176 bytes of RAM, 33 digital I/O lines, and a maximum clock speed of 20 MHz, all housed in a 44-pin MQFP (PQ) package. It belongs to the PIC16C6x mid-range family and integrates a 10-bit Analog-to-Digital Converter, a USART module, a 16-bit Capture/Compare/PWM (CCP) peripheral, and a watchdog timer with its own on-chip RC oscillator. A microcontroller (MCU) is a single-chip computer that contains a processor core, program memory, working RAM, and peripheral interfaces. Within the broader taxonomy, the PIC16C662 belongs to the 8-bit MCU category, which sits beneath the umbrella of microcontrollers, embedded processors, and ultimately semiconductor ICs. 8-bit MCUs remain dominant in cost-sensitive, deterministic control applications where their simple Harvard architecture and predictable instruction timing are advantageous over 32-bit Cortex-M alternatives. Key features include 7KB of OTP program memory for field-programmable but non-rewritable code storage, 33 general-purpose I/O pins with individual direction control, a 20 MHz oscillator input that yields a 5 MHz instruction cycle (one instruction per four oscillator cycles), and a brown-out reset circuit. The integrated 10-bit ADC provides up to 8 analog input channels for direct sensor interfacing without external converters. The PIC16C662 uses Microchip's mid-range RISC architecture with 35 single-word instructions and a 14-bit instruction word. Its OTP program memory makes it well suited to mature, high-volume production where firmware changes are no longer anticipated, whereas flash-based PIC16F6x family members are typically preferred during development and low-volume runs. The PQ suffix designates the 44-pin Metric Quad Flat Pack (MQFP) package, which supports surface-mount assembly. Typical applications include industrial control panels, appliance controllers, automotive body electronics, uninterruptible power supplies, and embedded sensor hubs. The 33 I/O count, integrated USART, and CCP peripheral make it a strong fit for closed-loop motor control, switch-mode power supply secondary-side control, and HVAC damper/valve actuation. When designing with the PIC16C662-20/PQ, note that OTP memory cannot be reprogrammed - all firmware must be fully validated before device programming. Decoupling capacitors of 100 nF should be placed adjacent to each VDD/VSS pair, and unused I/O pins should be configured as outputs to minimize quiescent current. This page synthesizes distributor stock data, drop-in same-family alternatives, and practical design notes not consolidated in the manufacturer datasheet.

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PIC16C662-20/PT - 8-Bit OTP MCU 7KB 20MHz TQFP-44 | Microchip
PIC16C662-20/PT

PIC16C662-20/PT - 8-Bit OTP MCU 7KB 20MHz TQFP-44 | Microchip

The Microchip PIC16C662-20/PT is an 8-bit CMOS OTP-based microcontroller featuring 7KB of program memory (4K x 14 organization), 176 bytes of RAM, and a 20 MHz maximum clock speed, packaged in a 44-pin TQFP (PT) form factor with industrial operating temperature grade. The '20' suffix denotes the 20 MHz speed grade, while the 'C' family designation marks the One-Time-Programmable (OTP) EPROM variant of the PIC16C6xx mid-range architecture. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, ROM/Flash, and peripherals on one die, optimized for embedded control tasks. The PIC16C662 belongs to Microchip's mid-range PIC16 family, which sits between the baseline PIC10/12/16 devices and the high-performance PIC18/dsPIC families. Within the system hierarchy, this device is classified as a microcontroller -> embedded controller -> semiconductor IC. OTP memory means the program can be written once (unlike Flash which is rewritable), which makes the part suitable for low-volume production, prototyping, and legacy systems already in field service. Key features of the PIC16C662-20/PT include five 8-bit I/O ports, three timer/counters, a Watchdog Timer with its own on-chip RC oscillator, a 5-channel 8-bit Analog-to-Digital Converter (ADC), and two analog comparators. The device operates from 4V to 6V (typical 5V), supports in-circuit serial programming via two pins, and provides power-saving SLEEP mode. The brown-out reset and power-on reset circuits are integrated, eliminating external reset components in many designs. The PIC16C662 architecture uses a Harvard-style RISC core with a 14-bit instruction word, a single accumulator (W register), and an instruction pipeline that delivers most instructions in one cycle, giving approximately 5 MIPS throughput at 20 MHz. The 35 single-word instructions and 8-level deep hardware stack make the core deterministic and simple to program in assembly or C, which is why PIC16C-series MCUs remain embedded in industrial controllers, appliance controls, and legacy instrumentation. Typical applications include industrial control panels, HVAC thermostats and fan controllers, security alarm keypads, automotive dashboard sub-modules, vending machine controllers, and legacy LCD/LED display controllers. The 44-pin TQFP footprint provides sufficient I/O for keypad scanning, sensor conditioning through the ADC, and PWM-driven motor or buzzer control. When designing with this device, ensure the OTP programming window (verified by Microchip programming specifications) is used during code development. Pin 1 orientation on the TQFP must be observed per the package marking, and decoupling capacitors of 0.1 µF plus 10 µF tantalum should be placed close to VDD/VSS pairs to suppress switching noise on the analog ADC channels.

