AT24CS16-SSHM-B Equivalent & Substitute Parts

Part Overview

The AT24CS16-SSHM-B is a 16Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface operation at 1 MHz with 550 ns access time. This component is actively produced and widely used in embedded systems requiring non-volatile memory storage with low-voltage operation (1.7V to 5.5V). Substitute parts are necessary when the primary part experiences supply constraints, extended lead times, or when design requirements necessitate alternative manufacturer specifications such as automotive qualification or different operating temperature ranges.

Substiute Parts

AT24CS16-SSHM-B

Microchip TechnologyIn Stock: 740AT24CS16-SSHM-B Datasheet

Current PartRFQ

AT24C16C-SSHM-B

Microchip TechnologyIn Stock: 88312AT24C16C-SSHM-B Datasheet

Parametric EquivalentRFQ

CAV24C16WE-GT3

onsemiIn Stock: 1449CAV24C16WE-GT3 Datasheet

MFR RecommendedRFQ

M24C16-RMN6P

STMicroelectronicsIn Stock: 3162M24C16-RMN6P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT24CS16-SSHM-B is determined by the following critical parameters:

• Memory Capacity & Organization: Must be 16Kbit with 2K x 8 organization
• Interface Protocol: Must support I2C communication
• Package & Pinout: Must use 8-SOIC form factor with identical pin configuration
• Voltage Compatibility: Supply voltage range must overlap with or encompass 1.7V ~ 5.5V
• Write Cycle Time: Must not exceed 5ms
• Environmental Compliance: RoHS3 compliance required

The substitute parts listed below meet these core substitution criteria. Variations in clock frequency (1 MHz vs. 400 kHz) and access time (550 ns vs. 900 ns) represent performance differences that do not prevent functional substitution in most applications, as these parameters define maximum operating speeds rather than minimum requirements. Temperature range extensions and automotive qualifications represent enhanced capabilities rather than incompatibilities.

Parameter Comparison

Engineering Selection Recommendations

AT24C16C-SSHM-B (Microchip Technology) is the primary parametric equivalent, offering identical electrical specifications and performance characteristics to the AT24CS16-SSHM-B. Both parts maintain the same 1 MHz clock frequency, 550 ns access time, and 1.7V ~ 5.5V supply voltage range. This substitute provides the highest compatibility for direct replacement in existing designs. Inventory availability is significantly higher (88,300 pcs vs. 683 pcs), making this the preferred choice for supply continuity.

M24C16-RMN6P (STMicroelectronics) operates at reduced clock frequency (400 kHz) and increased access time (900 ns) compared to the primary part, but maintains functional I2C compatibility and identical write cycle time. This part supports extended operating temperature range (-40°C ~ 85°C) and lower minimum supply voltage (1.8V). Selection of this substitute is appropriate when STMicroelectronics supply chain preference exists or when the reduced clock frequency aligns with system timing requirements.

CAV24C16WE-GT3 (onsemi) provides automotive-grade qualification (AEC-Q100) with extended operating temperature range (-40°C ~ 125°C) and superior moisture sensitivity level (MSL 1 vs. MSL 3). Clock frequency and access time match the M24C16-RMN6P specifications. This part is suitable for automotive applications or environments requiring enhanced temperature performance. Minimum supply voltage is 2.5V, which may limit use in ultra-low-voltage applications below this threshold.

Frequently Asked Questions (FAQ)

Q: Can AT24C16C-SSHM-B be used as a direct replacement for AT24CS16-SSHM-B?

A: Yes. Both parts share identical electrical specifications, memory organization, I2C interface, clock frequency, access time, and supply voltage range. The parts are functionally interchangeable at the circuit level.

Q: What is the impact of using M24C16-RMN6P or CAV24C16WE-GT3 with their 400 kHz clock frequency instead of 1 MHz?

A: The 400 kHz clock frequency represents a maximum operating speed specification. Systems designed for 1 MHz operation will function correctly at the reduced 400 kHz speed, with proportionally longer I2C transaction times. This substitution is valid when system timing margins accommodate the slower clock rate.

Q: Are there voltage supply compatibility issues when substituting parts?

A: CAV24C16WE-GT3 has a minimum supply voltage of 2.5V, which is higher than the AT24CS16-SSHM-B minimum of 1.7V. This part cannot be used in applications requiring operation below 2.5V. M24C16-RMN6P (1.8V minimum) and AT24C16C-SSHM-B (1.7V minimum) maintain compatibility with the original part's full voltage range.

Q: What packaging differences exist among these substitutes?

A: AT24CS16-SSHM-B, AT24C16C-SSHM-B, and M24C16-RMN6P are supplied in Tube packaging. CAV24C16WE-GT3 is supplied in Tape & Reel (TR) format. All parts use identical 8-SOIC physical package dimensions (0.154", 3.90mm Width) and are surface-mount compatible.

Q: When should CAV24C16WE-GT3 be selected over other substitutes?

A: CAV24C16WE-GT3 is the appropriate choice for automotive applications requiring AEC-Q100 qualification or for systems operating in extended temperature environments up to 125°C. The superior moisture sensitivity level (MSL 1) also provides advantages in high-humidity storage and assembly conditions.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the environmental compliance status of the AT24CS16-SSHM-B.