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PIC16C74AT-20I/L

PIC16C74AT-20I/L - 8-bit 20MHz PIC MCU, 7KB OTP, 44-PLCC | Microchip

The Microchip Technology PIC16C74AT-20I/L is an 8-bit PIC microcontroller built on Microchip's mid-range RISC architecture, offering a 20 MHz maximum operating frequency, 7 KB (4K x 14) of One-Time-Programmable (OTP) program memory, and 192 bytes of RAM, all housed in a 44-pin PLCC package (16.59 x 16.59 mm). What is a PIC 16C microcontroller? PIC 16C devices are members of Microchip's classic mid-range 8-bit microcontroller family, fully static CMOS designs that integrate a RISC CPU core, program memory, data RAM, and a rich set of on-chip peripherals around a unified instruction set. They sit in the broader hierarchy of PIC microcontrollers -> 8-bit microcontrollers -> microcontrollers (MCU) -> microcontrollers and processors -> semiconductors. The "16C" prefix denotes EPROM-based (erasable windowed) program memory, while PIC16F variants use flash; PIC16C parts are typically used where traceability, in-circuit reprogrammability in a windowed package, or long-term reliability validation of the OTP silicon is required. Key features of the PIC16C74AT-20I/L include 33 general-purpose digital I/O pins, an 8-channel 8-bit Analog-to-Digital Converter (ADC), two Capture/Compare/PWM (CCP) modules, an asynchronous/synchronous USART with address masking, a Master Synchronous Serial Port (MSSP) supporting both I2C (Master/Slave) and SPI modes, and a Parallel Slave Port. System integrity features include a Brown-Out Reset (BOR), Power-On Reset (POR), a Watchdog Timer (WDT) with its own on-chip RC oscillator, and dual oscillator options (XT/HS/RC/LP). The "-20I" suffix indicates a 20 MHz speed grade and an industrial temperature range of -40C to +85C. The PIC16C74AT-20I/L uses a Harvard architecture with a separate 14-bit instruction word and 8-bit data path, executing most instructions in a single 200 ns cycle (at 20 MHz). The wide operating voltage range of 4.0 V to 6.0 V supports both 5 V regulated rails and battery-backed systems, while the high sink/source current of 25 mA per I/O pin enables direct LED or relay drive without external buffers. Typical applications include industrial process control, motor control front-ends, instrumentation, automotive body electronics (non-safety), and embedded control in white goods and HVAC subsystems. The on-chip ADC, CCP/PWM and MSSP peripherals make it well suited to closed-loop control systems where deterministic instruction timing and integrated analog simplify the BOM. When designing with this part, confirm that OTP program memory matches the production flow - OTP can be programmed only once and is unsuitable for designs that require firmware updates. Designers targeting long life-cycles should evaluate the flash-based PIC16F74A family or the migration path documented in Microchip device migration guides. This page synthesizes distributor pricing, same-package drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C74AT-20I/PQ

PIC16C74AT-20I/PQ - 8-Bit 20MHz OTP MCU, 7KB | Microchip

The Microchip Technology PIC16C74AT-20I/PQ is an 8-bit PIC microcontroller from the PIC16C7X mid-range family, built on a fully-static CMOS process and packaged in a 44-pin MQFP (10x10 mm). It integrates a 20 MHz core, 7 KB of one-time-programmable (OTP) program memory organized as 4K x 14, 192 bytes of RAM, 33 digital I/O lines, and on-chip peripherals including an analog-to-digital converter and synchronous/asynchronous serial interfaces (SSP/USART). The "T" suffix denotes tape-and-reel packaging, "20" indicates the 20 MHz maximum operating frequency, "I" denotes the industrial -40C to +85C temperature grade, and "/PQ" identifies the 44-pin MQFP package. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and peripheral blocks around a Harvard architecture bus. The PIC16C7X family is the mid-range tier of Microchip's classic PIC line, sitting between the baseline PIC16C5X and the high-performance PIC17C/PIC18C families. PIC MCUs are characterized by their RISC instruction set, single-cycle execution at the oscillator rate, and predictable interrupt latency, which has made them a long-standing choice for embedded control in industrial, automotive, and consumer products. Key features include 13 interrupt sources, a 200 ns instruction cycle at 20 MHz, an 8-level deep hardware stack, and a watchdog timer with its own on-chip RC oscillator for fail-safe recovery. The device supports in-circuit serial programming (ICSP) via RB6/RB7, allowing the OTP memory to be programmed after PCB assembly. The brown-out reset and power-on reset blocks protect the controller during supply transients in harsh industrial environments. The architecture uses a 14-bit instruction word with separate code and data buses, enabling simultaneous instruction fetch and data access for deterministic throughput. The ADC block provides 8 inputs with 8-bit resolution, and the capture/compare/PWM module supports timing-critical motor and power-conversion applications. The 33 I/O pins feature high-current sink/source capability for direct LED and relay drive. Typical applications include industrial control panels, sensor signal conditioning, motor drive interface, embedded instrumentation, and legacy replacement designs migrating from PIC16C5X baselines. The industrial temperature range and OTP memory make it well-suited for cost-sensitive volume production where firmware is finalized at board build time. When designing with this device, remember that OTP memory cannot be re-programmed in the field; for development and low-volume production consider the PIC16F74 flash equivalent. The 44-MQFP package requires careful thermal management at high clock rates, and decoupling capacitors must be placed within 5 mm of the VDD pins per the Microchip datasheet. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the standalone manufacturer datasheet.

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PIC16C74AT-20I/PT

PIC16C74AT-20I/PT - 8-Bit 20MHz OTP MCU 7KB | Microchip

The Microchip Technology PIC16C74AT-20I/PT is a member of the PIC16C7X mid-range 8-bit microcontroller family, integrating an 8-channel Analog-to-Digital Converter with 7KB (4K x 14) of One-Time Programmable (OTP) program memory, 192 bytes of user RAM, and a 20MHz maximum operating frequency delivering 5 MIPS of CPU throughput. Housed in a 44-pin TQFP (PT) package (10x10mm body) with the industrial -40C to +85C operating temperature range, the PIC16C74AT-20I/PT provides 33 digital I/O lines, three timer modules, two capture/compare/PWM peripherals, a USART, and the synchronous serial port that defines this family. An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, typically integrating a CPU core, program memory (ROM/OTP/Flash), working RAM, and a mix of peripherals (timers, ADC, communication ports, GPIO). PIC microcontrollers from Microchip Technology are RISC-based Harvard-architecture devices with a small instruction set (35 single-word instructions on the mid-range family) that simplifies coding while still offering deterministic real-time performance. PIC16C parts sit in the mid-range PIC taxonomy: PIC10/12/16/18 (8-bit) -> PIC16F/PIC16C mid-range family -> PIC16C7X sub-family (with integrated ADC). This hierarchy matters because selecting within the same family guarantees pinout, peripheral set, and instruction-set compatibility. Key differentiating features include the integrated 8-bit ADC, hardware USART for RS-232/RS-485 links, dual CCP modules for PWM or input-capture timing, and a synchronous serial port that can be configured for SPI or I2C master mode. The OTP memory allows short programming lead time for prototype builds but is single-write only, so engineers should plan migration to a Flash-based PIC16F or PIC18 equivalent for production volumes. At the architectural level the PIC16C74A uses a 14-bit instruction word and separate program/data buses, allowing the CPU to fetch an instruction while simultaneously reading data memory - the canonical Harvard advantage. Power management is handled by selectable oscillator modes (XT, HS, RC, LP) and a power-saving SLEEP state with multiple wake-up sources including the Watchdog Timer. Typical applications include industrial control boards, appliance controllers, automotive body electronics (pre-CAN modules), sensor signal conditioning with on-chip ADC, and small motor-control loops leveraging the CCP/PWM peripherals. The wide industrial temperature range makes the -I grade suitable for factory-floor equipment. When designing with this part, plan OTP programming workflow early - the device cannot be re-programmed and the same silicon is unavailable in Flash. The TQFP-44 footprint is shared with PIC16F874/877 Flash equivalents that are drop-in code-and-pin compatible, easing migration paths. This page synthesizes distributor pricing snapshots, drop-in compatible Microchip alternatives (PIC16C74AT-20I/PQ, PIC16C74AT-20/PT, PIC16C74A-20I/L), and practical design considerations not found in the manufacturer datasheet.

