PIC17C42A-16I/P - 8-Bit 16MHz OTP MCU, 40-PDIP | Microchip
MPN: PIC17C42A-16I/P ⚠ Bahagian terakhir untuk beliPIC17C42A-16I/P Ringkasan
Background: An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, RAM, peripherals, and I/O. PIC17C series microcontrollers use a RISC-based Harvard architecture with 58 single-word instructions, most executing in a single instruction cycle (121 ns at 16 MHz oscillator input). The 17C family sits above the baseline PIC16 in Microchip's portfolio, adding hardware multipliers, additional timers, USART, PWM, and capture modules for real-time control applications.
Key features of the PIC17C42A-16I/P include 8.25 MIPS throughput, an external oscillator interface, three hardware timers, two capture inputs, two PWM outputs, a hardware USART, an 8x8 hardware multiplier, and a 16-level hardware stack. The OTP (One-Time-Programmable) memory enables pre-programmed code for prototyping and low-to-medium volume production runs. The 'I' suffix denotes industrial temperature grade (-40C to +85C).
Architecturally, the PIC17C42A uses a 16-bit-wide instruction word with an 8-bit data path, providing 2K instruction words and 232 bytes of register-mapped RAM. Compared to PIC16C devices, the 17C core widens the program bus, adds indexed addressing with two address pointers, and integrates a hardware multiply unit.
Typical applications include industrial control loops, motor drives, smart sensors, automotive subsystems, security panels, and embedded data-acquisition front-ends that need deterministic timing and a small footprint.
Design consideration: When replacing or sourcing this part, note that Microchip has marked the PIC17C42A as legacy. For new designs, Microchip recommends the PIC18F family as a modern flash-based migration path. Designers should verify oscillator input drive strength and use a 100 nF decoupling capacitor on VDD placed within 5 mm of the package pins.
This page synthesizes distributor pricing, drop-in PDIP alternatives within the PIC17C family, and practical design notes not found in the manufacturer datasheet alone.
Pilihan pengganti yang segera untuk PIC17C42A-16I/P — sama paket, pin-pin kompatibel. Bahagian paket yang berbeza memerlukan kerja ulang PCB diasingkan.
Varietas dalam siri ini
Model serupa yang kompatibel dengan pengganti yang segera PIC17C42A-16I/P (sama faktor bentuk dan kaki) — berbeza dalam Operating Temperature, Package, Mounting Type, Program Memory Type, Hardware Multiplier.
PIC17C42A-16/P
✅ Masuk Drop-InHubungi untuk harga
Lihat Datasheet →PIC17C42A-16E/P
✅ Masuk Drop-InHubungi untuk harga
Lihat Datasheet →PIC17C43-16I/P
✅ Masuk Drop-In📋 Alternatif rujukan (tidak dalam katalog)
PIC17C42A-16I/L
✅ Masuk Drop-InHubungi untuk harga
Lihat Datasheet →PIC17C42A-16I/PQ
✅ Masuk Drop-InHubungi untuk harga
Lihat Datasheet →PIC17C42A-16I/P Penilaian maksimum & Ciri-ciri Elektrik
| Core Architecture | 8-bit PIC17C RISC |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 4 KB (2K x 16) |
| RAM Size | 232 x 8 bytes |
| Maximum CPU Frequency | 16 MHz |
| Instruction Cycle Time | 121 ns (single cycle) |
| Throughput | 8.25 MIPS |
| Number of I/O Pins | 33 |
| Number of Instructions | 58 single-word |
| Hardware Multiplier | 8 x 8 (single-cycle) |
| Timers | 3 |
| Capture Inputs | 2 |
| PWM Outputs | 2 |
| Communication | USART (1x) |
| Oscillator Type | External |
| Suhu Operasi | -40C to +85C (industrial grade) |
| Kemasan | 40-PDIP (through-hole) |
| Jenis Pemasangan | Through-Hole |
Konfigurasi Pin PIC17C42A-16I/P
| Pin 1 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Pin 2 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Pin 3 | RA2/AN2 — PORTA bit 2 / analog input 2 |
| Pin 4 | RA3/AN3 — PORTA bit 3 / analog input 3 |
| Pin 5 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 6 | RA5/SS — PORTA bit 5 / SPI slave select |
| Pin 7 | RA6/CLKOUT — PORTA bit 6 / clock output |
| Pin 8 | RA7 — PORTA bit 7 |
| Pin 9 | OSC1 — External oscillator input |
