Equivalent & Substitute Parts for 24AA16T-I/CS16K

Part Overview

The 24AA16T-I/CS16K is a 16Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface operation at 400 kHz with 900 ns access time. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and production requirements. The part operates across a wide supply voltage range of 1.7V to 5.5V and supports industrial temperature specifications from -40°C to 85°C.

Key Parameters

Parameter	Value
Memory Size	16Kbit
Memory Organization	2K x 8
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Write Cycle Time	5ms
Voltage Supply Range	1.7V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	5-UFBGA, CSPBGA
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 24AA16T-I/CS16K are identified based on strict electrical and mechanical parameter compatibility. The primary substitution criteria are:

Critical Parameters for Substitution:

Memory size: 16Kbit capacity
Memory interface: I2C protocol
Clock frequency: 400 kHz operation
Memory organization: 2K x 8 configuration
Package type: 5-UFBGA or CSPBGA form factor
Write cycle time: 5ms specification
Operating temperature range: -40°C to 85°C

Voltage Supply Consideration: The original part operates at 1.7V to 5.5V. Substitute parts must support the minimum voltage requirement of the application circuit. Parts with narrower voltage ranges (such as 1.7V to 3.6V) are acceptable only when the application operates within that reduced range.

Parameter Comparison

Parameter	24AA16T-I/CS16K (Main)	BRCB016GWL-3E2 (Substitute)	AT24C32E-U1UM0B-T (Substitute)
Manufacturer	Microchip Technology	Rohm Semiconductor	Microchip Technology
Memory Size	16Kbit	16Kbit	32Kbit
Memory Organization	2K x 8	2K x 8	Not specified
Memory Interface	I2C	I2C	I2C
Clock Frequency	400 kHz	400 kHz	1 MHz
Access Time	900 ns	Not specified	Not specified
Write Cycle Time	5ms	5ms	Not specified
Voltage Supply Range	1.7V ~ 5.5V	1.7V ~ 3.6V	Not specified
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	Not specified
Package Type	5-UFBGA, CSPBGA	5-UFBGA, CSPBGA	Not specified
Product Status	Obsolete	Not For New Designs	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)

Engineering Selection Recommendations

BRCB016GWL-3E2 (Rohm Semiconductor): This part provides direct electrical and mechanical equivalence to the 24AA16T-I/CS16K. It maintains identical memory capacity (16Kbit), interface protocol (I2C), clock frequency (400 kHz), write cycle time (5ms), and operating temperature range (-40°C to 85°C). The package type matches the original specification. However, the voltage supply range is restricted to 1.7V to 3.6V, requiring verification that the application circuit operates within this narrower range. The part is classified as "Not For New Designs," indicating limited long-term availability. ROHS3 compliance and MSL 1 rating are maintained.

AT24C32E-U1UM0B-T (Microchip Technology): This part is classified as active product status, providing the longest availability horizon. It maintains I2C interface compatibility and operates at 1 MHz clock frequency, which is faster than the original 400 kHz specification. The memory capacity is increased to 32Kbit, which may require firmware or software modifications to address the expanded memory space. ROHS3 compliance is maintained. The MSL rating of 3 (168 Hours) represents a higher moisture sensitivity level compared to the original part's MSL 1 rating. Detailed electrical parameters including voltage supply range, operating temperature, and package specifications are not provided in the available data.

Frequently Asked Questions (FAQ)

Q: Can BRCB016GWL-3E2 be used as a direct replacement for 24AA16T-I/CS16K?

A: BRCB016GWL-3E2 provides functional equivalence for applications operating within the 1.7V to 3.6V supply voltage range. All critical parameters including memory size, interface protocol, clock frequency, write cycle time, and operating temperature match the original specification. Voltage range compatibility must be confirmed for your specific application.

Q: What is the primary limitation of BRCB016GWL-3E2?

A: The voltage supply range is limited to 1.7V to 3.6V, compared to the original part's 1.7V to 5.5V range. Applications requiring operation above 3.6V cannot use this substitute without circuit redesign.

Q: Is AT24C32E-U1UM0B-T a suitable replacement?

A: AT24C32E-U1UM0B-T maintains I2C interface compatibility and active product status. However, the doubled memory capacity (32Kbit versus 16Kbit) and increased clock frequency (1 MHz versus 400 kHz) may require firmware modifications and system validation. Detailed electrical specifications are not available for complete compatibility assessment.

Q: What are the package compatibility considerations?

A: Both substitute parts maintain the 5-UFBGA and CSPBGA package types specified for the original part. Physical footprint compatibility should be verified against your PCB design documentation.

Q: How do the moisture sensitivity levels compare?

A: The original 24AA16T-I/CS16K and BRCB016GWL-3E2 both carry MSL 1 rating (unlimited moisture exposure). AT24C32E-U1UM0B-T carries MSL 3 rating (168 hours), requiring stricter handling and storage protocols during manufacturing and assembly.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, both substitute parts maintain ROHS3 compliance, matching the original part's environmental certification status.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message