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AT24C512C-SSHD-T

512-Kbit I2C EEPROM, 1 MHz, 128B page, 1M cycles, 100yr retention, SOIC-8

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Manufacturer Part：

AT24C512C-SSHD-T

Package：

SOIC-8 (3.91 x 4.90 mm)

Description

Product Overview

The AT24C512C-SSHD-T from Microchip Technology is a 512-Kbit (64K x 8) I2C-compatible serial EEPROM in an 8-pin SOIC package. It supports 1 MHz clock frequency, 128-byte page write mode, and features 1 million write cycle endurance with 100-year data retention. The device operates from 2.5 V to 5.5 V over the industrial temperature range.

Key Specifications

Memory Density	512 Kbit (64K x 8)
Interface	I2C (2-wire serial)
Max Clock Frequency	1 MHz (2.5 V to 5.5 V)
Page Size	128 bytes
Write Cycle Time	5 ms max (self-timed)
Write Endurance	1,000,000 cycles
Data Retention	100 years
Supply Voltage	2.5 V to 5.5 V
Operating Temperature	-40°C to 85°C

Features

512 Kbit organized as 65,536 x 8 bytes
Standard and Fast-mode Plus I2C (1 MHz)
128-byte page write with partial page write support
Hardware write-protect pin for full array protection
Schmitt trigger filtered inputs for noise suppression
Cascadable: up to 8 devices on a single I2C bus
Self-timed write cycle (5 ms max)
Ultra-low standby current: 6 uA max

Applications

Industrial and consumer nonvolatile parameter storage
Calibration data and configuration tables
System identification and serial number storage
Data logging in battery-powered devices

Product Introduction:AT24C512C-SSHD-T Product Introduction

The AT24C512C-SSHD-T from Microchip Technology is a 512-Kbit serial EEPROM that provides 65,536 bytes of nonvolatile storage using a standard I2C two-wire interface. The device supports Fast-mode Plus I2C at up to 1 MHz clock frequency when operating from 2.5 V to 5.5 V, enabling rapid data transfers in high-performance systems. The 128-byte page write mode allows efficient bulk programming, with partial page writes supported for flexible data storage. Schmitt trigger inputs with noise filtering ensure reliable communication in electrically noisy industrial environments. The hardware write-protect (WP) pin provides a physical mechanism to protect the entire memory array from accidental writes during system operation. With an endurance specification of 1 million write cycles and 100-year data retention, the AT24C512C-SSHD-T provides exceptional reliability for critical parameter and calibration data storage. The cascadable address scheme allows up to eight devices to share a single I2C bus, providing up to 4 Mbit total nonvolatile storage.

Working Principle:AT24C512C-SSHD-T Working Principle

The AT24C512C-SSHD-T operates through four functional subsystems: (1) The I2C interface handles all communication with the host controller via SDA and SCL lines. The device responds to the standard AT24C EEPROM address format: a 1010 device type identifier followed by three address bits (A2, A1, A0) that select one of up to eight devices on the bus, and a read/write bit. Schmitt trigger inputs with filtering suppress noise on the bus lines. (2) The address decoder receives the 16-bit memory address sent after the device address byte and selects the corresponding location in the 65,536-byte array. The two-byte address supports the full 512 Kbit density. (3) The memory array consists of 512 pages of 128 bytes each. During a page write operation, up to 128 bytes are loaded into an internal page buffer and then programmed to the nonvolatile array in a self-timed 5 ms cycle. Partial page writes are supported, and bytes within the same page can be written individually. (4) The write-protect logic monitors the WP pin. When WP is tied high, all write operations to the entire array are blocked, providing hardware-level data protection against accidental corruption.

Pin Description:AT24C512C-SSHD-T Pin Definition and Functions

Pin No.	Pin Name	Function
1	A0	Address input 0; sets device I2C slave address bit
2	A1	Address input 1; sets device I2C slave address bit
3	A2	Address input 2; sets device I2C slave address bit
4	GND	Ground
5	SDA	Serial data (bidirectional, open-drain)
6	SCL	Serial clock input
7	WP	Write-protect input; tie high to protect entire array
8	VCC	Supply voltage (2.5 V to 5.5 V)

Application Scenarios:In which products and applications isAT24C512C-SSHD-T used

Industrial control systems storing calibration coefficients and configuration parameters that must survive power cycles with 100-year data retention and 1M write cycle endurance
Multi-sensor data logging applications where 64 KB of nonvolatile storage accommodates extensive event records and the 1 MHz I2C bus enables rapid data retrieval
System identification modules storing serial numbers, manufacturing data, and device certificates with hardware write-protect preventing unauthorized modification
Consumer electronics with cascaded I2C buses where multiple AT24C512C devices provide scalable nonvolatile storage up to 4 Mbit on a single bus

Alternative Models:What chips are recommended as replacements for AT24C512C-SSHD-T

Model	Brand	Density	Max Freq	Page Size
AT24C256C-SSHL-T	Microchip	256 Kbit	1 MHz	64 B
AT24CM01-SSHL-T	Microchip	1 Mbit	1 MHz	256 B
24LC512-I/SN	Microchip	512 Kbit	400 kHz	128 B
BR24G512FJ-3AGE2	Rohm	512 Kbit	1 MHz	128 B
M24M01-RMN6TP	ST	1 Mbit	1 MHz	256 B