AT88SC0404CA-SH-T Equivalent & Substitute Parts

Part Overview

The AT88SC0404CA-SH-T is a Secure Memory IC manufactured by Microchip Technology in the CryptoMemory® series. This 8-SOIC surface mount device provides secure memory functionality for embedded and smart card applications. The part is active and RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Substitute parts are necessary when the original AT88SC0404CA-SH-T is unavailable, when alternative supply chain sources are required, or when design requirements permit functional equivalents with compatible electrical and mechanical parameters. The substitute parts listed below maintain compatibility through matching memory organization, interface protocols, package specifications, and operating characteristics.

Key Parameters

Parameter	AT88SC0404CA-SH-T
Manufacturer	Microchip Technology
Series	CryptoMemory®
Memory Type	Secure Memory
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Memory Organization	512 x 8
Memory Interface	I2C
Operating Temperature	-40°C ~ 85°C (TA)
RoHS Status	RoHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Part Status	Active

Substitute Part Grouping Explanation

Substitution compatibility for the AT88SC0404CA-SH-T is determined by the following critical parameters:

Primary Compatibility Criteria:

Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Memory Organization: 512 x 8
Memory Interface: I2C
Operating Temperature Range: -40°C ~ 85°C minimum
RoHS3 Compliance
MSL Rating: 1 (Unlimited) or equivalent

Secondary Compatibility Factors:

Memory Size: 4Kbit
Memory Format: EEPROM or Secure Memory
Part Status: Active

The substitute parts listed are EEPROM memory ICs that share the same 8-SOIC package, I2C interface, 512 x 8 memory organization, and operating temperature range. While the AT88SC0404CA-SH-T is a secure memory device and the substitutes are standard EEPROM devices, they maintain electrical and mechanical compatibility for applications where secure memory features are not required or where functional equivalence is acceptable.

Parameter Comparison

Part Number	Manufacturer	Memory Type	Memory Size	Memory Interface	Clock Frequency	Package / Case	Operating Temperature	Voltage Supply	RoHS Status	MSL	Part Status
AT88SC0404CA-SH-T	Microchip Technology	Secure Memory	4Kbit	I2C	N/A	8-SOIC	-40°C ~ 85°C	N/A	RoHS3	1	Active
AT24C04D-SSHM-T	Microchip Technology	EEPROM	4Kbit	I2C	1 MHz	8-SOIC	-40°C ~ 85°C	1.7V ~ 3.6V	RoHS3	1	Active
AT24CS04-SSHM-T	Microchip Technology	EEPROM	4Kbit	I2C	1 MHz	8-SOIC	-40°C ~ 85°C	1.7V ~ 5.5V	RoHS3	1	Active
AT24HC04BN-SH-T	Microchip Technology	EEPROM	4Kbit	I2C	1 MHz	8-SOIC	-40°C ~ 85°C	1.8V ~ 5.5V	RoHS3	3	Active
BR24G04FJ-3GTE2	Rohm Semiconductor	EEPROM	4Kbit	I2C	400 kHz	8-SOIC	-40°C ~ 85°C	1.6V ~ 5.5V	RoHS3	1	Active
BR24T04FJ-WE2	Rohm Semiconductor	EEPROM	4Kbit	I2C	400 kHz	8-SOIC	-40°C ~ 85°C	1.6V ~ 5.5V	RoHS3	1	Active
CAT24C04WI-GT3	Catalyst Semiconductor Inc.	EEPROM	4Kbit	I2C	N/A	N/A	N/A	N/A	N/A	1	Active
CAV24C04WE-GT3	onsemi	EEPROM	4Kbit	I2C	400 kHz	8-SOIC	-40°C ~ 125°C	2.5V ~ 5.5V	RoHS3	1	Active
M24C04-DRMN3TP/K	STMicroelectronics	EEPROM	4Kbit	I2C	1 MHz	8-SOIC	-40°C ~ 125°C	1.7V ~ 5.5V	RoHS3	1	Active
M24C04-DRMN8TP/K	STMicroelectronics	EEPROM	4Kbit	I2C	1 MHz	8-SOIC	-40°C ~ 105°C	1.8V ~ 5.5V	RoHS3	1	Active
M24C04-FMN6TP	STMicroelectronics	EEPROM	4Kbit	I2C	400 kHz	8-SOIC	-40°C ~ 85°C	1.7V ~ 5.5V	RoHS3	1	Active

Engineering Selection Recommendations

All listed substitute parts are active products with RoHS3 compliance and MSL 1 rating, matching the environmental and regulatory status of the AT88SC0404CA-SH-T. Selection among substitutes should be based on the following factors:

Microchip Technology Substitutes (AT24C04D-SSHM-T, AT24CS04-SSHM-T, AT24HC04BN-SH-T): These parts maintain manufacturer continuity with the original device. AT24C04D-SSHM-T and AT24CS04-SSHM-T both feature 1 MHz clock frequency and MSL 1 rating. AT24HC04BN-SH-T offers extended voltage supply range (1.8V ~ 5.5V) but carries MSL 3 rating.

