PIC16F639-E/SO - 8-Bit PIC MCU w/ KeeLoq, 3.5KB Flash | Microchip
MPN: PIC16F639-E/SO ✓ فعالPIC16F639-E/SO جائزہ
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and peripheral interfaces on one die. Within the broader taxonomy it sits under microcontroller -> microcontroller IC -> integrated circuit -> semiconductor. The PIC16F639 specifically belongs to Microchip's PIC16 mid-range family, characterized by a 14-bit instruction set and only 35 single-word instructions to learn, making it a popular low-cost general-purpose MCU.
Key features of the PIC16F639-E/SO include hardware KeeLoq cipher engine for secure rolling-code remote keyless entry applications, nanoWatt technology for low-power operation with several sleep modes, an internal 8 MHz oscillator, an enhanced USART, a capture/compare/PWM module, and a synchronous serial port that can be configured as either SPI or I2C master/slave. The device also integrates a 5-channel 10-bit ADC and dual comparators with programmable references.
The PIC16F639 is engineered around Microchip's mid-range PIC16 core with a RISC Harvard architecture, providing deterministic single-cycle instruction execution except for program branches. The on-chip KeeLoq cryptographic module enables secure encrypted transmissions without external crypto ICs, while the 256-byte EEPROM is sized to securely store rolling-code transmission counters and encryption keys.
Typical applications include secure remote keyless entry (RKE) transmitters, automotive immobilizers, passive anti-theft systems, secure RFID transceivers, low-cost authentication tokens, and industrial secure-access controllers. The cryptographic hardware makes the part especially valuable where encrypted RF transmission is required while still keeping the BOM small.
When designing with the PIC16F639-E/SO, ensure the LF/RF front-end design follows the KeeLoq reference manual for EMI and antenna tuning. The SO package requires standard 20-SOIC PCB layout with adequate decoupling on VDD and a 100 nF bypass capacitor placed within 5 mm of the supply pin.
This page synthesizes distributor pricing, drop-in package-compatible alternatives, and practical design notes not found in the manufacturer datasheet alone, optimized for engineers sourcing the PIC16F639-E/SO for secure low-power embedded designs.
کے لیے ڈراپ اِن متبادل PIC16F639-E/SO — 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 PIC16F639-E/SO (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Core Architecture, I/O Pins, ADC, Comparators, Internal Oscillator.
PIC16F639-I/SO
✅ ڈراپ-اِن ⚠️ تفصیلات غیر تصدیق شدہ📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
PIC16F639T-I/SO
✅ ڈراپ-اِن ⚠️ تفصیلات غیر تصدیق شدہ📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
PIC16F636-I/SO
✅ ڈراپ-اِن ⚠️ تفصیلات غیر تصدیق شدہ📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
PIC16F636-E/SO
✅ ڈراپ-اِن ⚠️ تفصیلات غیر تصدیق شدہ📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
PIC16F631-I/SO
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16F639-E/SO زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Product Type | 8-bit Microcontroller (MCU) |
| Core Architecture | PIC16 (mid-range, 14-bit instructions) |
| Program Memory (Flash) | 3.5 KB (2K x 14) |
| RAM | 128 bytes |
| EEPROM | 256 bytes |
| زیادہ سے زیادہ کلاک فریکوئنسی | 20 MHz |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| I/O Pins | 11 |
| ADC | 10-bit, 5 channels |
| Comparators | 2 (with programmable reference) |
| Cryptographic Module | KeeLoq-compatible hardware cipher |
| PLVD (Programmable Low-Voltage Detect) | Yes |
| Communication Peripherals | Enhanced USART, SSP (SPI / I2C), CCP |
| Timers | Timer0, Timer1, Timer2 |
| Oscillator Options | Internal 8 MHz, external, LP/HS/XT/RC modes |
| آپریٹنگ درجہ حرارت | -40 C to +125 C |
| پیکیج | 20-pin SOIC (SO) - SOIC-20 |
| ماؤنٹنگ ٹائپ | Surface Mount |
| MSL لیول | 1 |
