PIC16C642-10I/SO - 8-Bit OTP MCU, 7KB EPROM, 22 I/O | Microchip
MPN: PIC16C642-10I/SO ✓ نشطPIC16C642-10I/SO نظرة عامة
Background context: An 8-bit microcontroller is a single-chip computer integrating a CPU, non-volatile program memory (here, OTP EPROM), working RAM, and peripherals into one package. Within the taxonomy, the PIC16C642 belongs to the OTP-EPROM PIC16 mid-range family, which sits below the PIC18 family and above base-line PIC10/12/14 devices. These MCUs are widely used in cost-sensitive, low-volume, or ruggedized embedded designs where field reprogramming is not required and the simplicity of the PIC RISC core outweighs the larger code density of 16-bit alternatives.
Key features include a 200 ns instruction cycle, 8-level hardware stack, power-on reset, brown-out detection, watchdog timer with its own on-chip RC oscillator, programmable code protection, and selectable oscillator modes (RC, XT, HS, LP). The two on-chip analog comparators feature programmable on-chip voltage reference and rail-to-rail inputs, allowing direct interface to analog sensors without external op-amps. Code protection and an ICD-friendly architecture simplify prototyping and production.
The architecture combines a RISC Harvard CPU with separate program and data buses, achieving deterministic single-cycle execution except for program branches (two cycles). With 128 bytes of EEPROM data memory on-die, designers can store calibration constants, serial numbers, or runtime configuration that survives power cycles without external storage.
Common applications include industrial control panels, appliance controllers, automotive body modules, security-system sensor interfaces, and consumer remote controls. The wide supply range and on-chip analog comparators suit battery chargers, and the 22 I/O pins comfortably drive keypads, LED arrays, and small character displays.
Design tip: choose the oscillator mode carefully - HS requires an external crystal up to 20 MHz, XT up to 4 MHz, LP minimizes quiescent current for battery operation, and RC mode uses an external resistor/capacitor for the lowest BOM cost. Always place a decoupling capacitor within 5 mm of VDD and use an isolation resistor on MCLR for in-circuit debugging.
This page synthesizes distributor pricing tiers, same-brand drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
بدائل مباشرة لـ PIC16C642-10I/SO — 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 PIC16C642-10I/SO (نفس عامل الشكل والبصمة) — يختلف في Program Memory Type, Maximum Clock Frequency, Core Architecture, Operating Temperature Range, Package Type.
PIC16C642-04E/SO
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C642-04/SO
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C642T-10I/SO
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC16C642-10E/SO
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC16F628-I/SO
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC16C642-10I/SO الحدود القصوى والخصائص الكهربائية
| Program Memory Type | OTP EPROM |
| Program Memory Size | 7 KB (4K x 14) |
| Data EEPROM | 128 bytes |
| RAM | 176 bytes |
| CPU Core | 8-bit PIC16 RISC |
| Instruction Set | 35 single-word instructions |
| Instruction Cycle Time | 200 ns |
| أقصى تردد للساعة | 10 MHz |
| Supply Voltage (VDD) | 4.0 V to 5.5 V |
| I/O Pins | 22 |
| Analog Comparators | 2 (with programmable on-chip Vref) |
| Timers | Timer0 (8-bit), Timer1 (16-bit), Timer2 (8-bit with PWM) |
| Capture/Compare/PWM | 1 CCP module |
| Hardware Stack | 8 levels |
| Watchdog Timer | Yes (with dedicated on-chip RC oscillator) |
| Brown-out Reset | Yes |
| Power-on Reset | Yes |
| In-Circuit Debug | ICD-capable |
| Oscillator Modes | RC, XT, HS, LP |
| نطاق درجة حرارة التشغيل | -40 C to +85 C (Industrial, 'I' suffix) |
| Package Type | 28-pin SOIC (300-mil, 'SO' suffix) |
| نوع التركيب | Surface Mount |
| مستوى MSL | 1 (unlimited floor life) |
تكوين أطراف PIC16C642-10I/SO
| دبوس 1 | RA2 — PORTA bit 2 (digital I/O, analog input) |
| دبوس 2 | RA3 — PORTA bit 3 (digital I/O, analog input) |
| دبوس 3 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input (open-drain) |
| دبوس 4 | RA5 — PORTA bit 5 (digital I/O, analog input) |
| دبوس 5 | VSS — Ground reference |
| دبوس 6 | RB0/INT — PORTB bit 0 / external interrupt input |
