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Microchip Technology AT93C46W-10SI-1.8
- Part No.:
- AT93C46W-10SI-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C46W-10SI-1.8.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,488
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Product details
Overview
AT93C46W-10SI-1.8 from Microchip Technology (formerly Atmel) is a 1K-bit, three-wire serial EEPROM with user-selectable 128 × 8 or 64 × 16 organization, operating from 1.8V to 5.5V supply, featuring 2 MHz clock rate at 5V, self-timed 10 ms max write cycle, and automotive-grade reliability (1M write cycles, 100-year data retention). It is used in industrial control panels for parameter storage and calibration data retention.
For engineers reviewing the AT93C46W-10SI-1.8 datasheet, AT93C46W-10SI-1.8 pinout, AT93C46W-10SI-1.8 application, or AT93C46W-10SI-1.8 equivalent, key selection considerations include low-voltage operation down to 1.8V, ORG-pin-configurable memory width, SOIC-8 packaging, and compatibility with legacy 3-wire SPI-like host interfaces requiring minimal GPIO resources.
Technical Context
The AT93C46W-10SI-1.8 implements a synchronous three-wire serial interface (CS, SK, DI/DO) with start-bit–driven instruction decoding and no external clock dependency beyond SK. Its internal organization is selected via the ORG pin (VCC = x16, GND = x8), and it supports seven instructions including READ, WRITE, ERASE, EWEN/EWDS, and bulk operations (ERAL/WRAL) - though WRAL/ERAL are restricted to 4.5–5.5V operation.
It operates across −40°C to +85°C, features 5 pF input/output capacitance, and delivers 0.1 µA standby current at 1.8V. The device uses on-chip charge pumps for write/erase voltage generation and includes Ready/Busy status reporting via DO during active programming when CS is asserted post-instruction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 × 8 or 64 × 16 words), enabling compact configuration storage without external address decoding logic |
| Supply Voltage Range | 1.8V to 5.5V - supports direct interfacing with 1.8V I/O domains and mixed-voltage systems without level shifters |
| Max Clock Frequency | 2 MHz at VCC = 5V; 1 MHz at VCC = 2.7V; 0.25 MHz at VCC = 1.8V - defines maximum serial throughput and host MCU timing budget |
| Write Cycle Time | 10 ms maximum (self-timed) - eliminates need for external write-complete polling delay or timeout management in firmware |
| Endurance & Retention | 1 million write cycles and 100 years data retention - suitable for field-updatable calibration tables in industrial equipment |
| Operating Temperature | −40°C to +85°C industrial grade - validated for use in motor drives, HVAC controllers, and factory automation modules |
| Package | 8-lead EIAJ SOIC (8S2), 0.209" body width - compatible with standard SOIC-8 reflow profiles and automated optical inspection |
Pinout & Package
AT93C46W-10SI-1.8 is housed in an 8-lead EIAJ SOIC (8S2) package per JEDEC MS-012 variant, with gull-wing leads, 1.27 mm pitch, and 5.13–5.35 mm body width (D), 7.70–8.26 mm length (E).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must be held low for entire instruction sequence; initiates communication on rising edge |
| SK | Serial Clock | Input clock synchronizing all data transfers; rising edge samples DI, falling edge outputs DO |
| DI | Data Input | Serial instruction and address/data input; accepts 7-bit start bit + op code + address + data stream |
| DO | Data Output | Open-drain output providing read data or Ready/Busy status (logic 1 = ready, 0 = busy) when CS is high mid-cycle |
| GND | Ground Reference | Primary return path for VCC and all I/O; requires low-impedance connection to minimize noise coupling into serial interface |
| VCC | Power Supply | 1.8V–5.5V supply powering core logic and internal charge pump; bypass capacitor (0.1 µF) required near pin |
| ORG | Organization Select | Logic-high = 64 × 16 mode; logic-low = 128 × 8 mode; unconnected defaults to x16 only on ≥2.7V parts - not functional at 1.8V |
| DC | No-connect | Internally unused terminal; must remain floating or tied to GND/VCC per board layout constraints - no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| Three-wire serial interface | Reduces host GPIO count to just 3 pins (CS/SK/DI+DO), ideal for resource-constrained microcontrollers and space-limited PCBs |
| User-selectable memory organization | Supports either byte-oriented (128×8) or word-oriented (64×16) access via ORG pin, simplifying firmware alignment and data structure mapping |
| Self-timed write cycle | Eliminates need for external write-complete interrupts or fixed delays; host reads DO pin status to determine readiness |
| Low-power standby mode | 0.1 µA typical ISB1 at 1.8V enables always-on configuration storage in battery-backed systems without significant drain |
| Automotive-grade reliability | Qualified to extended temperature range (−40°C to +85°C) and 1M endurance, meeting requirements for industrial control and automotive subsystems |
Applications
| Industrial Motor Control | Smart Energy Metering |
|---|---|
|
Use Scenario: Storing motor calibration coefficients, fault history logs, and runtime parameters in variable-frequency drives. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during boot and runtime via 3-wire interface; no timing-critical setup required. Use Value: Enables field recalibration without firmware update; 1.8V operation allows direct interface with low-power MCU sleep domains. |
Use Scenario: Retaining tariff schedules, metering constants, and tamper-event timestamps in DIN-rail energy meters. IC Role / Device Role / Timing Role: Serial configuration EEPROM interfaced to metrology SoC's GPIOs; supports secure write-protection via EWDS. Use Value: 100-year data retention ensures lifetime compliance with utility regulatory requirements; 8S2 package fits narrow meter PCBs. |
| Automotive Body Control Module | Medical Diagnostic Equipment |
|
