AT24C16C-SSHM-T EEPROM 16Kbit I2C Equivalent & Substitute Parts

Part Overview

The AT24C16C-SSHM-T is a 16Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface with 1 MHz clock frequency and 550 ns access time. The device is packaged in 8-SOIC surface mount configuration and operates across a wide voltage range of 1.7V to 5.5V. This part is currently in active production status with verified programmability certification.

Substitute parts are necessary when the primary part experiences supply constraints, extended lead times, or when design requirements permit operation at alternative clock frequencies or access times while maintaining core 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-SOIC
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following parameters:

Core Compatibility Requirements:

Memory Size: 16Kbit (mandatory)
Memory Organization: 2K x 8 (mandatory)
Memory Interface: I2C (mandatory)
Write Cycle Time: 5ms (mandatory)
Package Type: 8-SOIC or equivalent footprint (mandatory)
Operating Temperature Range: -40°C ~ 85°C (mandatory)
RoHS Status: ROHS3 Compliant (mandatory)

Allowable Variations:

Clock Frequency: 400 kHz or 1 MHz (both acceptable for I2C protocol compatibility)
Access Time: 450 ns, 550 ns, or 900 ns (performance variation acceptable)
Voltage Supply Range: Minimum 1.6V to 1.7V, Maximum 5.5V (overlapping ranges acceptable)
Packaging Format: Cut Tape, Tape & Reel, or Tube (logistics variation)
Manufacturer: Microchip Technology or Rohm Semiconductor (qualified suppliers)

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Package	Programmable Status
AT24C16C-SSHM-T	Microchip Technology	16Kbit	1 MHz	550 ns	1.7V ~ 5.5V	8-SOIC (CT)	Verified
AT24C16D-SSHM-T	Microchip Technology	16Kbit	1 MHz	450 ns	1.7V ~ 3.6V	8-SOIC (CT)	Verified
24AA16-I/SN	Microchip Technology	16Kbit	400 kHz	900 ns	1.7V ~ 5.5V	8-SOIC (Tube)	Verified
24AA16H-I/SN	Microchip Technology	16Kbit	400 kHz	900 ns	1.7V ~ 5.5V	8-SOIC (Tube)	Not Verified
24AA16T-I/SN	Microchip Technology	16Kbit	400 kHz	900 ns	1.7V ~ 5.5V	8-SOIC (CT)	Verified
AT24CS16-SSHM-T	Microchip Technology	16Kbit	1 MHz	550 ns	1.7V ~ 5.5V	8-SOIC (TR)	Not Verified
BR24G16F-3AGTE2	Rohm Semiconductor	16Kbit	1 MHz	Not Specified	1.6V ~ 5.5V	8-SOP	Not Verified
BR24G16F-3GTE2	Rohm Semiconductor	16Kbit	400 kHz	Not Specified	1.6V ~ 5.5V	8-SOP	Not Verified
BR24G16FJ-3AGTE2	Rohm Semiconductor	16Kbit	1 MHz	Not Specified	1.6V ~ 5.5V	8-SOP-J	Not Verified
BR24G16FJ-3GTE2	Rohm Semiconductor	16Kbit	400 kHz	Not Specified	1.6V ~ 5.5V	8-SOP-J	Not Verified
BR24S16FJ-WE2	Rohm Semiconductor	16Kbit	400 kHz	Not Specified	1.7V ~ 5.5V	8-SOP-J	Verified

Engineering Selection Recommendations

Direct Substitutes (Highest Compatibility):

AT24C16D-SSHM-T is a direct Microchip Technology substitute with identical 1 MHz clock frequency and matching 8-SOIC package. This part offers improved access time of 450 ns compared to the primary part's 550 ns. Voltage supply range is narrower (1.7V to 3.6V), requiring verification that system supply does not exceed 3.6V. Product status is active with verified programmability.

