Circuitos integrados

PIC16C74A-10/PQ

PIC16C74A-10/PQ - 8-bit OTP MCU, 7KB, 44-MQFP | Microchip

The Microchip Technology PIC16C74A-10/PQ is an 8-bit CMOS, fully-static RISC microcontroller in the PIC16CXX mid-range family, integrating 7KB of one-time-programmable (OTP) program memory, 192 bytes of RAM, and an on-chip 8-channel 8-bit analog-to-digital converter in a 44-pin Metric Quad Flat Pack (MQFP) package. It operates from 2.0V to 6.0V and is rated for the -10 speed grade (10 MHz maximum clock input), making it suitable for general-purpose embedded control. Three hardware timers (Timer0, Timer1, Timer2), a synchronous serial port (SSP) supporting SPI and I²C, a USART with addressable 9-bit mode, a capture/compare/PWM (CCP) module, and 33 digital I/O lines round out the peripheral set. A microcontroller (MCU) is a single-chip computer that combines a CPU core, non-volatile program memory, working RAM, and a configurable set of peripheral blocks such as timers, communication interfaces, and ADCs. Within the embedded hierarchy, the PIC16C74A belongs to the mid-range 8-bit family, sitting between the baseline PIC10/12/16 families and the enhanced mid-range PIC16F1xxx. OTP-based MCUs target cost-sensitive high-volume production where firmware is finalized before mask/one-time programming, and they share the same instruction set and peripheral architecture as their flash-based PIC16F74 cousins. Key differentiating features include the integrated 8-channel 8-bit ADC, three timer modules, USART, SSP, and CCP. The 14-bit instruction word and 35-instruction set keep code density high, and the Harvard architecture with separate program and data buses allows single-cycle instruction execution except for program branches. Architecturally, the PIC16C74A uses CMOS EPROM cell technology for program storage and a RISC pipeline that fetches and executes most instructions in a single oscillator cycle. The 10 MHz oscillator corresponds to a 100 ns instruction cycle, and the 8-bit data path keeps arithmetic and I/O operations deterministic, which simplifies real-time control loop design. Typical applications include industrial control panels, sensor signal conditioning, motor control front-ends, appliance controllers, and small user-interface boards where the integrated ADC and multiple timers reduce bill-of-material cost versus external ADC plus discrete timer solutions. When migrating designs, note that the PIC16F74-I/PT flash equivalent shares the same 44-pin TQFP footprint but differs in program memory technology (flash vs. OTP) and offers in-circuit programmability - this is the recommended modern successor per the Microchip product page. Designers of new products should prefer the flash variant. This page synthesizes distributor inventory, drop-in same-family alternatives, and design notes not found in the bare datasheet - making part selection faster than reading the manufacturer's full 200+ page document cover-to-cover.

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PIC16C74A-10/PT

PIC16C74A-10/PT - 8-bit MCU, 7KB OTP, 33 I/O, 44-TQFP | Microchip

The Microchip Technology PIC16C74A-10/PT is an 8-bit CMOS microcontroller from 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 pins. The -10 speed grade designates a 10 MHz maximum operating frequency at 5V, packaged in a 44-lead Thin Quad Flat Pack (TQFP / PT) suited for surface-mount industrial and commercial designs. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/Flash/OTP), data memory (RAM), and peripheral set on one die; the PIC mid-range family adds Harvard architecture with separate program and data buses, enabling single-cycle instruction fetch and deterministic timing ideal for embedded control loops. The PIC16C74A sits in the PIC16C7X sub-family, distinguished by an integrated 8-channel 8-bit Analog-to-Digital converter, two capture/compare/PWM modules, a synchronous serial port (SSP) for SPI/I2C, and a USART, all on a 44-pin footprint. Key features include 7KB OTP program memory, 192 bytes RAM, 33 I/O, an integrated 8-channel 8-bit ADC, two CCP modules for PWM or capture/compare, and a USART for asynchronous or synchronous serial communication. The OTP memory allows one-time field programming, useful for cost-sensitive production runs where flash reprogramming is not required. Architecturally, the PIC16C74A uses a 14-bit instruction word and a RISC core with 35 single-word instructions, allowing most instructions to execute in one instruction cycle (200 ns at 20 MHz / 400 ns at 10 MHz). The integrated ADC simplifies sensor-interface designs and eliminates external converter cost, while the CCP modules support motor-control and PWM-driven lighting applications. Typical applications include industrial control, motor control, sensor interfacing, embedded instrumentation, and consumer devices where an 8-bit MCU with integrated ADC suffices. Designers migrating to flash-based parts can consider the recommended PIC16F74 (mentioned on the Microchip product page as a newer version). When designing with this part, note that OTP memory cannot be erased or rewritten, so firmware must be fully validated before programming. The 44-TQFP package is recommended for applications with limited board area, and designers should follow Microchip application notes for in-circuit programming and oscillator selection. This page synthesizes distributor pricing, drop-in compatible alternatives, and practical design considerations not found in the bare manufacturer datasheet.

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PIC16C74A-10E/L

PIC16C74A-10E/L - 8-Bit 10MHz 7KB OTP MCU 44-PLCC | Microchip

The Microchip Technology PIC16C74A-10E/L is a 8-bit CMOS RISC microcontroller from the PIC16C7X mid-range family, featuring 7KB of one-time-programmable (OTP) program memory, 192 bytes of RAM, and an integrated 8-channel 8-bit A/D converter. Housed in a 44-pin PLCC (J-Lead) package, it operates at up to 10 MHz clock speed with an instruction cycle of 200 ns and supports a supply voltage range of 4.0 V to 5.5 V. An 8-bit microcontroller (MCU) is a small computer-on-a-chip containing a CPU, program memory, data RAM, and peripherals. The PIC16C family uses a Harvard RISC architecture with 35 single-word instructions, where all instructions execute in a single cycle except program branches (two cycles). This MCU category sits at the foundation of embedded control, bridging discrete logic and modern 32-bit processors, and is widely used in cost-sensitive industrial and consumer applications. Key features include 22 I/O pins, three timer/counters, two capture/compare/PWM modules, a synchronous serial port (SSP) supporting SPI and I2C, a USART with addressable transmit/receive buffers, a parallel slave port, and an 8-bit A/D converter with 8 input channels. The device also includes a watchdog timer with its own on-chip RC oscillator for reliable operation, an in-circuit serial programming (ICSP) interface, and Power-on Reset / Brown-out Reset circuitry. Typical applications include industrial control and instrumentation, automotive body electronics, sensor signal conditioning, motor control with PWM, smart sensor hubs, and low-cost consumer appliances. The integrated A/D and PWM peripherals allow direct interfacing to analog sensors and brushed DC or stepper motors without external glue logic, simplifying board design and reducing BOM cost. When designing with this part, note that the '-10E' suffix denotes a 10 MHz extended temperature grade (-40C to +125C) speed rating, and the 'L' suffix identifies the 44-pin PLCC windowed/ceramic package. The OTP memory means code is programmed once and cannot be changed, making this part suitable for mature production designs rather than iterative prototyping.

