Microchip Technology 24AA02H-I/P

Overview

24AA02H-I/P from Microchip Technology Inc. is a 2 Kbit I²C-compatible serial EEPROM organized as 256 × 8-bit memory with hardware write-protect for the upper half-array (80h–FFh), 1.7V to 5.5V operation, and industrial temperature range (–40°C to +85°C). It features Schmitt-trigger inputs, slope-controlled outputs, 8-byte page write buffer, and supports up to 400 kHz clock frequency at V_CC ≥ 2.5V.

For engineers reviewing the 24AA02H-I/P datasheet, 24AA02H-I/P pinout, 24AA02H-I/P application, or 24AA02H-I/P equivalent, this device serves as a low-power, AEC-Q100-qualified nonvolatile memory for secure device identification, calibration data storage, and configuration retention in space-constrained embedded systems.

Technical Context

The 24AA02H-I/P implements a two-wire I²C interface with fixed 7-bit client address (1010xxx) and R/W bit control, supporting byte and page write modes with self-timed erase/write cycles. Its internal Address Pointer enables current-address, random, and sequential read operations without external address latching.

Hardware write-protection is implemented via the WP pin: tied to V_CC, it disables writes to addresses 80h–FFh while permitting full read access; tied to V_SS, full read/write functionality is enabled. Pins A0–A2 are unconnected and may be left floating or tied to V_SS/V_CC with no functional impact.

Key Specifications

Pinout & Package

24AA02H-I/P is supplied in an 8-lead PDIP (Plastic Dual In-Line Package) with 300-mil body width, suitable for through-hole prototyping and legacy industrial PCBs. Pin 1 is marked by a notch or dot; leads are tin-plated matte finish per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA02H-I/P, 24LC02BH-I/P excludes 1.7V operation but shares identical packaging and I²C protocol, while AT24C02C-PU offers lower cost at the expense of granular write-protection capability - making 24AA02H-I/P optimal for secure, low-voltage, automotive-grade deployments.

Availability

24AA02H-I/P is available at Aetrix Electronics and suitable for industrial automation, automotive infotainment, and medical device design requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for 24AA02H-I/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 manufacturer specializing in microcontrollers, analog devices, and memory solutions, with global design centers and ISO 9001-certified fabrication facilities.

The 24AA02H family was designed specifically for secure, low-power, and AEC-Q100-qualified nonvolatile storage in automotive and industrial edge devices where reliability, voltage flexibility, and hardware-based data protection are critical.

FAQ

What is the minimum V_CC required for reliable operation of the 24AA02H-I/P?

The 24AA02H-I/P operates down to 1.7V across its full industrial temperature range (–40°C to +85°C), enabling compatibility with 1.8V logic families and ultra-low-power battery-powered systems. Below 1.7V, read/write functionality is not guaranteed per DS20002105B specifications.

How does the WP pin function on the 24AA02H-I/P?

When WP is tied to V_CC, writes to memory addresses 80h–FFh are inhibited while reads remain fully accessible; when tied to V_SS, full read/write access to the entire 256-byte array is enabled. This hardware-level protection requires no firmware intervention and persists across power cycles.

Can the 24AA02H-I/P be used in automotive applications?

Yes - the 24AA02H-I/P is AEC-Q100 qualified for automotive Grade 2 (–40°C to +105°C), has >4,000V HBM ESD rating, and supports extended temperature operation, making it suitable for infotainment, body control, and ADAS subsystems where robustness and qualification are mandatory.

What is the maximum I²C clock frequency supported by the 24AA02H-I/P?

The 24AA02H-I/P supports up to 400 kHz I²C clock frequency when V_CC is 2.5V or higher. At V_CC between 1.7V and 2.5V, the maximum clock rate is limited to 100 kHz to ensure timing margin compliance per AC characteristics table.

Are pins A0, A1, and A2 functional on the 24AA02H-I/P?

No - pins A0, A1, and A2 are not internally connected in the 24AA02H-I/P. They may be left floating or tied to V_SS/V_CC without affecting device operation, addressing, or I²C communication. The device uses a fixed 7-bit address (1010xxx) with the three LSBs as "don't care" bits.