PIC16C72A-20I/SS - 8-Bit 20MHz 3.5KB OTP MCU 28-SSOP | Microchip
MPN: PIC16C72A-20I/SS ✓ Hoạt độngPIC16C72A-20I/SS Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho PIC16C72A-20I/SS — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC16C72A-20I/SS (cùng hình factor và footprint) — khác nhau ở Timers, Package, ADC, Core Architecture, Data EEPROM.
PIC16C72A-20I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C72A-20I/ML
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C72-20I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C72-20/SS
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C72-20E/SS
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16F72-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C72A-20I/SS Tỷ lệ tối đa & tính chất điện
| 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) |
| Điện áp cung cấp | 2.5 V to 5.5 V |
| Nhiệt độ hoạt động | -40 °C to +85 °C (Industrial) |
| Hộp | 28-SSOP (209 mil) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 1 |
| Trạng thái RoHS | Compliant |
| Watchdog Timer | Yes, with dedicated on-chip RC oscillator |
| Brown-out Reset | Yes |
| In-Circuit Programming | Yes (ICSP via MCLR/RB6/RB7) |
Cấu hình chân PIC16C72A-20I/SS
| Chân 1 | MCLR/VPP — Master Clear (reset) input / programming voltage input |
| Chân 2 | RA0/AN0 — Port A bit 0 / Analog input channel 0 |
| Chân 3 | RA1/AN1 — Port A bit 1 / Analog input channel 1 |
| Chân 4 | RA2/AN2 — Port A bit 2 / Analog input channel 2 |
| Chân 5 | RA3/AN3/VREF — Port A bit 3 / Analog input channel 3 / ADC voltage reference |
| Chân 6 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| Chân 7 | RA5/AN4/SS — Port A bit 5 / Analog input channel 4 / SPI slave select |
| Chân 8 | VSS — Ground reference |
| Chân 9 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| Chân 10 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| Chân 11 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer1 oscillator output / Timer1 clock input |
| Chân 12 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer1 oscillator input / CCP2 output |
| Chân 13 | RC2/CCP1 — Port C bit 2 / CCP1 (PWM) output |
| Chân 14 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| Chân 15 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| Chân 16 | RC5/SDO — Port C bit 5 / SPI data out |
| Chân 17 | RC6/TX/CK — Port C bit 6 / USART TX / USART clock |
| Chân 18 | RC7/RX/DT — Port C bit 7 / USART RX / USART data |
| Chân 19 | VSS — Ground reference |
| Chân 20 | VDD — Positive supply voltage |
| Chân 21 | RB0/INT — Port B bit 0 / External interrupt input |
| Chân 22 | RB1 — Port B bit 1 |
| Chân 23 | RB2 — Port B bit 2 |
| Chân 24 | RB3/PGM — Port B bit 3 / LVP programming input |
| Chân 25 | RB4 — Port B bit 4 |
| Chân 26 | RB5 — Port B bit 5 |
| Chân 27 | RB6/PGC — Port B bit 6 / ICSP clock |
| Chân 28 | RB7/PGD — Port B bit 7 / ICSP data |
Ứng dụng tiêu biểu
PIC16C72A-20I/SS phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C72A-20I/SS — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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) |
Bảo phân biệt quan trọng
- Industrial temperature range in 28-SSOP for cost-sensitive production (vsPIC16C72-20/SS)
- Flash-programmable drop-in alternative available (vsPIC16F72-I/SS)
- Compact QFN option for height-constrained designs (vsPIC16C72A-20I/ML)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
