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Microchip Technology AT93C46A-10SI-2.7
- Part No.:
- AT93C46A-10SI-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C46A-10SI-2.7.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,210
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Product details
Overview
AT93C46A-10SI-2.7 from Microchip Technology (formerly Atmel) is a 1K-bit, 64-word × 16-bit serial EEPROM with three-wire interface (CS/SK/DI/DO), rated for 2.7V to 5.5V operation, 1 million write cycles, and 100-year data retention. It supports industrial temperature range (−40°C to +85°C) and is packaged in 8-lead JEDEC SOIC.
For engineers reviewing the AT93C46A-10SI-2.7 datasheet, AT93C46A-10SI-2.7 pinout, AT93C46A-10SI-2.7 application, or AT93C46A-10SI-2.7 equivalent, key selection considerations include VCC voltage range compatibility, self-timed 10 ms max write cycle, standby current at 2.7V (14–20 µA), DO ready/busy status reporting, and instruction-set constraints for ERAL/WRAL validity only at ≥4.5V.
Technical Context
The AT93C46A-10SI-2.7 implements a synchronous three-wire serial interface with Chip Select (CS) activation, serial clock (SK) up to 2 MHz at 5V, and bidirectional data flow via DI (input) and DO (output). It decodes seven instructions-including READ, WRITE, ERASE, EWEN, EWDS, ERAL, and WRAL-each initiated by a rising CS edge and a start bit "1" followed by op code and address.
Memory access is organized as 64 words of 16 bits each, with no separate erase required before write. The device enters Erase/Write Disable (EWDS) state on power-up and requires explicit EWEN to enable programming; DO outputs ready/busy status when CS is asserted during self-timed tWP (0.1–10 ms), with logic "1" indicating completion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (64 × 16-bit words) |
| VCC Range | 2.7V to 5.5V - enables direct integration into 3.3V and 5V systems without level-shifting |
| Interface | Three-wire serial (CS/SK/DI/DO) - reduces PCB routing complexity vs. SPI/I²C |
| Max Clock Rate | 2 MHz at VCC = 5V - supports fast read/write throughput in timing-critical host systems |
| Write Cycle Time | ≤10 ms (self-timed) - eliminates need for external timing control or polling overhead |
| Endurance | 1 million write cycles - suitable for firmware parameter logging or calibration storage |
| Data Retention | 100 years at 25°C - ensures long-term reliability in unattended or maintenance-free deployments |
Pinout & Package
AT93C46A-10SI-2.7 is supplied in an 8-lead JEDEC SOIC package (package code 8S1), 0.150" wide body, surface-mount compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable: device responds only when CS is low; high state places DO in high-impedance mode |
| SK | Serial Clock | Synchronizes all data transfers; rising edge latches DI, falling edge clocks DO |
| DI | Serial Data Input | Receives instruction start bit, op code, address, and write data; sampled on SK rising edge |
| DO | Serial Data Output | Outputs read data (with leading dummy "0") or ready/busy status during write/erase |
| GND | Ground Reference | Return path for VCC and all I/O signals; must be low-impedance for noise immunity |
| VCC | Power Supply | Single supply input (2.7–5.5V); powers internal logic, memory array, and output buffer |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | Functional at 2.7V min - supports battery-backed or energy-constrained embedded systems |
| Self-timed write cycle | No external wait-state logic needed - simplifies host firmware and reduces CPU overhead |
| Ready/busy status via DO | Eliminates fixed-delay polling - enables efficient host synchronization during write/erase |
| Industrial temperature grade | Rated −40°C to +85°C - validated for use in automotive ECUs, industrial controllers, and outdoor equipment |
| Lead-free/halogen-free packaging | Complies with RoHS Directive 2011/65/EU - meets environmental compliance requirements for global manufacturing |
Applications
| Industrial Sensor Calibration | Automotive Body Control Module |
|---|---|
Use Scenario: Storing sensor offset/gain coefficients and linearization tables during factory calibration and field updates. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed infrequently but requiring guaranteed data integrity over decades. Use Value: 100-year retention and 1M endurance ensure calibration data survives full product lifecycle without degradation or refresh. | Use Scenario: Holding door lock actuator settings, mirror position presets, and lighting configuration in vehicle body electronics. IC Role / Device Role / Timing Role: Serial EEPROM interfaced to 8/16-bit microcontrollers via minimal GPIOs for secure, low-pin-count NVM expansion. Use Value: Three-wire interface and 2.7V operation allow direct connection to 3.3V MCU I/O without level shifters, reducing BOM cost and board space. |
| Medical Device Parameter Storage | Smart Energy Meter Firmware Settings |
Use Scenario: Saving user-defined therapy parameters, usage logs, and safety thresholds in portable diagnostic equipment. IC Role / Device Role / Timing Role: Tamper-resistant, low-power NVM used during power-down to preserve critical operational state. Use Value: Standby current of 14–20 µA at 2.7V extends battery life in battery-powered medical devices between charges or replacements. | Use Scenario: Storing tariff schedules, metering constants, and communication credentials in utility-grade electricity meters. IC Role / Device Role / Timing Role: Secure, long-life memory for regulatory-compliant configuration data subject to periodic remote updates. Use Value: Validated 100-year retention and AEC-Q200-aligned industrial qualification ensure data persistence across 20+ year meter deployments. |
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 | 4-wire SPI interface, 128 Kbit capacity, 5 MHz max clock, 1.8–5.5V supply | Higher density and faster interface, but requires dedicated SPI peripheral and additional chip select line | Select when system already uses SPI peripherals and needs >1Kbit storage; not pin-compatible |
| 25AA010A-I/P | 3-wire UNI/O® interface (single I/O pin), 1 Kbit, 1.8–5.5V, 100 kHz max clock | Ultra-low pin count (2-pin interface), but significantly slower write/read and no DO ready/busy reporting | Select for extreme pin-constrained designs where timing tolerance allows 10× slower interface |
Compared with M95128-WMN6TP and 25AA010A-I/P, the AT93C46A-10SI-2.7 offers balanced trade-offs: three-wire simplicity like the UNI/O part but with DO status feedback and 2 MHz speed, while avoiding SPI hardware dependency and higher pin count of the M95128.