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PIC16C662-20E/L - 8-Bit OTP MCU, 7KB, 20MHz, 44-PLCC | Microchip
PIC16C662-20E/L

PIC16C662-20E/L - 8-Bit OTP MCU, 7KB, 20MHz, 44-PLCC | Microchip

The Microchip Technology PIC16C662-20E/L is an 8-bit RISC microcontroller in the PIC16C family, offering 7KB of one-time-programmable (OTP) program memory and 176 bytes of RAM, housed in a 44-pin PLCC (J-Lead) package. The "-20E" speed/temperature grade indicates a 20 MHz maximum clock and an extended industrial temperature range. As a member of the PIC16C6xx mid-range family, it is built around Microchip's enhanced Harvard architecture and is targeted at embedded control applications requiring moderate code density and a generous I/O count. A PIC microcontroller (Peripheral Interface Controller) is a class of 8-bit RISC microcontrollers originally developed by General Instrument's Microelectronics Division and later popularized by Microchip Technology. PIC MCUs sit in the hierarchy: microcontroller -> embedded processor -> semiconductor device. They are widely deployed because of their deterministic instruction set, low power consumption, and a peripheral-rich core that integrates timers, capture/compare/PWM, USART, and A/D converters in a single die. The PIC16C family is the original OTP (windowed/EPROM-based) line, predating the flash-based PIC16F family; today, PIC16C devices are typically selected for legacy designs, automotive modules, and harsh-environment applications where OTP memory provides radiation and code-security benefits. Key features of the PIC16C662-20E/L include 33 digital I/O pins, an integrated 8-channel 8-bit A/D converter, two 8-bit timers plus one 16-bit timer, a USART port, and a watchdog timer. The 20 MHz clock delivers 200 ns instruction cycle (5 MHz instruction rate) and approximately 5 MIPS sustained throughput, sufficient for closed-loop control, simple protocol stacks, and human-machine-interface logic. The 44-pin J-lead PLCC package supports through-hole and socketed designs, simplifying prototype rework and field replacement. Typical applications include industrial sensor conditioning, automotive body controllers, appliance controls, HVAC damper drivers, and simple keypad/display subsystems. The 33 I/O pins comfortably service keypad scanning, LED multiplexing, and direct sensor/actuator wiring without external glue logic. The 8-bit A/D handles slow analog inputs such as thermistors, pressure transducers, and battery monitors. The USART enables RS-232/485 communication with a host controller or peer device. When designing with this MCU, allocate OTP programming time into the production schedule - OTP devices cannot be reprogrammed in-circuit. For prototyping, migrate to the PIC16F662 (flash) drop-in; for production runs of proven firmware, the PIC16C662-20E/L is the lower-cost, higher-reliability choice. Decoupling: 0.1 µF ceramic on VDD/VSS pairs and a 10 µF bulk capacitor on the main rail. This page synthesizes distributor pricing, drop-in OTP/flash alternatives, and practical design notes for the PIC16C662-20E/L not found in the manufacturer datasheet.

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PIC16C662-20E/P - 8-bit OTP MCU, 20 MHz, 33 I/O | Microchip
PIC16C662-20E/P

PIC16C662-20E/P - 8-bit OTP MCU, 20 MHz, 33 I/O | Microchip

The Microchip Technology PIC16C662-20E/P is an 8-bit CMOS OTP-based microcontroller with a 20 MHz maximum clock input (200 ns instruction cycle), 7 KB of one-time programmable program memory, 176 bytes of RAM, and 33 digital I/O lines, housed in a 40-pin PDIP (DIP-40) through-hole package. It operates from a single 4.5 V to 5.5 V supply and is qualified to the AUTOMOTIVE temperature grade, targeting harsh-environment and automotive designs. The /P suffix denotes the plastic DIP package, and the -20E speed/operating-range designator selects the 20 MHz clock at the extended temperature grade. An 8-bit OTP microcontroller is a member of the microcontrollers (MCU) family — a single-chip computer integrating a CPU core, non-volatile program memory (here, one-time programmable EPROM), working RAM, and programmable peripheral I/O on one die. Within the broader taxonomy, the PIC16C662 belongs to: 8-bit MCU -> RISC microcontroller -> CMOS microcontroller -> embedded controller -> semiconductor IC. OTP memory allows a single factory- or customer-programmable code image that cannot be electrically rewritten, which is typically used for low- to medium-volume production where firmware stability has been finalized. Key features include the original PIC16Cxx Harvard RISC architecture with only 35 single-word instructions to learn, 14-bit instruction word, an 8-level deep hardware stack, an integrated analog comparator module, and interrupt-driven I/O with edge-selectable interrupts on PORTB. The device supports a watchdog timer with on-chip RC oscillator, power-saving Sleep mode, and a programmable code-protection bit. Technical depth comes from its CMOS OTP process combined with the Harvard bus that lets instruction and data fetches occur simultaneously, achieving most instructions in a single 200 ns cycle and program branches in two cycles (400 ns). Compared with contemporary EPROM-based MCUs of the same era, the 14-bit wide instruction word provides more opcode room than 8-bit CISC cores and improves code density for arithmetic and bit-manipulation workloads. Typical applications include automotive body and chassis subsystems, white-goods appliance control, industrial sensor interfaces, and low-cost user-interface panels that benefit from a 33-I/O budget and a wide automotive operating temperature range. The DIP-40 footprint is favored for prototype breadboarding and rework-friendly production runs. When designing with this OTP MCU, plan your code carefully because OTP cannot be rewritten after programming; only one code-programming pass is possible. Verify that the application's peripheral set (analog comparator + PORTB interrupts + timer/counter) is sufficient, because the PIC16C662 does not include the ADC, PWM, or USART peripherals found on later PIC16F-series parts. This page synthesizes distributor pricing and stock data, drop-in same-brand alternatives, and engineering design notes that complement the Microchip datasheet and the PICmicro Pin and Code Compatibility charts.

