24FC16T-E/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24FC16T-E/ST is a 16Kbit I2C EEPROM memory integrated circuit manufactured by Microchip Technology. This non-volatile memory device operates at 1 MHz clock frequency with 450 ns access time and supports a supply voltage range of 1.7V to 5.5V. The device is housed in an 8-TSSOP surface mount package and maintains active product status with full RoHS3 compliance.

Substitute parts are identified when equivalent electrical specifications, memory organization, interface protocol, and physical packaging are maintained across different manufacturers. This ensures functional interchangeability in circuit designs without requiring layout or firmware modifications.

Key Parameters

Parameter	Value
Memory Size	16Kbit
Memory Organization	2K x 8
Memory Interface	I2C
Clock Frequency	1 MHz
Access Time	450 ns
Supply Voltage Range	1.7V ~ 5.5V
Operating Temperature Range	-40°C ~ 125°C
Package Type	8-TSSOP
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 24FC16T-E/ST is determined by strict equivalence across the following critical parameters:

Memory Specifications: Memory size must be 16Kbit with 2K x 8 organization to ensure data storage capacity and address mapping compatibility.

Interface Protocol: I2C interface is mandatory for bus-level compatibility with host controllers and existing circuit designs.

Electrical Performance: Clock frequency of 1 MHz, access time of 450 ns, and supply voltage range of 1.7V to 5.5V must be maintained to ensure timing compliance and power supply compatibility.

Physical Package: 8-TSSOP surface mount package with identical pin configuration and footprint is required for PCB assembly without design changes.

Compliance Standards: RoHS3 compliance and REACH unaffected status must be present to meet regulatory requirements.

The substitute part NV24C16DTVLT3G from onsemi meets all these criteria and qualifies as a parametric equivalent.

Parameter Comparison

Parameter	24FC16T-E/ST (Microchip)	NV24C16DTVLT3G (onsemi)	Match Status
Memory Size	16Kbit	16Kbit	Equivalent
Memory Organization	2K x 8	2K x 8	Equivalent
Memory Interface	I2C	I2C	Equivalent
Clock Frequency	1 MHz	1 MHz	Equivalent
Access Time	450 ns	450 ns	Equivalent
Supply Voltage Range	1.7V ~ 5.5V	1.7V ~ 5.5V	Equivalent
Operating Temperature Range	-40°C ~ 125°C	-40°C ~ 125°C	Equivalent
Package Type	8-TSSOP	8-TSSOP	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Write Cycle Time	5ms	4ms	Compatible (Faster)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Product Status	Active	Active	Equivalent

Engineering Selection Recommendations

Both the 24FC16T-E/ST and NV24C16DTVLT3G are active production devices with full RoHS3 compliance and REACH unaffected status, meeting current regulatory requirements for industrial and commercial applications.

The NV24C16DTVLT3G includes AEC-Q100 automotive qualification, indicating suitability for automotive-grade applications with enhanced reliability testing. This qualification is not specified for the 24FC16T-E/ST.

The NV24C16DTVLT3G demonstrates a faster write cycle time of 4ms compared to the 24FC16T-E/ST at 5ms. This represents improved performance without compromising compatibility, as write cycle time is not a limiting factor in I2C EEPROM applications where write operations are typically infrequent.

Both devices maintain identical electrical specifications for memory size, interface protocol, clock frequency, access time, and supply voltage range. Pin-to-pin compatibility and functional equivalence are confirmed across all critical parameters.

Frequently Asked Questions (FAQ)

Q: Can the NV24C16DTVLT3G replace the 24FC16T-E/ST in existing designs?

A: Yes. Both devices are parametrically equivalent across memory size, organization, interface protocol, clock frequency, access time, supply voltage range, operating temperature, and package type. Direct substitution is supported without circuit design modifications.

Q: What is the significance of the faster write cycle time in the NV24C16DTVLT3G?

A: The NV24C16DTVLT3G write cycle time of 4ms is faster than the 24FC16T-E/ST at 5ms. This represents improved performance characteristics. I2C EEPROM write operations are typically infrequent in system operation, so this difference does not impact functional compatibility or system timing requirements.

Q: Are both devices suitable for automotive applications?

A: The NV24C16DTVLT3G carries AEC-Q100 automotive qualification, confirming suitability for automotive-grade applications. The 24FC16T-E/ST does not specify automotive qualification. For automotive applications, the NV24C16DTVLT3G is the appropriate selection.

Q: Do both devices require identical PCB footprints?

A: Yes. Both devices use the 8-TSSOP package with identical pin configuration and physical dimensions (0.173" width, 4.40mm). PCB footprints are interchangeable without modification.

Q: What is the inventory availability for each part?

A: The 24FC16T-E/ST has 928 pieces in stock. The NV24C16DTVLT3G has 4790 pieces in stock. Availability should be confirmed with the supplier for current project requirements.

Q: Are both devices RoHS3 compliant?

A: Yes. Both the 24FC16T-E/ST and NV24C16DTVLT3G are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What is the I2C clock frequency specification for both devices?

A: Both devices operate at 1 MHz I2C clock frequency with 450 ns access time, ensuring compatibility with standard I2C bus implementations and host controller timing requirements.

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