AT88SC0404CA-SH Equivalent & Substitute Parts

Part Overview

The AT88SC0404CA-SH is a Secure Memory IC manufactured by Microchip Technology, classified as a CryptoMemory® series component in 8-SOIC surface mount packaging. This part is designed for embedded and smart card applications requiring secure memory functionality. The device is Active status with 1794 units in stock inventory.

Substitute parts are necessary when the original AT88SC0404CA-SH becomes unavailable, when alternative packaging or thermal specifications are required, or when design requirements shift to standard EEPROM memory interfaces while maintaining 4Kbit capacity and 8-SOIC form factor compatibility.

Key Parameters

Parameter	AT88SC0404CA-SH
Manufacturer	Microchip Technology
Product Type	Secure Memory
Series	CryptoMemory®
Memory Size	4Kbit
Memory Organization	512 x 8
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Packaging Format	Tube
Product Status	Active
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution of the AT88SC0404CA-SH is based on the following critical parameters that must align with the original part:

Mandatory Matching Parameters:

Memory Size: 4Kbit capacity
Memory Organization: 512 x 8 configuration
Package / Case: 8-SOIC (0.154", 3.90mm Width) form factor
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
REACH Status: REACH Unaffected

Allowable Variation Parameters:

Memory Interface: Original uses secure memory protocol; substitutes may use I2C interface
Clock Frequency: Varies between 400 kHz and 1 MHz
Access Time: Ranges from 450 ns to 900 ns
Voltage Supply Range: Varies by manufacturer (1.6V to 5.5V)
Operating Temperature: Standard -40°C to 85°C or extended to 125°C
Write Cycle Time: 4ms to 5ms
Packaging Format: Tube, Tape & Reel, or Bulk
Moisture Sensitivity Level: 1 (Unlimited) or 3 (168 Hours)

The substitute parts listed below maintain the 4Kbit capacity and 8-SOIC package while offering EEPROM memory with I2C interface compatibility. These parts are functionally equivalent for applications where secure memory features are not required and standard EEPROM access is acceptable.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Memory Interface	Clock Frequency	Access Time	Voltage Supply	Operating Temp	Package	MSL	Product Status
AT88SC0404CA-SH	Microchip Technology	4Kbit	Secure Memory	N/A	N/A	N/A	N/A	8-SOIC	1	Active
AT24C04D-SSHM-B	Microchip Technology	4Kbit	I2C	1 MHz	450 ns	1.7V ~ 3.6V	-40°C ~ 85°C	8-SOIC	3	Active
AT24CS04-SSHM-T	Microchip Technology	4Kbit	I2C	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	1	Active
AT24HC04BN-SH-B	Microchip Technology	4Kbit	I2C	1 MHz	550 ns	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	1	Active
BR24G04FJ-3GTE2	Rohm Semiconductor	4Kbit	I2C	400 kHz	N/A	1.6V ~ 5.5V	-40°C ~ 85°C	8-SOIC	1	Active
BR24T04FJ-WE2	Rohm Semiconductor	4Kbit	I2C	400 kHz	N/A	1.6V ~ 5.5V	-40°C ~ 85°C	8-SOIC	1	Active
CAT24C04WI-G	Catalyst Semiconductor Inc.	4Kbit	I2C	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	3	Active
CAV24C04WE-GT3	onsemi	4Kbit	I2C	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 125°C	8-SOIC	1	Active
FT24C04A-USG-B	Fremont Micro Devices Ltd	4Kbit	I2C	1 MHz	550 ns	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	1	Active
FT24C04A-USR-B	Fremont Micro Devices Ltd	4Kbit	I2C	1 MHz	550 ns	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	1	Active
M24C04-DRMN3TP/K	STMicroelectronics	4Kbit	I2C	1 MHz	450 ns	1.7V ~ 5.5V	-40°C ~ 125°C	8-SOIC	1	Active

Engineering Selection Recommendations

All substitute parts listed maintain Active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment with the original AT88SC0404CA-SH.

For Direct Replacement with Microchip Technology: AT24CS04-SSHM-T and AT24HC04BN-SH-B are Microchip-manufactured alternatives with MSL 1 (Unlimited) rating, matching the original part's moisture sensitivity specification. Both support 1 MHz I2C operation and -40°C to 85°C temperature range.

For Extended Temperature Range Applications: M24C04-DRMN3TP/K (STMicroelectronics) and CAV24C04WE-GT3 (onsemi) extend operating temperature to -40°C to 125°C. M24C04-DRMN3TP/K includes AEC-Q100 automotive qualification. CAV24C04WE-GT3 is AEC-Q100 qualified for automotive-grade applications.

