23LCV1024T-E/ST Equivalent & Substitute Parts

Part Overview

The 23LCV1024T-E/ST is a 1Mbit Synchronous SRAM memory IC manufactured by Microchip Technology, featuring SPI Dual I/O interface and 20 MHz clock frequency. This component is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations. The part is housed in an 8-TSSOP surface mount package and operates across a wide supply voltage range of 2.5V to 5.5V with temperature stability from -40°C to 125°C.

Key Parameters

Parameter	Value
Manufacturer Part Number	23LCV1024T-E/ST
Manufacturer	Microchip Technology
Memory Type	Volatile SRAM
Memory Size	1Mbit
Memory Organization	128K x 8
Memory Interface	SPI - Dual I/O
Clock Frequency	20 MHz
Voltage Supply Range	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 125°C (TA)
Package Type	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 23LCV1024T-E/ST is determined by the following critical parameters:

Memory capacity: 1Mbit (128K x 8 organization)
Package compatibility: 8-TSSOP surface mount form factor
Operating temperature range: -40°C to 125°C
Regulatory compliance: ROHS3 and REACH status alignment
Interface protocol: SPI-based memory access

The 23A1024T-E/ST qualifies as a substitute based on matching memory capacity, identical package footprint, overlapping temperature specifications, and equivalent regulatory compliance. However, the substitute introduces differences in interface capability (SPI Quad I/O versus Dual I/O) and supply voltage range, which must be evaluated within the context of the target application's electrical requirements.

Parameter Comparison

Parameter	23LCV1024T-E/ST (Main Part)	23A1024T-E/ST (Substitute)
Manufacturer	Microchip Technology	Microchip Technology
Memory Type	Volatile SRAM	Volatile SRAM
Memory Size	1Mbit	1Mbit
Memory Organization	128K x 8	128K x 8
Memory Interface	SPI - Dual I/O	SPI - Quad I/O
Clock Frequency	20 MHz	16 MHz
Voltage Supply Range	2.5V ~ 5.5V	1.7V ~ 2.2V
Operating Temperature	-40°C ~ 125°C (TA)	-40°C ~ 125°C (TA)
Package Type	8-TSSOP (0.173", 4.40mm Width)	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount	Surface Mount
Product Status	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Packaging	Bulk	Tape & Reel (TR)

Engineering Selection Recommendations

The 23A1024T-E/ST is an active product substitute for the obsolete 23LCV1024T-E/ST, offering continued availability and manufacturing support. Both components maintain ROHS3 compliance and identical thermal operating ranges, ensuring regulatory and environmental consistency.

Selection of the 23A1024T-E/ST requires evaluation of three critical differences:

Supply voltage compatibility is the primary consideration. The substitute operates within 1.7V to 2.2V, a narrower range than the original part's 2.5V to 5.5V specification. Applications requiring the original's extended voltage range cannot use this substitute without circuit redesign.

Interface capability differs between parts. The substitute provides SPI Quad I/O functionality compared to the original's Dual I/O, offering enhanced data throughput potential. This represents a functional enhancement rather than a limitation, provided the host controller supports quad I/O protocol.

Clock frequency is reduced from 20 MHz to 16 MHz in the substitute. Applications with timing-critical requirements operating at the original's maximum frequency must confirm that 16 MHz operation meets system performance specifications.

Frequently Asked Questions (FAQ)

Q: Can the 23A1024T-E/ST directly replace the 23LCV1024T-E/ST in existing designs?

A: Direct replacement is possible only if the application operates within the substitute's supply voltage range (1.7V to 2.2V) and does not require the original's 20 MHz clock frequency. The host controller must support SPI Quad I/O protocol to utilize the substitute's enhanced interface capability.

Q: What is the primary reason for seeking a substitute for the 23LCV1024T-E/ST?

A: The original part is classified as obsolete. The 23A1024T-E/ST is an active product from the same manufacturer, ensuring continued availability and manufacturing support for new production runs and system maintenance.

Q: Are the package dimensions identical between these parts?

A: Yes. Both components use the 8-TSSOP package with 0.173" width and 4.40mm dimensions, ensuring identical PCB footprint and mounting compatibility.

Q: What compliance certifications apply to both parts?

A: Both the 23LCV1024T-E/ST and 23A1024T-E/ST are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.

Q: How do the SPI interface differences affect system design?

A: The original part supports Dual I/O (two data lines), while the substitute supports Quad I/O (four data lines). Quad I/O provides higher data throughput but requires host controller support. If the host controller only supports Dual I/O, the substitute's quad capability remains unused but does not prevent operation.

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