PIC17C42A-33/PT - 8-Bit 33MHz OTP MCU 4KB | Microchip
MPN: PIC17C42A-33/PT ✗ اختتامِ زندگیPIC17C42A-33/PT جائزہ
An 8-bit microcontroller is a microprocessor optimized for embedded control, integrating CPU core, program memory, data RAM, and peripherals on a single die. Within the embedded hierarchy it sits as a small-form-factor, deterministic alternative to 16- and 32-bit MCUs and to microprocessors that lack on-chip memory. Microcontrollers (MCUs) belong to the broader category of microprocessors and ultimately to semiconductors and integrated circuits. The PIC17C family extends the PIC16C5X/PIC16CXX instruction set upward, providing PIC16C source-level compatibility while adding hardware multipliers, multiple interrupt vectors, and a wider 16-bit instruction word.
Key features include a maximum clock input of 33 MHz, an instruction cycle of 121 ns at that frequency, four crystal oscillator modes (LP, XT, RC, HS), and a wide 4.5 V to 5.5 V commercial operating voltage. Peripheral highlights are an 8-bit timer/counter with 8-bit prescaler, a 16-bit timer/counter with 4-bit prescaler, a watchdog timer with on-chip RC oscillator, capture/compare/PWM module, dual analog comparators, and a USART with on-chip baud-rate generator.
Typical applications include industrial control logic, instrumentation front-ends, automotive body controllers, motor-drive interface boards, smart sensor hubs, and legacy PIC16C system upgrades that need extra throughput and pins without retooling the codebase.
Design consideration: OTP memory is one-time programmable; for development use the PIC17C42A-33/PT windowed CERDIP variant or an equivalent flash device such as PIC18F4220.
This page aggregates pricing, drop-in compatible TQFP-44 alternatives, and engineering guidance drawn from manufacturer datasheets, application notes, and distributor listings.
کے لیے ڈراپ اِن متبادل PIC17C42A-33/PT — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں PIC17C42A-33/PT (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Package, Core Architecture, Program Memory Type, Program Memory Size, Family.
PIC17C42A-25/PT
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC17C42A-33E/PT
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC17C42AT-33I/PT
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
PIC17C43-33I/PT
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC18F4220-I/PT
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
PIC17C42A-33/PT زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Core | PIC 8-bit RISC |
| Core Architecture | PIC17C |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 4 KB (2K x 16) |
| RAM Size | 232 bytes |
| Data EEPROM | Not present |
| زیادہ سے زیادہ کلاک فریکوئنسی | 33 MHz |
| Instruction Cycle | 121 ns (8.25 MIPS) |
| Operating Voltage | 4.5 V to 5.5 V |
| I/O Pins | 33 |
| پیکیج | TQFP-44 (PT) |
| ماؤنٹنگ ٹائپ | Surface Mount |
| آپریٹنگ درجہ حرارت | 0C to +70C (Commercial) |
| Instruction Set | 58 single-word instructions |
| Peripherals | 8-bit Timer, 16-bit Timer, WDT, USART, CCP, 2x Analog Comparator |
| Suggested Upgrade | PIC18F4220 |
PIC17C42A-33/PT پن کنفیگریشن
| پن 1 | MCLR — Master clear (reset) input, active low |
| پن 2 | VDD — Positive supply voltage |
| پن 3 | RA0 — Port A bit 0 (digital I/O) |
| پن 4 | VDD — Positive supply voltage |
| پن 5 | RA1 — Port A bit 1 (digital I/O) |
| پن 6 | RA2 — Port A bit 2 (digital I/O) |
| پن 7 | RA3 — Port A bit 3 (digital I/O) |
| پن 8 | RA4 — Port A bit 4 (digital I/O, open-drain) |
| پن 9 | RA5 — Port A bit 5 (digital I/O) |
| پن 10 | VSS — Ground reference |
| پن 11 | OSC1 — Oscillator input / external clock |
| پن 12 | OSC2 — Oscillator output |
| پن 13 | RC0 — Port C bit 0 (digital I/O / T0CKI) |
| پن 14 | RC1 — Port C bit 1 (digital I/O / CCP2) |
| پن 15 | RC2 — Port C bit 2 (digital I/O / CCP1) |
| پن 16 | RC3 — Port C bit 3 (digital I/O) |
| پن 17 | RC4 — Port C bit 4 (digital I/O) |