| دبوس 7 | RB1 — PORTB bit 1 |
| دبوس 8 | RB2 — PORTB bit 2 |
| دبوس 9 | RB3 — PORTB bit 3 |
| دبوس 10 | RB4 — PORTB bit 4 (interrupt-on-change) |
| دبوس 11 | RB5 — PORTB bit 5 (interrupt-on-change) |
| دبوس 12 | RB6 — PORTB bit 6 (interrupt-on-change, ICD clock) |
| دبوس 13 | RB7 — PORTB bit 7 (interrupt-on-change, ICD data) |
| دبوس 14 | VDD — Positive supply (4.0 V to 5.5 V) |
| دبوس 15 | OSC2/CLKOUT — Oscillator output / clock out |
| دبوس 16 | OSC1/CLKIN — Oscillator input / external clock in |
| دبوس 17 | RC0 — PORTC bit 0 |
| دبوس 18 | RC1 — PORTC bit 1 |
| دبوس 19 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| دبوس 20 | RC3 — PORTC bit 3 |
| دبوس 21 | RC4 — PORTC bit 4 |
| دبوس 22 | RC5 — PORTC bit 5 |
| دبوس 23 | RC6 — PORTC bit 6 |
| دبوس 24 | RC7 — PORTC bit 7 |
| دبوس 25 | MCLR/VPP — Master clear (reset) / programming voltage |
| دبوس 26 | RA0 — PORTA bit 0 (analog comparator input) |
| دبوس 27 | RA1 — PORTA bit 1 (analog comparator input) |
| دبوس 28 | VREF — Comparator reference voltage input |
التطبيقات النموذجية
PIC16C642-10I/SO مناسب لـ 7 التطبيقs: Industrial Control Panel Interface, Appliance Motor Controller, Automotive Body Electronics Module, Security System Sensor Interface, Remote Control Transmitter, Battery Charger Controller, Smart Sensor Node with LED Display.
Industrial Control Panel Interface
The PIC16C642-10I/SO is well suited to industrial HMI panels where 22 I/O pins drive 4x4 keypads and multiplexed 7-segment displays without external logic. Its 7 KB OTP program memory accommodates state-machine firmware for menu navigation, while the two on-chip analog comparators monitor panel supply voltage and over-temperature conditions via NTC thermistors. Industrial -40C to +85C operation and brown-out reset ensure reliable cold-crank and brown-out recovery on factory DC bus rails.
موصى به
Appliance Motor Controller
In washing machines, dishwashers, and small kitchen appliances, the PIC16C642-10I/SO provides closed-loop control of universal motors and triac-driven pumps. The CCP module generates PWM at configurable duty cycles for soft-start ramps, while Timer1 captures zero-crossing events from the mains for phase-angle control. The 176-byte RAM holds calibration tables for wash-cycle algorithms, and the on-chip comparators sense motor current via shunt resistors for stall detection without a dedicated op-amp.
موصى به
Automotive Body Electronics Module
The PIC16C642-10I/SO is widely deployed in body control modules for seat controllers, mirror adjusters, and lighting clusters. Its 22 I/O pins drive multiple relays and LEDs while the Watchdog Timer with dedicated RC oscillator resets the MCU on software lockup. The two comparators monitor battery voltage (cranking detection) and ambient light via a photodiode for automatic headlamp control. OTP EPROM prevents field firmware tampering and reduces per-unit BOM cost in high-volume automotive programs.
موصى به
Security System Sensor Interface
PIR motion detectors, glass-break sensors, and door-magnet interfaces leverage the PIC16C642-10I/SO's two analog comparators to discriminate sensor signals from noise without external op-amps. The Watchdog Timer prevents lockup-induced false alarms, while 176 bytes RAM buffer alarm event queues. Low-power LP oscillator mode with 32 kHz crystal minimizes quiescent current for battery-backed PIRs with multi-year standby life.
موصى به
Remote Control Transmitter
Garage-door openers, ceiling-fan remotes, and consumer IR/RF transmitters use the PIC16C642-10I/SO for protocol encoding (RC5, NEC, proprietary). The 22 I/O can scan 8-button keypads directly, and the USART-less architecture keeps BOM minimal. Sleep mode with Watchdog wake-up draws microamp-level current, enabling coin-cell operation for years. OTP EPROM locks firmware to prevent cloning by competitors.
موصى به
Battery Charger Controller
Lead-acid and NiMH chargers use the PIC16C642-10I/SO to implement CC-CV charge profiles. The two comparators monitor battery voltage and charge current via sense resistors, while the PWM module regulates the buck converter duty cycle. With 128 bytes of EEPROM, calibration constants for chemistry-specific voltage thresholds persist across power cycles. OTP EPROM prevents accidental firmware changes that could damage battery packs.
