PIC16F870T-E/SS Equivalent & Substitute Parts

Part Overview

The PIC16F870T-E/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16F series, featuring 4.6KB FLASH program memory, 128 bytes of RAM, and 64 bytes of EEPROM. This device integrates UART/USART connectivity, PWM, watchdog timer, and brown-out detection in a 28-SSOP surface mount package. The main part number is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and production requirements.

Key Parameters

Parameter	Value
Core Processor	PIC
Core Size	8-Bit
Speed	20MHz
Program Memory Size	4.6KB (2K x 14)
Program Memory Type	FLASH
RAM Size	128 x 8
EEPROM Size	64 x 8
Number of I/O	22
Voltage Supply (Vcc/Vdd)	4V ~ 5.5V
Data Converters	A/D 5x10b
Connectivity	UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
Mounting Type	Surface Mount
Package	28-SSOP (0.209", 5.30mm Width)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the PIC16F870T-E/SS is determined by strict equivalence across the following critical parameters:

Core Architecture: PIC 8-bit processor
Memory Configuration: 4.6KB FLASH, 128 bytes RAM, 64 bytes EEPROM
Operating Frequency: 20MHz maximum
I/O Count: 22 I/O pins
Voltage Range: 4V to 5.5V supply
Analog Capability: 5-channel 10-bit A/D converter
Peripheral Set: UART/USART, PWM, WDT, brown-out detection
Package: 28-SSOP surface mount form factor
Compliance: ROHS3, REACH Unaffected, EAR99

The substitute parts PIC16F870-E/SS and PIC16F870-I/SS maintain identical electrical and functional specifications. Differences exist only in temperature rating and product status, which do not affect core substitutability for standard applications.

Parameter Comparison

Parameter	PIC16F870T-E/SS (Main)	PIC16F870-E/SS (Substitute)	PIC16F870-I/SS (Substitute)
Manufacturer	Microchip Technology	Microchip Technology	Microchip Technology
Product Status	Obsolete	Active	Active
Core Size	8-Bit	8-Bit	8-Bit
Speed	20MHz	20MHz	20MHz
Program Memory	4.6KB (2K x 14) FLASH	4.6KB (2K x 14) FLASH	4.6KB (2K x 14) FLASH
RAM	128 x 8	128 x 8	128 x 8
EEPROM	64 x 8	64 x 8	64 x 8
I/O Pins	22	22	22
Voltage Supply	4V ~ 5.5V	4V ~ 5.5V	4V ~ 5.5V
A/D Converter	5x10b	5x10b	5x10b
Connectivity	UART/USART	UART/USART	UART/USART
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)
Package	28-SSOP	28-SSOP	28-SSOP
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

PIC16F870-E/SS is the primary substitute for PIC16F870T-E/SS. Both parts share identical electrical specifications and temperature operating range (-40°C to 125°C). The PIC16F870-E/SS maintains active product status with verified programmability and higher inventory availability (2100 units), making it the preferred choice for new designs and production continuity.

PIC16F870-I/SS serves as an alternative substitute with identical core functionality and electrical characteristics. This part differs only in operating temperature range, limited to -40°C to 85°C. Selection of PIC16F870-I/SS is appropriate only for applications where the reduced upper temperature limit does not conflict with system requirements. Both substitute parts are ROHS3 compliant and carry identical regulatory certifications (REACH Unaffected, EAR99).

Frequently Asked Questions (FAQ)

Q: Can PIC16F870-E/SS and PIC16F870-I/SS be used interchangeably with PIC16F870T-E/SS?

A: Yes, both parts are direct functional equivalents. All core electrical parameters, memory configuration, I/O count, and peripheral sets are identical. Pin-for-pin compatibility is maintained across the 28-SSOP package. Selection between them depends on application temperature requirements.

Q: What is the key difference between PIC16F870-E/SS and PIC16F870-I/SS?

A: The operating temperature range differs. PIC16F870-E/SS operates from -40°C to 125°C, while PIC16F870-I/SS operates from -40°C to 85°C. All other specifications are identical. Applications requiring operation above 85°C must use PIC16F870-E/SS.

Q: Are these parts pin-compatible?

A: Yes. All three part numbers use the 28-SSOP package with identical pinout and electrical characteristics. Direct board-level substitution is possible without layout modifications.

Q: What compliance certifications apply to these substitute parts?

A: Both substitute parts are ROHS3 compliant, REACH Unaffected, and classified under ECCN EAR99. Moisture sensitivity level is rated at MSL 1 (Unlimited). These certifications match the original part.

Q: Why is PIC16F870T-E/SS listed as obsolete?

A: The main part number is no longer in active production. However, functionally equivalent active alternatives (PIC16F870-E/SS and PIC16F870-I/SS) are available from Microchip Technology with full inventory support.

Q: Can I use these parts in existing designs without firmware changes?

A: Yes. The instruction set, memory architecture, and peripheral functionality are identical across all three part numbers. Existing firmware requires no modification for substitution.

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