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PIC16C74A-10E/P

PIC16C74A-10E/P - 8-Bit OTP MCU, 7KB ROM, 10MHz, 40-DIP | Microchip

The Microchip PIC16C74A-10E/P is an 8-bit CMOS microcontroller based on the PIC16CXX mid-range core, featuring 7KB (4K x 14) One-Time-Programmable (OTP) program memory, 192 bytes of RAM, 33 digital I/O lines, and an integrated 8-channel 8-bit Analog-to-Digital Converter (ADC). It operates at up to 10 MHz instruction rate from a 2.5V to 6.0V supply and is housed in a 40-pin PDIP (0.600", 15.24mm) through-hole package with extended temperature grade (-40C to +125C). The "E" suffix designates the extended industrial temperature range, and the "/P" suffix indicates the PDIP package. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, I/O peripherals, and timers onto one piece of silicon. Within the broader taxonomy, the PIC16C74A belongs to the PIC16 mid-range 8-bit MCU family, which itself sits under 8-bit microcontrollers -> microcontrollers -> microcontrollers and microprocessors -> semiconductors -> integrated circuits. PIC16 mid-range parts are RISC-based, Harvard-architecture devices with separate program and data buses, and they target cost-sensitive embedded control applications. Key features of the PIC16C74A-10E/P include two 8-bit timer/counters and one 16-bit timer/counter with capture/compare/PWM, a synchronous serial port (SSP) supporting SPI and I2C, a USART for asynchronous serial communication, an 8-bit ADC with 8 input channels, a watchdog timer with on-chip RC oscillator, and 25 mA source/sink current capability per I/O pin suitable for direct LED driving. It supports 14-bit wide instruction words with 35 single-word instructions, an 8-level deep hardware stack, and power-managed sleep mode with 1 uA typical standby current at 3V/32 kHz. The PIC16C74A architecture uses an OTP EPROM program memory cell which is one-time-programmable by the user, making the part well suited to mature production runs where firmware has stabilized. Unlike the flash-based PIC16F74 successor, the 'C' (CMOS EPROM) variant cannot be electrically erased, so each die is committed at first programming. Brown-out reset, power-on reset, and code-protection fuses round out the safety features. Typical applications include industrial automation controllers, HVAC control boards, motor control front-ends, automotive body and chassis ECUs, appliance control boards, sensor signal conditioning, and simple user-interface controllers. The 33 I/O and integrated ADC allow direct interface to keypads, switches, potentiometers, thermistors, and other analog sensors without external glue logic. Design consideration: ensure the OTP programming step is executed at the contract manufacturer with locked code-protection bits, because OTP memory cannot be re-balled once sealed. When designing for automotive AEC-Q100, source the /P extended-temperature grade from approved lots only and confirm PPAP documentation with Microchip. This page synthesizes distributor stock levels, OTP MCU replacement strategies, and practical design notes not found in the manufacturer datasheet - including a side-by-side comparison with the recommended flash-based successor PIC16F74-I/P and warnings on OTP programming logistics.

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PIC16C74A-10E/PQ

PIC16C74A-10E/PQ - 8-bit 10MHz OTP MCU, 44-QFP | Microchip

The Microchip Technology PIC16C74A-10E/PQ is an 8-bit CMOS OTP (One-Time Programmable) microcontroller from the PIC16C7X mid-range family, featuring 7 KB of program memory (4K x 14), 192 bytes of RAM, and an integrated 8-channel 8-bit A/D converter. It operates at 10 MHz and is housed in a 44-pin QFP package, with a wide 2.5 V to 6.0 V operating voltage range and an extended operating temperature grade of -40 °C to +125 °C. The device includes 33 digital I/O pins, two 8-bit timers and one 16-bit timer, a synchronous/asynchronous USART, and a parallel slave port for external memory interfacing. The PIC16C7X family sits within the broader hierarchy of PIC mid-range microcontrollers, which in turn belongs to the 8-bit RISC MCU category. An 8-bit microcontroller integrates a CPU core, non-volatile program memory, working RAM, peripheral set, and I/O on a single die, enabling compact embedded designs where board space, cost, and predictable real-time response matter more than raw compute throughput. OTP versions target cost-sensitive high-volume applications where field re-programmability is not required. Key features of the PIC16C74A include a 14-bit instruction word with single-cycle execution except for branches, an interrupt controller with context saving, power-saving SLEEP mode with typical standby current of 1 µA at 3 V / 32 kHz and 15 µA at 5 V / 4 MHz, and high sink/source drive capability of 25 mA per I/O line suitable for direct LED or relay driving. Capture/Compare/PWM modules support motor and power-control loops, while the synchronous serial port (SSP) implements both SPI and I²C master/slave operation. Typical applications include industrial control front-ends, automotive body and HVAC modules, white-goods and appliance control boards, instrumentation, and consumer products requiring on-board A/D conversion and serial connectivity. The 44-QFP footprint also supports designs migrating from the older 40-pin PIC16C7x family when additional I/O or ADC channels are needed. When designing with this part, remember that OTP memory cannot be reprogrammed in-circuit, so firmware verification should be completed on a windowed or flash equivalent (e.g. PIC16F74) before committing to OTP. Decoupling, oscillator layout, and MCLR reset discipline follow standard PIC mid-range guidance from the manufacturer datasheet. This page synthesizes distributor pricing, drop-in alternative MPNs, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C74A-10I/L

PIC16C74A-10I/L - 8-Bit 10MHz OTP MCU 7KB | 44-PLCC | Microchip

The Microchip Technology PIC16C74A-10I/L is an 8-bit CMOS RISC microcontroller from the PIC16C7X mid-range family, featuring 7KB of one-time-programmable (OTP) program memory, 192 bytes of RAM, and 33 digital I/O lines, housed in a 44-pin PLCC (J-Lead) package. It operates at up to 10 MHz clock speed with a 4V to 5.5V supply voltage and integrates an 8-channel 8-bit ADC, two 8-bit and one 16-bit timer/counter modules, a USART, and a synchronous serial port (SSP) supporting SPI and I2C. What is an 8-bit OTP microcontroller? An OTP MCU integrates a CPU core, program memory (one-time-programmable EPROM that can be written once), RAM, peripherals, and I/O into a single chip. Within the broader hierarchy, the PIC16C74A belongs to: microcontroller -> embedded MCU -> 8-bit MCU -> CMOS RISC MCU -> PIC16C7X mid-range family -> Microchip PIC16 family -> Microchip 8-bit portfolio -> semiconductor. The 8-bit RISC architecture with 35 single-word instructions enables compact, deterministic code execution ideal for real-time control. Key features include 7KB (4K x 14) OTP program memory, 192 bytes of data RAM, 33 I/O pins with individual direction control, two CCP (Capture/Compare/PWM) modules, a watchdog timer with its own on-chip RC oscillator, power-on reset, brown-out detection, and an in-circuit serial programming (ICSP) interface. The 44-PLCC package provides a robust through-hole-mount form factor with a J-lead footprint. The PIC16C74A uses a Harvard architecture with separate program and data buses, allowing instruction fetch and operand access in a single cycle (except program branches). At 10 MHz the instruction cycle is 100 ns, and most instructions complete in one cycle, yielding up to 10 MIPS throughput for real-time control loops. The integrated 8-bit ADC provides 8 input channels with selectable reference voltage. Typical applications include industrial automation controllers, motor control (stepper and DC brushed), automotive body electronics (note: not AEC-Q100 qualified), HVAC control boards, security and fire-alarm panels, and embedded sensor-interface nodes. The 33 I/O and integrated ADC suit applications that previously required external logic or multiple ICs. Design consideration: The OTP memory means code cannot be erased; for prototyping, consider the PIC16F74 (Flash) or PIC16C74B-20I/L (UV-erasable CERDIP windowed). Brown-out detect must be enabled for reliable operation in noisy industrial environments; the watchdog timer should be enabled for safety-critical applications. This page synthesizes distributor pricing, same-package drop-in alternatives, and practical design notes not found in the bare manufacturer datasheet, providing a single engineering reference for the PIC16C74A-10I/L.

