PIC17C42A-33E/PT - 33MHz 8-bit OTP MCU, 4KB, 44-TQFP | Microchip
N.º da peça: PIC17C42A-33E/PT ✗ Fim de vida| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $14.5 | $14,50 |
| 10 | $12.95 | $129,50 |
| 100 | $11.2 | $1.120,00 |
| 500 | $9.85 | $4.925,00 |
| 1.000 | $8.5 | $8.500,00 |
PIC17C42A-33E/PT Visão geral
An 8-bit microcontroller (MCU) is a single-chip computer that combines a CPU, non-volatile program memory, volatile data memory, and peripherals around an 8-bit data bus. Within the power management and embedded hierarchy, MCUs sit at the edge of the system alongside sensors and actuators: microcontroller -> embedded controller -> system-on-chip -> integrated circuit. PIC17C-family devices use a RISC instruction set with only 58 single-word instructions and are upwards source-compatible with the PIC16C5X, PIC12CXXX, and PIC16CXX devices.
Key features of the PIC17C42A include a 16-bit instruction word, an 8-level hardware stack, multiple interrupt sources with prioritized vectored interrupts, a watchdog timer, and a programmable code-protection mechanism on the OTP array. The device also integrates a timer/counter module with capture/compare/PWM capability, a synchronous serial port (SSP) compatible with SPI and I2C, and a USART for asynchronous serial communication.
The PT suffix denotes a 44-lead Thin Quad Flat Pack (TQFP, 10x10 mm body), engineered for surface-mount assembly in automated production lines. Operating voltage is 5V typical from a 4.0-6.0V supply range across the industrial -40C to +125C temperature window. The "E" speed/temperature designator indicates the Enhanced industrial grade, while "33" specifies the 33 MHz maximum oscillator frequency.
Typical applications for the PIC17C42A-33E/PT include industrial control systems, automotive body and chassis electronics, smart sensor interfaces, motor control front-ends, and embedded communication bridges. Its 33 I/O pins and PWM/timer resources make it well-suited to driving relays, LEDs, small brushed DC motors, and UART-connected peripherals in space-constrained designs.
When designing with this part, note that OTP memory cannot be reprogrammed in-circuit; for prototype iteration, choose the PIC17CR42 (ROM) or windowed EPROM variant. Decoupling VDD/VSS with 100 nF ceramic capacitors placed within 5 mm of each supply pin is strongly recommended, and unused I/O pins should be configured as outputs low to minimize power consumption.
This page synthesizes distributor pricing, drop-in PIC17C family alternatives, lifecycle status, and practical design notes that go beyond the bare datasheet to help engineers evaluate the PIC17C42A-33E/PT for both new designs and legacy maintenance.
Alternativas drop-in para PIC17C42A-33E/PT — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com PIC17C42A-33E/PT (mesmo formato e footprint) — diferindo em Package, Core Architecture, Operating Temperature Range, Program Memory Type, RAM Size.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC17C42A-33/PT
✅ Drop-In✓ Em estoque
$9.65 / unidade
Ver ficha técnica →PIC17C42AT-33I/PT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC17C42A-25/PT
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$5.55 / unidade
Ver ficha técnica →PIC17C42A-25E/P
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$5.6 / unidade
Ver ficha técnica →PIC17C42A-16E/P
