PIC16F627T-20I/SS - 8-bit 20MHz MCU, 1.75KB Flash, SSOP-20
MPN: PIC16F627T-20I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.95 | $2.95 |
| 10 | $2.66 | $26.60 |
| 100 | $2.36 | $236.00 |
| 500 | $2.07 | $1,035.00 |
| 1,000 | $1.77 | $1,770.00 |
PIC16F627T-20I/SS Overview
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.
Drop-in alternatives for PIC16F627T-20I/SS — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC16F627T-20I/SS (same form factor and footprint) — differing in Package, RoHS Status, Core, Instruction Set, Internal Oscillator.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F627-20I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F628T-20I/SS
✅ Drop-In✓ In Stock
$1.78 / Unit
View Datasheet →PIC16F648AT-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F627AT-I/SS
✅ Drop-In✓ In Stock
$1.77 / Unit
View Datasheet →PIC16F627T-04I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F627T-20I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC Harvard |
| Instruction Set | 14-bit RISC (PIC16) |
| Family | PIC16F62X |
| Program Memory (Flash) | 1.75 KB (1K x 14 words) |
| RAM | 224 bytes |
| EEPROM | 128 bytes |
| Maximum CPU Frequency | 20 MHz |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| I/O Pins | 16 |
| Analog Comparators | 2 with programmable VREF |
| PWM Channels | 1 (10-bit) |
| USART | 1 (Enhanced) |
| Timers | 3 (TMR0, TMR1 16-bit, TMR2 8-bit) |
| Watchdog Timer (WDT) | Yes, dedicated RC oscillator |
| Brown-out Detect (BOD) | Yes |
| In-Circuit Serial Programming (ICSP) | Yes (RB6/RB7) |
| Package | SSOP-20 (5.30 mm body) |
| Mounting Type | Surface Mount |
| Operating Temperature (I grade) | -40C to +85C |
| MSL Level | 1 (unlimited floor life) |
| RoHS Status | Compliant |
| Lead Finish | Matte Tin (Pb-free) |
PIC16F627T-20I/SS Pin Configuration
| Pin 1 | RA7/OSC1/CLKIN — Bidirectional I/O / oscillator input / external clock input |
| Pin 2 | RA6/OSC2/CLKOUT — Bidirectional I/O / oscillator output / clock output |
| Pin 3 | RA5/MCLR/VPP — Bidirectional I/O / Master Clear (reset, active low) / programming voltage |
| Pin 4 | RA4/AN4/TOCKI — Bidirectional I/O / analog input 4 / Timer 0 clock input |
| Pin 5 | RA3/AN3/VREF+ — Bidirectional I/O / analog input 3 / VREF positive |
| Pin 6 | RA2/AN2/VREF- — Bidirectional I/O / analog input 2 / VREF negative |
| Pin 7 | RA1/AN1/C1OUT — Bidirectional I/O / analog input 1 / comparator 1 output |
| Pin 8 | RA0/AN0 — Bidirectional I/O / analog input 0 |
| Pin 9 | RB7/T1OSI/PGD — Bidirectional I/O / Timer 1 oscillator input / ICSP data |
| Pin 10 | RB6/T1OSO/T1CKI/PGC — Bidirectional I/O / Timer 1 oscillator output / Timer 1 clock / ICSP clock |
| Pin 11 | RB5 — Bidirectional I/O |
| Pin 12 | RB4 — Bidirectional I/O |
| Pin 13 | RB3/CCP1 — Bidirectional I/O / CCP1 PWM output |
| Pin 14 | RB2 — Bidirectional I/O |
| Pin 15 | RB1/RX/DT — Bidirectional I/O / USART RX / sync data |
| Pin 16 | RB0/TX/CK — Bidirectional I/O / USART TX / sync clock |
| Pin 17 | VDD — Positive supply voltage (2.0V to 5.5V) |
| Pin 18 | GND — Ground reference |
| Pin 19 | RA7 (Note: see datasheet) — Refer to datasheet for SSOP-20 pin 19/20 (per Microchip DS40044G) |
| Pin 20 | RA6 (Note: see datasheet) — Refer to datasheet for SSOP-20 pin 20 (per Microchip DS40044G) |
Typical Applications
PIC16F627T-20I/SS is suitable for 7 applications: Small Appliance Control, Sensor Signal Conditioning, Automotive Interior Accessories, Security System Panels, IR Remote Control Transmitter, LED Lighting Controller, Battery Charger Controller.
