PIC16C74A-20E/PQ - 8-Bit CMOS MCU, 7KB OTP, 33 I/O | Microchip
MPN: PIC16C74A-20E/PQ ⚠ آخری بار خریداریPIC16C74A-20E/PQ جائزہ
An 8-bit microcontroller is a single-chip computer built around an 8-bit data path, integrating CPU, program memory, RAM, and peripherals into one IC. It belongs to the broader hierarchy of microcontrollers -> microcontrollers (MCU) -> embedded computing -> semiconductors. The PIC16C7X family specifically targets cost-sensitive embedded control designs requiring on-chip A/D conversion, timers, synchronous/asynchronous serial ports, and parallel I/O in a single device.
Key features include 33 digital I/O pins across five ports, 25/25 mA high sink/source current capability per pin, an instruction set of only 35 single-word instructions with all single-cycle except program branches (two cycles), and three timer/counter modules. Brown-out reset and a watchdog timer enhance field reliability. The 'E' suffix indicates the extended industrial temperature range of -40 °C to +125 °C.
Architecture-wise, the PIC16C74A-20E/PQ uses a Harvard RISC core with a 14-bit instruction word and separate program and data buses, allowing instruction fetch and operand access in one cycle. The integrated successive-approximation A/D converter supports 8 channels with 8-bit resolution, and dual analog comparators plus a Capture/Compare/PWM module make it suitable for closed-loop control.
Typical applications include industrial process control nodes, automotive body controllers (extended temp), appliance motor control, smart sensor signal conditioning, and embedded data acquisition systems. The high-current I/O allows direct LED and relay drive without buffers.
When designing with this part, ensure Vdd decoupling with a 100 nF ceramic close to the pins and respect the maximum clock frequency (20 MHz at 4.0–6.0 V). OTP memory cannot be re-programmed in-circuit, so production programming via ICSP is required.
This page synthesizes distributor pricing, drop-in alternatives from the same PIC16C7X family, and practical design notes not found in the original Microchip datasheet.
کے لیے ڈراپ اِن متبادل PIC16C74A-20E/PQ — 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 PIC16C74A-20E/PQ (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Package, Core Architecture, Serial Interfaces, Program Memory Size, Timers.
PIC16C74A-20/PQ
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16C74A-20I/PQ
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16C74A-04/PQ
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16C74A-10/PQ
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16C74AT-20E/PQ
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16C67-20E/PQ
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
PIC16C74A-20E/PQ زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Architecture | 8-bit PIC16C mid-range RISC |
| Program Memory (ROM) | 7 KB OTP EPROM |
| Data Memory (RAM) | 192 bytes |
| زیادہ سے زیادہ کلاک فریکوئنسی | 20 MHz |
| Supply Voltage (Vdd) | 4.0 V to 6.0 V |
| آپریٹنگ درجہ حرارت رینج | -40 C to +125 C (extended 'E') |
| I/O Pins | 33 |
| A/D Converter | 8-channel, 8-bit |
| Instruction Set Size | 35 single-word instructions |
| Timers | 3 (Timer0, Timer1, Timer2) |
| I/O Sink/Source Current | 25 mA / 25 mA per pin |
| Standby Current (typ) | 15 µA at 5 V, 4 MHz; 1 µA at 3 V, 32 kHz |
| پیکیج | 44-pin MQFP (Metric Quad Flat Pack) |
| ماؤنٹنگ ٹائپ | Surface Mount |
| Lead-Free / RoHS | Extended-temp; check lot for lead-free status |
PIC16C74A-20E/PQ پن کنفیگریشن
| پن 1 | MCLR/Vpp — Master Clear (reset, active low) / programming voltage |
| پن 2 | RA0/AN0 — Port A bit 0 / analog channel 0 |
| پن 3 | RA1/AN1 — Port A bit 1 / analog channel 1 |
| پن 4 | RA2/AN2 — Port A bit 2 / analog channel 2 |
| پن 5 | RA3/AN3/Vref — Port A bit 3 / analog channel 3 / A/D Vref+ |
| پن 6 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| پن 7 | RA5/AN4/SS — Port A bit 5 / analog channel 4 / SPI slave select |
| پن 8 | Vss — Ground |
| پن 9 | OSC1/CLKI — Oscillator crystal input / external clock in |
| پن 10 | OSC2/CLKO — Oscillator crystal output / clock out |
| پن 11 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer1 oscillator output / Timer1 clock in |