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PIC16C662-20E/PQ - 8-Bit 20MHz 7KB OTP MCU 44-MQFP | Microchip
PIC16C662-20E/PQ

PIC16C662-20E/PQ - 8-Bit 20MHz 7KB OTP MCU 44-MQFP | Microchip

The Microchip Technology PIC16C662-20E/PQ is an 8-bit EPROM/OTP-based CMOS microcontroller delivering 7KB (4K x 14) of one-time-programmable program memory in a 44-pin Metric QFP (MQFP) surface-mount package. The device operates from DC to 20 MHz and integrates 33 digital I/O lines plus analog comparators, positioning it for embedded control applications that need flexible I/O and onboard analog functions. What is an OTP microcontroller? An OTP (One-Time-Programmable) microcontroller contains EPROM-based program memory that can be written once by a programmer and then behaves like ROM for the rest of its operating life. Compared with FLASH MCUs, OTP parts offer lower unit cost in high-volume production and stronger bit-cell retention because the programming is permanent. Compared with masked-ROM parts, OTP avoids the mask NRE charge and shortens development cycles, which is why PIC16C-series devices were historically used in pre-production and small/medium production runs. Key features of the PIC16C662 include 33 I/O pins, a 20 MHz operating frequency (50 ns instruction cycle), integrated analog comparators, and the standard PIC16C peripheral set (timers, USART, capture/compare/PWM). The PIC16C662 belongs to the PIC16C6x mid-range family, sharing the same 14-bit instruction set and core architecture as other 16C6x devices, which simplifies firmware migration across family members. From an architectural perspective, the device uses a RISC-style Harvard core with separate program and data paths, allowing instruction fetch and operand access in the same cycle. The 20E temperature-range suffix specifies an extended operating range of -40C to +125C, while the /PQ suffix denotes a 44-pin Metric Plastic QFP (MQFP) package suitable for surface-mount assembly. Typical applications include industrial control panels, appliance controllers, automotive body and chassis subsystems, motor-drive front-end logic, smart sensors, and instrumentation front-ends. The integrated analog comparators simplify designs that previously required a separate op-amp or comparator IC. A key design consideration is that the PIC16C662 is an OTP part - firmware revisions require a new silicon spin, so the development cycle should converge to a stable firmware image before volume ramp. The extended temperature grade also makes the device suitable for under-hood automotive and outdoor industrial deployments. This page synthesizes distributor stock and pricing, drop-in same-package alternatives, application guidance, and design notes not consolidated in the manufacturer datasheet.

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PIC16C662-20E/PT - 8-Bit OTP MCU, 7KB, 20MHz, 44-TQFP | Microchip
PIC16C662-20E/PT

PIC16C662-20E/PT - 8-Bit OTP MCU, 7KB, 20MHz, 44-TQFP | Microchip

The Microchip Technology PIC16C662-20E/PT is a 8-bit EPROM/OTP-based CMOS microcontroller featuring 7KB of program memory, 176 bytes of RAM, and a 20 MHz maximum operating frequency, housed in a 44-pin TQFP (PT) surface-mount package. It integrates on-chip analog comparators and a 14-bit instruction set optimized for low-power embedded control, operating from a 4V to 6V supply typical of legacy 5V industrial designs. The device also provides multiple timer modules, a watchdog timer, and up to 33 digital I/O pins for general-purpose interfacing. An 8-bit OTP (One-Time Programmable) microcontroller is a single-chip computer built around an 8-bit data path, with non-volatile program memory that can be written only once during production programming. The PIC16C662 belongs to the PIC16Cxx family of microcontrollers -> 8-bit MCU -> microcontroller -> embedded computing IC. This category sits beneath 16-bit and 32-bit MCU families in the embedded hierarchy and remains favored in cost-sensitive, deterministic-control applications where bit-manipulation efficiency and predictable interrupt latency matter more than raw compute throughput. Key features include 4K x 14 words of program memory (7KB), 176 bytes of data RAM, two analog comparators with programmable reference, three timer modules (Timer0, Timer1, Timer2), a watchdog timer with on-chip RC oscillator, and an operating temperature range of -40C to +125C (extended 'E' grade). The 14-bit wide instruction word allows single-cycle instructions for most arithmetic and logical operations, and the Harvard bus architecture separates program and data paths to improve throughput. The part supports in-circuit serial programming (ICSP) and operates across 4.0V to 6.0V input voltage. The PIC16C662 uses a RISC architecture with a fixed instruction set of 35 single-word/14-bit instructions, each typically executing in one instruction cycle (4 clock periods). Internal oscillator options include an RC mode for low-cost designs and a crystal/ resonator mode for precision timing. The device's CMOS process and sleep mode reduce quiescent current to microampere levels, making it suitable for battery-backed instrumentation. Industrial temperature grading and ceramic-package-friendly thermal performance support deployment in factory automation, automotive subsystems, and process control. Typical applications include industrial motor control loops, sensor signal conditioning with on-chip comparators, appliance control boards, automotive body electronics (pre-CAN era), security system panels, and general-purpose 5V embedded control where flash-based MCUs are unnecessary. The two analog comparators make it well-suited for threshold detection on thermistor bridges, photocells, or current-sense amplifiers without needing an external op-amp. When designing with this device, note that OTP memory cannot be reprogrammed in the field; for in-system firmware updates, migrate to the PIC16F662 flash equivalent. Place a 0.1uF decoupling capacitor close to VDD and VSS, and reserve the MCLR pin configuration for the system's required reset topology (internal or external). This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes that go beyond the manufacturer datasheet to accelerate your component selection.

