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Microchip Technology AT93C57W-10SI
- Part No.:
- AT93C57W-10SI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C57W-10SI.pdf
- Description:
- IC EEPROM 2KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,863
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Product details
Overview
AT93C57W-10SI from Microchip Technology (formerly Atmel) is a 2K-bit 3-wire serial EEPROM with user-selectable 256 × 8 or 128 × 16 organization, operating from 2.7V 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, power supply supervisors, and embedded system boot loaders.
For engineers reviewing the AT93C57W-10SI datasheet, AT93C57W-10SI pinout, AT93C57W-10SI application, or AT93C57W-10SI equivalent, key selection criteria include voltage range compatibility (2.7–5.5V), industrial temperature rating (−40°C to +85°C), SOIC-8 package footprint, and ORG-pin configurable memory width for flexible data alignment in microcontroller-based systems.
Technical Context
The AT93C57W-10SI implements a synchronous 3-wire serial interface (CS, SK, DI/DO) with instruction-set-driven operation including READ, WRITE, ERASE, EWEN, and EWDS. Its internal logic decodes 7-bit addresses (A7–A0) for x8 mode or 6-bit addresses (A6–A0) for x16 mode based on ORG pin state.
Write enable requires explicit EWEN instruction before programming; all writes are self-timed with READY/BUSY status reported via DO when CS is raised post-initiation. The device supports VCC-dependent clock rate scaling-up to 2 MHz at 5V, down to 250 kHz at 1.8V-with tSKH/tSKL ≥ 250 ns minimum at 2.7V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8 or 128 × 16 words), enabling compact firmware parameter storage without external address latching |
| Supply Voltage Range | 2.7V to 5.5V - compatible with both 3.3V and 5V system rails without level-shifting |
| Write Endurance | 1 million cycles - supports frequent calibration or runtime configuration updates over product lifetime |
| Data Retention | 100 years at 25°C - ensures long-term reliability for unattended industrial deployments |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade environments including motor drives and PLCs |
| Max Clock Frequency | 1 MHz at 2.7V - enables deterministic timing margins in noise-sensitive applications |
| Standby Current | 10 µA at 2.7V - minimizes quiescent power in battery-backed or energy-harvesting systems |
Pinout & Package
AT93C57W-10SI is housed in an 8-lead JEDEC SOIC (8S1) package, 0.150" wide, with standard gull-wing lead form and 1.27 mm pitch. Pin 1 is marked by a beveled corner or dot; package meets RoHS and JEDEC MS-001BA standards.
| 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 during standby |
| SK | Serial Clock | Synchronous edge-triggered input; rising edge samples DI, falling edge outputs DO; defines bit timing resolution |
| DI | Data Input | Serial instruction/address/data input; accepts 7-bit address + opcode + optional data per WRITE/ERASE |
| DO | Data Output | Open-drain output; returns read data, READY/BUSY status, or high-Z when CS high |
| VCC | Power Supply | Primary supply rail; powers internal logic and charge pump; decoupling capacitor required within 1 cm |
| GND | Ground | Reference return path for all I/O and internal circuitry; must be low-impedance connection |
| ORG | Organization Select | Logic-high = 128 × 16 (x16); logic-low = 256 × 8 (x8); internal ~1 MΩ pull-up defaults to x16 if floating |
| DC | Don't Connect | No internal connection; must remain unconnected and unbonded; not usable as NC or tie-off |
Key Features
| Feature | Design Value |
|---|---|
| User-selectable memory organization | Hardware-configurable x8/x16 word width via ORG pin eliminates software bit-packing overhead |
| Self-timed write cycle | Fixed 10 ms max duration with READY/BUSY reporting avoids need for external timeout logic or polling delay loops |
| Multi-voltage operation | Single part supports 2.7–5.5V range - reduces BOM count across 3.3V and 5V board variants |
| Industrial temperature grade | Rated −40°C to +85°C with full DC/AC specs guaranteed - suitable for under-hood automotive ECUs and factory-floor controllers |
| ESD protection | Exceeds 4000V HBM - enhances robustness during handling and in-field hot-swap scenarios |
Applications
| Industrial Sensor Calibration | Embedded Boot Configuration |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and linearization tables in pressure transmitters. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed once at power-up by MCU via SPI-compatible 3-wire interface. Use Value: Enables field-replaceable sensors without reprogramming host firmware; ORG pin allows 16-bit coefficient alignment matching ADC output width. |
Use Scenario: Holding bootloader configuration flags (e.g., UART baud rate, boot source priority, watchdog timeout) in network edge gateways. IC Role / Device Role / Timing Role: Early-boot configuration register accessed before main application starts; supports fail-safe recovery mode selection. Use Value: Eliminates hardcoded settings in flash; permits remote firmware update of boot behavior without reflashing entire MCU image. |
| Power Supply Trim Storage | Motor Drive Parameter Set |
Use Scenario: Saving digitally trimmed DAC codes for output voltage/current regulation in programmable DC supplies. IC Role / Device Role / Timing Role: Write-once-per-calibration nonvolatile storage interfaced during manufacturing test; read at every power-on reset. Use Value: Achieves ±0.1% output accuracy without precision analog components; 1M endurance supports recalibration over 10+ years. |
Use Scenario: Storing motor-specific parameters (pole count, encoder resolution, current limits) in servo drives supporting multiple motor models. IC Role / Device Role / Timing Role: Runtime-accessible configuration table queried by motion controller during motor initialization sequence. Use Value: Enables plug-and-play motor replacement; x8/x16 flexibility matches 8-bit register maps or 16-bit floating-point tuning values. |
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 (4-wire), 2.5–5.5V, 5 ms write time, no ORG pin | Higher density but fixed 32K × 8 organization; requires SPI master instead of generic GPIO bit-banging | Select when >2K capacity needed and SPI peripheral available; not drop-in due to protocol and pinout mismatch |
| CAT93C57VI-GT3 | Pin-compatible 2K EEPROM, same SOIC-8, 1.8–5.5V, 5 ms write, no ORG pin (x16 only) | Lacks ORG-selectable organization; supports lower 1.8V operation but removes x8 mode flexibility | Valid alternative if x16-only usage suffices and 1.8V support is required; identical footprint and timing at 2.7V+ |
Compared with M95256-WMN6TP and CAT93C57VI-GT3, the AT93C57W-10SI uniquely offers hardware-selectable memory width and industrial temp rating in a proven 3-wire architecture - critical for resource-constrained MCUs lacking dedicated SPI or requiring dual-format data storage.