| RoHS اسٹیٹس | Compliant |
PIC16F639-E/SO پن کنفیگریشن
| پن 1 | RA5/T1CKI/OSC1/CLKIN — I/O / Timer1 clock / oscillator input |
| پن 2 | RA4/AN3/T1G/OSC2/CLKOUT — I/O / ADC input / Timer1 gate / oscillator output |
| پن 3 | RA3/MCLR/VPP — I/O / Master Clear (reset) / programming voltage |
| پن 4 | RA2/AN2/COUT/T0CKI/INT — I/O / ADC / comparator output / Timer0 clock / external interrupt |
| پن 5 | RA1/AN1/C1-/C2-/VREF — I/O / ADC / comparator inverting inputs / voltage reference |
| پن 6 | RA0/AN0/C1+/C2+/CVREF — I/O / ADC / comparator non-inverting inputs / CV reference |
| پن 7 | VSS — Ground reference |
| پن 8 | KIE / RB7 — KeeLoq indicator / I/O |
| پن 9 | RB6 — I/O port B bit 6 |
| پن 10 | RB5 — I/O port B bit 5 |
| پن 11 | RB4 — I/O port B bit 4 |
| پن 12 | RB3/CCP1 — I/O / Capture-Compare-PWM |
| پن 13 | RB2/SDI/SDA — I/O / SPI data in / I2C data |
| پن 14 | RB1/SDO/SCL — I/O / SPI data out / I2C clock |
| پن 15 | RB0/SCK/SCL — I/O / SPI clock |
| پن 16 | VDD — Positive supply voltage (2.0 V to 5.5 V) |
| پن 17 | RC7/RX/DT — I/O / USART RX / data |
| پن 18 | RC6/TX/CK — I/O / USART TX / clock |
| پن 19 | RC5 — I/O port C bit 5 |
| پن 20 | RC4 — I/O port C bit 4 |
عام استعمالات
PIC16F639-E/SO کے لیے موزوں ہے 6 ایپلیکیشنs: Automotive Remote Keyless Entry (RKE), Automotive Immobilizer / Passive Anti-Theft, Garage Door / Gate Opener Transmitter, Secure Industrial Access Token, Wireless Security Sensor / PIR Detector, Smart Meter Tamper-Detection Module.
Automotive Remote Keyless Entry (RKE)
The PIC16F639-E/SO's integrated KeeLoq hardware cipher makes it a natural fit for secure rolling-code RKE transmitters. The 3.5 KB Flash holds the KeeLoq encoder plus USART-driven RF transmit routines; the 256-byte EEPROM stores up to several transmission counters and encryption keys with 1M-cycle endurance. The 2.0-5.5 V supply allows direct connection to a single CR2032 coin cell while nanoWatt sleep modes extend battery life to multi-year lifetimes typical of automotive remotes. The 11 I/O pins easily accommodate 4-5 button inputs, an LED indicator, and a KeeLoq-coded RF data line to an external SAW-based or PLL transmitter such as the MICRF112 or MAX1472.
تجویز کردہ
Automotive Immobilizer / Passive Anti-Theft
In passive immobilizer systems the PIC16F639-E/SO acts as the LF base-station decoder that authenticates the transponder before allowing engine start. Its hardware KeeLoq block validates the rolling-code challenge-response in real time while the 10-bit ADC monitors the LF antenna tuning and the comparators detect presence of the key fob. The dual analog comparators also handle amplitude-shift keying demodulation from the LF receiver front-end. Operating temperature of -40 C to +125 C ensures reliable operation in automotive underhood and cabin environments across global climate zones.
تجویز کردہ
Garage Door / Gate Opener Transmitter
The PIC16F639-E/SO provides cost-effective encrypted transmission for residential and commercial garage-door or gate openers where KeeLoq security prevents code-grabbing replay attacks. Its 35-instruction PIC16 mid-range core is well within the budget of a small handheld 3-button transmitter; the 256-byte EEPROM stores 32-bit encrypted counters and the secret manufacturer key. The wide 2.0-5.5 V supply range supports a 3 V coin cell or a 3.6 V Li-SOCl2 primary battery for a 10-year shelf life.
تجویز کردہ
Secure Industrial Access Token
For industrial access tokens the PIC16F639-E/SO combines KeeLoq rolling-code encryption with the enhanced USART to communicate with an external secure RFID/NFC front end. The 10-bit ADC supports battery-voltage telemetry sent back over the secure channel, while nanoWatt sleep modes drop consumption below 100 nA between button presses to give years of life from a single coin cell. Programmable Low-Voltage Detect (PLVD) issues a graceful tamper flag when the supply falls below the secure-storage threshold.
