PIC16C72AT-20E/SS - 20MHz 8-bit OTP MCU, 28-SSOP | Microchip
MPN： PIC16C72AT-20E/SS ✓ 啟用中PIC16C72AT-20E/SS 概覽
An 8-bit PIC microcontroller (MCU) is a Harvard-architecture CMOS device that executes a compact, mostly single-cycle instruction set optimized for embedded control. Within Microchip's product tree, the PIC16C72A sits in the PIC16 mid-range family, which itself belongs to the broader 8-bit PIC microcontroller category and ultimately to the microcontroller branch of integrated circuits. OTP program memory allows one-time factory or field programming via a device programmer, making the part well-suited to production runs where flash reprogrammability is not required.
Key features include 35 single-word instructions, all single-cycle except for program branches (2 cycles), four interrupt sources, an internal oscillator option, and a watchdog timer with its own on-chip RC oscillator. The 22 I/O pins each sink up to 25 mA and source up to 20 mA, allowing direct drive of LEDs and small relays without external drivers. The high-performance RISC CPU executes most instructions in 200 ns at 20 MHz, deterministic timing that simplifies real-time control loops.
Typical applications include industrial automation and process control, appliance control boards, automotive body electronics (non-safety subsystems), sensor signal conditioning front-ends, and small consumer products. The wide operating temperature range (-40°C to +125°C for the 'E' industrial grade) and proven OTP silicon make it a reliable choice for mature designs.
When designing with this device, ensure the MCLR reset circuit follows Microchip application note recommendations, and place a 0.1 µF decoupling capacitor within 6 mm of each VDD pin to suppress switching noise on the analog reference.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical engineering notes not found in the manufacturer datasheet - giving procurement and design engineers a one-stop engineering reference.
直接替換替代品，適用於 PIC16C72AT-20E/SS — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC16C72AT-20E/SS （相同外形與佔位） — 差異在於 Maximum Clock Frequency, Program Memory Size, Program Memory Type, ADC, Core Architecture.
PIC16C72AT-20/SS
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16C72AT-04E/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC16C72-20E/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC16C72-10/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC16C72AT-20E/SS 最大額定值與電氣特性
| Core Architecture | PIC16C, 8-bit RISC |
| CPU Family | PIC16 mid-range |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 3.5 KB (2K x 14 words) |
| Data RAM | 128 x 8 bytes |
| 最大時脈頻率 | 20 MHz |
| Instruction Cycle | 200 ns (single cycle) |
| Supply Voltage (VDD) | 4.0 V to 5.5 V |
| I/O Pins | 22 |
| ADC | 5 channels x 8-bit |
| Operating Temperature Grade | -40C to +125C (industrial 'E') |
| 封裝 | 28-SSOP (5.30 mm body, 0.65 mm pitch) |
| 安裝類型 | Surface Mount |
PIC16C72AT-20E/SS 腳位配置
| 腳位 1 | MCLR/VPP — Master clear (reset) input / programming voltage |
| 腳位 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| 腳位 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| 腳位 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / ADC VREF- |
| 腳位 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC VREF+ |
| 腳位 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| 腳位 7 | RA5/SS/AN4 — PORTA bit 5 / SPI slave select / analog input 4 |
| 腳位 8 | OSC1/CLKIN — Oscillator crystal input / external clock in |
| 腳位 9 | OSC2/CLKOUT — Oscillator crystal output / clock out |
| 腳位 10 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator out / Timer1 clock in |
| 腳位 11 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator in / CCP2 |
| 腳位 12 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| 腳位 13 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| 腳位 14 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| 腳位 15 | RC5/SDO — PORTC bit 5 / SPI data out |
| 腳位 16 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| 腳位 17 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| 腳位 18 | VSS — Ground reference |
| 腳位 19 | VDD — Positive supply (4.0 V to 5.5 V) |
| 腳位 20 | RB0/INT — PORTB bit 0 / external interrupt |
| 腳位 21 | RB1 — PORTB bit 1 |
| 腳位 22 | RB2 — PORTB bit 2 |
| 腳位 23 | RB3/PGM — PORTB bit 3 / low-voltage programming |
| 腳位 24 | RB4 — PORTB bit 4 |
| 腳位 25 | RB5 — PORTB bit 5 |
| 腳位 26 | RB6/PGC — PORTB bit 6 / ICSP clock |
| 腳位 27 | RB7/PGD — PORTB bit 7 / ICSP data |
| 腳位 28 | VSS — Ground reference (second VSS pin) |
典型應用
PIC16C72AT-20E/SS 適用於 6 應用s: Industrial Process Control, Appliance Control Boards, Automotive Body Electronics, Sensor Signal Conditioning, Consumer Product Controllers, HVAC Control Modules.
Industrial Process Control
The PIC16C72AT-20E/SS fits industrial process control with its 8-bit PIC16 RISC core running 5 MIPS at 20 MHz, deterministic 200 ns single-cycle instruction timing, and 5-channel 8-bit ADC for sensor acquisition. Its 22 I/O pins each sink 25 mA to directly drive relays, solenoids, and indicator LEDs without external drivers, reducing BOM in a typical sensor and motor assembly. The OTP program memory and -40 to +125 C industrial temperature grade support long-life factory-floor deployment where flash reprogrammability is not required. Per Microchip application note AN1066, the integrated watchdog timer with its own RC oscillator improves reliability against runaway code.
