AT25DF021A-XMHN-B Equivalent & Substitute Parts

Part Overview

The AT25DF021A-XMHN-B is a 2Mbit Serial Peripheral Interface (SPI) FLASH memory IC manufactured by Renesas Electronics Corporation. This non-volatile memory device operates at 104 MHz with a supply voltage range of 1.65V to 3.6V and is housed in an 8-TSSOP surface mount package. The part is currently in active production status and is ROHS3 compliant. Substitute parts are identified when packaging format or operational frequency parameters differ while maintaining core electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Memory Size	2Mbit
Memory Organization	256K x 8
Memory Interface	SPI
Clock Frequency	104 MHz
Voltage Supply Range	1.65V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Package Type	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Write Cycle Time (Word/Page)	8µs / 2.5ms

Substitute Part Grouping Explanation

Substitute parts for the AT25DF021A-XMHN-B are identified based on the following criteria:

Primary Substitution Criteria:

Memory capacity: 2Mbit
Memory organization: 256K x 8
Interface protocol: SPI
Package type: 8-TSSOP
Supply voltage: 1.65V ~ 3.6V
Operating temperature range: -40°C ~ 85°C
Mounting type: Surface Mount

Allowed Variation Parameters:

Packaging format (Tube vs. Tape & Reel)
Clock frequency (104 MHz or lower)
Moisture Sensitivity Level (MSL)
Write cycle timing (within functional tolerance)

Parts that maintain all primary criteria while varying in packaging format or clock frequency are classified as direct substitutes.

Parameter Comparison

Parameter	AT25DF021A-XMHN-B (Main)	AT25DF021A-XMHN-T (Substitute)	AT25XE021A-XMHN-T (Substitute)
Manufacturer	Renesas Electronics	Renesas Electronics	Renesas Electronics
Memory Size	2Mbit	2Mbit	2Mbit
Memory Organization	256K x 8	256K x 8	256K x 8
Memory Interface	SPI	SPI	SPI
Clock Frequency	104 MHz	104 MHz	70 MHz
Voltage Supply	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	8-TSSOP	8-TSSOP	8-TSSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Packaging Format	Tube	Tape & Reel	Tape & Reel
Write Cycle Time (Word)	8µs	8µs	8µs
Write Cycle Time (Page)	2.5ms	2.5ms	5ms
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active

Engineering Selection Recommendations

AT25DF021A-XMHN-T: This part is electrically and mechanically identical to the main part AT25DF021A-XMHN-B. The only difference is the packaging format (Tape & Reel instead of Tube) and improved moisture sensitivity rating (MSL 1 vs. MSL 3). Both parts operate at 104 MHz and are ROHS3 compliant with active product status. Selection between these two depends on procurement and assembly requirements.

AT25XE021A-XMHN-T: This part maintains the same memory capacity, organization, interface protocol, voltage supply range, operating temperature, and package type as the main part. The clock frequency is reduced to 70 MHz, and the page write cycle time is extended to 5ms. This part is suitable for applications where the lower clock frequency is acceptable. Both parts are ROHS3 compliant with active product status and MSL 1 rating.

Frequently Asked Questions (FAQ)

Q: Can AT25DF021A-XMHN-T be used as a direct replacement for AT25DF021A-XMHN-B?

A: Yes. Both parts have identical electrical specifications, memory capacity, interface, voltage range, and operating temperature. The difference is packaging format (Tape & Reel vs. Tube) and moisture sensitivity level. Electrical and mechanical compatibility is maintained.

Q: What is the key difference between AT25DF021A-XMHN-T and AT25XE021A-XMHN-T?

A: The primary difference is clock frequency. AT25DF021A-XMHN-T operates at 104 MHz with a 2.5ms page write cycle time. AT25XE021A-XMHN-T operates at 70 MHz with a 5ms page write cycle time. Both maintain the same memory capacity and SPI interface.

Q: Are all substitute parts ROHS3 compliant?

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

Q: Does packaging format affect electrical performance?

A: No. Tube and Tape & Reel packaging formats do not affect electrical performance. The difference is in handling, storage, and assembly process compatibility.

Q: Can AT25XE021A-XMHN-T be used in applications requiring 104 MHz operation?

A: No. AT25XE021A-XMHN-T is rated for 70 MHz maximum clock frequency. Applications requiring 104 MHz operation must use AT25DF021A-XMHN-B or AT25DF021A-XMHN-T.

Q: What does MSL rating indicate?

A: Moisture Sensitivity Level (MSL) indicates the maximum time a component can be exposed to moisture before soldering. MSL 1 (Unlimited) allows indefinite storage. MSL 3 (168 Hours) requires soldering within 168 hours of moisture exposure.

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