PIC18C452-I/PT Microchip Integrated Circuit (Other) In Stock
Microchip PIC18C452-I/PT is an 8-bit PIC18 microcontroller operating at up to 40 MHz with ROM-based OTP program memory and an integrated 10-bit ADC. It delivers high-performance RISC processing in a compact 44-pin TQFP package measuring 10 mm × 10 mm. Suited for production-committed embedded control and legacy industrial designs.
- Manufacturer
- Microchip
- Package
- Other
- Pin Count
- 44
- Lifecycle
- OBSOLETE
- Datasheet
- PIC18C452-I/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
- 40 MHz maximum clock delivering 10 MIPS throughput via the high-performance PIC18 RISC architecture
- Integrated 8-channel 10-bit ADC enabling direct analog sensor interfacing without external converters
- OTP ROM program memory offering one-time programmable code protection for volume production
- 44-pin 10 mm x 10 mm TQFP package supporting compact PCB layouts with a wide I/O count
Applications
The PIC18C452-I/PT is suited for committed production designs in industrial process control, appliance management, and automotive body electronics where one-time programmable OTP memory provides code security and eliminates Flash erase concerns. Its 40 MHz core with 10-bit ADC handles mixed-signal sensing tasks such as temperature measurement, current monitoring, and motor speed feedback within a single chip. Legacy system maintainers also source this device for in-field repair and board-level replacement of existing deployed equipment.
Specifications
| Pbfree Code | Yes |
| Date Of Intro | 1999-06-17 |
| YTEOL | 0 |
| Has ADC | YES |
| Bit Size | 8 |
| Boundary Scan | NO |
| CPU Family | PIC18 |
| Clock Frequency-Max | 40MHz |
| DAC Channels | NO |
| DMA Channels | NO |
| Format | FIXED POINT |
| Integrated Cache | NO |
| JESD-30 Code | S-PQFP-G44 |
| JESD-609 Code | e3 |
| Low Power Mode | YES |
| Number of External Interrupts | 3 |
| Number of I/O Lines | 34 |
| Number of Serial I/Os | 1 |
| Number of Timers | 6 |
| On Chip Data RAM Width | 8 |
| On Chip Program ROM Width | 16 |
| PWM Channels | YES |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TQFP44,.39SQ,31 |
| Package Shape | SQUARE |
| Package Style | FLATPACK, THIN PROFILE |
| Qualification Status | Not Qualified |
| RAM (bytes) | 1536 |
| ROM (words) | 16384 |
| ROM Programmability | OTPROM |
| Screening Level | TS 16949 |
| Speed | 40MHz |
| Supply Current-Max | 38mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 4.2V |
| 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 | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | 3A991.A.2 |
| HTS Code | 8542.31.00.01 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the PIC18C452-I/PT's OTP memory differ from Flash-based PIC18F alternatives in production use?
The PIC18C452 uses one-time programmable ROM rather than Flash, meaning firmware is permanently locked after programming. This suits high-volume production runs of 10,000 or more units where code is finalised, while PIC18F Flash variants are preferred for designs needing field firmware updates or iterative development cycles.
What is the ADC specification of the PIC18C452-I/PT, and which sensor types can it read directly?
The device integrates an 8-channel, 10-bit successive approximation ADC with a conversion time of approximately 1.6 µs at full clock speed, providing 4.88 mV resolution at a 5 V reference. This allows direct connection to resistive temperature sensors (NTC thermistors), potentiometers, pressure transducers, and current-sense shunt amplifiers.
At 40 MHz, what instruction throughput does the PIC18C452-I/PT deliver, and how does it affect real-time loop timing?
The PIC18 architecture executes most instructions in a single instruction cycle of 100 ns at 40 MHz, yielding 10 MIPS throughput. A typical PID control loop executing 200 instructions therefore completes in approximately 20 µs, meeting the cycle-time requirements of most servo and temperature control systems without needing a faster processor.
Is the PIC18C452-I/PT still manufactured, and how should procurement teams plan sourcing?
The PIC18C452 was introduced in 1999 and has a YTEOL of 0, indicating it is at end-of-life. Procurement teams should prioritise purchasing from authorised distributors with existing stock, consider last-time-buy orders to cover remaining production needs, or plan a migration to the pin-compatible PIC18F452 which offers Flash re-programmability and active manufacturing status.
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