Use Scenario: Saving seat position presets, mirror angles, and lighting profiles in BCMs for premium vehicles. IC Role / Device Role / Timing Role: Low-voltage EEPROM storing user preferences; accessed during power-up sequence before CAN initialization. Use Value: 1.8V compatibility avoids level-shifting between 1.8V microcontroller I/O and EEPROM; AEC-Q200 stress qualification confirmed. |
Use Scenario: Holding sensor calibration offsets, diagnostic test patterns, and regulatory audit trails in portable ultrasound units. IC Role / Device Role / Timing Role: Trusted nonvolatile memory for safety-critical configuration data; write-protected via EWDS after factory programming. Use Value: 1M write endurance supports frequent recalibration during service; industrial temp range covers clinical environment variations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT93C46-10SI-1.8 | Same 1K-bit capacity and 1.8V operation, but in JEDEC SOIC (8S1) instead of EIAJ SOIC (8S2); pinout identical, body width narrower (0.150" vs 0.209") | Preferred where board space permits tighter lead pitch and JEDEC-compliant footprint is required | Select AT93C46-10SI-1.8 for new designs needing JEDEC SOIC compatibility and standardized land pattern |
| M95128-WMN6TP | 128 Kbit SPI EEPROM (16× larger), 1.8V–5.5V, 20 MHz SPI interface, WLCSP package - not pin-compatible; requires different command set and clock handling | Suitable for applications needing higher density or faster throughput, but demands SPI controller and firmware rewrite | Choose M95128-WMN6TP only when migrating to SPI architecture and requiring >1K storage; not a drop-in replacement |
Compared with AT93C46-10SI-1.8, the AT93C46W-10SI-1.8 offers identical electrical specs but guarantees EIAJ SOIC mechanical form factor for legacy board layouts; versus M95128-WMN6TP, it retains the simpler 3-wire protocol and lower gate count but trades off density and speed for proven interoperability in cost-sensitive embedded systems.
Availability
AT93C46W-10SI-1.8 is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, automotive body electronics, and medical diagnostic equipment requiring stable component supply across long product lifecycles.
Supply support for AT93C46W-10SI-1.8 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 manufacturing commitment and technical documentation continuity.
The AT93C46 series belongs to Microchip's legacy serial EEPROM portfolio, designed specifically for cost-sensitive, low-pin-count embedded systems requiring reliable nonvolatile storage with minimal host resource usage.
FAQ
What is the valid supply voltage range for AT93C46W-10SI-1.8?
The AT93C46W-10SI-1.8 operates from 1.8V to 5.5V. This 1.8V minimum enables direct connection to modern ultra-low-power MCUs without level shifting. Operation below 1.8V is not guaranteed, and voltages above 5.5V exceed absolute maximum ratings and risk permanent damage to the AT93C46W-10SI-1.8.
How does the ORG pin affect memory organization in AT93C46W-10SI-1.8?
In AT93C46W-10SI-1.8, the ORG pin selects between 128 × 8 (ORG = GND) and 64 × 16 (ORG = VCC) configurations. However, the internal pull-up is inactive at 1.8V, so ORG must be actively driven - unlike higher-voltage variants. Leaving ORG floating at 1.8V results in undefined behavior and is not supported for the AT93C46W-10SI-1.8.
Can AT93C46W-10SI-1.8 be used with a standard SPI interface?
The AT93C46W-10SI-1.8 uses a proprietary three-wire interface (CS/SK/DI+DO) that is not electrically or logically SPI-compatible. It lacks MOSI/MISO separation and requires start-bit–preceded instruction framing. While bit-banged GPIO can emulate its protocol, hardware SPI peripherals cannot directly drive the AT93C46W-10SI-1.8 without firmware translation.
What is the maximum clock frequency supported by AT93C46W-10SI-1.8 at 1.8V?
At VCC = 1.8V, the AT93C46W-10SI-1.8 supports a maximum SK clock frequency of 0.25 MHz, as specified in Table 4. This limit ensures reliable setup/hold timing margins for DI sampling and DO output transitions. Exceeding this frequency risks read corruption or failed writes in the AT93C46W-10SI-1.8.
Is AT93C46W-10SI-1.8 qualified for automotive applications?
The AT93C46W-10SI-1.8 is rated for industrial temperature (−40°C to +85°C) and carries automotive-grade reliability features (1M endurance, 100-year retention), but it is not AEC-Q200 certified. For automotive production, Microchip recommends the pin-compatible AT93C46-MA10-T (AEC-Q200 qualified) rather than the AT93C46W-10SI-1.8.
AT93C46W-10SI-1.8 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:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT93C46W-10SI-1.8 FAQ
1.How can I place an order for AT93C46W-10SI-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46W-10SI-1.8 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-1.8 reliable?
The price and inventory of AT93C46W-10SI-1.8 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-1.8 is usually 5 days.
3.What payment methods are accepted for AT93C46W-10SI-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46W-10SI-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46W-10SI-1.8?
AT93C46W-10SI-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46W-10SI-1.8 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-1.8?
For technical support, including AT93C46W-10SI-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46W-10SI-1.8 requirements.
6.How does Aetrix verify that AT93C46W-10SI-1.8 is sourced from the original manufacturer or authorized distributors?
All AT93C46W-10SI-1.8 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-1.8 meets industry standards.
7.What is the process for return or replacement of AT93C46W-10SI-1.8?
All AT93C46W-10SI-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46W-10SI-1.8, 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-1.8 part is unused and in its original packaging.
Return procedure for AT93C46W-10SI-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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