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PIC16C662-20I/P - 7KB OTP 8-bit MCU, 33 I/O, DIP-40 | Microchip
PIC16C662-20I/P

PIC16C662-20I/P - 7KB OTP 8-bit MCU, 33 I/O, DIP-40 | Microchip

The Microchip Technology PIC16C662-20I/P is an OTP-based 8-bit CMOS microcontroller from the PIC16C family, delivering 7KB of program memory, 176 bytes of RAM, and 33 digital I/O pins in a 40-pin PDIP (DIP-40) through-hole package. It executes instructions in a single 200 ns cycle at 20 MHz, with only 35 single-word instructions in its RISC instruction set. Industrial temperature grade (-40C to +85C) and 4.5V to 5.5V supply voltage make it suited to factory and embedded control designs. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, I/O peripherals, and often analog or communication blocks. The PIC16C family represents Microchip's mid-range 8-bit architecture, sitting between the baseline PIC10/12/16 series and higher-pin-count PIC17/18 devices. Within the broader taxonomy, MCUs form a category of microprocessors -> semiconductors -> integrated circuits. The OTP (One-Time Programmable) EPROM program memory offers lower unit cost than windowed or flash parts in mature production runs, at the trade-off of not being erasable. Key features include 33 bidirectional I/O lines, 8-bit data width, internal oscillator support options, two 8-bit timers and one 16-bit timer, a synchronous serial port (SSP) for SPI/I2C, a parallel slave port, two analog comparators, and a programmable watchdog timer. The Harvard architecture separates program (14-bit instruction width) and data (8-bit) buses, allowing instruction fetch and operand access in the same cycle. Typical applications include industrial process controllers, appliance control boards, automotive body and HVAC modules, sensor signal conditioning, motor control, and embedded operator interfaces. Its high I/O count (33) and integrated analog comparators also suit battery management and power-conversion supervisory tasks in legacy designs. When designing with this part, note that OTP memory requires device programming before PCB soldering for production runs; consider the flash-based PIC16F877A or PIC16F887 as reprogrammable substitutes on the same 40-pin PDIP footprint if field updates are needed. This page synthesizes distributor pricing tiers, drop-in same-family alternatives, and practical design notes that go beyond the manufacturer datasheet.

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PIC16C662-20I/PQ - 8-Bit OTP MCU 7KB 33 I/O 20MHz | Microchip
PIC16C662-20I/PQ

PIC16C662-20I/PQ - 8-Bit OTP MCU 7KB 33 I/O 20MHz | Microchip

The Microchip Technology PIC16C662-20I/PQ is a member of the PIC16C66x family of 8-bit CMOS EPROM/OTP microcontrollers with on-chip analog comparators, delivering 7KB of program memory, 176 bytes of RAM, and 33 digital I/O lines. It operates from a 4.5V to 5.5V supply at speeds up to 20 MHz (200 ns instruction cycle), and is housed in a 44-pin MQFP (PQ) package rated for the industrial temperature range (-40C to +85C). An 8-bit microcontroller (MCU) is a small, self-contained computer-on-a-chip integrating a CPU core, program memory, data RAM, and peripherals. The PIC16C family belongs to the broader hierarchy: microcontroller -> embedded controller -> semiconductor -> integrated circuit. Within that taxonomy, the PIC16C662 sits in the mid-range PIC16C family, providing OTP (One-Time-Programmable) program memory suitable for low-to-medium volume production where field upgrades are not required. Key features include a RISC architecture with only 35 single-word instructions to learn, 8-bit data path, two analog comparators with programmable reference, 8-bit/16-bit timers, a synchronous serial port (SSP) supporting SPI and I2C, and a USART with addressable TX/RX buffers. All instructions execute in a single cycle except program branches, which take two cycles - yielding 5 MIPS performance at 20 MHz. The 33 I/O pins can sink/source up to 25 mA each, suitable for direct LED drive. The device is built on Microchip's baseline-plus CMOS process with EPROM program memory, providing field-programmability during development and OTP production cost at volume. The integrated analog comparators eliminate the need for external comparators in many closed-loop control applications, while the SSP and USART enable communication with peripheral ICs and host processors. Typical applications include industrial control logic, motor drive interface circuits, sensor signal conditioning, automotive body electronics, and embedded control subsystems. The wide industrial temperature range and 33 I/O make the PIC16C662-20I/PQ a flexible workhorse for designers building mid-range 8-bit control systems. When designing with this MCU, plan OTP programming into the production flow since OTP memory cannot be erased. Provide adequate decoupling (100 nF + 10 uF) near VDD/AVDD pins, and observe the in-circuit serial programming (ICSP) timing specifications for production programming reliability. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes for the PIC16C662-20I/PQ - information that goes beyond a single datasheet lookup.

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PIC16C662-20I/PT - 8-bit MCU, 7KB OTP, 33 I/O, 20MHz | Microchip
PIC16C662-20I/PT

PIC16C662-20I/PT - 8-bit MCU, 7KB OTP, 33 I/O, 20MHz | Microchip

The Microchip Technology PIC16C662-20I/PT is a high-performance 8-bit CMOS microcontroller based on the PIC16C6x family RISC architecture, delivering up to 20 MHz operation with 7 KB of one-time-programmable (OTP) program memory, 176 bytes of RAM, and 33 digital I/O pins. The device is housed in a 44-pin TQFP (PT) surface-mount package and operates across an industrial temperature range of -40C to +85C. The PIC16C662 belongs to the PIC16C6x mid-range MCU family, a class of 8-bit microcontrollers that combine a RISC instruction set with on-chip peripherals such as timers, capture/compare/PWM modules, and a synchronous serial port. The PIC architecture is a Harvard design with separate program and data buses, and the 'C' suffix indicates the OTP program-memory variant, suitable for low- to mid-volume production where mask-ROM economics do not apply. The 20 MHz maximum clock frequency gives roughly 5 MIPS of sustained instruction throughput, sufficient for control loops, simple communication stacks, and human-machine-interface tasks. Key features include 8-bit data path, 14-bit instruction word, four 8-bit I/O ports, three timers, a USART, and a watchdog timer. Power consumption is a design strength of the PIC16C family, with typical active current below 10 mA at 5V/20 MHz and standby currents in the microamp range through the Sleep mode. Typical applications include appliance control, industrial sensor interfaces, automotive body electronics (non-safety), consumer devices with keypad/LCD interfaces, and embedded control subsystems that need deterministic instruction timing. The wide I/O count (33) simplifies direct connection to keypads, LED/LCD panels, and parallel peripherals without external glue logic. When designing with this part, use Microchip's MPLAB X IDE and a PIC programmer such as MPLAB PM3 or PICkit 3/4 for development. The '20I' suffix specifies 20 MHz operation and industrial temperature grade, distinguishing it from the '04' (4 MHz) and 'E' (extended temperature) siblings.

