PIC16C74B-04I/PT Microchip Integrated Circuit (Quad Flat Packages) In Stock
Microchip PIC16C74B-04I/PT is an 8-bit PIC microcontroller running at 4 MHz with 4 KB EPROM, 192 bytes RAM, 8-channel 8-bit ADC, and USART, SPI, and I2C peripherals in a 44-pin TQFP package. Features three timers, CCP capture/compare module, and 33 I/O pins for cost-effective embedded control. Available from stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Quad Flat Packages
- Pin Count
- 44
- Lifecycle
- OBSOLETE
- Datasheet
- PIC16C74B-04I/PT Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-bit PIC RISC core at 4 MHz with 4 KB EPROM program memory and 192 bytes RAM for compact embedded controller designs
- 8-channel 8-bit ADC enabling simultaneous multi-sensor acquisition from analog inputs without external ADC ICs
- USART, SPI, and I2C on-chip communication peripherals with 33 I/O pins in a 44-pin TQFP package
Applications
The PIC16C74B-04I/PT is suited for consumer appliance control panels, industrial sensor interfaces, and motor speed controllers where an 8-bit 4 MHz RISC microcontroller with multi-channel ADC and serial communication covers all system requirements in a compact 44-pin TQFP footprint. Vending machine controllers, HVAC thermostats, and access control keypads use its USART and I2C peripherals to communicate with displays, RTC modules, and EEPROM over simple 2-wire buses. It is also deployed in legacy equipment maintenance and retrofit projects where a PIC16-family device is needed to match existing EPROM-based firmware without redesigning the hardware platform.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Has ADC | YES |
| Bit Size | 8 |
| Boundary Scan | NO |
| CPU Family | PIC |
| Clock Frequency-Max | 4MHz |
| DAC Channels | NO |
| DMA Channels | NO |
| JESD-30 Code | S-PQFP-G44 |
| JESD-609 Code | e3 |
| Number of I/O Lines | 33 |
| On Chip Program ROM Width | 14 |
| PWM Channels | YES |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TQFP44,.47SQ,32 |
| Package Shape | SQUARE |
| Package Style | FLATPACK, THIN PROFILE |
| Qualification Status | Not Qualified |
| RAM (bytes) | 192 |
| ROM (words) | 4096 |
| ROM Programmability | OTPROM |
| Screening Level | ISO/TS-16949 |
| Speed | 4MHz |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 4.5V |
| Supply Voltage-Nom | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | MATTE TIN |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.8mm |
| Terminal Position | QUAD |
| uPs/uCs/Peripheral ICs Type | MICROCONTROLLER, RISC |
| Package | Quad Flat Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| HTS Code | 8542.31.00.15 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for PIC16C74B-04I/PT:
RISC Microcontroller, 8-Bit, OTPROM, PIC16 CPU, 4MHz, CMOS, PDIP40
RISC Microcontroller, 8-Bit, OTPROM, PIC16 CPU, 4MHz, CMOS, PQFP44
Frequently Asked Questions
What processing speed and program memory does the PIC16C74B-04I/PT offer for embedded control tasks?
The PIC16C74B-04I/PT runs its 8-bit RISC core at up to 4 MHz, executing most instructions in a single 250 ns cycle with 4 KB of on-chip EPROM program memory and 192 bytes of data RAM. This combination is sufficient for PID control loops, keypad scanning, UART communication, and 8-channel ADC sampling in cost-constrained appliance and industrial controller applications.
How many ADC channels does the PIC16C74B-04I/PT include and what resolution do they provide?
The PIC16C74B-04I/PT integrates an 8-channel, 8-bit successive-approximation ADC, allowing the microcontroller to sample up to 8 independent analog signals — such as temperature sensors, potentiometers, and pressure transducers — without any external ADC IC. The 8-bit resolution yields 256 discrete steps over the reference voltage range, adequate for monitoring and control loops that do not require high measurement precision.
Which serial communication interfaces are available on the PIC16C74B-04I/PT for peripheral connectivity?
The PIC16C74B-04I/PT provides three on-chip serial interfaces: a hardware USART for RS-232 or RS-485 communication at standard baud rates up to 156 kbps at 4 MHz, a hardware SPI master/slave port at up to 1 MHz, and an I2C module supporting 100 kHz standard-mode bus operation for connecting EEPROMs, RTC chips, and sensor ICs directly without additional UART or SPI controller ICs.
When would an engineer choose the PIC16C74B-04I/PT over a more modern PIC16F device for a new design?
Engineers typically select the PIC16C74B-04I/PT for legacy compatibility maintenance — where existing EPROM-based firmware must run on hardware with the same 44-pin TQFP pinout and PIC16 instruction set — rather than for new designs. For a new 8-bit design, a PIC16F device with flash memory (re-programmable in-circuit at 3.3 V or 5 V) and higher ADC resolution offers better development flexibility, while the PIC16C74B-04I/PT suits OEM spare-part stocking for installed equipment in service for 10 or more years.
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