PIC16C770-E/SS Equivalent & Substitute Parts

Part Overview

The PIC16C770-E/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, featuring 4.6KB OTP (One-Time Programmable) memory, 20MHz operation, and integrated peripherals including PWM, watchdog timer, and brown-out detection. The device is currently active in production with verified programmability status and maintains full RoHS3 compliance.

Substitute parts are identified when design requirements permit migration from OTP to reprogrammable memory technologies, or when I/O count flexibility allows component optimization while maintaining core functional compatibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	PIC16C770-E/SS
Manufacturer	Microchip Technology
Core Processor	PIC
Core Size	8-Bit
Speed	20MHz
Program Memory Type	OTP
Program Memory Size	4.6KB (2K x 14)
RAM Size	256 x 8
Voltage Supply (Vcc/Vdd)	4V ~ 5.5V
Number of I/O	15
Connectivity	I2C, SPI
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
Data Converters	A/D 6x12b
Operating Temperature	-40°C ~ 125°C (TA)
Mounting Type	Surface Mount
Package / Case	20-SSOP (0.209", 5.30mm Width)
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the PIC16C770-E/SS is determined by the following critical parameters:

Core Compatibility Requirements:

Identical processor architecture (PIC core)
Matching 8-bit core size
Identical 20MHz speed rating
Identical 4.6KB (2K x 14) program memory capacity
Matching 256 x 8 RAM configuration
Identical voltage supply range (4V ~ 5.5V)
Identical package type and pinout (20-SSOP)

Allowable Variations:

Program memory type: OTP to FLASH (reprogrammable alternative)
I/O count: 15 to 16 (minor increase in available pins)
Data converter resolution: A/D 6x12b to A/D 5x10b (specification change)
EEPROM availability: None to 256 x 8 (added functionality)

The PIC16F819-E/SS qualifies as a direct substitute based on these parameters, offering FLASH memory reprogrammability while maintaining all core electrical and mechanical specifications.

Parameter Comparison

Parameter	PIC16C770-E/SS	PIC16F819-E/SS	Compatibility
Manufacturer	Microchip Technology	Microchip Technology	Identical
Core Processor	PIC	PIC	Identical
Core Size	8-Bit	8-Bit	Identical
Speed	20MHz	20MHz	Identical
Program Memory Size	4.6KB (2K x 14)	4.6KB (2K x 14)	Identical
Program Memory Type	OTP	FLASH	Variation Allowed
RAM Size	256 x 8	256 x 8	Identical
Voltage Supply (Vcc/Vdd)	4V ~ 5.5V	4V ~ 5.5V	Identical
Number of I/O	15	16	Variation Allowed
Connectivity	I2C, SPI	I2C, SPI	Identical
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT	Identical
Operating Temperature	-40°C ~ 125°C (TA)	-40°C ~ 125°C (TA)	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Package / Case	20-SSOP (0.209", 5.30mm Width)	20-SSOP (0.209", 5.30mm Width)	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
Product Status	Active	Active	Identical

Engineering Selection Recommendations

PIC16F819-E/SS as Primary Substitute:

The PIC16F819-E/SS is qualified as a direct substitute for the PIC16C770-E/SS based on identical core specifications, matching electrical parameters, and compatible package configuration. Both devices maintain active production status and full RoHS3 compliance.

The primary functional difference is program memory technology: the PIC16F819-E/SS uses FLASH memory instead of OTP, enabling field reprogrammability. This represents an enhancement rather than a limitation for applications requiring firmware updates or development flexibility.

The PIC16F819-E/SS provides one additional I/O pin (16 versus 15), which does not create incompatibility and may provide design flexibility. The data converter specification change (A/D 5x10b versus A/D 6x12b) represents a specification variation that must be evaluated against application requirements.

Both devices are supplied in identical 20-SSOP packaging with matching pinout compatibility, supporting direct board-level substitution without layout modification.

Frequently Asked Questions (FAQ)

Q: Can the PIC16F819-E/SS replace the PIC16C770-E/SS in existing designs?

A: Yes. The PIC16F819-E/SS maintains identical core processor architecture, speed, memory capacity, voltage supply range, and package configuration. Direct substitution is supported at the component level. Firmware compatibility depends on application-specific code requirements.

Q: What is the primary advantage of the PIC16F819-E/SS substitute?

A: The PIC16F819-E/SS uses FLASH memory technology, enabling in-circuit reprogramming and field firmware updates. The PIC16C770-E/SS uses OTP memory, which is programmed once during manufacturing and cannot be modified.

Q: Are there pinout differences between these devices?

A: Both devices use 20-SSOP packaging with identical physical dimensions (0.209", 5.30mm Width). The PIC16F819-E/SS provides 16 I/O pins versus 15 on the PIC16C770-E/SS. Pin compatibility must be verified against specific application requirements.

Q: Do both devices support the same communication protocols?

A: Yes. Both the PIC16C770-E/SS and PIC16F819-E/SS support I2C and SPI connectivity, with identical peripheral integration including PWM, watchdog timer, and brown-out detection.

Q: What is the difference in data converter specifications?

A: The PIC16C770-E/SS includes A/D 6x12b (6 channels, 12-bit resolution). The PIC16F819-E/SS includes A/D 5x10b (5 channels, 10-bit resolution). Application requirements determine whether this specification change is acceptable.

Q: Are both devices RoHS compliant?

A: Yes. Both the PIC16C770-E/SS and PIC16F819-E/SS are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the operating temperature range for both devices?

A: Both devices operate across -40°C to 125°C (TA), supporting industrial and extended temperature applications.

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