PIC18LC452T-I/PT - 8-bit PIC18 MCU, 32KB OTP, 40MHz, 44-TQFP | Microchip
Teilenummer: PIC18LC452T-I/PT ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $14.85 | $14,85 |
| 10 | $13.42 | $134,20 |
| 100 | $11.93 | $1.193,00 |
| 500 | $10.74 | $5.370,00 |
| 1.000 | $9.5 | $9.500,00 |
PIC18LC452T-I/PT Übersicht
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, program memory, and peripherals on a single die; the PIC18 family is Microchip's high-performance 8-bit line with 16-bit-wide instructions and an 8-bit data path. The PIC18 sits within the broader taxonomy: PIC18 -> PIC family -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. The 'LC' suffix indicates the low-voltage CMOS variant optimized for 3.3V operation with extended industrial temperature range.
Key features include single-cycle hardware multiply, priority-level interrupts, four timer modules, two capture/compare/PWM modules, parallel slave port, and a 10-bit ADC with up to 8 channels. The instruction set is C-friendly with linear addressing of up to 64KB and a hardware multiply that completes in a single cycle, supporting arithmetic-intensive control code without DSP overhead.
The PIC18C452/PIC18LC452 architecture uses a Harvard-style bus with separate program and data memories, enabling simultaneous instruction fetch and data access. The 40MHz oscillator (with optional PLL) yields 10 MIPS throughput, and the wide 16-bit instruction word allows a single instruction to encode an operand plus a literal, reducing code size relative to von Neumann 8-bit cores.
Typical applications include industrial control, motor drive, instrumentation, sensor signal conditioning, embedded data acquisition, and human-machine-interface panels. The 33 I/O count makes it suitable for keypad scanning, LCD drive, and parallel bus peripherals, while the ADC plus USART and MSSP enable sensor-bus bridging.
When designing with this part, note that OTP is not user-reprogrammable in-circuit - the LC variant shares identical peripherals with PIC18C452 but is intended for low-voltage designs; flash-based PIC18F452 is the in-circuit reprogrammable sibling. Ensure decoupling per Microchip AN588 and respect Vdd/Vpp sequencing for production programming.
This page synthesizes distributor stock and a cross-reference of same-package TQFP-44 PIC18 family drop-ins and a cross-brand ATmega equivalent, plus design notes not found in the bare datasheet.
Drop-in-Alternativen für PIC18LC452T-I/PT – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit PIC18LC452T-I/PT (gleiche Bauform und Footprint) – abweichend in Package, Operating Temperature, ADC, Timers, I/O Pins.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
PIC18C452-I/PT
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
PIC18F452-I/PT
✅ Drop-In✓ Auf Lager
$5.84 / Stück
Datenblatt ansehen →PIC18F4520-I/PT
✅ Drop-In✓ Auf Lager
$4.05 / Stück
Datenblatt ansehen →PIC18F4620-I/PT
✅ Drop-In✓ Auf Lager
$5.45 / Stück
Datenblatt ansehen →PIC18F4550-I/PT
✅ Drop-In✓ Auf Lager
$4.95 / Stück
Datenblatt ansehen →PIC18F45K22-I/PT
✅ Drop-In✓ Auf Lager
$2.65 / Stück
Datenblatt ansehen →ATMEGA644PA-AU
✅ Drop-In✓ Auf Lager
$4.61 / Stück
Datenblatt ansehen →PIC18LC452T-I/PT Grenzwerte & elektrische Eigenschaften
| Core | PIC18 (8-bit RISC, Harvard) |
| Instruction Set Width | 16-bit instructions, 8-bit data path |
| Program Memory | 32 KB (16K x 16) OTP |
| RAM | 1.5 KB x 8 |
| EEPROM | 256 bytes |
| Maximale Taktfrequenz | 40 MHz |
| Performance | 10 MIPS |
| Operating Voltage | 3.0 V to 5.5 V (3.3V / 5V dual-rail) |
| I/O Pins | 33 |
| ADC | 10-bit, up to 8 channels |
| Timers | 4 (Timer0/1/2/3) |
| Capture/Compare/PWM | 2 CCP modules |
| Serial Interfaces | USART (SCI), MSSP (SPI / I2C), PSP |
