AT88SC1616C-SU Equivalent & Substitute Parts

Part Overview

The AT88SC1616C-SU is a Secure Memory IC manufactured by Microchip Technology in the CryptoMemory® series. This 8-SOIC surface mount device is designed for embedded and smart card applications requiring secure memory functionality. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts must maintain compatibility with the 8-SOIC package format and support the same mounting type and electrical interface requirements.

Key Parameters

Parameter	Value
Manufacturer Part Number	AT88SC1616C-SU
Manufacturer	Microchip Technology
Product Type	Secure Memory
Series	CryptoMemory®
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Applications	Embedded, Smart Card
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitute parts for the AT88SC1616C-SU are selected based on the following critical parameters:

Package Compatibility: All substitute parts must use the 8-SOIC (0.154", 3.90mm Width) surface mount package to ensure PCB layout and assembly compatibility.

Mounting Type: Surface mount technology is required for all substitutes to maintain assembly process compatibility.

Memory Organization: The AT88SC1616C-SU operates as a 16Kbit secure memory device. Substitute parts must provide equivalent or compatible memory capacity and organization (2K x 8 format).

Interface Type: The primary substitutes utilize I2C interface protocol, which is compatible with secure memory applications requiring serial communication.

Electrical Compliance: All substitutes must meet ROHS3 compliance and REACH unaffected status to satisfy regulatory requirements equivalent to the original part.

Moisture Sensitivity: MSL 1 (Unlimited) rating ensures substitutes can be stored and handled without moisture bake-out requirements.

The substitution logic prioritizes active product status parts from Microchip Technology to ensure long-term availability and manufacturer support.

Parameter Comparison

Part Number	Manufacturer	Product Type	Memory Size	Memory Organization	Interface	Package	Mounting Type	Product Status	RoHS Status	MSL
AT88SC1616C-SU	Microchip Technology	Secure Memory	16Kbit	N/A	N/A	8-SOIC	Surface Mount	Obsolete	ROHS3 Compliant	1
24AA16-E/SN	Microchip Technology	EEPROM	16Kbit	2K x 8	I2C 400 kHz	8-SOIC	Surface Mount	Active	ROHS3 Compliant	1
24AA16-I/SN	Microchip Technology	EEPROM	16Kbit	2K x 8	I2C 400 kHz	8-SOIC	Surface Mount	Active	ROHS3 Compliant	1
24AA16H-I/SN	Microchip Technology	EEPROM	16Kbit	2K x 8	I2C 400 kHz	8-SOIC	Surface Mount	Active	ROHS3 Compliant	1
24LC16B-E/SN	Microchip Technology	EEPROM	16Kbit	2K x 8	I2C 400 kHz	8-SOIC	Surface Mount	Active	ROHS3 Compliant	1
24LC16B-I/SN	Microchip Technology	EEPROM	16Kbit	2K x 8	I2C 400 kHz	8-SOIC	Surface Mount	Active	ROHS3 Compliant	1
24LC16B-M/SN	Microchip Technology	EEPROM	16Kbit	2K x 8	I2C 400 kHz	8-SOIC	Surface Mount	Active	ROHS3 Compliant	1
24LC16BH-E/SN	Microchip Technology	EEPROM	16Kbit	2K x 8	I2C 400 kHz	8-SOIC	Surface Mount	Active	ROHS3 Compliant	1
24LC16BH-I/SN	Microchip Technology	EEPROM	16Kbit	2K x 8	I2C 400 kHz	8-SOIC	Surface Mount	Active	ROHS3 Compliant	1
AT24CS16-SSHM-T	Microchip Technology	EEPROM	16Kbit	2K x 8	I2C 1 MHz	8-SOIC	Surface Mount	Active	ROHS3 Compliant	3
AT88SC1616C-SH	Microchip Technology	Secure Memory	16Kbit	N/A	N/A	8-SOIC	Surface Mount	Active	ROHS3 Compliant	1

Engineering Selection Recommendations

Primary Substitute - AT88SC1616C-SH: The AT88SC1616C-SH is the direct active equivalent to the obsolete AT88SC1616C-SU. Both parts are Microchip Technology CryptoMemory® series secure memory devices in 8-SOIC packaging. The AT88SC1616C-SH maintains identical package specifications, MSL rating, and regulatory compliance (ROHS3, REACH unaffected). This part is currently in active production status, ensuring availability and manufacturer support for new designs and production continuity.