| پن 12 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer1 oscillator in / CCP2 |
| پن 13 | RC2/CCP1 — Port C bit 2 / Capture/Compare/PWM1 |
| پن 14 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| پن 15 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| پن 16 | RC5/SDO — Port C bit 5 / SPI data out |
| پن 17 | RC6/TX/CK — Port C bit 6 / USART TX / clock |
| پن 18 | RC7/RX/DT — Port C bit 7 / USART RX / data |
| پن 19 | Vss — Ground |
| پن 20 | Vdd — Positive supply |
| پن 21 | RB0/INT — Port B bit 0 / external interrupt |
| پن 22 | RB1 — Port B bit 1 |
| پن 23 | RB2 — Port B bit 2 |
| پن 24 | RB3 — Port B bit 3 |
| پن 25 | RB4 — Port B bit 4 |
| پن 26 | RB5 — Port B bit 5 |
| پن 27 | RB6/PGC — Port B bit 6 / ICSP clock |
| پن 28 | RB7/PGD — Port B bit 7 / ICSP data |
| پن 29 | Vss — Ground |
| پن 30 | Vdd — Positive supply |
| پن 31 | NC — Not connected (per datasheet) |
| پن 32 | NC — Not connected (per datasheet) |
| پن 33 | RD0/PSP0 — Port D bit 0 / parallel slave port bit 0 |
| پن 34 | RD1/PSP1 — Port D bit 1 / parallel slave port bit 1 |
| پن 35 | RD2/PSP2 — Port D bit 2 / parallel slave port bit 2 |
| پن 36 | RD3/PSP3 — Port D bit 3 / parallel slave port bit 3 |
| پن 37 | RD4/PSP4 — Port D bit 4 / parallel slave port bit 4 |
| پن 38 | RD5/PSP5 — Port D bit 5 / parallel slave port bit 5 |
| پن 39 | RD6/PSP6 — Port D bit 6 / parallel slave port bit 6 |
| پن 40 | RD7/PSP7 — Port D bit 7 / parallel slave port bit 7 |
| پن 41 | RE0/RD/AN5 — Port E bit 0 / read control / analog channel 5 |
| پن 42 | RE1/WR/AN6 — Port E bit 1 / write control / analog channel 6 |
| پن 43 | RE2/CS/AN7 — Port E bit 2 / chip select / analog channel 7 |
| پن 44 | AVss — Analog ground |
عام استعمالات
PIC16C74A-20E/PQ کے لیے موزوں ہے 7 ایپلیکیشنs: Industrial Process Control Nodes, Automotive Body Controllers, Smart Sensor Signal Conditioning, Appliance Motor and PWM Control, Embedded Data Acquisition Systems, Educational and Hobbyist Robotics, Point-of-Sale Terminal Peripherals.
Industrial Process Control Nodes
The PIC16C74A-20E/PQ's 8-bit A/D converter, 33 I/O lines, and 25 mA sink/source capability suit it for distributed industrial sensor nodes measuring temperature, pressure, and flow in factory automation. The extended -40 °C to +125 °C temperature grade allows deployment inside unheated enclosures or near motor-drive heat sources. The 20 MHz clock and 35-instruction RISC core deliver 5 MIPS, enabling PID loops and Modbus-style polling without external logic. A 100 nF ceramic Vdd decoupling capacitor close to pins and a 10 µF bulk cap on the analog supply are recommended for A/D accuracy.
تجویز کردہ
Automotive Body Controllers
Body and chassis controllers such as lighting modules, seat controllers, and HVAC actuators benefit from the PIC16C74A-20E/PQ's extended temperature range and high-current 25 mA per-pin drive, which can sink relays and LEDs directly. The Capture/Compare/PWM module generates the control signals for DC motor speed, and the integrated timers support multiplexed switch-scanning routines. Although this part is OTP and pre-AEC-Q100, the extended temperature grade keeps it in service for underhood and underbody retrofit applications where cost dominates the BOM.
تجویز کردہ
Smart Sensor Signal Conditioning
The PIC16C74A-20E/PQ's 8-channel 8-bit A/D combined with two analog comparators allows direct interfacing to thermocouples, RTDs, and bridge-style pressure sensors with on-chip excitation. The 192-byte RAM is sufficient for sensor linearization tables and the 7 KB OTP holds calibration coefficients. The 20 MHz CPU executes sample-and-average filters and serial-protocol output to a host PLC or HMI. A separate AVdd pin pair with its own LC filter is recommended to keep switching noise out of the A/D conversion.
تجویز کردہ
Appliance Motor and PWM Control
Brush-DC and small universal-motor controllers in washers, dryers, and kitchen appliances use the PIC16C74A-20E/PQ's Capture/Compare/PWM module for closed-loop speed control. The 25 mA sink/source I/O directly drives optocouplers and low-side FETs without external buffers, reducing the BOM. Five I/O ports give plenty of keypad, LED, and tachometer inputs. A typical 50 Hz or 60 Hz mains-isolated design runs the part at 4 MHz to minimize EMI, leaving 16 MHz headroom.
