PIC16F688T-E/ST Equivalent & Substitute Parts

Part Overview

The PIC16F688T-E/ST is an 8-bit microcontroller from Microchip Technology's PIC® 16F series, designed for embedded applications requiring compact form factor and low-power operation. This device features 7KB of FLASH program memory, 256 bytes of EEPROM, and 256 bytes of RAM, with integrated UART/USART connectivity and analog-to-digital conversion capabilities. The part is currently in active production status with verified programmability through DiGi-Electronics. Substitute parts are identified based on identical electrical specifications, memory configurations, and packaging standards to ensure direct functional compatibility in existing designs.

Key Parameters

Parameter	Specification
Core Processor	PIC
Core Size	8-Bit
Speed	20MHz
Program Memory Size	7KB (4K x 14)
Program Memory Type	FLASH
EEPROM Size	256 x 8
RAM Size	256 x 8
Number of I/O	12
Voltage Supply (Vcc/Vdd)	2V ~ 5.5V
Data Converters	A/D 8x10b
Connectivity	UART/USART
Peripherals	Brown-out Detect/Reset, POR, WDT
Oscillator Type	Internal
Operating Temperature	-40°C ~ 125°C (TA)
Mounting Type	Surface Mount
Package / Case	14-TSSOP (0.173", 4.40mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the PIC16F688T-E/ST are identified based on strict equivalence across all critical electrical and mechanical parameters. The substitution logic is based on the following key criteria:

Electrical Equivalence: Identical core processor architecture (PIC), core size (8-Bit), operating speed (20MHz), memory configuration (7KB FLASH, 256x8 EEPROM, 256x8 RAM), I/O count (12), voltage supply range (2V ~ 5.5V), data converter specifications (A/D 8x10b), connectivity (UART/USART), and peripheral features (Brown-out Detect/Reset, POR, WDT).

Mechanical Compatibility: Identical mounting type (Surface Mount), package designation (14-TSSOP), and physical dimensions (0.173", 4.40mm Width).

Compliance & Status: Active product status, ROHS3 compliance, MSL Level 1, and verified programmability through DiGi-Electronics.

Packaging Variation: The primary difference between the main part and substitute is the supplier packaging format (Cut Tape & Digi-Reel® versus Tube), which does not affect electrical or mechanical compatibility.

Parameter Comparison

Parameter	PIC16F688T-E/ST (Main)	PIC16F688-E/ST (Substitute)
Manufacturer	Microchip Technology	Microchip Technology
Series	PIC® 16F	PIC® 16F
Core Processor	PIC	PIC
Core Size	8-Bit	8-Bit
Speed	20MHz	20MHz
Program Memory Size	7KB (4K x 14)	7KB (4K x 14)
Program Memory Type	FLASH	FLASH
EEPROM Size	256 x 8	256 x 8
RAM Size	256 x 8	256 x 8
Number of I/O	12	12
Voltage Supply (Vcc/Vdd)	2V ~ 5.5V	2V ~ 5.5V
Data Converters	A/D 8x10b	A/D 8x10b
Connectivity	UART/USART	UART/USART
Peripherals	Brown-out Detect/Reset, POR, WDT	Brown-out Detect/Reset, POR, WDT
Oscillator Type	Internal	Internal
Operating Temperature	-40°C ~ 125°C (TA)	-40°C ~ 125°C (TA)
Mounting Type	Surface Mount	Surface Mount
Package / Case	14-TSSOP (0.173", 4.40mm Width)	14-TSSOP (0.173", 4.40mm Width)
Supplier Device Package	14-TSSOP	14-TSSOP
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active
Packaging Format	Cut Tape (CT) & Digi-Reel®	Tube

Engineering Selection Recommendations

Both the PIC16F688T-E/ST and PIC16F688-E/ST are active production devices from Microchip Technology with identical electrical and mechanical specifications. Selection between these parts should be based on packaging and supply chain requirements:

PIC16F688T-E/ST is supplied in Cut Tape (CT) and Digi-Reel® format, suitable for high-volume automated assembly operations and reel-based pick-and-place systems.

PIC16F688-E/ST is supplied in Tube packaging, suitable for lower-volume applications, manual assembly, or situations where reel-based packaging is not required.

Both parts maintain ROHS3 compliance, MSL Level 1 rating, and verified programmability. The choice between these substitutes does not impact circuit design, firmware compatibility, or functional performance.

Frequently Asked Questions (FAQ)

Q: Are PIC16F688T-E/ST and PIC16F688-E/ST electrically identical?

A: Yes. Both parts share identical core processor architecture, memory configuration (7KB FLASH, 256x8 EEPROM, 256x8 RAM), I/O count (12), operating speed (20MHz), voltage supply range (2V ~ 5.5V), and peripheral features. No circuit modifications are required when substituting between these parts.

Q: What is the difference between Cut Tape/Digi-Reel® and Tube packaging?

A: Cut Tape and Digi-Reel® packaging formats are designed for automated assembly systems using reel-based pick-and-place equipment. Tube packaging is used for manual handling and lower-volume applications. The electrical and mechanical specifications of the microcontroller remain unchanged regardless of packaging format.

Q: Can I use PIC16F688-E/ST as a direct replacement for PIC16F688T-E/ST in existing designs?

A: Yes. The PIC16F688-E/ST is a direct substitute with no design modifications required. Both parts are pin-compatible, functionally equivalent, and operate under identical electrical conditions. Firmware and PCB layouts require no changes.

Q: Are both parts RoHS compliant?

A: Yes. Both PIC16F688T-E/ST and PIC16F688-E/ST are ROHS3 compliant and carry MSL Level 1 rating, indicating unlimited shelf life under controlled storage conditions.

Q: What is the operating temperature range for these microcontrollers?

A: Both parts operate across the industrial temperature range of -40°C to 125°C (TA), suitable for embedded applications in automotive, industrial, and consumer electronics environments.

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