Microchip Technology 24LC01BH-E/SN

Overview

24LC01BH-E/SN from Microchip Technology Inc. is a 1 Kbit I²C-compatible serial EEPROM organized as 128 × 8-bit memory with half-array hardware write-protection (40h–7Fh), rated for automotive temperature range (−40°C to +125°C), operating from 2.5V to 5.5V, and supporting up to 400 kHz clock frequency. It delivers 1 μA max standby current and 1 mA max read current, enabling low-power data logging in automotive body control modules.

For engineers reviewing the 24LC01BH-E/SN datasheet, 24LC01BH-E/SN pinout, 24LC01BH-E/SN application, or 24LC01BH-E/SN equivalent, this page provides verified electrical parameters, validated pin functions across SOIC-8 packaging, confirmed write-protection behavior, endurance and retention specs, and real-world use cases in automotive and industrial systems requiring robust nonvolatile storage.

Technical Context

The 24LC01BH-E/SN implements a 2-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 auto-increment for sequential reads. Its architecture supports byte and page writes (up to 8 bytes per page), with ACK polling used to detect write-cycle completion.

Hardware write-protection is controlled solely by the WP pin: tied to VCC, it disables writes to addresses 40h–7Fh while allowing full read access; tied to VSS, full read/write operation is enabled. A0–A2 pins are unconnected and may be left floating or tied to VSS/VCC without functional impact.

Key Specifications

Pinout & Package

24LC01BH-E/SN is packaged in an 8-lead Plastic Small Outline (SOIC-8, 3.90 mm body), RoHS-compliant and Pb-free. Pin functions are electrically validated per DS22104A and consistent across all SOIC, PDIP, TSSOP, and MSOP variants of this part number.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC01BH-E/SN, the 24AA01H-I/SN trades automotive temperature rating for lower-voltage operation, while the AT24C01D-SSHM-T sacrifices hardware write-protection and automotive qualification for broader voltage flexibility and alternate sourcing - making 24LC01BH-E/SN the only option meeting AEC-Q100-relevant thermal and security requirements out-of-the-box.

Availability

24LC01BH-E/SN is available at Aetrix Electronics and suitable for automotive body control, industrial sensor nodes, medical infusion pumps, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 24LC01BH-E/SN 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, consumer, and communications markets with high-reliability silicon and development tools.

The 24LC01BH belongs to Microchip's serial EEPROM product line, designed specifically for automotive and industrial applications demanding extended temperature operation, hardware write-protection, and proven data retention under harsh environmental stress.

FAQ

What is the minimum supply voltage required for reliable operation of the 24LC01BH-E/SN?

The 24LC01BH-E/SN requires a minimum supply voltage of 2.5V for guaranteed operation across its full −40°C to +125°C automotive temperature range. Operation below 2.5V is not specified and may result in unreliable write cycles or data corruption, as confirmed in the Device Selection Table and Electrical Characteristics section of DS22104A.

Does the 24LC01BH-E/SN support standard I²C addressing, and what is its fixed slave address?

Yes, the 24LC01BH-E/SN supports standard I²C addressing with a fixed 4-bit control code of '1010' (0xA). The next three bits are "don't care", and the R/W bit determines operation - resulting in effective 7-bit slave addresses 0x50 (write) and 0x51 (read), as defined in Figure 4-2 and Section 4.6 of DS22104A.

How does hardware write-protection work on the 24LC01BH-E/SN, and which memory addresses are protected?

When the WP pin of the 24LC01BH-E/SN is tied to VCC, write operations to memory addresses 40h–7Fh (upper 512 bits) are inhibited; reads remain fully functional. Addresses 00h–3Fh remain writable. When WP is tied to VSS, full read/write access is enabled across the entire 128-byte array, as detailed in Section 2.4 and Section 7.0 of DS22104A.

What is the maximum supported I²C clock frequency for the 24LC01BH-E/SN, and under what conditions?

The 24LC01BH-E/SN supports a maximum I²C clock frequency of 400 kHz when VCC is between 2.5V and 5.5V, as specified in the Device Selection Table and AC Characteristics (Table 1-2, Param. No. 1). At VCC < 2.5V, operation is limited to 100 kHz - but this condition does not apply to the 24LC01BH-E/SN due to its 2.5V minimum rating.

Can the 24LC01BH-E/SN be used in systems requiring AEC-Q200 compliance?

The 24LC01BH-E/SN is rated for the automotive temperature range (−40°C to +125°C) and features >4 kV HBM ESD protection, robust noise immunity, and 200-year data retention - key attributes aligned with AEC-Q200 stress test requirements. While Microchip does not publish formal AEC-Q200 certification reports for this part, its automotive-grade qualification (E-temp suffix) and design intent support use in AEC-Q200-compliant systems when validated per customer qualification protocols.