AT45DQ161-SHF-B Equivalent & Substitute Parts

Part Overview

The AT45DQ161-SHF-B is a 16Mbit FLASH memory IC manufactured by Renesas Electronics Corporation, featuring SPI Quad I/O interface capability at 85 MHz operational frequency. This non-volatile memory device is supplied in 8-SOIC surface mount packaging and is currently in active product status. The device operates across a supply voltage range of 2.3V to 3.6V and supports industrial temperature ranges from -40°C to 105°C. Identifying equivalent substitute parts is necessary to ensure supply chain flexibility, optimize procurement strategies, and maintain design continuity when the primary part number becomes unavailable or when alternative packaging formats better suit manufacturing requirements.

Key Parameters

Parameter	Value
Memory Size	16Mbit
Memory Format	FLASH
Memory Interface	SPI - Quad I/O
Clock Frequency	85 MHz
Memory Organization	528 Bytes x 4096 pages
Write Cycle Time (Word/Page)	8µs / 6ms
Voltage Supply Range	2.3V ~ 3.6V
Operating Temperature	-40°C ~ 105°C (TC)
Package Type	8-SOIC (0.209", 5.30mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the AT45DQ161-SHF-B is determined by strict equivalence across the following critical parameters:

Memory capacity: 16Mbit
Memory technology: FLASH non-volatile
Interface protocol: SPI Quad I/O
Operating frequency: 85 MHz
Memory organization: 528 Bytes x 4096 pages
Write performance: 8µs word cycle, 6ms page cycle
Supply voltage range: 2.3V ~ 3.6V
Temperature rating: -40°C ~ 105°C
Package footprint: 8-SOIC with 5.30mm width
Compliance certifications: ROHS3, REACH Unaffected

The primary distinction between the main part and its substitute relates to packaging format (Tube versus Tape & Reel), which does not affect electrical or mechanical compatibility. Both parts share identical base product number AT45DQ161 and are manufactured by Renesas Electronics Corporation.

Parameter Comparison

Parameter	AT45DQ161-SHF-B (Main)	AT45DQ161-SHFHD-T (Substitute)
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation
Memory Size	16Mbit	16Mbit
Memory Format	FLASH	FLASH
Memory Interface	SPI - Quad I/O	SPI - Quad I/O
Clock Frequency	85 MHz	85 MHz
Memory Organization	528 Bytes x 4096 pages	528 Bytes x 4096 pages
Write Cycle Time (Word)	8µs	8µs
Write Cycle Time (Page)	6ms	6ms
Voltage Supply Range	2.3V ~ 3.6V	2.3V ~ 3.6V
Operating Temperature	-40°C ~ 105°C (TC)	-40°C ~ 105°C (TC)
Package Type	8-SOIC (0.209", 5.30mm Width)	8-SOIC (0.209", 5.30mm Width)
Mounting Type	Surface Mount	Surface Mount
Packaging Format	Tube	Tape & Reel (TR)
Product Status	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Both AT45DQ161-SHF-B and AT45DQ161-SHFHD-T are active products from Renesas Electronics Corporation with identical electrical specifications and mechanical compatibility. Selection between these parts should be based on procurement and manufacturing requirements:

The AT45DQ161-SHF-B in Tube packaging is suitable for lower-volume applications or manual assembly processes. The AT45DQ161-SHFHD-T in Tape & Reel format is optimized for high-volume automated assembly operations and provides improved handling efficiency in pick-and-place manufacturing environments.

Both parts maintain full compliance with ROHS3 and REACH regulations, ensuring regulatory alignment for industrial and consumer applications. The identical Moisture Sensitivity Level (MSL 1) indicates both parts have unlimited shelf life under standard storage conditions.

Frequently Asked Questions (FAQ)

Q: Can AT45DQ161-SHFHD-T be used as a direct replacement for AT45DQ161-SHF-B in circuit design?

A: Yes. Both parts are electrically and mechanically identical. The only difference is packaging format (Tube versus Tape & Reel). PCB layout, schematic connections, and firmware compatibility remain unchanged.

Q: What is the primary reason to choose Tape & Reel packaging over Tube packaging?

A: Tape & Reel packaging is designed for automated assembly lines using pick-and-place equipment. It provides faster component feeding, reduced manual handling, and improved manufacturing throughput. Tube packaging is more suitable for manual assembly or lower-volume production runs.

Q: Are there any compliance or certification differences between these parts?

A: No. Both parts carry identical ROHS3 compliance and REACH Unaffected status. They meet the same regulatory requirements for industrial and commercial applications.

Q: Does packaging format affect the device's electrical performance or reliability?

A: No. Packaging format is a supply chain and manufacturing consideration only. Electrical performance, operating frequency, memory capacity, and reliability characteristics are identical between both part numbers.

Q: What is the significance of MSL 1 (Unlimited) rating?

A: MSL 1 indicates the component has unlimited shelf life under standard storage conditions (typically 23°C, 50% relative humidity). No baking or special storage procedures are required before assembly.

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