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Microchip Technology AT93C46R-10SI-1.8
- Part No.:
- AT93C46R-10SI-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C46R-10SI-1.8.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,223
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Product details
Overview
AT93C46R-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, 10 ms max self-timed write cycle, and automotive-grade temperature range (−40°C to +85°C). It is used in embedded system configuration storage, sensor calibration data retention, and industrial control parameter backup.
For engineers reviewing the AT93C46R-10SI-1.8 datasheet, AT93C46R-10SI-1.8 pinout, AT93C46R-10SI-1.8 application, or AT93C46R-10SI-1.8 equivalent, key selection considerations include low-voltage operation down to 1.8V, rotated SOIC pinout (R suffix), internal organization flexibility via ORG pin, and compatibility with legacy 3-wire SPI-like host interfaces requiring CS/SK/DI/DO timing compliance.
Technical Context
The AT93C46R-10SI-1.8 implements a synchronous three-wire serial interface with Chip Select (CS), Serial Clock (SK), and bidirectional Data I/O (DI/DO), supporting READ, WRITE, ERASE, EWEN, EWDS, ERAL, and WRAL instructions. Its instruction decoding relies on start bit "1" followed by op code and address, with dummy bit preceding output data.
Internal organization is selected via ORG pin: tied to VCC for 64 × 16 mode, grounded for 128 × 8 mode; unconnected ORG defaults to x16 only in 2.7V versions - not supported in 1.8V variants like AT93C46R-10SI-1.8. Write enable (EWEN) must precede all programming operations, and Ready/Busy status is reported on DO when CS is asserted post-write initiation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 × 8 or 64 × 16 organization) |
| Supply Voltage Range | 1.8V to 5.5V - enables direct interfacing with 1.8V logic and mixed-voltage systems without level shifters |
| Max Clock Frequency | 2 MHz at VCC = 5V - defines maximum serial transaction throughput for configuration reads/writes |
| Write Cycle Time | 10 ms maximum - determines minimum time between successive write commands; impacts firmware update latency |
| Data Retention | 100 years - ensures long-term reliability of stored calibration or security keys without refresh |
| Endurance | 1 million write cycles - supports frequent field updates in programmable logic controllers or adaptive sensors |
| Operating Temperature | −40°C to +85°C - qualified for industrial and automotive under-hood applications |
Pinout & Package
AT93C46R-10SI-1.8 uses an 8-lead JEDEC SOIC package with rotated pinout (R suffix), differing from standard SOIC orientation to accommodate PCB layout constraints in dense designs. Pin 1 is located at bottom-left corner when viewed top-down with notch left.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must be held low for entire instruction sequence; high state places DO in high-impedance |
| SK | Serial Clock | Input clock synchronizing all data transfers; rising edge samples DI, falling edge outputs DO |
| DI | Data Input | Serial input for instructions, addresses, and write data; latched on SK rising edge |
| DO | Data Output | Serial output for read data and Ready/Busy status; tri-stated when CS is high |
| GND | Ground Reference | Return path for VCC and signal currents; must be low-impedance for noise immunity |
| VCC | Power Supply | 1.8V–5.5V supply; decoupling capacitor required near pin for stable operation during write cycles |
| ORG | Organization Select | Fixed to x16 mode in 1.8V devices; no external connection needed - internal logic enforces 64×16 only |
| DC | Don't Connect | No internal connection; must remain floating or tied to GND/VCC per layout guidelines to avoid noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Three-wire serial interface | Reduces MCU GPIO usage vs. parallel EEPROMs; compatible with generic bit-banged or hardware SPI peripherals |
| User-selectable memory organization | Supports both byte-oriented (128×8) and word-oriented (64×16) access without changing firmware logic |
| Self-timed write cycle | Eliminates need for external write-complete polling delay; simplifies driver implementation |
| 1.8V low-voltage operation | Enables direct integration into battery-powered IoT nodes and ultra-low-power microcontroller systems |
| Automotive-grade qualification | Meets extended temperature and reliability requirements for engine control units and ADAS modules |
Applications
| Industrial PLC Configuration Storage | Automotive Sensor Calibration |
|---|---|
