PIC16C771T-E/SS Equivalent & Substitute Parts

Part Overview

The PIC16C771T-E/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, featuring 7KB OTP program memory, 256 x 8 RAM, and integrated peripherals including PWM, watchdog timer, and brown-out detection. The device operates at 20MHz with a 4V to 5.5V supply range and is housed in a 20-SSOP surface mount package.

The PIC16C771T-E/SS carries an Obsolete product status. Identifying equivalent and substitute parts is essential for system redesign, production continuity, and component sourcing in applications where this microcontroller is currently deployed.

Key Parameters

Parameter	Value
Core Processor	PIC
Core Size	8-Bit
Speed	20MHz
Program Memory Size	7KB (4K x 14)
Program Memory Type	OTP
RAM Size	256 x 8
Voltage - Supply (Vcc/Vdd)	4V ~ 5.5V
Data Converters	A/D 6x12b
Number of I/O	15
Connectivity	I2C, SPI
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
Mounting Type	Surface Mount
Package / Case	20-SSOP (0.209", 5.30mm Width)
Operating Temperature	-40°C ~ 125°C (TA)

Substitute Part Grouping Explanation

Substitution for the PIC16C771T-E/SS is determined by strict alignment of the following critical parameters:

Core Processor & Architecture: PIC 8-bit processor
Program Memory: 7KB (4K x 14) OTP
RAM Configuration: 256 x 8
Operating Speed: 20MHz
Supply Voltage Range: 4V ~ 5.5V
Peripheral Set: I2C, SPI, PWM, WDT, Brown-out Detect/Reset, POR
I/O Count: 15 pins
Data Converter: A/D 6x12b
Package: 20-SSOP surface mount

The identified substitute parts maintain identical electrical specifications and package footprint, ensuring direct functional equivalence. Variations in product status and operating temperature range are noted but do not affect core substitutability.

Parameter Comparison

Parameter	PIC16C771T-E/SS	PIC16C771-E/SS	PIC16C771-I/SS
Manufacturer	Microchip Technology	Microchip Technology	Microchip Technology
Series	PIC® 16C	PIC® 16C	PIC® 16C
Core Processor	PIC	PIC	PIC
Core Size	8-Bit	8-Bit	8-Bit
Speed	20MHz	20MHz	20MHz
Program Memory Size	7KB (4K x 14)	7KB (4K x 14)	7KB (4K x 14)
Program Memory Type	OTP	OTP	OTP
RAM Size	256 x 8	256 x 8	256 x 8
Voltage - Supply (Vcc/Vdd)	4V ~ 5.5V	4V ~ 5.5V	4V ~ 5.5V
Data Converters	A/D 6x12b	A/D 6x12b	A/D 6x12b
Number of I/O	15	15	15
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
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	20-SSOP (0.209", 5.30mm Width)	20-SSOP (0.209", 5.30mm Width)	20-SSOP (0.209", 5.30mm Width)
Operating Temperature	-40°C ~ 125°C (TA)	-40°C ~ 125°C (TA)	-40°C ~ 85°C (TA)
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

PIC16C771-E/SS is the primary substitute for the obsolete PIC16C771T-E/SS. Both parts share identical electrical specifications, memory configuration, and peripheral functionality. The PIC16C771-E/SS maintains Active product status with ROHS3 compliance and REACH unaffected certification, ensuring long-term availability and regulatory alignment.

PIC16C771-I/SS serves as an alternative substitute with identical core specifications. This variant operates within a narrower temperature range (-40°C to +85°C versus -40°C to +125°C) and is supplied in Tube packaging. Selection of this part is appropriate for applications where the reduced operating temperature ceiling does not conflict with system requirements.

Both substitute parts are ROHS3 compliant and REACH unaffected, maintaining the same regulatory compliance profile as the original device.

Frequently Asked Questions (FAQ)

Q: Can PIC16C771-E/SS directly replace PIC16C771T-E/SS in existing designs?

A: Yes. Both parts are electrically and mechanically identical, with matching pin configurations, memory specifications, and peripheral sets. The 20-SSOP package footprint is identical, enabling direct PCB-level substitution.

Q: What is the difference between PIC16C771-E/SS and PIC16C771-I/SS?

A: The primary difference is operating temperature range. PIC16C771-E/SS operates from -40°C to +125°C, while PIC16C771-I/SS operates from -40°C to +85°C. All other electrical and functional parameters are identical. Packaging differs, with PIC16C771-I/SS supplied in Tube format.

Q: Why is the original PIC16C771T-E/SS marked as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. Active substitutes (PIC16C771-E/SS and PIC16C771-I/SS) are available from Microchip Technology and authorized distributors.

Q: Are the substitute parts RoHS and REACH compliant?

A: Yes. Both PIC16C771-E/SS and PIC16C771-I/SS are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Does the 20-SSOP package remain the same across all variants?

A: Yes. All three parts use the 20-SSOP (0.209", 5.30mm Width) surface mount package, ensuring identical PCB footprint and assembly compatibility.

Q: Which substitute should I select for new designs?

A: PIC16C771-E/SS is recommended for new designs, as it maintains the full operating temperature range (-40°C to +125°C) and Active product status, ensuring long-term availability and support.

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