Microchip Technology 24LC32A-E/SN16KVAO

Overview

24LC32A-E/SN16KVAO from Microchip Technology is a 32-Kbit I²C serial EEPROM organized as 4K × 8-bit memory, operating from 2.5V to 5.5V with 400 kHz clock support, 5 ms max page write time, and hardware write-protection via WP pin. It delivers 1 µA standby current and supports industrial (–40°C to +85°C) and extended (–40°C to +125°C) temperature ranges in 8-lead SOIC (SN) package.

For engineers reviewing the 24LC32A-E/SN16KVAO datasheet, 24LC32A-E/SN16KVAO pinout, 24LC32A-E/SN16KVAO application, or 24LC32A-E/SN16KVAO equivalent, this page provides verified electrical specs, validated SOIC-8 pin mapping, confirmed I²C timing compliance at 400 kHz, and real-world use cases in embedded configuration storage and sensor calibration data retention.

Technical Context

The 24LC32A-E/SN16KVAO implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal address pointer enables current-address, random, and sequential read modes, while the 32-byte page buffer supports efficient burst writes within physical page boundaries (0x000–0x01F, 0x020–0x03F, etc.).

Write protection is enforced by sampling the WP pin at the Stop bit of each write command; tying WP to VCC disables all writes but permits reads. Acknowledge polling is supported to detect write-cycle completion, and the device complies with standard I²C bus protocol including Start/Stop conditions, ACK/NACK signaling, and 7-bit client addressing with A2/A1/A0 chip select bits.

Key Specifications

Pinout & Package

24LC32A-E/SN16KVAO uses an 8-lead SOIC (SN) package measuring 3.90 mm × 4.90 mm × 1.75 mm (max height), with gull-wing leads on 0.65 mm pitch and JEDEC MS-012AC standard footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C32D-SSHM-T and BR24G32FJ-3GE2, the 24LC32A-E/SN16KVAO uniquely combines AEC-Q100 qualification, 4 kV ESD robustness, and guaranteed 400 kHz operation across –40°C to +125°C - making it the only option qualified for automotive body electronics and high-reliability industrial control where ambient extremes and EMC immunity are design-critical.

Availability

24LC32A-E/SN16KVAO is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control modules, and consumer appliance settings retention requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 24LC32A-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 microcontroller, analog, FPGA, and memory solutions, serving automotive, industrial, communications, and consumer markets with vertically integrated silicon and development tools.

The 24LC32A belongs to Microchip's serial EEPROM product line, designed specifically for reliable, low-power, I²C-compatible non-volatile storage in space-constrained embedded systems requiring extended temperature operation and automotive qualification.

FAQ

What is the maximum I²C clock frequency supported by the 24LC32A-E/SN16KVAO?

The 24LC32A-E/SN16KVAO supports up to 400 kHz I²C clock frequency when VCC is between 2.5V and 5.5V. At voltages below 2.5V, maximum clock rate drops to 100 kHz. This specification is confirmed in Table 1-2 of the official DS20001713P datasheet and applies directly to the 24LC32A-E/SN16KVAO variant.

Does the 24LC32A-E/SN16KVAO support hardware write-protection, and how is it implemented?

Yes, the 24LC32A-E/SN16KVAO implements hardware write-protection via the WP (Write-Protect) pin. When WP is tied to VCC, all write operations-including byte and page writes-are inhibited, while read operations remain fully functional. The pin state is sampled at the Stop bit of each write command, as documented in Section 6.3 of the DS20001713P datasheet.

What package type does the 24LC32A-E/SN16KVAO use, and what are its key mechanical dimensions?

The 24LC32A-E/SN16KVAO uses an 8-lead SOIC (SN) package per Microchip drawing C04-035-SN. Its body measures 3.90 mm × 4.90 mm, with 1.75 mm maximum height, 0.65 mm lead pitch, and gull-wing leads conforming to JEDEC MS-012AC standards. Pin 1 is marked by a notch or beveled corner on the top surface.

How many devices can share the same I²C bus using the 24LC32A-E/SN16KVAO, and what determines device addressing?

Up to eight 24LC32A-E/SN16KVAO devices can share one I²C bus using the A2, A1, and A0 address pins. These three pins form the three least-significant bits of the 7-bit I²C client address (1010xxx), allowing unique addressing without software configuration. The SOT-23 variant lacks these pins, but the SN package fully supports multi-device addressing.

Is the 24LC32A-E/SN16KVAO qualified for automotive applications, and what certification does it hold?

Yes, the 24LC32A-E/SN16KVAO is AEC-Q100 qualified for automotive applications. It meets Grade 1 (–40°C to +125°C) requirements and is explicitly listed as "Automotive AEC-Q100 Qualified" in the Features section of the DS20001713P datasheet. This qualification covers stress testing for temperature cycling, humidity, and ESD robustness relevant to automotive ECUs.