موصى به
Smart Sensor Node with LED Display
IoT edge nodes with local display feedback (temperature loggers, environmental monitors) pair the PIC16C642-10I/SO with character LCDs and indicator LEDs. Its 22 I/O drive a 16x2 character LCD in 4-bit mode while leaving pins for SPI/I2C sensors. The two comparators handle threshold-based alerting without ADC overhead, and 7 KB OTP holds rich UI state machines. Brown-out reset ensures clean LCD initialization on low-battery conditions.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC16C642-10I/SO — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC16C642-04E/SO | PIC16C642-04/SO | PIC16C642T-10I/SO | PIC16C642-10E/SO | PIC16F628-I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-pin SOIC (300-mil) | 28-pin SOIC (300-mil) - same | 28-pin SOIC (300-mil) - same | 28-pin SOIC (300-mil) - same | 28-pin SOIC (300-mil) - same | 28-pin SOIC (300-mil) - same |
| Program Memory | 7 KB OTP EPROM | 7 KB OTP EPROM - same | 7 KB OTP EPROM - same | 7 KB OTP EPROM - same | 7 KB OTP EPROM - same | 3.5 KB Flash (reprogrammable) |
| RAM | 176 bytes | 176 bytes - same | 176 bytes - same | 176 bytes - same | 176 bytes - same | 224 bytes (+27%) |
| Max Clock Speed | 10 MHz | 4 MHz (-60%) | 4 MHz (-60%) | 10 MHz - same | 10 MHz - same | 20 MHz (+100%) |
| I/O Pins | 22 | 22 - same | 22 - same | 22 - same | 22 - same | 16 (-27%) |
| Analog Comparators | 2 | 2 - same | 2 - same | 2 - same | 2 - same | 2 - same |
| USART Module | No | No | No | No | No | Yes (added) |
| Temperature Range | -40C to +85C (Industrial) | -40C to +125C (Extended) | 0C to +70C (Commercial) | -40C to +85C - same | -40C to +125C (Extended) | -40C to +85C - same |
أبرز الفروقات
- Higher 10 MHz clock speed grade vs 04 MHz variants (مقابلPIC16C642-04/SO)
- Industrial -40C to +85C temperature range (مقابلPIC16C642-04/SO)
- Two integrated analog comparators with programmable Vref (مقابلPIC16C622 family)
ملاحظات التصميم
Place a 0.1 uF decoupling capacitor within 5 mm of the VDD pin (pin 14) and a bulk 10 uF electrolytic on the same supply rail. The PIC16C642 draws up to 30 mA at full I/O load and 5 V, so a regulator with at least 50 mA headroom (e.g., 7805 or LDO) is recommended. For battery operation, configure the brown-out reset (BOR) at 4.0 V to ensure deterministic shutdown below the MCU's safe VDD minimum.
Select the oscillator mode carefully. RC mode (lowest cost) requires external R/C components with frequency dependent on tolerance. XT mode supports crystals up to 4 MHz. HS mode supports up to 20 MHz at 5 V but draws more current. LP mode with a 32 kHz crystal minimizes quiescent current to ~20 uA for Sleep mode battery designs. Always keep the crystal load capacitors (typically 15-33 pF) close to the OSC1/OSC2 pins to minimize EMI.
For in-circuit debugging, connect MCLR through a 10 kohm pull-up resistor (not directly to VDD) so the debugger can pull MCLR low to enter ICD mode. RB6 and RB7 are shared with the ICD clock/data lines; design them with sufficient isolation (no direct high-current loads) so debugger communication is not disrupted. RB3 is the ICD low-voltage programming entry pin and must NOT be pulled low at power-up in production.
Do not use PORTB internal weak pull-ups on RB0 (INT pin) for wake-up from Sleep if external noise may couple - use an external pull-up. The MCLR pin must NOT be left floating - always tie to VDD through a resistor (typically 10 kohm). The PORTA analog inputs (RA0-RA5) require clearing the PCFG bits in ADCON1 even if the ADC is unused, otherwise the digital input buffers are disabled and the pins read as 0.
معلومات الامتثال
RoHS compliance for PIC16C642-10I/SO is [DATA_NEEDED: RoHS status] - the legacy PIC16C OTP family was launched before strict RoHS deadlines, so individual lots may be RoHS-exempt under 7(c)-I (lead in glass) or fully RoHS-compliant. AEC-Q100 automotive qualification is not applicable for the standard 'I' industrial grade - automotive designs should use the PIC16C642-10E/SO (extended temp) or a PIC16F automotive-grade equivalent.
