PIC16LC74A-04I/P - 8-bit 4MHz MCU 7KB OTP 40-PDIP | Microchip
MPN: PIC16LC74A-04I/P ✗ اختتامِ زندگیPIC16LC74A-04I/P جائزہ
What is an 8-bit microcontroller? An 8-bit microcontroller is a self-contained computing IC that integrates a CPU, memory (program + RAM), and peripherals on a single die. PIC microcontrollers use a Harvard RISC architecture with separate program/data buses, enabling deterministic instruction timing of one instruction per cycle (4 clock cycles). The PIC16C7X family to which PIC16LC74A belongs is a mid-range family, sitting between the baseline PIC10/12/16 and the enhanced PIC18 family in capability and pin count.
Key features include 33 digital I/O lines, a 5-channel 8-bit Analog-to-Digital Converter (ADC), 2 capture/compare/PWM (CCP) modules, a USART for serial communication, an SSP (Synchronous Serial Port), three timers, and 11 interrupt sources. The OTP (One-Time Programmable) program memory means it can be programmed once and is intended for volume production, distinguishing it from windowed EPROM or flash-based siblings.
The architecture pairs a 14-bit instruction word with an 8-bit data path, supporting 35 single-cycle instructions at 1 MIPS performance. The LC suffix denotes the low-voltage/low-power CMOS process, allowing operation down to 2.5V and reducing active power draw, suitable for battery-powered or power-budgeted designs.
Typical applications include industrial control systems, automotive body electronics (non-safety), appliance control, sensor signal conditioning, and embedded instrumentation. Its 40-pin PDIP form factor remains favored for legacy designs, educational platforms, and through-hole manufacturing lines.
When designing with PIC16LC74A-04I/P, ensure the OTP programming step is planned before PCB assembly. Use MPLAB IDE with a compatible programmer such as PICkit 3 or ICD for development; note that OTP parts are field-non-rewritable.
This page consolidates distributor pricing, drop-in alternatives, and practical design notes not found in the standalone datasheet, helping engineers evaluate the PIC16LC74A-04I/P against modern flash-based equivalents for both new designs and legacy maintenance.
کے لیے ڈراپ اِن متبادل PIC16LC74A-04I/P — 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 PIC16LC74A-04I/P (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Package, Timers, ADC, Mounting Type, Program Memory Size.
PIC16C74A-04I/P
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16LC74A-04I/PQ
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16LC74A-04/PQ
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16F74-I/P
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16LC74A-04I/P زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Core | 8-bit PIC (RISC, Harvard) |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 7 KB (4K x 14) |
| RAM | 192 bytes |
| EEPROM | 0 bytes |
| Maximum CPU Frequency | 4 MHz |
| Operating Voltage Range | 2.5 V to 6 V |
| I/O Pins | 33 |
| ADC | 8-bit, 5 channels |
| Timers | 3 (Timer0, Timer1, Timer2) |
| CCP Modules | 2 |
| Serial Interfaces | USART, SSP (Synchronous Serial Port) |
| Interrupt Sources | 11 |
| پیکیج | 40-pin PDIP (DIP-40) |
| ماؤنٹنگ ٹائپ | Through-Hole |
| آپریٹنگ درجہ حرارت رینج | -40C to +85C (Industrial) |
| Process Technology | CMOS, LC (low-power) variant |
PIC16LC74A-04I/P پن کنفیگریشن
| پن 1 | MCLR/VPP — Master Clear (reset) input / Programming voltage |
| پن 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| پن 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| پن 4 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| پن 5 | RA3/AN3/VREF — PORTA bit 3 / Analog input 3 / ADC reference |
| پن 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| پن 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SSP slave select |
| پن 8 | OSC1/CLKIN — Oscillator crystal input / external clock |
