Equivalent & Substitute Parts for AT24C08BN-SH-T

Part Overview

The AT24C08BN-SH-T is an 8Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface operation at 1 MHz with 550 ns access time in an 8-SOIC package. This part is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility across memory capacity, interface protocol, and electrical operating parameters while accommodating variations in clock frequency, voltage supply ranges, and thermal specifications.

Key Parameters

Parameter	Value
Memory Size	8Kbit
Memory Organization	1K x 8
Memory Interface	I2C
Clock Frequency	1 MHz
Access Time	550 ns
Write Cycle Time	5ms
Voltage Supply Range	1.8V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	8-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following mandatory criteria:

Core Compatibility Requirements:

Memory Size: 8Kbit (non-negotiable)
Memory Interface: I2C (non-negotiable)
Package Type: 8-SOIC or equivalent footprint (0.154", 3.90mm Width)
Write Cycle Time: 5ms (standard across all candidates)
Operating Temperature Range: -40°C ~ 85°C minimum
RoHS3 Compliance: Required

Allowable Parameter Variations:

Clock Frequency: 400 kHz or 1 MHz (both support I2C standard operation)
Access Time: 550 ns (1 MHz) or 900 ns (400 kHz) based on clock frequency
Voltage Supply Range: Minimum 1.6V to 1.8V; Maximum 5.5V (all candidates support 5.5V upper limit)
Memory Organization: 1K x 8 or 256 x 8 x 4 (functionally equivalent for 8Kbit capacity)

Substitute parts are grouped into two functional categories based on clock frequency performance: 1 MHz operation (direct speed match) and 400 kHz operation (reduced speed, compatible with I2C standard).

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Operating Temp	Package	Product Status
AT24C08BN-SH-T	Microchip Technology	8Kbit	1 MHz	550 ns	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Obsolete
AT24C08C-SSHM-T	Microchip Technology	8Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
24AA08T-I/SN	Microchip Technology	8Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
AT24CS08-SSHM-T	Microchip Technology	8Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
BR24A08F-WME2	Rohm Semiconductor	8Kbit	400 kHz	Not specified	2.5V ~ 5.5V	-40°C ~ 105°C	8-SOP	Active
BR24G08FJ-3AGTE2	Rohm Semiconductor	8Kbit	1 MHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-SOP-J	Active
BR24G08FJ-3GTE2	Rohm Semiconductor	8Kbit	400 kHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-SOP-J	Active
BR24L08FJ-WE2	Rohm Semiconductor	8Kbit	400 kHz	Not specified	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOP-J	Active
BR24S08FJ-WE2	Rohm Semiconductor	8Kbit	400 kHz	Not specified	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOP-J	Active
BR24T08FJ-WE2	Rohm Semiconductor	8Kbit	400 kHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-SOP-J	Active
CAT24C08WI-GT3	onsemi	8Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active

Engineering Selection Recommendations

Primary Substitutes (1 MHz Operation - Direct Speed Match):

AT24C08C-SSHM-T and AT24CS08-SSHM-T are Microchip Technology active products offering identical 1 MHz clock frequency and 550 ns access time performance to the obsolete AT24C08BN-SH-T. Both maintain ROHS3 compliance and -40°C to 85°C operating temperature range. AT24C08C-SSHM-T features expanded voltage supply range (1.7V minimum) and higher inventory availability (100,100 units). AT24CS08-SSHM-T provides equivalent electrical performance with lower inventory levels (4,100 units). Both are packaged in 8-SOIC format with Cut Tape and Digi-Reel packaging options.

BR24G08FJ-3AGTE2 (Rohm Semiconductor) provides 1 MHz operation in 8-SOP-J package with extended voltage supply range (1.6V ~ 5.5V) and identical thermal specifications. This option is suitable for designs where package footprint compatibility with 8-SOP-J is acceptable.

