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Microchip Technology AT93C57W-10SC-2.5
- Part No.:
- AT93C57W-10SC-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C57W-10SC-2.5.pdf
- Description:
- IC EEPROM 2KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,467
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Product details
Overview
AT93C57W-10SC-2.5 from Microchip Technology (formerly Atmel) is a 2K-bit 3-wire serial EEPROM with user-selectable 256 × 8 or 128 × 16 organization, 2.5V–5.5V supply range, 10 ms max self-timed write cycle, and 1 million write endurance. It serves as nonvolatile configuration storage in embedded controllers, power management units, and sensor calibration modules.
For engineers reviewing the AT93C57W-10SC-2.5 datasheet, AT93C57W-10SC-2.5 pinout, AT93C57W-10SC-2.5 application, or AT93C57W-10SC-2.5 equivalent, key selection criteria include low-voltage operation down to 2.5V, SOIC-8 (EIAJ) package compatibility, 2 MHz clock support at 5V, ORG-pin configurable memory width, and automotive-grade temperature range availability.
Technical Context
The AT93C57W-10SC-2.5 implements a synchronous 3-wire serial interface (CS/SK/DI/DO) with start-bit–driven instruction decoding and ORG-pin–controlled internal word width. It supports seven instructions including READ, WRITE, ERASE, EWEN, EWDS, ERAL, and WRAL - all initiated by CS assertion and validated via rising-edge–synchronized SK clocking.
Write operations require prior EWEN enable and are self-timed up to 10 ms; DO pin provides READY/BUSY status when CS is raised during programming. The device uses internal pull-up on ORG (≈1 MΩ) to default to x16 mode if unconnected, and excludes this feature only in 1.8V variants - confirmed not applicable to AT93C57W-10SC-2.5.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8 or 128 × 16 organization) |
| Supply Voltage Range | 2.5V to 5.5V - enables direct interfacing with 2.5V/3.3V microcontrollers without level shifting |
| Max Clock Frequency | 2 MHz at VCC = 5V - supports high-speed configuration reads in time-critical boot sequences |
| Write Cycle Time | ≤10 ms - guarantees deterministic firmware update latency for system-level configuration writes |
| Endurance & Retention | 1 million write cycles / 100 years data retention - suitable for field-updatable calibration tables and runtime parameter logging |
| Operating Temperature | −40°C to +85°C (Industrial grade) - validated for deployment in automotive body control modules and industrial PLC I/O expanders |
| ESD Protection | >4000V HBM - ensures robustness during board handling and in-circuit programming |
Pinout & Package
AT93C57W-10SC-2.5 is housed in an 8-lead EIAJ SOIC (8S2) package - 0.200" wide, gull-wing leads, JEDEC-compliant footprint with 1.27 mm pitch. Pin 1 marked by beveled corner or notch; lead finish is matte tin.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable: must be held low for entire instruction sequence; raising CS during write returns READY/BUSY status on DO |
| SK | Serial Clock | Input-only edge-triggered clock; rising edge samples DI, shifts DO; min/max timing defined per VCC range |
| DI | Data Input | Serial instruction/address/data input; accepts 7-bit address + 8/16-bit data depending on ORG state |
| DO | Data Output | Open-drain output with internal pull-up; delivers read data, status (READY=1/BUSY=0), or high-Z when CS high |
| GND | Ground Reference | Return path for VCC and all I/O; requires low-impedance connection to minimize noise coupling into serial interface |
| VCC | Power Supply | 2.5V–5.5V supply; bypass capacitor (0.1 µF ceramic) required within 10 mm of pin for stable read/write margins |
| ORG | Organization Select | Logic-high = 128 × 16 mode; logic-low = 256 × 8 mode; unconnected defaults to x16 via internal ~1 MΩ pull-up |
| DC | No Connect | Internally unused; must remain floating - no external connection permitted |
Key Features
| Feature | Design Value |
|---|---|
| User-selectable memory organization | Hardware-configurable 256×8 or 128×16 layout via ORG pin - eliminates software rework when migrating between byte- and word-oriented host firmware |
| Self-timed write cycle | No external timing control needed; DO pin signals completion status - simplifies host MCU firmware and removes need for fixed delay loops |
| Multi-voltage operation | Single part supports 2.5V, 2.7V, and 5V systems - reduces BOM count across product variants with differing supply rails |
| Instruction-set–based security | EWEN/EWDS gating prevents accidental writes; ERAL/WRAL restricted to 4.5–5.5V - enforces safe bulk operations only during controlled power conditions |
| Industrial temperature rating | −40°C to +85°C operation - qualified for under-hood automotive modules and factory-floor industrial sensors without derating |
Applications
| Printer Firmware Storage | Motor Drive Calibration |
|---|---|
Use Scenario: Storing printer model-specific font sets, paper-handling parameters, and maintenance counters across power cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration register bank accessed during boot and service mode via SPI-compatible 3-wire interface. Use Value: Enables field-upgradable firmware assets without requiring external flash controller or additional voltage translation circuitry. |
Use Scenario: Holding motor winding resistance compensation values, encoder offset corrections, and thermal derating curves in BLDC drives. IC Role / Device Role / Timing Role: Persistent parameter store written once during factory calibration and read at startup to initialize closed-loop control coefficients. Use Value: Maintains precision motor performance across 100k+ operational hours with guaranteed 1M write cycles and 100-year data retention. |
| Smart Energy Meter Security Keys | Medical Sensor Offset Trimming |