| پن 9 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| پن 10 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| پن 11 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| پن 12 | RC2/CCP1 — PORTC bit 2 / CCP1 |
| پن 13 | RC3/SCK/SCL — PORTC bit 3 / SSP clock / I2C clock |
| پن 14 | RC4/SDI/SDA — PORTC bit 4 / SSP data in / I2C data |
| پن 15 | RC5/SDO — PORTC bit 5 / SSP data out |
| پن 16 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| پن 17 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| پن 18 | GND — Ground |
| پن 19 | VSS — Ground (second pin) |
| پن 20 | VDD — Positive supply voltage |
| پن 21 | RB0/INT — PORTB bit 0 / External interrupt |
| پن 22 | RB1 — PORTB bit 1 |
| پن 23 | RB2 — PORTB bit 2 |
| پن 24 | RB3/PGM — PORTB bit 3 / Low-voltage programming |
| پن 25 | RB4 — PORTB bit 4 |
| پن 26 | RB5 — PORTB bit 5 |
| پن 27 | RB6/PGC — PORTB bit 6 / ICSP clock |
| پن 28 | RB7/PGD — PORTB bit 7 / ICSP data |
| پن 29 | RD0/PSP0 — PORTD bit 0 / Parallel slave port bit 0 |
| پن 30 | RD1/PSP1 — PORTD bit 1 / Parallel slave port bit 1 |
| پن 31 | RD2/PSP2 — PORTD bit 2 / Parallel slave port bit 2 |
| پن 32 | RD3/PSP3 — PORTD bit 3 / Parallel slave port bit 3 |
| پن 33 | RD4/PSP4 — PORTD bit 4 / Parallel slave port bit 4 |
| پن 34 | RD5/PSP5 — PORTD bit 5 / Parallel slave port bit 5 |
| پن 35 | RD6/PSP6 — PORTD bit 6 / Parallel slave port bit 6 |
| پن 36 | RD7/PSP7 — PORTD bit 7 / Parallel slave port bit 7 |
| پن 37 | VSS — Ground (third pin) |
| پن 38 | VDD — Positive supply voltage (second pin) |
| پن 39 | RE0/RD/AN5 — PORTE bit 0 / Read control / Analog input 5 |
| پن 40 | RE1/WR/AN6 — PORTE bit 1 / Write control / Analog input 6 |
عام استعمالات
PIC16LC74A-04I/P کے لیے موزوں ہے 6 ایپلیکیشنs: Industrial Process Control Systems, Appliance Control Boards, Sensor Signal Conditioning, Educational 8-bit Microcontroller Platforms, Automotive Body Electronics (Non-Safety), LED Display and Signage Controllers.
Industrial Process Control Systems
The PIC16LC74A-04I/P fits industrial process control applications thanks to its 5-channel 8-bit ADC, 33 I/O pins, and USART for SCADA/modem connectivity. The PIC16C7X architecture's deterministic 1-MIPS performance at 4 MHz ensures predictable control loop timing for closed-loop valve and actuator control. The LC process technology enables reliable 3.3 V operation from a 24V industrial bus with a simple linear regulator. The -40C to +85C industrial temperature range covers factory floor and unheated enclosures.
تجویز کردہ
Appliance Control Boards
The PIC16LC74A-04I/P's 2 CCP modules deliver PWM for motor speed control in washing machines, dishwashers, and HVAC damper actuators. Its 33 I/O pins connect directly to LED indicators, keypads, and triac-driven AC loads with zero-cross optoisolators. OTP memory locks the firmware to prevent field tampering, while the 2.5 V to 6 V supply range works from 5 V regulated rails. The 192-byte RAM supports state-machine control loops without external memory.
تجویز کردہ
Sensor Signal Conditioning
The PIC16LC74A-04I/P's integrated 8-bit ADC and USART enable cost-efficient analog sensor hub designs for industrial 4-20 mA loops and bridge sensor interfaces. The 5 analog channels are adequate for multi-sensor PCB modules (temperature, pressure, humidity) where the MCU performs linearization and serial telemetry. The 4 MHz CPU supports 10 ms polling loops, the typical refresh interval for environmental sensors. The LC process keeps quiescent current low for solar-powered remote sensors.
تجویز کردہ
Educational 8-bit Microcontroller Platforms
The PIC16LC74A-04I/P serves as a learning platform in university embedded systems courses, where students program the OTP part with MPLAB XC8 and PICkit 3. Its 33 I/O pins and full peripheral set (ADC, USART, PWM, timers) provide exposure to the complete 8-bit MCU feature set without flash write-cycle complexities. The 40-pin PDIP form factor fits standard 0.1 inch pitch solderless breadboards, simplifying lab use.