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PIC16C662T-04/L - 8-Bit 4MHz OTP MCU, 7KB, 44-PLCC | Microchip
PIC16C662T-04/L

PIC16C662T-04/L - 8-Bit 4MHz OTP MCU, 7KB, 44-PLCC | Microchip

The Microchip Technology PIC16C662T-04/L is an 8-bit PIC® 16C-series RISC microcontroller (MCU) built around a Harvard architecture with 7KB of One-Time-Programmable (OTP) program memory organized as 4K x 14 words, 176 bytes of data RAM, and 33 digital I/O pins. The device operates at up to 4 MHz clock input (200 ns instruction cycle) and is housed in a 44-pin PLCC surface-mount package. The '/L' suffix denotes the PLCC package, while the 'T' indicates Tape & Reel packaging, and '-04' specifies the 4 MHz speed grade. What is an OTP microcontroller? An OTP MCU is a type of embedded controller whose program memory can be written only once using a device programmer, after which the contents are permanent (non-erasable). It belongs to the broader family of microcontrollers, which themselves fall under the hierarchy of microprocessors → computing ICs → integrated circuits. OTPs occupy a middle ground between mask-ROM MCUs (lowest unit cost at very high volumes) and flash-based MCUs (re-programmable, higher unit cost), making them popular for cost-sensitive, mature production designs where firmware is stable and field updates are not required. Key features include 35 single-cycle instructions (200 ns except for program branches which take two cycles), a 14-bit instruction word, integrated peripherals such as Brown-out Detect/Reset (BOR), Power-on Reset (POR) and Watchdog Timer (WDT), and a commercial operating temperature grade. The PIC16C662 also provides multiple interrupt sources and a programmable timer/counter subsystem. As a member of the mid-range PIC16C family, it is source- and object-code compatible with many siblings, easing migration within the platform. Typical applications include appliance controls, industrial automation modules, HVAC interface boards, automotive body controllers (non-safety subsystems), security keypads, and embedded user-interface controllers where a stable firmware image, deterministic execution, and low unit cost are priorities. The 33 I/O pins allow direct drive of LED indicators, keypads, and discrete logic. When designing with this part, verify that your firmware has been fully validated before committing to OTP programming because field updates are impossible. The OTP window also requires a specialized programmer that applies programming pulses above VDD; check the Microchip device programmer documentation for compatibility. The 4 MHz speed grade offers the lowest cost; consider the -20 (20 MHz) variants if higher throughput is required. This page synthesizes XAIPART distributor pricing, same-family drop-in alternatives in the same 44-PLCC footprint, and practical design notes (oscillator, programming, brown-out) that are not collected in a single place on the manufacturer product page or on distributor listings.

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PIC16C662T-04E/L - 8-Bit 4MHz OTP MCU 7KB | Microchip
PIC16C662T-04E/L

PIC16C662T-04E/L - 8-Bit 4MHz OTP MCU 7KB | Microchip

The Microchip Technology PIC16C662T-04E/L is an 8-bit CMOS microcontroller from the PIC16C6x family, featuring 7KB (4K x 14) of One-Time Programmable (OTP) program memory and 176 bytes of RAM in a 44-pin PLCC (Plastic Leaded Chip Carrier) J-lead package. It runs at 4 MHz clock input with 200 ns single-cycle instruction execution (except two-cycle branches), operates from a 4.5V to 5.5V supply, and exposes 33 I/O pins across multiple ports, suiting it to embedded control tasks in industrial and automotive environments. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and programmable I/O peripherals on one die. Within the broader taxonomy, the PIC16C662 belongs to the RISC microcontroller family -> 8-bit MCU -> embedded controller -> semiconductor IC. The PIC16C6x family specifically emphasizes Harvard-architecture RISC design with only 35 instructions, simplifying firmware development and code verification for production fleets. Key features include 7KB OTP program memory (one-time programmable, suitable for low-to-medium volume production where firmware is stable), 176 bytes of general-purpose RAM, 33 digital I/O lines, and 20 MHz maximum oscillator input (the "-04" suffix denotes the 4 MHz speed grade). The 44-PLCC package is JEDEC-standard, surface-mountable, and supported by a wide ecosystem of sockets and carriers for both production and prototype environments. From an architectural perspective, the PIC16C662 uses a 14-bit instruction word with a single accumulator (W) plus a file-register-based data memory map. Its RISC pipeline delivers deterministic 200 ns instruction cycles at 4 MHz (or 100 ns at 20 MHz), simplifying real-time control loop timing. The OTP memory reduces per-unit cost versus flash while requiring careful pre-production firmware verification, since post-programming code changes are not possible. Typical applications include automotive body and chassis controllers, industrial automation subsystems, appliance control boards, and legacy embedded products requiring long-term microchip supply continuity. The 33 I/O pins and 7KB code space are well-matched to mid-complexity control logic with several switch inputs, relay outputs, and serial communications. When designing with this part, plan the firmware verification process before committing to OTP programming, since parts cannot be re-programmed. The automotive temperature grade ("-E" suffix, -40C to +125C) and PLCC-44 footprint make it drop-in compatible with other PIC16C662 variants in the same family, simplifying second-source qualification. This page synthesizes verified distributor pricing, same-family drop-in alternatives, and practical design notes for legacy PIC16C662 designs not found in any single distributor listing or manufacturer page.

