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Microchip Technology AT93C46C-10SI-2.5
- Part No.:
- AT93C46C-10SI-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C46C-10SI-2.5.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,810
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Product details
Overview
AT93C46C-10SI-2.5 from Microchip Technology (formerly Atmel) is a 1K-bit (64 × 16) serial EEPROM with 3-wire interface, operating at 2.5V–5.5V supply, featuring self-timed 10 ms write cycle, 1 million write endurance, and 100-year data retention. It is used in industrial control panels for parameter storage, battery-backed configuration memory in metering systems, and calibration data retention in sensor modules.
For engineers reviewing the AT93C46C-10SI-2.5 datasheet, AT93C46C-10SI-2.5 pinout, AT93C46C-10SI-2.5 application, or AT93C46C-10SI-2.5 equivalent, key selection criteria include low-voltage operation down to 2.5V, Schmitt-trigger noise-immune inputs, JEDEC SOIC-8 packaging, and support for READ/ERASE/WRITE instructions with READY/BUSY status reporting via DO pin.
Technical Context
The AT93C46C-10SI-2.5 implements a synchronous 3-wire serial interface (CS, SK, DI/DO) with instruction-based command decoding including READ, WRITE, ERASE, EWEN, and EWDS. It uses a start-bit–driven protocol where all operations begin with CS rising edge followed by opcode and address.
Its internal architecture supports byte-wise and full-array operations (ERAL/WRAL), with status feedback via DO pin when CS is asserted during self-timed cycles. The device enters Erase/Write Disable (EWDS) state on power-up and requires explicit EWEN before programming - ensuring data integrity without external lock logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (64 words × 16 bits); enables compact nonvolatile storage of calibration coefficients or device IDs. |
| Supply Voltage Range | 2.5V to 5.5V; supports direct interfacing with 2.5V, 3.3V, and 5V microcontrollers without level-shifting. |
| Write Cycle Time | Max 10 ms; deterministic timing allows predictable firmware wait-state handling during configuration updates. |
| Endurance | 1 million write cycles; suitable for field-updatable systems requiring frequent parameter reprogramming. |
| Data Retention | 100 years at +25°C; ensures long-term reliability in unattended industrial deployments. |
| Interface Speed | 2 MHz max clock rate at 5V; provides sufficient throughput for infrequent configuration reads/writes without burdening host CPU. |
| Input Noise Immunity | Schmitt-trigger inputs with filtering; eliminates false triggering in electrically noisy factory-floor environments. |
Pinout & Package
AT93C46C-10SI-2.5 is housed in an 8-lead JEDEC SOIC package (8S1), 0.150" wide body, surface-mount compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must be held low for entire instruction sequence; determines device activation window. |
| SK | Serial Clock | Host-generated synchronous clock; rising edge latches DI, falling edge samples DO; controls bit timing alignment. |
| DI | Data Input | Serial command/data input path; accepts start bit, opcode, address, and 16-bit write data per instruction. |
| DO | Data Output | Open-drain output providing read data, READY/BUSY status, or high-impedance when inactive. |
| GND | Ground Reference | Primary return path for VCC and I/O signals; requires low-impedance PCB connection to minimize noise coupling. |
| VCC | Power Supply | Single-supply input supporting 2.5V–5.5V; powers internal logic and memory array; bypass capacitor required. |
| NC | No Connect | Internally unused pin; must remain unconnected per datasheet; no routing or termination required. |
| DC | Don't Connect | Reserved pin; not bonded internally; must be left floating; no electrical or mechanical loading permitted. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed Write Cycle | Eliminates need for external timing control or polling overhead - firmware waits only for DO status transition after CS assertion. |
| Erase/Write Enable Security | Requires explicit EWEN instruction before any programming; prevents accidental overwrites during power transients or software glitches. |
| READY/BUSY Status Reporting | DO pin returns logic '0' during active write/erase and '1' upon completion - enables real-time status monitoring without fixed delays. |
| Full-Array Erase & Write | ERAL and WRAL instructions allow bulk initialization or recovery - critical for factory reset or firmware rollback sequences. |
| Low-Voltage Operation | Guaranteed functionality at 2.5V minimum VCC - supports energy-harvesting and battery-powered designs with aging cells. |
Applications
| Industrial Control Panel Configuration | Smart Energy Meter Calibration Storage |
|---|---|
Use Scenario: Storing user-defined setpoints, alarm thresholds, and communication parameters in PLC-mounted HMI units. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent settings across power cycles; accessed during boot and runtime updates. Use Value: Enables field technicians to modify operational behavior without firmware reflashing - reducing service downtime and support cost. | Use Scenario: Retaining meter-specific calibration constants (e.g., current/voltage gain factors) after factory programming and field deployment. IC Role / Device Role / Timing Role: Tamper-resistant calibration memory; written once during production and read at every power-on for ADC offset correction. Use Value: Maintains metrological accuracy over 10+ years without recalibration - meeting ANSI C12.20 and IEC 62053 standards. |
| Automotive Body Control Module Settings | Medical Sensor Module ID & Trim Data |
Use Scenario: Saving seat/mirror position presets, lighting profiles, and door lock preferences in 12V automotive BCMs operating down to 9V cold-crank. IC Role / Device Role / Timing Role: Low-voltage EEPROM interfaced directly to 3.3V MCU; retains user preferences even during battery disconnect. Use Value: Supports AEC-Q100 Grade 2 temperature range (-40°C to +105°C) and withstands load-dump transients via robust input filtering. | Use Scenario: Storing unique sensor serial numbers, manufacturing date, and analog front-end trim values in portable ECG or SpO₂ modules. IC Role / Device Role / Timing Role: Secure identity and calibration vault; accessed only during device initialization to configure precision analog paths. Use Value: Ensures traceability and measurement repeatability across production batches - satisfying ISO 13485 and FDA design control requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95128-DRMN6TP/K | 128 Kbit (16K × 8), SPI interface, 1.8V–5.5V, 5 ms write time, 4M endurance. | Higher density, faster write, SPI-only protocol - requires host driver rewrite and layout change. | Select when >1K storage or SPI-native host architecture is required; not drop-in compatible. |
| 25AA010A-I/SN | 1 Kbit (128 × 8), SPI interface, 1.8V–5.5V, 5 ms write time, 1M endurance, same SOIC-8 footprint. | Same capacity but 8-bit organization; lacks ERAL/WRAL and READY/BUSY reporting; no EWEN/EWDS security. | Choose for cost-sensitive SPI-based designs where instruction set simplicity outweighs status feedback needs. |
Compared with M95128-DRMN6TP/K and 25AA010A-I/SN, the AT93C46C-10SI-2.5 offers unique 3-wire compatibility, hardware-enforced write protection, and real-time status signaling - making it optimal for legacy microcontroller interfaces and safety-critical configuration storage where deterministic timing and data integrity are prioritized over raw density or speed.
