PIC17C42A-16/L - 8-Bit 16MHz 4KB OTP MCU 44-PLCC | Microchip
MPN: PIC17C42A-16/L ✗ Akhir HidupPIC17C42A-16/L Ringkasan
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, RAM, peripherals, and I/O on one silicon die. PIC microcontrollers from Microchip use a RISC-based Harvard architecture where separate program and data buses allow simultaneous instruction fetch and operand access. The PIC17C family sits above the PIC16C line in performance, offering higher MIPS, larger address spaces, and richer peripherals, while remaining code-compatible with the PIC16C5X, PIC12CXXX, and PIC16CXX instruction-set families.
Key features of the PIC17C42A include 8.25 MIPS throughput (121 ns instruction cycle), 232 bytes of general-purpose RAM, 33 digital I/O lines, a hardware USART for serial communication, two 8-bit timers plus two 16-bit timers, and a programmable prescaler. The 16 MHz maximum oscillator yields 8.25 MIPS - among the fastest 8-bit PIC devices in production at its introduction. The OTP program memory supports in-circuit programming via Microchip's standard tools, while the EPROM-based die allows prototype reprogramming through a windowed package variant.
Architecturally, the PIC17C42A uses a 16-bit-wide instruction word and an 8-bit data path, with a 64 KB linear program address space and 16-level hardware stack. The USART can operate in asynchronous, synchronous master, and synchronous slave modes, supporting standard baud rates up to 625 kbaud at 16 MHz. Brown-out reset, watchdog timer, and power-on reset are integrated.
Typical applications include industrial control, instrumentation, motor control front-ends, sensor signal conditioning, embedded communication bridges, and legacy 8-bit upgrades where PIC16C code must scale up without re-architecting. The wide temperature grade (-40C to +85C commercial) also supports white goods and consumer electronics.
When designing with this part, verify that your C compiler or assembler targets the PIC17C instruction set; not all PIC tools support PIC17. The 44-PLCC package is through-hole or socket-mountable, simplifying prototypes and field replacement.
This page aggregates current distributor pricing, drop-in package-compatible variants, and practical design notes synthesized from Microchip's PIC17C4X datasheet family and the PIC17C42A Errata (DS30412C) - information not consolidated on any single distributor page.
Alternatif penggantian untuk PIC17C42A-16/L — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian PIC17C42A-16/L (sama faktor bentuk dan footprint) — berbeda di dalam Program Memory Size, Program Memory Type, Operating Temperature Range, Core, Package.
PIC17C43-16I/L
✅ Drop-InKontak untuk harga
Lihat Datasheet →PIC17C42A-16I/L
✅ Drop-InKontak untuk harga
Lihat Datasheet →PIC17C44-16I/L
✅ Drop-InKontak untuk harga
Lihat Datasheet →PIC17CR42A-16I/L
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
PIC17C42A-16/PQ
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
PIC18F4220-I/L
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
PIC17C42A-16/L Rating Maksimal & Karakteristik Listrik
| Manufacturer | Microchip Technology |
| Series | PIC 17C |
| Core Processor | PIC |
| Core Size | 8-Bit |
| Maximum Clock Speed | 16 MHz |
| Instruction Throughput | 8.25 MIPS (121 ns/instruction) |
| Program Memory Type | OTP (One-Time-Programmable) EPROM |
| Program Memory Size | 4 KB (2K x 16 words) |
| RAM Size | 232 x 8 bytes |
| Number of I/O Pins | 33 |
| Communication Peripherals | 1 x USART (UART) |
| Timers | 2 x 8-bit, 2 x 16-bit |
| Rentang Suhu Kerja | 0C to +70C (commercial, /L suffix) |
| Oscillator Type | External |
| Paket / Case | 44-LCC (J-Lead), 16.59 x 16.59 mm |
| Tipe Mounting | Surface Mount (PLCC socket-compatible) |
| Lebar Bus Data | 8-bit |
| Program Memory Width | 16-bit instruction |
| Instruction Set | 58 single-word instructions (PIC17C family) |
| Programming Method | In-circuit serial programming (ICSP) + OTP |
Konfigurasi Pin PIC17C42A-16/L
| Pin produk 1 | VSS — Ground reference |
| Pin produk 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Pin produk 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Pin produk 4 | RA2/AN2 — PORTA bit 2 / analog input 2 |
| Pin produk 5 | RA3/AN3 — PORTA bit 3 / analog input 3 |
| Pin produk 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin produk 7 | RA5 — PORTA bit 5 |