Availability
AT93C46A-10SI-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, medical device parameter storage, smart energy meter firmware settings, and embedded system configuration requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AT93C46A-10SI-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, FPGA, and memory solutions, with a focus on reliability, longevity, and embedded system integration.
The AT93C46A-10SI-2.7 belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-pin-count, industrial-grade nonvolatile storage in resource-constrained microcontroller systems.
FAQ
What is the maximum clock frequency supported by AT93C46A-10SI-2.7 at 3.3V operation?
The AT93C46A-10SI-2.7 supports up to 1 MHz SK clock frequency when operated at 2.7V ≤ VCC ≤ 5.5V, per Table 4 AC Characteristics. At 3.3V, this remains the guaranteed maximum; exceeding it risks timing violations and data corruption during read/write operations. The 2 MHz rating applies only at VCC = 5.0V.
Does AT93C46A-10SI-2.7 require a separate erase command before writing data?
No, the AT93C46A-10SI-2.7 does not require a separate erase command before writing. Its write cycle is self-timed and automatically erases the target location prior to programming. However, an Erase/Write Enable (EWEN) instruction must be issued first to exit the default Erase/Write Disable (EWDS) state after power-up.
Can AT93C46A-10SI-2.7 be used in automotive applications requiring AEC-Q200 qualification?
The AT93C46A-10SI-2.7 is specified for industrial temperature range (−40°C to +85°C) and labeled "Automotive Grade" in its features, but it is not formally AEC-Q200 qualified. For AEC-Q200-compliant designs, Microchip offers the AT93C46D-10SI-2.7 variant, which undergoes additional stress testing and screening per the AEC standard.
What is the function of the NC pin in the 8-lead SOIC package of AT93C46A-10SI-2.7?
The NC (No Connect) pin in the AT93C46A-10SI-2.7's 8-lead SOIC package (Pin 6) is internally unconnected and must remain floating or tied to GND/VCC only if required for mechanical stability. It serves no electrical function and should not be used for signal routing, grounding, or decoupling, as doing so may compromise device reliability or violate layout guidelines.
How does the DO pin indicate ready/busy status during a write cycle in AT93C46A-10SI-2.7?
During a write cycle, if CS is held low for ≥250 ns (tCS) and then brought high, the DO pin outputs ready/busy status: logic "0" indicates programming is still in progress, and logic "1" confirms completion. This status is valid only while CS is high immediately after the write initiation - it cannot be read after the self-timed tWP cycle ends.
AT93C46A-10SI-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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT93C46A-10SI-2.7 FAQ
1.How can I place an order for AT93C46A-10SI-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46A-10SI-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-10SI-2.7 reliable?
The price and inventory of AT93C46A-10SI-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-10SI-2.7 is usually 5 days.
3.What payment methods are accepted for AT93C46A-10SI-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46A-10SI-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46A-10SI-2.7?
AT93C46A-10SI-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46A-10SI-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-10SI-2.7?
For technical support, including AT93C46A-10SI-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46A-10SI-2.7 requirements.
6.How does Aetrix verify that AT93C46A-10SI-2.7 is sourced from the original manufacturer or authorized distributors?
All AT93C46A-10SI-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-10SI-2.7 meets industry standards.
7.What is the process for return or replacement of AT93C46A-10SI-2.7?
All AT93C46A-10SI-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46A-10SI-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-10SI-2.7 part is unused and in its original packaging.
Return procedure for AT93C46A-10SI-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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