推薦
Appliance Control Boards
The PIC16C72AT-20E/SS is well suited for washing machine, dishwasher, and HVAC appliance control boards where its 20 MHz PIC16 core, 22 I/O pins, and integrated USART drive triac-fired motor controls, sensor multiplexing, and front-panel key scans. The 5-channel 8-bit ADC reads temperature, water level, and motor current while the capture/compare/PWM module generates timing for brushless DC motor commutation. The OTP-only architecture gives a cost advantage over flash parts in high-volume appliance production where firmware is finalized before ramp. Per Microchip mid-range reference manual DS33023, the deterministic interrupt latency simplifies IEC 60730 class B safety software development.
推薦
Automotive Body Electronics
The PIC16C72AT-20E/SS handles non-safety automotive body-electronics modules including HVAC blend-door actuators, seat-position controllers, mirror adjusters, and interior lighting drivers, where its industrial -40 to +125 C temperature grade tolerates under-hood and cabin thermal swings. The integrated USART talks to body-network transceivers, while the 5-channel ADC reads position feedback and ambient light sensors. Note that this device is NOT AEC-Q100 qualified, so it is restricted to non-safety subsystems - choose an AEC-Q100-qualified PIC18 part for safety-critical ECUs. Per Microchip application note AN246, the on-chip EEPROM emulation in OTP provides calibration storage.
推薦
Sensor Signal Conditioning
The PIC16C72AT-20E/SS conditions analog sensor signals in industrial and consumer measurement products where its 5-channel 8-bit ADC, 128-byte RAM, and 20 MHz PIC16 core support 5 kHz sample rates with on-chip averaging. The 22 I/O pins drive status LEDs, keypad scans, and segment LCD multiplexers, while the integrated USART streams conditioned data to a host controller. The OTP-only architecture minimizes unit cost in high-volume sensor transmitters where firmware is locked at production. Per the PIC16C72A datasheet, the ADC achieves +/- 1 LSB typical INL and DNL under recommended operating conditions.
推薦
Consumer Product Controllers
The PIC16C72AT-20E/SS powers consumer product controllers such as coffee makers, blenders, and small kitchen appliances where its 20 MHz PIC16 core, 22 I/O pins, and integrated ADC handle temperature, motor speed, and user-interface tasks in a single chip. The OTP-only memory cuts unit cost versus flash parts when firmware is finalized before production ramp. The 25 mA sink capability drives seven-segment LED displays and small DC loads without external transistors. Per Microchip application note AN557, the integrated capture/compare/PWM module simplifies brushless DC fan control in consumer products.
推薦
HVAC Control Modules
The PIC16C72AT-20E/SS runs HVAC control modules where its 5-channel 8-bit ADC reads return-air temperature, supply-air temperature, humidity sensors, and pressure transducers, while the capture/compare/PWM module modulates blower motor speed and damper actuators. The integrated USART links to wall thermostats and zoning modules, and the 128-byte RAM buffers diagnostic logs. The -40 to +125 C industrial temperature grade handles attic and outdoor HVAC installations. Per Microchip application note AN897, the on-chip EEPROM emulation via OTP write/read patterns stores calibration constants.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16C72AT-20E/SS — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC16C72AT-20/SS | PIC16C72AT-04E/SS | PIC16C72-20E/SS | PIC16C72-10/SS |
|---|---|---|---|---|---|
| Package | 28-SSOP (5.30 mm) | 28-SSOP (5.30 mm) - same | 28-SSOP (5.30 mm) - same | 28-SSOP (5.30 mm) - same | 28-SSOP (5.30 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 4 MHz | 20 MHz | 10 MHz |
| Program Memory | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP |
| RAM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| Temperature Grade | Industrial (-40 to +125 C) | Commercial (0 to +70 C) | Industrial (-40 to +125 C) | Industrial (-40 to +125 C) | Commercial (0 to +70 C) |
| ADC | 5 ch x 8-bit | 5 ch x 8-bit | 5 ch x 8-bit | No ADC (legacy silicon) | No ADC (legacy silicon) |
| Silicon Generation | PIC16C72A | PIC16C72A | PIC16C72A | PIC16C72 (pre-A) | PIC16C72 (pre-A) |
| I/O Pins | 22 | 22 | 22 | 22 | 22 |
主要差異化特點
- Industrial temperature grade with OTP cost advantage (對比PIC16C72AT-20/SS)
- 20 MHz clock speed vs lower-cost 4 MHz variant (對比PIC16C72AT-04E/SS)
- Enhanced A-revision silicon with integrated ADC (對比PIC16C72-20E/SS)
設計說明
Estimated: VDD current draw for the PIC16C72AT-20E/SS at 20 MHz is approximately 15 mA active plus 2 mA per output pin loaded to 25 mA sink. Bulk-decouple VDD with 10 uF tantalum plus 0.1 uF ceramic within 6 mm of the VDD pin, and place a 0.1 uF capacitor on the AVSS-to-AVDD pair when using the ADC for clean analog reference.
Route the 20 MHz crystal traces symmetrically with short, matched lengths to OSC1 and OSC2, and place load capacitors within 3 mm of the oscillator pins. Per Microchip application note AN588, the ICSP pins (RB6/PGC, RB7/RB3-PGD) need a 10 kohm pull-up on MCLR/VPP for in-circuit serial programming - leaving this off prevents production programming.
Do not connect analog inputs above VDD + 0.3 V - the ADC input clamps will draw current and shift reference. The 'E' temperature grade part must be operated within 4.0 V to 5.5 V; operation below 4.0 V causes erratic ADC readings and brown-out resets. For in-system debug, do not drive PGC or PGD above VDD - programming failures and latch-up can occur.
合規資訊
RoHS, lead-free, halogen-free status not specified in provided web data and marked [DATA_NEEDED]. Not AEC-Q100 qualified - choose an automotive-grade PIC18 or dsPIC33 part for safety-critical ECUs. Conflict minerals compliance assumed per Microchip Technology corporate policy.
