24LC014HT-I/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24LC014HT-I/ST is a 1Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface operation at 1 MHz clock frequency with 400 ns access time. The device is packaged in 8-TSSOP surface mount configuration and operates across a 2.5V to 5.5V supply voltage range with -40°C to 85°C temperature rating. Currently in active product status with 1135 units in stock, this component is ROHS3 compliant and suitable for non-volatile memory applications requiring I2C serial communication.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative packaging or performance characteristics better suit specific application requirements, or when supply chain optimization requires component standardization across product lines.

Key Parameters

Parameter	24LC014HT-I/ST
Memory Size	1Kbit
Memory Organization	128 x 8
Memory Interface	I2C
Clock Frequency	1 MHz
Access Time	400 ns
Write Cycle Time	5ms
Voltage Supply Range	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)
Package Type	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 24LC014HT-I/ST is determined by the following critical parameters:

Memory Capacity & Organization: All substitute parts must provide 1Kbit capacity with 128 x 8 organization to maintain functional equivalence in data storage and addressing.

Interface Protocol: I2C interface is mandatory. All substitutes operate via I2C serial communication protocol.

Package Compatibility: Primary substitutes maintain 8-TSSOP package format (0.173", 4.40mm Width) for direct PCB footprint compatibility. Secondary substitutes in 8-MSOP or 8-LSSOP packages require PCB layout modification but maintain electrical compatibility.

Voltage Supply Range: Substitutes must support the application's supply voltage. Parts with 2.5V ~ 5.5V range provide direct compatibility. Parts with narrower ranges (1.7V ~ 3.6V or 1.8V ~ 5.5V) require voltage verification against system design.

Clock Frequency & Access Time: The 1 MHz clock frequency with 400 ns access time represents the performance tier. Substitutes operating at 400 kHz with slower access times (900 ns to 4.6 µs) are functionally compatible but operate at reduced speed. Substitutes at 1 MHz with comparable or faster access times maintain performance parity.

Temperature Rating: Operating temperature range -40°C ~ 85°C is standard across all substitutes, ensuring thermal compatibility.

Compliance & Status: ROHS3 compliance and active product status are preferred for new designs. Parts marked "Not For New Designs" are available for legacy system support only.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Package	Product Status	Inventory
24LC014HT-I/ST	Microchip	1Kbit	1 MHz	400 ns	2.5V ~ 5.5V	8-TSSOP	Active	1135
24LC014T-I/ST	Microchip	1Kbit	400 kHz	900 ns	2.5V ~ 5.5V	8-TSSOP	Active	3435
24LC01BT-I/ST	Microchip	1Kbit	400 kHz	4.6 µs	2.5V ~ 5.5V	8-TSSOP	Active	2100
AT24C01D-XHM-B	Microchip	1Kbit	1 MHz	4.5 µs	1.7V ~ 3.6V	8-TSSOP	Active	2640
AT24C01D-XHM-T	Microchip	1Kbit	1 MHz	4.5 µs	1.7V ~ 3.6V	8-TSSOP	Active	5300
AT24CS01-XHM-T	Microchip	1Kbit	1 MHz	550 ns	1.7V ~ 5.5V	8-TSSOP	Active	25400
BR24G01FVJ-3GTE2	Rohm	1Kbit	400 kHz	Not Specified	1.6V ~ 5.5V	8-TSSOP-BJ	Not For New Designs	4913
BR24G01FVM-3AGTTR	Rohm	1Kbit	1 MHz	Not Specified	1.6V ~ 5.5V	8-MSOP	Active	3881
BR24G01FVT-3GE2	Rohm	1Kbit	400 kHz	Not Specified	1.6V ~ 5.5V	8-TSSOP-B	Active	1163
BR24L01AFV-WE2	Rohm	1Kbit	400 kHz	Not Specified	1.8V ~ 5.5V	8-LSSOP	Not For New Designs	3425
BR24L01AFVM-WTR	Rohm	1Kbit	400 kHz	Not Specified	1.8V ~ 5.5V	8-MSOP	Active	15690

Engineering Selection Recommendations

Direct Substitutes (Same Package, Same Voltage Range)

The 24LC014T-I/ST and 24LC01BT-I/ST are Microchip parts in identical 8-TSSOP packaging with matching 2.5V ~ 5.5V supply voltage range. Both are active products with ROHS3 compliance. These parts provide the most straightforward substitution path with no PCB layout changes required. The trade-off is reduced clock frequency (400 kHz versus 1 MHz) and increased access time, suitable for applications where I2C bus speed is not performance-critical.