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PIC16C74B-04/L

PIC16C74B-04/L - 8-Bit OTP MCU 7KB 4MHz 33 I/O PLCC-44 | Microchip

The Microchip Technology PIC16C74B-04/L is an 8-bit CMOS RISC microcontroller in the PIC16CXX mid-range family, supplied in a 44-pin PLCC package with 7KB (4K x 14) of One-Time Programmable (OTP) program memory. It operates from a 4 MHz external clock input (the -04 speed grade), runs an instruction in 200 ns, supports a 4V to 5.5V supply, and exposes 33 digital I/O lines plus 8 channels of 8-bit Analog-to-Digital conversion. An OTP microcontroller is a type of non-volatile programmable logic device whose program memory can be written exactly once after manufacture, retaining its code without power and offering lower per-unit cost than ceramic-windowed UV erasable parts for production runs. The PIC16C74B-04/L sits in the broader taxonomy: microcontroller -> 8-bit MCU -> mid-range RISC MCU -> CMOS embedded controller -> semiconductor, where it bridges simple 8-pin PIC10/12 devices and the 16-bit PIC24/dsPIC families. This positioning explains its adoption in industrial control, automotive body electronics and legacy embedded designs. Key features include 192 bytes of data RAM, two 8-bit timers plus one 16-bit timer, a 5-channel 8-bit A/D converter with brown-out reset and a watchdog timer. The synchronous serial port can be configured as either a 3-wire SPI or 2-wire I2C interface, and a separate USART provides asynchronous serial communication. An 8-level deep hardware stack and 35 single-word RISC instructions reduce code density and ease firmware development for legacy C and assembly projects. The architecture implements a Harvard-style memory map with separate code and data buses, allowing instruction fetch and operand read to occur in a single clock cycle for most instructions. Program branches are two cycles; everything else executes in one cycle. The OTP program memory is implemented as EPROM cells, giving deterministic in-system programming via the standard Microchip ICSP protocol. Brown-out reset, power-on reset and the watchdog timer provide three independent reset sources that harden the device against brown-out and software-stall conditions in unattended equipment. Typical applications include industrial control logic, automotive body and chassis subsystems (pre-CAN era platforms), appliance controllers, security and access-control panels, and legacy communication peripherals requiring USART plus SPI or I2C on the same silicon. The wide 4V-5.5V operating range tolerates unregulated 5V supplies common in industrial cabinets. When designing with this device, plan the OTP programming flow early because the part cannot be reprogrammed in-circuit after the UV window is sealed. Place a 100 nF decoupling capacitor close to VDD and VSS, and reserve the MCLR pin for the standard Microchip ICSP header so production programming and field firmware recovery remain practical. This page synthesizes distributor pricing, drop-in alternatives and practical design notes not found in the standalone PIC16C74B datasheet.

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PIC16C74B-04/PQ

PIC16C74B-04/PQ - 8-Bit 4MHz OTP MCU 7KB Flash | Microchip

The Microchip PIC16C74B-04/PQ is an 8-bit CMOS OTP (One-Time Programmable) mid-range microcontroller from the PIC16CXX family, operating at 4 MHz instruction execution with 200 ns per instruction cycle. The device integrates 7 KB (4K x 14) of program memory, 192 bytes of RAM, and 33 digital I/O pins in a 44-pin MQFP (10x10 mm) package, targeting embedded control applications that require on-chip peripherals and a wide operating voltage range. A microcontroller (MCU) is a single-chip computer containing a processor core, program memory, working RAM, and peripheral interfaces such as timers, A/D converters, and communication ports. Mid-range PIC microcontrollers occupy the middle of Microchip's 8-bit portfolio - more capable than the PIC16C5X baseline family and upward-compatible with PIC12CXXX devices, but predating the PIC18 enhanced family. The 'C' suffix in PIC16Cxx denotes OTP EPROM program memory, suitable for production runs where code stability is finalized but where in-circuit reprogrammability is not required; Flash-based 'F' variants are typically preferred for prototypes and field-updatable designs. Key specifications include 8 channels of 8-bit Analog-to-Digital conversion, two additional 8-bit timers plus Timer0 and Timer1, two Capture/Compare/PWM (CCP) modules, and a synchronous serial port configurable as either 3-wire SPI or 2-wire I2C. A USART (Universal Synchronous/Asynchronous Receiver/Transmitter) provides asynchronous serial communication. The device supports high sink/source current of 25 mA per I/O, low standby current of 1 µA typical at 3V/32 kHz, and 15 µA typical operating current at 5V/4 MHz. Operating voltage spans 2.5V to 6.0V across commercial, industrial, and extended temperature grades. The PIC16C74B architecture uses a Harvard-style RISC core with only 35 single-word instructions, simplifying firmware development and reducing code footprint. Its mid-range peripheral set - particularly the 8-channel ADC and dual CCP - positions it for analog signal acquisition, motor control, and industrial instrumentation. The wide operating voltage and temperature range extend use into automotive under-hood and harsh industrial environments. Typical applications include industrial process control, motor drive interfaces, sensor signal conditioning, power supply monitoring, and embedded data acquisition systems. The 44-pin MQFP footprint suits designs where through-hole PDIP is too large but QFN is unavailable in the OTP memory configuration. When designing with the PIC16C74B-04/PQ, account for OTP memory constraints by finalizing firmware before programming, and consider the Flash-based PIC16F74 as a development substitute since both share the same die and pinout. This page synthesizes distributor pricing, drop-in PIC16C74B variants, and practical design notes not aggregated in any single manufacturer or distributor source.

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PIC16C74B-04/PT

PIC16C74B-04/PT - 8-Bit CMOS MCU, 4MHz, 7KB EPROM, TQFP-44 | Microchip

The Microchip Technology PIC16C74B-04/PT is an 8-bit CMOS microcontroller built on the PIC16C mid-range RISC architecture, featuring 7 KB of one-time-programmable EPROM program memory, 192 bytes of RAM, and 33 digital I/O lines, all housed in a 44-pin TQFP (PT) surface-mount package. It runs at 4 MHz maximum clock input with a 1 us instruction cycle, operates from 4 V to 5.5 V, and integrates 8 channels of 8-bit Analog-to-Digital conversion, two 8-bit timers plus one 16-bit timer, two Capture/Compare/PWM modules, a synchronous serial port configurable as SPI or I2C, and a USART. The '04' speed grade denotes 4 MHz operation; a '20' grade variant is available for 20 MHz / 200 ns instruction cycle designs. A microcontroller (MCU) is a single-chip computer containing a CPU core, non-volatile program memory, working RAM, and a configurable set of peripheral interfaces. The PIC16C family uses a Harvard RISC architecture with a small instruction set (35 single-word instructions) that lets most instructions execute in one instruction cycle, providing predictable real-time behaviour with simple C or assembly code. PIC16C parts sit in the hierarchy: microcontroller -> embedded MCU -> 8-bit MCU -> CMOS RISC MCU -> Microchip PIC16C family. Key differentiating features of the PIC16C74B include its parallel EPROM program memory (windowed variants allow UV erasure for prototyping; OTP variants are one-time programmable for production), hardware USART for asynchronous serial communications, and the Capture/Compare/PWM peripheral for timing and motor-control applications. The 8-channel 10-bit equivalent (8-bit on the 74B variant) ADC removes the need for an external converter in mixed-signal designs, while the master SSP supports both SPI and I2C peripherals without additional glue logic. The architecture separates program and data buses (Harvard), letting instruction fetch and data access occur in the same cycle. EPROM-based program memory is preferred over Flash for legacy designs that need radiation tolerance or long-term retention without frequent firmware updates. The PIC16C74B shares its peripheral set and pinout with later PIC16F and PIC18 K-series migration paths. Typical applications include industrial control panels, motor-drive signal conditioning, instrumentation front-ends, sensor interfaces with on-chip ADC, and embedded communication front-ends that use the USART or SSP. Its wide operating temperature range and CMOS low-power design make it suitable for harsh-environment embedded systems. When designing with the PIC16C74B-04/PT, ensure that your compiler toolchain (MPLAB XC8 or legacy HI-TECH PICC) supports the PIC16C OTP/EPROM family and that the EPROM windowed variant is ordered for prototype development, not the OTP-only /PT production variant. Decoupling VDD with 0.1 uF + 10 uF caps and routing the MCLR pull-up correctly are mandatory. This page combines verified distributor pricing, drop-in alternative MPNs from the PIC16C/PIC16F family, and practical design notes that go beyond the bare datasheet, giving engineers a single source for selection and sourcing.

