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Microchip Technology AT24C1024-10CI-2.7
- Part No.:
- AT24C1024-10CI-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TDFN
- Datasheet:
-
AT24C1024-10CI-2.7.pdf
- Description:
- IC EEPROM 1MBIT I2C 1MHZ 8LAP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT24C1024-10CI-2.7 from Microchip Technology (formerly Atmel) is a 1 Mbit (131,072 × 8) two-wire serial EEPROM with 2.7V to 5.5V operation, 400 kHz clock rate at 2.7V, hardware write protection via WP pin, and 256-byte page write capability. It serves as nonvolatile configuration storage in embedded controllers, industrial sensors, and power management units requiring reliable data retention over 40 years.
For engineers reviewing the AT24C1024-10CI-2.7 datasheet, AT24C1024-10CI-2.7 pinout, AT24C1024-10CI-2.7 application, or AT24C1024-10CI-2.7 equivalent, key selection criteria include its 2.7V low-voltage compatibility, 100,000 write cycles per page, 8-lead LAP (8CN3) package, Schmitt-triggered noise-immune inputs, and cascading support for up to two devices on one I²C bus.
Technical Context
The AT24C1024-10CI-2.7 implements a standard I²C-compatible two-wire interface with open-drain SDA and edge-triggered SCL, supporting both byte and 256-byte page writes. Its internal address counter enables current-address and sequential reads without retransmitting the address.
Device addressing uses a fixed 7-bit base plus one hardware-selectable A1 bit, allowing two devices on the same bus. The WP pin provides hardware-level write inhibition when tied to VCC, while floating defaults to GND enabling writes - a design choice critical for field-upgrade safety and factory programming workflows.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1,048,576 bits (131,072 × 8), sufficient for firmware boot parameters, calibration tables, or device identity storage |
| Supply Voltage | 2.7V to 5.5V - supports direct interfacing with 3.3V microcontrollers without level shifting |
| Write Cycle Time | 10 ms max - defines minimum interval between successive write commands; self-timed and non-blocking after ACK polling |
| Endurance | 100,000 write cycles per page - enables daily logging over 270+ years before wear-out at worst-case usage |
| Data Retention | 40 years at +85°C - ensures long-term validity of stored calibration or security keys in unpowered systems |
| I²C Clock Rate | 400 kHz at 2.7V - sets maximum throughput of ~40 kB/s for bulk page writes under low-voltage conditions |
| Input Capacitance | SDA: 8 pF, SCL/A1: 6 pF - constrains maximum bus length and pull-up resistor selection for signal integrity |
Pinout & Package
AT24C1024-10CI-2.7 is packaged in an 8-lead Leadless Array Package (LAP), designated 8CN3 (6.0 × 5.0 × 1.04 mm body, 1.27 mm pitch), optimized for space-constrained PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Internally unconnected; must remain floating or grounded per layout guidelines - no routing required |
| 2 (A1) | Device Address Input | Selects LSB of 7-bit device address; hardwired high/low or left floating (default low) to enable dual-device bus sharing |
| 3 (NC) | No Connect | Internally unconnected; no electrical function - avoid routing or soldering |
| 4 (GND) | Ground Reference | Primary return path for all internal circuitry; requires low-impedance connection to system ground plane |
| 5 (VCC) | Power Supply | 2.7–5.5V supply input; decoupling capacitor (0.1 µF ceramic) mandatory within 5 mm of pin |
| 6 (WP) | Hardware Write Protect | Active-high inhibit: tie to VCC to lock entire memory; tie to GND or leave floating for normal write access |
| 7 (SCL) | Serial Clock Input | Positive-edge sampled clock for I²C transactions; requires external pull-up and meets tLOW/tHIGH timing at 400 kHz |
| 8 (SDA) | Bi-directional Data I/O | Open-drain bus line shared across multiple devices; requires external pull-up and supports wire-OR logic |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Enables robust operation in electrically noisy environments (e.g., motor drives, power supplies) by rejecting sub-threshold noise on SCL/SDA |
| Page write mode | 256-byte burst writes reduce I²C transaction overhead by >95% vs. individual byte writes - critical for fast firmware updates |
| Address rollover handling | Automatic wraparound during sequential read/write prevents address overflow faults - simplifies host driver development |
| ACK polling support | Allows host to detect write completion without fixed delays - improves system responsiveness and eliminates blind waiting |
| Internal device reset recovery | Recovers from bus glitches or power loss via 9-clock reset sequence - eliminates need for external POR circuitry |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing temperature-compensation coefficients and sensor offset values in factory-calibrated pressure transducers operating in harsh environments. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed at power-on reset; retains data across 10+ year product lifecycle without battery backup. Use Value: Eliminates manual recalibration; enables traceable, field-upgradable calibration tables with 40-year data retention guarantee. | Use Scenario: Holding patient-specific therapy settings and device serialization data in portable infusion pumps compliant with IEC 62304. IC Role / Device Role / Timing Role: Secure configuration vault with hardware write-protection (WP pin tied to VCC during operation) preventing accidental overwrite of safety-critical parameters. Use Value: Meets Class C software safety requirements by ensuring immutable runtime configuration; supports audit-ready change history via page-level endurance rating. |
| Smart Energy Meter Firmware | Automotive Body Control Module |
Use Scenario: Storing tariff schedules, metering constants, and tamper-event logs in ANSI C12.22-compliant electricity meters exposed to wide temperature swings. IC Role / Device Role / Timing Role: High-reliability data logger with 100,000 write cycles per page - withstands daily time-of-use updates for >270 years. Use Value: Avoids FRAM cost premium while meeting ANSI 12.22 durability requirements; 2.7V operation ensures functionality during brownout conditions. | Use Scenario: Saving seat position memory, mirror presets, and door-lock configuration in 12V automotive BCMs with load-dump immunity. IC Role / Device Role / Timing Role: Low-voltage EEPROM interfaced directly to 3.3V MCU I²C port; WP pin controlled by MCU GPIO for selective write-enable during service mode. Use Value: Enables OEM personalization without additional voltage translators; -40°C to +85°C rating matches under-hood thermal envelope. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95M01-RDW6TP | 1 Mbit SPI interface (not I²C); 5 MHz max clock; 5 ms write cycle; SO8 package only | Requires SPI-capable MCU; incompatible with existing I²C bus topology and firmware drivers | Select only if migrating from I²C to SPI architecture and redesigning PCB layout and firmware stack |
| 24AA1025-I/P | Same 1 Mbit I²C EEPROM but in PDIP-8; 1 MHz clock at 5V; identical pinout except NC pins relocated | Direct drop-in replacement for through-hole prototyping or legacy PDIP-based designs; same A1/WP/SDA/SCL functions | Choose for hand-soldered evaluation or backward compatibility with AT24C1024-10PI-2.7 - not for surface-mount production |
Compared with M95M01-RDW6TP and 24AA1025-I/P, the AT24C1024-10CI-2.7 uniquely combines I²C compatibility, 8CN3 leadless packaging for high-density layouts, and guaranteed 400 kHz operation at 2.7V - making it optimal for modern compact industrial controllers where bus standardization and board area are critical constraints.