| Pin produk 8 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| Pin produk 9 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| Pin produk 10 | RB2/INT2 — PORTB bit 2 / external interrupt 2 |
| Pin produk 11 | RB3 — PORTB bit 3 |
| Pin produk 12 | RB4 — PORTB bit 4 |
| Pin produk 13 | RB5 — PORTB bit 5 |
| Pin produk 14 | RB6 — PORTB bit 6 |
| Pin produk 15 | RB7 — PORTB bit 7 |
| Pin produk 16 | RC0 — PORTC bit 0 |
| Pin produk 17 | RC1 — PORTC bit 1 |
| Pin produk 18 | RC2 — PORTC bit 2 |
| Pin produk 19 | RC3 — PORTC bit 3 |
| Pin produk 20 | RC4 — PORTC bit 4 |
| Pin produk 21 | RC5 — PORTC bit 5 |
| Pin produk 22 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| Pin produk 23 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| Pin produk 24 | RD0 — PORTD bit 0 |
| Pin produk 25 | RD1 — PORTD bit 1 |
| Pin produk 26 | RD2 — PORTD bit 2 |
| Pin produk 27 | RD3 — PORTD bit 3 |
| Pin produk 28 | RD4 — PORTD bit 4 |
| Pin produk 29 | RD5 — PORTD bit 5 |
| Pin produk 30 | RD6 — PORTD bit 6 |
| Pin produk 31 | RD7 — PORTD bit 7 |
| Pin produk 32 | RE0/RD — PORTE bit 0 / parallel slave port read |
| Pin produk 33 | RE1/WR — PORTE bit 1 / parallel slave port write |
| Pin produk 34 | OSC1/CLKIN — Oscillator crystal input / external clock in |
| Pin produk 35 | OSC2/CLKOUT — Oscillator crystal output / clock out |
| Pin produk 36 | MCLR/VPP — Master clear reset / programming voltage |
| Pin produk 37 | VSS — Ground reference |
| Pin produk 38 | VDD — Positive supply voltage |
| Pin produk 39 | NC — Not connected (per datasheet) |
| Pin produk 40 | NC — Not connected (per datasheet) |
| Pin produk 41 | NC — Not connected (per datasheet) |
| Pin produk 42 | NC — Not connected (per datasheet) |
| Pin produk 43 | NC — Not connected (per datasheet) |
| Pin produk 44 | NC — Not connected (per datasheet) |
Aplikasi Umum
PIC17C42A-16/L cocok untuk 6 aplikasis: Industrial Control Systems, Embedded Instrumentation, Motor Control Front-End, Legacy Communication Bridges, Consumer Appliance Control, Sensor Signal Conditioning Hubs.
Industrial Control Systems
The PIC17C42A-16/L's 16 MHz clock delivering 8.25 MIPS and 33 I/O pins makes it well-suited for industrial control logic where deterministic loop times matter. With 4 KB of OTP program memory and 232 B of RAM, the part fits typical PLC sub-modules, sensor hubs, and discrete I/O expanders running scan loops under 5 ms. The 44-PLCC package is socket-compatible for easy field replacement, and the integrated USART handles RS-232/RS-485 bridge duties when paired with a transceiver. Designers should budget OTP write cycles during development; for production volumes migrate to PIC18F4220 with flash.
Direkomendasikan
Embedded Instrumentation
For digital panel meters, data loggers, and bench instruments, the PIC17C42A-16/L's 8.25 MIPS instruction rate and hardware USART let one chip handle keypad scanning, LCD drive, and serial upload simultaneously. The 16-bit instruction word keeps code compact in OTP, fitting typical instrument firmware under 4 KB. The 33 I/O pins easily serve a 4x4 keypad plus 8-digit LCD multiplex plus a UART. Brown-out reset and watchdog timer protect against brown-outs in wall-powered test gear. Pair with a low-dropout regulator (e.g. MCP1700) and a precision ADC for measurement front-ends.
Direkomendasikan
Motor Control Front-End
At 8.25 MIPS the PIC17C42A-16/L can generate PWM at carrier frequencies above 20 kHz for small brushed DC or stepper motor front-ends, well above the audible band. The two 16-bit timers capture quadrature encoder inputs for closed-loop velocity control, while the two 8-bit timers drive PWM channels. With 33 I/O, the MCU can directly interface H-bridge drivers and current-sense amplifiers without external logic. The 44-PLCC package and -40C to +70C commercial range suit appliance-grade motor control where OTP memory locks the production firmware against field tampering.
Direkomendasikan
Legacy Communication Bridges
Bridging RS-232 to RS-485, or UART to SPI peripherals, is a classic use of the PIC17C42A-16/L's hardware USART and 33 I/O. At 16 MHz the USART can sustain 625 kbaud cleanly, enough for industrial fieldbus gateway duty. The 4 KB OTP holds typical translation firmware (command parser, address filter, echo buffer) comfortably. Designers appreciate the 44-PLCC socket compatibility for service-friendly field deployments. For new designs migrating to active parts, PIC18F4220 with multiple EUSARTs simplifies multi-protocol gateway code.