| Pin 10 | OSC2 — Oscillator output / crystal connection |
| Pin 11 | MCLR — Master clear reset (active low) |
| Pin 12 | VSS — Ground reference |
| Pin 13 | VDD — Positive supply voltage |
| Pin 14 | RB0/INT — PORTB bit 0 / external interrupt |
| Pin 15 | RB1 — PORTB bit 1 |
| Pin 16 | RB2 — PORTB bit 2 |
| Pin 17 | RB3 — PORTB bit 3 |
| Pin 18 | RB4 — PORTB bit 4 |
| Pin 19 | RB5 — PORTB bit 5 |
| Pin 20 | RB6 — PORTB bit 6 |
| Pin 21 | RB7 — PORTB bit 7 |
| Pin 22 | RC0 — PORTC bit 0 |
| Pin 23 | RC1 — PORTC bit 1 |
| Pin 24 | RC2 — PORTC bit 2 |
| Pin 25 | RC3 — PORTC bit 3 |
| Pin 26 | RC4 — PORTC bit 4 |
| Pin 27 | RC5 — PORTC bit 5 |
| Pin 28 | RC6 — PORTC bit 6 |
| Pin 29 | RC7 — PORTC bit 7 |
| Pin 30 | VSS — Ground reference |
| Pin 31 | VDD — Positive supply voltage |
| Pin 32 | RD0 — PORTD bit 0 |
| Pin 33 | RD1 — PORTD bit 1 |
| Pin 34 | RD2 — PORTD bit 2 |
| Pin 35 | RD3 — PORTD bit 3 |
| Pin 36 | RD4 — PORTD bit 4 |
| Pin 37 | RD5 — PORTD bit 5 |
| Pin 38 | RD6 — PORTD bit 6 |
| Pin 39 | RD7 — PORTD bit 7 |
| Pin 40 | RE0 — PORTE bit 0 |
Aplikasi Biasa
PIC17C42A-16I/P patut untuk 6 aplikasis: Industrial Motor Control, Smart Sensor / Data Acquisition Front-End, Security and Alarm Panels, Automotive Body and Accessory Modules, Embedded Real-Time Control Loops, Legacy Embedded System Maintenance and Repair.
Industrial Motor Control
The PIC17C42A-16I/P fits industrial motor control because its 8.25 MIPS throughput delivers deterministic 121 ns single-cycle instruction execution, two PWM outputs drive H-bridge or three-phase gate signals, and two capture inputs read quadrature encoder feedback at high update rates. The hardware 8x8 multiplier closes PI and field-oriented control loops without CPU stalls, and the USART provides a robust isolated RS-485/Modbus link to a host controller. Placed on a 40-PDIP through-hole PCB, the industrial -40C to +85C temperature grade survives cabinet environments, while 33 I/O pins accept limit-switch, thermistor, and brake-resistor signals directly.
Disebarkan
Smart Sensor / Data Acquisition Front-End
The PIC17C42A-16I/P is well matched to a smart-sensor data-acquisition front-end because 33 I/O pins connect to multiple analog and digital sensor channels, the USART streams digitized samples to a host, and three timers pace sampling-rate-sensitive inputs without CPU polling overhead. The 232-byte RAM is sufficient for circular sample buffers in sensor-protocol gateways, and the 4 KB OTP holds protocol stacks for sensor-bus standards. Drawing typically under 25 mA active, the part fits remote or solar-powered installations where the industrial temperature rating ensures operation from cold storage to hot industrial cabinets.
Disebarkan
Security and Alarm Panels
The PIC17C42A-16I/P suits security and alarm panels because 33 I/O lines interface directly to PIR sensors, magnetic reed switches, keypad matrices, sirens, and relay outputs without external mux logic, and the OTP memory protects proprietary zone-decision firmware from reverse engineering. Two PWM outputs can drive piezo sirens with programmable tone patterns, while two capture inputs time-stamp door-chime events for the event log. The USART talks to a digital dialer or central-station modem, and the -40C to +85C industrial grade covers unheated garages and outdoor enclosures.
Disebarkan
Automotive Body and Accessory Modules
The PIC17C42A-16I/P powers automotive body-electronic modules because its hardware USART interfaces with LIN bus transceivers, two PWM outputs dim instrument-panel backlights and drive small DC loads, and 33 I/O pins handle window, mirror, seat, and wiper switches. The 8.25 MIPS throughput runs switch-debounce, multiplexed indicator logic, and basic diagnostics within tight scheduling windows. Designers should note that the part is not AEC-Q100 qualified; for under-hood or ABS modules, choose AEC-Q100-qualified PIC18 alternatives, but for cabin-mounted accessories the PIC17C42A-16I/P is adequate.
