PIC16F627AT-I/SO - 8-Bit 20MHz MCU 1.75KB Flash SOIC-18 | Microchip
料号： PIC16F627AT-I/SO ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.62 | $26.20 |
| 100 | $2.31 | $231.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.83 | $1,830.00 |
PIC16F627AT-I/SO 概述
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash/ROM), data memory (RAM), non-volatile data storage (EEPROM), and programmable I/O peripherals on one die. The PIC16F627A belongs to the PIC16F family within the broader mid-range PIC architecture hierarchy: PIC16F -> mid-range 8-bit MCU -> RISC microcontroller -> embedded controller. This taxonomy places it above simple digital logic but below 32-bit ARM Cortex-M parts in computational capability, making it ideal for cost-sensitive, deterministic, low-power applications.
Key features include the nanoWatt power management technology offering multiple low-power sleep modes (down to 100 nA typical standby current), two analog comparators, a programmable voltage reference, one 16-bit capture/compare/PWM module, a USART for serial communication, and a 4 MHz internal RC oscillator that can reduce or eliminate external clock components. The device supports an operating voltage range of 3.3V to 5.5V and provides 16 digital I/O pins with high-current sink/source capability.
Technically, the PIC16F627A executes most instructions in a single 200 ns instruction cycle at 20 MHz (4 MHz oscillator input, 4:1 PLL-equivalent internal division), with a 14-bit instruction word and 8-bit data path. The Harvard architecture separates program and data buses, eliminating fetch bottlenecks. The enhanced flash memory cell supports in-circuit serial programming (ICSP) via two pins (RB6/RB7), enabling field updates and end-of-line calibration without removing the device from the board.
Typical applications include appliance control (washing machines, microwave ovens), industrial sensor interfaces, automotive body electronics, security and access control panels, low-cost remote controls, and battery-powered instrumentation. The internal oscillator and on-chip EEPROM reduce BOM cost in space-constrained designs.
Design consideration: When migrating firmware between PIC16F627A and PIC16F628A/648A variants, verify the configuration word and address mapping because the larger-flash parts add memory-mapped registers at fixed offsets. Also note that the SOIC-18 footprint is 0.65 mm pin pitch - not compatible with the 2.54 mm DIP-18 footprint without PCB rework.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on a single manufacturer datasheet to accelerate sourcing and design decisions.
直接替换替代料： PIC16F627AT-I/SO ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC16F627AT-I/SO （相同外形与封装尺寸） ——差异在于 Package, Internal Oscillator, Core Architecture, Timers, Operating Temperature Range.
快速对比工具——选择替代料号进行并排对比：
PIC16F627A-I/SO
✅ 直接替换✓ 有现货
$1.74 / 个
查看数据手册 →PIC16F627AT-I/SS
✅ 直接替换✓ 有现货
$1.77 / 个
查看数据手册 →PIC16F627AT-E/SO
✅ 直接替换✓ 有现货
$1.18 / 个
查看数据手册 →PIC16F627T-04/SO
✅ 直接替换📋 参考替代料（不在目录中）
PIC16F628AT-I/SO
✅ 直接替换✓ 有现货
$1.92 / 个
查看数据手册 →PIC16F627AT-I/SO 最大额定值与电气特性
| Product Type | Microcontroller (MCU) |
| Core Architecture | PIC 8-bit RISC |
| Series | PIC 16F |
| Program Memory Size | 1.75 KB (1K x 14) Flash |
| RAM Size | 224 bytes |
| EEPROM Size | 128 bytes |
| Maximum CPU Frequency | 20 MHz |
| Instruction Cycle | 200 ns @ 20 MHz |
| Operating Voltage | 3.3 V to 5.5 V |
| Supply Voltage (per DigiKey snippet alternate rating) | 4.5 V to 5.5 V |
| 工作温度 | -40C to +85C (Industrial, "I") |
| Number of I/O Pins | 16 |
| Peripheral I/O | 11 (per digchips datasheet snippet) |
| 封装 | 18-pin SOIC (SO) |
| 安装类型 | Surface Mount |
| Internal Oscillator | 4 MHz RC (selectable) |
| Communication Interfaces | USART |
| Timers | 1 x 8-bit, 1 x 16-bit |
| PWM Channels | 1 (CCP) |
| Comparators | 2 (with programmable reference) |
| ADC | None |
| Program Memory Type | Flash (ICSP programmable) |
| Lead-Free / RoHS | Lead Free (per digchips snippet) |
| 湿敏等级（MSL） | 1 (Unlimited) |
| Packaging Form | Tape & Reel ("T" suffix) |
PIC16F627AT-I/SO 引脚配置
| 引脚 1 | RA7/OSC1/CLKIN — Port A bit 7 / oscillator input / external clock input |
| 引脚 2 | RA6/OSC2/CLKOUT — Port A bit 6 / oscillator output / clock output |
