AT24CS04-XHM-B Equivalent & Substitute Parts

Part Overview

The AT24CS04-XHM-B is a 4Kbit EEPROM memory IC with I2C interface manufactured by Microchip Technology. This non-volatile memory device operates at 1 MHz clock frequency with 550 ns access time, housed in an 8-TSSOP surface mount package. The part is currently active in production and RoHS3 compliant.

Substitute parts are necessary when the primary part experiences supply constraints, extended lead times, or when design requirements allow for alternative manufacturers meeting equivalent electrical and mechanical specifications.

Key Parameters

Parameter	Value
Memory Size	4Kbit
Memory Organization	512 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-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the AT24CS04-XHM-B is determined by the following critical parameters:

Memory capacity: 4Kbit with 512 x 8 organization
Interface protocol: I2C communication standard
Package footprint: 8-TSSOP form factor with identical pin configuration
Supply voltage range: Minimum 1.7V to 5.5V maximum
Operating temperature range: -40°C to 85°C minimum
RoHS3 compliance status

The identified substitute parts maintain these core specifications. Variations in clock frequency (1 MHz vs. 400 kHz) and access time (550 ns vs. 900 ns) represent performance differences within acceptable tolerance for I2C EEPROM applications, as the I2C protocol accommodates multiple clock speeds and the slower access times remain within typical system timing budgets.

Parameter Comparison

Parameter	AT24CS04-XHM-B	AT24C04C-XHM-B	CAV24C04YE-GT3	M24C04-WDW6TP
Manufacturer	Microchip Technology	Microchip Technology	onsemi	STMicroelectronics
Memory Size	4Kbit	4Kbit	4Kbit	4Kbit
Memory Organization	512 x 8	512 x 8	512 x 8	512 x 8
Memory Interface	I2C	I2C	I2C	I2C
Clock Frequency	1 MHz	1 MHz	400 kHz	400 kHz
Access Time	550 ns	550 ns	900 ns	900 ns
Write Cycle Time	5ms	5ms	5ms	5ms
Voltage Supply Range	1.7V ~ 5.5V	1.7V ~ 5.5V	2.5V ~ 5.5V	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C
Package Type	8-TSSOP	8-TSSOP	8-TSSOP	8-TSSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Not For New Designs

Engineering Selection Recommendations

AT24C04C-XHM-B (Microchip Technology) is the primary parametric equivalent, offering identical electrical performance and supply voltage range as the AT24CS04-XHM-B. Both parts are active products from the same manufacturer with matching clock frequency and access time specifications.

CAV24C04YE-GT3 (onsemi) provides functional equivalence with AEC-Q100 automotive qualification and extended operating temperature range to 125°C. This part operates at 400 kHz clock frequency with 900 ns access time, representing reduced performance but maintaining I2C protocol compatibility. The supply voltage range is restricted to 2.5V minimum. This part is suitable for applications requiring automotive-grade components.

M24C04-WDW6TP (STMicroelectronics) is marked as "Not For New Designs" and carries the same performance reduction as the onsemi part (400 kHz, 900 ns access time). This part should be used only for legacy system maintenance or when existing designs have validated this component.

For new designs requiring the AT24CS04-XHM-B, AT24C04C-XHM-B is the recommended substitute. For automotive applications, CAV24C04YE-GT3 is appropriate. The M24C04-WDW6TP should be avoided for new designs.

Frequently Asked Questions (FAQ)

Q: Can AT24C04C-XHM-B directly replace AT24CS04-XHM-B in existing designs?

A: Yes. Both parts share identical memory capacity, organization, interface protocol, clock frequency, access time, supply voltage range, operating temperature range, and 8-TSSOP package footprint. No design modifications are required.

Q: What are the performance differences between 1 MHz and 400 kHz clock frequency variants?

A: The 1 MHz variants (AT24CS04-XHM-B and AT24C04C-XHM-B) support faster I2C communication with 550 ns access time. The 400 kHz variants (CAV24C04YE-GT3 and M24C04-WDW6TP) operate at reduced speed with 900 ns access time. Both frequencies are standard I2C speeds; the selection depends on system timing requirements.

Q: Are there supply voltage compatibility concerns with CAV24C04YE-GT3?

A: Yes. CAV24C04YE-GT3 requires minimum 2.5V supply voltage, whereas AT24CS04-XHM-B operates from 1.7V minimum. Systems designed for 1.7V to 2.4V operation cannot use the onsemi part without supply voltage modification.

Q: Why is M24C04-WDW6TP marked "Not For New Designs"?

A: This designation indicates the manufacturer has discontinued active development and recommends alternative parts for new applications. Existing designs using this part may continue, but new designs should select active products such as AT24C04C-XHM-B or CAV24C04YE-GT3.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance status, matching the primary part specification.

Q: What is the significance of the 8-TSSOP package specification?

A: The 8-TSSOP package defines the physical footprint, pin count, and spacing. All substitute parts use identical 8-TSSOP packaging with 0.173" width and 4.40mm dimensions, ensuring PCB layout compatibility without redesign.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message