تجویز کردہ
Wireless Security Sensor / PIR Detector
Wireless PIR or window/door sensors benefit from the PIC16F639-E/SO's low-power nanoWatt modes combined with secure KeeLoq-encoded transmissions to the alarm panel. The MCU spends >99% of its time in sleep consuming sub-microamp current and wakes on interrupt from the PIR or comparator threshold detection. The 2 comparators provide accurate window-comparator action on the PIR analog front-end; the 10-bit ADC reads battery and temperature for telemetry. Encryption prevents replay attacks that defeat simple fixed-code wireless sensors.
تجویز کردہ
Smart Meter Tamper-Detection Module
Smart electricity and water meters require tamper detection with cryptographic authentication - an ideal role for the PIC16F639-E/SO. The PLVD detects supply-side tamper attempts; the comparators monitor magnetic-field sensors; and the KeeLoq cipher securely transmits tamper events back to the utility's head-end system. The 256-byte EEPROM stores audit logs and key material with cryptographic write protection. The -40 C to +125 C rating handles outdoor meter enclosures and meter-base temperature extremes.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا PIC16F639-E/SO — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | PIC16F639-I/SO | PIC16F639T-I/SO | PIC16F636-I/SO | PIC16F636-E/SO | PIC16F631-I/SO |
|---|---|---|---|---|---|---|
| Package | SOIC-20 (SO) | SOIC-20 (SO) - same | SOIC-20 (SO) - same | SOIC-20 (SO) - same | SOIC-20 (SO) - same | SOIC-20 (SO) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Architecture | PIC16 mid-range 8-bit | PIC16 mid-range 8-bit | PIC16 mid-range 8-bit | PIC16 mid-range 8-bit | PIC16 mid-range 8-bit | PIC16 mid-range 8-bit |
| Program Memory (Flash) | 3.5 KB (2K x 14) | 3.5 KB (2K x 14) | 3.5 KB (2K x 14) | 3.5 KB (2K x 14) | 3.5 KB (2K x 14) | 1.75 KB (-50%) |
| RAM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 128 bytes (-50%) | 128 bytes (-50%) | None (-100%) |
| KeeLoq Crypto Engine | Yes | Yes | Yes | No | No | No |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Supply Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| Operating Temperature | -40 C to +125 C (extended) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | -40 C to +125 C (extended) | -40 C to +85 C (industrial) |
اہم امتیازی خصوصیات
- Integrated hardware KeeLoq cipher engine (بمقابلہPIC16F636-I/SO)
- 256-byte secure EEPROM for keys and counters (بمقابلہPIC16F631-I/SO)
- Mid-range PIC16 core with 5 MIPS throughput (بمقابلہPIC16F630-E/P)
- nanoWatt technology for sub-uA sleep (بمقابلہPIC16F636-E/SO)
ڈیزائن نوٹس
Estimated: at 20 MHz / 5 V the PIC16F639-E/SO draws approximately 11 mA active, dropping to <1 uA in sleep. For a coin-cell RKE transmitter running mostly in sleep, average consumption of 1-2 uA is achievable, giving 5+ years of life from a 220 mAh CR2032. Always place a 100 nF decoupling capacitor within 5 mm of the VDD pin (pin 16) and a 10 uF bulk capacitor if a noisy regulator is upstream. Estimated battery-life figures are first-order only; always characterize your application.
MCLR (pin 3) must be pulled to VDD through a 10 kohm resistor; never leave it floating, or the device will intermittently reset. For ICSP programming, isolate MCLR from the rest of the circuit so the high-voltage VPP pulse does not back-drive external components. The KeeLoq module must be enabled in configuration bits (CWG bit) or the encryption routines will silently no-op, causing security failure in production.
For RF transmitters driven from PIC16F639-E/SO, keep the KeeLoq-coded data line short and away from the antenna trace. The PIC's enhanced USART provides clean 9-bit data framing needed for fixed-format transmitter modules such as MAX1472; use a hardware timer rather than software bit-banging to ensure jitter-free data edges. Place a series resistor (100-330 ohm) on the data line to dampen ringing into the SAW resonator.
At 20 MHz and 5 V the PIC16F639-E/SO dissipates roughly 50 mW internally. The SOIC-20 package thermal resistance is approximately 80 C/W (estimated), giving a junction rise of 4 C above ambient - well within the 125 C limit. No special thermal management is required even inside a sealed automotive keyfob enclosure.
تعمیل کی معلومات
RoHS compliant per Microchip product page. Not AEC-Q100 qualified; for automotive AEC-Q100 requirements consult Microchip automotive-grade PIC portfolio.