| Interrupts | Priority-level, multiple sources |
| Hardware Multiplier | 8 x 8 single-cycle |
| Gehäuse | 44-pin TQFP (10 x 10 mm), Tape & Reel |
| Betriebstemperatur | -40 C to +85 C (Industrial, 'I' suffix) |
| Montageart | Surface Mount |
| MSL-Level | 3 (per JEDEC J-STD-020) |
| RoHS-Status | Compliant |
| Lead-Free | Yes |
PIC18LC452T-I/PT Pin-Konfiguration
| Pin 1 | MCLR/VPP — Master Clear (reset) input / programming voltage |
| Pin 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Pin 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / ADC VREF- |
| Pin 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC VREF+ |
| Pin 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 7 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / SPI slave select |
| Pin 8 | RE0/RD/AN5 — PORTE bit 0 / parallel slave port read / analog input 5 |
| Pin 9 | RE1/WR/AN6 — PORTE bit 1 / PSP write / analog input 6 |
| Pin 10 | RE2/CS/AN7 — PORTE bit 2 / PSP chip select / analog input 7 |
| Pin 11 | VDD — Positive supply voltage |
| Pin 12 | VSS — Ground reference |
| Pin 13 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| Pin 14 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| Pin 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pin 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 I/O |
| Pin 17 | RC2/CCP1 — PORTC bit 2 / CCP1 I/O |
| Pin 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pin 19 | RD0/PSP0 — PORTD bit 0 / parallel slave port bit 0 |
| Pin 20 | RD1/PSP1 — PORTD bit 1 / parallel slave port bit 1 |
| Pin 21 | RD2/PSP2 — PORTD bit 2 / parallel slave port bit 2 |
| Pin 22 | RD3/PSP3 — PORTD bit 3 / parallel slave port bit 3 |
| Pin 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 25 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| Pin 26 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| Pin 27 | RD4/PSP4 — PORTD bit 4 / parallel slave port bit 4 |
| Pin 28 | RD5/PSP5 — PORTD bit 5 / parallel slave port bit 5 |
| Pin 29 | RD6/PSP6 — PORTD bit 6 / parallel slave port bit 6 |
| Pin 30 | RD7/PSP7 — PORTD bit 7 / parallel slave port bit 7 |
| Pin 31 | VSS — Ground reference |
| Pin 32 | VDD — Positive supply voltage |
| Pin 33 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| Pin 34 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| Pin 35 | RB2/INT2 — PORTB bit 2 / external interrupt 2 |
| Pin 36 | RB3/CCP2 — PORTB bit 3 / CCP2 I/O |
| Pin 37 | RB4 — PORTB bit 4 (interrupt-on-change) |
| Pin 38 | RB5 — PORTB bit 5 (interrupt-on-change) |
| Pin 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 40 | RB7/PGD — PORTB bit 7 / ICSP data |
| Pin 41 | AVSS — Analog ground reference |
| Pin 42 | AVDD — Analog positive supply |
| Pin 43 | NC — Not connected (no internal bond) |
| Pin 44 | NC — Not connected (no internal bond) |
Typische Anwendungen
PIC18LC452T-I/PT ist geeignet für 7 Anwendungs: Industrial Control & Automation, Brushed-DC Motor & Stepper Drive, Data Acquisition & Instrumentation, Human-Machine Interface Panels, Sensor Signal Conditioning & Bridging, Appliance & Consumer Electronics, Educational & Embedded Learning Boards.
Industrial Control & Automation
The PIC18LC452T-I/PT fits industrial control panels thanks to its 40 MHz / 10 MIPS PIC18 core, 33 I/O count, and 10-bit ADC with up to 8 channels - sufficient to read multiple analog sensors, drive relays, and scan a 4x4 keypad. The 44-pin TQFP industrial-grade package handles -40 C to +85 C factory-floor temperatures, and 32 KB OTP holds typical ladder-style or state-machine control code without needing in-system updates. Compared with PIC18F452, the OTP variant lowers unit cost for sealed, non-serviceable appliance controllers; the LC variant supports 3.3 V logic rails used by modern sensors.
