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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Microchip Technology AT24C64B-10TU-2.7

Name: AT24C64B-10TU-2.7
Brand: Microchip Technology
SKU: AT24C64B-10TU-2.7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AT24C64B-10TU-2.7

Manufacturer:: Microchip Technology

Category:: Memory

Package:: 8-TSSOP (0.173", 4.40mm Width)

Datasheet:: AT24C64B-10TU-2.7.pdf

Description:: IC EEPROM 64KBIT I2C 8TSSOP

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Product details

Overview

AT24C64B-10TU-2.7 from Microchip Technology is a 64-Kbit I²C-compatible serial EEPROM organized as 8,192 × 8 bits, operating from 2.7V to 5.5V, featuring 400 kHz Fast-mode I²C interface, hardware write-protection for upper 16 Kb quadrant, and industrial temperature range (−40°C to +85°C). It serves as nonvolatile configuration storage in microcontroller-based systems requiring reliable, low-power data retention.

For engineers reviewing the AT24C64B-10TU-2.7 datasheet, AT24C64B-10TU-2.7 pinout, AT24C64B-10TU-2.7 application, or AT24C64B-10TU-2.7 equivalent, key selection criteria include voltage grade compatibility (2.7V–5.5V), page-write capability (32-byte pages), write endurance (1,000,000 cycles), data retention (100 years), and TSSOP-8 package footprint with hardware address inputs (A0–A2) and write-protect (WP) control.

Technical Context

The AT24C64B-10TU-2.7 implements a two-wire I²C slave interface with Schmitt-triggered, noise-filtered SDA and SCL inputs, supporting both Standard-mode (100 kHz) and Fast-mode (400 kHz) operation across its full 2.7V–5.5V supply range. Its internal architecture includes an 8,192-word × 8-bit EEPROM array segmented into 256 pages of 32 bytes each, with dedicated hardware write-protection logic tied to the WP pin state.

Communication follows strict I²C protocol timing: data latched on SCL rising edge, output on falling edge; ACK/NACK responses occur on the ninth clock cycle; and all transitions adhere to defined tSU/tHD/tLOW/tHIGH limits. The device enters Standby mode after Stop condition or power-up reset, drawing ≤6 µA at 4.5–5.5V, and executes self-timed writes completing within 5 ms maximum.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	64 Kbit (8,192 × 8 bits), enabling storage of firmware parameters, calibration data, or user settings in space-constrained designs.
Supply Voltage Range	2.7V to 5.5V - supports direct interfacing with 3.3V and 5V microcontrollers without level-shifting.
I²C Speed Modes	Standard mode (100 kHz) and Fast mode (400 kHz) - allows flexible timing budget allocation in mixed-speed bus environments.
Write Endurance	1,000,000 write cycles - ensures long-term reliability in applications with frequent configuration updates.
Data Retention	100 years at 55°C - guarantees persistent storage integrity over product lifetime under industrial thermal stress.
Standby Current	6 µA maximum at 4.5–5.5V - minimizes system-level quiescent power in battery-backed or energy-sensitive nodes.
Page Write Size	32-byte pages with partial-page write support - reduces bus occupancy and enables efficient burst writes without full-page padding.
Operating Temperature	−40°C to +85°C - qualified for deployment in industrial automation, automotive body electronics, and outdoor equipment.

Pinout & Package

AT24C64B-10TU-2.7 is packaged in an 8-lead TSSOP (Thin Shrink Small Outline Package) with 0.65 mm lead pitch, optimized for high-density PCB layouts and automated assembly. Pin numbering follows standard top-view orientation.

Pin/Terminal	Circuit Role	Design Meaning
A0	Hardware Device Address Input	Configures LSB of 7-bit I²C slave address; tied high/low to enable up to eight devices on same bus without software reconfiguration.
A1	Hardware Device Address Input	Configures middle bit of 7-bit I²C slave address; enables deterministic multi-device addressing in modular systems.
A2	Hardware Device Address Input	Configures MSB of 7-bit I²C slave address; allows scalable topology with shared SDA/SCL lines and no address collision.
GND	Ground Reference	System return path for VCC and signal references; must be low-impedance connection to minimize noise coupling into I²C lines.
SDA	Serial Data Bidirectional I/O	Open-drain line requiring external pull-up resistor (≤10 kΩ); carries command, address, and data bits with ACK/NACK signaling.
SCL	Serial Clock Input	Master-generated clock controlling data sampling; rising edge latches input, falling edge outputs data; requires pull-up for bus idle state.
WP	Write-Protect Control Input	Hardware-enforced lock for upper 16 Kb (0x1800–0x1FFF); tied to VCC disables writes to critical configuration sector.
VCC	Power Supply Input	Primary DC supply (2.7–5.5V); powers internal charge pump for EEPROM programming and logic circuits.