Secondary Substitutes (400 kHz Operation - Reduced Speed):

24AA08T-I/SN (Microchip Technology), CAT24C08WI-GT3 (onsemi), BR24G08FJ-3GTE2, BR24L08FJ-WE2, BR24S08FJ-WE2, and BR24T08FJ-WE2 operate at 400 kHz with 900 ns access time. These parts are suitable for applications where reduced I2C bus speed is acceptable. CAT24C08WI-GT3 maintains 8-SOIC package compatibility with 65,200 units in stock. Rohm Semiconductor options (BR24G08FJ-3GTE2, BR24L08FJ-WE2, BR24S08FJ-WE2, BR24T08FJ-WE2) are available in 8-SOP-J package with varying voltage supply ranges (1.6V to 1.8V minimum).

BR24A08F-WME2 (Rohm Semiconductor) operates at 400 kHz with automotive-grade AEC-Q100 qualification and extended operating temperature range (-40°C ~ 105°C). Voltage supply range is restricted to 2.5V ~ 5.5V, limiting applicability to designs with higher minimum supply voltage requirements.

Compliance and Availability Considerations:

All substitute parts maintain ROHS3 compliance and REACH unaffected status. Microchip Technology products (AT24C08C-SSHM-T, 24AA08T-I/SN, AT24CS08-SSHM-T) offer verified programmability status. onsemi CAT24C08WI-GT3 provides verified programmability with highest inventory availability (65,200 units). Rohm Semiconductor parts are not verified for programmability through DiGi-Electronics.

Frequently Asked Questions (FAQ)

Q: Can AT24C08BN-SH-T be directly replaced with a 400 kHz substitute?

A: Yes, 400 kHz EEPROM substitutes are functionally compatible with the 1 MHz original part. I2C protocol supports both clock frequencies. Applications operating at reduced bus speed experience longer access times (900 ns versus 550 ns) but maintain full memory capacity and write cycle performance. System timing requirements must accommodate the slower access time specification.

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

A: Both packages are 8-pin surface mount configurations with identical pin counts and I2C signal assignments. 8-SOIC (0.154", 3.90mm width) and 8-SOP-J (0.154", 3.90mm width) share the same footprint dimensions. PCB layout compatibility is maintained across these package types. Verify specific package outline drawings with component datasheets for mechanical clearance validation.

Q: Are Rohm Semiconductor BR24 series parts pin-compatible with Microchip AT24 series?

A: Yes, all 8-pin EEPROM parts listed maintain identical I2C pin assignments and signal functionality. Pin-to-pin compatibility is confirmed across Microchip Technology, Rohm Semiconductor, and onsemi manufacturers. PCB redesign is not required for package substitution within the same footprint family.

Q: What voltage supply range should be selected for new designs?

A: For maximum design flexibility, select parts with 1.6V minimum supply voltage (BR24G08FJ-3AGTE2, BR24G08FJ-3GTE2, BR24T08FJ-WE2) or 1.7V minimum (AT24C08C-SSHM-T, 24AA08T-I/SN, AT24CS08-SSHM-T, CAT24C08WI-GT3, BR24S08FJ-WE2). All candidates support 5.5V maximum supply voltage. BR24A08F-WME2 requires minimum 2.5V supply and is suitable only for applications with higher supply voltage floors.

Q: Which substitute offers the best inventory availability?

A: CAT24C08WI-GT3 (onsemi) provides highest inventory availability at 65,200 units with verified programmability and 8-SOIC package compatibility. BR24G08FJ-3GTE2 (Rohm Semiconductor) offers 260,275 units at 400 kHz operation. AT24C08C-SSHM-T (Microchip Technology) provides 100,100 units at 1 MHz operation with Cut Tape and Digi-Reel packaging options.

Q: Is automotive-grade qualification required for this application?

A: BR24A08F-WME2 includes AEC-Q100 automotive qualification and extended operating temperature range (-40°C ~ 105°C). This part is specified for automotive applications requiring formal qualification documentation. Standard industrial-grade parts (all other candidates) are suitable for non-automotive applications within -40°C ~ 85°C operating range.

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