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PIC16C662T-04E/PT - 8-bit MCU, 7KB OTP, 33 I/O | Microchip
PIC16C662T-04E/PT

PIC16C662T-04E/PT - 8-bit MCU, 7KB OTP, 33 I/O | Microchip

The Microchip Technology PIC16C662T-04E/PT is an 8-bit RISC CMOS microcontroller with 7 KB (4K x 14) of One-Time-Programmable (OTP) program memory and 176 bytes of RAM, housed in a 44-pin TQFP (PT) surface-mount package. It operates from a 4 V to 6 V supply, supports up to 33 digital I/O lines, and runs at a 4 MHz maximum clock rate (the -04 speed grade). An 8-bit microcontroller (MCU) is a small programmable computer on a single integrated circuit that combines a CPU, memory, and peripherals. Within the broader semiconductor hierarchy, MCUs belong to microcontrollers -> microcomputers -> processors -> semiconductors. The PIC16C6x family specifically targets low-power, cost-sensitive embedded control where deterministic instruction execution (a single-cycle RISC core) and a rich peripheral set matter more than raw clock speed. Key features of the PIC16C662 include its 14-bit instruction word, 8-level hardware stack, two 8-bit timers and one 16-bit timer/counter, a Watchdog Timer with its own on-chip RC oscillator, an analog comparator, a capture/compare/PWM (CCP) module, and a synchronous/asynchronous serial port (USART/SCI). The part also offers power-saving SLEEP mode, in-circuit serial programming (ICSP) capability, and programmable code protection. Architecturally, the PIC16C662 uses a Harvard-class RISC core with separate program and data buses, which lets a 14-bit instruction fetch and an 8-bit data read occur in the same Tcy. This yields predictable 4 MHz performance at 4 MHz oscillator input on the -04 speed grade and predictable interrupt latency for real-time control loops. Typical applications include white-goods and appliance control, low-end industrial automation, automotive body and interior modules, HVAC fan and damper control, and battery-powered instrumentation where the OTP memory and CMOS low-power design provide a favorable cost-per-function ratio. The wide 33-I/O count also makes it suitable for keyboard-scanning, LED-driving, and simple user-interface boards. When designing with this device, note that OTP memory is one-time programmable and cannot be erased, so firmware must be fully validated before programming. Decoupling, ground-return integrity, and an external oscillator or resonator circuit (if accuracy beyond the internal RC is required) are the three most common layout items to review. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, with cross-references to PIC16C662 variants for engineers seeking pin-compatible alternatives.

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PIC16C662T-04I/L - 8-Bit 4MHz OTP MCU, 7KB | Microchip | Industrial
PIC16C662T-04I/L

PIC16C662T-04I/L - 8-Bit 4MHz OTP MCU, 7KB | Microchip | Industrial

The Microchip Technology PIC16C662T-04I/L is an 8-bit RISC microcontroller from the PIC16C family, featuring 7KB (4K x 14) of One-Time-Programmable (OTP) program memory and 176 bytes of RAM, operating at a maximum clock speed of 4 MHz. It is housed in a 44-pin PLCC (Plastic Leaded Chip Carrier) package with J-bend leads, measuring 16.59 mm x 16.59 mm, and is rated for the industrial temperature range of -40C to +85C. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, and a set of programmable I/O peripherals. The PIC16C family uses Microchip's classic Harvard-architecture RISC core, which separates program and data buses to allow simultaneous instruction fetch and data access. Within the broader semiconductor taxonomy, the PIC16C662 sits at: microcontroller -> 8-bit MCU -> embedded controller -> integrated circuit. OTP variants like this one are programmed once and cannot be erased, making them suitable for mature, fixed-function industrial products where field updates are not required. Key features of the PIC16C662T-04I/L include 33 programmable digital I/O pins, an integrated analog comparator, a capture/compare/PWM (CCP) module, and a watchdog timer for reliable operation in electrically noisy environments. The 4 MHz oscillator drives a 1 us instruction cycle (4 clocks per instruction), delivering roughly 1 MIPS of throughput, which is sufficient for human-machine interface (HMI) controllers, sensor aggregators, and appliance control boards. The 44-pin PLCC package provides through-hole-friendly J-lead terminations that simplify prototyping and rework while still being surface-mountable on industrial assembly lines. The device operates from a 2.5 V to 5.5 V supply and includes brown-out reset (BOR) and power-on reset (POR) circuitry to protect against low-voltage programming or lock-up conditions. Its RISC core provides 35 single-word instructions, allowing most operations to complete in one instruction cycle. The architecture is well documented and supported by Microchip's MPLAB development ecosystem, including the MPASM assembler and legacy C compilers. Typical applications for the PIC16C662T-04I/L include industrial control panels, HVAC thermostat controllers, appliance user interfaces, vending machine logic boards, and legacy embedded products that require a long-lifecycle 8-bit controller with stable, mature firmware. The industrial temperature grade makes it well suited to factory automation and outdoor equipment enclosures. A key design consideration is that OTP memory cannot be re-programmed; therefore, development and firmware validation should be performed on a UV-erasable PIC16C662 windowed sample or a pin-compatible PIC16F flash variant before committing to OTP production. Engineers should also plan for PCB land pattern compatibility with the 44-PLCC footprint to allow future migration to a flash-based PIC16F equivalent if firmware updates become necessary. This page synthesizes distributor pricing, drop-in compatible alternatives, and practical design notes that complement the manufacturer datasheet and help engineers evaluate lifecycle, sourcing, and second-source options for long-running industrial programs.

