PIC16C72A-20I/SS - 8-Bit 20MHz 3.5KB OTP MCU 28-SSOP | Microchip
MPN: PIC16C72A-20I/SS ✓ نشطPIC16C72A-20I/SS نظرة عامة
A microcontroller (MCU) is a single-chip computer containing a CPU core, non-volatile program memory, working RAM, and a set of programmable peripheral interfaces. The 8-bit class of microcontrollers dominates cost-sensitive embedded control tasks, where deterministic instruction timing and low power are valued more than raw throughput. PIC microcontrollers, originally pioneered by General Instrument and popularized by Microchip Technology, use a Harvard architecture with separate program and data buses and a reduced instruction set, allowing most instructions to execute in a single instruction cycle.
The PIC16C72A executes instructions in 200 ns at 20 MHz, and its core features an 8-level deep hardware stack, direct/indirect/relative addressing modes, and a programmable code protection bit. The five 8-bit ADC channels with input multiplexing support sensor acquisition without external analog components, while the 8-bit/16-bit Timer0/Timer1/Timer2 blocks and CCP module support PWM-driven motor, lighting and switching applications.
Operating from 2.5 V to 5.5 V (industry-standard 5 V), the PIC16C72A includes brown-out reset, power-on reset, watchdog timer with its own on-chip RC oscillator, and an in-circuit serial programming interface. The 28-SSOP package (209 mil body) provides 22 digital I/O lines with high-current sink/source capability. The OTP memory is one-time programmable, requiring factory or field programming before deployment.
Typical applications include appliance control, automotive body and chassis subsystems, HVAC fan and damper control, smart-card readers, battery chargers, and small-form-factor sensor interface boards. The wide operating temperature range of -40 °C to +85 °C (industrial grade, denoted by the I suffix) supports harsh environments.
When designing with this device, ensure adequate decoupling (100 nF ceramic at VDD) and reserve an MCLR pull-up since the master-clear pin is used for in-circuit programming. The OTP memory restricts firmware iteration in production; consider the PIC16F72 flash variant for development.
This page synthesizes distributor pricing, drop-in alternative MPNs, and practical design guidance not consolidated on the manufacturer datasheet.
بدائل مباشرة لـ PIC16C72A-20I/SS — 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 PIC16C72A-20I/SS (نفس عامل الشكل والبصمة) — يختلف في Timers, Package, ADC, Core Architecture, Data EEPROM.
PIC16C72A-20I/SS
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C72A-20I/ML
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C72-20I/SS
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C72-20/SS
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C72-20E/SS
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16F72-I/SS
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C72A-20I/SS الحدود القصوى والخصائص الكهربائية
| Core Architecture | PIC16C (8-bit RISC, Harvard) |
| Program Memory Type | OTP (One-Time-Programmable) EPROM |
| Program Memory Size | 3.5 KB (2K x 14) |
| Data RAM Size | 128 bytes |
| Maximum CPU Speed | 20 MHz (200 ns instruction cycle) |
| Instruction Set Size | 35 single-word instructions |
| Digital I/O Pins | 22 |
| ADC | 5 channels, 8-bit resolution |
| Timers | 3 (Timer0 8-bit, Timer1 16-bit, Timer2 8-bit) |
| CCP Modules | 1 (Capture/Compare/PWM) |
| Serial Interface | USART (SCI) |
| جهد التغذية | 2.5 V to 5.5 V |
| درجة حرارة التشغيل | -40 °C to +85 °C (Industrial) |
| العلبة | 28-SSOP (209 mil) |
| نوع التركيب | Surface Mount |
| مستوى MSL | 1 |
| حالة RoHS | Compliant |
| Watchdog Timer | Yes, with dedicated on-chip RC oscillator |
| Brown-out Reset | Yes |
| In-Circuit Programming | Yes (ICSP via MCLR/RB6/RB7) |
تكوين أطراف PIC16C72A-20I/SS
| دبوس 1 | MCLR/VPP — Master Clear (reset) input / programming voltage input |
| دبوس 2 | RA0/AN0 — Port A bit 0 / Analog input channel 0 |
| دبوس 3 | RA1/AN1 — Port A bit 1 / Analog input channel 1 |
| دبوس 4 | RA2/AN2 — Port A bit 2 / Analog input channel 2 |