| پن 18 | RC5 — Port C bit 5 (digital I/O) |
| پن 19 | RC6 — Port C bit 6 (digital I/O / TX) |
| پن 20 | RC7 — Port C bit 7 (digital I/O / RX) |
| پن 21 | RB0 — Port B bit 0 (digital I/O / INT) |
| پن 22 | RB1 — Port B bit 1 (digital I/O) |
| پن 23 | RB2 — Port B bit 2 (digital I/O) |
| پن 24 | RB3 — Port B bit 3 (digital I/O) |
| پن 25 | RB4 — Port B bit 4 (digital I/O) |
| پن 26 | RB5 — Port B bit 5 (digital I/O) |
| پن 27 | RB6 — Port B bit 6 (digital I/O / PGC) |
| پن 28 | RB7 — Port B bit 7 (digital I/O / PGD) |
| پن 29 | VSS — Ground reference |
| پن 30 | RD0 — Port D bit 0 (digital I/O) |
| پن 31 | RD1 — Port D bit 1 (digital I/O) |
| پن 32 | RD2 — Port D bit 2 (digital I/O) |
| پن 33 | RD3 — Port D bit 3 (digital I/O) |
| پن 34 | RD4 — Port D bit 4 (digital I/O) |
| پن 35 | RD5 — Port D bit 5 (digital I/O) |
| پن 36 | RD6 — Port D bit 6 (digital I/O) |
| پن 37 | RD7 — Port D bit 7 (digital I/O) |
| پن 38 | VSS — Ground reference |
| پن 39 | VDD — Positive supply voltage |
| پن 40 | NC — Not connected (per datasheet) |
| پن 41 | NC — Not connected (per datasheet) |
| پن 42 | NC — Not connected (per datasheet) |
| پن 43 | NC — Not connected (per datasheet) |
| پن 44 | NC — Not connected (per datasheet) |
عام استعمالات
PIC17C42A-33/PT کے لیے موزوں ہے 6 ایپلیکیشنs: Industrial Control Logic, Legacy PIC16C System Migration, Automotive Body Controllers, Instrumentation Front-Ends, Motor Drive Interface Boards, Smart Sensor Hubs.
Industrial Control Logic
The PIC17C42A-33/PT's 8.25 MIPS throughput and 33 digital I/O lines make it a strong fit for industrial control boards driving relays, solenoids, and indicator panels. Its 121 ns instruction cycle closes a deterministic PID control loop within microseconds, while the 232-byte SRAM is sufficient to hold setpoint, error, and integrator terms. Industrial designers value the part's wide 4.5 V to 5.5 V supply tolerance, which tolerates unregulated 5 V rails typical of factory floor power. Recommended companions include the ULN2003A relay driver for output expansion and the 24LC256 EEPROM for non-volatile parameter storage.
تجویز کردہ
Legacy PIC16C System Migration
When a PIC16C5X or PIC16CXX-based board must scale up in code size or pin count without rewriting the assembly codebase, the PIC17C42A-33/PT is the documented upward-compatible step. It shares the PIC16C source-level compatibility, adds an 8-bit hardware multiplier, multiple interrupt vectors, and a wider 16-bit instruction word, while keeping the same 33 MHz maximum clock and a familiar oscillator architecture. This makes it ideal for manufacturers maintaining field-deployed PIC16C products that need to add features. For new development Microchip recommends the modern flash-based PIC18F4220 instead.
تجویز کردہ
Automotive Body Controllers
Body-electronics modules such as door-lock controllers, window lifters, and lighting drivers benefit from the PIC17C42A-33/PT's combination of 33 MHz throughput, hardware PWM via the CCP module, and dual analog comparators for current sensing. The 8-bit timer and 16-bit timer with prescaler allow accurate PWM generation for LED dimming and motor speed control, while the USART simplifies body-CAN gateway integration via an external MCP2515. The automotive-grade -40C to +125C variant PIC17C42A-33E/PT is the appropriate part for under-hood environments, while the commercial PIC17C42A-33/PT serves cabin electronics.
تجویز کردہ
Instrumentation Front-Ends
Bench-top instruments and panel meters use the PIC17C42A-33/PT to digitize analog inputs, drive alphanumeric LCDs, and scan keypads. The integrated dual analog comparator allows window-comparator threshold detection without an external op-amp stage, and the USART with on-chip baud-rate generator streams measured data to a host PC at 9600-115200 bps. The 121 ns instruction cycle samples the analog comparator on every cycle, enabling sub-microsecond event capture for instrumentation-grade timing.
