PIC16C773T-E/SS Equivalent & Substitute Parts

Part Overview

The PIC16C773T-E/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, designed for embedded applications requiring OTP (One-Time Programmable) memory. This device features 7KB program memory, 256 bytes of RAM, and integrated peripherals including PWM, watchdog timer, and brown-out detection. The part is classified as obsolete, which necessitates identification of active equivalent alternatives for ongoing design support and procurement.

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	22
Connectivity	I2C, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
Mounting Type	Surface Mount
Package	28-SSOP (0.209", 5.30mm Width)
Operating Temperature	-40°C ~ 125°C (TA)

Substitute Part Grouping Explanation

Substitution eligibility for the PIC16C773T-E/SS is determined by strict equivalence across the following critical parameters:

Core Architecture: PIC 8-bit processor
Memory Configuration: 7KB program memory (4K x 14), 256 x 8 RAM
Program Memory Type: OTP
Clock Speed: 20MHz maximum
I/O Count: 22 pins
Voltage Range: 4V ~ 5.5V supply
Peripheral Set: I2C, SPI, UART/USART, PWM, WDT, brown-out detection
Package: 28-SSOP form factor
Data Converter: A/D 6x12b

The identified substitute parts maintain identical electrical and functional specifications. Differences in product status (active vs. obsolete) and operating temperature ranges are noted but do not affect functional interchangeability within specified operating conditions.

Parameter Comparison

Parameter	PIC16C773T-E/SS (Main)	PIC16C773-E/SS (Substitute)	PIC16C773-I/SS (Substitute)
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	22	22	22
Connectivity	I2C, SPI, UART/USART	I2C, SPI, UART/USART	I2C, SPI, UART/USART
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	28-SSOP (0.209", 5.30mm Width)	28-SSOP (0.209", 5.30mm Width)	28-SSOP (0.209", 5.30mm Width)
Product Status	Obsolete	Active	Active
Operating Temperature	-40°C ~ 125°C (TA)	-40°C ~ 125°C (TA)	-40°C ~ 85°C (TA)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Both PIC16C773-E/SS and PIC16C773-I/SS are functionally equivalent to the obsolete PIC16C773T-E/SS across all electrical and mechanical parameters. Selection between active alternatives is based on the following criteria:

PIC16C773-E/SS: Maintains the full operating temperature range of -40°C to 125°C, matching the original part specification. This variant is suitable for applications requiring extended high-temperature operation.

PIC16C773-I/SS: Operates within the -40°C to 85°C temperature range, which is standard for industrial applications. This part offers higher inventory availability (6476 units) compared to PIC16C773-E/SS (843 units).

Both substitute parts carry ROHS3 compliance, REACH unaffected status, and MSL Level 1 rating, ensuring regulatory and environmental compatibility with the original design. Selection should be based on application temperature requirements and procurement lead time considerations.

Frequently Asked Questions (FAQ)

Q: Can PIC16C773-E/SS and PIC16C773-I/SS be used interchangeably with PIC16C773T-E/SS?

A: Yes, both parts are functionally equivalent. The primary difference is operating temperature range. PIC16C773-E/SS supports -40°C to 125°C, while PIC16C773-I/SS supports -40°C to 85°C. Selection depends on application temperature requirements.

Q: What is the significance of the temperature rating difference?

A: The temperature rating indicates the maximum ambient temperature at which the device maintains specified electrical characteristics. Applications operating above 85°C require the PIC16C773-E/SS variant. Standard industrial applications typically operate within the -40°C to 85°C range.

Q: Are the package dimensions identical across all three parts?

A: Yes. All three parts use the 28-SSOP package with identical dimensions (0.209" width, 5.30mm). PCB footprints and assembly processes are directly compatible.

Q: Do the substitute parts have the same memory configuration?

A: Yes. All three parts feature 7KB program memory (4K x 14), 256 x 8 RAM, and identical peripheral sets including I2C, SPI, UART/USART, PWM, watchdog timer, and brown-out detection.

Q: What is the inventory status for each part?

A: PIC16C773T-E/SS (obsolete): 778 units. PIC16C773-E/SS (active): 843 units. PIC16C773-I/SS (active): 6476 units. The active variants offer better long-term procurement availability.

Q: Are there any compliance or regulatory differences?

A: No. All three parts are ROHS3 compliant, REACH unaffected, and carry MSL Level 1 rating. Regulatory and environmental compliance is identical.

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