24AA16T-I/SN is a Microchip Technology substitute with 400 kHz clock frequency and 8-SOIC Cut Tape packaging. This part maintains full voltage compatibility (1.7V to 5.5V) and verified programmability status. Access time is 900 ns, representing reduced performance compared to the primary part. This substitute is suitable for applications where clock frequency reduction is acceptable.

Cross-Manufacturer Substitutes (Rohm Semiconductor):

BR24S16FJ-WE2 is a Rohm Semiconductor equivalent with 400 kHz clock frequency, 8-SOP-J package, and verified programmability. Voltage range is 1.7V to 5.5V, matching the primary part. Package footprint differs (8-SOP-J versus 8-SOIC), requiring PCB layout verification. This part has the highest inventory availability at 49,944 units.

BR24G16F-3AGTE2 and BR24G16FJ-3AGTE2 are Rohm Semiconductor 1 MHz equivalents with matching clock frequency to the primary part. Both feature 1.6V to 5.5V voltage range and ROHS3 compliance. Package types differ (8-SOP and 8-SOP-J respectively), requiring footprint verification. Programmability status is not verified.

Conditional Substitutes:

AT24CS16-SSHM-T matches the primary part's electrical specifications (1 MHz, 550 ns, 1.7V to 5.5V) but differs in packaging format (Tape & Reel versus Cut Tape). Programmability status is not verified. This part is suitable only when packaging format change is acceptable and verification testing is performed.

24AA16H-I/SN and 24AA16-I/SN are Microchip Technology parts with 400 kHz operation and Tube packaging. Both maintain full voltage compatibility and verified or unverified programmability status. These parts are suitable for applications tolerating reduced clock frequency and packaging format change.

Frequently Asked Questions (FAQ)

Q: Can I substitute AT24C16D-SSHM-T for AT24C16C-SSHM-T in all applications?

A: AT24C16D-SSHM-T is compatible with AT24C16C-SSHM-T when system supply voltage does not exceed 3.6V. The narrower voltage range (1.7V to 3.6V versus 1.7V to 5.5V) is the only functional difference. Verify your system's maximum supply voltage before substitution.

Q: What is the difference between 8-SOIC and 8-SOP packages?

A: Both are 8-pin surface mount packages with different physical dimensions. 8-SOIC has 0.154" width (3.90mm), while 8-SOP variants have 0.173" width (4.40mm) or 0.154" width (3.90mm) for 8-SOP-J. PCB footprint compatibility must be verified before substituting between these package types.

Q: Can I use a 400 kHz I2C EEPROM to replace a 1 MHz part?

A: Yes, 400 kHz parts (24AA16-I/SN, 24AA16T-I/SN, BR24G16F-3GTE2, BR24S16FJ-WE2) are compatible substitutes. I2C protocol supports both clock frequencies. System I2C bus speed must be configured to 400 kHz or lower. No functional incompatibility exists.

Q: What does "Programmable Status: Not Verified" mean?

A: Parts marked "Not Verified" have not undergone DiGi-Electronics programmability certification. These parts meet manufacturer specifications but lack third-party verification. Use verified parts (status: Verified) for critical applications or perform independent verification testing before deployment.

Q: Are Rohm Semiconductor parts fully compatible with Microchip Technology parts?

A: Rohm Semiconductor BR24 series parts are functionally equivalent in memory size, organization, interface, and write cycle time. Differences exist in package dimensions (8-SOP versus 8-SOIC) and access time specifications. PCB layout verification is required when substituting between manufacturers.

Q: Which substitute has the best availability?

A: BR24S16FJ-WE2 has the highest inventory at 49,944 units. 24AA16T-I/SN has 13,300 units. Both are suitable for high-volume applications requiring immediate availability.

Q: Can I use AT24CS16-SSHM-T as a direct replacement?

A: AT24CS16-SSHM-T has identical electrical specifications (1 MHz, 550 ns, 1.7V to 5.5V) but differs in packaging format (Tape & Reel versus Cut Tape). Programmability is not verified. This part is suitable only when packaging format change is acceptable and verification testing is performed.

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