PIC16F627T-20I/SS
PIC16F627T-20I/SS - 8-bit 20MHz MCU, 1.75KB Flash, SSOP-20
The Microchip Technology PIC16F627T-20I/SS is a RISC-based 8-bit Flash microcontroller from the PIC16F62X family, operating at up to 20 MHz with 1.75 KB (1K x 14) of program memory and 224 bytes of RAM, housed in a 20-pin SSOP (shrink small outline) package. The "T" suffix denotes tape-and-reel packaging, "20" specifies the 20 MHz maximum clock, "I" indicates the industrial temperature range (-40C to +85C), and "/SS" denotes the SSOP-20 package.
What is an 8-bit Flash microcontroller? An 8-bit Flash microcontroller is a single-chip computer that integrates a CPU, non-volatile Flash program memory, RAM, and peripherals on one die. Flash memory enables in-circuit reprogramming, which differentiates Flash MCUs from older OTP (one-time-programmable) or ROM-only devices. Within the broader taxonomy, the PIC16F627 belongs to: microcontroller (MCU) -> 8-bit MCU -> Flash MCU -> PIC16 family -> PIC16F62X sub-family. These devices typically serve as cost-effective embedded controllers in appliances, sensors, and small consumer products.
The PIC16F627T-20I/SS delivers 16 programmable I/O pins with individual direction control, high-current sink/source capable of directly driving LEDs, two analog comparators with a programmable on-chip voltage reference, a 10-bit PWM module, and a USART for serial communication. Built-in reliability features include Power-on Reset (POR), Power-up Timer (PWRT), Oscillator Start-up Timer (OST), Brown-out Detect (BOD), and a Watchdog Timer (WDT) with its own dedicated on-chip RC oscillator for safe operation.
Architecturally, the PIC16F62X family uses a Harvard architecture that separates program and data buses, allowing simultaneous instruction fetch and data access. This, combined with a 14-bit instruction word and a single-cycle ALU, achieves near 1:1 MIPS-to-MHz efficiency. The supply voltage range of 2.0V to 5.5V supports both 3.3V and 5V system designs, with a maximum DC current of 25 mA per I/O pin.
Typical applications for the PIC16F627T-20I/SS include small appliance control, sensor signal conditioning, automotive interior accessories, security system panels, IR remote control transmitters, low-end consumer electronics, battery chargers, and LED lighting controllers. The combination of analog comparators, PWM, and USART makes it well-suited for closed-loop control tasks where a full DSP is unnecessary.
When designing with this MCU, choose the internal 4 MHz RC oscillator for cost-sensitive designs, or an external crystal for timing-critical serial communication. Decoupling capacitors (100 nF plus 10 uF) should be placed within 5 mm of the VDD pin. For in-system programming, the ICSP interface uses RB6 (clock) and RB7 (data) shared with general-purpose I/O.
This page synthesizes distributor pricing, same-brand drop-in alternatives from the PIC16F62X and PIC16F62XA families, and practical design notes not consolidated in the Microchip datasheet PDF. Engineering decisions across these parameters directly affect BOM cost, board space, and long-term firmware portability.
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