PIC16F648A-I/P - 8-bit 20MHz 7KB FLASH MCU 18-PDIP | Microchip
MPN: PIC16F648A-I/P ✓ نشطPIC16F648A-I/P نظرة عامة
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (Flash/ROM), data memory (RAM), and peripherals on one die. PIC microcontrollers use a Harvard RISC architecture with a small, fixed instruction set, executing one instruction per instruction cycle (4 clock cycles), which makes them predictable and easy to program in C or assembly. The PIC16F648A belongs to the mid-range PIC16F family, sitting between PIC12C/PIC16C5X baseline parts and PIC18F enhanced parts in Microchip's product hierarchy.
Key features include 35 single-word instructions, 200 ns instruction execution at 20 MHz, 16 digital I/O pins, two 8-bit timers and one 16-bit timer, ICD (In-Circuit Debugger) support, nanoWatt power management for sleep currents below 1 uA typical, and code protection with both read and write protection bits. The on-chip peripherals (USART, CCP, comparators, ADC, PWM) eliminate external glue logic in many designs.
Typical applications include appliance control panels, automotive body controllers, industrial sensor interfaces, battery chargers, small motor control, remote keyless entry receivers, smart thermostats, and consumer device user interfaces. The PIC16F648A is fully static and supports wide operating conditions, making it suitable for harsh environments.
When designing, ensure the ICSP/ICD pins (RB6, RB7) are accessible for in-circuit programming and debugging. The internal 4 MHz oscillator is accurate to ±1% typical, which is sufficient for UART baud rates at common frequencies. Use decoupling capacitors of 100 nF and 10 uF close to VDD.
A newer device PIC16F18444 is recommended by Microchip as a migration path; however, the PIC16F648A-I/P remains active for legacy designs. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
بدائل مباشرة لـ PIC16F648A-I/P — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع PIC16F648A-I/P (نفس عامل الشكل والبصمة) — يختلف في Package, Internal Oscillator, Operating Temperature, RoHS Status, Core Architecture.
PIC16F628A-I/P
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16F627A-I/P
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16F648A-I/ML
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16F648A-E/SO
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16F88-I/P
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16F628A-I/ML
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC16F648A-I/P الحدود القصوى والخصائص الكهربائية
| Core Architecture | PIC16 mid-range 8-bit RISC |
| Program Memory Type | Flash |
| Program Memory Size | 7 KB (4K x 14 words) |
| RAM Size | 256 bytes |
| EEPROM Size | 256 bytes |
| Maximum CPU Speed | 20 MHz (200 ns instruction cycle) |
| جهد التغذية | 2.0 V to 5.5 V (4.5 V to 5.5 V for Flash programming) |
| I/O Pins | 16 |
| Internal Oscillator | 4 MHz (±1% typical) |
| Timers | 2 x 8-bit, 1 x 16-bit |
| USART | 1 x enhanced USART |
| CCP Module | 1 x Capture/Compare/PWM |
| Comparators | 2 analog comparators with programmable voltage reference |
| PWM Channels | 1 (10-bit) |
| Instruction Set | 35 single-word instructions |
| درجة حرارة التشغيل | -40C to +85C (industrial, I suffix) |
| العلبة | 18-pin PDIP (P, 0.300 inch, through-hole, lead-free) |
| ICSP/ICD | Yes (RB6/RB7 clock/data) |
| Power-Saving Modes | nanoWatt sleep, watchdog timer, brown-out reset |
| حالة RoHS | Compliant |
تكوين أطراف PIC16F648A-I/P
| دبوس 1 | RA2/AN2 — Port A bit 2 / analog input 2 |
| دبوس 2 | RA3/AN3/VREF+ — Port A bit 3 / analog input 3 / ADC positive reference |
| دبوس 3 | RA4/AN4/T0CKI — Port A bit 4 / analog input 4 / Timer0 clock input |
| دبوس 4 | RA5/MCLR/VPP — Port A bit 5 / master clear reset (active low) / programming voltage |
| دبوس 5 | VSS — Ground reference |
| دبوس 6 | RB0/INT — Port B bit 0 / external interrupt |
| دبوس 7 | RB1/RX/DT — Port B bit 1 / USART receive / data |
| دبوس 8 | RB2/TX/CK — Port B bit 2 / USART transmit / clock |
| دبوس 9 | RB3/CCP1 — Port B bit 3 / Capture Compare PWM 1 output |
| دبوس 10 | RB4/PGM — Port B bit 4 / ICSP programming |
| دبوس 11 | RB5 — Port B bit 5 |
| دبوس 12 | RB6/PGC — Port B bit 6 / ICSP clock (debug) |
| دبوس 13 | RB7/PGD — Port B bit 7 / ICSP data (debug) |
| دبوس 14 | VDD — Positive supply voltage (2.0 V to 5.5 V) |
| دبوس 15 | OSC2/CLKOUT — Oscillator output / clock-out |
| دبوس 16 | OSC1/CLKIN — Oscillator input / clock-in |
| دبوس 17 | RA0/AN0 — Port A bit 0 / analog input 0 |
| دبوس 18 | RA1/AN1 — Port A bit 1 / analog input 1 |
التطبيقات النموذجية
PIC16F648A-I/P مناسب لـ 6 التطبيقs: Appliance Control Panels, Automotive Body Controllers, Industrial Sensor Interfaces, Battery Chargers, Small Motor Control (BLDC/Fan), Remote Keyless Entry Receivers.
