Microchip Technology 24LC512T-E/SN16KVAO

Overview

24LC512T-E/SN16KVAO from Microchip Technology Inc. is a 512 Kbit I²C-compatible serial EEPROM organized as 64K × 8-bit, operating from 2.5V to 5.5V with industrial/extended temperature range (–40°C to +125°C), 400 kHz max clock frequency, and hardware write-protect via WP pin. It supports cascaded bus configurations up to eight devices and delivers 1 µA standby current for low-power embedded storage in automotive and industrial control systems.

For engineers reviewing the 24LC512T-E/SN16KVAO datasheet, 24LC512T-E/SN16KVAO pinout, 24LC512T-E/SN16KVAO application, or 24LC512T-E/SN16KVAO equivalent, this page provides verified electrical specifications, SOIC-8 package mapping, I²C timing compliance (400 kHz at VCC ≥ 2.5V), page write buffer behavior (128-byte), and real-world endurance (1M cycles) and data retention (>200 years) metrics.

Technical Context

The 24LC512T-E/SN16KVAO implements a two-wire I²C interface with Schmitt-trigger inputs on SDA and SCL for noise immunity, slope-controlled outputs to suppress ground bounce, and internal address pointer logic enabling current-address, random, and sequential read modes across the full 0x0000–0xFFFF address space. Its cascading architecture uses A0–A2 pins to configure one of eight device addresses (1010xxxR/W).

Write operations are self-timed and support byte or page mode (up to 128 bytes per page write), with hardware write-protection activated when WP = VCC. Acknowledge polling is supported to detect write cycle completion, and the device samples WP at the Stop bit - toggling WP mid-cycle has no effect.

Key Specifications

Pinout & Package

24LC512T-E/SN16KVAO is packaged in an 8-lead SOIC (SN) with gull-wing leads, 3.9 mm body width, and JEDEC MS-012AC compliant footprint. The package supports reflow soldering and is RoHS-compliant.

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-B, the 24LC512T-E/SN16KVAO uniquely combines AEC-Q100 qualification, –40°C to +125°C operation, and hardware write protection - making it the only option among the three validated for under-hood automotive use and high-ambient industrial control.

Availability

24LC512T-E/SN16KVAO is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC configuration storage, medical infusion pump calibration, and smart energy meter firmware logging requiring stable component supply and long-term lifecycle support.

Supply support for 24LC512T-E/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, FPGA, and memory solutions, serving automotive, industrial, communications, and consumer markets with vertically integrated silicon and software platforms.

The 24LC512T-E/SN16KVAO belongs to Microchip's serial EEPROM product line, designed specifically for robust, low-power, I²C-based nonvolatile storage in harsh environments including automotive and extended-temperature industrial applications.

FAQ

What is the maximum I²C clock frequency supported by the 24LC512T-E/SN16KVAO?

The 24LC512T-E/SN16KVAO supports a maximum I²C clock frequency of 400 kHz when VCC is 2.5V or higher. At VCC < 2.5V, the maximum clock drops to 100 kHz. This specification is confirmed in Table 1-2 of the DS20001754Q datasheet and applies directly to the 24LC512 variant - not the 24AA512 or 24FC512 derivatives. The 24LC512T-E/SN16KVAO does not support 1 MHz operation.

Does the 24LC512T-E/SN16KVAO support hardware write protection, and how is it implemented?

Yes, the 24LC512T-E/SN16KVAO implements hardware write protection via the WP (Write-Protect) pin. When WP is tied to VCC, all write operations (byte and page) are inhibited while read operations remain fully functional. The WP state is sampled only at the Stop condition of each write command - toggling WP during an ongoing write cycle has no effect. This behavior is explicitly documented in Section 6.3 and Figure 1-1 of the DS20001754Q datasheet for the 24LC512T-E/SN16KVAO.

What package type is used for the 24LC512T-E/SN16KVAO, and what are its key mechanical dimensions?

The 24LC512T-E/SN16KVAO uses an 8-lead SOIC (Small Outline Integrated Circuit) package designated "SN" per Microchip's packaging nomenclature. Its body width is 3.90 mm, lead pitch is 1.27 mm (0.050"), and overall length is 4.90 mm. The package complies with JEDEC MS-012AC and is RoHS-compliant. Marking includes "24LC512I" followed by date code and traceability characters, as shown in Figure 9-1 of DS20001754Q.

How many devices can be connected on the same I²C bus using the 24LC512T-E/SN16KVAO?

Up to eight 24LC512T-E/SN16KVAO devices can be connected on the same I²C bus using the A0, A1, and A2 address pins. These three pins form the three least-significant bits of the 7-bit I²C slave address (1010xxx), allowing unique addressing from 1010000 to 1010111. Each pin must be hardwired to either VSS or VCC - floating connections are not permitted. This capability is confirmed in Section 2.1 and Table 5-1 of the DS20001754Q datasheet.

What is the page write buffer size and endurance rating of the 24LC512T-E/SN16KVAO?

The 24LC512T-E/SN16KVAO features a 128-byte page write buffer and is rated for 1,000,000 erase/write cycles at 25°C and VCC = 5.5V (page mode). Endurance is specified per page, not per byte, because partial-page writes cause full-page refresh. Data retention exceeds 200 years under normal operating conditions. These values are explicitly stated in the Features section and Table 1-1 of the DS20001754Q datasheet for the 24LC512 variant.