AT45DB161E-CCUD-T Equivalent & Substitute Parts

Part Overview

The AT45DB161E-CCUD-T is a 16Mbit FLASH memory IC manufactured by Renesas Electronics Corporation, featuring SPI interface operation at 85 MHz in a 9-UBGA (6x6) surface mount package. This device is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The part operates across a supply voltage range of 2.5V to 3.6V and supports industrial temperature ranges from -40°C to 85°C.

Key Parameters

Parameter	Value
Memory Size	16Mbit
Memory Format	FLASH
Memory Interface	SPI
Clock Frequency	85 MHz
Memory Organization	528 Bytes x 4096 pages
Voltage Supply Range	2.5V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Package Type	9-UBGA (6x6)
Write Cycle Time (Page)	4ms
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution for the AT45DB161E-CCUD-T is determined by the following critical parameters:

Memory Capacity: 16Mbit (non-negotiable)
Memory Type: FLASH, Non-Volatile
Interface Protocol: SPI or SPI-compatible (Quad I/O extends SPI capability)
Clock Frequency: 85 MHz minimum
Supply Voltage Compatibility: Overlap within 2.5V ~ 3.6V range
Operating Temperature Range: -40°C ~ 85°C
Package Compatibility: Form factor and pinout alignment

Substitute parts are grouped into two categories based on package type: 9-UBGA (6x6) direct replacements and alternative package options that maintain electrical compatibility.

Parameter Comparison

Parameter	AT45DB161E-CCUD-T (Main)	AT45DQ161-CCUD-T	AT45DQ161-SSHF2B-T
Memory Size	16Mbit	16Mbit	16Mbit
Memory Format	FLASH	FLASH	FLASH
Memory Interface	SPI	SPI - Quad I/O	SPI - Quad I/O
Clock Frequency	85 MHz	85 MHz	85 MHz
Voltage Supply Range	2.5V ~ 3.6V	2.5V ~ 3.6V	2.3V ~ 3.6V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	9-UBGA (6x6)	9-UBGA (6x6)	8-SOIC (0.154", 3.90mm Width)
Write Cycle Time (Page)	4ms	6ms	6ms
Product Status	Obsolete	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)	3 (168 Hours)	1 (Unlimited)

Engineering Selection Recommendations

AT45DQ161-CCUD-T serves as the primary substitute for the AT45DB161E-CCUD-T. Both devices share identical package geometry (9-UBGA 6x6), voltage supply range (2.5V ~ 3.6V), operating temperature range (-40°C ~ 85°C), and clock frequency (85 MHz). The AT45DQ161-CCUD-T is actively manufactured and ROHS3 compliant, addressing the obsolescence of the original part. The extended SPI-Quad I/O interface provides backward compatibility with standard SPI operation while enabling higher data throughput when quad mode is utilized. Page write cycle time increases from 4ms to 6ms, which must be evaluated against application timing requirements.

AT45DQ161-SSHF2B-T provides an alternative substitute with different package geometry (8-SOIC). This option is suitable for applications where PCB layout constraints or manufacturing processes favor SOIC packaging over BGA. The lower voltage supply floor (2.3V vs. 2.5V) extends operational range. Moisture sensitivity level improves to MSL 1 (Unlimited), eliminating bake-out requirements. The 8-SOIC package requires PCB redesign and is not a direct pin-compatible replacement.

Both substitute parts maintain REACH compliance and EAR99 export classification consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can AT45DQ161-CCUD-T directly replace AT45DB161E-CCUD-T without PCB modification?

A: Yes. Both devices use identical 9-UBGA (6x6) packaging with matching pinout. No PCB layout changes are required for direct substitution.

Q: What is the functional difference between SPI and SPI-Quad I/O interfaces?

A: SPI-Quad I/O extends the standard SPI protocol to support four data lines simultaneously, increasing data throughput. Standard SPI operation remains fully supported, ensuring backward compatibility with existing firmware.

Q: Does the increased page write cycle time (4ms to 6ms) affect system performance?

A: Page write cycle time impacts only the duration of write operations. Applications must verify that the 6ms page write time aligns with system timing budgets. Read operations and clock frequency remain unchanged.

Q: Why is AT45DQ161-SSHF2B-T packaged differently?

A: The 8-SOIC package offers manufacturing and assembly advantages in certain production environments. This option requires PCB redesign and is not pin-compatible with the original 9-UBGA device.

Q: Are both substitute parts suitable for industrial temperature applications?

A: Yes. Both AT45DQ161-CCUD-T and AT45DQ161-SSHF2B-T support the full -40°C to 85°C operating temperature range required for industrial applications.

Q: What is the inventory status of substitute parts?

A: AT45DQ161-CCUD-T has 922 units in stock. AT45DQ161-SSHF2B-T has 11,620 units in stock, providing greater availability for immediate procurement.

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