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PIC16C74B-04E/L

PIC16C74B-04E/L - 8-bit OTP MCU 4MHz 7KB 44-PLCC | Microchip

The Microchip Technology PIC16C74B-04E/L is an 8-bit CMOS OTP-based microcontroller in the PIC16CXX mid-range family, operating at up to 4 MHz with 7KB (4K x 14) of One-Time-Programmable program memory and 192 bytes of data RAM, housed in a 44-pin PLCC (J-Lead) package. The 'E' suffix denotes the Extended temperature grade (-40C to +125C) and 'L' designates the 44-LCC J-Lead package, while '04' specifies the 4 MHz maximum clock speed. The PIC16CXX mid-range architecture executes instructions in 200 ns (at 20 MHz / 5 V) and offers 35 single-word instructions for easy programming. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and peripherals on one die. The PIC16C family sits within Microchip's mid-range MCU hierarchy: PIC10/12/16 baseline -> PIC16C mid-range -> PIC18/dsPIC enhanced -> 32-bit Cortex-M class. Mid-range MCUs target embedded control tasks that need deterministic timing, simple peripheral sets, and code density better than 8-bit baselines without the cost of a 32-bit core. Key features include 33 digital I/O lines, 8 channels of 8-bit Analog-to-Digital conversion, two 8-bit timers plus one 16-bit timer, two Capture/Compare/PWM (CCP) peripherals, a synchronous serial port configurable as SPI or I2C, and a Universal Synchronous/Asynchronous Receiver-Transmitter (USART). High sink/source current of 25 mA per pin simplifies direct drive of LEDs and small relays. Wide operating voltage spans 2.5 V to 6.0 V with typical standby current of 1 uA at 3 V / 32 kHz. Typical applications include industrial control panels, automotive body electronics, sensor signal conditioning, and embedded instrumentation where the extended temperature range and OTP-based code security are required. The PIC16C74B is also a drop-in successor to PIC16C74A variants in the same 44-pin PLCC footprint, offering a clear migration path within Microchip's mid-range portfolio.

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PIC16C74B-04E/P

PIC16C74B-04E/P - 8-bit OTP MCU, 7KB EPROM, 4MHz, 40-PDIP | Microchip

The Microchip PIC16C74B-04E/P is a CMOS OTP-based 8-bit PIC16C mid-range microcontroller delivering 4 MIPS performance through a 200 ns instruction cycle, integrated in a 40-pin PDIP package. The device provides 7 KB (4K × 14) of one-time-programmable EPROM program memory, 192 bytes of RAM, and 33 digital I/O pins, with an 8-channel 8-bit A/D converter, two 8-bit timers plus one 16-bit timer, two capture/compare/PWM modules, a synchronous serial port configurable as SPI or I²C, and a USART. An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, optimized for deterministic control of low-to-medium complexity embedded systems. PIC microcontrollers belong to the Harvard-architecture RISC family of MCUs, a category that sits within the broader microcontroller IC taxonomy (MCU -> microcontroller -> embedded processor -> semiconductor). The PIC16C mid-range family is upwards compatible with the PIC16C5X baseline family, allowing code reuse across generations. Key features of the PIC16C74B include wide operating voltage from 2.0 V to 6.0 V, 25 mA source/sink current per I/O, and low-power operation with typical standby current of 15 µA at 5 V/4 MHz and 1 µA at 3 V/32 kHz. The device supports commercial, industrial, and extended temperature ranges, making it suitable for cost-sensitive industrial and consumer designs requiring robust digital I/O and integrated analog. Technically, the PIC16C74B uses a 14-bit instruction word and a Harvard bus architecture with separate program and data paths, enabling single-cycle instruction fetch and decode. Its 35 single-word instruction set simplifies assembly development, while the integrated peripherals reduce external component count for typical control loops, sensor interfacing, and communication bridging. Typical applications include industrial control panels, motor control, sensor signal acquisition, embedded communications bridges, and consumer appliance controllers. The wide temperature range and EPROM-based program storage make it well suited for mature production runs that value supply longevity and field-proven firmware stability. When designing with the PIC16C74B-04E/P, note that the OTP EPROM cannot be erased, so code is final after programming - consider the PIC16F74 flash variant for development and field updates. Decoupling capacitors of 0.1 µF should be placed close to VDD/VSS pins, and unused I/O should be configured as outputs low to minimize power consumption. This page synthesizes distributor pricing, drop-in PIC16C74B family variants, and practical design notes not found in the standalone manufacturer datasheet, helping engineers accelerate selection and sourcing.

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PIC16C74B-04E/PQ

PIC16C74B-04E/PQ - 8-bit MCU, 7KB OTP, 4MHz, 44-MQFP | Microchip

The Microchip Technology PIC16C74B-04E/PQ is an 8-bit CMOS microcontroller from the PIC16CXX mid-range family, integrating 7KB (4K x 14) of One-Time Programmable (OTP) program memory and 192 bytes of RAM in a 44-pin Metric Quad Flat Pack (MQFP, 10x10 mm) package. It operates at up to 4 MHz clock speed from a 5 V supply, executes one instruction per 200 ns cycle, and supports the enhanced PIC mid-range instruction set with 35 single-word instructions. What is a PIC16C74B? The PIC16C74B belongs to the PIC16 mid-range 8-bit microcontroller family, a class of RISC microcontrollers built on Harvard architecture with separate program and data buses. These devices sit in the hierarchy: microcontroller -> embedded MCU -> 8-bit MCU -> PIC mid-range, and they are widely used as the system controller in cost-sensitive industrial and consumer products where deterministic real-time response matters more than raw throughput. The PIC16C74B integrates 33 digital I/O lines, an 8-channel 8-bit Analog-to-Digital Converter (ADC), two 8-bit timers plus one 16-bit timer, two Capture/Compare/PWM (CCP) modules, a synchronous serial port configurable as 3-wire SPI or 2-wire I2C, and a USART with 9-bit address masking. The brown-out reset, watchdog timer with on-chip RC oscillator, and programmable code protection harden the device for unattended installations. Typical applications include industrial automation controllers, automotive body and chassis subsystems, consumer appliances, uninterruptible power supply (UPS) front panels, and sensor-conditioning front-ends. The 8-channel ADC allows direct interface with thermistor, potentiometer, or 4-20 mA loop transducers, while the dual CCP modules drive brushed DC motors or generate precision PWM waveforms for switching power supply control loops. The "E" suffix denotes the Extended industrial temperature grade (-40C to +125C), and "04" specifies the 4 MHz maximum oscillator frequency. The PIC16C74B-04E/PQ is supplied in Pb-free MQFP-44 packaging on tray, and programmers using the Microchip MPLAB ICD 2/3 or PICSTART Plus can develop code with the free MPLAB X IDE and MPASM assembler.

