AT24CS16-XHM-T Equivalent & Substitute Parts

Part Overview

The AT24CS16-XHM-T is a 16Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface operation at 1 MHz with 550 ns access time. The device is packaged in 8-TSSOP surface mount configuration and operates across a wide voltage range of 1.7V to 5.5V with temperature range of -40°C to 85°C. This part is currently in active production status with ROHS3 compliance and is suitable for applications requiring non-volatile serial memory storage.

Substitute parts are necessary when the original part becomes unavailable, when alternative packaging formats are required, or when design flexibility demands components from different manufacturers while maintaining functional compatibility.

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-TSSOP
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the AT24CS16-XHM-T is determined by the following critical parameters:

Core Functional Requirements:

Memory Size: 16Kbit (mandatory match)
Memory Organization: 2K x 8 (mandatory match)
Memory Interface: I2C (mandatory match)
Package Type: 8-TSSOP (mandatory match)
Mounting Type: Surface Mount (mandatory match)

Performance Compatibility Parameters:

Clock Frequency: 1 MHz (primary specification) or 400 kHz (reduced speed, backward compatible)
Access Time: 550 ns (primary) or 900 ns (reduced speed, backward compatible)
Write Cycle Time: 5ms or 4ms (acceptable variation)

Electrical Compatibility Parameters:

Voltage Supply Range: Must encompass or be compatible with 1.7V ~ 5.5V
Operating Temperature: Must support -40°C ~ 85°C minimum

Compliance Requirements:

RoHS Status: ROHS3 Compliant (mandatory)
REACH Status: REACH Unaffected (mandatory)

Substitute parts are grouped into two categories: parametric equivalents (matching 1 MHz operation) and manufacturer-recommended alternatives (400 kHz operation with extended access time).

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Write Cycle Time	Voltage Supply	Operating Temp	Package	RoHS Status
AT24CS16-XHM-T	Microchip Technology	16Kbit	1 MHz	550 ns	5ms	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	ROHS3
AT24C16C-XHM-T	Microchip Technology	16Kbit	1 MHz	550 ns	5ms	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	ROHS3
24AA16H-I/ST	Microchip Technology	16Kbit	400 kHz	900 ns	5ms	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	ROHS3
24AA16T-I/ST	Microchip Technology	16Kbit	400 kHz	900 ns	5ms	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	ROHS3
BR24G16FVT-3GE2	Rohm Semiconductor	16Kbit	400 kHz	Not specified	5ms	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	ROHS3
BR24T16FVT-WE2	Rohm Semiconductor	16Kbit	400 kHz	Not specified	5ms	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	ROHS3
CAT24C16YI-GT3	onsemi	16Kbit	400 kHz	900 ns	5ms	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	ROHS3
CAV24C16YE-GT3	onsemi	16Kbit	400 kHz	900 ns	5ms	2.5V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	ROHS3
M24C16-DRDW8TP/K	STMicroelectronics	16Kbit	1 MHz	450 ns	4ms	1.7V ~ 5.5V	-40°C ~ 105°C	8-TSSOP	ROHS3
M24C16-FDW6TP	STMicroelectronics	16Kbit	400 kHz	900 ns	5ms	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	ROHS3
M24C16-RDW6TP	STMicroelectronics	16Kbit	400 kHz	900 ns	5ms	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	ROHS3

Engineering Selection Recommendations

Parametric Equivalent (Direct Replacement): AT24C16C-XHM-T from Microchip Technology provides identical electrical and timing specifications to the AT24CS16-XHM-T, with matching 1 MHz clock frequency and 550 ns access time. This part maintains full functional compatibility and is suitable for direct substitution in existing designs.

M24C16-DRDW8TP/K from STMicroelectronics operates at 1 MHz with 450 ns access time (faster than original specification) and extends operating temperature to 105°C. This part includes AEC-Q100 automotive qualification and is suitable for applications requiring enhanced temperature performance.

Manufacturer-Recommended Alternatives (400 kHz Operation): 24AA16H-I/ST and 24AA16T-I/ST from Microchip Technology operate at reduced clock frequency of 400 kHz with 900 ns access time. Both parts maintain voltage and temperature compatibility with the original specification. The 24AA16T-I/ST variant includes DiGi-Electronics Programmable verification status.

BR24G16FVT-3GE2 and BR24T16FVT-WE2 from Rohm Semiconductor operate at 400 kHz with minimum voltage supply of 1.6V. Both parts maintain ROHS3 compliance and are available in high inventory quantities.

CAT24C16YI-GT3 from onsemi operates at 400 kHz with 900 ns access time and voltage range of 1.7V to 5.5V, matching the original supply voltage specification.

CAV24C16YE-GT3 from onsemi is an automotive-grade variant with AEC-Q100 qualification, extended operating temperature to 125°C, and minimum voltage supply of 2.5V. This part is suitable for automotive applications requiring enhanced temperature performance.

M24C16-FDW6TP and M24C16-RDW6TP from STMicroelectronics operate at 400 kHz with 900 ns access time. M24C16-RDW6TP specifies minimum voltage supply of 1.8V.

All substitute parts maintain 8-TSSOP surface mount packaging, ROHS3 compliance, and REACH unaffected status.

Frequently Asked Questions (FAQ)

Q: Can I use a 400 kHz part as a substitute for the 1 MHz AT24CS16-XHM-T? A: Yes. The 400 kHz parts operate at reduced clock frequency but maintain full functional compatibility. The I2C interface supports both 400 kHz and 1 MHz operation modes. Applications designed for 1 MHz operation will function correctly with 400 kHz parts, though at reduced data transfer rates.

Q: What is the difference between the AT24CS16-XHM-T and AT24C16C-XHM-T? A: Both parts are parametric equivalents with identical electrical specifications, timing characteristics, voltage range, and temperature range. The primary difference is the base product number designation (AT24CS16 versus AT24C16C). Both are suitable for direct substitution.

Q: Are the Rohm Semiconductor BR24G16FVT-3GE2 and BR24T16FVT-WE2 interchangeable? A: Both parts share identical electrical specifications, clock frequency (400 kHz), voltage range (1.6V to 5.5V), and temperature range (-40°C to 85°C). The primary difference is the base product number. Both are suitable for substitution in applications compatible with 400 kHz operation.

Q: What is the significance of the CAV24C16YE-GT3 automotive qualification? A: The CAV24C16YE-GT3 includes AEC-Q100 automotive qualification and extends operating temperature to 125°C. This part is suitable for automotive applications requiring enhanced temperature performance. The minimum voltage supply is 2.5V, which differs from the original 1.7V specification.

Q: Can I substitute M24C16-DRDW8TP/K for the AT24CS16-XHM-T in all applications? A: M24C16-DRDW8TP/K is a parametric equivalent with 1 MHz operation and faster access time (450 ns versus 550 ns). It includes AEC-Q100 automotive qualification and extends operating temperature to 105°C. This part is suitable for direct substitution and offers enhanced performance characteristics.

Q: What packaging formats are available for 16Kbit I2C EEPROM substitutes? A: All listed substitute parts maintain 8-TSSOP surface mount packaging identical to the AT24CS16-XHM-T. Packaging variations include Tape & Reel (TR), Tube, and Cut Tape (CT) & Digi-Reel® formats, which represent different distribution methods rather than physical package differences.

Q: Are all substitute parts RoHS compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the environmental compliance requirements of the original AT24CS16-XHM-T.

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