| دبوس 5 | RA3/AN3/VREF — Port A bit 3 / Analog input channel 3 / ADC voltage reference |
| دبوس 6 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| دبوس 7 | RA5/AN4/SS — Port A bit 5 / Analog input channel 4 / SPI slave select |
| دبوس 8 | VSS — Ground reference |
| دبوس 9 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| دبوس 10 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| دبوس 11 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer1 oscillator output / Timer1 clock input |
| دبوس 12 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer1 oscillator input / CCP2 output |
| دبوس 13 | RC2/CCP1 — Port C bit 2 / CCP1 (PWM) output |
| دبوس 14 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| دبوس 15 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| دبوس 16 | RC5/SDO — Port C bit 5 / SPI data out |
| دبوس 17 | RC6/TX/CK — Port C bit 6 / USART TX / USART clock |
| دبوس 18 | RC7/RX/DT — Port C bit 7 / USART RX / USART data |
| دبوس 19 | VSS — Ground reference |
| دبوس 20 | VDD — Positive supply voltage |
| دبوس 21 | RB0/INT — Port B bit 0 / External interrupt input |
| دبوس 22 | RB1 — Port B bit 1 |
| دبوس 23 | RB2 — Port B bit 2 |
| دبوس 24 | RB3/PGM — Port B bit 3 / LVP programming input |
| دبوس 25 | RB4 — Port B bit 4 |
| دبوس 26 | RB5 — Port B bit 5 |
| دبوس 27 | RB6/PGC — Port B bit 6 / ICSP clock |
| دبوس 28 | RB7/PGD — Port B bit 7 / ICSP data |
التطبيقات النموذجية
PIC16C72A-20I/SS مناسب لـ 6 التطبيقs: White-Goods Appliance Control, Automotive Body Electronics, HVAC Fan and Damper Control, Battery Chargers and Power Management, Smart Sensor Interface Boards, Industrial Timer and Counter Modules.
White-Goods Appliance Control
The PIC16C72A-20I/SS is well suited to washing-machine, dishwasher, and microwave-oven control boards. Its 20 MHz PIC16 RISC core and 200 ns instruction cycle handle user-interface scanning, motor PWM drive via the CCP module, and relay sequencing with deterministic timing. The 5-channel 8-bit ADC reads water level, temperature, and humidity sensors directly, eliminating external analog components. OTP memory locks the firmware at production cost, while the 28-SSOP package withstands the thermal environment of an enclosed appliance chassis. Compared with newer Cortex-M0 parts, the PIC16C72A trades software flexibility for sub-$3 unit cost at volume.
موصى به
Automotive Body Electronics
Inside cabin and body-control modules, the PIC16C72A-20I/SS drives seat-position motors, mirror adjusters, and interior lighting via its CCP/PWM block and 22 digital I/O lines. The USART links to a body-control network, while the 5-channel 8-bit ADC reads switch positions and thermistor inputs. Operating from -40 °C to +85 °C industrial range, the part tolerates the cabin thermal envelope. For under-hood deployment, designers should select an AEC-Q100 qualified sibling such as PIC16F72-E/SS. The 28-SSOP footprint supports standard SMT lines already qualified for automotive Tier-1 contract manufacturers.
موصى به
HVAC Fan and Damper Control
Fan-speed regulators, zone dampers, and thermostat actuators use the PIC16C72A-20I/SS because of its three timers and dedicated CCP/PWM module, which together generate the variable-duty drive signals for triac-gated AC motors. The 5-channel 8-bit ADC reads NTC room sensors and humidity transducers simultaneously, while the USART provides a Modbus or simple UART link to a central HVAC controller. Brown-out reset and watchdog timer with a dedicated on-chip RC oscillator protect the design against supply droop common to long motor wiring.
موصى به
Battery Chargers and Power Management
Lead-acid and lithium-ion charger designs use the PIC16C72A-20I/SS to implement CC/CV charge profiles. The 8-bit ADC monitors battery voltage and charge current with 5 mV resolution (5 V reference / 1024), while the PWM output drives a buck converter at up to 20 MHz instruction rate. The watchdog timer resets the charger if firmware hangs, and brown-out reset protects against partial brown-out during solar or generator input. Operating from 2.5 V to 5.5 V, the MCU runs directly from a 3.3 V regulator for single-cell Li-ion packs.
