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Microchip Technology AT93C46A-10SC-2.7
- Part No.:
- AT93C46A-10SC-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C46A-10SC-2.7.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,575
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Product details
Overview
AT93C46A-10SC-2.7 from Microchip Technology (formerly Atmel) is a 1K-bit (64 × 16) three-wire serial EEPROM optimized for low-voltage embedded systems. It operates from 2.7V to 5.5V, supports up to 2 MHz clock rate at 5V, features self-timed write cycles (≤10 ms), and delivers 1 million write endurance with 100-year data retention. It is used in industrial control modules for parameter storage and calibration data backup.
For engineers reviewing the AT93C46A-10SC-2.7 datasheet, AT93C46A-10SC-2.7 pinout, AT93C46A-10SC-2.7 application, or AT93C46A-10SC-2.7 equivalent, key selection considerations include its 2.7V–5.5V supply range, 8-lead SOIC package, three-wire interface timing compliance, automotive-grade temperature rating (−40°C to +85°C), and support for ERASE/WRITE ENABLE (EWEN) and status-read functionality via DO pin.
Technical Context
The AT93C46A-10SC-2.7 implements a synchronous three-wire serial interface (CS, SK, DI/DO) with instruction-based command decoding including READ, WRITE, ERASE, EWEN, EWDS, ERAL, and WRAL. Memory organization is fixed at 64 words × 16 bits, with no internal address pointer - each operation requires explicit 6-bit address input.
It uses a single-supply CMOS process with on-chip charge pump for write/erase operations, enabling full functionality across its 2.7V–5.5V VCC range without external high-voltage programming. Ready/busy status is reported dynamically on the DO pin when CS is asserted after tCS ≥ 250 ns during active programming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (64 × 16-bit words) - fixed word-width architecture simplifies host firmware handling of 16-bit configuration data. |
| Supply Voltage Range | 2.7V to 5.5V - enables direct interfacing with 3.3V and 5V microcontrollers without level-shifting. |
| Interface Type | Three-wire serial (CS/SK/DI/DO) - reduces PCB routing complexity versus SPI or I²C, with no dedicated chip-select bus required. |
| Max Clock Frequency | 2 MHz at VCC = 5V - supports fast read/write throughput in time-critical boot or calibration sequences. |
| Write Cycle Time | ≤10 ms (self-timed) - eliminates need for host-controlled timing delays; DO pin indicates completion asynchronously. |
| Endurance & Retention | 1 million write cycles / 100-year data retention - suitable for field-updatable firmware parameters and lifetime calibration storage. |
| Operating Temperature | −40°C to +85°C - qualified for industrial and automotive under-hood applications requiring extended thermal stability. |
Pinout & Package
AT93C46A-10SC-2.7 is supplied in an 8-lead JEDEC SOIC (package code 8S1), 3.9 mm × 4.9 mm body, 1.27 mm lead pitch, gull-wing surface-mount package.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must be held low for entire instruction sequence; DO status reporting requires CS high after tCS ≥ 250 ns. |
| SK | Serial Clock | Input clock synchronizing all data transfers; rising edge samples DI and clocks DO; max 2 MHz at 5V. |
| DI | Data Input | Serial instruction and address/data input; accepts start bit (1), op-code, and 6-bit address or 16-bit data per WRITE. |
| DO | Data Output | Open-drain output providing read data, ready/busy status (logic 0 = busy, 1 = ready), and high-impedance when CS high. |
| GND | Ground Reference | Primary return path for VCC and I/O; must be low-impedance connection to avoid noise-induced instruction errors. |
| VCC | Power Supply | Single supply input (2.7V–5.5V); powers internal logic and charge pump; decoupling capacitor (0.1 µF) required near pin. |
| DC | Device Configuration | No-connect pin in standard configuration; internally tied to VCC in factory-default mode; not user-accessible. |
| NC | No Connect | Unbonded die pad; left floating per JEDEC SOIC mechanical specification; must not be soldered or biased. |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | Functional down to 2.7V VCC - enables use in battery-backed or energy-harvesting systems where rail voltage sags below 3.0V. |
| Self-Timed Write/Erase | No external timing control needed - host processor can poll DO pin or insert fixed 10 ms delay; simplifies driver development. |
| Instruction-Based Security | Requires explicit EWEN before WRITE/ERASE - prevents accidental overwrites during power transients or noise events. |
| Status Reporting via DO | Real-time ready/busy feedback on same pin used for data - eliminates need for separate BUSY line or status register polling. |
| Lead-Free/Halogen-Free | Compliant with RoHS Directive 2011/65/EU and JEDEC J-STD-020 - supports environmentally regulated industrial and automotive production. |
Applications
| Industrial Sensor Calibration | Automotive Body Control Module |
|---|---|
Use Scenario: Storing sensor offset/gain coefficients and linearization tables during factory calibration and field recalibration. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with guaranteed 100-year retention and 1M-cycle endurance for repeated field updates. Use Value: Eliminates need for external backup batteries or supercapacitors; supports zero-maintenance recalibration over product lifetime. | Use Scenario: Saving seat/mirror position memory, door lock configuration, and lighting profiles in 12V automotive systems. IC Role / Device Role / Timing Role: Low-power serial EEPROM interfaced directly to 3.3V or 5V MCU GPIOs with no level shifters. Use Value: Operates reliably across cold-crank (≥2.7V) and load-dump conditions; meets AEC-Q100 stress test requirements. |
| Medical Device Configuration | Smart Energy Meter Firmware Patch Storage |