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PIC16C74B-04E/PT

PIC16C74B-04E/PT - 8-bit OTP MCU, 7KB, 4MHz, TQFP-44 | Microchip

The Microchip Technology PIC16C74B-04E/PT is an 8-bit CMOS RISC microcontroller from the PIC16CXX mid-range family, featuring 7KB (4K x 14) of One-Time Programmable (OTP) EPROM program memory, 192 bytes of RAM, and 33 digital I/O lines, housed in a 44-pin TQFP (PT) surface-mount package. It runs from a 4 MHz external oscillator at 4 MHz with a 200 ns instruction cycle, supports a wide operating voltage range of 2.5V to 6.0V, and is specified over the Extended temperature grade (-40C to +125C) as indicated by the "E" suffix. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (ROM/EPROM/Flash), volatile data memory (RAM), and a set of programmable peripherals (timers, ADC, communication ports, GPIO). Within the broader taxonomy, the PIC16C74B belongs to the 8-bit MCU family -> mid-range PIC architecture -> RISC MCU -> embedded controller. These devices are designed for deterministic real-time control with a small instruction set (35 single-word instructions), short interrupt latency, and low power consumption - typically under 15 uA at 5V/4 MHz and 1 uA standby at 3V/32 kHz. Key features include 8 channels of 8-bit A/D conversion, 2 additional timers beyond the basic Timer0/Timer1 pair, 2 Capture/Compare/PWM (CCP) modules, a synchronous serial port configurable as either 3-wire SPI or 2-wire I2C, and a USART for asynchronous serial communication. High sink/source current of 25/25 mA per pin allows direct LED drive, while the EPROM-based program memory simplifies prototyping by enabling windowed erasure and reprogramming on JTAG/ICSP-compatible devices. Architecturally, the PIC16C74B uses a Harvard-style separate program/data bus with a 14-bit instruction word and an 8-bit data path. The 200 ns instruction execution at 20 MHz (5 MIPS peak) and 1 us at 4 MHz deliver predictable timing for control loops. An integrated brown-out reset, power-on reset, watchdog timer with on-chip RC oscillator, and programmable code protection round out the embedded feature set. Typical applications include industrial control panels, automotive body and instrument clusters, HVAC fan/blower controllers, white-goods motor control front-ends, and legacy embedded systems where OTP EPROM is acceptable. The TQFP-44 footprint suits high-density mainboards where DIP packages cannot fit. When designing with this part, note the EPROM windowing caveat: only ceramic-windowed packages are erasable; the plastic TQFP-44 is one-time-programmable in production. Plan firmware accordingly and keep a programming reserve. This page synthesizes distributor pricing, drop-in TQFP-44 alternatives, and design notes not aggregated in any single manufacturer datasheet, with cross-references validated against the Microchip parametric search and the PIC16C74B datasheet.

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PIC16C74B-04I/L

PIC16C74B-04I/L - 8-bit OTP MCU, 7KB, 4MHz, 44-PLCC | Microchip

The Microchip Technology PIC16C74B-04I/L is an 8-bit CMOS OTP-based microcontroller from the PIC16CXX mid-range family, delivering 4 MIPS performance through a 200 ns instruction cycle at 4 MHz clock input. The device integrates 7 KB of OTP program memory (4K x 14), 192 bytes of RAM, and 33 digital I/O pins in a 44-pin PLCC (J-Lead) package, qualified for the industrial -40C to +85C temperature range. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and peripheral interfaces onto one silicon die. Within the broader taxonomy, the PIC16C74B belongs to the mid-range 8-bit MCU class (vs. baseline 12-bit core and enhanced 14-bit core), uses Harvard architecture with separate program/data buses, and executes one instruction per internal clock cycle (except program branches which are two cycles). The mid-range PIC family employs an advanced RISC instruction set with only 35 single-word instructions, enabling rapid code development and high code density. OTP (One-Time Programmable) memory is mask-ROM-like non-volatile storage that can be written once during production programming - distinct from flash which can be rewritten many times in-circuit. Key features include 8 channels of 8-bit Analog-to-Digital conversion, two additional 8-bit timers (TMR0, TMR1, TMR2), two Capture/Compare/PWM modules, a synchronous serial port configurable as either 3-wire SPI or 2-wire I2C, and a USART with 9-bit address detection. The device operates from 2.5V to 5.5V across the industrial temperature range, includes an 8-level hardware stack, power-on reset, brown-out detect, watchdog timer with on-chip RC oscillator, and in-circuit serial programming capability. The PIC16C74B uses Microchip's PIC16C mid-range core built on a fully-static CMOS process, with a 14-bit instruction word and 8-bit data path. The Harvard architecture allows simultaneous instruction fetch and data access, and the 200 ns instruction execution at 4 MHz provides deterministic interrupt response suitable for real-time control loops. The on-chip peripherals are mapped into the data memory space and accessed via banked registers, with the FSR/INDF indirect addressing mechanism for pointer-based data access. Typical applications include industrial control panels, motor control subsystems, automotive body electronics (pre-CAN era), smart sensor interfaces, and embedded control modules requiring reliable OTP memory with deterministic interrupt latency. The 33 I/O pins and dual PWM channels make the device suitable for driving multiple actuators or LED arrays from a single chip. When designing with this device, ensure the OTP programming step is integrated into the production flow because OTP memory cannot be field-upgraded. The PLCC package provides socket compatibility for legacy through-hole production lines but requires a footprint transition for new designs moving to surface-mount packages. The 4 MHz maximum clock is the limiting performance factor; designs requiring higher throughput should consider the PIC16C74B-10 or PIC16C74B-20 speed grades or the flash-based PIC18F family. This page synthesizes distributor pricing, drop-in alternative MPNs, and practical design notes - including pinout, package-svg, and FAQ not found on the manufacturer datasheet alone - to accelerate component selection for engineers maintaining legacy PIC16C designs.

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PIC16C74B-04I/P

PIC16C74B-04I/P - 8-Bit 4MHz OTP MCU 7KB 40-PDIP | Microchip

The Microchip Technology PIC16C74B-04I/P is an 8-bit CMOS RISC microcontroller in the PIC16CXX mid-range family, delivering 4 MHz CPU clock (200 ns instruction cycle) with 7 KB of One-Time Programmable (OTP) program memory and 192 bytes of RAM, housed in a 40-pin PDIP (Plastic DIP) through-hole package. What is a PIC16 mid-range MCU? The PIC16CXX family is a generation of Microchip 8-bit microcontrollers built around a Harvard RISC architecture that executes single-cycle instructions from a 14-bit program word store. Mid-range PICs combine a compact 35-instruction set with integrated peripherals (ADC, timers, USART, SPI/I2C) and have been a workhorse for industrial, automotive aftermarket, and legacy embedded designs since the 1990s. The PIC16C74B specifically targets applications that need more I/O and memory than the smaller PIC16C6x family while keeping the OTP cost advantage. Key features include 8 channels of 8-bit ADC, two 8-bit timers plus one 16-bit timer, two Capture/Compare/PWM (CCP) modules, a synchronous serial port configurable as SPI or I2C, and a USART for asynchronous serial communication. The device supports 33 digital I/O lines organized across five ports (PORTA-PORTE), an operating voltage of 4.0 V to 5.5 V, and an industrial temperature grade of -40 °C to +85 °C as indicated by the "I" suffix. Architecturally, the PIC16C74B uses a fully-static CMOS design with separate program and data buses (Harvard architecture), enabling single-cycle instruction fetch plus execute on all instructions except program branches, which take two cycles. The 04 speed grade specifies a 4 MHz maximum oscillator input. The "C" in PIC16C denotes the OTP/EPROM ROMless windowed family, distinguished from the flash-based "F" parts such as the PIC16F877. Typical applications include industrial control panels, instrumentation and metering, sensor interfacing using the on-chip ADC, motor-control hobby projects using the CCP/PWM channels, and legacy embedded systems that require OTP-based firmware storage for cost or anti-retrofit reasons. Because the part is OTP, firmware is committed at programming time and cannot be re-flashed in-circuit. When designing with this device, place a 0.1 µF decoupling capacitor on VDD within 5 mm of the pin and use a bulk 10 µF tantalum on the supply rail. The MCLR reset pin must be pulled high through a 10 kΩ resistor for normal operation; an optional reset circuit can use a diode and RC network for power-on-reset delay. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C74B-04I/PQ