Secondary Substitutes - 24LC16B and 24AA16 Series: The 24LC16B-E/SN, 24LC16B-I/SN, 24LC16BH-E/SN, 24LC16BH-I/SN, 24AA16-E/SN, 24AA16-I/SN, and 24AA16H-I/SN are EEPROM memory devices that share the 8-SOIC package format and I2C interface with the original part. These parts are active products with high inventory availability. Selection among these variants depends on operating temperature range requirements and supply voltage specifications. The 24LC16B series supports 2.5V to 5.5V supply voltage, while the 24AA16 series supports 1.7V to 5.5V. Temperature range variants (-40°C to 85°C or -40°C to 125°C) are available to match specific application requirements.

Alternative Substitute - AT24CS16-SSHM-T: The AT24CS16-SSHM-T is an EEPROM memory IC with enhanced I2C clock frequency (1 MHz versus 400 kHz standard). This part provides faster access time (550 ns) and operates across the 1.7V to 5.5V supply voltage range. The MSL rating is 3 (168 Hours), requiring moisture control during storage and handling. This part is suitable for applications requiring higher speed memory access while maintaining 8-SOIC package compatibility.

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original AT88SC1616C-SU specification.

Frequently Asked Questions (FAQ)

Q: Can the 24LC16B or 24AA16 EEPROM series directly replace the AT88SC1616C-SU secure memory device?

A: The 24LC16B and 24AA16 series are EEPROM memory devices that share the same 8-SOIC package, surface mount technology, and I2C serial interface. However, the original AT88SC1616C-SU is a secure memory device with cryptographic capabilities. The EEPROM substitutes provide equivalent memory capacity (16Kbit, 2K x 8 organization) and package compatibility but do not include the security features of the CryptoMemory® series. Selection depends on whether cryptographic functionality is required in the application.

Q: What is the difference between 24AA16 and 24LC16B variants?

A: The primary difference is supply voltage range. The 24AA16 series operates from 1.7V to 5.5V, providing wider voltage compatibility for low-power applications. The 24LC16B series operates from 2.5V to 5.5V, suitable for standard voltage applications. Both series provide identical 16Kbit memory capacity, 2K x 8 organization, I2C 400 kHz interface, and 8-SOIC packaging. Temperature range variants (I, E, M, H suffixes) indicate different operating temperature specifications.

Q: What do the temperature range suffixes (I, E, M, H) indicate?

A: Temperature range suffixes denote the operating temperature specification: I = -40°C to 85°C (industrial), E = -40°C to 125°C (extended), M = -55°C to 125°C (military), H = high temperature variant. Selection depends on the application's thermal environment and reliability requirements.

Q: Is the AT24CS16-SSHM-T a suitable substitute for the AT88SC1616C-SU?

A: The AT24CS16-SSHM-T is an EEPROM memory device with 1 MHz I2C clock frequency, providing faster access (550 ns) compared to standard 400 kHz devices. It shares the 8-SOIC package and surface mount compatibility. However, it is an EEPROM, not a secure memory device, and has MSL 3 rating requiring moisture control. It is suitable for applications requiring higher speed memory access without cryptographic requirements.

Q: Why is the AT88SC1616C-SH recommended as the primary substitute?

A: The AT88SC1616C-SH is the active production equivalent of the obsolete AT88SC1616C-SU. Both are Microchip Technology CryptoMemory® series secure memory devices with identical functionality, package specifications (8-SOIC), and regulatory compliance (ROHS3, REACH unaffected). The AT88SC1616C-SH maintains the cryptographic security features of the original part while ensuring long-term availability and manufacturer support.

Q: What packaging format is used for all substitute parts?

A: All substitute parts use the 8-SOIC (0.154", 3.90mm Width) surface mount package, ensuring compatibility with existing PCB layouts and assembly processes. This package format is consistent across all recommended substitutes.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all recommended substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory compliance of the original AT88SC1616C-SU. This ensures compliance with environmental and hazardous substance regulations.

Q: What is the moisture sensitivity level (MSL) for the substitute parts?

A: Most substitute parts (24AA16, 24LC16B, 24LC16BH, AT88SC1616C-SH) have MSL 1 (Unlimited), requiring no moisture control during storage and handling. The AT24CS16-SSHM-T has MSL 3 (168 Hours), requiring moisture bake-out if storage exceeds 168 hours in standard humidity conditions.

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