| 引脚 3 | RA5/MCLR/Vpp — Port A bit 5 / Master Clear (reset, active low) / programming voltage |
| 引脚 4 | RA4/AN4/T0CKI — Port A bit 4 / analog input 4 / Timer 0 clock input |
| 引脚 5 | RA3/AN3/C1OUT — Port A bit 3 / analog input 3 / Comparator 1 output |
| 引脚 6 | RA2/AN2/CVREF — Port A bit 2 / analog input 2 / Comparator voltage reference output |
| 引脚 7 | RA1/AN1/C2IN+ — Port A bit 1 / analog input 1 / Comparator 2 non-inverting input |
| 引脚 8 | RA0/AN0/C2IN- — Port A bit 0 / analog input 0 / Comparator 2 inverting input |
| 引脚 9 | RB7/T1OSI/PGD — Port B bit 7 / Timer 1 oscillator input / ICSP data |
| 引脚 10 | RB6/T1OSO/T1CKI/PGC — Port B bit 6 / Timer 1 oscillator output / T1 clock input / ICSP clock |
| 引脚 11 | RB5 — Port B bit 5 (digital I/O) |
| 引脚 12 | RB4 — Port B bit 4 (digital I/O) |
| 引脚 13 | RB3/CCP1 — Port B bit 3 / Capture/Compare/PWM 1 output |
| 引脚 14 | RB2/RX/DT — Port B bit 2 / USART RX / data line |
| 引脚 15 | RB1/TX/CK — Port B bit 1 / USART TX / clock line |
| 引脚 16 | RB0/INT — Port B bit 0 / external interrupt input |
| 引脚 17 | VSS — Ground reference |
| 引脚 18 | VDD — Positive supply voltage |
典型应用
PIC16F627AT-I/SO 适用于 6 应用s: Home Appliance Control, Industrial Sensor Interface, Security and Access Control Panels, Remote Control and RF Transmitter Nodes, Automotive Body Electronics, Battery-Powered Instrumentation.
Home Appliance Control
The PIC16F627AT-I/SO is well suited for white-goods and small-appliance controllers such as microwave ovens, washing machines, and dishwashers. Its 1.75 KB Flash, 224-byte RAM, and 16 I/O pins provide enough headroom for keypad scanning, relay sequencing, and LCD segment driving, while the two on-chip comparators can directly monitor zero-cross detection circuits. The nanoWatt low-power sleep modes (~100 nA typical) keep standby consumption negligible on Energy Star-rated appliances. Industrial -40C to +85C temperature grade covers kitchen and laundry environments. Most appliance firmware runs comfortably within 1.5 KB, leaving margin for calibration constants and customer-variant parameters stored in the 128-byte EEPROM.
推荐
Industrial Sensor Interface
For 4-20 mA loop sensors, thermistor bridges, and discrete limit switches, the PIC16F627AT-I/SO offers a low-cost signal-conditioning front end. The two analog comparators paired with the programmable voltage reference implement window-comparator and threshold-detect circuits without an external op-amp, while the USART drives RS-232 or RS-485 transceivers for PLC backplane communication. The 20 MHz CPU executes deterministic control loops at sub-millisecond rates. Operating from 3.0-5.5 V lets the part share 3.3 V sensor rails or 5 V backplane power, and the -40C to +85C industrial grade covers factory-floor enclosures. The internal 4 MHz oscillator eliminates an external crystal and the related EMI footprint, reducing BOM cost in high-volume sensor modules.
推荐
Security and Access Control Panels
Alarm panels, door access controllers, and keypad entry systems benefit from the PIC16F627AT-I/SO's combination of EEPROM-backed user codes, USART for central-station reporting, and high-current I/O capable of directly driving sirens and relay coils. The 128-byte EEPROM stores operator credentials and event logs across power cycles without an external memory chip. Two comparators support tamper-switch supervision and PIR sensor thresholding. With firmware typically below 1 KB for keypad debouncing and code verification, the 1.75 KB Flash provides plenty of room. The 18-SOIC package suits slim wall-mount enclosures, and the industrial temperature range maintains reliable operation in unheated vestibules.
推荐
Remote Control and RF Transmitter Nodes
Battery-powered RF remote controls for ceiling fans, garage doors, and motorized blinds leverage the PIC16F627AT-I/SO's nanoWatt sleep current under 100 nA to extend coin-cell life beyond a year. The internal 4 MHz oscillator wakes the CPU only when a button is pressed, executes the transmit-code routine from Flash, and returns to sleep in a few hundred microseconds. The 16 I/O pins scan a 4x4 keypad matrix without a diode matrix thanks to weak internal pull-ups on PORTB. With typical remote firmware under 512 bytes, the 1.75 KB Flash comfortably stores rolling-code security algorithms and customer-specific pairing data in EEPROM.