Microchip AT24 Series Substitutes

The AT24C01D-XHM-B, AT24C01D-XHM-T, and AT24CS01-XHM-T maintain 8-TSSOP packaging and 1 MHz clock frequency. However, the AT24C01D variants operate at 1.7V ~ 3.6V supply voltage, requiring verification that system power rails remain within this narrower range. The AT24CS01-XHM-T extends voltage compatibility to 1.7V ~ 5.5V, providing broader application flexibility. All three are active products with ROHS3 compliance. AT24CS01-XHM-T offers the highest inventory availability (25400 units) and fastest access time (550 ns).

Rohm BR24 Series Substitutes

Rohm semiconductor parts provide alternative sourcing with extended voltage ranges (1.6V ~ 5.5V or 1.8V ~ 5.5V). The BR24G01FVM-3AGTTR and BR24L01AFVM-WTR are active products suitable for new designs. BR24G01FVJ-3GTE2 and BR24L01AFV-WE2 are marked "Not For New Designs" and should be reserved for legacy system maintenance only. Package variants include 8-MSOP and 8-LSSOP, which require PCB footprint modification but maintain electrical compatibility.

Compliance & Availability Considerations

All recommended substitutes maintain ROHS3 compliance and MSL rating of 1 (Unlimited) or MSL 3 (168 Hours), ensuring compatibility with standard manufacturing processes. Parts marked "Active" product status are appropriate for new design implementations. The AT24CS01-XHM-T offers the highest inventory level, supporting supply chain continuity for high-volume applications.

Frequently Asked Questions (FAQ)

Q: Can I use a 400 kHz I2C part as a substitute for the 1 MHz 24LC014HT-I/ST?

A: Yes. The 24LC014T-I/ST and 24LC01BT-I/ST operate at 400 kHz and are functionally compatible. The I2C bus will operate at the lower speed, which is acceptable in most applications. Verify that your system design does not require the higher 1 MHz clock frequency for timing-critical operations.

Q: What is the difference between 8-TSSOP and 8-MSOP packages?

A: Both are surface mount packages with 8 pins, but differ in physical dimensions. 8-TSSOP is 0.173" wide (4.40mm), while 8-MSOP is 0.110" wide (2.80mm). They have different PCB footprints and cannot be used interchangeably without PCB redesign. Verify your PCB layout supports the selected package before substitution.

Q: Can I substitute an AT24C01D part with 1.7V ~ 3.6V supply range into a 2.5V ~ 5.5V system?

A: Only if your system operates within the 1.7V ~ 3.6V range. If your system uses 5V logic or power rails, the AT24C01D will not function. The AT24CS01-XHM-T supports 1.7V ~ 5.5V and is compatible with both 3.3V and 5V systems.

Q: What does "Not For New Designs" mean for BR24G01FVJ-3GTE2 and BR24L01AFV-WE2?

A: These parts are available for existing product support and legacy system maintenance but should not be selected for new product development. Use active product alternatives such as BR24G01FVM-3AGTTR or BR24L01AFVM-WTR for new designs.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed maintain ROHS3 compliance, ensuring compatibility with environmental and regulatory requirements for electronic component manufacturing and assembly.

Q: What is the significance of MSL (Moisture Sensitivity Level)?

A: MSL 1 (Unlimited) indicates the part has no moisture sensitivity restrictions and can be stored indefinitely without special drying procedures. MSL 3 (168 Hours) requires the part to be used within 168 hours of package opening or requires baking to restore moisture absorption capacity. For standard manufacturing environments, MSL 1 parts are preferred.

Q: Can I use Rohm BR24 parts as direct replacements for Microchip 24LC parts?

A: Yes, functionally. Both manufacturers produce 1Kbit I2C EEPROM devices with identical memory organization and interface. Verify package compatibility (8-TSSOP, 8-MSOP, or 8-LSSOP) and voltage supply range match your application requirements before substitution.

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