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PIC16C74A-10I/P

PIC16C74A-10I/P - 10MHz 8-Bit OTP MCU 7KB ROM 40-PDIP | Microchip

The Microchip Technology PIC16C74A-10I/P is an 8-bit CMOS OTP (One-Time-Programmable) microcontroller from the PIC16C7X mid-range family, operating at up to 10 MHz and packaged in a 40-pin PDIP through-hole form factor. It integrates 7 KB of program memory, 192 bytes of data RAM, 33 digital I/O lines, an 8-channel 8-bit ADC, two capture/compare/PWM modules, a USART, and a synchronous serial port, all on a single die fabricated in CMOS technology. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and configurable peripherals on one silicon die. MCUs sit at the top of the embedded computing hierarchy alongside FPGAs and microprocessors; within the MCU family, the PIC16C7X belongs to Microchip's mid-range architecture, which is widely used in industrial control, instrumentation, and consumer products where deterministic instruction execution and ease of programming outweigh raw throughput. Key features of the PIC16C74A-10I/P include a 10 MHz maximum clock frequency, four voltage supply options (4.0 V to 5.5 V typical, 4.0 V to 6.0 V wide range), 25 mA source/sink current per I/O pin, an instruction set reduced to 35 single-word instructions, and all single-cycle instructions except for program branches (two cycles). Power consumption is conservatively rated at 5 µA typical standby at 3 V/32 kHz and 15 µA typical at 5 V/4 MHz, supporting battery-backed and low-duty-cycle applications. The device is built around the PIC16CXX mid-range core with a Harvard architecture, integrating an 8-bit A/D converter, two 16-bit timer/counters, a watchdog timer, brown-out reset, and in-circuit serial programming support via the ICSP interface. The OTP program memory allows the device to be programmed once with application code, after which it behaves like a masked-ROM part, making the PIC16C74A a cost-effective solution for medium-volume embedded designs. Typical applications include industrial process control, motor control subsystems, instrumentation front-ends, HVAC controllers, and automotive body/comfort modules. The integrated ADC and PWM peripherals allow direct interface to analog sensors and brushed DC motors, reducing external component count. The wide commercial/industrial/extended temperature ranges and high sink/source capability suit harsh-environment designs. When designing with this part, ensure your programmer supports OTP (not just flash) devices and budget for one-time programming per unit. OTP cannot be erased, so verify code in a flash equivalent (such as PIC16F74) before committing to PIC16C74A production programming. This page synthesizes distributor pricing, drop-in same-brand alternatives, and design guidance not consolidated on any single manufacturer or distributor page, giving engineers a one-stop source for PIC16C74A-10I/P selection.

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PIC16C74A-10I/PQ

PIC16C74A-10I/PQ - 8-bit OTP MCU 7KB 33 I/O 44-MQFP | Microchip

The Microchip Technology PIC16C74A-10I/PQ is an 8-bit RISC microcontroller from the PIC16C7X mid-range family, delivering 7 KB of one-time-programmable (OTP) program memory, 192 bytes of RAM, and 33 digital I/O lines in a 44-pin Metric Quad Flat Pack (MQFP / PQ) package with industrial temperature grading. The -10 speed grade denotes a 10 MHz maximum oscillator frequency and the /I suffix confirms -40C to +85C industrial operation, making it suitable for harsh-environment embedded control. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O on one die. Mid-range 8-bit MCUs like the PIC16C7X sit in the hierarchy: MCU -> embedded controller -> semiconductor; they balance cost, deterministic performance, and code density for tasks that do not require 32-bit throughput. The PIC16C7X family added integrated 8-bit A/D converters to the mid-range lineup, distinguishing it from earlier 16C5X/16C6X parts. Key features include 14-bit instruction word with Harvard architecture, 8-level deep hardware stack, integrated 8-channel 8-bit A/D converter, two 8-bit and one 16-bit timers, synchronous/asynchronous serial port (USART), parallel slave port, and brown-out reset plus watchdog timer for safety-critical applications. CMOS fully-static design allows operation down to DC clock, conserving power in sleep states below 1 uA typical. Typical applications include industrial automation (sensor conditioning, motor drive logic), automotive subsystems (climate control, instrument clusters), consumer electronics (white goods controllers, remote controls), and embedded control nodes requiring deterministic interrupt response without RTOS overhead. The 33 I/O and 8-channel ADC remove the need for external I/O expanders in mid-complexity designs. When migrating designs, note the PIC16C74A is OTP-based - firmware must be committed at programming time and cannot be field-updated. Microchip recommends migrating to the flash-based PIC16F74 equivalent for new designs; the PIC16F74 maintains pin and peripheral compatibility, enabling drop-in firmware porting with minimal risk. Key design considerations include the oscillator configuration (XT, HS, RC, LP modes), required decoupling on VDD/VSS pairs, and MCLR pull-up impedance. OTP programming requires a high-voltage (13V typical) VPP pulse during device programming - production programmers must support this algorithm. This page synthesizes verified distributor pricing, drop-in-compatible same-package alternatives, and practical design notes beyond what the manufacturer datasheet provides, including lifecycle status and recommended migration paths to flash-based MCUs.

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PIC16C74A-10I/PT

PIC16C74A-10I/PT - 8-bit OTP MCU, 7KB Flash, 10MHz, 44-TQFP

The Microchip Technology PIC16C74A-10I/PT is an 8-bit CMOS microcontroller from the PIC16C7X family, offering 7 KB (4K x 14) of one-time programmable (OTP) program memory, 192 bytes of RAM, and 33 digital I/O pins in a 44-pin TQFP package. The device operates at up to 10 MHz and features an integrated 8-channel, 8-bit A/D converter, two 8-bit timers, one 16-bit timer with capture/compare/PWM, a USART, an SPI/I2C-compatible synchronous serial port, and a watchdog timer. An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, an ALU, program memory, and a rich set of peripherals. Within the broader microcontroller taxonomy, PIC16C74A sits in the legacy OTP CMOS mid-range tier: 8-bit MCU -> mid-range PIC -> PIC16C7X family -> PIC16C7X sub-family with A/D. The 'C' suffix indicates one-time programmable EPROM-based program memory, while 'A' designates a silicon revision of the original PIC16C74 die that added brown-out detect, oscillator start-up timer, and other reliability enhancements. Key specifications include 200 ns instruction cycle at 10 MHz, 14-bit wide instruction word, 192-byte data RAM, 33 I/O pins with individual direction control, and a wide 2.5V-6.0V operating voltage range. Industrial temperature grade (-40C to +85C) is indicated by the 'I' suffix. The on-chip A/D converter has 8 input channels with 8-bit resolution. Three timer modules and a hardware USART provide versatile control and communication capability. The PIC16C74A-10I/PT architecture uses a Harvard RISC core with separate program and data buses, allowing simultaneous instruction fetch and operand access. CMOS process technology delivers low power consumption, typically under 2 mA active at 5V/10 MHz and a few microamps in sleep mode, making it well suited to battery-powered and industrial control designs that require deterministic instruction timing. Typical applications include industrial control systems, automotive body electronics, appliance controllers, security alarm panels, and instrumentation front-ends. The integrated A/D and PWM peripherals are particularly useful for closed-loop motor control, sensor signal conditioning, and switched-mode power supply supervisory functions. Migration to PIC16F74 (Flash) is recommended for new designs because the PIC16C74A is OTP and not field-reprogrammable. When designing with this device, reserve a brown-out reset supervisor or use the internal BOR circuit, and place decoupling capacitors within 5 mm of VDD/SS pins. Programming the OTP memory requires a high-voltage (13V typical) programming mode, so plan the test/access fixture to support in-system programming only if you implement the parallel programming algorithm via the ICSP pins. This page synthesizes distributor pricing, drop-in pin-compatible alternatives (including the recommended PIC16F74 migration path), and practical design notes not found in the manufacturer datasheet.

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PIC16C74A-20/L

PIC16C74A-20/L - 8-Bit 20MHz OTP MCU 7KB | Microchip | PLCC-44

The Microchip Technology PIC16C74A-20/L is an 8-bit CMOS one-time-programmable (OTP) microcontroller from the PIC16C family, featuring 7KB (4K x 14) of program memory, 192 bytes of RAM, and 33 digital I/O pins in a 44-pin PLCC (J-lead) package. It executes instructions at a 20 MHz clock rate with a 200 ns instruction cycle and operates across a 4.0 V to 5.5 V supply range. A PIC microcontroller is a compact programmable processor based on a Harvard RISC architecture that separates program and data memory for deterministic, single-cycle instruction execution. PIC16C-series MCUs sit in the hierarchy: microcontroller -> 8-bit MCU -> embedded controller -> semiconductor. They are widely used in cost-sensitive embedded designs where deterministic timing, low power consumption, and easy programmability outweigh the need for large memory or modern peripherals. Key features include 35 single-word instructions (all single-cycle except two-cycle program branches), high sink/source current capability of 25 mA/25 mA per pin suitable for direct LED or relay drive, integrated analog peripherals, and three hardware timer/counter modules. The PIC16C74A-20/L also provides a USART, MSSP (SPI/I2C) port, 8-channel 8-bit ADC, capture/compare/PWM modules, and a programmable brown-out reset. The PIC16C74A architecture uses an 8-level deep hardware stack and separate instruction/data buses. The OTP program memory is one-time programmable - once written it cannot be erased, distinguishing it from UV-erasable CERDIP variants in the family. Power consumption is exceptionally low: 15 uA typical at 5 V / 4 MHz and 1 uA typical standby at 3 V / 32 kHz. Typical applications include industrial control logic, appliance controllers, automotive subsystems, sensor signal conditioning front-ends, and low-cost embedded products. The wide operating voltage range (2.5 V-6.0 V per family datasheet) and broad temperature grades make it suitable for both commercial and extended-environment designs. When designing with this part, note that OTP memory cannot be re-programmed - use the CERDIP/JW windowed variant for prototype development. The A newer Flash-based PIC16F74 is pin-compatible and recommended for new designs. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C74A-20/PQ