تجویز کردہ
Automotive Body Electronics (Non-Safety)
The PIC16LC74A-04I/P is suited for non-safety automotive body modules including lighting controllers, seat position memories, and HVAC blend door actuators. The 33 I/O drive low-side MOSFETs for LED arrays and small DC motors directly, with PWM for fade-in/out dimming via the CCP modules. The -40C to +85C rating covers cabin and underhood-adjacent environments. For safety-critical modules, migrate to PIC18F family with automotive AEC-Q100 grade.
تجویز کردہ
LED Display and Signage Controllers
The PIC16LC74A-04I/P's 33 I/O drive multiplexed 7-segment LED matrices and dot-matrix signs without external drivers when brightness is moderate. The CCP modules generate multiplex refresh without CPU load, and the USART connects to upstream serial control busses (RS-485 or RS-232). OTP memory secures the message set from field tampering in commercial signage. The 192-byte RAM is sufficient for 16-character scrolling buffers.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا PIC16LC74A-04I/P — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | PIC16C74A-04I/P | PIC16LC74A-04I/PQ | PIC16LC74A-04/P | PIC16F74-I/P |
|---|---|---|---|---|---|
| Package | 40-pin PDIP (DIP-40) | 40-pin PDIP - same | 44-pin MQFP - same silicon, different footprint | 40-pin PDIP - same | 40-pin PDIP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 7 KB OTP (4K x 14) | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB Flash |
| RAM | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes |
| Operating Voltage | 2.5 V to 6 V (LC) | 3.5 V to 6 V (C) | 2.5 V to 6 V | 2.5 V to 6 V | 2.0 V to 5.5 V |
| Temperature Range | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | 0C to +70C (Commercial) | -40C to +85C |
| Max CPU Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz |
| Memory Type | OTP - one-time write | OTP - one-time write | OTP - one-time write | OTP - one-time write | Flash - in-system reprogrammable |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Active |
اہم امتیازی خصوصیات
- Low-voltage LC process enables 2.5 V operation (بمقابلہPIC16C74A-04I/P)
- Flash memory enables in-system reprogramming (بمقابلہPIC16F74-I/P)
- 33 I/O pins support widest mid-range connectivity (بمقابلہPIC16LC73A-04I/P)
ڈیزائن نوٹس
PIC16LC74A-04I/P uses OTP (One-Time Programmable) memory that cannot be erased or rewritten after programming. Use windowed PIC16C74A-04I/P (with quartz window, suffix /JW) or PIC16F74-I/P for prototyping and firmware iteration. Once OTP bits are written, the only way to fix bugs is a new silicon revision, so test firmware thoroughly on flash or windowed equivalents before committing to OTP parts.
The LC (low-power CMOS) variant supports 2.5 V to 6 V supply, enabling direct 3.3 V operation from a low-dropout regulator. For sleep-mode designs, verify clock source on OSC1 is stopped or running from Timer1 with a 32.768 kHz crystal to retain time-of-day functionality. Brown-out reset (BOR) is recommended below 4.5 V VDD to prevent code runaway during battery droop. Use MCP1700 LDO for stable 3.3 V from a 5 V rail.
The 40-pin PDIP package requires standard 0.1 inch (2.54 mm) through-hole pads with at least 0.6 mm hole diameter for robust wave-soldering. Place VDD/VSS decoupling capacitors (100 nF ceramic + 10 uF tantalum) within 5 mm of pins 11/12 and 31/32 with short traces to ground plane. For analog ADC accuracy, separate AVdd/AVss is not present on this part; use a ferrite bead on VDD and a clean analog ground to improve ADC noise performance.
For reliable ICSP (In-Circuit Serial Programming) via PICkit 3/ICD, expose the PGC (pin 27), PGD (pin 28), and MCLR/VPP (pin 1) signals on a 0.1 inch header. Add a 10 kohm pull-up on MCLR to VDD and a 100 nF capacitor from MCLR to ground for noise immunity; do NOT omit the MCLR capacitor or the MCU may spontaneously reset in noisy environments. Reserve space for a through-hole crystal plus 22 pF loading capacitors on pins 8/9.
تعمیل کی معلومات
RoHS and REACH compliance status not specified in verified distributor data; Microchip typically marks legacy OTP PIC16C7X family as non-RoHS due to OTP process, but no certificate was verified. Part is not AEC-Q100 qualified for automotive safety applications.
