Microchip Technology 24LC014H-E/P

Overview

24LC014H-E/P from Microchip Technology Inc. is a 1 Kbit (128 × 8) I²C-compatible serial EEPROM with hardware write protection for the upper half-array (addresses 40h–7Fh), rated for automotive temperature range (−40°C to +125°C), 2.5V–5.5V supply, and 1 MHz clock support. It features Schmitt-trigger inputs, slope-controlled outputs, 16-byte page write buffer, and 1 million erase/write cycles.

For engineers reviewing the 24LC014H-E/P datasheet, 24LC014H-E/P pinout, 24LC014H-E/P application, or 24LC014H-E/P equivalent, key selection considerations include its automotive-grade reliability, half-array hardware write-protect capability, 1 MHz I²C timing compliance at VCC ≥ 2.5V, and compatibility with standard 8-pin PDIP packaging.

Technical Context

The 24LC014H-E/P operates as an I²C slave device with fixed 4-bit control code '1010', three user-configurable chip-select bits (A0–A2), and R/W bit-driven operation mode. Its internal address pointer auto-increments during sequential reads and wraps from 07Fh to 000h.

Write operations support byte and page modes (up to 16 bytes per page), with self-timed internal write cycles (max 5 ms) and acknowledge polling for bus efficiency. Hardware write protection is activated when WP = VCC, locking addresses 40h–7Fh regardless of software commands.

Key Specifications

Pinout & Package

24LC014H-E/P is supplied in 8-pin PDIP (Plastic Dual In-line Package) with 300-mil width, RoHS-compliant matte tin lead finish, and standard through-hole mounting.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC014H-E/P, the 24LC014T-E/P offers identical functionality in tape-and-reel form for production lines, while the AT24C01D-SSHM-T trades automotive qualification and hardware write protection for broader voltage range and lower unit cost - making it viable only in non-automotive contexts.

Availability

24LC014H-E/P is available at Aetrix Electronics and suitable for automotive ECU development, telematics module production, and ADAS calibration storage requiring stable component supply across extended temperature and long product lifecycles.

Supply support for 24LC014H-E/P 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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory products, with broad automotive and industrial certification coverage.

The 24LC014H-E/P belongs to Microchip's automotive-qualified serial EEPROM product line, designed specifically for reliable nonvolatile data storage in harsh-temperature, safety-conscious vehicle subsystems.

FAQ

What is the maximum I²C clock frequency supported by the 24LC014H-E/P?

The 24LC014H-E/P supports up to 1 MHz I²C clock frequency when operated within its specified VCC range of 2.5V to 5.5V. This higher speed is enabled only for the 24LC014H variant (not the 24AA014H), and requires adherence to AC timing parameters including THIGH ≥ 500 ns and TLOW ≥ 500 ns. At lower voltages (<2.5V), the device defaults to 400 kHz or 100 kHz operation depending on VCC level.

How does the hardware write-protection feature work on the 24LC014H-E/P?

The 24LC014H-E/P uses the WP pin to enable hardware write protection for memory addresses 40h–7Fh (upper 64 bytes). When WP is tied to VCC, writes to this half-array are blocked at the silicon level - even if valid I²C commands are issued. Writes to addresses 00h–3Fh remain fully functional. If WP is tied to VSS, all 128 bytes are writable. This protection remains active during power-up and brownout conditions.

Is the 24LC014H-E/P pin-compatible with other 8-pin I²C EEPROMs like the 24C01 or AT24C01?

Yes, the 24LC014H-E/P uses the industry-standard 8-pin PDIP footprint and identical pin assignments (A0–A2, VSS, SDA, SCL, WP, VCC) as the 24C01 and AT24C01 families. However, functional compatibility requires verification of voltage range (2.5V–5.5V), clock speed (1 MHz), and write-protect behavior - the 24LC014H-E/P is not a drop-in replacement for devices lacking WP pin support or automotive qualification.

What is the page write capacity of the 24LC014H-E/P, and how does it affect memory addressing?

The 24LC014H-E/P supports page writes of up to 16 bytes per transaction, constrained by physical page boundaries aligned to 16-byte intervals (e.g., 00h–0Fh, 10h–1Fh). Attempting to cross a boundary causes wraparound within the same page. To avoid data corruption, firmware must calculate starting address modulo 16 and limit transfers accordingly - for example, writing 16 bytes starting at address 0Eh will overwrite bytes 0Eh–0Fh and 00h–0Dh.

Does the 24LC014H-E/P require external pull-up resistors on SDA and SCL lines?

Yes, the 24LC014H-E/P requires external pull-up resistors on both SDA and SCL lines because these pins use open-drain outputs. Recommended values are 2 kΩ for 1 MHz operation and 10 kΩ for 100 kHz - selected based on bus capacitance and rise-time requirements. Pull-ups must connect to the same VCC rail used by the device to ensure proper logic levels and noise margin.