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Microchip Technology AT93C46A-10SI-2.5
- Part No.:
- AT93C46A-10SI-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C46A-10SI-2.5.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,487
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Product details
Overview
AT93C46A-10SI-2.5 from Microchip Technology is a 1-Kbit serial EEPROM organized as 128 × 8 or 64 × 16, supporting both 8-bit and 16-bit word configurations via ORG pin control, with 2.5 V to 5.5 V operating voltage, 10 MHz SPI-compatible clock, and 1 million write cycles endurance.
For engineers reviewing the AT93C46A-10SI-2.5 datasheet, AT93C46A-10SI-2.5 pinout, AT93C46A-10SI-2.5 application, or AT93C46A-10SI-2.5 equivalent, key selection considerations include ORG pin-configurable memory organization, industrial temperature range (–40°C to +85°C), SOIC-8 package compatibility, and hardware write-protect via WP pin.
Technical Context
The AT93C46A-10SI-2.5 implements a Microwire-compatible 3-wire serial interface (CS, SK, DI/DO) with dual-directional data I/O on a single pin, supporting both read and write operations under software-controlled timing. It uses an internal address counter for sequential reads and supports byte-write and page-write (up to 32 bytes) modes.
Write protection is enforced by the dedicated WP pin, which disables all write and erase commands when asserted low; the device also includes a 10 ms typical write-cycle time and automatic erase-before-write functionality for non-volatile integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Kbit (128 × 8 or 64 × 16, selectable via ORG pin) |
| Interface | Microwire-compatible 3-wire serial (CS, SK, DI/DO) |
| Supply Voltage | 2.5 V to 5.5 V - enables direct integration with 2.5 V, 3.3 V, and 5 V logic systems |
| Max Clock Frequency | 10 MHz - supports high-speed configuration loading in real-time systems |
| Endurance | 1,000,000 write cycles - suitable for frequent calibration or parameter storage |
| Data Retention | 100 years at +25°C - ensures long-term firmware or configuration persistence |
| Operating Temp | –40°C to +85°C - validated for industrial-grade embedded operation |
Pinout & Package
AT93C46A-10SI-2.5 is housed in an 8-pin SOIC package (SOIC-8, 150 mil width) with standard lead pitch and gull-wing terminations for surface-mount reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for serial communication; must be low during instruction/data transfer |
| SK | Serial Clock | Input clock synchronizing all data transfers; up to 10 MHz frequency supported |
| DI/DO | Serial Data I/O | Bidirectional pin carrying instruction, address, and data; direction controlled by internal state machine |
| ORG | Organization Select | High = 64 × 16 mode; Low = 128 × 8 mode - sets memory word width at power-up |
| WP | Write Protect | Active-low hardware lock disabling all write/erase commands when pulled low |
| VCC | Power Supply | 2.5 V to 5.5 V supply input; decoupling capacitor required near pin |
| VSS | Ground | Reference ground for all digital and memory circuitry |
| NC | No Connect | Internally unconnected pin; must remain floating or tied to VSS per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Configurable Memory Organization | Hardware-selectable 128 × 8 or 64 × 16 layout via ORG pin - eliminates need for firmware remapping |
| Hardware Write Protection | Dedicated WP pin provides fail-safe, zero-software-overhead write disable - critical for field-deployed calibration data |
| Page Write Capability | 32-byte page write mode reduces programming time vs. byte-by-byte writes - improves boot-time configuration load efficiency |
| Low-Voltage Operation | 2.5 V minimum supply enables use in battery-backed or energy-constrained subsystems without level-shifting |
| Industrial Temperature Range | –40°C to +85°C operation confirmed across full voltage range - supports deployment in motor drives and PLC modules |
Applications
| Industrial Sensor Calibration | Embedded Boot Configuration |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients in programmable logic controllers and analog front-end modules. IC Role / Device Role / Timing Role: Non-volatile configuration storage with guaranteed 100-year data retention and hardware write-lock. Use Value: Prevents accidental overwrites during field maintenance while ensuring calibration stability across product lifetime. | Use Scenario: Holding bootloader parameters, MAC addresses, and board-specific identifiers in networked edge devices. IC Role / Device Role / Timing Role: Microwire-interface EEPROM providing fast, deterministic access during cold-start initialization. Use Value: Enables reliable first-boot behavior without dependency on external flash or host processor intervention. |
| Motor Control Parameter Storage | Smart Meter Firmware Metadata |
Use Scenario: Saving runtime-tuned PID coefficients and thermal derating tables in brushless DC motor drivers. IC Role / Device Role / Timing Role: High-endurance (1M cycle) serial EEPROM supporting frequent updates during commissioning and diagnostics. Use Value: Eliminates need for external FRAM or backup RAM, reducing BOM count and layout complexity. | Use Scenario: Recording firmware version, update timestamps, and cryptographic key metadata in ANSI C12.22-compliant smart meters. IC Role / Device Role / Timing Role: Tamper-resistant, WP-pin-protected memory storing security-critical metadata with 100-year retention. Use Value: Meets utility-grade audit requirements for firmware traceability without adding secure element ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT93C46D-10SU-2.7 | Same 1-Kbit capacity and SOIC-8 package, but rated for 2.7–5.5 V supply range and features enhanced ESD protection (4 kV HBM). | Not suitable for 2.5 V-only systems; better suited for mixed-voltage industrial boards with higher noise immunity needs. | Select AT93C46D-10SU-2.7 only if system operates ≥2.7 V and requires higher ESD robustness. |
| M95128-DRMN6TP/K | 128-Kbit SPI EEPROM in same SOIC-8 footprint, but uses standard SPI (4-wire) instead of Microwire and lacks ORG pin configurability. | Requires firmware changes for interface protocol and memory addressing; no hardware-selectable word width. | Choose M95128-DRMN6TP/K only when higher density and SPI-native support outweigh ORG flexibility and Microwire compatibility. |
Compared with AT93C46D-10SU-2.7 and M95128-DRMN6TP/K, the AT93C46A-10SI-2.5 uniquely delivers 2.5 V operation, ORG-selectable organization, and Microwire compatibility - making it optimal for legacy or resource-constrained designs requiring minimal interface overhead and precise voltage margin.
