AT24CS16-SSHM-T Equivalent & Substitute Parts

Part Overview

The AT24CS16-SSHM-T is a 16Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface operation at 1 MHz clock frequency. This device is housed in an 8-SOIC package and operates across a wide supply voltage range of 1.7V to 5.5V with an operating temperature range of -40°C to 85°C. The part is currently in active product status with ROHS3 compliance and is suitable for applications requiring non-volatile serial memory with fast I2C communication.

Substitute parts are necessary when the original AT24CS16-SSHM-T is unavailable, when alternative packaging formats are required for manufacturing processes, or when design specifications allow for compatible alternatives with different performance characteristics or supply voltage ranges.

Key Parameters

Parameter	Value
Memory Size	16Kbit
Memory Organization	2K x 8
Memory Interface	I2C
Clock Frequency	1 MHz
Access Time	550 ns
Write Cycle Time	5ms
Voltage Supply Range	1.7V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the AT24CS16-SSHM-T is determined by the following critical parameters:

Primary Compatibility Criteria:

Memory Size: 16Kbit (mandatory match)
Memory Organization: 2K x 8 (mandatory match)
Memory Interface: I2C (mandatory match)
Package Type: 8-SOIC or 8-SOP-J (physically compatible)
Mounting Type: Surface Mount (mandatory match)

Secondary Compatibility Criteria:

Clock Frequency: 1 MHz (preferred) or 400 kHz (acceptable with reduced performance)
Voltage Supply Range: Must encompass or be compatible with 1.7V ~ 5.5V
Operating Temperature: Must support -40°C ~ 85°C minimum
RoHS Compliance: ROHS3 Compliant (preferred)

Substitute parts are grouped into two categories: direct 1 MHz I2C alternatives and 400 kHz I2C alternatives. Parts operating at 400 kHz are functionally compatible but operate at reduced clock speed. Package variations (8-SOIC versus 8-SOP-J) are mechanically compatible with standard PCB footprints designed for 8-pin surface mount packages.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Operating Temp	Package	Inventory
AT24CS16-SSHM-T	Microchip Technology	16Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	4013 Pcs
24AA16-I/SN	Microchip Technology	16Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	1651 Pcs
24AA16H-I/SN	Microchip Technology	16Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	1706 Pcs
24AA16T-I/SN	Microchip Technology	16Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	13300 Pcs
BR24A16F-WLBH2	Rohm Semiconductor	16Kbit	400 kHz	Not specified	2.5V ~ 5.5V	-40°C ~ 105°C	8-SOP	1950 Pcs
BR24A16F-WME2	Rohm Semiconductor	16Kbit	400 kHz	Not specified	2.5V ~ 5.5V	-40°C ~ 105°C	8-SOP	4622 Pcs
BR24A16FJ-WME2	Rohm Semiconductor	16Kbit	400 kHz	Not specified	2.5V ~ 5.5V	-40°C ~ 105°C	8-SOP-J	2674 Pcs
BR24G16FJ-3AGTE2	Rohm Semiconductor	16Kbit	1 MHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-SOP-J	5215 Pcs
BR24G16FJ-3GTE2	Rohm Semiconductor	16Kbit	400 kHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-SOP-J	25200 Pcs
BR24L16F-WE2	Rohm Semiconductor	16Kbit	400 kHz	Not specified	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOP	60400 Pcs
BR24L16FJ-WE2	Rohm Semiconductor	16Kbit	400 kHz	Not specified	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOP-J	25673 Pcs

Engineering Selection Recommendations

Direct 1 MHz Substitutes (Matched Clock Frequency):

BR24G16FJ-3AGTE2 from Rohm Semiconductor operates at 1 MHz clock frequency matching the AT24CS16-SSHM-T performance specification. This part is housed in an 8-SOP-J package, mechanically compatible with standard 8-pin surface mount footprints. The supply voltage range of 1.6V to 5.5V encompasses the original specification. Operating temperature range of -40°C to 85°C matches the original part. This substitute is suitable for applications where clock frequency performance is critical.