PIC16C74B-04I/PQ - 8-Bit 4MHz OTP MCU, 7KB, 44-MQFP | Microchip

The Microchip Technology PIC16C74B-04I/PQ is an 8-bit CMOS OTP-based microcontroller in the PIC16CXX mid-range family, operating at up to 4 MHz with 200 ns instruction execution. It integrates 7 KB (4K x 14) of One-Time-Programmable program memory and 192 bytes of data RAM, housed in a 44-pin MQFP (10x10 mm) package with industrial -40C to +85C temperature rating. An 8-bit microcontroller is a small computer-on-a-chip that combines a CPU, RAM, non-volatile program memory, and peripherals on a single die. The PIC16C74B belongs to the PIC mid-range architecture hierarchy (8-bit PIC -> PIC16 family -> PIC16C7x sub-family), sits within the broader Microcontroller (MCU) category, and is part of Integrated Circuits > Microcontrollers. Mid-range PIC16 devices use a 14-bit instruction word and a RISC core with only 35 single-word instructions, providing deterministic timing and very low power consumption. Key features include 8 channels of 8-bit Analog-to-Digital conversion, 33 digital I/O pins with 25 mA sink/source drive, two additional timers, two Capture/Compare/PWM modules, a synchronous serial port configurable as 3-wire SPI or 2-wire I2C, and a USART. Wide operating voltage spans 2.5 V to 6.0 V, with typical standby current of 1 uA at 3 V/32 kHz and 15 uA at 5 V/4 MHz, making the part suitable for both line-powered and battery-backed designs. The architecture pairs a Harvard RISC core with 5 MIPS peak throughput at 4 MHz, an internal 8-bit data bus, and a 14-bit program bus. The OTP program memory is windowed for prototype development and field-programmed via Microchip's standard ICSP interface, while the EPROM-style die allows short reprogram cycles during engineering. Typical applications include industrial control systems, instrumentation front-ends with on-chip ADC, motor-control PWM drivers, embedded sensor hubs, and legacy PIC16C designs being maintained or re-spun. The combination of USART, SPI/I2C and an 8-channel ADC makes the part a versatile single-chip solution for analog-dominated 5 V systems. When designing with this MCU, budget for OTP one-time programming: code changes require new parts for production. Provide a robust decoupling network (100 nF + 10 uF) near VDD and use the MCLR reset circuit with the recommended 10 kohm pull-up. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC16C74B-04I/PT

PIC16C74B-04I/PT - 8-Bit 4MHz OTP MCU, 7KB Flash | Microchip

The Microchip Technology PIC16C74B-04I/PT is an 8-bit CMOS RISC microcontroller from the PIC16CXX mid-range family, featuring 7KB (4K x 14 words) of One-Time Programmable (OTP) program memory, 192 bytes of RAM, and 33 general-purpose I/O pins in a 44-pin TQFP (10x10 mm) surface-mount package. It operates at a clock speed of 4 MHz with a 200 ns instruction cycle, executes the 35-instruction PIC mid-range instruction set, and provides 8 channels of 8-bit Analog-to-Digital conversion alongside two capture/compare/PWM modules, two additional timers, and a configurable synchronous serial port that can be set as either 3-wire SPI or 2-wire I2C plus a USART. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and peripheral interfaces on one silicon die. The PIC16CXX mid-range family sits between the baseline PIC16C5X and the enhanced PIC17CXX families, balancing code density, peripheral set, and cost for embedded control applications such as industrial sensors, appliance controls, automotive body electronics, and low-cost consumer devices. Key differentiating features include 8 channels of 8-bit ADC, 2 CCP (Capture/Compare/PWM) modules for motor and lighting control, hardware I2C/SPI/USART enabling direct connection to sensors and EEPROMs, and a wide operating voltage range suitable for both 5V and 3.3V systems. The OTP memory and industrial-grade temperature rating (-40C to +85C) make this part well suited for medium-volume production where field reprogrammability is not required. The PIC16C74B-04I/PT uses Microchip's classic Harvard RISC architecture with separate program and data buses, enabling single-cycle instruction execution for most opcodes and deterministic interrupt response. Its CMOS fully-static design allows the clock to be stopped without losing register state, an advantage for battery-powered or power-cycled applications where the controller must wake, execute, and return to sleep quickly. Typical applications include industrial automation controllers, HVAC sensor interfaces, automotive body and lighting modules, consumer appliance control boards, and low-end embedded data acquisition. Designers commonly pair this MCU with external EEPROMs for parameter storage and with discrete MOSFET drivers for switching solenoids, relays, or small DC motors. A key design consideration is the OTP memory window: once programmed, code is permanent, so engineering teams must use a windowed or flash sibling (such as PIC16F74 or PIC16F877A) for development. Also note that the 4 MHz speed grade (the "-04" suffix) is the slowest in this family; if timing margins are tight, the 10 MHz or 20 MHz grade variants of the same die are drop-in substitutes.

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PIC16C74B-20/L

PIC16C74B-20/L - 8-Bit OTP MCU 7KB 20MHz 44-PLCC | Microchip

The Microchip Technology PIC16C74B-20/L is an 8-bit CMOS one-time programmable (OTP) microcontroller from the PIC16CXX mid-range family, offering 7KB (4K x 14) of program memory, 192 bytes of RAM, and 33 digital I/O lines. Housed in a 44-pin PLCC (Plastic Leaded Chip Carrier) package, it executes instructions at 20 MHz with a 200 ns instruction cycle, providing high-performance RISC computing in a compact footprint. What is a PIC mid-range 8-bit MCU? A PIC (Peripheral Interface Controller) microcontroller is a compact integrated circuit that combines a CPU, memory, and programmable peripherals on a single die. The mid-range family (PIC16C) sits between baseline (PIC10/12/16F general-purpose) and enhanced mid-range (PIC18) families, offering 35 single-word instructions, 14-bit instruction width, and a balance of peripherals for embedded control. PIC16C parts use OTP (one-time programmable) EPROM program memory, which is differentiated from flash-based PIC16F variants. Key features include 8 channels of 8-bit Analog-to-Digital conversion, two 8-bit and one 16-bit timer/counter modules, two Capture/Compare/PWM (CCP) peripherals, a synchronous serial port configurable as SPI or I2C, and a USART for asynchronous serial communication. Operating voltage spans 4.0V to 5.5V, suiting legacy 5V industrial and embedded designs. The architecture employs a Harvard design with separate program and data buses, allowing 14-bit instruction fetch and 8-bit data access in a single cycle. Brown-out Reset (BOR), Watchdog Timer (WDT), and Power-on Reset (POR) provide robust operation in noisy environments. The 44-PLCC package gives 33 I/O - more than 28-pin PIC16C73 family members. Typical applications include industrial process controllers, motor control subsystems, instrumentation front-ends, and automotive body electronics where code stability and 5V tolerance outweigh the need for in-system reprogrammability. When migrating designs, consider PIC16F74 flash variants for in-circuit reprogrammability - the pinout is compatible with PLCC-44 footprints. This page synthesizes current distributor pricing, drop-in PIC16C74B alternatives, and PLCC-44 design notes not consolidated on the Microchip product page.

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PIC16C74B-20/P

PIC16C74B-20/P - 8-bit OTP MCU 7KB Flash 20MHz 40-PDIP | Microchip

The Microchip Technology PIC16C74B-20/P is an 8-bit CMOS RISC microcontroller from the PIC® 16C family, featuring 7KB (4K x 14) of One-Time-Programmable (OTP) program memory, 192 bytes of RAM, and 33 digital I/O pins in a 40-pin PDIP through-hole package. It operates at up to 20 MHz clock speed with a 200 ns instruction cycle, runs from a 4.0 V to 5.5 V supply, and integrates 8 channels of 8-bit A/D conversion, two 8-bit timers plus one 16-bit timer, two Capture/Compare/PWM modules, and a configurable synchronous serial port that supports both 3-wire SPI™ and 2-wire I²C™ plus a USART. Background: An 8-bit OTP microcontroller is a single-chip processor with on-chip non-volatile program memory that can be written exactly once via external programming voltage, then behaves like mask-ROM. OTP parts sit in the hierarchy: microcontroller -> embedded processor -> semiconductor IC. Compared to flash-based MCUs (e.g. PIC16F), OTP MCUs offer lower per-unit cost at high volume and are typically used for mature, locked firmware designs in appliance, industrial, and automotive subsystems where firmware updates are not expected in the field. Key features include Harvard RISC architecture with only 35 single-word instructions, all single-cycle except program branches (which take two cycles), 8-channel 8-bit ADC with input multiplexing, dual CCP modules for PWM and event capture, brown-out reset and power-on reset, watchdog timer with on-chip RC oscillator, and an industrial temperature grade. The device is code- and pin-compatible with the PIC16C73B and PIC16C65B predecessors, simplifying upgrades. Typical applications include motor control (BLDC and stepper), industrial process control, sensor interfacing, embedded control in appliance and HVAC, automotive body and chassis subsystems, and general-purpose 8-bit control boards. The DIP-40 package and breadboard-friendly pinout also make it suitable for educational, prototyping, and legacy replacement scenarios. When designing with this part, note that OTP memory cannot be erased or rewritten; firmware must be fully verified before programming. Always provide a decoupling capacitor on VDD, and respect the programming voltage specification on the MCLR/VPP pin if in-circuit programming is intended. This page synthesizes distributor pricing, pin-compatible drop-in alternatives (PIC16C73B, PIC16C74A), and practical design notes not found in the manufacturer datasheet alone.

