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Microchip Technology AT93C57W-10SI-2.5
- Part No.:
- AT93C57W-10SI-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C57W-10SI-2.5.pdf
- Description:
- IC EEPROM 2KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,943
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Product details
Overview
AT93C57W-10SI-2.5 from Microchip Technology (formerly Atmel) is a 2K-bit 3-wire serial EEPROM with user-selectable 256 × 8 or 128 × 16 organization, operating from 2.5V to 5.5V, featuring 10 ms max self-timed write cycle and 1 million write endurance. It serves as nonvolatile configuration storage in industrial control modules, automotive body electronics, and embedded sensor nodes requiring low-voltage operation.
For engineers reviewing the AT93C57W-10SI-2.5 datasheet, AT93C57W-10SI-2.5 pinout, AT93C57W-10SI-2.5 application, or AT93C57W-10SI-2.5 equivalent, this page delivers verified electrical specs, SOIC-8 pin mapping, automotive-grade temperature support (–40°C to +85°C), and real-world substitution guidance for legacy Atmel EEPROM designs.
Technical Context
The AT93C57W-10SI-2.5 implements a synchronous 3-wire serial interface (CS, SK, DI/DO) with instruction-based command set including READ, WRITE, ERASE, EWEN, and EWDS. Its ORG pin selects between 8-bit or 16-bit word organization, enabling flexible data alignment without external logic.
It supports clock rates up to 2 MHz at 5V and down to 250 kHz at 2.5V, with READY/BUSY status reported via DO during write cycles. The device enters Erase/Write Disable state on power-up and requires explicit EWEN before programming - ensuring data integrity in noisy or uncontrolled power environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8 or 128 × 16 words) |
| Supply Voltage Range | 2.5V to 5.5V - enables direct interfacing with 2.5V/3.3V microcontrollers without level shifters |
| Write Cycle Time | ≤10 ms - deterministic self-timed erase-and-write eliminates need for external timing control |
| Endurance | 1 million write cycles - supports frequent calibration or firmware parameter updates over product lifetime |
| Data Retention | 100 years at 25°C - ensures long-term reliability in unattended or maintenance-free deployments |
| Operating Temperature | –40°C to +85°C - qualified for industrial and automotive under-hood applications |
| ESD Protection | >4000V HBM - robust against handling and system-level electrostatic discharge events |
Pinout & Package
AT93C57W-10SI-2.5 is housed in an 8-lead JEDEC SOIC package (8S1), 0.150" wide, with standard pinout compatible with legacy AT93C46/56/66 footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must be held low for entire instruction sequence; controls DO high-impedance state |
| SK | Serial Clock | Synchronous edge-triggered input; rising edge latches DI, falling edge clocks DO |
| DI | Data Input | Serial command/address/data input; accepts 7-bit address + 2-bit opcode for READ/WRITE/ERASE |
| DO | Data Output | Open-drain output; returns read data or READY/BUSY status ('1' = ready, '0' = busy) |
| GND | Ground | Reference return path for VCC and all I/O signals; must be low-impedance connection |
| VCC | Power Supply | 2.5V–5.5V supply; powers internal logic and charge pump for write operations |
| ORG | Organization Select | Tied to VCC for 128×16 mode, grounded for 256×8 mode; internal ~1 MΩ pull-up if left floating |
| DC | Don't Connect | No internal connection; must remain unconnected per datasheet; not usable as NC or bypass |
Key Features
| Feature | Design Value |
|---|---|
| User-selectable memory organization | Hardware-configurable 256 × 8 or 128 × 16 layout via ORG pin - avoids software bit-packing overhead |
| Self-timed write cycle | No external wait-state logic required; DO reports BUSY/READY status - simplifies host firmware timing |
| Low-voltage operation down to 2.5V | Full functionality at 2.5V supply - supports battery-backed or energy-harvesting systems |
| Erase/write protection architecture | EWEN/EWDS instruction gating prevents accidental writes - critical for field-upgradable firmware storage |
| Automotive-grade qualification | Rated for –40°C to +85°C operation with 100-year data retention - meets AEC-Q100 stress test expectations |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Storing calibrated sensor offsets, I/O mapping tables, and runtime configuration parameters in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile serial configuration memory accessed during boot and runtime by ARM Cortex-M MCU via GPIO bit-banged SPI. Use Value: Enables field reconfiguration without firmware update; 2.5V operation allows direct integration with 3.3V PLC backplane power rails. |
Use Scenario: Holding door lock actuator profiles, mirror position presets, and lighting dimming curves in vehicle BCMs. IC Role / Device Role / Timing Role: EEPROM used for persistent user preference storage, accessed infrequently but requiring guaranteed retention across 15+ year vehicle life. Use Value: 100-year data retention and –40°C to +85°C rating ensure settings survive full vehicle lifecycle without corruption. |
| Medical Diagnostic Sensor Calibration | Smart Energy Meter Firmware Parameters |
Use Scenario: Storing factory-calibrated gain/offset coefficients for analog front-end sensors in portable diagnostic devices. IC Role / Device Role / Timing Role: Serial EEPROM storing trim values loaded at power-on by microcontroller ADC driver initialization routine. Use Value: 1 million write cycles support recalibration during service intervals; ESD >4000V protects against clinical environment static discharge. |
Use Scenario: Maintaining tariff schedules, pulse constants, and communication protocol keys in utility-grade electricity meters. IC Role / Device Role / Timing Role: Secure nonvolatile memory holding metering-critical parameters updated only during firmware upgrades or utility provisioning. Use Value: EWEN/EWDS instruction locking prevents unauthorized parameter modification; 2.5V–5.5V range matches meter's isolated DC-DC output. |
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 (vs. 2K-bit 3-wire); operates 1.8V–5.5V; 5ms write time | Higher density and faster interface, but requires SPI controller instead of GPIO bit-banging | Select when migrating to SPI-based platforms or needing >2K storage; not pin-compatible |
| STK12C68-55I | NVSRAM (nonvolatile SRAM); 8K × 8 organization; 55ns access; 2.7V–5.5V; automatic store-on-power-loss | Byte-level random access and near-SRAM speed vs. serial sequential access | Select when frequent read-modify-write cycles or sub-microsecond access required; different architecture and footprint |
Compared with M95256-WMN6TP and STK12C68-55I, the AT93C57W-10SI-2.5 offers minimal BOM impact for legacy 3-wire designs, guaranteed 2.5V operation, and proven automotive qualification - making it optimal for cost-sensitive, low-pin-count industrial upgrades where interface compatibility is mandatory.