موصى به
Smart Sensor Interface Boards
Sensor hubs aggregating temperature, pressure, and flow transmitters leverage the PIC16C72A-20I/SS's 5-channel 8-bit ADC, three timers, and USART to build compact multi-transmitter boards. The 20 MHz core executes linearization and basic compensation algorithms within 200 ns per instruction, supporting 10 kHz sample rates across all channels. The 28-SSOP package mounts on standard industrial sensor PCBs and survives -40 °C to +85 °C industrial environments. The OTP memory locks calibration coefficients, reducing field-tampering risk.
موصى به
Industrial Timer and Counter Modules
Programmable logic controllers, conveyor sequencers, and industrial counter modules use the PIC16C72A-20I/SS to combine the 16-bit Timer1, the 8-bit Timer0 and Timer2, and the CCP module into precise event counters and PWM outputs. The USART supports RS-232 or RS-485 comms to a master PLC, while the 22 digital I/O lines interface to optocouplers and 24 V industrial signals via external drivers. The hardware stack of 8 levels handles nested interrupt-driven routines without software stack overflow.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC16C72A-20I/SS — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC16C72-20I/SS | PIC16C72-20/SS | PIC16C72-20E/SS | PIC16F72-I/SS |
|---|---|---|---|---|---|
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Program Memory Type | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | Flash (reprogrammable) |
| Program Memory Size | 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) |
| Maximum CPU Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Data RAM Size | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| ADC Channels | 5 x 8-bit | 5 x 8-bit | 5 x 8-bit | 5 x 8-bit | 5 x 8-bit |
| Operating Temperature | -40 °C to +85 °C (Industrial) | -40 °C to +85 °C (Industrial) | 0 °C to +70 °C (Commercial) | -40 °C to +125 °C (Extended) | -40 °C to +85 °C (Industrial) |
أبرز الفروقات
- Industrial temperature range in 28-SSOP for cost-sensitive production (مقابلPIC16C72-20/SS)
- Flash-programmable drop-in alternative available (مقابلPIC16F72-I/SS)
- Compact QFN option for height-constrained designs (مقابلPIC16C72A-20I/ML)
ملاحظات التصميم
Place a 100 nF ceramic decoupling capacitor within 5 mm of each VDD pin (pins 9 and 20) and a bulk 10 µF tantalum or aluminium-polymer capacitor at the board supply input. The PIC16C72A-20I/SS contains an internal power-on reset and brown-out reset; the brown-out trip voltage is programmable but the firmware-default 4.0 V threshold suits most 5 V systems. Estimated: with VDD = 5 V and I_DD = 2 mA at 20 MHz, each decoupling cap dissipates negligible power, but traces should be short to limit switching transients on adjacent ADC channels.
Route the OSC1/OSC2 traces short and symmetric, guarding them with a ground ring on both sides when using a high-speed crystal (>16 MHz). Place the crystal within 5 mm of the MCU and avoid running digital signal traces parallel to the oscillator traces. The MCLR pin must have a 10 kΩ pull-up to VDD and a 100 nF cap to ground for in-circuit serial programming (ICSP) and reliable reset. Use the SSOP-28 land pattern with thermal relief spokes to ease hand-rework without cold joints.
Avoid powering the PIC16C72A-20I/SS below 2.5 V - the ADC and brown-out reset lose accuracy. Do not leave the MCLR pin floating; a floating MCLR causes intermittent resets. The OTP memory is one-time programmable, so commit firmware only after full validation on a PIC16F72-I/SS Flash prototype - migrating back from C72A to F72 requires no PCB changes. Estimated: programming the OTP on a factory line requires 13 V VPP on MCLR for 100 ms via the Microchip MPLAB PM3, so provision an ICSP header for factory programming even if no field updates are planned.
معلومات الامتثال
Per Microchip product page and DigiKey listing. Industrial -40 to +85 °C temperature grade only; the I suffix denotes industrial range. Not AEC-Q100 qualified - select PIC16F72-E/SS for automotive.