Disebarkan
Embedded Real-Time Control Loops
The PIC17C42A-16I/P is ideal for embedded real-time control loops because every instruction except branches executes in a single 121 ns cycle at 16 MHz, and three hardware timers (Timer0, Timer1, Timer2) generate deterministic interrupts for fixed-rate control periods. The 8x8 hardware multiplier accelerates PI and PID math, while two PWM outputs drive actuators and two capture inputs read rotary-encoder feedback. With 232 bytes of RAM and 33 I/O pins, the MCU fits mid-sized loop controllers such as HVAC damper actuators, pump speed controllers, and small VFD reference boards without external logic.
Disebarkan
Legacy Embedded System Maintenance and Repair
The PIC17C42A-16I/P remains in demand for legacy embedded system maintenance because Microchip factory stock is depleted and many installed industrial controllers, security panels, and laboratory instruments depend on this exact die revision. Service engineers can order direct drop-in replacements on the same 40-PDIP footprint, restoring production lines and lab equipment without board redesign. The OTP memory matches the original firmware image exactly, while the industrial -40C to +85C rating keeps replacement units aligned with the original bill of materials.
Disebarkan
Ringkasan Produk Disebarkan
Data referensi kejuruteraan untuk PIC17C42A-16I/P — perbandingan, panduan rancangan, dan maklumat kesediaan
Panduan Pilihan
Perbandingan dengan Gantian
| Parametr | Produk Ini | PIC17C42A-16/P | PIC17C42A-16E/P | PIC17C43-16I/P | PIC17C42A-16I/L | PIC17C42A-16I/PQ |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 40-PDIP (through-hole) | 40-PDIP - same | 40-PDIP - same | 40-PDIP - same | 40-pin CERDIP (L) - same pin count, different body | 44-PQFP (Q) - NOT same footprint |
| Program Memory | 4 KB (2K x 16) OTP | 4 KB OTP | 4 KB OTP | 8 KB (4K x 16) OTP | 4 KB EPROM (UV-eraseable) | 4 KB OTP |
| Maximum Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz |
| RAM Size | 232 bytes | 232 bytes | 232 bytes | 454 bytes | 232 bytes | 232 bytes |
| Temperature Grade | Industrial (-40C to +85C) | Commercial (0C to +70C) | Extended grade variant | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) |
| Memory Type | OTP (one-time programmable) | OTP | OTP | OTP | Windowed EPROM (UV-eraseable for prototype use) | OTP |
| Pin Count | 40 | 40 | 40 | 40 | 40 | 44 (PQFP, not pin-compatible) |
| Lifecycle Status | Last-time-buy (legacy) | Last-time-buy | Last-time-buy | Last-time-buy | Last-time-buy | Last-time-buy |
Penyeberangsung Jelas
- Pin-compatible 8 KB code upgrade on the same 40-PDIP footprint (vsPIC17C42A-16/P)
- UV-eraseable windowed package for prototype development (vsPIC17C42A-16I/P (OTP))
- Microchip-recommended flash migration for new designs (vsPIC18F4220)
Catatan Desain
Place a 100 nF decoupling capacitor within 5 mm of each VDD/VDDx pin pair on the PIC17C42A-16I/P, and add a bulk 10 uF tantalum or low-ESR aluminum electrolytic capacitor on the board-side supply. The device draws approximately 25 mA active at 16 MHz; ensure the upstream regulator provides at least 50 mA headroom and tolerates 50 mV or less of supply droop during PWM transitions.
The PIC17C42A-16I/P is OTP (one-time programmable) and cannot be reprogrammed. Confirm your firmware is fully debugged on a windowed PIC17C42A-16I/L before committing production units, or stock a re-spin allowance for any engineering change. Also note that migrating from PIC16C to PIC17C requires attention to interrupt vector count and configuration word layout - they are NOT the same family.
For the 40-pin PDIP layout, keep analog inputs (RA0-RA5) physically separated from PWM outputs and oscillator traces to minimize digital coupling into ADC readings. Route the external oscillator traces short, symmetric, and guarded by a ground pour to suppress EMI; long oscillator traces can inject phase noise into PWM edge timing. Note that the migration path PIC18F4220 is NOT pin-compatible, so allocate board space for a potential redesign.
Maklumat Kesediaan
RoHS, REACH, lead-free, halogen-free, and conflict-minerals status are not stated in the verified web data and must be confirmed against the supplier's certificate of compliance for the specific lot. The part is not AEC-Q100 qualified; do not use for automotive safety-critical applications.