Key Features

Feature	Design Value
Hardware Write Protection	WP pin disables writes to upper 16 Kb quadrant (0x1800–0x1FFF), safeguarding boot configuration or security keys from accidental overwrite.
Noise-Suppressed Inputs	Schmitt-triggered SDA/SCL with integrated filtering rejects >100 ns glitches, ensuring robust operation in electrically noisy industrial environments.
Ultra-Low Standby Power	6 µA max at 5V enables integration into always-on IoT sensors or battery-powered meters without compromising runtime.
Self-Timed Write Cycle	Internal timing circuit completes erase/write within 5 ms max, eliminating need for host polling delay or timeout management.
Green Packaging	RoHS-compliant, halide-free, lead-free TSSOP-8 meets global environmental regulations and simplifies end-of-life compliance reporting.
Flexible Page Writes	32-byte page buffer accepts partial writes (e.g., 1–32 bytes), reducing I²C transaction count and improving throughput versus byte-by-byte writes.

Applications

Industrial PLC Configuration Storage	Smart Meter Calibration Data Retention
Use Scenario: Storing I/O mapping tables, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in factory-floor cabinets. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed via I²C during boot and runtime parameter updates; operates continuously across −40°C to +85°C ambient. Use Value: Hardware WP pin prevents corruption of safety-critical settings during firmware upgrades or brown-out events, ensuring deterministic startup behavior.	Use Scenario: Holding meter-specific calibration coefficients, tariff schedules, and tamper-event logs in ANSI C12.22-compliant electricity meters. IC Role / Device Role / Timing Role: High-reliability data logger with 100-year retention; withstands 1,000,000 write cycles from daily billing updates and fault logging. Use Value: 2.7V–5.5V operation interfaces directly with meter's 3.3V MCU and backup supercapacitor supply, eliminating auxiliary LDOs.
Automotive Body Control Module (BCM)	Medical Infusion Pump Settings Backup
Use Scenario: Saving seat/mirror position presets, lighting profiles, and door-lock configurations in 12V automotive BCMs with wide-input DC/DC converters. IC Role / Device Role / Timing Role: I²C slave storing user preferences; powered from regulated 5V rail; survives load-dump transients via internal ESD protection (>2.5 kV). Use Value: TSSOP-8 footprint fits tight BCM board space; industrial temp rating covers under-hood thermal cycling without derating.	Use Scenario: Preserving drug library definitions, dose limits, and clinician audit trails in Class II medical infusion pumps requiring FDA 21 CFR Part 11 compliance. IC Role / Device Role / Timing Role: Secure configuration store with write-protection for regulatory-critical parameters; accessed only during setup or maintenance mode. Use Value: 100-year data retention satisfies long-service-life requirements for hospital-grade devices; RoHS/halide-free packaging aligns with medical material restrictions.

Industrial PLC Configuration Storage

Smart Meter Calibration Data Retention

Use Scenario: Storing I/O mapping tables, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in factory-floor cabinets.

IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed via I²C during boot and runtime parameter updates; operates continuously across −40°C to +85°C ambient.

Use Value: Hardware WP pin prevents corruption of safety-critical settings during firmware upgrades or brown-out events, ensuring deterministic startup behavior.

Use Scenario: Holding meter-specific calibration coefficients, tariff schedules, and tamper-event logs in ANSI C12.22-compliant electricity meters.

IC Role / Device Role / Timing Role: High-reliability data logger with 100-year retention; withstands 1,000,000 write cycles from daily billing updates and fault logging.

Use Value: 2.7V–5.5V operation interfaces directly with meter's 3.3V MCU and backup supercapacitor supply, eliminating auxiliary LDOs.

Automotive Body Control Module (BCM)

Medical Infusion Pump Settings Backup

Use Scenario: Saving seat/mirror position presets, lighting profiles, and door-lock configurations in 12V automotive BCMs with wide-input DC/DC converters.

IC Role / Device Role / Timing Role: I²C slave storing user preferences; powered from regulated 5V rail; survives load-dump transients via internal ESD protection (>2.5 kV).

Use Value: TSSOP-8 footprint fits tight BCM board space; industrial temp rating covers under-hood thermal cycling without derating.

Use Scenario: Preserving drug library definitions, dose limits, and clinician audit trails in Class II medical infusion pumps requiring FDA 21 CFR Part 11 compliance.

IC Role / Device Role / Timing Role: Secure configuration store with write-protection for regulatory-critical parameters; accessed only during setup or maintenance mode.

Use Value: 100-year data retention satisfies long-service-life requirements for hospital-grade devices; RoHS/halide-free packaging aligns with medical material restrictions.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AT24C64D-SSHM-T	Same 64-Kbit capacity and 2.7–5.5V range, but uses SOIC-8 package and supports 1 MHz Ultra Fast-mode I²C.	Larger SOIC footprint; higher speed useful only if host MCU supports >400 kHz and bus capacitance permits.	Select when board layout accommodates SOIC and system demands faster configuration loading.
M24C64-WMN6TP	64-Kbit EEPROM with identical 2.7–5.5V range and TSSOP-8 package, but rated for −40°C to +105°C and offers 400 kHz I²C only.	Extended high-temp rating suits under-hood automotive use; no WP pin - protection relies on software locking.	Choose for extended temperature applications where hardware write protection is not required.