PIC16C74A-20/PQ - 8-Bit 20MHz OTP MCU w/ A/D | Microchip 44-MQFP

The Microchip Technology PIC16C74A-20/PQ is an 8-bit RISC CMOS microcontroller with a 20 MHz clock speed, 7 KB (4K x 14) one-time-programmable (OTP) program memory, and an integrated analog-to-digital converter, housed in a 44-pin Metric Quad Flat Pack (MQFP, 10x10 mm) windowed CERDIP-style package with gull-wing leads. It belongs to the PIC16C7X family in the PIC mid-range architecture, executing 35 single-word instructions with single-cycle execution except for two-cycle program branches. A microcontroller (MCU) is a single-chip computer containing a CPU, program memory, working RAM, I/O peripherals, and (in this case) an A/D converter on one die. PIC16C7X mid-range MCUs sit in the taxonomy: microcontroller -> embedded controller -> 8-bit MCU -> PIC mid-range -> PIC16C7X family. The 'C' suffix denotes OTP EPROM program memory, and 'A' marks the silicon revision; the -20 speed grade runs up to 20 MHz at 4.0 V to 5.5 V supply. Key features include 192 bytes of data RAM, 22 digital I/O lines, an 8-channel 8-bit A/D converter, three timers (Timer0, Timer1, Timer2 with PWM), a USART/SCI asynchronous serial port, an SPI/I2C synchronous serial port, 13 interrupt sources, and a watchdog timer with on-chip RC oscillator for reliable operation. The architecture uses a Harvard design with separate program and data buses, allowing instruction fetch and operand read in the same cycle. Typical applications include industrial process control, instrumentation front-ends, embedded sensor hubs, and low-cost motor control where on-chip A/D conversion and PWM generation eliminate external components. When migrating, Microchip recommends the flash-based PIC16F74 as the modern equivalent with identical pinout and peripheral set. Industrial users designing around the C-series should note the OTP windowed package supports limited reprogramming during development and that the part has been superseded by flash-based F-series for new designs.

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PIC16C74A-20/PT

PIC16C74A-20/PT - 8-Bit 20MHz OTP MCU 7KB Flash 44-TQFP | Microchip

The Microchip Technology PIC16C74A-20/PT is an 8-bit PIC16C-series microcontroller with a 20 MHz maximum clock, 7 KB (4K x 14) of one-time-programmable (OTP) program memory and 192 bytes of RAM, housed in a 44-pin TQFP (10 x 10 mm) package. The 'A' revision of the original PIC16C74 brings improvements in ADC performance, peripheral feature set and electrical characteristics while preserving instruction-set and pin compatibility with the legacy PIC16C7x family. Background - what is an OTP PIC16C microcontroller. An 8-bit OTP microcontroller is a Harvard-architecture CMOS device that executes one instruction per instruction cycle (200 ns at 20 MHz), offers 35 single-word instructions, and stores the program code in one-time-programmable EPROM rather than flash. PIC16C parts sit between simple PIC10/12/16 base-line devices and the flash-based PIC18 mid-range family, and were Microchip's mainstream mid-range 8-bit controller from the mid-1990s through the early 2000s before being superseded by flash PIC16F variants. Key features of the PIC16C74A-20/PT include: 33 digital I/O pins, an 8-channel 8-bit ADC, two CCP modules, a USART, an MSSP (SPI / I2C) port, three timers, a watchdog timer with on-chip RC oscillator, and a brown-out reset. The 20 MHz oscillator speed corresponds to a 200 ns instruction cycle, suitable for real-time control loops up to a few kHz. The device operates from 4.0 V to 6.0 V across 0 C to +70 C commercial temperature range (this -20/PT suffix indicates 20 MHz, commercial temp, TQFP package). Internal architecture uses a 14-bit instruction word with 8-bit data path, providing predictable interrupt latency of 5 instruction cycles and a single-level hardware stack depth of 8, which limits nested subroutine depth. Typical applications include industrial control panels, appliance controllers, automotive body electronics, sensor signal conditioning, low-cost motor control and embedded data acquisition. The PIC16C74A is also widely used in legacy designs and educational labs. A critical design consideration: OTP memory cannot be erased, so firmware must be fully validated before programming - the flash-based PIC16F74 is the recommended modern substitute when in-field firmware updates are needed. This page consolidates distributor pricing, parametric drop-in alternatives, and design guidance that goes beyond the manufacturer's datasheet to support engineers sourcing legacy PIC16C74A inventory.

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PIC16C74A-20E/P

PIC16C74A-20E/P - 8-Bit 20MHz 7KB OTP MCU 40-PDIP | Microchip

The Microchip Technology PIC16C74A-20E/P is a high-performance 8-bit CMOS microcontroller from the PIC16CXX mid-range family, offering 7KB (4K x 14 words) of One-Time-Programmable (OTP) program memory, 192 bytes of RAM, and 33 general-purpose digital I/O pins in a 40-pin PDIP through-hole package. It operates at a maximum clock speed of 20 MHz with an instruction cycle time of 200 ns and integrates an 8-channel, 8-bit Analog-to-Digital (A/D) converter along with a Capture/Compare/PWM (CCP) module, a USART, and a synchronous serial port (SSP) supporting SPI and I2C. An 8-bit microcontroller is a single-chip computer with an 8-bit data bus and ALU that executes instructions one byte at a time. PIC mid-range microcontrollers sit between PIC baseline and PIC enhanced families in the Microchip taxonomy: PIC baseline -> PIC mid-range -> PIC enhanced -> dsPIC -> PIC32. The PIC16C7X family specifically targets applications requiring integrated analog and digital peripherals in a single device, bridging the gap between simple PIC16C5x baseline controllers and more powerful PIC17C parts. Key features of the PIC16C74A-20E/P include a wide 4V to 6V operating range, an extended industrial temperature grade ("-E" suffix = -40C to +125C), 15 interrupt sources, a watchdog timer with its own on-chip RC oscillator, a programmable 8-bit prescaler, and power-saving SLEEP mode. The device uses a RISC architecture with only 35 single-word/single-cycle instructions, simplifying embedded firmware development and reducing code size for cost-OTP ROMs. Architecturally, the PIC16C74A-20E/P employs a Harvard architecture with separate 14-bit program memory and 8-bit data memory buses, allowing instruction fetch and data access to occur simultaneously each clock cycle. This dual-bus design delivers near-1 MIPS per MHz throughput, while the OTP EPROM process technology enables rapid prototyping and low-volume production without the mask-programming tooling investment required by ROM-based PICs. Typical applications for the PIC16C74A-20E/P include industrial process control systems, motor control and HVAC equipment, instrumentation and data acquisition modules, automotive body and chassis subsystems, security and alarm panels, and general-purpose embedded control where integrated A/D plus USART plus I/O eliminate the need for external peripherals. The 40-pin PDIP form factor is convenient for prototype through-hole assembly. A key design consideration is the "/P" suffix designating 40-pin PDIP through-hole mounting versus the "/L" (PLCC) or "/PQ" (MQFP) variants; pin-compatible OTP replacements with the same -20 speed grade and -E temperature range are the primary drop-in options. Designers should also note that Microchip recommends migrating to the flash-based PIC16F74 for new designs since PIC16C OTP parts are legacy devices with limited long-term supply continuity. This page synthesizes distributor stock and pricing data, same-package drop-in alternatives, application guidance, and design notes not consolidated on any single manufacturer or distributor page, giving engineers a single reference for evaluating the PIC16C74A-20E/P for both new designs and legacy maintenance.