Empfohlen
Brushed-DC Motor & Stepper Drive
PIC18LC452T-I/PT's two CCP/PWM modules, four timers, and 33 I/O count map cleanly onto brushed-DC H-bridge control, including direction, enable, fault, current sense, and quadrature encoder inputs. The 10 MIPS core is sufficient to run PID loops at 1 kHz control rates while servicing RS-485 comms for supervisory control. Industrial-grade operation from -40 C to +85 C and 3.3 V/5 V tolerance ease integration with 24 V bridged gate drivers. Designers needing sinusoidal BLDC or FOC should step up to dsPIC33; for low-cost brushed-DC and stepper drives the PIC18LC452 is well matched.
Empfohlen
Data Acquisition & Instrumentation
With 33 I/O and a 10-bit ADC offering up to 8 input channels, PIC18LC452T-I/PT handles multi-channel sensor logging and front-panel instrumentation. The PIC18 core can DMA-free sample at rates set by Timer0/1, then buffer into 1.5 KB RAM before forwarding over USART or SPI to a host. Industrial temperature rating and OTP program memory suit sealed, factory-calibrated instruments where firmware does not change after deployment. Pair with external 16-bit ADCs over SPI for higher-precision systems, but for 10-bit standalone data loggers the on-chip ADC is sufficient.
Empfohlen
Human-Machine Interface Panels
The 33 I/O of PIC18LC452T-I/PT are ideal for scanning a 4x5 matrix keypad, driving character LCDs, and reading rotary encoders or potentiometers - the typical HMI subsystem of an industrial or appliance control panel. The PIC18's C-friendly architecture simplifies state-based menu code, and the 32 KB OTP holds fonts, menus, and translation tables. Operating at 3.3 V or 5 V makes it compatible with most character LCD modules. Use the parallel slave port to interface larger graphical LCDs when more bandwidth is required.
Empfohlen
Sensor Signal Conditioning & Bridging
PIC18LC452T-I/PT's 10-bit ADC, MSSP (SPI/I2C), and USART let it sit between analog sensors and a digital bus (RS-485, RS-232, or industrial Ethernet). At 10 MIPS the core can poll multiple sensors, run linearization or filtering, and bridge I2C sensor data to a Modbus RTU master. Industrial temperature range and 3.3 V operation simplify integration with low-power sensor nodes. The 44-pin TQFP gives ample GPIO for status LEDs, configuration switches, and serial debugging.
Empfohlen
Appliance & Consumer Electronics
PIC18LC452T-I/PT's low-voltage LC variant (2.5-5.5 V) and OTP-based pricing make it well suited to high-volume appliance controllers - washing machines, microwave ovens, dishwashers - where firmware is locked at production and unit cost dominates. The 33 I/O, two PWM modules, and 10-bit ADC cover motor control, user inputs, and sensor reads typical of these applications. Industrial temperature rating supports under-cabinet or garage-appliance environments. For designs where end-user firmware updates might be needed, PIC18F452-I/PT in the same 44-TQFP footprint is the drop-in flash alternative.
