Microchip Technology AT24C08-10PI-1.8

Overview

AT24C08-10PI-1.8 from Microchip Technology (formerly Atmel) is an 8K-bit (1024 × 8) I²C-compatible serial EEPROM optimized for low-power, 1.8V–5.5V operation in space-constrained industrial and embedded systems. It features hardware write protection via the WP pin, 16-byte page write capability, Schmitt-trigger inputs for noise immunity, and supports 100 kHz clock frequency at 1.8V supply. It is commonly used for configuration storage in smart sensors and power management units.

For engineers reviewing the AT24C08-10PI-1.8 datasheet, AT24C08-10PI-1.8 pinout, AT24C08-10PI-1.8 application, or AT24C08-10PI-1.8 equivalent, key selection considerations include its 1.8V minimum operating voltage, 8-lead PDIP package with A2-only device addressing, 100-year data retention, 1 million write cycles, and compatibility with standard 2-wire I²C bus timing requirements.

Technical Context

The AT24C08-10PI-1.8 implements a fixed 8K-bit memory array organized as 1024 words of 8 bits each, internally segmented into 64 pages of 16 bytes. It uses a standard I²C protocol with open-drain SDA and active-high SCL, requiring external pull-ups. Device addressing relies solely on the A2 pin (A1 and A0 are NC), enabling up to two AT24C08 devices per bus.

Its 100 kHz maximum clock rate at 1.8V is defined by tLOW ≥ 4.7 µs and tHIGH ≥ 4.0 µs, with input filtering and Schmitt-trigger thresholds ensuring robust operation in electrically noisy environments. Write operations are self-timed with a maximum 5 ms cycle time, during which all inputs are ignored until completion.

Key Specifications

Pinout & Package

AT24C08-10PI-1.8 is housed in an 8-lead PDIP (Plastic Dual Inline Package), 0.300" wide body, with through-hole mounting and JEDEC MS-001 compliant dimensions. Pin 1 is marked by a notch or dot at the top-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C08-10PI-1.8, the AT24C08A-10PI-1.8 offers improved long-term manufacturability and ESD robustness without design changes, while M24C08-RMN6TP provides footprint flexibility and vendor diversification - both retain identical 1.8V/100 kHz operation and 8K memory architecture.

Availability

AT24C08-10PI-1.8 is available at Aetrix Electronics and suitable for industrial automation, smart metering, and embedded sensor applications requiring stable component supply, long-lifecycle support, and proven reliability in harsh environments.

Supply support for AT24C08-10PI-1.8 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 is a global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with a focus on embedded control and connectivity.

The AT24C08-10PI-1.8 belongs to Microchip's legacy AT24C serial EEPROM family, designed specifically for cost-sensitive, low-power, and space-constrained applications requiring reliable, byte-addressable nonvolatile storage.

FAQ

What is the maximum I²C clock frequency supported by AT24C08-10PI-1.8 at 1.8V?

The AT24C08-10PI-1.8 supports a maximum I²C clock frequency of 100 kHz when operated at VCC = 1.8V. This is specified in the AC Characteristics table under "1.8-volt" column for fSCL. Higher frequencies (up to 400 kHz) require VCC ≥ 2.5V, making the 100 kHz limit critical for true 1.8V-only system designs. The AT24C08-10PI-1.8 meets this requirement with tLOW ≥ 4.7 µs and tHIGH ≥ 4.0 µs timing margins.

How many devices can share the same I²C bus with AT24C08-10PI-1.8?

Up to two AT24C08-10PI-1.8 devices can be addressed on a single I²C bus. This is because only the A2 pin is used for device addressing (A0 and A1 are NC), providing one binary bit - resulting in two possible 7-bit slave addresses: 0x50 and 0x51. Each device must have A2 hard-wired to either GND or VCC to avoid address collision. The AT24C08-10PI-1.8 does not support additional addressing beyond this constraint.

What is the function of the WP pin on AT24C08-10PI-1.8?

The WP (Write Protect) pin on AT24C08-10PI-1.8 is an active-high hardware enable that locks the entire memory array against write operations when pulled high to VCC. When tied to GND, full read/write access is permitted. Unlike software-based protection, WP provides unconditional, power-cycle-persistent write inhibition - essential for safeguarding critical firmware parameters or security keys. The AT24C08-10PI-1.8 implements this feature without internal latches or configuration registers.

Is AT24C08-10PI-1.8 suitable for automotive applications?

The AT24C08-10PI-1.8 is rated for industrial temperature range (-40°C to +85°C) and carries Automotive Grade qualification per manufacturer documentation, including lead-free/halogen-free construction. However, it is not AEC-Q200 qualified out-of-the-box. For automotive applications requiring formal qualification, Microchip recommends the AT24C08A-10PI-1.8 variant, which offers optional AEC-Q200 Grade 2 certification. The AT24C08-10PI-1.8 remains appropriate for non-safety-critical automotive subsystems like infotainment configuration storage.

What package type does AT24C08-10PI-1.8 use, and what are its key mechanical features?

AT24C08-10PI-1.8 uses an 8-lead PDIP (Plastic Dual Inline Package) with 0.300" body width, JEDEC MS-001 compliant footprint, and through-hole mounting. Key mechanical features include 0.100" lead pitch, 0.355"–0.400" body length (D), 0.300"–0.325" body width (E), and 0.115"–0.150" lead length (L). Its robust through-hole construction supports high-vibration environments and manual prototyping, distinguishing it from surface-mount variants like SOIC or TSSOP used in the same AT24C08 family.