Microchip Technology 25LC010AT-E/SN16KVAO

Overview

25LC010AT-E/SN16KVAO from Microchip Technology Inc. is a 1 Kbit (128 × 8) SPI Serial EEPROM with 16-byte page write capability, 10 MHz max clock frequency at 4.5–5.5 V, and automotive-grade temperature support (−40°C to +125°C). It features hardware write protection via WP pin, HOLD functionality for interrupt-safe bus suspension, and block-level write protection (none/¼/½/all array). Used in engine control units for calibration storage.

For engineers reviewing the 25LC010AT-E/SN16KVAO datasheet, 25LC010AT-E/SN16KVAO pinout, 25LC010AT-E/SN16KVAO application, or 25LC010AT-E/SN16KVAO equivalent, key selection criteria include automotive temperature rating, SPI interface timing compliance at 2.5–5.5 V, page write latency ≤5 ms, and hardware-based write protection with WP and STATUS register control.

Technical Context

The 25LC010AT-E/SN16KVAO implements a standard SPI Mode 0,0/Master-Slave interface with separate SI (data in), SO (data out), SCK (clock), CS (chip select), WP (write-protect), and HOLD (bus pause) signals. Its internal architecture includes an 8-bit instruction register, page latches, and high-voltage generator for EEPROM programming.

Write operations require explicit WREN instruction followed by CS high-to-low transition to initiate self-timed internal write cycle (TWC ≤5 ms); STATUS register polling (WIP bit) is required to confirm completion. Block protection is controlled nonvolatilely via BP0/BP1 bits in STATUS register, enabling selective locking of upper ¼, upper ½, or full memory array.

Key Specifications

Pinout & Package

25LC010AT-E/SN16KVAO is packaged in 8-lead SOIC (SN) with industry-standard pinout and Pb-free RoHS-compliant finish. The package measures 3.9 mm × 4.9 mm × 1.75 mm (max height) and uses standard JEDEC MS-012AC footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25LC010AT-E/SN16KVAO, the 25AA010AT-I/SN offers wider voltage range but lower temperature rating, while AT25010B-SSHL-T sacrifices HOLD and speed for lower unit cost - making the original optimal for safety-critical automotive subsystems demanding robustness and deterministic timing.

Availability

25LC010AT-E/SN16KVAO is available at Aetrix Electronics and suitable for engine control units, ADAS cameras, infotainment head units, and body control modules requiring stable component supply across extended automotive lifecycles.

Supply support for 25LC010AT-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, and Flash-IP solutions, serving automotive, industrial, and consumer markets with high-reliability silicon and development tools.

The 25LC010A family is designed specifically for automotive-grade nonvolatile data storage where SPI simplicity, hardware write protection, and extended temperature operation are mandatory - targeting ECU, telematics, and ADAS subsystems.

FAQ

What is the maximum clock frequency supported by the 25LC010AT-E/SN16KVAO across its full voltage range?

The 25LC010AT-E/SN16KVAO supports up to 10 MHz at VCC = 4.5–5.5 V, 5 MHz at VCC = 2.5–4.5 V, and 3 MHz at VCC = 1.8–2.5 V. However, the 25LC010AT-E/SN16KVAO is rated for 2.5–5.5 V only, so its operational maximum is 10 MHz at 4.5–5.5 V and 5 MHz at 2.5–4.5 V. These values are confirmed in Table 1-2 AC Characteristics of DS21832H.

Does the 25LC010AT-E/SN16KVAO support SPI Mode 1,1 or only Mode 0,0?

The 25LC010AT-E/SN16KVAO supports SPI Mode 0,0 only (CPOL = 0, CPHA = 0), as specified in Section 2.1 and Figure 1-2 of DS21832H. Data is sampled on the rising edge of SCK and output changes on the falling edge. Attempting Mode 1,1 will result in misaligned sampling and corrupted reads/writes.

How does the HOLD pin function during an active write cycle in the 25LC010AT-E/SN16KVAO?

The HOLD pin has no effect during an active internal write cycle (TWC) in the 25LC010AT-E/SN16KVAO. Once CS rises after a valid write sequence, the device enters autonomous programming mode and ignores HOLD, WP, SI, SO, and SCK until completion (~5 ms). HOLD only suspends ongoing SPI transfers - not committed write operations.

Can the 25LC010AT-E/SN16KVAO be used with a 1.8 V microcontroller I/O interface?

No - the 25LC010AT-E/SN16KVAO requires VCC ≥2.5 V and specifies VIH1 = 0.7×VCC minimum. At 2.5 V, VIH1 = 1.75 V, which exceeds typical 1.8 V logic high thresholds (≈1.35 V). Using it with 1.8 V I/O risks unreliable command recognition. For 1.8 V systems, the 25AA010A variant is appropriate.

What happens if a page write crosses a 16-byte boundary in the 25LC010AT-E/SN16KVAO?

If a page write command attempts to cross a 16-byte boundary (e.g., writing 16 bytes starting at address 0x0F), the 25LC010AT-E/SN16KVAO wraps the excess bytes back to the start of the same page (0x00–0x0F), overwriting prior data. This behavior is documented in Section 2.3 and Note on DS21832H page 6 - software must enforce page alignment.