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PIC16C74A-20E/PQ

PIC16C74A-20E/PQ - 8-Bit CMOS MCU, 7KB OTP, 33 I/O | Microchip

The Microchip PIC16C74A-20E/PQ is an 8-bit CMOS RISC microcontroller from the PIC16C7X mid-range family with 7KB of one-time-programmable (OTP) EPROM program memory, 192 bytes of RAM, and an integrated 8-channel 8-bit analog-to-digital (A/D) converter. Housed in a 44-pin Metric Quad Flat Pack (MQFP) and operating up to 20 MHz from 4.0 V to 6.0 V, the device delivers 5 MIPS of throughput while consuming only 15 µA typical standby current at 5 V / 4 MHz and 1 µA typical at 3 V / 32 kHz. An 8-bit microcontroller is a single-chip computer built around an 8-bit data path, integrating CPU, program memory, RAM, and peripherals into one IC. It belongs to the broader hierarchy of microcontrollers -> microcontrollers (MCU) -> embedded computing -> semiconductors. The PIC16C7X family specifically targets cost-sensitive embedded control designs requiring on-chip A/D conversion, timers, synchronous/asynchronous serial ports, and parallel I/O in a single device. Key features include 33 digital I/O pins across five ports, 25/25 mA high sink/source current capability per pin, an instruction set of only 35 single-word instructions with all single-cycle except program branches (two cycles), and three timer/counter modules. Brown-out reset and a watchdog timer enhance field reliability. The 'E' suffix indicates the extended industrial temperature range of -40 °C to +125 °C. Architecture-wise, the PIC16C74A-20E/PQ uses a Harvard RISC core with a 14-bit instruction word and separate program and data buses, allowing instruction fetch and operand access in one cycle. The integrated successive-approximation A/D converter supports 8 channels with 8-bit resolution, and dual analog comparators plus a Capture/Compare/PWM module make it suitable for closed-loop control. Typical applications include industrial process control nodes, automotive body controllers (extended temp), appliance motor control, smart sensor signal conditioning, and embedded data acquisition systems. The high-current I/O allows direct LED and relay drive without buffers. When designing with this part, ensure Vdd decoupling with a 100 nF ceramic close to the pins and respect the maximum clock frequency (20 MHz at 4.0–6.0 V). OTP memory cannot be re-programmed in-circuit, so production programming via ICSP is required. This page synthesizes distributor pricing, drop-in alternatives from the same PIC16C7X family, and practical design notes not found in the original Microchip datasheet.

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PIC16C74A-20I/L

PIC16C74A-20I/L - 8-Bit 20MHz OTP MCU 7KB | Microchip

The Microchip Technology PIC16C74A-20I/L 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, all housed in a 44-pin PLCC (J-Lead) package. It executes instructions at a 20 MHz clock rate with a wide operating voltage range of 2.5V to 6.0V, integrated 8-channel 8-bit A/D converter, and three timer/counters including capture/compare/PWM modules. The “-20” suffix denotes 20 MHz maximum clock speed, “I” denotes the industrial temperature range (-40°C to +85°C), and “L” designates the 44-PLCC windowed/ceramic leadless chip carrier package. An 8-bit microcontroller (MCU) is a single-chip microcomputer containing a CPU, memory, and peripherals on one die, executing instructions on 8-bit data words. Within the broader taxonomy, the PIC16C74A belongs to the mid-range 8-bit MCU category, itself part of the microcontroller family of embedded processors within the semiconductor hierarchy. OTP memory permits one-time programming during production but cannot be erased afterwards; for erasable variants, Microchip recommends the PIC16F74 Flash-based equivalent. Key features of the PIC16C74A-20I/L include high sink/source current of 25/25 mA per I/O, low-power consumption (5 µA typical standby at 3V/32 kHz, 15 µA at 5V/4 MHz), a high-performance RISC architecture with only 35 single-word instructions to learn, and all instructions execute in a single cycle except program branches (two cycles). The integrated peripherals include a synchronous serial port (SSP) for SPI/I2C, a USART for asynchronous serial communication, and a parallel slave port for external bus interfaces. The device is built on a fully-static CMOS process, allowing clock frequencies from DC up to 20 MHz without internal oscillator overhead. The 8-bit A/D converter with 8 input channels enables direct interfacing with analog sensors, while the 192-byte RAM supports small data buffers for real-time control loops. OTP program memory provides cost-effective one-time programming suitable for mature production designs. Typical applications include industrial control systems, automotive body electronics, appliance controllers, sensor signal conditioning nodes, and embedded data acquisition modules. The 33 I/O pins and integrated ADC make it particularly suitable for multi-channel sensor monitoring applications. When designing with the PIC16C74A-20I/L, verify MCLR reset circuitry and use a 1 µF decoupling capacitor on VDD within 1 cm of the device; the OTP memory cannot be field-updated, so development should use the Flash-based PIC16F74 equivalent before committing to OTP production parts. This page synthesizes distributor stock and pricing snapshots (as of 2026-09-18), drop-in compatible alternatives in the same 44-PLCC footprint, and practical design notes not found in the original 1997-vintage manufacturer datasheet.

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PIC16C74A-20I/P

PIC16C74A-20I/P - 8-bit 20MHz OTP MCU 7KB | Microchip DIP-40

The Microchip PIC16C74A-20I/P is an 8-bit RISC CMOS OTP microcontroller operating at 20 MHz, integrating 7 KB (4K x 14) of one-time-programmable program memory and 192 bytes of RAM, housed in a 40-pin PDIP through-hole package. It is part of Microchip's mid-range PIC16C7X family and provides 33 digital I/O lines, an on-chip 8-channel 8-bit A/D converter, two 8-bit timers plus one 16-bit timer, a synchronous serial port (SSP) for SPI/I2C, a USART, capture/compare/PWM (CCP) modules, and a watchdog timer. Industrial-grade -40C to +85C operation and 25/25 mA high sink/source current make it suitable for embedded control designs. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and peripheral interfaces on one silicon die. The PIC16C7X family uses Microchip's enhanced Harvard RISC architecture with 35 single-word instructions, where all instructions execute in one cycle except program branches which take two; this streamlined instruction set reduces code size and improves deterministic interrupt response compared with CISC 8-bit MCUs. Key features include 7 KB OTP program memory (4K x 14 words), 192 bytes of SRAM data memory, an 8-channel 8-bit A/D converter, two CCP modules for PWM/capture/compare, a USART for asynchronous serial communication, and an MSSP module supporting SPI and I2C. Power consumption is 15 uA typical at 5 V / 4 MHz and 1 uA typical standby at 3 V / 32 kHz, supporting battery-backed designs. The architecture is fully static CMOS with a 14-bit instruction word, allowing DC to 20 MHz operation. With 35 single-word instructions, single-cycle execution (200 ns at 20 MHz) and a 4-cycle hardware multiplier (8 x 8 in one instruction), the PIC16C74A delivers approximately 5 MIPS throughput. The 8-bit A/D converter uses successive-approximation conversion with analog input multiplexing, allowing direct connection of sensors without external sample-and-hold. Typical applications include industrial automation controllers, motor drive PWM stages, sensor signal conditioning, instrumentation front-ends, consumer appliance controllers, and embedded communication bridges. For new designs, Microchip recommends the flash-based PIC16F74 as the modern drop-in equivalent with in-system reprogrammability. Design consideration: OTP memory means firmware is programmed once and cannot be erased - choose the PIC16F74 for prototypes or field-upgradable firmware. Ensure the MCLR reset circuit uses the recommended RC configuration per the datasheet for reliable power-on reset. This page synthesizes distributor pricing, drop-in alternatives, and engineering design guidance not always presented together in the manufacturer datasheet.

