AT90S1200-4SC Equivalent & Substitute Parts

Part Overview

The AT90S1200-4SC is an 8-bit AVR microcontroller from Microchip Technology's AVR 90S series, featuring 1KB of FLASH program memory and operating at 4MHz. This device is classified as obsolete and is no longer in active production. Due to its discontinued status, identifying functionally compatible substitute parts is essential for system redesign, production continuation, and long-term component availability planning.

Substiute Parts

AT90S1200-4SC

Microchip TechnologyIn Stock: 4844AT90S1200-4SC Datasheet

Current PartRFQ

ATTINY2313V-10SU

Microchip TechnologyIn Stock: 2105ATTINY2313V-10SU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT90S1200-4SC is determined by the following critical parameters:

• Processor Architecture: AVR core compatibility ensures instruction set and programming methodology alignment
• Package Type: 20-SOIC form factor maintains PCB layout compatibility and pin-to-pin mechanical fit
• Memory Configuration: FLASH program memory and EEPROM capacity must meet or exceed application requirements
• I/O Pin Count: Minimum 15 I/O pins required for circuit functionality
• Voltage Supply Range: Operating voltage window must encompass the application's power supply specifications
• Connectivity Protocols: SPI support is mandatory for system integration
• Peripheral Set: Watchdog Timer (WDT) and Power-On Reset (POR) functionality must be present

The ATTINY2313V-10SU meets all substitution criteria through identical package geometry, superior memory specifications, expanded peripheral support, and active product status with modern compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The ATTINY2313V-10SU is the qualified substitute for the AT90S1200-4SC based on the following engineering criteria:

Package Compatibility: Both devices utilize the 20-SOIC package with identical physical dimensions (0.295", 7.50mm width), enabling direct PCB layout compatibility without redesign.

Processor Architecture: Both employ the AVR core architecture, ensuring source code compatibility and identical programming methodology through SPI interface.

Memory Sufficiency: The ATTINY2313V-10SU provides 2KB FLASH program memory and 128 x 8 EEPROM, exceeding the 1KB FLASH and 64 x 8 EEPROM of the original part. This enhancement supports expanded application scope without memory constraints.

I/O Capability: The substitute provides 18 I/O pins, surpassing the 15-pin requirement of the AT90S1200-4SC, offering additional design flexibility.

Voltage Supply Range: The ATTINY2313V-10SU operates within 1.8V ~ 5.5V, which encompasses the original 2.7V ~ 6V specification within the common operating window of 2.7V ~ 5.5V.

Peripheral Enhancement: The substitute includes Brown-out Detect/Reset, PWM, and UART/USART connectivity in addition to the mandatory POR and WDT functions, providing superior system integration capabilities.

Product Status and Compliance: The ATTINY2313V-10SU is an active product with ROHS3 compliance, ensuring long-term availability and regulatory alignment for new designs and production continuity.

Frequently Asked Questions (FAQ)

Q: Can the ATTINY2313V-10SU be used as a direct replacement without firmware modification?

A: The ATTINY2313V-10SU shares the AVR instruction set architecture with the AT90S1200-4SC. Existing firmware compiled for the AT90S1200-4SC will execute on the substitute without modification. However, peripheral configuration code specific to the original device may require adjustment to utilize the enhanced features of the substitute.

Q: What is the impact of the higher clock speed (10MHz vs. 4MHz) on system operation?

A: The ATTINY2313V-10SU operates at 10MHz, providing 2.5x the processing speed of the original 4MHz device. Applications designed for the AT90S1200-4SC will execute faster on the substitute. Timing-critical code sections should be reviewed to ensure compatibility with the increased clock frequency.

Q: Are there voltage supply considerations when substituting these parts?

A: The ATTINY2313V-10SU operates within 1.8V ~ 5.5V, while the AT90S1200-4SC operates within 2.7V ~ 6V. For applications using supply voltages between 2.7V and 5.5V, both devices are compatible. Applications requiring operation above 5.5V or below 2.7V require design modification.

Q: Does the 20-SOIC package remain identical between both parts?

A: Yes. Both the AT90S1200-4SC and ATTINY2313V-10SU use the 20-SOIC package with identical physical dimensions (0.295", 7.50mm width). PCB footprints and socket compatibility are maintained without modification.

Q: What compliance advantages does the ATTINY2313V-10SU provide?

A: The ATTINY2313V-10SU is ROHS3 compliant, whereas the AT90S1200-4SC is RoHS non-compliant. For applications subject to RoHS regulations or customer requirements, the substitute ensures regulatory compliance and eliminates obsolescence risk through active product status.

Q: Is the SPI connectivity identical between both devices?

A: Both devices support SPI connectivity. The ATTINY2313V-10SU additionally provides UART/USART serial communication, expanding integration options beyond the original part's capabilities.