24FC128T-I/MS

Memory IC Overview

The Microchip Technology 24FC128T-I/MS is a 16K x 8 (128 Kbit) Serial Electrically Erasable PROM (EEPROM) housed in an 8-lead MSOP package. It operates with a supply voltage range of 1.7V to 5.5V and supports I2C compatible two-wire serial interfaces at clock frequencies up to 1 MHz when VCC is 2.5V or higher. The device features a 64-byte page write buffer, hardware write protection via the WP pin, and Schmitt trigger inputs for noise suppression. It is rated for industrial temperatures from -40°C to +85°C.

Memory IC Feature Summary

• Supports cascading up to eight devices on the same bus using configurable chip select bits A0, A1, and A2.
• Includes a 64-byte page write buffer to facilitate efficient data writing operations.
• Features hardware write protection controlled by the WP pin to inhibit array writes.

Memory IC Applications

• Personal communications systems
• Data acquisition applications
• Low-power embedded memory storage

Memory IC Procurement Notes

Verify that the ordering suffix 'I' corresponds to the Industrial temperature range (-40°C to +85°C). Confirm the 'MS' suffix indicates the 8-lead MSOP package. Ensure the 'T' suffix matches the required tape and reel packaging format. Cross-reference the specific datasheet revision to confirm electrical characteristics align with the target design requirements.

Memory IC Selection Notes

Select this component when a 128 Kbit EEPROM is required with high-speed I2C support up to 1 MHz. It is suitable for designs needing operation down to 1.7V. Note that the MSOP package lacks connected A0 and A1 pins, limiting bus expansion to two devices unless external logic is used. Compare against 24LC128 if only 400 kHz speed is needed but lower cost is prioritized.

Memory IC Part Context

This part belongs to the 24XX128 family, which includes the 24AA128 and 24LC128 variants. While all share similar architecture and pinouts, the 24FC128 specifically offers 1 MHz clock compatibility at voltages above 2.5V, whereas other family members are limited to 400 kHz. The MSOP package variant restricts physical address pin connectivity compared to SOIC or TSSOP options.

Memory IC Replacement Considerations

Direct functional substitutes within the same package include the 24FC128-I/MS. For different packages, consider 24FC128-I/SN (SOIC-8) or 24FC128-I/ST (TSSOP-8). Verify voltage and speed requirements before substituting with 24LC128 or 24AA128 variants.

Memory IC FAQ

How many devices can be connected to the same I2C bus using the 24FC128T-I/MS?

Due to the MSOP package having unconnected A0 and A1 pins, only two 24FC128T-I/MS devices can be connected to the same bus. Other packages in the series support up to eight devices.

What is the maximum clock frequency supported by this device?

The device supports a maximum clock frequency of 1 MHz when the supply voltage (VCC) is between 2.5V and 5.5V. At voltages below 2.5V, the maximum frequency is limited to 400 kHz.