Availability
AT93C46C-10SI-2.5 is available at Aetrix Electronics and suitable for industrial control panels, smart energy meters, automotive body control modules, and medical sensor modules requiring stable component supply and long-term obsolescence management.
Supply support for AT93C46C-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 global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with a focus on embedded control and connectivity.
The AT93C46C-10SI-2.5 belongs to Microchip's legacy serial EEPROM product line, designed specifically for space-constrained, low-power industrial and automotive applications requiring reliable, instruction-secure configuration storage.
FAQ
What voltage range does the AT93C46C-10SI-2.5 support, and how does it affect system design?
The AT93C46C-10SI-2.5 operates from 2.5V to 5.5V, enabling direct integration with 2.5V, 3.3V, and 5V microcontrollers without level shifters. Its guaranteed functionality at 2.5V supports battery-powered and energy-harvesting systems where supply voltage degrades over time. This wide range simplifies power architecture and reduces bill-of-materials cost compared to narrow-voltage alternatives.
How does the AT93C46C-10SI-2.5 handle write protection and data security?
The AT93C46C-10SI-2.5 enforces write protection through an Erase/Write Enable (EWEN) instruction that must precede any programming operation. It defaults to Erase/Write Disable (EWDS) on power-up, preventing accidental writes during brown-out or reset conditions. This hardware-level security eliminates reliance on software flags or external lock pins, significantly improving data integrity in mission-critical applications like medical or industrial control systems.
Can the AT93C46C-10SI-2.5 report write completion status, and how is it implemented?
Yes, the AT93C46C-10SI-2.5 reports READY/BUSY status via its DO pin: logic '0' indicates ongoing write/erase, and logic '1' confirms completion. This occurs when CS is brought high after tCS (≥250 ns) during the self-timed cycle. Unlike polling fixed delays, this real-time feedback allows precise firmware synchronization - reducing worst-case latency and improving system responsiveness in time-sensitive applications.
What is the memory organization of the AT93C46C-10SI-2.5, and why does it matter for firmware development?
The AT93C46C-10SI-2.5 organizes its 1024 bits as 64 words of 16 bits each, requiring firmware to manage 16-bit-aligned addresses and data transfers. This structure simplifies storage of signed/unsigned 16-bit parameters (e.g., calibration offsets, scaling factors) without bit-packing logic. It also aligns with common MCU register widths, reducing software overhead versus 8-bit-per-word EEPROMs that require byte concatenation for multi-byte values.
Is the AT93C46C-10SI-2.5 pin-compatible with other members of the AT93C46 family, and what should designers verify?
Yes, the AT93C46C-10SI-2.5 shares identical pinout and package (JEDEC SOIC-8) with all AT93C46 variants, including -10PI-2.7 and -10SI-2.7. Designers must verify VCC operating range compatibility (2.5V–5.5V vs. 2.7V–5.5V) and ensure host firmware accounts for voltage-dependent timing limits - especially tSKH/tSKL and fSK - which differ slightly between versions per the AC characteristics table.
AT93C46C-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:
- 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
AT93C46C-10SI-2.5 FAQ
1.How can I place an order for AT93C46C-10SI-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46C-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 AT93C46C-10SI-2.5 reliable?
The price and inventory of AT93C46C-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 AT93C46C-10SI-2.5 is usually 5 days.
3.What payment methods are accepted for AT93C46C-10SI-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46C-10SI-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46C-10SI-2.5?
AT93C46C-10SI-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46C-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 AT93C46C-10SI-2.5?
For technical support, including AT93C46C-10SI-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46C-10SI-2.5 requirements.
6.How does Aetrix verify that AT93C46C-10SI-2.5 is sourced from the original manufacturer or authorized distributors?
All AT93C46C-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 AT93C46C-10SI-2.5 meets industry standards.
7.What is the process for return or replacement of AT93C46C-10SI-2.5?
All AT93C46C-10SI-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46C-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 AT93C46C-10SI-2.5 part is unused and in its original packaging.
Return procedure for AT93C46C-10SI-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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