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Microchip Technology AT24C64AN-10SU-2.7-T
- Part No.:
- AT24C64AN-10SU-2.7-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C64AN-10SU-2.7-T.pdf
- Description:
- IC EEPROM 64KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT24C64AN-10SU-2.7-T from Microchip Technology (formerly Atmel) is a 64 Kbit (8192 × 8) two-wire serial EEPROM with I²C-compatible interface, 2.7V to 5.5V supply range, hardware write protection via WP pin, and 32-byte page write capability. It delivers 1 million write cycles, 100-year data retention, and operates across –40°C to +85°C for industrial embedded systems requiring nonvolatile parameter storage.
For engineers reviewing the AT24C64AN-10SU-2.7-T datasheet, AT24C64AN-10SU-2.7-T pinout, AT24C64AN-10SU-2.7-T application, or AT24C64AN-10SU-2.7-T equivalent, key selection factors include its 400 kHz I²C speed at 2.7V, 6 µA standby current, JEDEC SOIC-8 package, Schmitt-trigger inputs for noise immunity, and support for up to eight devices on a shared bus via A0–A2 addressing.
Technical Context
The AT24C64AN-10SU-2.7-T implements a standard two-wire (I²C) serial interface with open-drain SDA and active-high SCL, supporting bidirectional data transfer and 7-bit device addressing plus R/W bit. Its internal architecture organizes memory as 256 pages of 32 bytes each, enabling partial-page writes and automatic address incrementing within a page.
It features hardware-based write protection via the WP pin, Schmitt-triggered SDA/SCL inputs with 50 ns noise suppression, and self-timed 5 ms max write cycles. The device uses internal pull-down biasing on A0–A2 and WP pins when floating, with design guidance recommending hardwiring for robustness in >3 pF coupling environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64 Kbit (8192 × 8), organized as 256 pages × 32 bytes - enables efficient parameter logging and configuration storage without external address latches. |
| Supply Voltage Range | 2.7V to 5.5V - supports direct interfacing with 3.3V and 5V microcontrollers without level-shifting. |
| I²C Clock Frequency | Up to 400 kHz - compatible with standard-mode I²C controllers and sufficient for firmware update metadata or sensor calibration storage. |
| Standby Current | 6 µA at 5.5V - minimizes quiescent power in battery-backed or energy-sensitive industrial nodes. |
| Write Endurance | 1 million cycles - ensures reliable operation over 10+ years in applications with daily configuration updates. |
| Data Retention | 100 years at 25°C - guarantees long-term integrity of factory-trimmed coefficients and security keys. |
| Operating Temperature | –40°C to +85°C - qualified for industrial control panels, HVAC systems, and metering equipment. |
| Page Write Size | 32 bytes per write cycle - reduces transaction overhead versus byte-write mode and aligns with typical MCU buffer sizes. |
Pinout & Package
AT24C64AN-10SU-2.7-T is housed in an 8-lead JEDEC SOIC (8S1) package, 0.150" wide body, RoHS-compliant and lead-free ("U" suffix), with gull-wing leads and 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hardwired low/high to set LSB of 7-bit I²C slave address; enables up to 8 devices on same bus. |
| A1 | Device Address Input | Hardwired low/high to set middle bit of slave address; used with A0 and A2 for unique device addressing. |
| A2 | Device Address Input | Hardwired low/high to set MSB of slave address; required for multi-device I²C topology. |
| GND | Ground Reference | System ground return path for VCC, SDA, SCL, and WP; must be low-impedance for noise immunity. |
| VCC | Power Supply | 2.7V–5.5V main supply; decoupling capacitor (0.1 µF) recommended near pin for stable I²C timing. |
| WP | Write Protect Control | Active-high hardware lock: tied to VCC disables all writes; tied to GND enables full read/write access. |
| SCL | Serial Clock Input | Positive-edge sampled clock input; requires external pull-up; defines I²C timing and synchronization. |
| SDA | Serial Data I/O | Bidirectional open-drain data line; requires external pull-up; supports wire-OR with other I²C devices. |
Key Features
| Feature | Design Value |
|---|---|
| Two-wire Serial Interface | Reduces PCB routing complexity and MCU pin count versus SPI; compatible with legacy and modern I²C controllers. |
| Schmitt Trigger Inputs | Enables reliable operation in electrically noisy industrial environments by rejecting sub-50 ns transients on SDA/SCL lines. |
| 32-byte Page Write Mode | Improves write throughput by 32× vs. byte-write; allows atomic update of related parameters (e.g., calibration triplets). |
| Hardware Write Protection | Prevents accidental or malicious firmware corruption during power-up/down or brown-out events using dedicated WP pin. |
| Low-Voltage Operation | Supports 2.7V minimum VCC - interoperable with 3.3V logic families and tolerant of supply droop in unregulated systems. |
| High Reliability | 1M write cycles and 100-year retention validated per JEDEC standards - suitable for mission-critical configuration storage. |
Applications
| Industrial Sensor Calibration | Smart Meter Firmware Metadata |
|---|---|
Use Scenario: Storing temperature-compensated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed at system boot and during field recalibration via I²C. Use Value: Enables factory-trimmed accuracy without external trim pots; retains calibration across 10+ year product lifetime. | Use Scenario: Holding firmware version, update timestamp, and cryptographic signature hash in electricity/water meters. IC Role / Device Role / Timing Role: Secure metadata store updated only during authenticated OTA upgrades; WP pin locked during normal operation. Use Value: Prevents rollback attacks and ensures firmware integrity verification without MCU-side flash wear management. |
| Medical Device Configuration | Automotive Body Control Module |
Use Scenario: Saving user-selectable therapy parameters (e.g., infusion rate limits, alarm thresholds) in portable infusion pumps. IC Role / Device Role / Timing Role: Patient-specific settings storage with guaranteed retention during battery replacement or power loss. Use Value: Meets IEC 62304 Class B software requirements for persistent data integrity and traceability. | Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in automotive door modules. IC Role / Device Role / Timing Role: Low-power configuration memory accessed infrequently via LIN-to-I²C bridge or direct MCU I²C port. Use Value: Supports 15+ year vehicle service life with zero maintenance; 6 µA ISB enables always-on retention in sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M24C64-WMN6TP | Same 64 Kbit size, 2.5–5.5V VCC range, but rated for –40°C to +105°C; 1 MHz I²C support; different SOIC-8 footprint (8S2, not 8S1). | Preferred for extended-temperature automotive cabin modules where ambient exceeds +85°C. | Select M24C64-WMN6TP if operating above +85°C or requiring faster 1 MHz I²C burst writes. |
| CAT24C64YI-GT3 | Identical 64 Kbit, 2.7–5.5V, –40°C to +85°C spec; same 8S1 SOIC package; 400 kHz I²C; but lower 3 µA ISB at 5.5V and no WP pin - write protection handled in firmware. | Suitable for cost-sensitive consumer IoT hubs where hardware write lock is unnecessary and ultra-low standby is critical. | Choose CAT24C64YI-GT3 when minimizing standby power is prioritized over hardware-level write security. |
Compared with M24C64-WMN6TP and CAT24C64YI-GT3, the AT24C64AN-10SU-2.7-T provides verified hardware write protection and JEDEC SOIC-8 (8S1) compatibility out-of-box, making it optimal for industrial designs requiring deterministic data safety and drop-in board layout reuse.