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PIC16C74B-20/PQ

PIC16C74B-20/PQ - 8-Bit CMOS MCU, 7KB OTP, 20MHz | Microchip

The Microchip Technology PIC16C74B-20/PQ is an 8-bit CMOS mid-range microcontroller built around the PIC16CXX core, supplied in a 44-pin MQFP (10x10) package and offering 7KB (4K x 14) of One-Time-Programmable (OTP) program memory, 192 bytes of RAM, and 33 digital I/O lines. The device executes instructions at a 20 MHz clock rate, delivering 5 MIPS of throughput, and integrates 8 channels of 8-bit Analog-to-Digital conversion, two additional timers, two Capture/Compare/PWM modules, and a synchronous serial port that can be configured as either 3-wire SPI or 2-wire I2C, plus a USART for asynchronous serial communication. An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path and a Harvard architecture that separates program and data memory. Within the broader taxonomy, the PIC16C74B belongs to Microchip's PIC16 mid-range family of microcontrollers, which sits under the larger PIC family of 8-bit microcontrollers, the semiconductor category of microcontrollers, and ultimately the integrated circuit hierarchy. The 'C' in PIC16C indicates OTP/EPROM-based program memory, the '74B' identifies the specific peripheral mix and pin-count variant, and the '20' suffix designates the 20 MHz maximum operating frequency. Key features include 192 bytes of data RAM, 33 I/O pins, an integrated 8-channel 8-bit ADC, two CCP/PWM modules, an SSP configurable as SPI or I2C, a USART, and an operating voltage range suitable for 5V systems. The OTP program memory allows one-time programming for low-to-medium volume production, and the 20 MHz clock supports real-time control loops. The MQFP-44 (10x10 mm) package provides a proven through-hole-replacement surface-mount footprint widely accepted in industrial control designs. Architecturally, the PIC16C74B uses a RISC instruction set with only 35 single-word instructions, an 8-level deep hardware stack, and a deterministic interrupt structure. The Harvard bus allows simultaneous instruction fetch and data access, and the integrated analog and digital peripherals reduce external component count. The combination of OTP memory, broad peripheral integration, and 5 MIPS performance makes the part a workhorse for cost-sensitive embedded control applications. Typical applications include industrial automation controllers, motor drive interface boards, sensor signal conditioning front-ends, embedded control boards in white goods and HVAC equipment, and educational or hobbyist development platforms. The wide I/O count and integrated ADC simplify mixed-signal designs, while the USART and SSP enable communication with sensors, displays, and other microcontrollers. Operating temperature is commercial 0C to +70C. Designers should note that the PIC16C74B is an OTP device, so firmware must be fully validated before programming; for in-field reprogrammability, consider the flash-based PIC16F74 or PIC18F equivalents. The MQFP package requires a 10x10 mm land pattern with adequate thermal relief for reflow soldering, and unused I/O pins should be configured as outputs or pulled to defined logic levels to minimize supply current. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers and buyers a single-source reference for the PIC16C74B-20/PQ.

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PIC16C74B-20/PT

PIC16C74B-20/PT - 8-Bit 20MHz OTP MCU 7KB | 44-TQFP | Microchip

The Microchip Technology PIC16C74B-20/PT is an 8-bit CMOS microcontroller from the PIC16C7X mid-range family, running at 20 MHz with 200 ns instruction cycle, integrating 7 KB (4K x 14) of One-Time-Programmable (OTP) program memory and 192 bytes of RAM in a 44-pin TQFP (10x10 mm) surface-mount package. It features 33 digital I/O lines, an 8-channel 8-bit Analog-to-Digital Converter, two 8-bit timers with capture/compare/PWM, one 16-bit timer with capture/compare/PWM, a synchronous serial port configurable as either 3-wire SPI or 2-wire I2C, plus a Universal Synchronous/Asynchronous Receiver Transmitter (USART/SCI). Supply voltage is 4.0 V to 5.5 V. What is an 8-bit OTP microcontroller? An OTP (One-Time-Programmable) microcontroller is a class of embedded controller that uses non-erasable PROM (programmable read-only memory) for code storage, sitting within the broader hierarchy of microcontroller -> embedded controller -> semiconductor. OTP parts offer a lower-cost alternative to windowed UV-erasable parts in volume production, since the program is written once during manufacturing test and the die lacks the expensive quartz erasure window. PIC mid-range devices use a RISC instruction set (35 single-word instructions) so every instruction executes in one cycle (200 ns at 20 MHz), with program branches taking two cycles. Key features include 33 I/O pins, hardware USART for serial communication, dual-mode master/slave SSP for SPI or I2C peripherals, and an integrated 8-channel 8-bit ADC that simplifies sensor-interface designs. The PIC16C7X family is code- and pin-compatible with the earlier PIC16C6X family, easing migration. The Watchdog Timer, power-on reset, brown-out reset, and code protection provide robust embedded reliability for industrial control, instrumentation, and consumer appliances. Architecturally, the PIC16C74B uses a 14-bit instruction word and a Harvard bus architecture that separates program and data memory, allowing instruction fetch and operand read in the same cycle. The mid-range core implements a hardware multiplier-free ALU that performs arithmetic, logical, and bit-manipulation operations on the working register W, with file registers mapped into banked SRAM. The 8-bit ADC uses successive approximation with a sample-and-hold, capable of 20 µs conversion time. Typical applications include industrial process control, motor drive front-ends (via CCP/PWM), HVAC control boards, instrumentation front-panels, sensor conditioning, security-system panels, and white-goods controllers. Designers select the PIC16C74B-20/PT when they need more I/O and ADC channels than the smaller 28-pin PIC16C73B. When designing with this part, confirm the production-fit OTP variant is acceptable for your volume (OTP cannot be reprogrammed). For field-updatable firmware, migrate to the flash-based PIC16F74 or PIC18F equivalents, which are drop-in compatible at the pin level. Use MPLAB X IDE with MPASM or XC8 for code development, and the ICD-series in-circuit debuggers for early prototypes. This page synthesizes verified distributor pricing, pin-compatible same-family alternatives, and practical design guidance specific to the 44-TQFP variant of the PIC16C74B-20/PT - information not found in a single manufacturer datasheet.

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PIC16C74B-20E/P

PIC16C74B-20E/P - 8-Bit 20MHz CMOS MCU 7KB OTP 40-Pin PDIP

The Microchip Technology PIC16C74B-20E/P is an 8-bit CMOS RISC microcontroller from the PIC16CXX mid-range family, featuring 7KB of one-time-programmable (OTP) program memory, 192 bytes of RAM, and 33 digital I/O pins in a 40-pin PDIP through-hole package. It executes instructions at a 20 MHz clock rate using a 4-clock-per-instruction architecture (200 ns instruction cycle), supports a wide operating voltage range of 4.0 V to 6.0 V, and offers commercial, industrial, and extended temperature grades. The -E suffix denotes the extended temperature range (-40 °C to +125 °C) for harsh-environment operation. Per the manufacturer datasheet, the part also integrates an 8-channel 8-bit Analog-to-Digital converter, two additional timers, two Capture/Compare/PWM modules, a synchronous serial port configurable as 3-wire SPI or 2-wire I²C, and a USART with high sink/source current of 25 mA per I/O. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral interfaces onto one silicon die. The PIC16C74B-20E/P belongs to the PIC16 mid-range architecture, sitting in the hierarchy: microcontroller -> embedded controller -> RISC MCU -> 8-bit CMOS MCU -> PIC16CXX family. Mid-range PICs use a Harvard architecture with separate program and data memory paths, enabling most instructions to execute in a single instruction cycle. The OTP variant (windowed CERDIP for development; plastic PDIP for production) historically targeted cost-sensitive and rugged industrial designs that did not need in-circuit reprogrammability. Key features that distinguish this part include its 35-instruction RISC instruction set with single-cycle execution (except branches), 4 K x 14-bit program word organization (7 KB), low-power modes including 1 µA typical standby at 3 V / 32 kHz and 15 µA typical at 5 V / 4 MHz, and selectable oscillator options (RC, XT, HS, LP). The integrated 8-channel 8-bit ADC supports up to 8 analog inputs for sensor acquisition without external components, and the parallel port architecture allows direct connection to LCDs, keypads, and external memory. Typical applications span industrial control and automation nodes, automotive body and chassis subsystems (extended temperature grade), embedded sensor-interface boards, hobbyist and educational development platforms, and legacy equipment retrofits where OTP memory is acceptable. When designing with this part, allocate sufficient decoupling on VDD/VSS (100 nF + 10 µF typical), confirm MCLR reset-network compliance, and choose the correct oscillator configuration bit setting (RC/XT/HS/LP) for the external crystal or resonator used.