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$5.85 / unidade
Ver ficha técnica →PIC17C42A-33E/PT Classificações máximas e características elétricas
| Core Architecture | PIC 8-bit RISC |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 4 KB (2K x 16) |
| RAM Size | 232 x 8 bytes |
| Maximum CPU Frequency | 33 MHz |
| Instruction Execution | 8.25 MIPS (121 ns/instruction) |
| Number of I/O Pins | 33 |
| Oscillator Type | External |
| Supply Voltage (VDD) | 4.0 V to 6.0 V (5 V typical) |
| Temperatura de operação | -40C to +125C (Enhanced "E" grade) |
| Encapsulamento | 44-pin TQFP (PT), 10 x 10 mm |
| Instruction Set Size | 58 single-word instructions |
| Hardware Stack Levels | 8 |
| Peripherals | Timer/CCP, SSP (SPI/I2C), USART, Watchdog Timer |
| Tipo de montagem | Surface Mount |
| Packaging | Tray |
Configuração de pinos do PIC17C42A-33E/PT
| Pino 1 | RC0 — PORT C bit 0 (digital I/O) |
| Pino 2 | RC1 — PORT C bit 1 (digital I/O) |
| Pino 3 | RC2 — PORT C bit 2 (digital I/O / CCP1) |
| Pino 4 | RC3 — PORT C bit 3 (digital I/O / SCL) |
| Pino 5 | RC4 — PORT C bit 4 (digital I/O / SDA) |
| Pino 6 | RC5 — PORT C bit 5 (digital I/O / SDO) |
| Pino 7 | RC6 — PORT C bit 6 (digital I/O / TX) |
| Pino 8 | RC7 — PORT C bit 7 (digital I/O / RX) |
| Pino 9 | OSC1 — Oscillator input (external clock) |
| Pino 10 | OSC2 — Oscillator output (crystal) |
| Pino 11 | MCLR — Master clear reset (active low) |
| Pino 12 | VDD1 — Positive supply voltage |
| Pino 13 | VSS1 — Ground reference |
| Pino 14 | RA0 — PORT A bit 0 (digital I/O / analog) |
| Pino 15 | RA1 — PORT A bit 1 (digital I/O / analog) |
| Pino 16 | RA2 — PORT A bit 2 (digital I/O / analog) |
| Pino 17 | RA3 — PORT A bit 3 (digital I/O / analog / VREF+) |
| Pino 18 | RA4 — PORT A bit 4 (digital I/O / analog) |
| Pino 19 | RA5 — PORT A bit 5 (digital I/O / analog) |
| Pino 20 | VSS2 — Ground reference |
| Pino 21 | VDD2 — Positive supply voltage |
| Pino 22 | RB0 — PORT B bit 0 (digital I/O / external interrupt) |
| Pino 23 | RB1 — PORT B bit 1 (digital I/O) |
| Pino 24 | RB2 — PORT B bit 2 (digital I/O) |
| Pino 25 | RB3 — PORT B bit 3 (digital I/O) |
| Pino 26 | RB4 — PORT B bit 4 (digital I/O) |
| Pino 27 | RB5 — PORT B bit 5 (digital I/O) |
| Pino 28 | RB6 — PORT B bit 6 (digital I/O / ICP) |
| Pino 29 | RB7 — PORT B bit 7 (digital I/O) |
| Pino 30 | RD0 — PORT D bit 0 (digital I/O / PSP) |
| Pino 31 | RD1 — PORT D bit 1 (digital I/O / PSP) |
| Pino 32 | RD2 — PORT D bit 2 (digital I/O / PSP) |
| Pino 33 | RD3 — PORT D bit 3 (digital I/O / PSP) |
| Pino 34 | RD4 — PORT D bit 4 (digital I/O / PSP) |
| Pino 35 | RD5 — PORT D bit 5 (digital I/O / PSP) |
| Pino 36 | RD6 — PORT D bit 6 (digital I/O / PSP) |
| Pino 37 | RD7 — PORT D bit 7 (digital I/O / PSP) |
| Pino 38 | RE0 — PORT E bit 0 (digital I/O) |
| Pino 39 | RE1 — PORT E bit 1 (digital I/O) |
| Pino 40 | RE2 — PORT E bit 2 (digital I/O) |
| Pino 41 | AVDD — Analog positive supply |
| Pino 42 | AVSS — Analog ground reference |
| Pino 43 | VREF — Voltage reference for ADC |
| Pino 44 | NC — Not connected (per datasheet) |
Aplicações típicas
PIC17C42A-33E/PT é adequado para 6 aplicaçãos: Industrial Control Systems, Automotive Body and Chassis Electronics, Smart Sensor Interface Hubs, Motor Control Front-Ends, Embedded Communication Bridges, Display and User-Interface Controllers.
