Microchip Technology 24LC512-E/SN16KVAO

Overview

24LC512-E/SN16KVAO from Microchip Technology Inc. is a 512 Kbit I²C-compatible serial EEPROM organized as 64K × 8-bit memory, operating from 2.5V to 5.5V with 400 µA max read current and 1 µA max standby current at industrial/extended temperature (–40°C to +125°C). It features hardware write-protection, 128-byte page write buffer, and Schmitt-trigger inputs for noise immunity in embedded control and data-logging systems.

For engineers reviewing the 24LC512-E/SN16KVAO datasheet, 24LC512-E/SN16KVAO pinout, 24LC512-E/SN16KVAO application, or 24LC512-E/SN16KVAO equivalent, key selection criteria include VCC range (2.5–5.5V), extended temperature support (–40°C to +125°C), 400 kHz I²C clock compatibility, 128-byte page write capability, and SOIC-8 (SN) package footprint compatibility.

Technical Context

The 24LC512-E/SN16KVAO implements a two-wire I²C interface with open-drain SDA/SCL pins requiring external pull-ups, supports up to eight devices on one bus via A0–A2 address inputs, and uses internal address pointer logic for sequential reads across the full 64K address space. Its EEPROM array is partitioned into 128-byte pages, enabling efficient bulk writes without crossing physical boundaries.

Write protection is controlled solely by the WP pin state (VSS = enabled, VCC = disabled), sampled at the Stop bit of each write command; no software lock or register configuration is involved. Acknowledge polling is supported to detect write cycle completion, eliminating fixed delay timing requirements in host firmware.

Key Specifications

Pinout & Package

24LC512-E/SN16KVAO is supplied in an 8-lead SOIC package (SN), with 1.27 mm pitch, 3.9 mm body width, and JEDEC MS-012AC compliant footprint. Pin 1 is marked by a beveled corner or notch.

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 24LC512-E/SN16KVAO uniquely combines extended temperature rating (–40°C to +125°C), hardware write-protect with active-high WP, and guaranteed 400 kHz operation across its full VCC range - making it optimal for automotive and high-reliability industrial deployments where thermal robustness and data security are non-negotiable.

Availability

24LC512-E/SN16KVAO is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical device manufacturing requiring stable component supply, long-lifecycle assurance, and AEC-Q100-compliant sourcing.

Supply support for 24LC512-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, headquartered in Chandler, Arizona, with global design, manufacturing, and sales operations.

The 24LC512 belongs to Microchip's serial EEPROM product line, engineered for high-reliability, low-power nonvolatile storage in automotive, industrial, and medical applications where extended temperature operation and hardware write protection are essential.

FAQ

What is the minimum supply voltage required for reliable operation of the 24LC512-E/SN16KVAO?

The 24LC512-E/SN16KVAO requires a minimum VCC of 2.5V for guaranteed operation across its full –40°C to +125°C extended temperature range. Unlike the 24AA512 variant, it does not support 1.7V operation. Below 2.5V, functionality is undefined and not characterized per DS20001754Q.

Does the 24LC512-E/SN16KVAO support 1 MHz I²C clock frequency?

No, the 24LC512-E/SN16KVAO is rated for a maximum clock frequency of 400 kHz at all valid VCC levels (2.5V–5.5V). The 1 MHz capability is exclusive to the 24FC512 variant; using higher frequencies with the 24LC512-E/SN16KVAO may result in timing violations and communication failures.

How does the WP pin function on the 24LC512-E/SN16KVAO, and when is it sampled?

The WP pin on the 24LC512-E/SN16KVAO is an active-high hardware write-protect input. It is sampled at the Stop bit of each write command - if WP = VCC, writes are inhibited (reads remain functional); if WP = VSS, full read/write access is enabled. Toggling WP after the Stop bit has no effect on an ongoing write cycle.

Can multiple 24LC512-E/SN16KVAO devices share the same I²C bus, and how is addressing managed?

Yes, up to eight 24LC512-E/SN16KVAO devices can share one I²C bus using the A0, A1, and A2 address inputs. Each device's 3-bit hardware address is set by tying these pins to VSS or VCC, forming the three LSBs of the 7-bit I²C client address (1010xxx). This enables contiguous 4 Mbit expansion when combined across devices.

What is the page write capability of the 24LC512-E/SN16KVAO, and what happens if more than 128 bytes are sent?

The 24LC512-E/SN16KVAO supports 128-byte page writes within a single physical page boundary. If more than 128 bytes are transmitted before the Stop condition, the address counter rolls over and overwrites earlier bytes in the same page - no automatic wrap to the next page occurs. Software must enforce page alignment to avoid unintended data corruption.