Microchip Technology 24LC01BT-E/MNY

Overview

24LC01BT-E/MNY from Microchip Technology Inc. is a 1 Kbit I²C-compatible serial EEPROM organized as 128 × 8-bit memory with hardware write-protection, 8-byte page write buffer, and operation down to 2.5V. It supports 400 kHz clock frequency, delivers ≤1 mA active current and ≤5 µA extended-temperature standby current, and is qualified for automotive AEC-Q100 applications in industrial and extended temperature ranges (–40°C to +125°C).

For engineers reviewing the 24LC01BT-E/MNY datasheet, 24LC01BT-E/MNY pinout, 24LC01BT-E/MNY application, or 24LC01BT-E/MNY equivalent, key selection criteria include VCC range (2.5V–5.5V), E-temp qualification, MNY package (8-lead DFN), write-protection behavior, and I²C timing compliance at 400 kHz under extended temperature.

Technical Context

The 24LC01BT-E/MNY implements a 2-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal architecture includes an 8-byte page latch, HV generator for EEPROM programming, and address pointer logic supporting current-address, random, and sequential read modes.

It uses open-drain SDA/SCL with external pull-up resistors, requires no external components for basic operation, and relies on host-generated Start/Stop conditions and ACK polling to manage write-cycle completion. The WP pin enables full-array hardware write-protection when tied to VCC.

Key Specifications

Pinout & Package

24LC01BT-E/MNY is supplied in an 8-lead DFN (2 mm × 3 mm, 0.5 mm pitch) package with exposed pad. Pin 1 is A0 (NC), pin 4 is VSS, pin 5 is SDA, pin 6 is SCL, pin 7 is WP, and pin 8 is VCC. A0–A2 are unconnected and may be left floating or tied to VSS/VCC without functional impact.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC01BT-E/MNY, the 24LC01B-I/MNY offers lower standby current but sacrifices extended-temperature capability and automotive qualification, while the 24AA01T-I/MNY enables 1.7V operation but cannot replace it in AEC-Q100 or high-ambient applications.

Availability

24LC01BT-E/MNY is available at Aetrix Electronics and suitable for automotive body control units, industrial sensor nodes, medical infusion pumps, and smart energy meters requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for 24LC01BT-E/MNY 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 devices, and memory solutions, headquartered in Chandler, Arizona, with global manufacturing and support infrastructure.

The 24LC01B series was designed specifically for cost-sensitive, space-constrained applications requiring reliable nonvolatile storage in automotive and industrial environments - emphasizing low-power operation, hardware write protection, and robust I²C interoperability.

FAQ

What is the maximum I²C clock frequency supported by the 24LC01BT-E/MNY?

The 24LC01BT-E/MNY supports a maximum I²C clock frequency of 400 kHz across its full operating voltage range (2.5V–5.5V) and extended temperature range (–40°C to +125°C). It is not rated for 1 MHz operation - that capability is exclusive to the 24FC01 variant. This 400 kHz limit ensures timing margin for robust communication in electrically noisy automotive and industrial settings where the 24LC01BT-E/MNY is commonly deployed.

Does the 24LC01BT-E/MNY require external pull-up resistors on SDA and SCL lines?

Yes, the 24LC01BT-E/MNY requires external pull-up resistors on both SDA and SCL lines because it uses open-drain outputs. Typical values are 2 kΩ for 400 kHz operation and 10 kΩ for 100 kHz. These resistors ensure proper logic-high levels and meet I²C bus rise-time specifications. The 24LC01BT-E/MNY itself does not integrate internal pull-ups, so omitting them will result in communication failure.

How does the WP pin function on the 24LC01BT-E/MNY?

The WP (Write-Protect) pin on the 24LC01BT-E/MNY is a hardware-level enable/disable control for all write operations. When tied to VCC, the entire memory array (addresses 00h–7Fh) becomes write-protected - reads remain functional, but writes are ignored. When tied to VSS (or left floating, though not recommended), full read/write access is enabled. This pin operates independently of I²C commands and requires no firmware interaction.

Is the 24LC01BT-E/MNY pin-compatible with other 24XX01 family members in the MNY package?

Yes, the 24LC01BT-E/MNY is pin-compatible with all 24XX01 family variants (e.g., 24AA01T-I/MNY, 24FC01T-E/MNY) in the 8-lead DFN MNY package. A0–A2 are unconnected across the family, and SDA, SCL, WP, VSS, and VCC occupy identical positions. However, electrical differences - such as VCC range, max clock frequency, and temperature grade - mean direct substitution requires verification against system-level requirements.

What is the endurance and data retention specification for the 24LC01BT-E/MNY?

The 24LC01BT-E/MNY is specified for more than 1,000,000 erase/write cycles and greater than 200 years of data retention at +25°C. These values are characterized and ensured by Microchip's process and test methodology. Endurance is measured under worst-case conditions (25°C, 5.5V, page-mode writes), and retention accounts for activation energy modeling - making it suitable for applications where field updates are infrequent but long-term data integrity is mission-critical.