Appliance Control Panels
The PIC16F648A-I/P fits washing-machine, dishwasher, and microwave control panels where its 16 I/O pins drive 7-segment displays, keypad matrices, and indicator LEDs directly. With 7 KB Flash, complex state machines and user-interface logic (menu navigation, timer sequences, fault handling) fit without external memory. The integrated USART interfaces with inverter boards or sensor modules, while the 10-bit ADC reads temperature sensors for thermal safety. Compared to discrete logic, the PIC16F648A-I/P reduces BOM cost and PCB area; compared to PIC18F alternatives, it offers lower cost at slightly less performance. The 2.0 V to 5.5 V supply range allows direct battery or rectified-5V operation.
موصى به
Automotive Body Controllers
The PIC16F648A-I/P powers interior body modules such as seat controllers, mirror adjusters, and lighting dimmers where its 16 I/O drive multiple LEDs, relays, and H-bridge drivers. The USART interfaces with the vehicle CAN/LIN gateway, while the 2 comparators monitor current sense for short-circuit detection. Industrial -40C to +85C operation handles cabin temperatures. The 7 KB Flash stores complex LED-fade sequences and diagnostic routines. For under-hood or safety-critical modules, upgrade to AEC-Q100 qualified variants. Compared to ASIC-based body controllers, this MCU offers software flexibility for variant differentiation across vehicle trim levels.
موصى به
Industrial Sensor Interfaces
The PIC16F648A-I/P excels as a 4-20 mA loop-powered sensor transmitter or RTD/thermocouple conditioner. Its 10-bit ADC reads analog sensors, while the 2 analog comparators handle threshold detection for alarm outputs. The 256-byte EEPROM stores calibration coefficients persistently across power cycles. The USART provides RS-485 or Modbus connectivity to PLCs. The 2.0 V minimum supply supports battery or energy-harvesting power. The nanoWatt sleep modes (below 1 uA) extend battery life in wireless sensor nodes. Compared to op-amp-only analog designs, this MCU adds digital linearization and remote calibration.
موصى به
Battery Chargers
The PIC16F648A-I/P controls multi-stage lead-acid, NiMH, or Li-ion chargers with its integrated CCP/PWM generating the switching drive signal and 10-bit ADC monitoring charge current and battery voltage. The 2 comparators provide instant over-current and over-voltage shutdown independent of software loop time, a critical safety function. 7 KB Flash implements CC-CV-termination algorithms, temperature compensation, and LED status indication. The 16 I/O drive 4-quadrant LED bars, keypad inputs, and relay outputs. Compared to dedicated charger ASICs, this MCU supports multiple battery chemistries via firmware and offers programmable charge profiles for OEM differentiation.
موصى به
Small Motor Control (BLDC/Fan)
The PIC16F648A-I/P drives small brushless DC fans and pumps with its CCP/PWM generating complementary PWM outputs and the 10-bit ADC reading back-EMF for sensorless commutation. The USART provides RPM telemetry to host controllers, while 2 comparators detect stalled-rotor and over-current conditions. 7 KB Flash holds sinusoidal commutation tables and soft-start routines. The wide 2.0 V to 5.5 V supply supports 3.3 V logic and direct 5 V motor drive. Compared to pure-hardware BLDC controllers, this MCU adds variable-speed curves, fault logging, and field-upgradeable firmware.