Industrial Control Systems
The PIC17C42A-33E/PT is well suited to industrial control panels and PLC interfaces where its 33 I/O pins, 8.25 MIPS throughput, and -40C to +125C enhanced industrial temperature grade handle harsh factory environments. Its 4KB OTP memory stores ladder-logic-style control firmware, while the hardware CCP/PWM module drives relays, solenoids, and indicator LEDs directly. The USART and SSP peripherals connect to industrial RS-485, SPI sensors, and I2C EEPROM for configuration storage. The 44-pin TQFP (PT) package fits densely populated control boards, and the part's mature PIC17C architecture is widely documented in legacy factory automation reference designs.
Recomendado
Automotive Body and Chassis Electronics
In automotive body controllers, the PIC17C42A-33E/PT handles door modules, seat controllers, and lighting drivers thanks to its enhanced -40C to +125C temperature grade and 33 MHz throughput. The CCP/PWM channels drive small brushed DC motors for window lifts and mirror adjustments, while the USART interfaces with body control networks. The 33 I/O lines support multi-zone LED lighting with PWM dimming and switch-matrix scanning. Although the OTP memory requires pre-programming at the factory, its deterministic real-time response and 8-level hardware stack give it the deterministic interrupt latency needed for safety-critical body functions in legacy vehicle platforms.
Recomendado
Smart Sensor Interface Hubs
The PIC17C42A-33E/PT is an excellent hub MCU for sensor interface boards, aggregating signals from SPI and I2C sensors and exposing a USART or PWM output. Its synchronous serial port (SSP) directly interfaces with common digital sensors - the 4KB OTP memory holds calibration tables and linearization routines, while the 232-byte RAM buffers multi-sensor readings. The 33 MHz execution rate supports real-time sensor fusion at >1 kHz sampling. Its wide 4.0-6.0 V supply tolerance accepts raw battery or 5V regulated rails in instrumentation. The 44-pin TQFP (PT) footprint allows compact sensor modules with mixed analog/digital signal conditioning.
Recomendado
Motor Control Front-Ends
PIC17C42A-33E/PT front-ends small brushed DC and unipolar stepper motor control loops, providing 8.25 MIPS throughput for PI control algorithms and a hardware CCP module that generates the PWM drive signals. Its 33 I/O pins support multi-axis control with dedicated enable, direction, and fault lines per axis, while the USART streams telemetry to a host controller. The 4KB OTP memory stores tuning constants and ramp profiles. The -40C to +125C enhanced temperature grade handles the thermal stress of motor-driver proximity. Use the PIC17C42A-33/PT commercial variant for indoor equipment such as 3D printers and CNC accessories.
Recomendado
Embedded Communication Bridges
The PIC17C42A-33E/PT serves as a protocol bridge between legacy serial buses (RS-232, RS-485) and modern SPI/I2C peripherals. Its built-in USART handles async serial at standard baud rates up to 115.2 kbps and beyond, while the SSP module talks to contemporary SPI/I2C devices. The 33 MHz throughput and 232-byte RAM buffer packet translation in real time without flow-control loss. Bridge designs use the 33 I/O pins for status LEDs, DIP configuration switches, and test points. The OTP memory holds the protocol mapping firmware, and the 44-pin TQFP (PT) surface-mount package is suitable for high-volume assembly of industrial gateway products.