Availability
AT93C46A-10SI-2.5 is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded boot configuration, and motor control parameter storage requiring stable component supply across extended product lifecycles.
Supply support for AT93C46A-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 is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and non-volatile memory solutions for industrial, automotive, and communications markets.
The AT93Cxx series was designed specifically for cost-sensitive, space-constrained embedded systems needing reliable, low-pin-count serial EEPROM with flexible memory organization and robust write protection.
FAQ
What is the memory organization flexibility of the AT93C46A-10SI-2.5?
The AT93C46A-10SI-2.5 supports two memory configurations: 128 × 8 bits or 64 × 16 bits, selected by the logic level on the ORG pin at power-up. This hardware-based selection eliminates firmware overhead and allows reuse of the same AT93C46A-10SI-2.5 part across 8-bit and 16-bit data-path designs without code modification.
Does the AT93C46A-10SI-2.5 support true SPI communication?
No, the AT93C46A-10SI-2.5 implements a Microwire-compatible 3-wire interface (CS, SK, DI/DO), not standard 4-wire SPI. It shares clock and bidirectional data on one pin, requiring specific driver support. The AT93C46A-10SI-2.5 does not support SPI mode bits or separate MOSI/MISO lines.
What is the role of the WP pin on the AT93C46A-10SI-2.5?
The WP (Write Protect) pin on the AT93C46A-10SI-2.5 is an active-low hardware lock that disables all write and erase commands when pulled low. This feature ensures calibration data or firmware metadata stored in the AT93C46A-10SI-2.5 remains immutable during normal operation or field servicing unless intentionally disabled.
Can the AT93C46A-10SI-2.5 operate reliably at 2.5 V?
Yes, the AT93C46A-10SI-2.5 is fully specified for operation from 2.5 V to 5.5 V, including all timing, endurance, and data retention parameters. Its 2.5 V minimum supply enables direct integration into low-power microcontroller subsystems without level shifters - a verified capability documented in the official Microchip AT93C46A datasheet.
Is the AT93C46A-10SI-2.5 pin-compatible with other AT93C46 variants?
Yes, the AT93C46A-10SI-2.5 shares identical SOIC-8 pinout and electrical interface with all AT93C46x-10SI-x.x variants, including AT93C46B and AT93C46D. Differences lie in voltage range, endurance rating, and ESD performance - not pin assignment or signal mapping - so PCB layout remains unchanged across these variants.
AT93C46A-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:
- 1Kbit
- Memory Organization:
- 128 x 8, 64 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
AT93C46A-10SI-2.5 FAQ
1.How can I place an order for AT93C46A-10SI-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46A-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 AT93C46A-10SI-2.5 reliable?
The price and inventory of AT93C46A-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 AT93C46A-10SI-2.5 is usually 5 days.
3.What payment methods are accepted for AT93C46A-10SI-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46A-10SI-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46A-10SI-2.5?
AT93C46A-10SI-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46A-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 AT93C46A-10SI-2.5?
For technical support, including AT93C46A-10SI-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46A-10SI-2.5 requirements.
6.How does Aetrix verify that AT93C46A-10SI-2.5 is sourced from the original manufacturer or authorized distributors?
All AT93C46A-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 AT93C46A-10SI-2.5 meets industry standards.
7.What is the process for return or replacement of AT93C46A-10SI-2.5?
All AT93C46A-10SI-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46A-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 AT93C46A-10SI-2.5 part is unused and in its original packaging.
Return procedure for AT93C46A-10SI-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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