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PIC16C74A-20I/PQ

PIC16C74A-20I/PQ - 8-Bit 20MHz 7KB OTP MCU 44-MQFP | Microchip

The Microchip Technology PIC16C74A-20I/PQ is an 8-bit CMOS RISC microcontroller from the PIC16C7X mid-range family, offering 7KB (4K x 14) of One-Time-Programmable (OTP) program memory, 192 bytes of RAM, and 33 digital I/O lines in a 44-pin Metric QFP (MQFP 10x10) package. Operating at up to 20 MHz from a 4.0V to 6.0V supply, it integrates a 12-channel 8-bit ADC, two 8-bit timers plus one 16-bit timer/counter, a synchronous/asynchronous USART, and a 16-bit Capture/Compare/PWM (CCP) peripheral - delivering high-performance 8-bit control for embedded designs. What is a PIC mid-range microcontroller? PIC microcontrollers are RISC-based 8-bit CMOS MCUs from Microchip Technology built on a Harvard architecture that separates program and data memory. The "mid-range" PIC16 family sits between baseline PIC10/12/16 and enhanced PIC18 devices, balancing instruction density, peripheral integration, and cost. Each instruction word is 14 bits wide and most execute in a single cycle, giving 20 MHz PICs roughly 5 MIPS of throughput - ideal for motor control, instrumentation, and consumer-electronics applications. Key features include the 44-pin Metric QFP (MQFP 10x10mm) surface-mount footprint, industrial -40C to +85C temperature grade (denoted by the "I" suffix), and brown-out reset / power-on reset / watchdog timer for robust field reliability. The device is windowed-EPROM/OTP based, making it suitable for prototyping and low-to-medium volume production. Its 33 I/O pins can source/sink up to 25 mA each, sufficient for direct LED and relay drive in many control circuits. Technically, the PIC16C74A implements a 14-bit instruction set with an 8-level hardware stack, vectored interrupts, and a multiplier that performs 8x8 in one cycle. The integrated 12-channel 8-bit ADC can be used for sensor conditioning; the USART enables RS-232/RS-485 communications. Compared to its predecessor PIC16C74, the -A silicon revision adds improved ADC accuracy and an extended instruction set. Typical applications include industrial process control, sensor signal acquisition, motor drive control, automotive body electronics, security systems, and embedded instrumentation. The wide operating voltage and -40C to +85C industrial temperature range also suit HVAC controllers and machine-tool interfaces. When designing with this device, ensure adequate decoupling (100 nF per supply pin plus a 10 uF bulk capacitor), reserve a 4-pin ICP header for in-circuit programming, and confirm that your supply stays within the 4.0V to 6.0V range. Note that the part is OTP - firmware is fixed at the first programming cycle. This page synthesizes distributor availability, drop-in PIC16C74B and PIC16F74 flash-based upgrades, and practical design notes beyond what the manufacturer datasheet alone offers.

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PIC16C74AT-04/PQ

PIC16C74AT-04/PQ - 8-Bit 4MHz OTP MCU 7KB 44-MQFP | Microchip

The Microchip Technology PIC16C74AT-04/PQ is an 8-bit RISC microcontroller from the PIC16CXX mid-range family, featuring 7 KB (4K x 14) of One-Time-Programmable (OTP) program memory, 192 bytes of RAM, and a 4 MHz maximum operating frequency, housed in a 44-pin Metric Quad Flat Pack (MQFP, 10x10 mm) package supplied on Tape & Reel. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/OTP/Flash), data memory (RAM), and a set of peripheral interfaces on one die. PIC16C-series MCUs sit in Microchip's mid-range architecture hierarchy (PIC10/12/16/18 families), where they supersede the baseline PIC16C5X and are themselves superseded by the PIC18 enhanced 8-bit family. Their position in the broader taxonomy is: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC. Key features of the PIC16C74AT-04/PQ include an 8-channel, 8-bit successive-approximation Analog-to-Digital Converter (ADC), 33 digital I/O lines, and serial connectivity through I2C, SPI, and UART/USART peripherals. The 04 speed grade limits the oscillator input to 4 MHz at 5 V, and the device operates across a 3.0 V to 6.0 V supply range per the PIC16C74A datasheet. The 'T' suffix denotes Tape & Reel packaging, and 'PQ' designates the 44-pin MQFP (10x10 mm) footprint. Architecturally, the PIC16C74AT-04/PQ uses a Harvard RISC core with separate program and data buses, a 14-bit wide instruction word, and a single accumulator (W register). This simplified architecture, combined with 35 single-word instructions, allows most instructions to execute in a single instruction cycle (4 oscillator clocks), giving roughly 1 MIPS of throughput at 4 MHz - adequate for control-loop, sensor-interface, and human-machine-interface applications. Typical applications include industrial process control, sensor signal conditioning, embedded control boards, instrumentation front-ends, and legacy consumer-electronics controllers. Engineers use the PIC16C74A family wherever a 5 V, 8-bit mid-range MCU with on-chip ADC and multiple serial ports is needed without paying for a flash-based MCU. Note that OTP memory requires a device programmer and cannot be reprogrammed in-circuit. When designing with this part, plan for the OTP programming model: code must be verified on a windowed or FLASH prototype part (e.g. PIC16F74A in the same 44-pin QFP) before committing to OTP production units. Always check the latest Microchip product change notifications, as the original PIC16C OTP family has been progressively migrated to PIC16F flash parts over the last decade. This page synthesizes current distributor pricing, pin-compatible alternatives, and practical design notes - information not collated in the manufacturer datasheet alone.

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PIC16C74AT-04/PT

PIC16C74AT-04/PT - 8-bit MCU 7KB OTP 33 I/O 4MHz TQFP44 | Microchip

The Microchip Technology PIC16C74AT-04/PT is an 8-bit EPROM-based CMOS microcontroller featuring 7KB of one-time-programmable (OTP) program memory, 192 bytes of RAM, and 33 digital I/O pins, housed in a 44-pin TQFP (PT) surface-mount package. It operates from a 4V to 6V supply with a 4 MHz oscillator input and delivers 5 MIPS peak performance through its RISC Harvard architecture with 35 single-word instructions. Integrated peripherals include an 8-channel 8-bit Analog-to-Digital Converter (ADC), a Universal Synchronous/Asynchronous Receiver/Transmitter (USART), a Master Synchronous Serial Port (MSSP) supporting SPI and I2C, two 8-bit timers and one 16-bit timer with capture/compare/PWM, and a watchdog timer. A microcontroller (MCU) is a single-chip computer containing a processor core, program memory, working RAM, and integrated peripherals. Microcontrollers sit within the broader hierarchy of: microcontroller -> embedded processor -> semiconductor IC. The PIC16C74A belongs to the PIC16 mid-range family, which uses a 14-bit instruction word and a Harvard memory architecture that separates program and data buses for deterministic execution. OTP and EPROM-based PIC16C devices were the predecessors of today's flash-based PIC16F parts, and they remain in use for legacy industrial and embedded designs where the program code is finalized in production. Key differentiating features of the PIC16C74AT-04/PT include its integrated 8-channel 8-bit ADC, dual-capture/compare/PWM modules with a 16-bit timer, and the MSSP peripheral that supports both SPI and I2C communication. The 33 I/O pins are organized across five ports (PORTA through PORTE), providing flexible mixed-signal interfacing. The 4 MHz maximum oscillator frequency is appropriate for cost-sensitive and low-power applications that do not require higher computational throughput. The TQFP-44 package with 0.80 mm pitch allows reflow soldering on standard SMT lines. Architecturally, the PIC16C74A uses an enhanced mid-range core with a hardware multiplier, an 8-level deep stack, and interrupt-driven I/O. Its EPROM program memory is one-time-programmable via a UV-erasable windowless package, allowing rapid prototyping with production-cost OTP units. The integrated brown-out detect and power-on reset reduce external component count, while the watchdog timer with on-chip RC oscillator improves field reliability. Typical applications include industrial control logic, automotive body electronics, sensor interfaces, low-end motor control, simple human-machine interfaces, and embedded data acquisition systems. The 8-bit ADC and serial peripherals suit battery chargers, HVAC controllers, and appliance controllers. Engineers commonly deploy the PIC16C74A where code stability, long-life production parts, and proven toolchains outweigh the need for higher-speed modern cores. When designing with this part, allocate the OTP programming step into the production flow: PIC16C OTP cannot be erased in-circuit. The MSSP peripheral requires careful pin remapping for SPI versus I2C modes, and the ADC reference selection (VDD or external) must be set in software before the first conversion. Pin-compatible flash-based PIC16F74A parts exist for prototyping. This page synthesizes distributor stock, parametric alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC16C74AT-04E/L