Recomendado
Display and User-Interface Controllers
For character LCD and LED matrix user interfaces, the PIC17C42A-33E/PT drives HD44780-compatible LCDs directly with its 8-bit PORTD bus and bit-bangs I2C for character OLED displays. Its 4KB OTP memory stores multi-language font tables and menu structures, while 232 bytes of RAM supports screen buffers. The 33 MHz execution rate updates 16x4 character LCDs without visible flicker and refreshes small LED matrices via multiplexing. The PWM module controls backlight brightness and indicator LED intensity. Use the PIC17C42A-25/PT for cost-reduced variants where 25 MHz is sufficient for the display refresh rate.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC17C42A-33E/PT — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC17C42A-33/PT | PIC17C42AT-33I/PT | PIC17C42A-25/PT | PIC17C42A-25E/P | PIC17C42A-16E/P |
|---|---|---|---|---|---|---|
| Package | 44-pin TQFP (PT), 10x10 mm | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same | 40-pin PDIP - differs (through-hole) | 40-pin PDIP - differs (through-hole) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Clock Frequency | 33 MHz | 33 MHz - same | 33 MHz - same | 25 MHz (-24%) | 25 MHz (-24%) | 16 MHz (-52%) |
| Program Memory | 4 KB OTP | 4 KB OTP - same | 4 KB OTP - same | 4 KB OTP - same | 4 KB OTP - same | 4 KB OTP - same |
| RAM Size | 232 bytes | 232 bytes - same | 232 bytes - same | 232 bytes - same | 232 bytes - same | 232 bytes - same |
| I/O Pins | 33 | 33 - same | 33 - same | 33 - same | 33 - same | 33 - same |
| Temperature Grade | Enhanced -40C to +125C | Commercial 0C to +70C | Industrial -40C to +85C | Commercial 0C to +70C | Enhanced -40C to +125C - same | Enhanced -40C to +125C - same |
| Throughput (MIPS) | 8.25 MIPS | 8.25 MIPS - same | 8.25 MIPS - same | 6.25 MIPS (-24%) | 6.25 MIPS (-24%) | 4 MIPS (-52%) |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Principais diferenciais
- Highest throughput PIC17C42A speed grade in 44-TQFP (vs PIC17C42A-25/PT)
- Wider Enhanced industrial temperature range than PIC17C42A-33/PT (vs PIC17C42A-33/PT)
- Mature documented PIC17C reference design ecosystem (vs PIC18F4220)
Notas de projeto
Place a 100 nF ceramic decoupling capacitor within 5 mm of each VDD1/VDD2/AVDD pin, paired with a bulk 10 uF tantalum or aluminum polymer capacitor on the main 5V rail. The PIC17C42A has separate digital and analog supply pins (VDD/AVDD); route AVDD through a ferrite bead from VDD to suppress digital switching noise coupling into the analog reference. The 5V typical supply (4.0-6.0 V range) is sensitive to regulator ripple - use an LDO with <50 mVpp ripple for ADC accuracy. Estimated: total decoupling budget at 33 MHz is approximately 4 x 100 nF + 1 x 10 uF per device.
The 44-pin TQFP (PT, 10x10 mm) package has a 0.8 mm pitch and 0.45 mm lead width - use ENIG or OSP surface finish with NSMD pads for reliable reflow soldering. Route the external clock traces (OSC1/OSC2) as short as possible and guard them with a ground pour to minimize EMI pickup. Keep the MCLR trace short and pull it up through a 10 kohm resistor to VDD; add a 100 nF capacitor to ground for noise filtering. The 33 I/O pins should be routed to break out via edge pads for flying-wire access during firmware bring-up.
OTP memory cannot be erased or rewritten in-circuit - any firmware bug requires physical replacement of the PIC17C42A-33E/PT. For prototype development, choose the windowed EPROM PIC17C42 in a ceramic CERDIP package instead. Also note that the Enhanced industrial "E" grade supports -40C to +125C, but the Industrial "I" grade stops at +85C - mixing them in a thermal-critical design is a common pitfall. Finally, since the PIC17C42A is now obsolete, validate date codes on incoming parts to avoid extended-storage solderability issues.
Informações de conformidade
RoHS and lead-free status not explicitly stated in verified web data for this 1996-era PIC17C part - mark as unknown. Not AEC-Q100 qualified (industrial grade only). Conflict-minerals compliance assumed per Microchip standard policy.