Availability
AT24C1024-10CI-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and smart energy meter firmware requiring stable component supply, long-term obsolescence planning, and traceable sourcing.
Supply support for AT24C1024-10CI-2.7 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 memory solutions, with a focus on reliability, longevity, and industrial-grade performance.
The AT24C1024 belongs to Microchip's legacy serial EEPROM product line, designed specifically for robust, low-power nonvolatile storage in mission-critical embedded systems where data integrity and extended temperature operation are mandatory.
FAQ
What is the operating voltage range of the AT24C1024-10CI-2.7?
The AT24C1024-10CI-2.7 operates from 2.7V to 5.5V DC. This low-voltage range allows direct integration with 3.3V microcontrollers and ensures reliable functionality during brownout conditions common in battery-powered or industrial power-supply environments. Its 400 kHz I²C clock rate is specified at the 2.7V minimum, unlike many competing EEPROMs that require ≥4.5V for full-speed operation.
How does the WP pin function on the AT24C1024-10CI-2.7?
The WP (Write Protect) pin on the AT24C1024-10CI-2.7 provides hardware-level memory locking: when tied to VCC, all write operations (byte, page, or erase) are inhibited; when tied to GND or left floating (internally pulled down), writes are enabled. This dual-mode control enables secure field updates - for example, tying WP to a service-mode GPIO allows temporary write access during maintenance while maintaining default protection during normal operation.
What package type is used for the AT24C1024-10CI-2.7?
The AT24C1024-10CI-2.7 uses the 8-lead Leadless Array Package (LAP), designated 8CN3, measuring 6.0 × 5.0 × 1.04 mm with 1.27 mm pitch. This surface-mount, no-lead package offers superior thermal performance and board-area efficiency compared to SOIC or PDIP variants, making it ideal for compact industrial and medical PCBs where space and automated assembly yield are critical.
Can multiple AT24C1024-10CI-2.7 devices share the same I²C bus?
Yes, up to two AT24C1024-10CI-2.7 devices can share a single I²C bus using the A1 pin for hardware device addressing. When A1 is hardwired high or low, each device responds to a unique 7-bit address; when left floating, both default to the same address and cannot coexist. This cascading capability simplifies multi-parameter storage architectures without requiring bus multiplexers or additional MCU GPIOs.
What is the endurance and data retention specification for the AT24C1024-10CI-2.7?
The AT24C1024-10CI-2.7 guarantees 100,000 write cycles per memory page and 40 years of data retention at +85°C ambient temperature. These specifications are measured per JEDEC standards and validated across the full industrial temperature range (-40°C to +85°C). The 40-year retention ensures calibration data, security keys, or configuration parameters remain intact throughout the expected lifetime of infrastructure-grade equipment.
AT24C1024-10CI-2.7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TDFN
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Mbit
- Memory Organization:
- 128K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 10ms
- Access Time:
- 550 ns
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-LAP (5x6)
AT24C1024-10CI-2.7 FAQ
1.How can I place an order for AT24C1024-10CI-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C1024-10CI-2.7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AT24C1024-10CI-2.7 reliable?
The price and inventory of AT24C1024-10CI-2.7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C1024-10CI-2.7 is usually 5 days.
3.What payment methods are accepted for AT24C1024-10CI-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C1024-10CI-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C1024-10CI-2.7?
AT24C1024-10CI-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C1024-10CI-2.7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AT24C1024-10CI-2.7?
For technical support, including AT24C1024-10CI-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C1024-10CI-2.7 requirements.
6.How does Aetrix verify that AT24C1024-10CI-2.7 is sourced from the original manufacturer or authorized distributors?
All AT24C1024-10CI-2.7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AT24C1024-10CI-2.7 meets industry standards.
7.What is the process for return or replacement of AT24C1024-10CI-2.7?
All AT24C1024-10CI-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C1024-10CI-2.7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AT24C1024-10CI-2.7 part is unused and in its original packaging.
Return procedure for AT24C1024-10CI-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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