PIC16C74AT-04E/L - 8-bit 4MHz OTP MCU, 7KB, 44-PLCC | Microchip

The Microchip Technology PIC16C74AT-04E/L is an 8-bit CMOS RISC microcontroller from the PIC16C7X mid-range family with 7KB One-Time Programmable (OTP) program memory, 192 bytes of RAM, and 33 general-purpose I/O pins in a 44-pin PLCC package. It operates at 4MHz from a 5V supply, integrates a multi-channel A/D converter, and provides I2C, SPI, and UART/USART serial interfaces. An 8-bit OTP microcontroller is a single-chip computer with non-volatile program memory (One-Time Programmable) that executes instructions on 8-bit wide data paths, designed for embedded control where firmware is finalized at production time and not field-updatable. PIC microcontrollers sit within the broader taxonomy: microcontroller -> embedded processor -> semiconductor -> integrated circuit; the PIC16C family represents Microchip's classic mid-range core using a Harvard architecture with separate program and data buses, optimized for deterministic interrupt response and low-power standby. Key features include 7KB (4K x 14) OTP program memory, 192 bytes of data RAM, 33 digital I/O lines, an 8-channel 8-bit A/D converter, three timer modules, a synchronous serial port (SSP) supporting SPI and I2C, and a USART for asynchronous serial communication. The device draws a typical operating current in the low milliamp range at 4MHz and supports power-managed sleep modes to extend battery life in portable designs. The PIC16C7X architecture uses a 14-bit instruction word, single-cycle execution for most instructions (excluding branches), and a hardware stack for subroutine/interrupt context saving. The integrated A/D converter is based on a successive-approximation register (SAR) topology with analog input multiplexing, enabling direct connection to sensors without an external ADC chip. Automotive-grade 'E' temperature rating extends operation from -40C to +125C. Typical applications include industrial control systems, automotive body and powertrain sub-assemblies, appliance control boards, and instrumentation front-ends. The integrated A/D converter is particularly valuable in measurement applications such as temperature monitoring, motor speed sensing, and analog signal acquisition. When designing with this MCU, note that OTP memory cannot be reprogrammed - select a Flash-based PIC16F or PIC18 equivalent for in-application firmware updates. The 44-PLCC package requires a socket or careful soldering; plan PCB layout with adequate clearance around the larger J-leaded footprint. This page synthesizes distributor pricing, drop-in alternatives, and engineering design notes not found in the manufacturer datasheet alone, providing a complete reference for engineers evaluating or sourcing the PIC16C74AT-04E/L for new designs or legacy maintenance.

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PIC16C74AT-04E/PQ

PIC16C74AT-04E/PQ - 8-Bit 4MHz OTP MCU 44-MQFP | Microchip

The Microchip Technology PIC16C74AT-04E/PQ is a member of the PIC16C7X mid-range family of 8-bit CMOS microcontrollers, featuring 7KB (4K x 14) of One-Time-Programmable (OTP) program memory, 192 x 8 bytes of SRAM, and 33 programmable I/O pins, all housed in a 44-pin Metric Quad Flat Pack (MQFP, 10x10 mm). The device operates at a 4MHz oscillator frequency across a 4V to 6V supply range and an industrial -40C to +125C temperature window, with a maximum instruction cycle time of 250 ns at 4MHz. What is an 8-bit OTP microcontroller? An OTP (One-Time-Programmable) microcontroller is a type of embedded MCU whose program memory can be written exactly once at production or pre-production time, after which the bit pattern is permanent. Unlike flash-based MCUs, OTP parts cannot be erased or rewritten, making them cost-optimized for high-volume fixed-code applications such as appliance controllers, automotive sub-modules, and industrial sensor interfaces. The PIC16C74AT sits within the broader taxonomy of: microcontroller -> embedded controller -> semiconductor -> integrated circuit. Key feature highlights include an integrated 8-channel, 8-bit Analog-to-Digital Converter (ADC), three hardware timers (Timer0, Timer1, Timer2), a Capture/Compare/PWM (CCP) module, and a Universal Synchronous/Asynchronous Receiver-Transmitter (USART) port. Brown-out Reset, Power-on Reset, and a Watchdog Timer provide robust supply and code-flow supervision. The 4MHz maximum oscillator speed yields a 1 MIPS instruction throughput at 4MHz, sufficient for sensor sampling and motor control loops. The PIC16C74AT-04E/PQ uses Microchip's mature mid-range 14-bit instruction set with a Harvard architecture, separating program and data buses for deterministic single-cycle instruction execution. The OTP memory cell uses EPROM technology, packaged in a windowless MQFP suitable for surface-mount assembly. Typical applications include industrial control panels, HVAC actuator controllers, automotive body and comfort modules, and consumer white-goods main boards. The wide supply and temperature ranges allow use in 5V regulated industrial buses. When designing with this MCU, ensure the oscillator circuit matches the 4MHz specification and place decoupling capacitors within 5mm of each power pin. OTP memory must be programmed by a certified device programmer before final PCB assembly - field firmware updates are not possible on this part. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet.

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PIC16C74AT-04I/L

PIC16C74AT-04I/L - 8-Bit 4MHz OTP MCU 7KB 33 I/O | Microchip

The Microchip Technology PIC16C74AT-04I/L is an 8-bit 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 lines in a 44-pin PLCC package measuring 16.59 mm x 16.59 mm. According to Microchip distributor data, the device runs at 4 MHz maximum clock speed, is fabricated on a fully-static CMOS process, and supports an operating temperature range of -40C to +85C for industrial-grade deployments. What is a PIC16C 8-bit microcontroller? The PIC16C family is Microchip's mid-range 8-bit MCU architecture that uses a Harvard-style separate program/data bus, a RISC instruction set, and integrated peripherals such as A/D converters. PIC16C sits in the hierarchy: PIC16C -> PIC16 mid-range -> 8-bit MCU -> microcontroller -> semiconductor. OTP (One-Time-Programmable) variants are programmed once at production time and are typically used where code stability, low unit cost, and short programming lead times outweigh the need for in-field re-programmability. Key features of the PIC16C74AT-04I/L include 35 single-word instructions (most executing in a single instruction cycle except branches which take two cycles), an integrated 8-channel 8-bit A/D converter, three timer modules, a synchronous/asynchronous serial port (SSP) and a Universal Synchronous Asynchronous Receiver Transmitter (USART) for multi-protocol serial communication. The device operates from a 4V to 5.5V supply rail and provides 22 high-current I/O ports capable of directly driving LEDs and small relays. Architecturally, the PIC16C74A uses a 14-bit-wide program word and an 8-bit data path, with a hardware multiplier-free ALU optimized for low cost. The fully-static CMOS core eliminates the need for a minimum clock, allowing the MCU to be clocked down to DC for power-sensitive applications. Power-on reset, brown-out detection, watchdog timer with on-chip RC oscillator, and code protection fuses provide field-deployment robustness. Typical applications include industrial control logic boards, automotive body and chassis subsystems, appliance controllers, sensor interface front-ends, and embedded control modules where deterministic interrupt latency and proven long-term supply are critical. The PIC16C74AT-04I/L is shipped in Tape & Reel (T/R) form factor and is well suited for medium-volume production runs that require Microchip's classic mid-range toolchain (MPLAB IDE, MPASM assembler, ICD in-circuit debugging). When designing with this part, remember that OTP memory cannot be re-programmed, so production firmware must be fully validated before programming. Consider the PIC16F74 flash-based variant for prototyping and low-volume runs; consider the PIC16C74B-04I/L for enhanced silicon revisions while keeping the same 44-PLCC footprint. All variants share the same instruction set and pinout for drop-in compatibility. This page synthesizes distributor pricing, drop-in alternatives, parametric comparisons, and practical design notes not found in any single manufacturer or distributor listing - giving engineers a one-stop reference for the PIC16C74AT-04I/L.