موصى به
Remote Keyless Entry Receivers
The PIC16F648A-I/P decodes RF remote commands in 315/433 MHz keyless entry and garage-door-opener receivers. The USART or external interrupt captures demodulated Manchester or PWM data, while the 7 KB Flash holds rolling-code decryption algorithms and receiver pairing logic. The nanoWatt sleep mode (under 1 uA) extends coin-cell battery life to 5+ years. The 16 I/O drive LEDs, buzzers, and relay outputs for door actuators. The 2.0 V minimum supply works with depleted battery stacks. Compared to fixed-logic decoder ICs, this MCU supports multiple transmission protocols via firmware.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC16F648A-I/P — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC16F628A-I/P | PIC16F627A-I/P | PIC16F648A-I/ML | PIC16F648A-E/SO | PIC16F88-I/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-PDIP (P) | 18-PDIP (P) | 18-PDIP (P) | 28-QFN (ML) | 18-SOIC (SO) | 18-PDIP (P) |
| Flash Memory | 7 KB (4K x 14) | 3.5 KB (-50%) | 1.75 KB (-75%) | 7 KB (same) | 7 KB (same) | 7 KB (same) |
| RAM | 256 bytes | 224 bytes (-12%) | 224 bytes (-12%) | 256 bytes (same) | 256 bytes (same) | 368 bytes (+44%) |
| EEPROM | 256 bytes | 128 bytes (-50%) | 128 bytes (-50%) | 256 bytes (same) | 256 bytes (same) | 256 bytes (same) |
| Maximum CPU Speed | 20 MHz | 20 MHz (same) | 20 MHz (same) | 20 MHz (same) | 20 MHz (same) | 20 MHz (same) |
| Supply Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V (same) | 2.0 V to 5.5 V (same) | 2.0 V to 5.5 V (same) | 2.0 V to 5.5 V (same) | 2.0 V to 5.5 V (same) |
| I/O Pins | 16 | 16 (same) | 16 (same) | 16 (same) | 16 (same) | 16 (same) |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C (same) | -40C to +85C (same) | -40C to +85C (same) | -40C to +125C (extended) | -40C to +85C (same) |
| Internal Oscillator | 4 MHz | 4 MHz (same) | 4 MHz (same) | 4 MHz (same) | 4 MHz (same) | 8 MHz (2x faster) |
أبرز الفروقات
- Largest Flash in 18-pin PIC16F6xx family (مقابلPIC16F628A-I/P)
- Doubles EEPROM for persistent parameter storage (مقابلPIC16F628A-I/P)
- Pin-compatible with extended-temperature variant (مقابلPIC16F648A-E/SO)
- Lower-memory but cheaper alternative exists (مقابلPIC16F627A-I/P)
ملاحظات التصميم
Place a 100 nF ceramic decoupling capacitor as close as possible to the VDD pin (pin 14) with the ground return to pin 5 (VSS). For designs switching heavy loads or using the ADC, add a 10 uF tantalum or aluminum bulk capacitor near the MCU. The PIC16F648A-I/P's nanoWatt sleep modes drop I_DD below 1 uA at 3 V when properly configured with the internal oscillator and all peripherals disabled. Brown-Out Reset (BOR) should be enabled in CONFIG to prevent code corruption during supply dips below 2.0 V.
Reserve space for the ICSP header on pins 12 (PGC) and 13 (PGD), plus pin 4 (MCLR/VPP) routed through a 10 kohm pull-up. This allows in-circuit programming and ICD debugging without removing the MCU from the board. Keep the ICSP traces short (under 100 mm) and away from switching signals to prevent programming errors. Pin 4 (MCLR) should NOT be left floating - use the internal MCLR enable or an external pull-up.
When using the internal 4 MHz oscillator, the UART baud-rate error can exceed 2% at higher baud rates (e.g., 115200). Use the BRGH=1 (high-speed) mode and consider an external crystal for UART-heavy applications. The ADC reference voltage defaults to VDD; for accurate readings, drive VREF+ (RA3) with a stable reference or use the internal fixed-voltage-reference module. Watchdog timer should be enabled and periodically cleared in firmware to recover from software faults - Microchip application note AN584 covers PICmid-range watchdog best practices.
The PIC16F648A-I/P's analog inputs (AN0-AN4) share pins with digital I/O; configure unused analog pins as digital outputs to prevent floating-input ADC noise. When using the ADC at high source impedances (greater than 10 kohm), add a 100 pF capacitor on the analog input to limit bandwidth and prevent sampling errors. The internal 4 MHz oscillator is accurate to ±1% typical but can drift with temperature; for time-critical protocols consider an external 20 MHz crystal on OSC1/OSC2.
معلومات الامتثال
RoHS-compliant lead-free 18-PDIP per Microchip product page. Industrial -40C to +85C temperature grade (I suffix). Not AEC-Q100 qualified - for automotive applications use AEC-Q100 parts such as PIC16F648AT-E/PT or PIC16F648A-I/MLVAO.
