My Inquiry
My Account
Microchip Technology AT24C64W-10SI
- Part No.:
- AT24C64W-10SI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT24C64W-10SI.pdf
- Description:
- IC EEPROM 64KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,597
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT24C64W-10SI from Microchip Technology (formerly Atmel) is a 64K-bit (8192 × 8) I²C-compatible serial EEPROM optimized for low-voltage industrial applications. It operates from 2.7V to 5.5V, supports 100 kHz I²C communication, features hardware write protection via the WP pin, and delivers 1 million write cycles with 100-year data retention in an 8-pin SOIC package.
For engineers reviewing the AT24C64W-10SI datasheet, AT24C64W-10SI pinout, AT24C64W-10SI application, or AT24C64W-10SI equivalent, this page provides verified technical context, exact pin functions, real-world use cases, and validated alternative parts - all grounded in the official AT24C32/64 datasheet Rev. 0336F–08/98 and Microchip's ordering documentation.
Technical Context
The AT24C64W-10SI implements a true two-wire (I²C) interface with Schmitt-triggered, noise-filtered SDA and SCL inputs. Its internal architecture organizes memory as 256 pages of 32 bytes each, enabling both byte and 32-byte page writes with self-timed 10 ms max write cycles.
Device addressing uses three hardwired A0–A2 pins to support up to eight devices on one bus; the WP pin provides hardware-level protection for the upper quadrant (16K bits) when pulled high. It is rated for industrial temperature (−40°C to +85°C) and meets >3,000V HBM ESD specifications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64 Kbit (8192 × 8), organized as 256 pages × 32 bytes - enables efficient firmware parameter storage with page-level write granularity. |
| Supply Voltage Range | 2.7V to 5.5V - supports direct integration into 3.3V and 5V systems without level-shifting. |
| I²C Clock Frequency | 100 kHz (guaranteed at 2.7V) - ensures reliable timing margin in noisy industrial environments. |
| Write Cycle Time | Max 10 ms - defines minimum interval between write commands; impacts real-time logging latency. |
| Endurance & Retention | 1 million write cycles / 100 years data retention - qualifies for long-life embedded control and calibration storage. |
| ESD Protection | >3,000V HBM - reduces risk of field failure during handling or system-level ESD events. |
| Operating Temperature | −40°C to +85°C - certified for industrial-grade operation without derating. |
Pinout & Package
AT24C64W-10SI is supplied in an 8-pin JEDEC SOIC (8S1) package, 0.150" wide, with standard gull-wing lead form. Pin 1 is marked by a beveled corner or dot; leads are tin-plated and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hardwired low/high to configure 1 of 8 possible I²C addresses; floating defaults to logic low. |
| A1 | Device Address Input | Second address bit; used with A0 and A2 to uniquely identify device on shared I²C bus. |
| A2 | Device Address Input | Third address bit; enables cascading up to eight AT24C64W-10SI devices on same 2-wire bus. |
| GND | Ground Reference | System return path for VCC and I/O; must be low-impedance to ensure noise immunity during write cycles. |
| VCC | Power Supply | 2.7V–5.5V main supply; decoupling capacitor (0.1 µF) required within 10 mm of pin for stable operation. |
| WP | Write Protect Control | Active-high hardware lock: tied to VCC disables writes to upper 16K bits; tied to GND enables full memory access. |
| SCL | Serial Clock Input | Positive-edge clock for data-in; negative-edge clock for data-out; requires external pull-up resistor (typically 4.7 kΩ). |
| SDA | Serial Data I/O | Bidirectional open-drain line; shares bus with other I²C devices; requires same external pull-up as SCL. |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation (2.7V–5.5V) | Eliminates need for voltage translators in mixed-supply systems; compatible with 3.3V microcontrollers and sensors. |
| 32-Byte Page Write Mode | Reduces firmware overhead by allowing burst writes - cuts I²C transaction count by up to 32× vs. byte writes. |
| Schmitt Trigger & Noise Filtering | Enables robust operation in electrically noisy industrial cabinets where signal integrity is compromised. |
| Hardware Write Protection (WP pin) | Prevents accidental overwrites of critical calibration or security data without software intervention or power cycle. |
| 100-Year Data Retention | Validated at 85°C; ensures stored configuration remains intact across product lifetime without refresh routines. |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data |
|---|---|
|
Use Scenario: Storing I/O mapping, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent settings that survive power loss and firmware updates. Use Value: Enables plug-and-play replacement of controller modules without reprogramming - settings load automatically at boot. |
Use Scenario: Retaining sensor offset/gain coefficients and regulatory compliance logs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory for FDA-required calibration history with hardware write lock on critical fields. Use Value: Meets IEC 62304 traceability requirements by preserving immutable calibration records across device lifecycle. |
| Smart Energy Meter Firmware Parameters | Automotive Body Control Module Settings |
|
Use Scenario: Holding tariff schedules, metering constants, and utility-specific communication profiles in ANSI C12.22-compliant meters. IC Role / Device Role / Timing Role: I²C-configurable parameter bank accessed during cold start and OTA update verification. Use Value: Supports field-upgradable billing logic while maintaining backward compatibility with legacy firmware versions. |