Small Appliance Control
The PIC16F627T-20I/SS fits small appliance control boards because its 16 I/O pins can drive relays, triacs, and indicator LEDs while the two analog comparators with programmable VREF sense temperature or voltage thresholds. Operating from 2.0V to 5.5V, it accepts both 3.3V and 5V rails typical of appliance power supplies, and the 1.75 KB Flash holds state-machine firmware for toasters, coffee makers, and rice cookers. Estimated firmware footprint for typical appliance code is 600 to 1,200 words, leaving margin for in-field updates.
Recommended
Sensor Signal Conditioning
Engineers use the PIC16F627T-20I/SS in sensor conditioning modules because its two on-chip comparators with programmable on-chip voltage reference provide threshold detection for analog sensors without external op-amps. The 10-bit PWM can synthesize excitation signals for resistive bridges, while the USART streams processed data to a host controller. Operating at 20 MHz gives 5 MIPS, sufficient for moving-average filtering and linearization in 100 Hz to 1 kHz sensor bandwidths at low BOM cost.
Recommended
Automotive Interior Accessories
The PIC16F627T-20I/SS is well-suited for non-safety automotive interior accessories such as ambient lighting controllers, mirror adjusters, and seat memory switches. Its industrial -40C to +85C temperature range covers cabin environments, and the 16 high-current I/O pins source/sink 25 mA per pin for direct LED drive without driver transistors. The built-in Brown-out Detect (BOD) and Watchdog Timer (WDT) provide the supervisory functions expected in vehicle electronics, while the SSOP-20 footprint suits tight PCB enclosures.
Recommended
Security System Panels
Security alarm panels deploy the PIC16F627T-20I/SS for zone monitoring, keypad scan, and siren driver control. The 16 I/Os handle up to 8 zones plus a 4x4 keypad matrix with minimal external logic, and the Enhanced USART interfaces to a cellular or PSTN dialer module. The 128-byte EEPROM stores user codes and event logs across power cycles, while 1.75 KB Flash holds the alarm state machine. Watchdog Timer with dedicated RC oscillator ensures the panel recovers from firmware faults.
Recommended
IR Remote Control Transmitter
Battery-powered IR remote controls benefit from the PIC16F627T-20I/SS because its 2.0V to 5.5V supply range supports 2x AA cells directly, while sleep current in the microamp range extends battery life to multi-year levels. The 10-bit PWM generates accurate 38 kHz or 56 kHz carrier frequencies for RC5/RC6 or NEC protocols, and the 1.75 KB Flash is ample for protocol stacks plus button scanning. The 16 I/Os accept matrix keypads up to 4x4 = 16 keys without external decoder.
Recommended
LED Lighting Controller
The PIC16F627T-20I/SS drives LED lighting controllers with high-current 25 mA I/O pins capable of direct LED connection (small indicator strings) plus the 10-bit PWM for dimming. Its 20 MHz clock supports 8-bit dimming resolution at 1 kHz refresh rate without flicker, and the analog comparators sense supply current for over-current protection. Industrial temperature range -40C to +85C covers indoor and outdoor luminaires, while 1.75 KB Flash holds color-mixing algorithms for RGB fixtures.
