AT25F512B-SSH-T Equivalent & Substitute Parts

Part Overview

The AT25F512B-SSH-T is a 512Kbit FLASH memory IC with SPI interface manufactured by Renesas Electronics Corporation. This part operates at 70 MHz clock frequency with a supply voltage range of 2.7V to 3.6V and is housed in an 8-SOIC package. The product status is obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	AT25F512B-SSH-T
Memory Size	512Kbit
Memory Organization	64K x 8
Memory Interface	SPI
Clock Frequency	70 MHz
Write Cycle Time - Word	15µs
Write Cycle Time - Page	5ms
Voltage - Supply	2.7V ~ 3.6V
Operating Temperature	-40°C ~ 85°C (TC)
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the AT25F512B-SSH-T is determined by the following critical parameters:

Memory Size: 512Kbit (fixed requirement)
Memory Organization: 64K x 8 (fixed requirement)
Memory Interface: SPI (fixed requirement)
Package / Case: 8-SOIC (fixed requirement)
Operating Temperature: -40°C ~ 85°C (fixed requirement)
Mounting Type: Surface Mount (fixed requirement)

All substitute parts listed maintain these core electrical and mechanical specifications. Variations in clock frequency, write cycle time, and supply voltage range are permitted within the scope of substitution, provided the substitute part meets or exceeds the original specifications or operates within compatible system parameters.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Write Cycle - Word / Page	Voltage - Supply	Package	Product Status	RoHS Status
AT25F512B-SSH-T	Renesas	512Kbit	70 MHz	15µs / 5ms	2.7V ~ 3.6V	8-SOIC	Obsolete	Not Specified
AT25DF512C-SSHN-T	Renesas	512Kbit	104 MHz	8µs / 4.6ms	1.65V ~ 3.6V	8-SOIC	Active	ROHS3 Compliant
AT25DF512C-SSHN-B	Renesas	512Kbit	104 MHz	8µs / 4.6ms	1.65V ~ 3.6V	8-SOIC	Active	ROHS3 Compliant
AT25DF512C-SSHNGU-B	Renesas	512Kbit	104 MHz	8µs / 4.6ms	1.65V ~ 3.6V	8-SOIC	Active	ROHS3 Compliant
AT25DF512C-SSHNGU-T	Renesas	512Kbit	104 MHz	8µs / 4.6ms	1.65V ~ 3.6V	8-SOIC	Active	ROHS3 Compliant
AT25DN512C-SSHF-T	Renesas	512Kbit	104 MHz	8µs / 1.75ms	2.3V ~ 3.6V	8-SOIC	Active	ROHS3 Compliant
AT25DN512C-SSHF-B	Renesas	512Kbit	104 MHz	8µs / 1.75ms	2.3V ~ 3.6V	8-SOIC	Active	ROHS3 Compliant
AT25DN512C-SSHFGP-T	Renesas	512Kbit	104 MHz	8µs / 1.75ms	2.3V ~ 3.6V	8-SOIC	Active	ROHS3 Compliant
AT25DN512C-SSHFGP-B	Renesas	512Kbit	104 MHz	8µs / 1.75ms	2.3V ~ 3.6V	8-SOIC	Active	ROHS3 Compliant
AT25XE512C-SSHN-T	Renesas	512Kbit	104 MHz	12µs / 3ms	1.65V ~ 3.6V	8-SOIC	Active	ROHS3 Compliant
AT25XE512C-SSHN-B	Renesas	512Kbit	104 MHz	12µs / 3ms	1.65V ~ 3.6V	8-SOIC	Active	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts are manufactured by Renesas Electronics Corporation and maintain the same 512Kbit capacity, 64K x 8 organization, SPI interface, and 8-SOIC package as the original AT25F512B-SSH-T. The substitute parts are in active product status, ensuring long-term availability and supply chain continuity.

The AT25DF512C series (AT25DF512C-SSHN-T, AT25DF512C-SSHN-B, AT25DF512C-SSHNGU-B, AT25DF512C-SSHNGU-T) operates at 104 MHz with improved write cycle times and extended supply voltage range (1.65V ~ 3.6V). These parts are ROHS3 compliant with unlimited moisture sensitivity level.

The AT25DN512C series (AT25DN512C-SSHF-T, AT25DN512C-SSHF-B, AT25DN512C-SSHFGP-T, AT25DN512C-SSHFGP-B) provides faster page write cycles (1.75ms) compared to the original part (5ms) and operates within a 2.3V ~ 3.6V supply range. These parts are ROHS3 compliant.

The AT25XE512C series (AT25XE512C-SSHN-T, AT25XE512C-SSHN-B) operates at 104 MHz with extended supply voltage range (1.65V ~ 3.6V) and is ROHS3 compliant.

Selection should be based on system voltage requirements, write cycle time constraints, and packaging format (Tape & Reel, Tube, or Cut Tape).

Frequently Asked Questions (FAQ)

Q: Can AT25DF512C-SSHN-T directly replace AT25F512B-SSH-T?

A: Yes. Both parts maintain 512Kbit capacity, 64K x 8 organization, SPI interface, and 8-SOIC package. The AT25DF512C-SSHN-T operates at higher clock frequency (104 MHz vs. 70 MHz) and faster write cycles, with extended supply voltage range (1.65V ~ 3.6V vs. 2.7V ~ 3.6V). The part is ROHS3 compliant and in active production status.

Q: What is the difference between AT25DN512C and AT25DF512C series?

A: Both series maintain identical memory capacity and organization. The AT25DN512C series features faster page write cycles (1.75ms vs. 4.6ms) and operates within a narrower supply voltage range (2.3V ~ 3.6V vs. 1.65V ~ 3.6V). The AT25DF512C series supports lower minimum supply voltage.

Q: Does packaging format affect electrical compatibility?

A: No. Packaging format (Tape & Reel, Tube, or Cut Tape) affects only procurement and handling. Electrical and mechanical specifications remain identical across packaging variants of the same part number base.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant with unlimited moisture sensitivity level, providing improved environmental compliance compared to the obsolete AT25F512B-SSH-T.

Q: What is the minimum supply voltage for each substitute series?

A: AT25DF512C and AT25XE512C series support 1.65V minimum supply voltage. AT25DN512C series supports 2.3V minimum supply voltage. The original AT25F512B-SSH-T requires 2.7V minimum.

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