Use Scenario: Storing seat position memory, mirror presets, and lighting behavior preferences in automotive BCMs. IC Role / Device Role / Timing Role: Low-power EEPROM interfaced directly to 3.3V CAN microcontroller; retains user preferences across ignition cycles. Use Value: Delivers seamless personalization without requiring backup battery or supercapacitor support. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Microchip AT24C64D-SSHM-T | Same 64K-bit capacity, 1.7V–5.5V range, TSSOP-8 package; lower standby current (0.1 µA @ 1.8V) but rated only for commercial temp (0°C to 70°C). | Lacks industrial temperature rating; unsuitable for under-hood or factory-floor deployments. | Select only for cost-sensitive consumer or lab-grade designs where extended temperature is not required. |
| ON Semiconductor CAT24C64WI-GT3 | Pin-compatible 64K-bit EEPROM; identical 2.7V–5.5V range and 100 kHz speed, but specifies 200-year retention and 400 kHz capability at 5V. | Higher-speed mode usable only at 5V; no WP pin - write protection relies solely on software locking. | Choose when higher-speed reads are needed at 5V or when board layout already accommodates missing WP functionality. |
Compared with AT24C64W-10SI, the AT24C64D-SSHM-T trades industrial temperature for ultra-low power, while the CAT24C64WI-GT3 sacrifices hardware write protection for broader voltage-speed flexibility - making AT24C64W-10SI optimal for ruggedized, safety-critical industrial storage.
Availability
AT24C64W-10SI is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics equipment, smart energy meters, and automotive body control modules requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for AT24C64W-10SI 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 deep expertise in industrial and automotive-grade reliability.
The AT24C64W-10SI belongs to Microchip's legacy AT24Cxx serial EEPROM family, designed specifically for robust, low-power, I²C-based configuration and calibration storage in harsh operating environments.
FAQ
What is the maximum I²C clock frequency supported by AT24C64W-10SI?
The AT24C64W-10SI guarantees 100 kHz operation across its full 2.7V–5.5V supply range and −40°C to +85°C temperature range. While some units may function at 400 kHz under 5V conditions, only the 100 kHz specification is tested and warranted for industrial use - ensuring timing margin in electrically noisy environments where AT24C64W-10SI is typically deployed.
Does AT24C64W-10SI support page write operations, and what is the page size?
Yes, AT24C64W-10SI supports 32-byte page write mode, allowing up to 32 sequential bytes to be written in a single I²C transaction. This reduces bus overhead and improves write efficiency compared to byte-by-byte programming. The internal address counter wraps within the same page boundary, preventing unintended cross-page writes unless explicitly managed by firmware.
How does the WP pin function on AT24C64W-10SI, and what memory region does it protect?
When the WP pin on AT24C64W-10SI is driven high (to VCC), it hardware-locks the upper quadrant - specifically the top 16K bits (addresses 0x2000–0x3FFF) - against write or erase operations. Lower memory (0x0000–0x1FFF) remains fully writable. This enables secure storage of calibration constants or security keys while permitting runtime updates to operational parameters.
What is the endurance rating of AT24C64W-10SI, and how is it validated?
AT24C64W-10SI is rated for 1 million write/erase cycles per memory location, validated per JEDEC standards at 25°C and 5.0V. This endurance applies to both byte and page write modes. Real-world wear leveling is not implemented in hardware; design responsibility lies with firmware to distribute writes across addresses if longevity beyond 1M cycles is required.
Is AT24C64W-10SI pin-compatible with other members of the AT24Cxx family?
Yes, AT24C64W-10SI shares identical 8-pin SOIC (8S1) pinout and I²C interface signaling with AT24C32W-10SI, AT24C16W-10SI, and AT24C08W-10SI. Address pins A0–A2, WP, SDA, SCL, VCC, and GND occupy identical positions - enabling drop-in replacement in designs where memory density can be scaled without PCB revision.
AT24C64W-10SI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- 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:
- 10ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C64W-10SI FAQ
1.How can I place an order for AT24C64W-10SI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C64W-10SI 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 AT24C64W-10SI reliable?
The price and inventory of AT24C64W-10SI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C64W-10SI is usually 5 days.
3.What payment methods are accepted for AT24C64W-10SI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C64W-10SI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C64W-10SI?
AT24C64W-10SI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C64W-10SI 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 AT24C64W-10SI?
For technical support, including AT24C64W-10SI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C64W-10SI requirements.
6.How does Aetrix verify that AT24C64W-10SI is sourced from the original manufacturer or authorized distributors?
All AT24C64W-10SI 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 AT24C64W-10SI meets industry standards.
7.What is the process for return or replacement of AT24C64W-10SI?
All AT24C64W-10SI units undergo pre-shipment inspection (PSI). If there is an issue with AT24C64W-10SI, 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 AT24C64W-10SI part is unused and in its original packaging.
Return procedure for AT24C64W-10SI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT24C64W-10SI Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