推荐
Automotive Body Electronics
For non-safety automotive subsystems such as interior lighting controllers, mirror-adjust modules, and seat-position memories, the PIC16F627AT-I/SO delivers PIC mid-range determinism in an 18-SOIC footprint. The CCP/PWM module generates dim curves for LED drivers, while the two comparators detect battery-voltage sag during cranking. Industrial -40C to +85C is acceptable for cabin-mounted modules, but for under-hood or AEC-Q100 mandated applications, designers should select a Q-graded variant or migrate to the PIC16F182x family. The 128-byte EEPROM is ideal for non-volatile seat-position or mirror presets without external memory, and the USART interfaces with LIN or CAN bus transceivers for body-network connectivity.
推荐
Battery-Powered Instrumentation
Handheld meters, data loggers, and portable test gear use the PIC16F627AT-I/SO for its combination of low sleep current, on-chip EEPROM for calibration constants, and USART for PC interface. The two analog comparators with programmable voltage reference allow direct battery-voltage monitoring and sensor-bridge thresholding without an ADC. The internal oscillator eliminates a power-hungry external crystal. Operating from 2xAA alkaline or a single Li-coin cell at 3.0 V minimum, the part draws under 100 nA in sleep, enabling multi-year shelf life. The 1.75 KB Flash supports menu-driven user interfaces, while the 128-byte EEPROM stores user-set parameters and last-measurement values across battery swaps.
推荐
推荐产品汇总
工程参考数据： PIC16F627AT-I/SO ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC16F627A-I/SO | PIC16F628AT-I/SO | PIC16F627AT-E/SO | PIC16F627T-04/SO |
|---|---|---|---|---|---|
| Package | 18-SOIC (SO) | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 1.75 KB | 1.75 KB | 3.5 KB | 1.75 KB | 1.75 KB |
| RAM Size | 224 bytes | 224 bytes | 224 bytes | 224 bytes | 72 bytes |
| EEPROM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| Max Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 4 MHz |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +85C |
| Packaging Form | Tape & Reel | Tube | Tape & Reel | Tape & Reel | Tape & Reel |
| Comparators | 2 | 2 | 2 | 2 | 2 |
关键差异点
- Tape & Reel packaging optimized for high-volume SMT lines （对比 PIC16F627A-I/SO)
- Industrial -40C to +85C temperature grade with 20 MHz operation （对比 PIC16F627T-04/SO)
- In-circuit serial programming (ICSP) and on-chip EEPROM （对比 PIC16F627T-04/SO (no EEPROM variant on legacy 627 family))
设计说明
Estimated: Power dissipation at maximum activity with 20 MHz clock, 5.5 V VDD, and all 16 outputs unloaded is approximately 11 mW (typical supply current ~2 mA @ 5 V). Adding decoupling - a 100 nF ceramic between VDD (pin 18) and VSS (pin 17) placed within 3 mm of the package - prevents logic glitches during CCP/PWM transitions. For battery applications, the nanoWatt Sleep mode drops IPD to ~100 nA typical, ideal for remote-control duty cycles that sleep >99% of the time.
Keep the ICSP footprint even on production boards. RB6 (PGC) and RB7 (PGD) are programming pins; route them to test pads or a 1x3 header (PGC, PGD, GND) so field firmware updates are possible without removing the part. Place the decoupling capacitor as close as possible to VDD/VSS, with a ground return via to the PCB ground plane. If using the internal RC oscillator, leave RA6/OSC2 and RA7/OSC1 disconnected or route them to test pads to allow external clock calibration during EMC characterization.
Do not exceed the absolute maximum ratings on MCLR/RA5: it is a Schmitt trigger input but must be tied to VDD through a 10 kohm resistor for normal operation (low enables reset). Driving MCLR below VSS (e.g., through a mis-wired ESD diode) can cause latch-up. Also, PIC16F627A code written for the legacy PIC16F84A requires updates to the configuration word and address mapping because the EEPROM data memory is mapped at a different address (0x2100 vs 0x2100 on F84A but with different SFR access). Always recompile against PIC16F627A include headers.
When using the USART at higher baud rates (e.g., 115200 baud at 20 MHz clock), keep BRGH=1 and verify the calculated SPBRG value against actual oscillator tolerance. The internal 4 MHz RC oscillator has a +/-1% accuracy after calibration, which limits maximum reliable baud rate. For reliable RS-485 communications over industrial cable lengths, use an external crystal or resonator and an external MAX485 or ISL3179 transceiver with proper 120 ohm termination. Adding a 100 ohm series resistor on RX/DT and TX/CK pins dampens ringing on long PCB traces.
合规信息
RoHS compliant and lead-free per Microchip product family compliance documentation and the digchips specifications summary ("LEAD FREE, PLASTIC"). Not AEC-Q100 qualified - choose PIC16F182x or other Q-graded parts for AEC-Q100 mandated automotive applications. Microchip discloses conflict-mineral compliance through its standard supplier declaration.