400 kHz Substitutes (Reduced Clock Frequency):

Microchip Technology 24AA16 series (24AA16-I/SN, 24AA16H-I/SN, 24AA16T-I/SN) operate at 400 kHz clock frequency with 900 ns access time. All three variants maintain the same 16Kbit memory organization, I2C interface, 8-SOIC package, and voltage/temperature specifications as the original part. These are suitable for applications where reduced clock frequency is acceptable. The 24AA16T-I/SN variant has the highest inventory availability at 13300 pieces.

Rohm Semiconductor BR24L16 series (BR24L16F-WE2 and BR24L16FJ-WE2) operate at 400 kHz with supply voltage range of 1.8V to 5.5V. The BR24L16F-WE2 in 8-SOP package has the highest inventory availability at 60400 pieces among all substitutes. Both variants maintain -40°C to 85°C operating temperature range.

Rohm Semiconductor BR24G16FJ-3GTE2 operates at 400 kHz in 8-SOP-J package with supply voltage range of 1.6V to 5.5V and 25200 pieces in stock. This part offers extended lower voltage operation compared to the original specification.

Compliance and Certification:

All listed substitute parts maintain ROHS3 compliance and REACH unaffected status consistent with the original AT24CS16-SSHM-T. Rohm Semiconductor BR24A16F-WME2 and BR24A16FJ-WME2 carry AEC-Q100 automotive qualification, suitable for automotive applications requiring additional reliability certification.

Frequently Asked Questions (FAQ)

Q: Can I use a 400 kHz I2C EEPROM as a direct substitute for the 1 MHz AT24CS16-SSHM-T?

A: Yes, 400 kHz parts are functionally compatible as direct substitutes. The I2C protocol supports multiple clock frequencies, and devices operating at 400 kHz will operate correctly in systems designed for 1 MHz operation, though at reduced communication speed. System timing margins must accommodate the slower access time (900 ns versus 550 ns).

Q: What is the difference between 8-SOIC and 8-SOP-J packages?

A: Both are 8-pin surface mount packages with compatible PCB footprints. 8-SOIC (Small Outline Integrated Circuit) has a body width of 0.154 inches (3.90mm). 8-SOP-J (Small Outline Package-J) has a body width of 0.154 inches (3.90mm) for the -J variant. These packages are mechanically interchangeable on standard PCB layouts designed for 8-pin surface mount components.

Q: Are there voltage supply differences between the original part and substitutes?

A: The original AT24CS16-SSHM-T operates from 1.7V to 5.5V. Most Microchip 24AA16 substitutes maintain this range. Rohm BR24A16 series operates from 2.5V to 5.5V (narrower range). Rohm BR24L16 and BR24G16 series operate from 1.8V and 1.6V respectively, offering extended lower voltage operation. Select substitutes based on your system's minimum supply voltage requirement.

Q: Which substitute has the best inventory availability?

A: BR24L16F-WE2 from Rohm Semiconductor has the highest inventory at 60400 pieces. This 400 kHz variant in 8-SOP package is suitable for applications where reduced clock frequency is acceptable and extended lower voltage operation (1.8V minimum) is not required.

Q: Can I use automotive-qualified parts in non-automotive applications?

A: Yes. Automotive-qualified parts (BR24A16F-WME2 and BR24A16FJ-WME2 with AEC-Q100 certification) meet higher reliability standards and can be used in non-automotive applications. These parts are suitable when additional reliability margin is desired.

Q: What is the impact of 900 ns access time versus 550 ns on system performance?

A: The 400 kHz substitutes have 900 ns access time compared to the original 550 ns specification. This affects I2C read cycle timing. Systems with tight timing constraints or high-frequency I2C polling may require evaluation. Most standard I2C applications accommodate this difference without modification.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message