Empfohlen
Educational & Embedded Learning Boards
The PIC18LC452T-I/PT is widely used in 8-bit MCU training kits and university curricula because its peripheral set - timers, ADC, USART, SPI, I2C, CCP/PWM - covers essentially every common embedded concept in one device. The 32 KB OTP forces students to plan code size carefully, mirroring real low-cost embedded constraints, and the 40 MHz core leaves enough headroom for instructor demos. Although PIC18F452 is preferred for lab prototyping because flash allows ISP reprogramming, PIC18LC452 is useful for exercises in masked-ROM / OTP economics.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für PIC18LC452T-I/PT – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | PIC18C452-I/PT | PIC18F452-I/PT | PIC18F4520-I/PT | PIC18F4620-I/PT | PIC18F4550-I/PT | ATmega644PA-AU |
|---|---|---|---|---|---|---|---|
| Package | 44-pin TQFP (10x10 mm) | 44-pin TQFP (10x10 mm) - same | 44-pin TQFP (10x10 mm) - same | 44-pin TQFP (10x10 mm) - same | 44-pin TQFP (10x10 mm) - same | 44-pin TQFP (10x10 mm) - same | 44-pin TQFP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology (Atmel) |
| Program Memory | 32 KB OTP | 32 KB OTP | 32 KB Flash | 32 KB Flash | 64 KB Flash | 32 KB Flash | 64 KB Flash |
| Memory Type | OTP | OTP | Flash | Flash | Flash | Flash | Flash |
| Maximum Clock | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 48 MHz | 20 MHz |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 (with USB) | 32 |
| Operating Voltage | 2.5 V to 5.5 V | 4.2 V to 5.5 V (5V only) | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 1.8 V to 5.5 V |
| ADC | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 13 channels | 10-bit, 13 channels | 10-bit, 13 channels | 10-bit, 8 channels |
| Core / MIPS | PIC18, 10 MIPS | PIC18, 10 MIPS | PIC18, 10 MIPS | PIC18, 10 MIPS | PIC18, 10 MIPS | PIC18, 12 MIPS | AVR, ~20 MIPS |
| Peripheral Highlights | USART, MSSP, 2 CCP, PSP | USART, MSSP, 2 CCP, PSP | USART, MSSP, 2 CCP, PSP | USART, MSSP, 2 CCP, PSP | USART, MSSP, 2 CCP, PSP | USART, MSSP, 2 CCP, USB 2.0 FS | 2 USART, SPI, TWI, 2 8-bit timers, 16-bit timer |
Wichtigste Unterscheidungsmerkmale
- OTP-only programming for lowest per-unit cost (vs. PIC18F452-I/PT)
- Low-voltage 2.5-5.5V operation (vs. PIC18C452-I/PT)
- Compact 10x10mm TQFP for high-density boards (vs. PIC18F452-I/P (DIP-40))
Designhinweise
Decouple both VDD pairs (pins 11/12 and 31/32) and AVDD/AVSS (pins 41/42) with 100 nF ceramic capacitors placed within 5 mm of the respective pins, plus a bulk 10 uF tantalum or aluminum-polymer cap per Microchip AN588 'PIC MCU Power Supply Decoupling'. The AVDD supply should be tied to VDD through a ferrite bead or low-pass RC if the analog and digital rails are sourced separately. Estimated: at 40 MHz with all peripherals active, core current is on the order of 20-30 mA - budget at least 50 mA from the regulator for the MCU plus I/O switching.
Place a 1 kohm-10 kohm pull-up on MCLR (pin 1) per Microchip datasheet recommendation to allow normal operation; programming requires driving MCLR to VPP. Route the ICSP pins RB6/PGC (pin 39) and RB7/PGD (pin 40) to a 5-pin header without series resistors on the production PCB - the PICkit/MPLAB ICD tools use these pins and any inline resistor prevents successful programming. Keep the oscillator traces short: OSC1 (pin 13) and OSC2 (pin 14) should be within 12 mm of the crystal with a ground guard ring to minimize EMI susceptibility.
PIC18LC452T-I/PT is OTP (One-Time-Programmable) - firmware cannot be erased or rewritten. Any code bug after programming is permanent; the part cannot be recovered. For prototypes or field-updatable designs, use flash-based PIC18F452-I/PT (pin-for-pin compatible) instead. Also note that configuration bits (oscillator, watchdog, MCLR, brownout) are programmed into OTP and must be verified before production runs - incorrectly setting CONFIG1H or CONFIG2L can lock out programming entirely.
PORTB pins RB4-RB7 are interrupt-on-change capable but have weak CMOS outputs; for driving LEDs or relays use a buffer such as ULN2803 or FET driver. The MSSP SPI bus pins SCK/SDI/SDO can be remapped to multiple pins; ensure firmware config matches the chosen pins to avoid bus contention. The parallel slave port (PORTD plus RE0/RE1/RE2) shares pins with general I/O - configure TRIS/PSP mode carefully to prevent bus contention with external memory or LCD modules.
Compliance-Informationen
RoHS compliant per Microchip product page; industrial temperature grade -40 C to +85 C. AEC-Q100 not applicable (consumer/industrial MCU, not automotive-qualified).
