PIC17LC756AT-08I/L Equivalent & Substitute Parts

Part Overview

The PIC17LC756AT-08I/L is an 8-bit microcontroller from Microchip Technology's PIC® 17C series, featuring 32KB OTP program memory, 902 x 8 bytes of RAM, and 50 I/O pins in a 68-PLCC package. The device operates at 8MHz with integrated peripherals including PWM, watchdog timer, and brown-out detection across a 3V to 5.5V supply range.

This part is classified as obsolete. Locating equivalent or substitute components becomes necessary when original stock is depleted or when design flexibility allows for active-status alternatives that maintain functional and electrical compatibility.

Key Parameters

Parameter	Value
Core Processor	PIC
Core Size	8-Bit
Speed	8MHz
Program Memory Size	32KB (16K x 16)
Program Memory Type	OTP
RAM Size	902 x 8
Number of I/O	50
Voltage - Supply (Vcc/Vdd)	3V ~ 5.5V
Data Converters	A/D 12x10b
Connectivity	I2C, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
Oscillator Type	External
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	68-LCC (J-Lead)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the PIC17LC756AT-08I/L is determined by strict equivalence across the following critical parameters:

Core Processor Architecture: PIC processor family
Core Size: 8-Bit processing capability
Program Memory: 32KB OTP capacity
RAM Configuration: 902 x 8 byte organization
I/O Count: 50 pins minimum
Operating Voltage: 3V to 5.5V supply range
Package Type: 68-LCC (J-Lead) surface mount form factor
Connectivity Interfaces: I2C, SPI, UART/USART support
Peripheral Set: Brown-out detection, POR, PWM, WDT functionality
Compliance Standards: ROHS3 and REACH requirements

The PIC17LC756A-08I/L meets all these criteria and qualifies as a direct substitute.

Parameter Comparison

Parameter	PIC17LC756AT-08I/L	PIC17LC756A-08I/L
Manufacturer	Microchip Technology	Microchip Technology
Series	PIC® 17C	PIC® 17C
Core Processor	PIC	PIC
Core Size	8-Bit	8-Bit
Speed	8MHz	8MHz
Program Memory Size	32KB (16K x 16)	32KB (16K x 16)
Program Memory Type	OTP	OTP
RAM Size	902 x 8	902 x 8
Number of I/O	50	50
Voltage - Supply (Vcc/Vdd)	3V ~ 5.5V	3V ~ 5.5V
Data Converters	A/D 12x10b	A/D 12x10b
Connectivity	I2C, SPI, UART/USART	I2C, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT
Oscillator Type	External	External
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	68-LCC (J-Lead)	68-LCC (J-Lead)
Mounting Type	Surface Mount	Surface Mount
Supplier Device Package	68-PLCC (24.23x24.23)	68-PLCC (24.23x24.23)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)
REACH Status	REACH Unaffected	REACH Unaffected
Product Status	Obsolete	Active

Engineering Selection Recommendations

The PIC17LC756A-08I/L is the qualified substitute for the PIC17LC756AT-08I/L based on the following engineering criteria:

Functional Equivalence: Both parts share identical electrical specifications, memory architecture, I/O configuration, and peripheral functionality. No firmware or hardware redesign is required for substitution.

Compliance Alignment: Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility in production environments.

Product Status Advantage: The PIC17LC756A-08I/L carries active product status, providing superior long-term availability and supply chain reliability compared to the obsolete PIC17LC756AT-08I/L.

Package Compatibility: Identical 68-LCC (J-Lead) surface mount packaging and pinout ensure direct PCB compatibility without layout modifications.

Inventory Availability: The substitute part demonstrates higher current stock levels (923 pcs vs. 703 pcs), supporting immediate procurement requirements.

Frequently Asked Questions (FAQ)

Q: Can the PIC17LC756A-08I/L be used as a direct replacement for the PIC17LC756AT-08I/L?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters. No firmware modifications, hardware redesign, or PCB layout changes are required. The substitute part is pin-compatible and functionally equivalent.

Q: What is the primary difference between these two part numbers?

A: The PIC17LC756AT-08I/L is classified as obsolete, while the PIC17LC756A-08I/L maintains active product status. This distinction affects long-term availability and supply chain support. All electrical and mechanical specifications remain identical.

Q: Are there any packaging differences between these parts?

A: Both parts use the 68-LCC (J-Lead) surface mount package with identical dimensions (24.23x24.23mm). The main packaging difference is that the substitute is supplied in tube packaging, while the original part packaging is not specified. This does not affect electrical performance or PCB compatibility.

Q: What compliance certifications apply to both parts?

A: Both the PIC17LC756AT-08I/L and PIC17LC756A-08I/L are ROHS3 compliant and REACH unaffected. They meet the same environmental and regulatory standards for industrial and commercial applications.

Q: Can I use the PIC17LC756A-08I/L in applications originally designed for the PIC17LC756AT-08I/L?

A: Yes. The substitute part maintains identical voltage supply range (3V to 5.5V), operating temperature range (-40°C to 85°C), and all peripheral functionality. No application-level modifications are necessary.

Q: What is the moisture sensitivity level for these components?

A: Both parts carry MSL 3 rating with a 168-hour floor life. Standard moisture control procedures during storage and handling apply to both components equally.

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