COP8SAC720M8 Equivalent & Substitute Parts

Part Overview

The COP8SAC720M8 is an 8-bit microcontroller from Texas Instruments' COP8™ 8SA series, featuring 4KB OTP program memory, 128 bytes of RAM, and 16 I/O pins. Designed for embedded applications requiring low-power operation across a 2.7V to 5.5V supply range, this device integrates essential peripherals including PWM, watchdog timer, and power-on reset functionality.

The COP8SAC720M8 is classified as obsolete. Identifying suitable substitute components is necessary to support legacy system maintenance, design updates, and long-term product availability planning.

Key Parameters

Parameter	Value
Core Processor	COP8
Core Size	8-Bit
Speed	10MHz
Program Memory Size	4KB (4K x 8)
Program Memory Type	OTP
RAM Size	128 x 8
Number of I/O	16
Voltage Supply Range	2.7V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	20-SOIC
Connectivity	Microwire/Plus (SPI)
Peripherals	POR, PWM, WDT

Substitute Part Grouping Explanation

Substitution of the COP8SAC720M8 is based on the following critical parameters:

Program Memory Capacity: 4KB minimum requirement
I/O Pin Count: 16 pins minimum
Operating Temperature Range: -40°C to 85°C compatibility
Supply Voltage Compatibility: Overlap within specified ranges
Package Pin Count: 20-pin configuration
Serial Communication: SPI or equivalent protocol support

The MSP430G2302IPW20R qualifies as a substitute based on matching program memory size (4KB), I/O count (16), temperature range (-40°C to 85°C), and 20-pin package configuration. While the MSP430G2302IPW20R operates at a different core architecture (16-bit versus 8-bit) and uses FLASH memory instead of OTP, these differences do not preclude functional substitution in applications where the core instruction set and memory technology can be accommodated through firmware adaptation.

Parameter Comparison

Parameter	COP8SAC720M8	MSP430G2302IPW20R
Manufacturer	Texas Instruments	Texas Instruments
Core Size	8-Bit	16-Bit
Speed	10MHz	16MHz
Program Memory Size	4KB (4K x 8)	4KB (4K x 8)
Program Memory Type	OTP	FLASH
RAM Size	128 x 8	256 x 8
Number of I/O	16	16
Voltage Supply Range	2.7V ~ 5.5V	1.8V ~ 3.6V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	20-SOIC	20-TSSOP
Connectivity	Microwire/Plus (SPI)	I2C, SPI, USI
Peripherals	POR, PWM, WDT	Brown-out Detect/Reset, DMA, POR, PWM, WDT
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

The MSP430G2302IPW20R is an active product with ROHS3 compliance, providing long-term availability and regulatory alignment compared to the obsolete COP8SAC720M8. Both devices share identical program memory capacity (4KB), I/O pin count (16), and operating temperature range (-40°C to 85°C).

Key considerations for selection:

Supply Voltage: The COP8SAC720M8 operates at 2.7V to 5.5V, while the MSP430G2302IPW20R operates at 1.8V to 3.6V. Applications requiring 5V operation cannot use the MSP430G2302IPW20R without voltage regulation.
Memory Technology: The COP8SAC720M8 uses OTP memory; the MSP430G2302IPW20R uses FLASH. FLASH memory enables in-system reprogramming, offering development and field update advantages.
Package Footprint: The COP8SAC720M8 uses 20-SOIC (0.295" width); the MSP430G2302IPW20R uses 20-TSSOP (0.173" width). PCB layout modifications are required for package migration.
Regulatory Compliance: The MSP430G2302IPW20R meets ROHS3 requirements, supporting modern supply chain and environmental compliance mandates.

Frequently Asked Questions (FAQ)

Q: Can the MSP430G2302IPW20R directly replace the COP8SAC720M8 without firmware changes?

A: No. While both devices share 4KB program memory and 16 I/O pins, the MSP430G2302IPW20R uses a 16-bit architecture versus the COP8SAC720M8's 8-bit architecture. Firmware must be ported to the MSP430 instruction set. Additionally, peripheral register maps and initialization sequences differ between the two architectures.

Q: What is the impact of the supply voltage difference (2.7V–5.5V versus 1.8V–3.6V)?

A: Applications operating at 5V cannot use the MSP430G2302IPW20R without external voltage regulation to reduce supply voltage to 3.6V maximum. Systems operating within the 1.8V to 3.6V range are compatible with both devices.

Q: Why does the MSP430G2302IPW20R have more RAM (256 x 8 versus 128 x 8)?

A: The MSP430G2302IPW20R provides double the RAM capacity. This additional memory supports more complex firmware implementations and larger data structures without external memory requirements.

Q: Are the package dimensions compatible for direct PCB substitution?

A: No. The COP8SAC720M8 uses 20-SOIC (0.295" width); the MSP430G2302IPW20R uses 20-TSSOP (0.173" width). PCB footprints differ and require layout redesign. Both packages maintain 20-pin configurations with identical pin pitch.

Q: What are the advantages of FLASH memory over OTP?

A: FLASH memory in the MSP430G2302IPW20R enables in-system reprogramming, field firmware updates, and development flexibility. OTP memory in the COP8SAC720M8 is programmed once and cannot be modified, suitable only for production-locked applications.

Q: Is the MSP430G2302IPW20R suitable for legacy system maintenance?

A: Yes, provided supply voltage and firmware compatibility requirements are met. The active product status ensures long-term availability and support compared to the obsolete COP8SAC720M8.

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