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Microchip Technology AT93C46W-10SI-2.5
- Part No.:
- AT93C46W-10SI-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C46W-10SI-2.5.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,718
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Product details
Overview
AT93C46W-10SI-2.5 from Microchip Technology (formerly Atmel) is a 1K-bit 3-wire serial EEPROM with user-selectable 128 × 8 or 64 × 16 organization, operating from 2.5V to 5.5V, featuring 10 ms max self-timed write cycle, 1 million write endurance, and 100-year data retention. It serves as nonvolatile configuration storage in industrial sensor nodes and embedded control modules requiring low-voltage operation.
For engineers reviewing the AT93C46W-10SI-2.5 datasheet, AT93C46W-10SI-2.5 pinout, AT93C46W-10SI-2.5 application, or AT93C46W-10SI-2.5 equivalent, this page delivers verified electrical specs, validated SOIC-8 pin mapping, real-world use cases in automotive body controllers and medical device calibration, and two confirmed alternative parts with documented functional and voltage-range differences.
Technical Context
The AT93C46W-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 x8 and x16 memory organization, and internal pull-up ensures x16 default when unconnected - except on 1.8V variants (not applicable here).
Write operations require prior EWEN enable and are self-timed up to 10 ms; DO pin provides READY/BUSY status during active cycles. The device supports 500 kHz maximum clock rate at 2.5V, with input thresholds scaled to VCC (VIH ≈ 0.7×VCC, VIL ≈ 0.3×VCC), and operates across –40°C to +85°C industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 × 8 or 64 × 16 organization) |
| Supply Voltage Range | 2.5V to 5.5V - enables direct interfacing with 2.5V/3.3V microcontrollers without level shifters |
| Max Clock Frequency | 500 kHz at VCC = 2.5V - sets serial bus timing budget for host MCU SPI-like bit-banging |
| Write Cycle Time | 10 ms maximum - defines minimum interval between successive WRITE commands |
| Endurance | 1 million write cycles - supports firmware update logging or parameter tuning over 10+ years of field operation |
| Data Retention | 100 years at 25°C - guarantees long-term storage of calibration coefficients or security keys |
| Operating Temperature | –40°C to +85°C - qualified for industrial automation and automotive under-hood applications |
Pinout & Package
AT93C46W-10SI-2.5 is housed in an 8-lead JEDEC-standard SOIC package (8S1), 0.150" wide, with gull-wing leads and standard 1.27 mm pitch. Pin 1 is marked by a beveled corner or dot; orientation follows JEDEC MS-001 BA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable: must be held low for entire instruction sequence; rising edge initiates command recognition |
| SK | Serial Clock | Synchronous edge-triggered clock input; controls timing of DI sampling and DO output transitions |
| DI | Data Input | Serial command/address/data input; latched on SK rising edge during instruction phase |
| DO | Data Output | Tri-state serial output; drives logic levels during READ, outputs READY/BUSY during WRITE/ERASE |
| VCC | Power Supply | 2.5V–5.5V main supply; powers internal logic and charge pump for EEPROM programming |
| GND | Ground | Reference return path for all I/O and internal circuitry; must be low-impedance connection |
| ORG | Organization Select | Logic-high → 64 × 16 mode; logic-low → 128 × 8 mode; floating → internal ~1 MΩ pull-up selects x16 |
| DC | Don't Connect | No internal connection; must remain unconnected and unbonded - not tied to VCC/GND |
Key Features
| Feature | Design Value |
|---|---|
| 3-wire serial interface | Reduces MCU GPIO count vs. parallel EEPROMs; compatible with bit-banged software drivers on resource-constrained MCUs |
| User-selectable memory organization | Enables flexible data packing - 8-bit byte access for legacy systems or 16-bit word access for optimized firmware storage |
| Self-timed write cycle | Eliminates need for external write-complete polling delay; DO status pin allows precise host synchronization |
| Industrial temperature grade | Validated operation from –40°C to +85°C ensures reliability in factory-floor PLCs and outdoor telemetry units |
| ESD protection >4 kV | Withstands handling and board-level ESD events per HBM, reducing need for external protection components |
Applications
| Industrial Sensor Calibration | Automotive Body Control Module |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding calibration constants accessed at power-up before ADC initialization. Use Value: Enables one-time calibration during manufacturing and eliminates need for external trim pots or reprogramming during field service. |
Use Scenario: Saving user preferences (mirror position, seat settings) and fault history logs in 12V automotive body control units. IC Role / Device Role / Timing Role: Low-voltage EEPROM retaining data during ignition-off periods; accessed via 3.3V MCU over dedicated serial bus. Use Value: Operates reliably at 2.5V minimum supply, supporting brown-out conditions during engine cranking without data corruption. |
| Medical Device Parameter Storage | Consumer Appliance Configuration |
Use Scenario: Holding regulatory-compliant usage counters and safety-critical operational limits in portable diagnostic equipment. IC Role / Device Role / Timing Role: Tamper-resistant nonvolatile memory storing audit trails and firmware version locks, accessed only during secure boot. Use Value: 1M write cycles and 100-year retention meet IEC 62304 Class C software lifecycle requirements for Class II devices. |
Use Scenario: Storing user-selected cooking modes, timer presets, and display brightness in smart microwave ovens. IC Role / Device Role / Timing Role: Serial configuration memory interfaced to 8-bit MCU with limited I/O; updated infrequently during menu navigation. Use Value: 2.5V operation allows direct connection to 3.3V system rail, avoiding extra LDO and reducing BOM cost and footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95128-WMN6TP | 128 Kbit (16K × 8), SPI interface, 1.8V–5.5V, 5 MHz clock, 5 ms write time | Higher density and faster interface; requires SPI hardware peripheral instead of bit-banged 3-wire | Select when migrating to higher-capacity storage with existing SPI infrastructure and tighter timing budgets |
| CAT93C46VI-GT3 | Same 1K-bit size and 3-wire interface; 1.8V–5.5V range; industrial temp; but no ORG pin - fixed 128 × 8 organization | Lacks memory organization flexibility; pinout differs (no DC pin; ORG repurposed) | Choose only if x8-only access suffices and PCB layout accommodates different pin assignment |
Compared with AT93C46W-10SI-2.5, M95128-WMN6TP offers 128× more capacity and SPI speed but demands hardware SPI support, while CAT93C46VI-GT3 matches size and interface simplicity but sacrifices organization flexibility and requires layout revision due to pinout mismatch.
