Microchip Technology 24FC512T-I/ST16KVAO

Overview

24FC512T-I/ST16KVAO from Microchip Technology Inc. is a 512 Kbit I²C-compatible serial EEPROM organized as 64K × 8-bit, operating from 1.7V to 5.5V with 1 MHz clock support, 5 ms max page write time, and industrial temperature range (–40°C to +85°C). It features hardware write-protection, 128-byte page buffer, and Schmitt-trigger inputs for noise immunity in embedded control and data logging systems.

For engineers reviewing the 24FC512T-I/ST16KVAO datasheet, 24FC512T-I/ST16KVAO pinout, 24FC512T-I/ST16KVAO application, or 24FC512T-I/ST16KVAO equivalent, this page delivers verified electrical specs, package mapping to 8-lead SOIC (ST), functional pin roles, real-world use cases, and two validated alternative parts with documented technical and application differences.

Technical Context

The 24FC512T-I/ST16KVAO implements a two-wire I²C interface with full compatibility up to 1 MHz at V_CC ≥ 2.5V and 400 kHz below 2.5V. Its internal architecture includes a 128-byte page write buffer, self-timed erase/write cycle, and address pointer logic enabling contiguous sequential reads across the full 64K address space.

Hardware write protection is controlled solely by the WP pin state at the Stop bit of each write command; no internal register configuration is required. The device uses Schmitt-trigger inputs on SDA and SCL with 50 ns spike suppression and hysteresis ≥0.05×V_CC, ensuring robust operation in electrically noisy environments without external filtering.

Key Specifications

Pinout & Package

24FC512T-I/ST16KVAO is packaged in an 8-lead SOIC (ST) with 150 mil body width and standard JEDEC MS-012AC footprint. Pin 1 is marked with a beveled corner or dot; leads are matte tin-plated.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24FC512T-I/ST16KVAO, the 24AA512T-I/ST trades speed for broad backward compatibility, while the AT24C512BN-SH-B offers similar speed at lower qualification rigor and endurance-making 24FC512T-I/ST16KVAO the optimal choice for automotive and high-reliability industrial designs demanding 1 MHz performance and AEC-Q100 assurance.

Availability

24FC512T-I/ST16KVAO is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical device manufacturing requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.

Supply support for 24FC512T-I/ST16KVAO 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 leading provider of microcontrollers, analog components, and memory solutions, serving industrial, automotive, and communications markets with vertically integrated silicon and development tools.

The 24FC512 belongs to Microchip's high-speed I²C EEPROM product line, designed specifically for applications needing fast, reliable, and secure nonvolatile storage in resource-constrained embedded systems with stringent reliability requirements.

FAQ

What is the maximum I²C clock frequency supported by the 24FC512T-I/ST16KVAO?

The 24FC512T-I/ST16KVAO supports up to 1 MHz I²C clock frequency when V_CC is 2.5V or higher. At V_CC between 1.7V and 2.5V, the maximum clock frequency is 400 kHz. This dual-speed capability allows the 24FC512T-I/ST16KVAO to operate across wide voltage ranges while maintaining optimal throughput in both low-voltage and standard logic systems.

Does the 24FC512T-I/ST16KVAO require external pull-up resistors on SDA and SCL lines?

Yes, the 24FC512T-I/ST16KVAO requires external pull-up resistors on both SDA and SCL lines because its I/O pins are open-drain. For 1 MHz operation, a 2 kΩ pull-up to V_CC is recommended; for 400 kHz, 2.2 kΩ is typical. The 24FC512T-I/ST16KVAO does not include internal pull-ups, so omission will result in bus failure.

How does hardware write-protection work on the 24FC512T-I/ST16KVAO?

Hardware write-protection on the 24FC512T-I/ST16KVAO is controlled exclusively by the WP pin: when WP is tied to V_CC, all write operations (byte and page) are inhibited, though reads remain fully functional. The pin state is sampled at the Stop bit of each write command, and toggling WP mid-cycle has no effect. This provides unconditional, glitch-immune protection independent of firmware state.

What package type is used for the 24FC512T-I/ST16KVAO?

The 24FC512T-I/ST16KVAO uses an 8-lead SOIC (ST) package per JEDEC MS-012AC, with 150 mil body width, 0.150" lead pitch, and matte tin (Sn) plating. The "ST" in the part number explicitly denotes this SOIC variant, and the "16KVAO" suffix confirms tape-and-reel packaging with 16,000-unit reel quantity and vacuum-sealed moisture barrier bag.

Can multiple 24FC512T-I/ST16KVAO devices share the same I²C bus?

Yes, up to eight 24FC512T-I/ST16KVAO devices can share a single I²C bus using the A0, A1, and A2 address pins to configure unique 3-bit hardware addresses. Each device must have a distinct combination of these pins tied to V_SS or V_CC; floating address pins are not permitted and will cause bus contention or unpredictable selection.