PIC16C74B-04I/PQ Microchip Integrated Circuit (Quad Flat Packages) In Stock
The PIC16C74B-04I/PQ is an 8-bit EPROM-based PIC16 microcontroller running at up to 4 MHz with integrated ADC in a Quad Flat Package. It offers a proven RISC architecture with multiple I/O ports and analog inputs for legacy embedded control designs. Available worldwide for replacement and maintenance of installed industrial and consumer systems.
- Manufacturer
- Microchip
- Package
- Quad Flat Packages
- Pin Count
- 44
- Lifecycle
- NOT RECOMMENDED
- Datasheet
- PIC16C74B-04I/PQ 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 PIC16 RISC CPU clocked at up to 4 MHz
- On-chip EPROM program memory for field-programmable designs
- Integrated ADC for direct analog signal acquisition
- Multiple I/O ports for parallel peripheral control
- Quad Flat Package (QFP) for surface-mount assembly
- Industrial temperature range (-40°C to +85°C) for rugged deployments
Applications
The PIC16C74B-04I/PQ targets legacy embedded control systems in industrial automation, consumer appliances, and automotive accessories that require an 8-bit EPROM-based controller. Its built-in ADC and broad I/O complement make it a direct fit for sensor interfacing, motor speed control, and simple HMI panels designed around the PIC16 architecture. It is primarily sourced for maintenance and repair of existing fielded equipment rather than new designs.
Specifications
| Pbfree Code | Yes |
| Date Of Intro | 1990-01-01 |
| YTEOL | 3 |
| Has ADC | YES |
| Bit Size | 8 |
| Boundary Scan | NO |
| CPU Family | PIC16 |
| 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 |
| Number of Timers | 3 |
| On Chip Program ROM Width | 14 |
| PWM Channels | YES |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | QFP44,.5SQ,32 |
| Package Shape | SQUARE |
| Package Style | FLATPACK |
| 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 (Sn) |
| 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 |
| ECCN | EAR99 |
| HTS Code | 8542.31.00.01 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What clock frequency does the PIC16C74B-04I/PQ support, and is that sufficient for typical legacy control loops?
The PIC16C74B-04I/PQ runs at a maximum clock frequency of 4 MHz, delivering approximately 1 MIPS of 8-bit processing throughput. For most legacy PLC ladder-logic scans, UART communication at 9600 baud, and simple analog control loops with a 10 ms sample period, 4 MHz is more than adequate.
Does the PIC16C74B-04I/PQ include an ADC, and how many analog input channels are available?
Yes, the PIC16C74B-04I/PQ integrates an on-chip ADC with 8 analog input channels, allowing direct connection to sensors such as thermistors, potentiometers, and pressure transducers without an external converter. This simplifies BOM and PCB layout for 8-bit embedded designs requiring basic analog measurement at low cost.
When should an engineer choose the PIC16C74B-04I/PQ over a modern PIC16F replacement for a repair scenario?
The PIC16C74B-04I/PQ is the correct choice when replacing a failed unit in fielded equipment that requires an exact pinout and electrical match for the original 4 MHz EPROM-based design, where requalifying new firmware on an updated PIC16F variant would be cost-prohibitive. Its QFP package, 8-bit core, and 4 MHz clock are pin-and-code compatible with the original board, avoiding costly system-level recertification.
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