23K640T-I/ST SRAM Memory IC Equivalent & Substitute Parts

Part Overview

The 23K640T-I/ST is a 64Kbit Serial Peripheral Interface (SPI) SRAM memory integrated circuit manufactured by Microchip Technology. This volatile memory device operates at 20 MHz with a supply voltage range of 2.7V to 3.6V and is housed in an 8-TSSOP surface mount package. The part is currently in active production status. Equivalent and substitute parts are identified based on matching electrical specifications, memory organization, interface protocol, and physical packaging requirements.

Substiute Parts

23K640T-I/ST

Microchip TechnologyIn Stock: 401523K640T-I/ST Datasheet

Current PartRFQ

23K640-I/ST

Microchip TechnologyIn Stock: 225223K640-I/ST Datasheet

DirectRFQ

N64S830HAT22I

onsemiIn Stock: 929N64S830HAT22I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 23K640T-I/ST are qualified based on the following critical parameters:

• Memory capacity of 64Kbit with 8K x 8 organization
• SPI serial interface protocol
• 20 MHz maximum clock frequency operation
• Supply voltage compatibility within 2.7V to 3.6V range
• Operating temperature range of -40°C to 85°C
• 8-TSSOP surface mount package with identical physical dimensions
• ROHS3 compliance and REACH unaffected status

Parts meeting all these electrical and mechanical criteria are considered direct substitutes. Packaging format variations (Cut Tape versus Tube) do not affect functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The 23K640-I/ST from Microchip Technology is the primary direct substitute for the 23K640T-I/ST. Both parts are manufactured by the same supplier, share identical electrical specifications and package dimensions, and maintain active product status. The only difference is packaging format: the main part is supplied in Cut Tape format while the substitute is supplied in Tube format. Both carry MSL Level 1 rating and full ROHS3 compliance.

The N64S830HAT22I from onsemi meets all electrical and mechanical requirements but carries an obsolete product status designation. This part features MSL Level 3 moisture sensitivity, requiring controlled storage conditions of 168 hours maximum before reflow soldering. Selection of this part should account for its discontinued status and increased moisture handling requirements.

Frequently Asked Questions (FAQ)

Q: Can 23K640-I/ST replace 23K640T-I/ST in production applications?

A: Yes. Both parts are electrically and mechanically identical. The difference is packaging format only. 23K640-I/ST is supplied in Tube packaging while 23K640T-I/ST is supplied in Cut Tape format. Both maintain identical MSL Level 1 ratings and ROHS3 compliance.

Q: What is the significance of the product status difference between the main part and N64S830HAT22I?

A: The 23K640T-I/ST maintains active production status, ensuring continued availability and manufacturer support. The N64S830HAT22I is classified as obsolete, indicating discontinued production. Obsolete parts may have limited inventory and no future manufacturing commitments.

Q: Does the MSL Level 3 rating of N64S830HAT22I affect substitution suitability?

A: MSL Level 3 requires moisture bake-out procedures and limits storage time to 168 hours after packaging opening before reflow soldering. This increases handling complexity compared to MSL Level 1 parts. Selection depends on manufacturing process capabilities and storage infrastructure.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use the 8-TSSOP package with identical physical dimensions of 0.173" width and 4.40mm body width. Pin configuration and SPI interface protocol are identical across all parts.

Q: What electrical parameters must match for functional substitution?

A: Critical matching parameters are 64Kbit memory capacity, 8K x 8 organization, SPI interface, 20 MHz clock frequency, 2.7V to 3.6V supply voltage range, and -40°C to 85°C operating temperature range. All three parts meet these specifications.