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Microchip Technology PIC16F688T-I/SL
- Part No.:
- PIC16F688T-I/SL
- Manufacturer:
- Microchip Technology
- Category:
- Microcontrollers
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
PIC16F688T-I/SL.pdf
- Description:
- IC MCU 8BIT 7KB FLASH 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:28,077
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Product details
Overview
PIC16F688T-I/SL from Microchip Technology is a 14-pin, flash-based 8-bit RISC microcontroller with nanoWatt technology, featuring 4 KB program memory, 256 bytes RAM, 256 bytes data EEPROM, 12 I/O pins, and integrated 10-bit ADC (8 channels), dual analog comparators, enhanced EUSART, and two timers (8-bit Timer0 + 16-bit Timer1). It operates from 2.0V–5.5V and supports ultra-low-power wake-up in battery-powered sensor interfaces.
For engineers reviewing the PIC16F688T-I/SL datasheet, PIC16F688T-I/SL pinout, PIC16F688T-I/SL application, or PIC16F688T-I/SL equivalent, key selection criteria include its factory-calibrated ±1% internal oscillator, 50 nA standby current at 2.0V, ICSP™ programming via two pins, and dual comparator module with programmable on-chip voltage reference - all critical for cost-sensitive, low-power embedded control designs.
Technical Context
The PIC16F688T-I/SL implements a high-performance RISC CPU with only 35 instructions, all single-cycle except branches, executing at up to 20 MHz (200 ns instruction cycle). Its architecture includes an 8-level hardware stack and direct/indirect/relative addressing modes.
Peripheral integration centers on mixed-signal capability: dual analog comparators with externally accessible inputs/outputs and software-configurable CVREF, 10-bit A/D converter with 8 selectable input channels, and enhanced EUSART supporting RS-232/RS-485/LIN 2.0 with auto-baud detect and wake-up on start bit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | 8-bit RISC CPU with 35-instruction set; all instructions execute in one cycle except branches - enables deterministic real-time control with minimal code footprint. |
| Memory | 4096-word Flash program memory, 256-byte SRAM, 256-byte data EEPROM - supports field firmware updates and nonvolatile parameter storage without external components. |
| Operating Voltage | 2.0V to 5.5V wide range - allows direct interface with 3.3V or 5V logic and operation from single-cell Li-ion or alkaline batteries. |
| Internal Oscillator | Factory-calibrated ±1% accuracy across 8 MHz to 125 kHz; software-tunable and supports two-speed start-up - eliminates need for external crystal in timing-critical but cost-sensitive applications. |
| Low-Power Performance | 50 nA typical standby current at 2.0V; 11 μA @ 32 kHz / 2.0V - enables multi-year battery life in remote sensors and IoT endpoints. |
| Analog Peripherals | Dual analog comparators with programmable on-chip voltage reference (CVREF); 10-bit ADC with 8 input channels - provides local signal conditioning and threshold detection without external op-amps or ADCs. |
| Communication | Enhanced USART supporting RS-232, RS-485, LIN 2.0/2.1, and J2602; auto-baud detect and wake-up on start bit - simplifies interoperability with legacy industrial buses and automotive networks. |
Pinout & Package
PIC16F688T-I/SL is packaged in 14-pin SOIC (Small Outline Integrated Circuit) with standard 1.27 mm pitch, RoHS-compliant, and rated for industrial temperature range (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RA0/AN0/C1IN+/ICSPDAT/ULPWU | Port A bit 0 / Analog channel 0 / Comparator 1 input / ICSP data / Ultra-low-power wake-up | Multi-function pin enabling analog sensing, serial programming, and sub-μA wake-up trigger - reduces BOM count in compact sensor nodes. |
| RA1/AN1/C1IN-/VREF/ICSPCLK | Port A bit 1 / Analog channel 1 / Comparator 1 input / External voltage reference / ICSP clock | Supports differential analog comparison and external A/D reference while sharing ICSP interface - simplifies layout for mixed-signal debugging. |
| RA2/AN2/T0CKI/INT/C1OUT | Port A bit 2 / Analog channel 2 / Timer0 clock input / External interrupt / Comparator 1 output | Combines analog input, edge-triggered interrupt, and timer gating - ideal for pulse-width measurement or zero-crossing detection. |
| RA3/MCLR/VPP | Port A bit 3 / Master Clear reset / Programming voltage | Configurable as digital input or active-low reset with internal pull-up - enables flexible reset strategy and eliminates external resistor in space-constrained designs. |
| RA4/AN3/T1G/OSC2/CLKOUT | Port A bit 4 / Analog channel 3 / Timer1 gate / Crystal output / Clock output | Provides gated timing control and clock distribution - supports synchronized sampling or external clock monitoring without additional logic. |
