Microchip Technology AT24C01C-CUM-T

Overview

AT24C01C-CUM-T from Microchip Technology is a 1-Kbit (128 × 8) I²C-compatible serial EEPROM IC designed for nonvolatile data storage in space-constrained, low-power embedded systems. It operates from 1.7V to 5.5V, supports Standard (100 kHz), Fast (400 kHz), and Fast Mode Plus (1 MHz) I²C speeds, and features hardware write protection via the WP pin - enabling reliable parameter retention in industrial control modules.

For engineers reviewing the AT24C01C-CUM-T datasheet, AT24C01C-CUM-T pinout, AT24C01C-CUM-T application, or AT24C01C-CUM-T equivalent, key selection considerations include its 8-pin UDFN package, 5 ms max self-timed write cycle, 1,000,000 write endurance, -40°C to +85°C industrial temperature range, and compatibility with multi-device I²C bus configurations using A0–A2 address inputs.

Technical Context

The AT24C01C-CUM-T functions as an I²C slave device with fixed 7-bit device address prefix 1010b and three programmable hardware address bits (A0–A2), supporting up to eight devices on a shared bus. Its memory is organized as 16 pages of 8 bytes each, enabling partial page writes and sequential/random read operations.

It integrates Schmitt-triggered, noise-filtered SDA/SCL inputs, open-drain bidirectional I/O, internal power-on reset (POR), and a dedicated Write-Protect (WP) pin that disables all writes when pulled high. The device enters low-power Standby mode (<6 μA at 5.5V) after Stop conditions or write completion.

Key Specifications

Pinout & Package

AT24C01C-CUM-T is supplied in an 8-pad UDFN (Ultra Thin Dual Flat No-lead) package, 2.0 mm × 1.6 mm × 0.55 mm body, wettable flank capable, RoHS-compliant, with exposed pad (recommended connected to GND).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C01D-SSHM-T, AT24C01C-CUM-T saves board space via UDFN while maintaining identical electrical behavior; versus M24C01-RMN6TP, it offers broader voltage-range FM+ support (2.5–5.5V vs. 2.5–5.5V) and simpler address compatibility, though at higher standby current.

Availability

AT24C01C-CUM-T is available at Aetrix Electronics and suitable for industrial sensor calibration, IoT edge device configuration, and automotive body control modules requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for AT24C01C-CUM-T 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 leading provider of microcontroller, analog, FPGA, and memory solutions, with a focus on embedded control and connectivity.

The AT24Cxx series delivers cost-optimized, low-power I²C EEPROMs targeting industrial, automotive, and consumer applications where reliable, byte-addressable nonvolatile storage is essential.

FAQ

What is the package type and dimensions of the AT24C01C-CUM-T?

The AT24C01C-CUM-T uses an 8-pad UDFN (Ultra Thin Dual Flat No-lead) package measuring 2.0 mm × 1.6 mm × 0.55 mm with a wettable flank profile. The exposed thermal pad is recommended to be connected to GND for improved thermal performance and solder joint reliability. This compact footprint supports high-density PCB layouts in space-constrained applications such as wearables and sensor nodes.

Does the AT24C01C-CUM-T support I²C Fast Mode Plus (1 MHz), and what voltage range applies?

Yes, the AT24C01C-CUM-T supports I²C Fast Mode Plus at up to 1 MHz, but only when VCC is between 2.5V and 5.5V. Below 2.5V, it operates in Fast Mode (400 kHz) or Standard Mode (100 kHz). This dual-speed capability allows designers to maximize throughput in higher-voltage subsystems while retaining compatibility with 1.8V logic domains using slower clock rates.

How does the Write-Protect (WP) pin function on the AT24C01C-CUM-T?

When the WP pin of the AT24C01C-CUM-T is driven high (to VCC), all write operations - including byte, page, and erase - are inhibited across the entire 1-Kbit memory array. When WP is grounded or left floating (internally pulled down), normal write functionality is enabled. This hardware-level protection prevents accidental overwrites during power-up, reset, or firmware updates without requiring software intervention.

What is the maximum write endurance and data retention specification for the AT24C01C-CUM-T?

The AT24C01C-CUM-T guarantees 1,000,000 write/erase cycles and 100 years of data retention at 55°C. These specifications are validated per JEDEC standards and reflect actual cell-level performance under industrial operating conditions - not extrapolated estimates. The endurance rating applies to both byte and page write modes, and retention holds even after repeated cycling.

Can multiple AT24C01C-CUM-T devices share the same I²C bus, and how is addressing managed?

Yes, up to eight AT24C01C-CUM-T devices can coexist on a single I²C bus using hardware address pins A0, A1, and A2. Each pin configures one bit of the 3-bit slave address suffix (1010b + A2A1A0), yielding addresses 0xA0–0xA7. All pins default to logic low if unconnected due to internal strong pull-downs, so explicit routing to GND or VCC is required for deterministic multi-device operation.