PIC16C72AT-04E/SS Equivalent & Substitute Parts

Part Overview

The PIC16C72AT-04E/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, featuring 4.6KB OTP program memory, 128 bytes of RAM, and integrated peripherals including PWM, watchdog timer, and brown-out detection. The device operates at 4MHz with a 28-SSOP surface mount package and supports I2C and SPI connectivity.

This part carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support legacy system maintenance and production requirements.

Key Parameters

Parameter	Value
Manufacturer	Microchip Technology
Core Processor	PIC
Core Size	8-Bit
Speed	4MHz
Program Memory Size	4.6KB (2K x 14)
Program Memory Type	OTP
RAM Size	128 x 8
Number of I/O	22
Voltage Supply (Vcc/Vdd)	4V ~ 5.5V
Data Converters	A/D 5x8b
Connectivity	I2C, SPI
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
Operating Temperature	-40°C ~ 125°C (TA)
Mounting Type	Surface Mount
Package / Case	28-SSOP (0.209", 5.30mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the PIC16C72AT-04E/SS is determined by strict equivalence across the following critical parameters:

Core Architecture & Memory: 8-bit PIC processor with 4.6KB OTP program memory and 128 x 8 RAM
Operational Specifications: 4MHz clock speed, 4V ~ 5.5V supply voltage range
Peripheral Feature Set: I2C, SPI connectivity; PWM, WDT, brown-out detection, POR
I/O Configuration: 22 I/O pins
Package Specification: 28-SSOP surface mount package with identical physical dimensions
Compliance & Certifications: ROHS3 compliance, MSL Level 1, REACH unaffected status

The identified substitute parts maintain full electrical and mechanical compatibility with the original part number while offering improved product status and availability.

Parameter Comparison

Parameter	PIC16C72AT-04E/SS	PIC16C72A-04E/SS	PIC16C72A-04I/SS
Manufacturer	Microchip Technology	Microchip Technology	Microchip Technology
Product Status	Obsolete	Active	Active
Core Size	8-Bit	8-Bit	8-Bit
Speed	4MHz	4MHz	4MHz
Program Memory Size	4.6KB (2K x 14)	4.6KB (2K x 14)	4.6KB (2K x 14)
Program Memory Type	OTP	OTP	OTP
RAM Size	128 x 8	128 x 8	128 x 8
Number of I/O	22	22	22
Voltage Supply (Vcc/Vdd)	4V ~ 5.5V	4V ~ 5.5V	4V ~ 5.5V
Data Converters	A/D 5x8b	A/D 5x8b	A/D 5x8b
Connectivity	I2C, SPI	I2C, SPI	I2C, SPI
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT
Operating Temperature	-40°C ~ 125°C (TA)	-40°C ~ 125°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	28-SSOP (0.209", 5.30mm Width)	28-SSOP (0.209", 5.30mm Width)	28-SSOP (0.209", 5.30mm Width)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

PIC16C72A-04E/SS is the primary substitute for the obsolete PIC16C72AT-04E/SS. Both parts maintain identical electrical specifications, memory configuration, and peripheral functionality. The PIC16C72A-04E/SS carries Active product status, ensuring ongoing availability and supply chain support. This part is ROHS3 compliant and carries verified programmability certification.

PIC16C72A-04I/SS serves as an alternative substitute with the same core functionality and electrical specifications. This variant differs in operating temperature range (-40°C ~ 85°C versus -40°C ~ 125°C) and packaging format (Tube). Selection of this part is appropriate for applications where the reduced temperature range is acceptable and tube packaging meets procurement requirements.

Both substitute parts are manufactured by Microchip Technology and maintain full pin-for-pin and functional compatibility with the original part number. Selection between PIC16C72A-04E/SS and PIC16C72A-04I/SS depends on specific temperature operating requirements and packaging preferences.

Frequently Asked Questions (FAQ)

Q: Are PIC16C72A-04E/SS and PIC16C72A-04I/SS pin-for-pin compatible with PIC16C72AT-04E/SS?

A: Yes. All three parts share identical 28-SSOP package specifications with 22 I/O pins in the same physical configuration. Pin assignments and electrical characteristics are equivalent across all three part numbers.

Q: What is the primary difference between PIC16C72A-04E/SS and PIC16C72A-04I/SS?

A: The primary differences are operating temperature range and packaging format. PIC16C72A-04E/SS operates from -40°C to 125°C, while PIC16C72A-04I/SS operates from -40°C to 85°C. Additionally, PIC16C72A-04I/SS is supplied in Tube packaging, whereas PIC16C72A-04E/SS packaging is not specified.

Q: Can I use PIC16C72A-04I/SS in an application requiring -40°C to 125°C operation?

A: No. PIC16C72A-04I/SS is rated only to 85°C maximum operating temperature. For applications requiring the full -40°C to 125°C range, PIC16C72A-04E/SS is the appropriate selection.

Q: Are both substitute parts ROHS3 compliant?

A: Yes. Both PIC16C72A-04E/SS and PIC16C72A-04I/SS are ROHS3 compliant with MSL Level 1 moisture sensitivity rating and REACH unaffected status.

Q: What is the significance of the "A" designation in PIC16C72A part numbers?

A: The "A" designation indicates an improved version of the base PIC16C72 architecture. Both PIC16C72A variants are Active products with verified programmability, whereas the original PIC16C72AT-04E/SS carries Obsolete status.

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