Use Scenario: Securing AES encryption keys and tamper-event logs in utility-grade electricity meters operating in harsh outdoor environments. IC Role / Device Role / Timing Role: Tamper-resistant key vault with hardware-gated write enable (EWEN/EWDS) and ESD-hardened I/O pins. Use Value: Meets IEC 62055-41 security requirements via >4 kV HBM ESD rating and voltage-restricted bulk-write instructions (ERAL/WRAL). |
Use Scenario: Storing factory-trimmed gain/offset coefficients for analog front-end circuits in portable ECG and pulse oximeter devices. IC Role / Device Role / Timing Role: Low-power, low-voltage (2.5V) nonvolatile memory interfaced directly to 3.3V/2.5V SAR ADC controllers. Use Value: Eliminates external level shifters and supports battery-powered operation down to 2.5V supply while maintaining ±0.1% calibration accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95256-WMN6TP | 256 Kbit SPI interface, 1.8–5.5V, 20 MHz clock, 5 ms write time | Higher density, faster interface, but requires SPI protocol stack vs. simpler 3-wire command set | Select when migrating to higher-capacity storage or existing SPI infrastructure; not drop-in due to different instruction set and pinout |
| STK12C68-55I | 8K-bit NVSRAM, 5V-only, parallel interface, 15 ns access, unlimited endurance | Combines SRAM speed with EEPROM nonvolatility; requires external backup capacitor and 5V rail | Choose for real-time data logging with instant write commit; unsuitable for 2.5V systems or space-constrained SOIC layouts |
Compared with M95256-WMN6TP and STK12C68-55I, AT93C57W-10SC-2.5 offers optimal balance of low-voltage operation, minimal pin count, deterministic 10 ms write latency, and proven reliability in cost-sensitive industrial control nodes - making it preferred where simplicity, voltage flexibility, and long-term stability outweigh raw speed or density.
Availability
AT93C57W-10SC-2.5 is available at Aetrix Electronics and suitable for industrial automation controllers, automotive body electronics, medical sensor modules, and smart metering systems requiring stable component supply across extended product lifecycles.
Supply support for AT93C57W-10SC-2.5 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 acquired Atmel in 2016 and maintains full technical and manufacturing continuity for the AT93C family of serial EEPROMs.
The AT93C57W-10SC-2.5 belongs to Microchip's legacy serial EEPROM product line, engineered for ultra-reliable, low-pin-count nonvolatile storage in resource-constrained embedded systems with stringent voltage and temperature requirements.
FAQ
What is the memory organization of AT93C57W-10SC-2.5?
The AT93C57W-10SC-2.5 provides 2048 bits organized as either 256 words × 8 bits or 128 words × 16 bits, selected by the logic level on the ORG pin. When ORG is tied to VCC, x16 mode is active; when grounded, x8 mode is selected. An unconnected ORG defaults to x16 via internal pull-up - a behavior confirmed for the 2.5V variant.
Does AT93C57W-10SC-2.5 support 1.8V operation?
No, AT93C57W-10SC-2.5 is rated for 2.5V to 5.5V operation only. The 1.8V version is designated separately (e.g., AT93C57W-10SC-1.8) and includes modified internal circuitry - the ORG pin pull-up is disabled in 1.8V variants, but AT93C57W-10SC-2.5 retains full ORG functionality per its datasheet.
What package type does AT93C57W-10SC-2.5 use?
AT93C57W-10SC-2.5 uses an 8-lead EIAJ SOIC package (8S2), measuring 0.200" wide with gull-wing leads and 1.27 mm pitch. This differs from the JEDEC SOIC (8S1) variant - the "W" suffix in the part number explicitly denotes EIAJ SOIC packaging per Atmel's ordering guide.
Can AT93C57W-10SC-2.5 be used in automotive applications?
Yes - AT93C57W-10SC-2.5 is qualified for industrial temperature range (−40°C to +85°C), and automotive-grade versions (e.g., AT93C57W-10SC-2.5A) exist with extended testing. Its 1 million write endurance, 100-year data retention, and >4 kV HBM ESD rating meet core requirements for body control modules and infotainment configuration storage.
How does the write-enable sequence work on AT93C57W-10SC-2.5?
Before any WRITE or ERASE command, AT93C57W-10SC-2.5 must receive an EWEN (Erase/Write Enable) instruction. This transitions the device from default EWDS (disable) state to programming-enabled mode. Subsequent EWDS instruction or power cycle restores protection - ensuring accidental writes cannot occur without explicit host authorization.
AT93C57W-10SC-2.5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 256 x 8, 128 x 16
- Memory Interface:
- 3-Wire Serial
- Clock Frequency:
- 2 MHz
- Write Cycle Time - Word, Page:
- 10ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT93C57W-10SC-2.5 FAQ
1.How can I place an order for AT93C57W-10SC-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C57W-10SC-2.5 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 AT93C57W-10SC-2.5 reliable?
The price and inventory of AT93C57W-10SC-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT93C57W-10SC-2.5 is usually 5 days.
3.What payment methods are accepted for AT93C57W-10SC-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C57W-10SC-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C57W-10SC-2.5?
AT93C57W-10SC-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C57W-10SC-2.5 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 AT93C57W-10SC-2.5?
For technical support, including AT93C57W-10SC-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C57W-10SC-2.5 requirements.
6.How does Aetrix verify that AT93C57W-10SC-2.5 is sourced from the original manufacturer or authorized distributors?
All AT93C57W-10SC-2.5 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 AT93C57W-10SC-2.5 meets industry standards.
7.What is the process for return or replacement of AT93C57W-10SC-2.5?
All AT93C57W-10SC-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C57W-10SC-2.5, 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 AT93C57W-10SC-2.5 part is unused and in its original packaging.
Return procedure for AT93C57W-10SC-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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