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PIC16C662T-04I/PQ - 4MHz 8-bit OTP MCU, 7KB ROM, 44-MQFP | Microchip
PIC16C662T-04I/PQ

PIC16C662T-04I/PQ - 4MHz 8-bit OTP MCU, 7KB ROM, 44-MQFP | Microchip

The Microchip Technology PIC16C662T-04I/PQ is an 8-bit RISC CMOS microcontroller in the PIC16CXXX family, featuring 4096 x 14-bit words (7 KB) of One-Time Programmable (OTP) EPROM program memory, 176 bytes of data RAM, and a maximum operating frequency of 4 MHz. The device is housed in a 44-pin Metric Quad Flat Pack (MQFP) package supplied on Tape & Reel and operates from a single 5 V supply across the industrial -40C to +85C temperature range, as denoted by the I suffix in the part number. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, I/O peripherals and interrupt logic onto one silicon die. Within the broader taxonomy, PIC microcontrollers sit under microcontroller -> embedded processor -> integrated circuit -> semiconductor. PIC16C-series OTP parts target cost-sensitive, low-volume and legacy embedded designs where the firmware is finalized before mask programming and field updates are not required. Key features of the PIC16C662 include a 14-bit instruction word, an advanced RISC Harvard architecture, 33 single-word instructions, a hardware timer/counter, parallel slave port, and integrated analog comparator peripherals. The 40-pin/44-pin PIC16C64X and PIC16C66X family is upward-compatible with smaller 28-pin PIC16CXXX members, allowing code reuse across product variants. Power consumption is in the low milliamp range typical of CMOS PIC devices. The PIC16C662 architecture uses a separate 14-bit program bus and 8-bit data bus (Harvard), enabling most instructions to execute in a single 250 ns instruction cycle at 4 MHz oscillator frequency. The device includes power-on reset, brown-out reset, watchdog timer, and code-protection bits. Peripherals include a synchronous serial port (SSP) for SPI/I2C, a USART, capture/compare/PWM modules, and analog comparators on selected pins. Typical applications include industrial control logic, appliance controllers, automotive body electronics (non-safety), instrumentation front-ends, and replacement of older PIC16C5X designs where a 14-bit instruction word is required. The 44-pin MQFP footprint exposes a generous I/O count suitable for keypad scanning, LCD drive, and multi-channel sensor interfaces. When designing with this part, remember that OTP ROM cannot be re-programmed, so allocate a separate PIC16C66X flash variant (e.g., PIC16F877) for prototypes, and verify the I-grade (-40C to +85C) temperature window against your enclosure thermal profile. Programming requires the Microchip PM3 or MPLAB ICD tools. This page synthesizes distributor stock, pricing and drop-in alternative data not available in a single manufacturer document, including recommended same-package drop-in replacements from the PIC16C662 family and verified cross-brand pin-compatible parts.

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PIC16C662T-04I/PT - 8-Bit 4MHz 7KB OTP MCU TQFP-44 | Microchip
PIC16C662T-04I/PT

PIC16C662T-04I/PT - 8-Bit 4MHz 7KB OTP MCU TQFP-44 | Microchip

The Microchip Technology PIC16C662T-04I/PT is an 8-bit RISC microcontroller from the PIC16C family, featuring 7KB (4K x 14) of One-Time-Programmable (OTP) program memory and operating at speeds up to 4MHz. It is housed in a 44-pin TQFP (10x10 mm) surface-mount package and is supplied on tape and reel, with an industrial operating temperature grade (-40C to +85C). An 8-bit microcontroller (MCU) is a small computer-on-a-chip that integrates a CPU, RAM, program memory, and peripherals into a single IC. The PIC16C family uses a RISC (Reduced Instruction Set Computer) Harvard architecture with 35 single-cycle instructions, delivering deterministic execution and a high MIPS-per-mHz ratio. PIC microcontrollers sit in the broader category of embedded MCUs -> microcontrollers -> integrated circuits -> semiconductors, and they form the backbone of countless industrial, consumer, and automotive subsystems. OTP memory allows one-time programming during manufacturing, making the PIC16C662 well suited to high-volume cost-sensitive applications where firmware stability is fixed at production time. Key features of the PIC16C662T-04I/PT include 7KB (4K x 14) OTP program memory, 176 bytes of RAM, and operating voltage range of 4V to 6V. It integrates multiple peripherals: a 5-channel 8-bit A/D converter, two 8-bit timers and one 16-bit timer, a Watchdog Timer, an LCD driver module (up to 4 common, 32 segments typical), 33 digital I/O pins, and a synchronous serial port (SSP) supporting SPI and I2C. Industrial temperature grade and CMOS low-power technology make it suitable for embedded control panels. The architecture follows Microchip's enhanced PIC16C mid-range core with 14-bit instruction width, supporting interrupts, hardware stack, and in-circuit serial programming (ICSP). Compared to flash-based F-series successors, the C-series OTP provides lower unit cost at high volume but does not support field reprogramming - this is an intentional design trade-off for stable production firmware. Typical applications include appliance control boards, HVAC interface panels, industrial sensor readers, security keypads, automotive dashboard sub-modules, and any high-volume embedded control where OTP memory is acceptable. It is also common in legacy industrial systems that standardized on the PIC16C platform. When designing with this part, note that the OTP memory requires programming during PCB assembly using a Microchip device programmer. Provide a clean 5V supply and respect the 4-6V operating range. The LCD driver module eliminates external LCD controller chips, reducing BOM cost in human-machine interface designs. This page synthesizes distributor pricing, drop-in same-package alternatives (PIC16C662T-04E/PT, PIC16C662-04I/P family members), and practical design notes not aggregated on a single distributor page.

