AT25XE021A-SSHN-B Equivalent & Substitute Parts

Part Overview

The AT25XE021A-SSHN-B is a 2Mbit FLASH memory IC manufactured by Renesas Electronics Corporation, designed for SPI serial interface applications operating at 70 MHz. This non-volatile memory device is packaged in 8-SOIC surface mount configuration and is currently in active production status. Substitute parts are identified to address packaging format requirements, performance specifications, or inventory availability while maintaining electrical and mechanical compatibility within the defined parameter constraints.

Key Parameters

Parameter	Value
Memory Size	2Mbit
Memory Organization	256K x 8
Memory Interface	SPI
Clock Frequency	70 MHz
Supply Voltage Range	1.65V ~ 3.6V
Operating Temperature Range	-40°C ~ 85°C (TC)
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Write Cycle Time - Word	8µs
Write Cycle Time - Page	5ms
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the AT25XE021A-SSHN-B are qualified based on the following electrical and mechanical parameters:

Critical Compatibility Parameters:

Memory Size: 2Mbit (256K x 8 organization)
Memory Interface: SPI serial protocol
Supply Voltage Range: 1.65V ~ 3.6V
Operating Temperature Range: -40°C ~ 85°C (TC)
Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Performance Parameters (Allowed Variation):

Clock Frequency: 70 MHz or higher
Write Cycle Time - Page: 5ms or faster

The AT25XE021A-SSHN-B (Tube packaging) is substitutable with AT25XE021A-SSHN-T (Tape & Reel packaging) as they share identical electrical specifications and differ only in packaging format. The AT25DF021A-SSHN-T is substitutable due to higher clock frequency (104 MHz) and faster page write cycle time (2.5ms), both of which represent performance improvements while maintaining all critical electrical and mechanical parameters.

Parameter Comparison

Parameter	AT25XE021A-SSHN-B (Main)	AT25XE021A-SSHN-T	AT25DF021A-SSHN-T
Memory Size	2Mbit	2Mbit	2Mbit
Memory Organization	256K x 8	256K x 8	256K x 8
Memory Interface	SPI	SPI	SPI
Clock Frequency	70 MHz	70 MHz	104 MHz
Supply Voltage Range	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V
Operating Temperature Range	-40°C ~ 85°C (TC)	-40°C ~ 85°C (TC)	-40°C ~ 85°C (TC)
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Write Cycle Time - Word	8µs	8µs	8µs
Write Cycle Time - Page	5ms	5ms	2.5ms
Packaging Format	Tube	Tape & Reel (TR)	Tape & Reel (TR)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

AT25XE021A-SSHN-T: This substitute is electrically and mechanically identical to the main part AT25XE021A-SSHN-B. The only difference is the packaging format (Tape & Reel versus Tube). Selection of this part is appropriate when Tape & Reel packaging is required for automated assembly processes or when Tube packaging is unavailable. Both parts maintain active product status and ROHS3 compliance.

AT25DF021A-SSHN-T: This substitute offers enhanced performance characteristics with a higher clock frequency (104 MHz versus 70 MHz) and faster page write cycle time (2.5ms versus 5ms). All critical electrical parameters, supply voltage range, operating temperature range, and mechanical specifications remain compatible. This part is suitable for applications requiring higher data throughput or faster write operations. The part is verified as DiGi-Electronics Programmable and maintains active product status with ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can AT25XE021A-SSHN-T be used as a direct replacement for AT25XE021A-SSHN-B?

A: Yes. Both parts are electrically and mechanically identical. The difference is packaging format: Tube versus Tape & Reel. Electrical performance, pin configuration, and all functional parameters are identical.

Q: Is AT25DF021A-SSHN-T compatible with designs specified for AT25XE021A-SSHN-B?

A: Yes. AT25DF021A-SSHN-T maintains all critical electrical parameters including supply voltage range (1.65V ~ 3.6V), operating temperature range (-40°C ~ 85°C), and package configuration (8-SOIC). The higher clock frequency (104 MHz) and faster page write time (2.5ms) represent performance improvements that do not create incompatibility.

Q: What are the key parameters that determine substitutability?

A: Substitutability is determined by: Memory size (2Mbit), memory organization (256K x 8), SPI interface, supply voltage range (1.65V ~ 3.6V), operating temperature range (-40°C ~ 85°C), and 8-SOIC package configuration. Clock frequency and write cycle time may be equal or better in substitute parts.

Q: Does packaging format affect electrical performance?

A: No. Tube and Tape & Reel packaging formats contain identical die and electrical specifications. Packaging format selection is based on assembly process requirements and handling procedures, not electrical performance.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed—AT25XE021A-SSHN-B, AT25XE021A-SSHN-T, and AT25DF021A-SSHN-T—are ROHS3 compliant and REACH unaffected.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message