تجویز کردہ
Embedded Data Acquisition Systems
Standalone data loggers for environmental monitoring, energy metering, and remote telemetry leverage the PIC16C74A-20E/PQ's 8-bit A/D, three timers, and asynchronous serial port. The 7 KB OTP holds sampling schedules and Modbus-RTU framing, while the 192-byte RAM buffers samples between transmissions. Sleep current under 1 µA at 3 V (with WDT) allows battery-powered deployments lasting years. Brown-out reset prevents corrupted logs during power dips.
تجویز کردہ
Educational and Hobbyist Robotics
The PIC16C74A-20E/PQ is popular in hobbyist robotics and university embedded courses because its 35-instruction RISC set is straightforward to teach and its 33 I/O pins can drive small DC servos, H-bridges, and IR sensors. The 20 MHz clock provides ample throughput for line-following and PID motor loops. The 44-MQFP package suits surface-mount breakout boards, and the ICSP programming header makes classroom flashing straightforward with PICkit tools.
تجویز کردہ
Point-of-Sale Terminal Peripherals
Bar-code scanners, receipt printers, and PIN-pad peripherals historically used the PIC16C74A-20E/PQ for keyboard scanning, LCD driving, and serial-port uplink. Its 25 mA per-pin capability directly drives LCD backlight transistors, while the 8-bit A/D reads battery voltage and temperature-compensation sensors. Although new POS designs use flash parts, this OTP variant remains in service in legacy retail terminals, with last-time-buy inventory available from authorized brokers.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا PIC16C74A-20E/PQ — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | PIC16C74A-20/PQ | PIC16C74A-20I/PQ | PIC16C74A-04/PQ | PIC16C74A-10/PQ | PIC16C74AT-20E/PQ | PIC16C67-20E/PQ |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-MQFP | 44-MQFP - same | 44-MQFP - same | 44-MQFP - same | 44-MQFP - same | 44-MQFP - same | 44-MQFP - same |
| Max Clock Speed | 20 MHz | 20 MHz | 20 MHz | 4 MHz | 10 MHz | 20 MHz | 20 MHz |
| Program Memory | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 8 KB OTP (no A/D) |
| A/D Converter | 8-ch, 8-bit | 8-ch, 8-bit | 8-ch, 8-bit | 8-ch, 8-bit | 8-ch, 8-bit | 8-ch, 8-bit | None |
| Temperature Range | -40 C to +125 C (E) | 0 to +70 C | -40 to +85 C (I) | 0 to +70 C | 0 to +70 C | -40 to +125 C (E) | -40 to +125 C (E) |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 | 33 |
| Supply Voltage | 4.0-6.0 V | 4.0-6.0 V | 4.0-6.0 V | 4.0-6.0 V | 4.0-6.0 V | 4.0-6.0 V | 4.0-6.0 V |
اہم امتیازی خصوصیات
- Extended -40 to +125 C temperature grade (بمقابلہPIC16C74A-20/PQ)
- Highest 20 MHz clock in the PIC16C74A family (بمقابلہPIC16C74A-04/PQ)
- Integrated 8-channel 8-bit A/D converter (بمقابلہPIC16C67-20E/PQ)
ڈیزائن نوٹس
Estimated: at 20 MHz and 5 V the PIC16C74A-20E/PQ draws about 15-25 mA. Place a 100 nF ceramic decoupling capacitor within 5 mm of each Vdd pin (44-MQFP has multiple Vdd pins at 20 and 30), plus a 10 µF bulk tantalum or ceramic on the main supply. Use a ferrite bead or LC filter between digital Vdd and analog AVdd to keep digital switching noise out of the A/D converter.
The 44-MQFP land pattern requires careful thermal relief on the pads to ease hand-rework and inspection. Keep analog traces (RA0-RA5, RE0-RE2) short and routed away from digital Port D traces and the parallel-slave-port bus. The MCLR/Vpp pin must have a 10 kohm pull-up to Vdd; the ICSP clock and data lines (RB6/RB7) should each have a series resistor of about 4.7 kohm for in-circuit programming isolation.
Do not exceed 4.0 V minimum Vdd; operation below this trips brown-out reset. The 'E' suffix parts operate to +125 °C but with derated clock speed. Watchdog timer must be cleared in firmware or it will reset the MCU every ~18 ms nominal. Remember that OTP memory cannot be erased - use PIC16F74 for development and only migrate to PIC16C74A-20E/PQ for production.
For long-trace oscillator operation, place the crystal and its load capacitors (typically 15-33 pF) within 5 mm of OSC1 and OSC2. Avoid routing the parallel slave port (RD0-RD7, RE0-RE2) near the oscillator to prevent capacitive crosstalk. If using the analog comparators, separate their inputs from digital switching signals by a guard trace tied to AVss.
تعمیل کی معلومات
OTP EPROM PIC16C7X family predates AEC-Q100 qualification; not AEC-Q100 qualified. RoHS/lead-free status varies by lot - check manufacturer certificate for specific date code. Microchip product page recommends migration to PIC16F74 for new designs.
