Microchip Technology 24FC512-I/SN16KVAO

Overview

24FC512-I/SN16KVAO 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, 128-byte page write buffer, and industrial temperature range (–40°C to +85°C). It delivers ultra-low standby current (1 µA max) and supports cascading up to eight devices on a single bus for expanded memory addressing in embedded control systems.

For engineers reviewing the 24FC512-I/SN16KVAO datasheet, 24FC512-I/SN16KVAO pinout, 24FC512-I/SN16KVAO application, or 24FC512-I/SN16KVAO equivalent, key selection criteria include its 1 MHz I²C speed at V_CC ≥ 2.5V, hardware write-protect (WP) functionality, Schmitt-trigger noise immunity on SDA/SCL, and compatibility with standard 8-lead SOIC (SN) packaging used in space-constrained industrial PCBs.

Technical Context

The 24FC512-I/SN16KVAO implements a two-wire I²C interface with full protocol compliance-including Start/Stop condition generation, 7-bit slave addressing with A0–A2 chip select bits, and ACK polling for write-cycle completion detection. Its internal architecture includes a 128-byte page latch, HV generator for EEPROM programming, and memory control logic enabling byte and page writes with self-timed erase/write cycles.

It features Schmitt-trigger inputs on SDA and SCL pins (V_HYS = 0.05 V_CC) and slope-controlled outputs to suppress ground bounce. Timing parameters are specified across 1.7V–5.5V operation: T_LOW = 500 ns min and T_FALL = 100 ns max at 2.5V–5.5V, supporting high-speed 1 MHz bus operation without external timing constraints.

Key Specifications

Pinout & Package

24FC512-I/SN16KVAO is packaged in an 8-lead SOIC (SN) with standard 150 mil width, JEDEC MS-012AC compliant footprint, and matte tin (Sn) lead finish. Pin 1 is marked by a beveled corner or dot; package dimensions: 4.9 mm × 3.9 mm × 1.75 mm (L × W × H).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA512-I/SN and AT24C512BN-SH-T, the 24FC512-I/SN16KVAO uniquely combines 1 MHz speed, Schmitt-trigger noise rejection, and 1 µA standby current in a single industrial-grade SOIC-8 package-making it optimal for high-reliability, low-power, and high-throughput embedded storage.

Availability

24FC512-I/SN16KVAO is available at Aetrix Electronics and suitable for industrial PLC configuration storage, medical device calibration data retention, and automotive body control module applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for 24FC512-I/SN16KVAO 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 consumer markets with vertically integrated silicon and development tools.

The 24FC512 belongs to Microchip's high-speed serial EEPROM product line, designed specifically for applications demanding fast, reliable, and low-voltage non-volatile storage in space-constrained embedded systems.

FAQ

What is the maximum I²C clock frequency supported by the 24FC512-I/SN16KVAO?

The 24FC512-I/SN16KVAO supports up to 1 MHz I²C clock frequency when V_CC is 2.5V or higher. At V_CC < 2.5V, the maximum clock rate drops to 400 kHz. This dual-speed capability allows the 24FC512-I/SN16KVAO to maintain high throughput in 3.3V and 5V systems while remaining functional in ultra-low-voltage 1.8V designs. Timing parameters such as T_LOW and T_FALL are fully characterized for both ranges.

Does the 24FC512-I/SN16KVAO require external pull-up resistors on SDA and SCL lines?

Yes, the 24FC512-I/SN16KVAO requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. Recommended values are 2 kΩ for 1 MHz operation and 10 kΩ for 100 kHz. The exact value depends on bus capacitance and desired rise time; the 24FC512-I/SN16KVAO's Schmitt-trigger inputs tolerate slower edges, allowing flexibility in resistor selection for noise-prone layouts.

How does the Write-Protect (WP) pin function on the 24FC512-I/SN16KVAO?

The WP pin on the 24FC512-I/SN16KVAO is sampled at the Stop bit of each write command. When tied to VCC, it disables all write operations (byte and page) while permitting unrestricted reads. When tied to VSS, writes are enabled. The 24FC512-I/SN16KVAO does not latch WP state-toggling WP during a write cycle has no effect. This behavior makes the 24FC512-I/SN16KVAO ideal for protecting calibration data after initial programming.

Can multiple 24FC512-I/SN16KVAO devices share the same I²C bus?

Yes, up to eight 24FC512-I/SN16KVAO devices can operate on the same I²C bus using hardware-configurable chip addresses via A0, A1, and A2 pins. Each device responds only to its unique 7-bit slave address (1010xxxR/W), enabling scalable memory expansion to 4 Mbit without additional address decoding logic. The 24FC512-I/SN16KVAO's built-in address pointer auto-increments during sequential reads, simplifying multi-device data streaming.

What is the page write capability of the 24FC512-I/SN16KVAO?

The 24FC512-I/SN16KVAO features a 128-byte page write buffer, allowing up to 128 bytes to be loaded into the buffer before initiating a single self-timed write cycle. This reduces I²C bus occupancy and host CPU overhead compared to byte-wise writes. However, page writes must not cross 128-byte physical boundaries-software must align addresses and limit count to avoid wraparound. The 24FC512-I/SN16KVAO enforces this at the hardware level.