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PIC16C74B-20I/L

PIC16C74B-20I/L - 8-Bit 20MHz OTP MCU 7KB | 44-PLCC | Microchip

The Microchip Technology PIC16C74B-20I/L is an 8-bit CMOS OTP (One-Time-Programmable) microcontroller from the PIC16C family, executing instructions at 20 MHz clock input with a 200 ns instruction cycle and packaged in a 44-pin PLCC (16.59 x 16.59 mm) J-Lead windowed/ceramic package. The device integrates 7 KB of program memory (4K x 14 organization) and 192 bytes of RAM, with 33 digital I/O lines and a wide operating voltage range of 4.0 V to 5.5 V suitable for industrial temperature grades (-40 C to +85 C). An 8-bit microcontroller (MCU) is a small, self-contained computer-on-a-chip built around an 8-bit data path, on-chip program memory, RAM, and a set of peripherals. PIC16C MCUs are part of the broader category of RISC microcontrollers within the semiconductor power-management and embedded-control taxonomy: MCU -> microcontroller -> embedded processor -> semiconductor. They target deterministic, low-cost, low-power embedded control where a full 32-bit processor would be overkill. Key features of the PIC16C74B include 8 channels of 8-bit Analog-to-Digital conversion, two additional timers, two Capture/Compare/PWM peripherals, and a synchronous serial port configurable as either 3-wire SPI or 2-wire I2C, plus a USART for asynchronous serial communication. The high-performance RISC CPU uses only 35 single-word instructions, with all instructions executing in one cycle except program branches (two cycles), enabling predictable real-time response. The OTP program memory, parallel I/O architecture, and ceramic PLCC windowed package indicate this part is intended for prototype development, low-volume industrial production, and legacy industrial control systems where field-programmability is not required. Compared with flash-based successors like PIC16F74, this OTP variant offers lower unit cost in volume but cannot be re-programmed. Typical applications include industrial control systems, motor control, sensor interfacing, building automation, embedded instrumentation, and legacy retrofit designs. The wide industrial temperature range and robust peripheral set make the PIC16C74B well suited for factory-floor equipment. When designing with the PIC16C74B, ensure your programmer supports OTP devices - a windowed CERDIP/PLCC package allows UV erasure for development iteration, but production programming must be done before final encapsulation. Decoupling capacitors (100 nF plus 10 uF bulk) should be placed within 5 mm of VDD pins. This page synthesizes verified distributor pricing, drop-in pin-compatible alternatives, and practical engineering notes not consolidated on any single distributor or manufacturer page, helping engineers make sourcing and substitution decisions in seconds.

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PIC16C74B-20I/P

PIC16C74B-20I/P - 8-bit MCU, 7KB OTP, 20MHz, 40-PDIP | Microchip

The Microchip Technology PIC16C74B-20I/P is an 8-bit EPROM-based CMOS microcontroller from the PIC16C7x mid-range family, integrating 7KB (4K x 14) of one-time-programmable (OTP) program memory, 192 bytes of RAM, and 33 digital I/O pins in a 40-pin PDIP (Plastic DIP) package. Operating at up to 20 MHz clock input, it delivers 5 MIPS of performance with a 200 ns instruction cycle, executing 35 single-word RISC instructions, with program branches consuming only two cycles. A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and configurable peripherals. The PIC16C74B sits in the broader taxonomy as follows: microcontroller -> embedded controller -> 8-bit MCU -> mid-range MCU -> EPROM/OTP MCU -> PIC16C7x family. The "C" suffix designates the EPROM/OTP process technology, while the "B" revision improves ADC performance and peripheral capability over the original PIC16C74 and PIC16C74A. The PIC16C74B features an 8-channel, 8-bit Analog-to-Digital converter, two additional 16-bit timer/counters, two Capture/Compare/PWM (CCP) modules, a synchronous serial port configurable as either 3-wire SPI or 2-wire I2C, and a Universal Asynchronous Receiver-Transmitter (USART). The "-20" speed suffix specifies 20 MHz maximum clock input, while the "I" suffix indicates an industrial operating temperature range of -40C to +85C. Supply voltage is specified at 4.0V to 5.5V from the verified distributor data, and the package suffix "/P" denotes a 40-pin PDIP through-hole form factor. Typical applications include industrial control systems, embedded data acquisition, motor control via the CCP/PWM channels, sensor signal conditioning through the on-chip ADC, and legacy equipment maintenance where the EPROM/OTP architecture allows production-programmed firmware. The PIC16C74B-20I/P is commonly found in supervisory controllers, instrumentation front-ends, and process-control modules where a simple RISC core and integrated analog peripherals reduce BOM cost. Designers should consider the OTP limitation: firmware cannot be reprogrammed in-circuit. For modern designs requiring flash memory and lower power, Microchip recommends the PIC16F74 or PIC18F family as functional upgrades, though pin compatibility is partial. Always validate the brown-out reset, watchdog timer, and oscillator configuration bits during programming to ensure deterministic startup.

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PIC16C74B-20I/PQ

PIC16C74B-20I/PQ - 8-Bit 20MHz OTP MCU 7KB Flash | Microchip

The Microchip Technology PIC16C74B-20I/PQ is an 8-bit CMOS RISC microcontroller in the PIC16CXX mid-range family, featuring 7KB (4K x 14) of one-time-programmable (OTP) program memory, 192 bytes of RAM, and 33 digital I/O lines. It operates at up to 20 MHz instruction rate (200 ns instruction cycle), housed in a 44-pin MQFP (10x10 mm) package with industrial-grade -40C to +85C temperature range, identified by the /PQ package suffix. An OTP microcontroller is a class of microcontroller whose program memory is implemented as one-time-programmable EPROM, allowing a single firmware write during production. Within the broader PIC architecture taxonomy, OTP MCUs sit below flash-based MCUs (e.g., PIC16F) but above mask-ROM parts in flexibility, making them ideal for low-to-medium volume embedded products where production cost outweighs in-field reprogrammability needs. The PIC16C74B-20I/PQ is part of Microchip's legacy mid-range lineup targeted at industrial control, instrumentation, and embedded communication designs. Key differentiating features include 8 channels of 8-bit Analog-to-Digital conversion, two 8-bit timers plus one 16-bit timer, 2 capture/compare/PWM modules, a synchronous serial port configurable as 3-wire SPI or 2-wire I2C, and a USART for asynchronous serial communications. The 25 mA high sink/source current per I/O allows direct driving of LEDs, relays, and small solenoids without external buffers, simplifying BOM and reducing board area in cost-sensitive designs. Architecturally, the PIC16C74B-20I/PQ employs Microchip's advanced Harvard RISC architecture with a 14-bit instruction word and an 8-bit data path. The device executes most instructions in a single 200 ns cycle at 20 MHz oscillator input, providing deterministic throughput that simplifies real-time control loops. The integrated brown-out reset, watchdog timer, and power-on reset support robust embedded operation without external supervisory components. Typical applications include industrial automation controllers, motor control subsystems, sensor signal conditioning, embedded serial communication bridges, and low-cost consumer appliances. The wide operating voltage range of 2.5V to 6.0V plus low-power standby of 1 uA typical at 3V/32 kHz make the device suitable for battery-backed or energy-conscious installations. When designing with this part, note that OTP memory cannot be erased in-circuit - firmware must be fully validated before programming. Engineers typically migrate to flash-based PIC16F74 (drop-in compatible) or PIC18F equivalents for prototypes and low-volume production, reserving OTP PIC16C74B for high-volume runs where per-unit cost dominates. This page synthesizes distributor pricing, drop-in PIC16C/PIC16F alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C74B-20I/PT