Direkomendasikan
Consumer Appliance Control
White-goods and consumer appliances commonly used PIC17C42A-16/L for washers, dishwashers, and HVAC controls where deterministic 16 MHz timing manages relays, sensors, and user interfaces. The commercial 0C to +70C range covers indoor appliances; for outdoor use, the PIC17C42A-16I/L industrial variant is the drop-in. OTP memory locks production firmware, preventing aftermarket tampering with safety-critical code. 232 B of RAM comfortably buffers keypad debouncing, display refresh, and a state machine for cycle control.
Direkomendasikan
Sensor Signal Conditioning Hubs
The PIC17C42A-16/L's 33 I/O pins and 16 MHz throughput make it a practical hub for aggregating multiple low-speed sensors (temperature, humidity, contact closures) into one UART stream. With 4 KB of OTP, designers can implement calibration tables, linearization, and Modbus RTU framing without external memory. The USART plus timer-driven bit-banging gives flexibility for 1-Wire, I2C (via software), or SPI sensor polling. Industrial users appreciate the wide MCU ecosystem and 44-PLCC socket-friendly form factor for service contracts.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk PIC17C42A-16/L — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | PIC17C43-16I/L | PIC17C42A-16I/L | PIC17C44-16I/L | PIC17CR42A-16I/L | PIC18F4220-I/L |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-PLCC (J-Lead) | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same |
| Program Memory | 4 KB OTP | 8 KB OTP | 4 KB OTP | 16 KB OTP | 4 KB ROM (factory-masked) | 4 KB Flash |
| RAM Size | 232 bytes | 454 bytes | 232 bytes | 454 bytes | 232 bytes | 512 bytes |
| Maximum Clock | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 40 MHz |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 36 |
| Memory Type | OTP | OTP | OTP | OTP | ROM (masked) | Flash (rewritable) |
| Operating Temperature | 0C to +70C (commercial) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND | Active |
Diferensiator Kunci
- 8.25 MIPS throughput at 16 MHz - the fastest 8-bit PIC in its generation (vsPIC16F877A)
- 64 KB linear program address space versus PIC16's 8 KB paged memory (vsPIC16F877A)
- True drop-in same-package alternative available from Microchip within the family (vsPIC17C43-16I/L)
Catatan Desain
PIC17C42A-16/L operates from a single 5V supply. Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of the VDD/VSS pins (pins 38/37), plus a bulk 10 uF tantalum or aluminum electrolytic on the same rail. The PIC17C4X family has switching transients inside the core; insufficient decoupling will manifest as erratic code execution or intermittent brown-out resets. Connect MCLR/VPP (pin 36) to VDD through a 10 kohm resistor and add a 100 nF cap to ground if the reset line is long or noisy. [DATA_NEEDED: exact Vdd min/max for the -16 speed grade - verify against DS30412D]
The 44-PLCC (J-Lead) package has standard 1.27 mm pitch with J-leads wrapping under the package body. For prototypes, use a PLCC socket (e.g. 3M 8444-11B1) so chips can be swapped without rework; this is especially important given the OTP nature of PIC17C42A - any firmware bug requires a new part. Place the oscillator crystal (or resonator) within 10 mm of OSC1/OSC2 (pins 34/35) and route the traces symmetrically to minimize stray capacitance. If using an external clock source, drive only OSC1 and leave OSC2 unconnected per datasheet.
PIC17C42A is an OTP (One-Time-Programmable) part - once programmed, the firmware cannot be changed. Do NOT use OTP parts for development prototypes; instead use a PIC17C42A-16/JW windowed EPROM variant (Microchip /JW suffix) for iteration, then transfer the validated firmware to the /L OTP part for production. Also note: not all PIC compilers and programmers support PIC17C - verify your toolchain (MPLAB XC8 supports PIC17C; some third-party tools do not). The part is in NRND status; new designs should migrate to PIC18F4220 to avoid supply uncertainty.
Route the USART lines (RC6/TX and RC7/RX, pins 22/23) as short, impedance-controlled traces if running above 100 kbaud. For RS-232 connections, place the transceiver (e.g. MAX232) adjacent to the MCU and keep the high-voltage driver outputs away from analog traces. The PORTD pins (24-31) form an 8-bit parallel port useful for external memory or PSP; if unused, leave them as outputs driven low to minimize current. Place a guard ring or ground fill around analog-capable pins RA0-RA5 (pins 2-7) when used for ADC-style sensing to reduce digital crosstalk.
Informasi Konformitas
Detailed compliance status not present in the Verified Web Data snippets. PIC17C4X family pre-dates many modern compliance statements; consult Microchip product page (https://www.microchip.com/en-us/product/PIC17C42A) for the latest RoHS/REACH certificates. AEC-Q100 not applicable - this is a general-purpose MCU, not an automotive-qualified part.