Recommended
Battery Charger Controller
The PIC16F627T-20I/SS serves as a low-cost charger controller for NiMH, Li-ion, and lead-acid packs because the on-chip comparators with programmable VREF implement CC/CV charge termination without external analog ICs. The 10-bit PWM drives a buck or linear pass element with adjustable duty cycle, and the 128-byte EEPROM stores charge profile parameters across power cycles. Operating from 2.0V to 5.5V covers USB and adapter inputs commonly used in consumer chargers.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F627T-20I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F627-20I/SS | PIC16F628T-20I/SS | PIC16F648AT-I/SS | PIC16F627AT-I/SS | PIC16F627T-04I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SSOP-20 | SSOP-20 - same | SSOP-20 - same | SSOP-20 - same | SSOP-20 - same | SSOP-20 - same |
| Program Memory (Flash) | 1.75 KB (1K x 14) | 1.75 KB (1K x 14) | 3.5 KB (2K x 14) | 7 KB (4K x 14) | 1.75 KB (1K x 14) | 1.75 KB (1K x 14) |
| RAM | 224 bytes | 224 bytes | 224 bytes | 256 bytes | 224 bytes | 224 bytes |
| EEPROM | 128 bytes | 128 bytes | 128 bytes | 256 bytes | 128 bytes | 128 bytes |
| Max CPU Clock | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 4 MHz |
| Supply Voltage | 2.0V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V |
| I/O Pins | 16 | 16 | 16 | 16 | 16 | 16 |
| Analog Comparators | 2 with VREF | 2 with VREF | 2 with VREF | 2 with VREF | 2 with VREF | 2 with VREF |
| Temperature Range | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) |
Key Differentiators
- Tape-and-reel factory packaging (vs PIC16F627-20I/SS)
- Smallest Flash in the SSOP-20 PIC16F62X family (vs PIC16F628T-20I/SS)
- Lower-voltage operation down to 2.0V (vs PIC16F627T-04I/SS)
- Family pin-compatibility across Flash sizes (vs PIC16F648AT-I/SS)
Design Notes
Place a 100 nF ceramic decoupling capacitor within 5 mm of the VDD pin (pin 17) and a 10 uF bulk capacitor nearby to suppress switching transients. The PIC16F627T-20I/SS draws up to ~25 mA active at 20 MHz with all I/Os switching; use a low-ESR LDO such as MCP1700 for noise-sensitive analog designs. The internal Brown-out Detect (BOD) holds reset when VDD falls below the configured threshold, but always size bulk capacitance so VDD rise time is monotonic at power-up - otherwise the Power-up Timer (PWRT) may not complete correctly.
For the SSOP-20 footprint, use 0.65 mm pitch pads with 1.0 mm width and expose thermal reliefs on ground vias to ease rework. Keep the ICSP pins RB6 (PGC) and RB7 (PGD) accessible on test points so the device can be re-programmed after PCB assembly. The MCLR/VPP pin (pin 3) should pull up to VDD through a 10 kohm resistor with the decoupling cap placed close to the pin; do not leave MCLR floating or the device will experience spurious resets.
Do not assume 5V-only operation - the PIC16F627T-20I/SS supports 2.0V to 5.5V, so verify analog comparator thresholds and ADC references (where applicable) at the actual VDD rail. Configuration bits set oscillator mode, watchdog, BOD, and code protection; once programmed, CKD bits are locked. Always read the configuration word back after programming to confirm. For serial communications via the Enhanced USART, ensure baud-rate error is under 2.5 percent by selecting an appropriate SPBRG value for the system Fosc.
The PIC16F627T-20I/SS has 25 mA source/sink capability per I/O pin - enough to drive LEDs directly but not relays or solenoids, which require driver transistors or MOSFETs. Add flyback diodes across inductive loads to protect I/O pins from kickback. For PWM-driven loads, route the PWM trace (RB3/CCP1) away from analog comparator inputs to minimize crosstalk; ground planes under the SSOP-20 footprint improve both thermal dissipation and signal integrity at 20 MHz.
Compliance Information
RoHS compliant per Microchip product page and distributor listings (DigiKey, Mouser). Industrial temperature grade -40C to +85C; not AEC-Q100 qualified - choose PIC16F88 or PIC16F1827 family for automotive applications requiring AEC-Q100.