| RA5/T1CKI/OSC1/CLKIN | Port A bit 5 / Timer1 clock input / Crystal input / External clock input | Accepts crystal, ceramic resonator, or external clock source for Timer1 - enables precise timebase generation independent of system clock. |
| RC0–RC5 | Port C bits 0–5 / Analog channels 4–7 / Comparator 2 inputs/outputs / USART TX/RX | Full port multiplexing supports simultaneous analog acquisition, comparator feedback, and serial communication - maximizes peripheral concurrency in 14-pin footprint. |
| VDD, VSS | Power supply and ground | Single-supply operation with dedicated power/ground pins ensures stable analog and digital domains - critical for noise-immune ADC performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power nanoWatt technology | 50 nA standby current at 2.0V enables >10-year battery life in coin-cell-powered devices such as smoke detectors or environmental monitors. |
| Factory-calibrated internal oscillator | ±1% accuracy over voltage and temperature eliminates external crystal for UART communication and timing-critical control loops. |
| Integrated analog peripherals | Dual comparators with programmable CVREF and 10-bit 8-channel ADC reduce external component count by up to 5 parts in sensor front-end designs. |
| In-Circuit Serial Programming™ (ICSP™) | Two-pin programming (ICSPDAT/ICSPCLK) allows firmware updates in-system without socket removal - lowers manufacturing and field service costs. |
| Enhanced EUSART with LIN support | Auto-baud detect and LIN 2.0/2.1 compliance enable seamless integration into automotive body electronics and industrial control networks. |
Applications
| Smart Thermostat Sensor Node | Industrial Motor Control Interface |
|---|---|
|
Use Scenario: Local temperature/humidity sensing with wireless transmission in HVAC systems. IC Role / Device Role / Timing Role: Primary controller managing ADC sampling, comparator-based threshold alerts, and EUSART communication to gateway. Use Value: Internal ±1% oscillator ensures reliable UART timing without crystal; 50 nA sleep current extends battery life beyond 5 years. |
Use Scenario: Monitoring motor status (voltage, current, temperature) and driving indicator LEDs in pump/fan controllers. IC Role / Device Role / Timing Role: Embedded monitor handling analog inputs, PWM-less LED drive via high-current I/O, and fault reporting via RS-485. Use Value: 12 I/O pins with individual direction control and high-current sink/source eliminate external drivers; dual comparators detect overcurrent events in <1 μs. |
| Portable Medical Glucose Meter | Home Appliance Power Management Unit |
|
Use Scenario: Battery-powered handheld device measuring blood glucose via electrochemical sensor and displaying results. IC Role / Device Role / Timing Role: Signal conditioner and system manager acquiring analog sensor output, managing EEPROM calibration data, and controlling LCD backlight. Use Value: On-chip 10-bit ADC with 8 channels digitizes sensor, reference, and battery voltage simultaneously; 256-byte EEPROM stores patient-specific calibration coefficients. |
Use Scenario: Energy-efficient control of heating elements, fans, and user interface in microwave ovens or coffee makers. IC Role / Device Role / Timing Role: Main MCU executing safety interlocks, thermal monitoring via analog inputs, and user input scanning via interrupt-on-change pins. Use Value: Ultra-low-power wake-up (ULPWU) on RA0 enables instant response to door-open events; Brown-out Reset (BOR) prevents erratic behavior during AC line sags. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PIC16F685-I/SL | Same pinout and core, but lacks EUSART and has only 1 comparator; 1024-word Flash, no CVREF module. | Suitable for simpler analog monitoring where serial communication is handled externally. | Select when UART/LIN functionality is unnecessary and BOM cost reduction is prioritized over peripheral flexibility. |
| PIC16F1503-I/SL | Enhanced mid-range core with 3.5 KB Flash, 256-byte RAM, 128-byte EEPROM; adds CLC (Configurable Logic Cell) and CWG (Complementary Waveform Generator). | Better suited for digitally enhanced analog control (e.g., PWM-driven sensor excitation) but requires different toolchain and code migration. | Choose for new designs requiring advanced waveform generation or logic reconfiguration - not drop-in compatible due to peripheral register differences. |
Compared with PIC16F685-I/SL, PIC16F688T-I/SL delivers full EUSART and dual comparators at identical pin count; versus PIC16F1503-I/SL, it offers proven stability and lower toolchain overhead for legacy-compatible, cost-optimized embedded control.
