PIC16F627AT-I/SS - 8-Bit 20MHz 1.75KB Flash MCU | Microchip | SSOP-20
MPN: PIC16F627AT-I/SS ✓ Hoạt độngPIC16F627AT-I/SS Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, volatile data memory, and programmable I/O peripherals. The PIC16 mid-range family occupies the middle of Microchip's 8-bit PIC portfolio - simpler than PIC24/dsPIC but more capable than PIC10/12 baseline devices, and is widely used in cost-sensitive embedded control. The PIC16F627A/AT family introduced nanoWatt Technology, providing multiple low-power modes (sleep, watchdog timer-based wake, internal RC oscillator) that drop supply current into the microamp range during idle intervals.
Key features include an integrated 4MHz internal RC oscillator (eliminating external crystals for low-cost designs), a hardware USART for serial communications, a capture/compare/PWM module, two analog comparators with programmable references, and 128 bytes of EEPROM for non-volatile user data storage. The 35 single-word instruction RISC core enables code density comparable to larger 8-bit MCUs while fitting in the 1.75KB Flash budget.
Architecturally, the PIC16F627A uses a 14-bit instruction word, Harvard architecture with separate program and data buses, and a 16-level hardware stack. The 'A' silicon revision adds the USART module and enhanced comparators versus the original PIC16F627. The 'T' suffix in PIC16F627AT indicates Tape and Reel packaging for high-volume assembly, while the 'I' indicates the industrial -40C to +85C operating temperature range.
Typical applications include low-cost consumer appliances, automotive body electronics, security and alarm systems, remote controls, lighting ballasts, motor control auxiliary logic, and small-format sensor interface boards. The wide SSOP-20 footprint allows hand-soldering and prototyping alongside high-volume SMD assembly.
When designing with this part, engineers should note that the PIC16F627A has been superseded by the PIC16F18444 in many new designs - identical pinout but more memory and peripherals. For new designs, the PIC16F18444-I/SS is recommended unless legacy code compatibility dictates the original 627A/AT. The internal oscillator eliminates two external pins but trades absolute frequency accuracy against BOM cost.
This page synthesizes distributor pricing, drop-in same-package alternatives from the PIC16F628A/648A family, and practical design considerations not aggregated in a single datasheet view.
Bộ thay thế dễ dàng lắp đặt cho PIC16F627AT-I/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 PIC16F627AT-I/SS (cùng hình factor và footprint) — khác nhau ở Package, Internal Oscillator, Timers, Operating Temperature, Core Architecture.
PIC16F627A-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F627AT-I/SO
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16F627AT-E/SO
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16F627-20I/P
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16F627-20E/SS
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16F627AT-I/SS Tỷ lệ tối đa & tính chất điện
| Product Family | PIC16 (mid-range 8-bit) |
| Core | PIC RISC (14-bit instruction word) |
| CPU Architecture | 8-bit Harvard |
| Instruction Set | 35 single-word instructions |
| Maximum CPU Frequency | 20 MHz |
| Instruction Cycle Time | 200 ns at 20 MHz |
| Flash Program Memory | 1.75 KB (1K x 14) |
| SRAM Data Memory | 224 bytes |
| EEPROM Data Memory | 128 bytes |
| Supply Voltage Range | 4.5 V to 5.5 V |
| I/O Pins | 16 |
| Internal Oscillator | 4 MHz (factory calibrated) |
| Nhiệt độ hoạt động | -40C to +85C (industrial) |
| Hộp | 20-pin SSOP (5.30 mm body, lead-free) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 1 (unlimited) |
| Trạng thái RoHS | Compliant |
| On-chip Peripherals | USART, CCP, 2x analog comparator |
Cấu hình chân PIC16F627AT-I/SS
| Chân 1 | RA2/AN2/CVREF — GPIO RA2 / analog input 2 / comparator reference output |
| Chân 2 | RA3/AN3/C1OUT — GPIO RA3 / analog input 3 / comparator 1 output |
| Chân 3 | RA4/T0CKI — GPIO RA4 / Timer0 clock input (open-drain) |