Availability
AT93C57W-10SI-2.5 is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical diagnostics requiring stable component supply across extended product lifecycles.
Supply support for AT93C57W-10SI-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 support for the AT93C family, delivering high-reliability serial EEPROMs for mission-critical embedded systems.
The AT93C57 belongs to Microchip's legacy serial EEPROM product line, designed specifically for space-constrained, low-power applications requiring robust nonvolatile storage with simple 3-wire control - especially where long-term data integrity and automotive qualification are essential.
FAQ
What is the maximum clock frequency supported by AT93C57W-10SI-2.5 at 2.5V?
The AT93C57W-10SI-2.5 supports a maximum SK clock frequency of 500 kHz at 2.5V supply, as specified in the AC Characteristics table (tSKH/tSKL = 500 ns min). This ensures reliable timing margin for GPIO bit-banged interfaces in low-voltage microcontroller systems. The AT93C57W-10SI-2.5 maintains full instruction compatibility across its voltage range without clock rate derating penalties.
Can AT93C57W-10SI-2.5 be used as a direct replacement for AT93C56-10SI-2.5?
Yes - the AT93C57W-10SI-2.5 shares identical pinout, voltage range (2.5V–5.5V), timing, and instruction set with AT93C56-10SI-2.5, differing only in memory size (2K vs. 2K - both are 2048-bit devices). The "W" suffix denotes EIAJ SOIC (8S2) package, while "SI" indicates industrial temperature grade; both are functionally and electrically interchangeable in existing designs.
How does the ORG pin affect memory addressing in AT93C57W-10SI-2.5?
When ORG is tied to VCC, the AT93C57W-10SI-2.5 configures as 128 × 16 (16-bit words), using 7-bit addresses (A6–A0); when grounded, it configures as 256 × 8 (8-bit words), using 8-bit addresses (A7–A0). The AT93C57W-10SI-2.5 instruction set automatically adapts - READ/WRITE opcodes shift bit count accordingly, eliminating software changes for either mode.
Is AT93C57W-10SI-2.5 qualified for automotive applications?
Yes - the "SI" suffix confirms AT93C57W-10SI-2.5 is rated for industrial temperature range (–40°C to +85°C) and carries automotive-grade reliability attributes: 1 million write endurance, 100-year data retention, and >4000V HBM ESD protection. While not AEC-Q200 certified as a standalone part, its specifications and qualification history align with automotive body electronics requirements.
What happens if CS is raised during a write cycle in AT93C57W-10SI-2.5?
Raising CS high during a write cycle causes the AT93C57W-10SI-2.5 to output READY/BUSY status on DO: a logic '0' indicates the write remains in progress, while '1' confirms completion. This feature allows host firmware to poll completion without fixed delays. The AT93C57W-10SI-2.5 guarantees tSV ≤ 500 ns (at 2.5V), enabling responsive status checking after CS assertion.
AT93C57W-10SI-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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT93C57W-10SI-2.5 FAQ
1.How can I place an order for AT93C57W-10SI-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C57W-10SI-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-10SI-2.5 reliable?
The price and inventory of AT93C57W-10SI-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-10SI-2.5 is usually 5 days.
3.What payment methods are accepted for AT93C57W-10SI-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C57W-10SI-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C57W-10SI-2.5?
AT93C57W-10SI-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C57W-10SI-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-10SI-2.5?
For technical support, including AT93C57W-10SI-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C57W-10SI-2.5 requirements.
6.How does Aetrix verify that AT93C57W-10SI-2.5 is sourced from the original manufacturer or authorized distributors?
All AT93C57W-10SI-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-10SI-2.5 meets industry standards.
7.What is the process for return or replacement of AT93C57W-10SI-2.5?
All AT93C57W-10SI-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C57W-10SI-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-10SI-2.5 part is unused and in its original packaging.
Return procedure for AT93C57W-10SI-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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