STMicroelectronics Substitutes (M24C04-DRMN3TP/K, M24C04-DRMN8TP/K, M24C04-FMN6TP): These parts provide automotive-grade qualification (AEC-Q100) with extended operating temperature ranges. M24C04-DRMN3TP/K and M24C04-DRMN8TP/K support 1 MHz operation. M24C04-FMN6TP operates at 400 kHz with verified programmability status.

Rohm Semiconductor Substitutes (BR24G04FJ-3GTE2, BR24T04FJ-WE2): Both parts operate at 400 kHz with wide voltage supply range (1.6V ~ 5.5V) and MSL 1 rating. These are functionally equivalent alternatives with high inventory availability.

onsemi Substitute (CAV24C04WE-GT3): This part includes automotive-grade qualification (AEC-Q100) with extended operating temperature range (-40°C ~ 125°C) and is suitable for automotive applications.

Catalyst Semiconductor Substitute (CAT24C04WI-GT3): Limited technical parameter data available; use only when other substitutes are unavailable.

Frequently Asked Questions (FAQ)

Q: Can the AT88SC0404CA-SH-T be directly replaced with any of the listed EEPROM substitutes?

A: The listed EEPROM parts share the same 8-SOIC package, I2C interface, 4Kbit memory organization, and operating temperature range. Direct replacement is mechanically and electrically compatible. However, the AT88SC0404CA-SH-T is a secure memory device with cryptographic capabilities, while the substitutes are standard EEPROM devices. Replacement is appropriate only when secure memory features are not required by the application.

Q: What is the significance of the MSL rating difference between AT24HC04BN-SH-T (MSL 3) and other substitutes (MSL 1)?

A: MSL 1 indicates unlimited shelf life and moisture sensitivity, while MSL 3 requires controlled storage conditions with a maximum floor life of 168 hours after moisture exposure. For applications with standard storage and handling practices, MSL 1 parts are preferred. MSL 3 parts require additional moisture control during assembly.

Q: Are there differences in clock frequency among the substitutes?

A: Yes. Microchip AT24C04D-SSHM-T, AT24CS04-SSHM-T, and STMicroelectronics M24C04-DRMN3TP/K and M24C04-DRMN8TP/K operate at 1 MHz. Rohm BR24G04FJ-3GTE2, BR24T04FJ-WE2, STMicroelectronics M24C04-FMN6TP, and onsemi CAV24C04WE-GT3 operate at 400 kHz. The 1 MHz parts provide faster access times (450 ns) compared to 400 kHz parts (900 ns). Selection depends on application timing requirements.

Q: Which substitutes are suitable for automotive applications?

A: STMicroelectronics M24C04-DRMN3TP/K, M24C04-DRMN8TP/K, and onsemi CAV24C04WE-GT3 carry automotive-grade qualification (AEC-Q100). These parts are qualified for automotive temperature and reliability requirements.

Q: What is the difference between AT24C04D-SSHM-T and AT24CS04-SSHM-T?

A: Both parts are Microchip EEPROM devices with 4Kbit capacity and 1 MHz operation. AT24C04D-SSHM-T supports voltage supply 1.7V ~ 3.6V with 450 ns access time. AT24CS04-SSHM-T supports wider voltage supply 1.7V ~ 5.5V with 550 ns access time. Selection depends on system voltage requirements and timing constraints.

Q: Are all substitutes available in the same packaging options as the original part?

A: All substitutes use the 8-SOIC package matching the AT88SC0404CA-SH-T. However, packaging formats (Cut Tape vs. Tape & Reel) vary by part number. Verify specific packaging availability with your supplier for your procurement requirements.

Q: What is the write cycle time for these memory devices?

A: Most substitutes specify 4ms to 5ms write cycle time for word or page operations. STMicroelectronics M24C04-DRMN3TP/K and M24C04-DRMN8TP/K specify 4ms, while other parts specify 5ms. This parameter affects programming speed during device initialization and data storage operations.

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