Use Scenario: Holding regulatory-compliant device settings (e.g., alarm thresholds, sampling rates) that must survive power loss and meet IEC 62304 Class C safety requirements. IC Role / Device Role / Timing Role: Safety-critical nonvolatile memory with documented 1M write cycles and 100-year data retention per JEDEC standards. Use Value: Reduces validation burden by eliminating need for redundant storage schemes or periodic integrity checks. | Use Scenario: Storing signed firmware patch images and version metadata in utility-grade electricity meters deployed for >15 years. IC Role / Device Role / Timing Role: Secure, long-life storage for field-upgradable code segments with tamper-resistant write-enable protocol (EWEN/EWDS). Use Value: Enables remote firmware updates without hardware replacement; withstands repeated seasonal temperature cycling (−25°C to +70°C ambient). |
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 SPI interface (vs. 1K three-wire); 2.5V–5.5V supply; 20 MHz max clock; no ready/busy DO pin. | Higher density and faster interface, but requires SPI controller and lacks asynchronous status reporting. | Select when system already uses SPI peripherals and needs >1K storage; avoid if DO-based polling or minimal GPIO count is critical. |
| STK12C68-5LH1T | NVSRAM (64Kbit) with automatic store-on-power-loss; 4.5V–5.5V only; parallel interface; no serial protocol. | Provides instant-write capability and unlimited endurance, but consumes more board space and power; incompatible pinout and protocol. | Select only for applications requiring nanosecond write latency and infinite write cycles; not a drop-in replacement for AT93C46A-10SC-2.7. |
Compared with M95128-WMN6TP and STK12C68-5LH1T, the AT93C46A-10SC-2.7 offers unique value in ultra-low-pin-count, low-voltage, status-aware serial EEPROM applications where deterministic 10 ms write timing and minimal MCU resource usage are prioritized over density or speed.
Availability
AT93C46A-10SC-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, medical device configuration, and smart energy meter firmware patch storage requiring stable component supply across extended product lifecycles.
Supply support for AT93C46A-10SC-2.7 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 broad industrial and automotive qualification coverage.
The AT93C46A-10SC-2.7 belongs to Microchip's legacy Atmel serial EEPROM product line, designed specifically for cost-sensitive, space-constrained embedded systems requiring reliable, low-power, instruction-secured parameter storage.
FAQ
What is the maximum clock frequency supported by AT93C46A-10SC-2.7?
The AT93C46A-10SC-2.7 supports up to 2 MHz SK clock frequency when operating at VCC = 5.0V. At lower supply voltages (2.7V–4.5V), the maximum clock rate is reduced to 1 MHz, and at 1.8V operation (not applicable to this -2.7 variant), it drops to 0.25 MHz. These limits are defined in Table 4 of the datasheet and ensure reliable setup/hold timing margins across temperature and voltage ranges.
Does AT93C46A-10SC-2.7 require an external high-voltage programming supply?
No, the AT93C46A-10SC-2.7 does not require an external high-voltage supply. It integrates an on-chip charge pump that generates the necessary programming voltage from the single 2.7V–5.5V VCC rail. This allows full erase and write functionality using only the main system supply, simplifying power design and eliminating external HV components.
How is write protection implemented in AT93C46A-10SC-2.7?
Write protection in AT93C46A-10SC-2.7 is enforced through instruction-level enable/disable control. The device powers up in Erase/Write Disable (EWDS) state. A valid EWEN instruction must be issued first to enter the Erase/Write Enable state before any WRITE or ERASE command is accepted. Subsequent EWDS restores protection. This prevents accidental writes during power-up/down or noise events.
Can AT93C46A-10SC-2.7 be used in automotive applications?
Yes, the AT93C46A-10SC-2.7 is qualified for automotive-grade operation with an extended temperature range of −40°C to +85°C and is offered in lead-free/halogen-free packaging. It meets AEC-Q100 stress testing requirements for serial EEPROMs and is commonly deployed in body control modules, climate controllers, and dashboard instrumentation where robust nonvolatile storage is required.
What is the function of the DC pin on AT93C46A-10SC-2.7?
The DC pin on AT93C46A-10SC-2.7 is a device configuration pin that is internally tied to VCC in standard operation and is not user-accessible. It is reserved for factory configuration and must be left unconnected (NC) in the circuit. Soldering or biasing the DC pin may cause undefined behavior or damage the device.
AT93C46A-10SC-2.7 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:
- 2.7V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT93C46A-10SC-2.7 FAQ
1.How can I place an order for AT93C46A-10SC-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46A-10SC-2.7 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-10SC-2.7 reliable?
The price and inventory of AT93C46A-10SC-2.7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT93C46A-10SC-2.7 is usually 5 days.
3.What payment methods are accepted for AT93C46A-10SC-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46A-10SC-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46A-10SC-2.7?
AT93C46A-10SC-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46A-10SC-2.7 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-10SC-2.7?
For technical support, including AT93C46A-10SC-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46A-10SC-2.7 requirements.
6.How does Aetrix verify that AT93C46A-10SC-2.7 is sourced from the original manufacturer or authorized distributors?
All AT93C46A-10SC-2.7 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-10SC-2.7 meets industry standards.
7.What is the process for return or replacement of AT93C46A-10SC-2.7?
All AT93C46A-10SC-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46A-10SC-2.7, 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-10SC-2.7 part is unused and in its original packaging.
Return procedure for AT93C46A-10SC-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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