For Wide Voltage Supply Range: AT24CS04-SSHM-T, BR24G04FJ-3GTE2, BR24T04FJ-WE2, CAT24C04WI-G, and M24C04-DRMN3TP/K support 1.6V to 5.5V or 1.7V to 5.5V supply voltage ranges, accommodating diverse power supply architectures.

For Lower Clock Frequency Applications: BR24G04FJ-3GTE2, BR24T04FJ-WE2, and CAT24C04WI-G operate at 400 kHz I2C frequency, suitable for noise-sensitive or long-distance I2C bus implementations.

For High-Speed I2C Requirements: AT24C04D-SSHM-B, AT24CS04-SSHM-T, AT24HC04BN-SH-B, FT24C04A-USG-B, FT24C04A-USR-B, and M24C04-DRMN3TP/K support 1 MHz I2C clock frequency with access times of 450 ns to 550 ns.

Frequently Asked Questions (FAQ)

Q: Can AT88SC0404CA-SH be directly replaced with standard EEPROM parts?

A: The AT88SC0404CA-SH is a secure memory device with cryptographic capabilities. Standard EEPROM substitutes (AT24C04, M24C04, BR24G04, CAT24C04, CAV24C04, FT24C04) provide 4Kbit I2C EEPROM functionality but do not include secure memory or cryptographic features. Substitution is valid only when secure memory functionality is not required by the application.

Q: What is the significance of MSL (Moisture Sensitivity Level) in part selection?

A: MSL 1 (Unlimited) indicates the part can be stored indefinitely without moisture baking requirements. MSL 3 (168 Hours) requires moisture baking within 168 hours of package opening. For applications with extended storage or high-humidity environments, MSL 1 parts (AT24CS04-SSHM-T, AT24HC04BN-SH-B, BR24G04FJ-3GTE2, BR24T04FJ-WE2, CAV24C04WE-GT3, FT24C04A-USG-B, FT24C04A-USR-B, M24C04-DRMN3TP/K) are preferred.

Q: Are all substitute parts compatible with 8-SOIC package footprints?

A: All listed substitute parts use 8-SOIC (0.154", 3.90mm Width) packaging, ensuring PCB footprint compatibility with the original AT88SC0404CA-SH. However, some parts specify 8-SOP-J as the supplier device package designation. Verify with the manufacturer that 8-SOP-J is mechanically and electrically equivalent to 8-SOIC for your specific application.

Q: What is the difference between 1 MHz and 400 kHz I2C clock frequency?

A: 1 MHz I2C operation (AT24C04D-SSHM-B, AT24CS04-SSHM-T, AT24HC04BN-SH-B, FT24C04A-USG-B, FT24C04A-USR-B, M24C04-DRMN3TP/K) provides faster data transfer rates and shorter access times (450 ns to 550 ns). 400 kHz operation (BR24G04FJ-3GTE2, BR24T04FJ-WE2, CAT24C04WI-G, CAV24C04WE-GT3) is standard I2C frequency with longer access times (900 ns). Selection depends on system I2C bus speed requirements and timing constraints.

Q: Which substitute parts are qualified for automotive applications?

A: M24C04-DRMN3TP/K (STMicroelectronics) and CAV24C04WE-GT3 (onsemi) carry AEC-Q100 automotive qualification and support extended operating temperature range (-40°C to 125°C). These parts are suitable for automotive-grade designs requiring reliability and temperature performance specifications.

Q: What voltage supply range should I select?

A: The original AT88SC0404CA-SH does not specify voltage supply parameters. Substitute selection depends on system power supply architecture. Parts supporting 1.6V to 5.5V (BR24G04FJ-3GTE2, BR24T04FJ-WE2) offer maximum flexibility. Parts with 1.7V to 5.5V (AT24CS04-SSHM-T, CAT24C04WI-G, M24C04-DRMN3TP/K) are suitable for most 3.3V and 5V systems. Parts with 1.8V to 5.5V (AT24HC04BN-SH-B, FT24C04A-USG-B, FT24C04A-USR-B) are appropriate for 3.3V systems. AT24C04D-SSHM-B with 1.7V to 3.6V range is limited to 3.3V systems.

Q: Is packaging format (Tube, Tape & Reel, Bulk) important for substitution?

A: Packaging format affects handling, storage, and assembly processes but does not impact electrical or mechanical compatibility. The original AT88SC0404CA-SH is supplied in Tube format. Substitutes are available in Tube, Tape & Reel (TR), Cut Tape (CT), or Bulk formats. Select packaging based on production volume and assembly equipment compatibility.

Q: What is the write cycle time specification?

A: Write cycle time indicates the duration required to complete a single word or page write operation. All listed substitutes specify 4ms to 5ms write cycle time, which is consistent with 4Kbit EEPROM devices. This parameter does not differentiate substitution suitability.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message