PIC16C74B-20I/PT - 8-Bit CMOS MCU, 7KB EPROM, 20MHz, TQFP-44 | Microchip

The Microchip Technology PIC16C74B-20I/PT is a high-performance 8-bit CMOS microcontroller based on Microchip's PIC16CXX mid-range RISC architecture, integrating 7 KB of one-time-programmable EPROM program memory, 192 bytes of RAM, and 33 digital I/O lines into a 44-pin TQFP (PT) surface-mount package rated for the industrial temperature range (-40°C to +85°C). An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/EPROM/Flash), data memory (RAM), and peripheral interfaces on one silicon die. Within the taxonomy of embedded processors, an 8-bit MCU sits below 16-bit and 32-bit MCUs in data-path width but excels in deterministic real-time control, low cost, and ultra-low power consumption. The PIC16C74B belongs to Microchip's mid-range PIC16 family, which provides a RISC instruction set (35 single-word instructions), Harvard memory architecture, and rich on-chip peripherals including 8-channel 8-bit ADC, two CCP modules, a USART, and a synchronous serial port configurable for SPI or I²C. Key features of the PIC16C74B-20I/PT include a 20 MHz maximum clock speed (200 ns instruction cycle), a wide operating voltage range of 2.5 V to 6.0 V with the canonical 4.0 V to 5.5 V operating range typical for this -20 variant, 25 mA source/sink current per I/O pin, and low power consumption of typically <15 µA at 5 V/4 MHz and <1 µA standby at 3 V/32 kHz. The 8-channel 8-bit ADC delivers 8-bit resolution across PORTA and PORTE analog inputs, while the USART and SSP peripherals enable asynchronous serial and SPI/I²C synchronous communication respectively. The PIC16C74B uses a 14-bit instruction word with an 8-bit data path, enabling direct, deterministic interrupt response times and single-cycle instruction execution for most opcodes (program branches take two cycles). The device supports in-circuit serial programming (ICSP) via two pins, allowing firmware updates without removing the part from the board. Industrial temperature grade (-40°C to +85°C) and EPROM program memory make this variant suitable for development and low-volume production where in-system reprogrammability is not required. Typical applications include industrial control systems, sensor signal conditioning, motor control (via CCP/PWM), embedded instrumentation, and legacy equipment maintenance. The 33 I/O pins and 8 ADC channels suit applications requiring multiple sensor inputs and digital outputs. The PIC16C74B-20I/PT remains in active production and is widely used as a drop-in upgrade for PIC16C74A designs where higher clock speed is needed.

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PIC16C74BT-04/L

PIC16C74BT-04/L - 8-Bit 4MHz OTP MCU, 7KB, 44-PLCC | Microchip

The Microchip Technology PIC16C74BT-04/L is an 8-bit RISC microcontroller from the PIC16CXX mid-range family, delivering 4 MHz CPU performance with 7 KB (4K x 14) of One-Time-Programmable (OTP) program memory and 192 bytes of SRAM in a 44-pin PLCC (J-lead) surface-mount package sized 16.59 x 16.59 mm. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, RAM, and peripherals on one die. Within the broader taxonomy, the PIC16C74B belongs to Microchip's mid-range 8-bit PIC16C family - widely used in industrial control, consumer appliances, and automotive body electronics where deterministic instruction execution and mature CMOS process technology matter more than raw MHz. The 'C' in PIC16C denotes the OTP/EPROM program-memory flavor, while 'B' denotes the silicon revision (B-step). Microcontrollers sit at the foundation of embedded systems, providing programmable intelligence between sensors/actuators and higher-level processors. Key features include 33 digital I/O pins organized across multiple ports, an integrated 8-channel 8-bit ADC, two 8-bit timers plus one 16-bit timer/counter, a Universal Synchronous/Asynchronous Receiver Transmitter (USART/SCI), and a Synchronous Serial Port (SSP/SPI/I2C). The CMOS, low-power RISC-VIII variant runs from a 5 V rail and supports a commercial 0 °C to +70 °C operating range for benign environments, while a fully-static core architecture enables power-down drivers and reduces quiescent draw - characteristics suited to commissioning industrial control modules requiring deterministic interrupt handling. Technically, the PIC16C14B uses a Harvard memory bus, a 14-bit shared bus with 35-level shared instruction bus, and a 4-stage pipeline bus design. Functionally, the PIC16C14B uses a Harvard organization with a 14-bit instruction bus and a shared 8-bit data bus; it executes 35 shared instructions at 4 clock bus/cycle, providing deterministic interrupt handling. Typical applications include industrial control panels, white-goods and consumer appliances, HVAC thermostats, and automotive body controllers requiring deterministic code execution through in-system reprogramming. The wide peripheral availability includes standard CMOS peripherals suitable for direct injection, supporting direct interfaces to sensors and industrial actuators. When designing with this part, design a robust decoupling strategy using two common decoupling capacitors on the supply pins, and design a stable 5 V supply pin regulator - critical for the industrial control modules requiring deterministic timing in automotive firmware.

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PIC16C74AT-20I/L - 8-bit 20MHz PIC MCU, 7KB OTP, 44-PLCC | Microchip

PIC16C74AT-20I/PQ - 8-Bit 20MHz OTP MCU, 7KB | Microchip

PIC16C74AT-20I/PT - 8-Bit 20MHz OTP MCU 7KB | Microchip

PIC16C74B-04/L - 8-Bit OTP MCU 7KB 4MHz 33 I/O PLCC-44 | Microchip

PIC16C74B-04/PQ - 8-Bit 4MHz OTP MCU 7KB Flash | Microchip

PIC16C74B-04/PT - 8-Bit CMOS MCU, 4MHz, 7KB EPROM, TQFP-44 | Microchip

PIC16C74B-04E/L - 8-bit OTP MCU 4MHz 7KB 44-PLCC | Microchip

PIC16C74B-04E/P - 8-bit OTP MCU, 7KB EPROM, 4MHz, 40-PDIP | Microchip

PIC16C74B-04E/PQ - 8-bit MCU, 7KB OTP, 4MHz, 44-MQFP | Microchip

PIC16C74B-04E/PT - 8-bit OTP MCU, 7KB, 4MHz, TQFP-44 | Microchip

PIC16C74B-04I/L - 8-bit OTP MCU, 7KB, 4MHz, 44-PLCC | Microchip

PIC16C74B-04I/P - 8-Bit 4MHz OTP MCU 7KB 40-PDIP | Microchip

PIC16C74B-04I/PQ - 8-Bit 4MHz OTP MCU, 7KB, 44-MQFP | Microchip

PIC16C74B-04I/PT - 8-Bit 4MHz OTP MCU, 7KB Flash | Microchip

PIC16C74B-20/L - 8-Bit OTP MCU 7KB 20MHz 44-PLCC | Microchip

PIC16C74B-20/P - 8-bit OTP MCU 7KB Flash 20MHz 40-PDIP | Microchip

PIC16C74B-20/PQ - 8-Bit CMOS MCU, 7KB OTP, 20MHz | Microchip

PIC16C74B-20/PT - 8-Bit 20MHz OTP MCU 7KB | 44-TQFP | Microchip

PIC16C74B-20E/P - 8-Bit 20MHz CMOS MCU 7KB OTP 40-Pin PDIP

PIC16C74B-20I/L - 8-Bit 20MHz OTP MCU 7KB | 44-PLCC | Microchip

PIC16C74B-20I/P - 8-bit MCU, 7KB OTP, 20MHz, 40-PDIP | Microchip

PIC16C74B-20I/PQ - 8-Bit 20MHz OTP MCU 7KB Flash | Microchip

PIC16C74B-20I/PT - 8-Bit CMOS MCU, 7KB EPROM, 20MHz, TQFP-44 | Microchip

PIC16C74BT-04/L - 8-Bit 4MHz OTP MCU, 7KB, 44-PLCC | Microchip