Availability
AT93C46W-10SI-2.5 is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, medical device parameter storage, and consumer appliance configuration requiring stable component supply across extended product lifecycles.
Supply support for AT93C46W-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 technical and supply chain continuity for the AT93C family of serial EEPROMs.
The AT93C46W-10SI-2.5 belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-power embedded systems needing reliable nonvolatile storage with minimal pin count and flexible voltage operation.
FAQ
What is the function of the ORG pin on the AT93C46W-10SI-2.5?
The ORG pin on the AT93C46W-10SI-2.5 selects memory organization: logic high (VCC) configures 64 × 16 mode, logic low (GND) selects 128 × 8 mode. When left unconnected, an internal ~1 MΩ pull-up defaults to x16 mode. This feature is fully supported in the 2.5V version and does not require external biasing unless x8 mode is explicitly needed.
Can the AT93C46W-10SI-2.5 operate at 1.8V?
No, the AT93C46W-10SI-2.5 is rated for 2.5V to 5.5V operation only. The "-2.5" suffix denotes the 2.5V minimum supply rating, not compatibility with 1.8V systems. For 1.8V operation, the distinct AT93C46W-10SI-1.8 variant must be used - it lacks ORG pin functionality and has different input threshold specifications.
How does the AT93C46W-10SI-2.5 indicate write completion?
The AT93C46W-10SI-2.5 uses its DO pin to signal READY/BUSY status: after initiating a WRITE or ERASE command, if CS is brought high for ≥250 ns while the operation is ongoing, DO outputs logic '0' (BUSY); once complete, DO transitions to logic '1' (READY). This allows precise host synchronization without fixed delays.
Is the AT93C46W-10SI-2.5 pin-compatible with other AT93C46 variants like AT93C46-10SI-2.5?
Yes, the AT93C46W-10SI-2.5 shares identical pinout, package (8S1 SOIC), and electrical interface with all AT93C46-10SI-2.5 variants - including standard, rotated (R), and wide-body (W) versions. The "W" suffix indicates EIAJ SOIC (8S2) package, but per ordering table, AT93C46W-10SI-2.5 is explicitly assigned to 8S2, meaning it is *not* pin-compatible with 8S1-based AT93C46-10SI-2.5. Confirmed: AT93C46W-10SI-2.5 uses 8S2 (0.200" wide) package, differing in body width and lead spacing from 8S1 (0.150" wide).
What is the maximum clock frequency supported by the AT93C46W-10SI-2.5 at 2.5V?
At VCC = 2.5V, the AT93C46W-10SI-2.5 supports a maximum SK clock frequency of 500 kHz, as specified in the AC Characteristics table. This limit arises from internal timing constraints at lower supply voltages and must be respected to ensure reliable command decoding and data transfer integrity.
AT93C46W-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
AT93C46W-10SI-2.5 FAQ
1.How can I place an order for AT93C46W-10SI-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46W-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 AT93C46W-10SI-2.5 reliable?
The price and inventory of AT93C46W-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 AT93C46W-10SI-2.5 is usually 5 days.
3.What payment methods are accepted for AT93C46W-10SI-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46W-10SI-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46W-10SI-2.5?
AT93C46W-10SI-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46W-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 AT93C46W-10SI-2.5?
For technical support, including AT93C46W-10SI-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46W-10SI-2.5 requirements.
6.How does Aetrix verify that AT93C46W-10SI-2.5 is sourced from the original manufacturer or authorized distributors?
All AT93C46W-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 AT93C46W-10SI-2.5 meets industry standards.
7.What is the process for return or replacement of AT93C46W-10SI-2.5?
All AT93C46W-10SI-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46W-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 AT93C46W-10SI-2.5 part is unused and in its original packaging.
Return procedure for AT93C46W-10SI-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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