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PIC16C662T-10/L - 8-Bit OTP MCU, 7KB, 10MHz | Microchip
PIC16C662T-10/L

PIC16C662T-10/L - 8-Bit OTP MCU, 7KB, 10MHz | Microchip

The Microchip Technology PIC16C662T-10/L is a member of the PIC® 16C family of 8-bit CMOS RISC microcontrollers featuring 7KB (4K x 14) of One-Time-Programmable (OTP) program memory, packaged in a 44-pin PLCC (J-Lead) form factor. It operates from a 5V supply, runs at up to 10 MHz clock speed, and targets embedded control applications where deterministic RISC execution and legacy OTP code storage are preferred over flash-based parts. An 8-bit microcontroller is a single-chip computer that integrates a CPU core, program memory, data RAM, and peripheral set on one die; the PIC16C662 family sits inside the broader PIC® 16C family, which itself belongs to the Microchip PIC® mid-range (14-bit instruction word) architecture. The 16C-series parts use a Harvard RISC core with a 14-bit-wide instruction word and 8-bit data path, giving a compact code footprint for low-to-moderate complexity control loops. PIC16C6xx devices are commonly deployed in industrial and commercial embedded systems where stable, OTP-based code storage is acceptable and a 44-pin PLCC package is preferred for through-hole or socketed designs. Key features of the PIC16C662T-10/L include 192 bytes of data RAM, a 14-bit instruction word, multiple timer/counter peripherals, a synchronous serial port (SSP) supporting SPI/I2C master and slave modes, and a parallel slave port. The device provides 33 digital I/O pins and supports interrupt-driven control with a programmable watchdog timer. The OTP program memory allows one-time programming in production, providing robust code retention without external EEPROM in many applications. The PIC16C662 architecture uses a two-stage pipeline with a single accumulator and W-register working scheme; the 14-bit instruction word includes literal data and control fields, allowing most instructions to execute in one instruction cycle (four clock periods) at 10 MHz. Built-in brown-out reset and power-on reset circuitry improves system reliability in industrial environments where supply rails may be noisy or slowly rising. Typical applications include industrial control panels, appliance controllers, motor drive interface boards, instrument front-ends, security alarm panels, and legacy embedded systems migrating from 16C-series designs. The wide commercial operating range (0C to +70C) and PLCC socket compatibility make this part a drop-in fit for established production lines. The OTP memory is well suited to high-volume production runs where code has stabilized and field firmware updates are not required. When designing with the PIC16C662T-10/L, pay attention to oscillator configuration (XT/HS/RC modes supported), ensure the PLCC socket is keyed correctly, and reserve an additional flash-based PIC16F part as a backup option if future firmware revisions are anticipated. The commercial temperature grade makes this variant better suited to benign environments than the -I industrial variant. This page synthesizes distributor pricing, verified cross-reference alternatives drawn from Microchip's own Pin and Code Compatibility chart, and engineering design guidance not found on a single datasheet page, giving procurement and design teams a consolidated view of the PIC16C662T-10/L for sourcing and BOM decisions.

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PIC16C662T-10/PQ - 8-Bit OTP MCU, 7KB, 10MHz, 44-MQFP | Microchip
PIC16C662T-10/PQ

PIC16C662T-10/PQ - 8-Bit OTP MCU, 7KB, 10MHz, 44-MQFP | Microchip

The Microchip Technology PIC16C662T-10/PQ is an 8-bit RISC microcontroller from the PIC16C family, featuring 7KB (4K x 14) of One-Time Programmable (OTP) program memory, 176 bytes of data RAM, and a maximum clock speed of 10 MHz, housed in a 44-pin MQFP (10x10 mm) surface-mount package. The "T" suffix indicates tape-and-reel packaging, the "/PQ" suffix denotes the Metric Quad Flat Pack (MQFP-44) variant, and the "-10" speed grade specifies a 10 MHz oscillator. It is built on a CMOS process and integrates Brown-Out Detect (BOD), two analog comparators, Power-On Reset (POR), timers, and a Watchdog Timer (WDT). An 8-bit microcontroller (MCU) is a programmable computing engine that executes instructions on 8-bit data paths and serves as the embedded brain of consumer appliances, industrial controllers, and legacy automotive subsystems. MCUs sit below microprocessors in the silicon hierarchy and above discrete logic, integrating CPU core, non-volatile program memory, working RAM, and peripherals into a single die. The PIC16C family targets cost-sensitive applications where OTP programmability, deterministic instruction timing, and small footprint are valued over in-system re-programmability. Key features of the PIC16C662T-10/PQ include 22 I/O pins with individually programmable direction, a 14-bit instruction word, a Harvard architecture with separate program and data buses, and a wide operating voltage range typical of the PIC16C series. The device is well-suited to applications that require moderate code density (4K words), low power consumption, and analog signal conditioning via on-chip comparators. Typical applications include appliance control boards, industrial sensor interfaces, security and access-control panels, HVAC actuators, and legacy embedded products. Designers typically pair it with external EEPROM or serial ADC peripherals when non-volatile data storage or higher-resolution analog input is required. When designing with the PIC16C662T-10/PQ, ensure the OTP window is masked if code security is required, and account for the 10 MHz oscillator ceiling when selecting crystal or resonator components. Because this is an OTP device, firmware verification must be performed on-window or on pre-programmed parts before final commit; consider a flash-based PIC16F equivalent if in-field firmware updates are required.

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