Availability
PIC16F688T-I/SL is available at Aetrix Electronics and suitable for smart thermostat sensor nodes, industrial motor control interfaces, portable medical glucose meters, home appliance power management units, and battery-backed security sensors requiring stable component supply and long-term lifecycle support.
Supply support for PIC16F688T-I/SL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology Inc. is a leading provider of microcontrollers, analog, FPGA, and connectivity solutions, headquartered in Chandler, Arizona, with ISO/TS-16949:2002 certified design and wafer fabrication facilities.
The PIC16F688 product line targets cost-sensitive, ultra-low-power embedded control applications - emphasizing integrated analog peripherals, robust code protection, and simplified development for industrial, consumer, and medical end equipment.
FAQ
What is the maximum operating frequency of the PIC16F688T-I/SL?
The PIC16F688T-I/SL supports DC to 20 MHz oscillator/clock input, delivering a 200 ns instruction cycle time. Its internal oscillator is factory-calibrated to ±1% and software-selectable across 8 MHz to 125 kHz, enabling precise timing without external crystals in most applications. The PIC16F688T-I/SL maintains full functionality across this entire range under specified voltage and temperature conditions.
Does the PIC16F688T-I/SL support in-circuit programming?
Yes, the PIC16F688T-I/SL supports In-Circuit Serial Programming™ (ICSP™) using two dedicated pins: ICSPDAT (RA0) and ICSPCLK (RA1). This allows firmware updates without removing the device from the PCB, reducing manufacturing and field service complexity. The PIC16F688T-I/SL requires no high-voltage programming circuitry beyond the standard 13V VPP applied to RA3/MCLR during programming mode.
How many analog-to-digital converter channels does the PIC16F688T-I/SL have?
The PIC16F688T-I/SL integrates a 10-bit analog-to-digital converter with eight input channels (AN0–AN7), mapped across PORTA and PORTC pins. All channels share a common reference that can be selected as VDD, VSS, or the programmable on-chip CVREF voltage. The PIC16F688T-I/SL supports left- or right-justified result formatting and automatic channel sequencing for efficient multi-sensor polling.
What is the standby current specification for the PIC16F688T-I/SL?
The PIC16F688T-I/SL achieves a typical standby current of 50 nA at 2.0V and 25°C in Sleep mode with Watchdog Timer disabled and all peripherals off. This ultra-low quiescent current enables multi-year operation from primary lithium or alkaline cells in always-on sensor applications. The PIC16F688T-I/SL maintains this performance across its full industrial temperature range (–40°C to +85°C).
Can the PIC16F688T-I/SL operate from a single 3.3V supply?
Yes, the PIC16F688T-I/SL operates across a wide voltage range of 2.0V to 5.5V, making it fully compatible with standard 3.3V logic systems. At 3.3V, it delivers 220 μA typical operating current at 4 MHz and retains full functionality of its 10-bit ADC, dual comparators, EUSART, and nanoWatt sleep modes. The PIC16F688T-I/SL requires no level-shifting when interfacing with 3.3V peripherals.
PIC16F688T-I/SL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Series:
- PIC® 16F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Verified
- Core Processor:
- PIC
- Core Size:
- 8-Bit
- Speed:
- 20MHz
- Connectivity:
- UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, WDT
- Number of I/O:
- 12
- Program Memory Size:
- 7KB (4K x 14)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 256 x 8
- RAM Size:
- 256 x 8
- Voltage - Supply (Vcc/Vdd):
- 2V ~ 5.5V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
PIC16F688T-I/SL FAQ
1.How can I place an order for PIC16F688T-I/SL through Aetrix?
Please submit a Request for Quotation (RFQ) for PIC16F688T-I/SL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for PIC16F688T-I/SL reliable?
The price and inventory of PIC16F688T-I/SL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PIC16F688T-I/SL is usually 5 days.
3.What payment methods are accepted for PIC16F688T-I/SL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PIC16F688T-I/SL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PIC16F688T-I/SL?
PIC16F688T-I/SL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PIC16F688T-I/SL order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for PIC16F688T-I/SL?
For technical support, including PIC16F688T-I/SL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PIC16F688T-I/SL requirements.
6.How does Aetrix verify that PIC16F688T-I/SL is sourced from the original manufacturer or authorized distributors?
All PIC16F688T-I/SL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PIC16F688T-I/SL meets industry standards.
7.What is the process for return or replacement of PIC16F688T-I/SL?
All PIC16F688T-I/SL units undergo pre-shipment inspection (PSI). If there is an issue with PIC16F688T-I/SL, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The PIC16F688T-I/SL part is unused and in its original packaging.
Return procedure for PIC16F688T-I/SL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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