Availability
AT24C64AN-10SU-2.7-T is available at Aetrix Electronics and suitable for industrial automation, smart metering, and medical device manufacturing requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for AT24C64AN-10SU-2.7-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 global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with broad industrial and automotive qualification programs.
The AT24C64AN-10SU-2.7-T belongs to Microchip's legacy AT24Cxx serial EEPROM family, designed specifically for low-power, space-constrained embedded systems needing reliable, byte-addressable nonvolatile storage with minimal MCU resource usage.
FAQ
What is the maximum I²C clock frequency supported by the AT24C64AN-10SU-2.7-T?
The AT24C64AN-10SU-2.7-T supports a maximum I²C clock frequency of 400 kHz across its full 2.7V to 5.5V supply range and –40°C to +85°C temperature range. This is specified in Table 4 of the datasheet under fSCL, and applies to both read and write operations. It does not support fast-mode plus (1 MHz) or high-speed mode.
Does the AT24C64AN-10SU-2.7-T require external pull-up resistors on SDA and SCL lines?
Yes, the AT24C64AN-10SU-2.7-T requires external pull-up resistors on both SDA and SCL lines because its SDA pin is open-drain and SCL is a CMOS input. Typical values range from 1.8 kΩ (for 400 kHz, 3.3V) to 10 kΩ (for slower speeds or higher VCC); exact values depend on bus capacitance and rise-time requirements per I²C specification.
How many devices can share the same I²C bus with the AT24C64AN-10SU-2.7-T?
Up to eight AT24C64AN-10SU-2.7-T devices can share a single I²C bus, enabled by the three hardware address pins A0, A1, and A2. Each pin can be hardwired to VCC or GND, yielding 2³ = 8 unique 7-bit slave addresses (0x50–0x57). Floating address pins default to logic low via internal biasing, but hardwiring is recommended for deterministic operation.
What is the function of the WP pin on the AT24C64AN-10SU-2.7-T?
The WP (Write Protect) pin on the AT24C64AN-10SU-2.7-T is a hardware enable/disable control for all write operations. When WP is tied to VCC, writes to memory are inhibited; when tied to GND, full read/write access is granted. If left floating, internal pull-down biasing defaults it to GND - but Microchip recommends explicit GND connection for reliability in noisy environments.
Is the AT24C64AN-10SU-2.7-T suitable for automotive applications?
No - the AT24C64AN-10SU-2.7-T is specified for industrial temperature range (–40°C to +85°C) and is not AEC-Q100 qualified. While it may function in some automotive cabin environments, Microchip explicitly states in the datasheet disclaimer that "Atmel's products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life," including automotive safety systems. For automotive use, consider AEC-Q100 qualified alternatives like the M24C64-WMN6TP.
AT24C64AN-10SU-2.7-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 64Kbit
- Memory Organization:
- 8K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C64AN-10SU-2.7-T FAQ
1.How can I place an order for AT24C64AN-10SU-2.7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C64AN-10SU-2.7-T 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 AT24C64AN-10SU-2.7-T reliable?
The price and inventory of AT24C64AN-10SU-2.7-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C64AN-10SU-2.7-T is usually 5 days.
3.What payment methods are accepted for AT24C64AN-10SU-2.7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C64AN-10SU-2.7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C64AN-10SU-2.7-T?
AT24C64AN-10SU-2.7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C64AN-10SU-2.7-T 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 AT24C64AN-10SU-2.7-T?
For technical support, including AT24C64AN-10SU-2.7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C64AN-10SU-2.7-T requirements.
6.How does Aetrix verify that AT24C64AN-10SU-2.7-T is sourced from the original manufacturer or authorized distributors?
All AT24C64AN-10SU-2.7-T 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 AT24C64AN-10SU-2.7-T meets industry standards.
7.What is the process for return or replacement of AT24C64AN-10SU-2.7-T?
All AT24C64AN-10SU-2.7-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C64AN-10SU-2.7-T, 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 AT24C64AN-10SU-2.7-T part is unused and in its original packaging.
Return procedure for AT24C64AN-10SU-2.7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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