Compared with AT24C64B-10TU-2.7, the AT24C64D-SSHM-T offers higher I²C speed in SOIC packaging, while the M24C64-WMN6TP provides wider temperature tolerance in the same TSSOP-8 footprint but lacks hardware write protection - making AT24C64B-10TU-2.7 optimal for cost-sensitive industrial designs needing quadrant-level data security.

Availability

AT24C64B-10TU-2.7 is available at Aetrix Electronics and suitable for industrial PLCs, smart utility meters, automotive body control modules, and medical infusion pumps requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.

Supply support for AT24C64B-10TU-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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with ISO 9001-certified manufacturing and global distribution.

The AT24C64B-10TU-2.7 belongs to Microchip's AT24Cxx family of I²C serial EEPROMs, designed specifically for low-voltage, high-reliability nonvolatile storage in resource-constrained embedded systems across industrial, automotive, and medical markets.

FAQ

What is the supply voltage range supported by the AT24C64B-10TU-2.7?

The AT24C64B-10TU-2.7 operates from 2.7V to 5.5V, making it compatible with both 3.3V and 5V microcontroller systems without level translation. This 2.7V minimum threshold defines it as a "standard voltage grade" device, distinct from the 1.8V–5.5V low-voltage variants in the same family. Operation outside this range may cause functional failure or data corruption.

Does the AT24C64B-10TU-2.7 support hardware write protection, and how is it implemented?

Yes, the AT24C64B-10TU-2.7 implements hardware write protection via the WP pin: when driven to VCC, it inhibits all write operations to the upper 16 Kb quadrant (addresses 0x1800–0x1FFF), leaving lower memory fully writable. This feature is independent of software commands and remains active even during power transitions, providing deterministic protection for critical configuration data stored in AT24C64B-10TU-2.7.

What package type is used for the AT24C64B-10TU-2.7, and what are its key mechanical attributes?

The AT24C64B-10TU-2.7 uses an 8-lead TSSOP (Thin Shrink Small Outline Package) with 0.65 mm lead pitch and JEDEC-standard dimensions (4.4 mm × 3.0 mm body size). This package enables high-density PCB layouts, supports automated pick-and-place assembly, and provides thermal performance suitable for industrial ambient conditions - distinguishing it from the SOIC-8 variant of the same device.

How many devices can share the same I²C bus with the AT24C64B-10TU-2.7, and what determines uniqueness?

Up to eight AT24C64B-10TU-2.7 devices can coexist on a single I²C bus, enabled by three hardware address pins (A0, A1, A2). Each pin's logic state (high/low) sets one bit of the 3-bit hardware address portion of the 7-bit I²C slave address (base 0xA0). Since AT24C64B-10TU-2.7 uses the fixed device type identifier '1010', unique addressing is achieved solely through A0–A2 configuration - no software address assignment is needed.

What is the maximum write cycle time for the AT24C64B-10TU-2.7, and how does it affect system design?

The AT24C64B-10TU-2.7 has a maximum write cycle time of 5 ms, which is internally self-timed and does not require host polling. During this period, the device does not acknowledge I²C commands, so the host must either wait 5 ms or implement acknowledge polling (repeated START + device address until ACK received). This timing constraint directly impacts firmware latency for configuration updates and must be accounted for in real-time system response budgets involving AT24C64B-10TU-2.7.

AT24C64B-10TU-2.7 Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 8-TSSOP (0.173", 4.40mm Width)

Packaging:: Tube

Product Status:: Active

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-TSSOP

AT24C64B-10TU-2.7 FAQ

1.How can I place an order for AT24C64B-10TU-2.7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AT24C64B-10TU-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 AT24C64B-10TU-2.7 reliable?

The price and inventory of AT24C64B-10TU-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 AT24C64B-10TU-2.7 is usually 5 days.

3.What payment methods are accepted for AT24C64B-10TU-2.7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C64B-10TU-2.7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AT24C64B-10TU-2.7?

AT24C64B-10TU-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AT24C64B-10TU-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 AT24C64B-10TU-2.7?

For technical support, including AT24C64B-10TU-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C64B-10TU-2.7 requirements.

6.How does Aetrix verify that AT24C64B-10TU-2.7 is sourced from the original manufacturer or authorized distributors?

All AT24C64B-10TU-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 AT24C64B-10TU-2.7 meets industry standards.

7.What is the process for return or replacement of AT24C64B-10TU-2.7?

All AT24C64B-10TU-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C64B-10TU-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 AT24C64B-10TU-2.7 part is unused and in its original packaging.

Return procedure for AT24C64B-10TU-2.7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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