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PIC16C74AT-04I/PQ

PIC16C74AT-04I/PQ - 8-Bit OTP MCU, 4MHz, 7KB | Microchip

The Microchip Technology PIC16C74AT-04I/PQ is an 8-bit CMOS RISC microcontroller from the PIC16C7X mid-range family, featuring 4 MHz CPU speed, 7 KB (4K x 14) of One-Time Programmable (OTP) program memory, 192 bytes of data RAM, and 33 digital I/O pins, housed in a 44-pin MQFP (10x10 mm) package. Background Knowledge: A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, and programmable I/O peripherals. The PIC16C family from Microchip uses a Harvard-architecture 8-bit RISC core with separate program and data buses, optimized for deterministic real-time control. Within the taxonomy MCU -> 8-bit MCU -> PIC mid-range -> PIC16C7X, this part sits as a mid-tier device with on-chip analog peripherals, targeting embedded control applications requiring both digital I/O and ADC sampling. Key features include an 8-channel, 8-bit Analog-to-Digital Converter (ADC), a USART for serial communication, an MSSP module for SPI/I2C, capture/compare/PWM peripherals, and an 8-bit timer/counter. The OTP memory allows one-time field programming via Microchip development tools, which lowers unit cost versus windowed EPROM parts in production volumes. The 'I' temperature suffix indicates the industrial-grade -40C to +85C operating range. Technical depth: The PIC16C74A core executes most instructions in a single 4-cycle oscillator period, equivalent to 1 microsecond per instruction at 4 MHz. The 14-bit instruction word and 8-bit data path define the mid-range PIC architecture. Brown-out reset, watchdog timer, and power-on reset provide robust operation in noisy industrial environments. The ADC supports 8 single-ended channels with 8-bit resolution, suitable for sensor monitoring rather than high-precision instrumentation. Typical applications include industrial control systems, appliance control boards, automotive body electronics (non-safety), motor control interfaces, and legacy embedded products requiring OTP-based firmware storage. The wide operating voltage range and industrial temperature grade suit 5V system designs. When designing with this part, account for OTP memory limitations - firmware must be fully validated before production programming since OTP cannot be erased. Use MPLAB IDE with the PIC16C compatible compiler toolchain for development. A 44-pin MQFP footprint requires careful PCB layout for the fine-pitch lead frame. This page synthesizes distributor stock, OTP MCU drop-in alternatives, and design notes not consolidated in the manufacturer datasheet, providing practical engineering guidance for sourcing and designing with this legacy Microchip part.

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PIC16C74AT-10/L

PIC16C74AT-10/L - 8-bit OTP MCU, 10MHz, 7KB EPROM | Microchip

The Microchip Technology PIC16C74AT-10/L is an 8-bit RISC microcontroller from the PIC16CXX mid-range family, offered in a 44-pin PLCC (J-lead) surface-mount package with 7KB (4K x 14) of One-Time Programmable EPROM program memory and 192 bytes of RAM. It operates at a maximum clock frequency of 10MHz, is fabricated on a fully-static CMOS process, and integrates a rich set of peripherals including an 8-channel 8-bit A/D converter, two 8-bit timers plus one 16-bit timer, a USART, MSSP (SPI/I2C), capture/compare/PWM modules, and 33 digital I/O lines, all packed into the PIC16C74A die. An OTP (One-Time Programmable) microcontroller is a member of the ROM-based MCU family in which program memory can be written once during production or pre-programming and then becomes read-only at run time. OTP parts sit hierarchically below flash-based MCUs and above mask-ROM variants in the broader taxonomy: microcontroller -> embedded MCU -> ROM/OTP/Flash microcontroller -> 8-bit mid-range PIC. Compared with flash parts, OTP offers lower per-unit cost at high volumes and is favored in mature, code-stable designs where firmware revisions are no longer required. Key features of the PIC16C74AT-10/L include a wide 4.0V to 6.0V supply voltage range, an instruction cycle of 200ns at 10MHz, Harvard architecture for separate program/data buses, and industrial-grade commercial operating temperature support. The on-chip A/D converter provides eight input channels at 8-bit resolution, supporting mixed-signal applications without an external ADC. Brown-out reset, power-on reset, watchdog timer with its own on-chip RC oscillator, and code protection are also standard. The device uses the PIC mid-range 14-bit instruction set, with 35 single-cycle instructions and an 8-level deep hardware stack. Interrupt handling is fully vectored with 14 sources, and the integrated USART plus MSSP support both asynchronous serial and synchronous SPI/I2C communications, eliminating many external glue-logic components. Typical applications include industrial control, motor drive command interfaces, instrument front-panel controllers, automotive body electronics (where the automotive-grade -40C to +125C variant is selected), HVAC controls, smart sensor hubs, and embedded control subsystems in mid-complexity appliances. In particular, the 44-pin PLCC footprint and rich peripheral mix make it well-suited as a glue controller that ties analog sensors and digital actuators to a host processor. When designing with this part, observe the OTP-programming flow: code is finalized and shipped to a programmer for one-time writes before PCB assembly. Allow a 4-cycle oscillator startup window for crystal-resonator modes and ensure MCLR is properly decoupled. The commercial temperature grade is suitable for most indoor industrial enclosures; specify the I-suffix variant for extended industrial and the E-suffix for automotive-grade deployments. This page synthesizes verified distributor pricing, drop-in alternatives, and practical design guidance not found in the standalone manufacturer datasheet.

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PIC16C74A-10/PQ - 8-bit OTP MCU, 7KB, 44-MQFP | Microchip

PIC16C74A-10/PT - 8-bit MCU, 7KB OTP, 33 I/O, 44-TQFP | Microchip

PIC16C74A-10E/L - 8-Bit 10MHz 7KB OTP MCU 44-PLCC | Microchip

PIC16C74A-10E/P - 8-Bit OTP MCU, 7KB ROM, 10MHz, 40-DIP | Microchip

PIC16C74A-10E/PQ - 8-bit 10MHz OTP MCU, 44-QFP | Microchip

PIC16C74A-10I/L - 8-Bit 10MHz OTP MCU 7KB | 44-PLCC | Microchip

PIC16C74A-10I/P - 10MHz 8-Bit OTP MCU 7KB ROM 40-PDIP | Microchip

PIC16C74A-10I/PQ - 8-bit OTP MCU 7KB 33 I/O 44-MQFP | Microchip

PIC16C74A-10I/PT - 8-bit OTP MCU, 7KB Flash, 10MHz, 44-TQFP

PIC16C74A-20/L - 8-Bit 20MHz OTP MCU 7KB | Microchip | PLCC-44

PIC16C74A-20/PQ - 8-Bit 20MHz OTP MCU w/ A/D | Microchip 44-MQFP

PIC16C74A-20/PT - 8-Bit 20MHz OTP MCU 7KB Flash 44-TQFP | Microchip

PIC16C74A-20E/P - 8-Bit 20MHz 7KB OTP MCU 40-PDIP | Microchip

PIC16C74A-20E/PQ - 8-Bit CMOS MCU, 7KB OTP, 33 I/O | Microchip

PIC16C74A-20I/L - 8-Bit 20MHz OTP MCU 7KB | Microchip

PIC16C74A-20I/P - 8-bit 20MHz OTP MCU 7KB | Microchip DIP-40

PIC16C74A-20I/PQ - 8-Bit 20MHz 7KB OTP MCU 44-MQFP | Microchip

PIC16C74AT-04/PQ - 8-Bit 4MHz OTP MCU 7KB 44-MQFP | Microchip

PIC16C74AT-04/PT - 8-bit MCU 7KB OTP 33 I/O 4MHz TQFP44 | Microchip

PIC16C74AT-04E/L - 8-bit 4MHz OTP MCU, 7KB, 44-PLCC | Microchip

PIC16C74AT-04E/PQ - 8-Bit 4MHz OTP MCU 44-MQFP | Microchip

PIC16C74AT-04I/L - 8-Bit 4MHz OTP MCU 7KB 33 I/O | Microchip

PIC16C74AT-04I/PQ - 8-Bit OTP MCU, 4MHz, 7KB | Microchip

PIC16C74AT-10/L - 8-bit OTP MCU, 10MHz, 7KB EPROM | Microchip