Microchip Technology 24AA08T-I/CS16K

Overview

24AA08T-I/CS16K from Microchip Technology Inc. is an 8-Kbit I²C-compatible serial EEPROM organized as four 256 × 8-bit blocks, operating from 1.7V to 5.5V with 400 kHz max clock frequency, 16-byte page write buffer, and hardware write-protect via WP pin - deployed in industrial sensor calibration and embedded configuration storage.

For engineers reviewing the 24AA08T-I/CS16K datasheet, 24AA08T-I/CS16K pinout, 24AA08T-I/CS16K application, or 24AA08T-I/CS16K equivalent, key selection criteria include low-voltage operation (1.7V), I²C timing compliance at 400 kHz, industrial temperature range (–40°C to +85°C), and SOIC-8 package compatibility with legacy PCB footprints.

Technical Context

The 24AA08T-I/CS16K implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal address pointer supports current-address, random, and sequential read modes, while the 16-byte page buffer enables efficient burst writes without host-side buffering.

Write protection is enforced by the WP pin: tied to VSS for full read/write access, tied to VCC to disable all write operations across the entire 000h–3FFh memory space. The device uses self-timed erase/write cycles with no external timing components required.

Key Specifications

Pinout & Package

24AA08T-I/CS16K is supplied in an 8-lead SOIC (SN) package per Microchip drawing C04-057-SN Rev F, with 3.90 mm body width, 1.27 mm pitch, and matte tin (Sn) lead finish. The exposed pad is not present in this variant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM applications.

Compared with 24LC08BT-I/SN, the 24AA08T-I/CS16K supports lower-voltage operation critical for battery-powered designs; compared with AT24C08D-SSHM-T, it delivers guaranteed industrial-grade reliability and hardware-level write security essential for safety-critical firmware storage.

Availability

24AA08T-I/CS16K is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded configuration storage, and power supply sequencing requiring stable component supply across extended production lifecycles.

Supply support for 24AA08T-I/CS16K includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory solutions for industrial, automotive, and communications markets.

The 24AA08T-I/CS16K belongs to Microchip's 24XX08 family of I²C EEPROMs, designed specifically for reliable, low-power nonvolatile data storage in resource-constrained embedded systems with stringent voltage and temperature requirements.

FAQ

What is the maximum I²C clock frequency supported by the 24AA08T-I/CS16K?

The 24AA08T-I/CS16K supports up to 400 kHz in standard fast-mode I²C operation when V_CC is 2.5V or higher. At V_CC between 1.7V and 2.5V, the maximum clock frequency is reduced to 100 kHz to ensure timing margin and signal integrity - a design constraint explicitly defined in Microchip DS20001710M, Table 1-1 AC Characteristics.

Does the 24AA08T-I/CS16K require external pull-up resistors on SDA and SCL lines?

Yes, the 24AA08T-I/CS16K requires external pull-up resistors on both SDA and SCL lines because its I/O pins are open-drain. Typical values are 10 kΩ for 100 kHz operation and 2 kΩ for 400 kHz or 1 MHz - as specified in Section 2.2 of DS20001710M - to meet rise time requirements and avoid bus contention.

How does the WP pin function on the 24AA08T-I/CS16K?

The WP (Write-Protect) pin on the 24AA08T-I/CS16K disables all write operations when tied to V_CC, protecting the full 8-Kbit memory space (addresses 000h–3FFh). When tied to V_SS, full read/write access is enabled. This hardware-level lock operates independently of I²C commands and is active during power-up reset - confirmed in Section 2.4 and Figure 6-3 of DS20001710M.

What is the page write capability of the 24AA08T-I/CS16K?

The 24AA08T-I/CS16K features a 16-byte page write buffer, allowing up to 16 consecutive bytes to be written in a single I²C transaction. Page boundaries align to 16-byte intervals (e.g., 00h–0Fh, 10h–1Fh); crossing a boundary causes wraparound within the same page - a behavior documented in Section 6.2 and Figure 6-2 of DS20001710M.

Is the 24AA08T-I/CS16K qualified for automotive applications?

No, the 24AA08T-I/CS16K carries the "I" (Industrial) temperature grade (–40°C to +85°C) and is not AEC-Q100 qualified. While the broader 24XX08 family includes AEC-Q100-qualified variants like 24AA08HT-I/SN, the 24AA08T-I/CS16K part number specifically denotes industrial-grade qualification only - as stated in the Device Selection Table on page 1 of DS20001710M.