Availability
AT93C57W-10SI is available at Aetrix Electronics and suitable for industrial automation, power electronics, and embedded communications equipment requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for AT93C57W-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 acquired Atmel in 2016 and maintains full support for legacy Atmel EEPROMs, offering long-term supply assurance and technical documentation continuity.
The AT93C57W-10SI belongs to Microchip's legacy serial EEPROM family designed for cost-sensitive, low-pin-count embedded systems needing reliable nonvolatile storage with minimal MCU resource usage.
FAQ
What is the function of the ORG pin on the AT93C57W-10SI?
The ORG pin on the AT93C57W-10SI selects internal memory organization: tied to VCC enables 128 × 16 (x16) mode; tied to GND enables 256 × 8 (x8) mode. An internal ~1 MΩ pull-up defaults to x16 if left unconnected. This hardware-selectable width eliminates software bit manipulation and aligns with MCU data bus widths - a key differentiator of the AT93C57W-10SI versus fixed-organization EEPROMs.
Does the AT93C57W-10SI require an external write-enable command before every write operation?
Yes - the AT93C57W-10SI requires an explicit EWEN (Erase/Write Enable) instruction before any ERASE or WRITE command can execute. This prevents accidental overwrites during power transitions or noise events. The AT93C57W-10SI remains in EWDS (Erase/Write Disable) state after power-up until EWEN is issued, ensuring data integrity without external hardware locking.
What is the maximum clock frequency supported by the AT93C57W-10SI at 2.7V supply?
At VCC = 2.7V, the AT93C57W-10SI supports a maximum SK clock frequency of 1 MHz, with minimum SK high/low times of 250 ns each. This is specified in the AC Characteristics table for the 2.7V ≤ VCC ≤ 5.5V range. Exceeding this limit risks setup/hold violations and read/write corruption - the AT93C57W-10SI does not auto-throttle clock rate.
Can the AT93C57W-10SI be used in a 1.8V system?
No - the AT93C57W-10SI is rated for 2.7V to 5.5V operation only. While the broader AT93Cxx family includes -1.8 suffix variants (e.g., AT93C57-10SI-1.8), the AT93C57W-10SI specifically uses the -2.7 option, meaning its internal charge pump and logic thresholds are optimized for ≥2.7V. Using it below 2.7V may cause unreliable reads, failed writes, or premature wear.
How is READY/BUSY status reported during a write cycle on the AT93C57W-10SI?
During a write cycle, the AT93C57W-10SI reports READY/BUSY status on the DO pin: if CS is brought high after ≥250 ns low-time (tCS), DO outputs logic '0' while programming continues and logic '1' when complete. This status is only valid if CS is asserted high *during* the self-timed tWP window (≤10 ms); asserting CS high after tWP expires yields undefined DO state - a key timing constraint unique to the AT93C57W-10SI's protocol.
AT93C57W-10SI 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT93C57W-10SI FAQ
1.How can I place an order for AT93C57W-10SI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C57W-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 AT93C57W-10SI reliable?
The price and inventory of AT93C57W-10SI 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 is usually 5 days.
3.What payment methods are accepted for AT93C57W-10SI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C57W-10SI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C57W-10SI?
AT93C57W-10SI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C57W-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 AT93C57W-10SI?
For technical support, including AT93C57W-10SI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C57W-10SI requirements.
6.How does Aetrix verify that AT93C57W-10SI is sourced from the original manufacturer or authorized distributors?
All AT93C57W-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 AT93C57W-10SI meets industry standards.
7.What is the process for return or replacement of AT93C57W-10SI?
All AT93C57W-10SI units undergo pre-shipment inspection (PSI). If there is an issue with AT93C57W-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 AT93C57W-10SI part is unused and in its original packaging.
Return procedure for AT93C57W-10SI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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