| Chân 4 | RA5/MCLR/VPP — Master Clear (reset) input / programming voltage |
| Chân 5 | VSS — Ground reference |
| Chân 6 | RB0/INT — GPIO RB0 / external interrupt input |
| Chân 7 | RB1/RX/DT — GPIO RB1 / USART RX / data line |
| Chân 8 | RB2/TX/CK — GPIO RB2 / USART TX / clock line |
| Chân 9 | RB3/CCP1 — GPIO RB3 / CCP1 PWM/capture/compare |
| Chân 10 | RB4/PGM — GPIO RB4 / LVP programming input |
| Chân 11 | RB5 — GPIO RB5 |
| Chân 12 | RB6/PGC — GPIO RB6 / ICSP clock |
| Chân 13 | RB7/PGD — GPIO RB7 / ICSP data |
| Chân 14 | VDD — Positive supply (4.5 V to 5.5 V) |
| Chân 15 | OSC2/CLKOUT/RA6 — Crystal output / CLKOUT / GPIO RA6 |
| Chân 16 | OSC1/CLKIN/RA7 — Crystal input / CLKIN / GPIO RA7 |
| Chân 17 | RA0/AN0 — GPIO RA0 / analog input 0 |
| Chân 18 | RA1/AN1 — GPIO RA1 / analog input 1 |
| Chân 19 | RA2 (alternate) — Not connected - duplicates pin 1; refer to pin 1 description |
| Chân 20 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
PIC16F627AT-I/SS phù hợp cho 6 Áp dụngs: Consumer Appliance Controllers, Automotive Body Electronics, Security and Alarm Panels, IR Remote Control Transmitters, Lighting Ballast Control Logic, Sensor Interface Boards.
Consumer Appliance Controllers
The PIC16F627AT-I/SS suits low-cost consumer appliance controllers where 16 I/O pins, 1.75 KB Flash and the integrated 4 MHz oscillator are sufficient. Its 224-byte SRAM and 128-byte EEPROM store run-time state and user preferences (timer settings, mode selections), while the 20 MHz CPU executes control loops in well under 1 ms. With industrial -40 C to +85 C operation and a robust SSOP-20 footprint, it survives the vibration and temperature swings of washing-machine, microwave-oven and small-kitchen-appliance PCB environments. The PIC RISC core's deterministic 200 ns instruction cycle simplifies real-time control of relays and TRIACs without an RTOS.
Được đề xuất
Automotive Body Electronics
The PIC16F627AT-I/SS is widely deployed in automotive body-electronics modules such as door-lock controllers, seat-position memory and lighting timers, where its industrial temperature range (-40 C to +85 C) matches cabin electronics requirements. The integrated USART interfaces with LIN/CAN transceiver ICs for body-network communication, while the hardware CCP module generates PWM for LED-dimming and motor-speed control. EEPROM retention of 40 years plus 1 million write cycles makes it suitable for storing odometer-style tamper-resistant data, and the SSOP-20 package withstands automotive vibration profiles when paired with underfilled solder joints. For harsher under-hood environments, designers should migrate to AEC-Q100-qualified PIC16F18444 variants.
Được đề xuất
Security and Alarm Panels
Security alarm panels benefit from the PIC16F627AT-I/SS's low-power nanoWatt sleep modes (sub-microamp standby) for battery-backed operation during AC mains loss, paired with its 16 I/O pins to read multiple zones (PIR motion, door/window contacts, glass-break detectors) and drive sirens and keypads. The integrated analog comparators directly sense low-battery conditions without an external ADC, while 128 bytes of EEPROM retain event logs and user arm/disarm codes across power cycles. The 5.5 V absolute-maximum tolerance protects the MCU against field-wiring transients that bypass protection TVS diodes. SSOP-20 enables compact panel enclosures where board height must stay below 10 mm.
Được đề xuất
IR Remote Control Transmitters
Battery-powered IR remote controls rely on the PIC16F627AT-I/SS for low-cost RC5/SIRC/ NEC protocol generation, where the integrated 4 MHz oscillator (with optional prescaler to 38 kHz carrier) eliminates the external crystal typical of older remote designs. nanoWatt sleep currents below 1 uA extend coin-cell battery life to multi-year horizons, and the hardware CCP module produces accurate 38 kHz / 40 kHz / 56 kHz carrier frequencies directly from the timer, freeing the CPU for key-scanning and protocol encoding. SSOP-20 hand-solders for prototyping and high-pincount keypads (4x4 or 5x5 matrices) fit comfortably within the 16 I/O budget after reserving one pin for the IR LED driver.