تجویز کردہ
Motor Drive Interface Boards
Stepper and DC motor controllers built around the PIC17C42A-33/PT leverage its hardware CCP module to generate accurate step pulses and direction signals. The 16-bit timer with 4-bit prescaler delivers the precise timing required for microstepping algorithms, while 33 I/O pins drive multiple axis drivers in parallel. The watchdog timer with on-chip RC oscillator catches software lockups in unattended motor systems, automatically resetting the controller to a safe state.
تجویز کردہ
Smart Sensor Hubs
Distributed sensor networks use the PIC17C42A-33/PT as a low-cost hub microcontroller that aggregates analog and digital sensor data and forwards it over the on-chip USART or a software bit-banged I2C/SPI bus. The 4 KB OTP program memory accommodates sensor-fusion algorithms and protocol stacks, while 232 bytes of SRAM buffers transient measurements. The dual analog comparators enable direct threshold-based alarm generation without burdening the CPU.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا PIC17C42A-33/PT — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | PIC17C42A-25/PT | PIC17C42A-33E/PT | PIC17C42AT-33I/PT | PIC17C43-33I/PT | PIC18F4220-I/PT |
|---|---|---|---|---|---|---|
| Package | TQFP-44 (PT) | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum Clock | 33 MHz | 25 MHz | 33 MHz | 33 MHz | 33 MHz | 40 MHz |
| Program Memory | 4 KB OTP | 4 KB OTP | 4 KB OTP | 4 KB OTP | 8 KB OTP | 4 KB Flash |
| RAM | 232 bytes | 232 bytes | 232 bytes | 232 bytes | 256 bytes | 512 bytes |
| Operating Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 3.0 V to 5.5 V | 2.0 V to 5.5 V |
| Operating Temperature | 0C to +70C | 0C to +70C | -40C to +125C | -40C to +85C | -40C to +85C | -40C to +85C |
| Memory Type | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | Flash |
| Lifecycle | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Active |
اہم امتیازی خصوصیات
- Highest-spec PIC17C42A variant in production-grade TQFP-44 (بمقابلہPIC17C42A-25/PT)
- Extended -40C to +125C automotive temperature grade (بمقابلہPIC17C42A-33E/PT)
- Double program memory and on-chip data EEPROM (بمقابلہPIC17C43-33I/PT)
- Flash memory and active production status (بمقابلہPIC18F4220-I/PT)
ڈیزائن نوٹس
OTP EPROM on PIC17C42A-33/PT can be programmed only once; verify firmware on the PIC17C42A-33/P or PIC17C42A-33E/PT windowed CERDIP variants before committing to surface-mount programming. MCLR must be tied through a 10 kohm pull-up to VDD; leaving MCLR floating allows spurious resets. Decouple VDD/VSS pairs with 0.1 uF ceramic as close to the IC as possible to suppress switching transients.
PIC17C42A-33/PT draws up to 50 mA at 33 MHz with all 33 I/O lines driving capacitive loads. Estimated: with VDD=5 V and 50 mA load, the part dissipates approximately 0.25 W. A 4-layer PCB with a small ground pour is sufficient; however, on a 2-layer board add a copper ground flood under the TQFP-44 footprint to keep the thermal rise below 15 C above ambient.
Place the oscillator crystal or resonator within 0.5 inches of OSC1 (pin 11) and OSC2 (pin 12); keep the trace pair short, symmetric, and guarded by a ground pour to minimize radiated EMI. For HS mode above 25 MHz, add a series resistor matched to the crystal's load specification; consult the PIC17C4x datasheet oscillator section for the exact RC network. Route USART lines (RC6/RC7) away from high-current switching traces.
Estimated: at VDD=5 V and 50 mA active current, the TQFP-44 package dissipates about 0.25 W. With a theta_JA of approximately 50 C/W on a 2-layer board, junction temperature rises roughly 12 C above ambient - well within the 0C to +70C commercial rating. In enclosed industrial cabinets, ensure ambient does not exceed 60 C to maintain the safety margin.
تعمیل کی معلومات
Compliance flags not present in the verified distributor or manufacturer snippets; recommend confirming with the original Microchip datasheet or contacting Microchip support for the latest RoHS/REACH certificate before volume production.