Được đề xuất
Lighting Ballast Control Logic
Fluorescent and HID ballast control logic commonly uses the PIC16F627AT-I/SS for digital lamp-startup sequencing, dimming curve generation and fault monitoring - tasks that require deterministic 200 ns instruction timing but modest memory (1.75 KB Flash holds the entire dimming profile and fault handler). The analog comparators directly sense ballast current/voltage without a discrete ADC, while the hardware CCP module generates variable-frequency PWM to drive the half-bridge or push-pull power stage. The 4.5 V to 5.5 V supply aligns with the auxiliary 5 V rail typical of electronic-ballast designs, and SSOP-20 thermal performance supports continuous operation at full ballast ambient temperatures up to 85 C.
Được đề xuất
Sensor Interface Boards
Small-form-factor sensor-interface boards for industrial measurement, building automation or HVAC use the PIC16F627AT-I/SS as a low-cost signal-conditioning and protocol-bridging controller. The USART produces Modbus RTU or proprietary serial output for upstream PLCs, while the two analog comparators with programmable voltage references implement window-detect or threshold-switch logic for analog sensor signals (temperature, pressure, level). The 16 I/O pins accept multiple discrete sensors (limit switches, optical flags) plus an I2C/SPI master interface for digital sensors; 128-byte EEPROM stores calibration constants across factory programming. SSOP-20 enables compact PCBAs inside sensor housings where height is constrained.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16F627AT-I/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 | PIC16F627A-I/SS | PIC16F627AT-I/SO | PIC16F627AT-E/SO | PIC16F627-20I/P | PIC16F627-20E/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin SSOP | 20-pin SSOP (same) | 20-pin SOIC | 20-pin SOIC | 20-pin DIP | 20-pin SSOP (same) |
| CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Flash Memory | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB |
| SRAM | 224 B | 224 B | 224 B | 224 B | 224 B | 224 B |
| EEPROM | 128 B | 128 B | 128 B | 128 B | 128 B | 128 B |
| Temperature Grade | -40C to +85C (industrial) | -40C to +85C | -40C to +85C | -40C to +125C (extended) | -40C to +85C | -40C to +125C (extended) |
| Shipping Carrier | Tape & Reel (1600 pcs) | Tube / Tray | Tape & Reel | Tape & Reel | Tube | Tube |
Bảo phân biệt quan trọng
- Same SSOP-20 footprint with tray shipping alternative (vsPIC16F627A-I/SS)
- SOIC-20 wider-pin footprint simplifies hand-soldering (vsPIC16F627AT-I/SO)
- Extended -40 C to +125 C grade for harsher environments (vsPIC16F627AT-E/SO)
Ghi chú thiết kế
Estimated: at 20 MHz CPU clock and 5.0 V supply, the PIC16F627AT-I/SS draws approximately 4 mA active and <1 uA in sleep mode. Place a 100 nF decoupling capacitor as close as possible to pin 14 (VDD) and pin 5 (VSS) to suppress switching transients; an additional 10 uF bulk capacitor on the supply rail improves voltage stability during USART-burst transmit events. The internal 4 MHz oscillator saves the BOM cost of two crystal-load capacitors.
The SSOP-20 footprint is 5.30 mm body width with 0.65 mm pitch - keep-out pads must be designed per IPC-7351 nominal and maximum land patterns. According to Microchip SSOP package drawing, hand-soldering requires a fine-tip iron (0.5 mm chisel) and flux-pen to prevent pin-bridges, especially for pin 4 (MCLR/VPP) and pins 6-13 (PORTB) which carry high-speed digital signals. Route the crystal traces (OSC1/OSC2) on the top layer with a guard ground to avoid injecting digital switching noise into the oscillator.
The PIC16F627AT-I/SS shares its configuration bits with later PIC16 family members; do NOT blindly apply PIC16F88 configuration templates - the 627A lacks an ADC and will ignore TRISA analog-mode bits. Brown-out-reset voltage thresholds must be configured explicitly (BOREN=ON, BORV=4.5V) for industrial 5 V designs, otherwise slow-rising supplies may cause undefined reset behavior. Pin 4 (MCLR) requires a 10 kohm pull-up to VDD for normal operation; tying it directly to VDD without the pull-up can cause ICSP programming failures on production boards.
Thông tin tuân thủ
RoHS compliant and lead-free per Microchip product page. AEC-Q100 qualification is NOT available for PIC16F627AT-I/SS; for AEC-Q100 qualified Microchip PIC16 alternatives, choose PIC16F18444 or PIC16F88 family variants.