Use Scenario: Storing I/O mapping, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent settings across power cycles; accessed infrequently but requiring guaranteed write integrity. Use Value: 1 million write cycles and 100-year retention ensure decades of reliable operation without recalibration or replacement. | Use Scenario: Retaining temperature-compensated offset/gain coefficients for pressure and oxygen sensors in engine management systems. IC Role / Device Role / Timing Role: Dedicated calibration data repository; written once during manufacturing and read at startup. Use Value: −40°C to +85°C rating and 1.8V compatibility allow placement near sensors in thermally aggressive environments. |
| Medical Device Parameter Backup | Consumer Appliance Settings Memory |
Use Scenario: Preserving user-adjusted therapy profiles and safety limits in portable infusion pumps and diagnostic monitors. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for critical operational parameters; accessed via isolated MCU interface. Use Value: Low standby current (0.1 µA at 1.8V) extends battery life in portable medical equipment between charges. | Use Scenario: Saving user preferences (e.g., cooking modes, timers, display brightness) in smart ovens and washing machines. IC Role / Device Role / Timing Role: General-purpose nonvolatile memory for consumer UI state persistence. Use Value: Rotated SOIC (R) footprint simplifies routing in cost-sensitive white-goods PCBs with tight space constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT93C46D-10SI-1.8 | Same 1K-bit capacity and 1.8V operation, but standard (non-rotated) SOIC pinout | Requires PCB layout revision if replacing AT93C46R-10SI-1.8 due to inverted pin 1 location | Select when board space allows standard SOIC orientation and no rotation constraint exists |
| M95010-WMN6TP | 1K-bit SPI EEPROM, 1.8V–5.5V, but uses 4-wire SPI (including /HOLD and /WP pins); no ORG pin | Lacks organization select; fixed 128×8 mode; requires additional control signals | Choose for new designs needing SPI standard compliance and enhanced write protection features |
Compared with AT93C46R-10SI-1.8, AT93C46D-10SI-1.8 offers identical electrical specs but standard pinout, while M95010-WMN6TP provides SPI-standard interface and hardware write protection at the cost of added pin count and loss of organization flexibility.
Availability
AT93C46R-10SI-1.8 is available at Aetrix Electronics and suitable for industrial PLC configuration storage, automotive sensor calibration, and medical device parameter backup requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AT93C46R-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 is a global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with broad industrial and automotive qualification coverage.
The AT93C46R-10SI-1.8 belongs to Microchip's legacy serial EEPROM product line, designed specifically for low-pin-count, low-power configuration and calibration storage in resource-constrained embedded systems.
FAQ
What does the "R" suffix in AT93C46R-10SI-1.8 indicate?
The "R" denotes rotated pinout in the 8-lead JEDEC SOIC package: pin 1 is positioned at the bottom-left corner instead of the top-left, enabling alternative PCB routing layouts. This mechanical variant maintains full electrical and functional equivalence with standard AT93C46-10SI-1.8 but requires matching footprint in layout. AT93C46R-10SI-1.8 retains identical timing, voltage, and instruction set behavior.
Can the ORG pin on AT93C46R-10SI-1.8 be used to switch between 8-bit and 16-bit organization?
No - the ORG pin functionality is disabled in 1.8V versions like AT93C46R-10SI-1.8. Per datasheet Section "Figure 1. Block Diagram" note, organization selection via ORG is only available on 2.7V devices. AT93C46R-10SI-1.8 operates exclusively in 64 × 16 (1024-bit) mode; the ORG pin has no effect and should be left unconnected. AT93C46R-10SI-1.8 does not support 128 × 8 configuration.
Is AT93C46R-10SI-1.8 suitable for automotive applications?
Yes - AT93C46R-10SI-1.8 is explicitly qualified for automotive-grade operation across −40°C to +85°C and meets lead-free/halogen-free requirements. Its 1 million write endurance and 100-year data retention make it appropriate for storing calibration data in engine control units, body control modules, and ADAS sensors where long-term reliability is mandatory. AT93C46R-10SI-1.8 is listed in the datasheet under "Automotive Grade, Extended Temperature and Lead-Free/Halogen-Free Devices Available."
What is the maximum clock frequency supported by AT93C46R-10SI-1.8 at 1.8V?
At VCC = 1.8V, the maximum SK clock frequency for AT93C46R-10SI-1.8 is 0.25 MHz, as specified in Table 4 (AC Characteristics). This is significantly lower than the 2 MHz maximum at 5V. Designers must adjust host controller clock generation accordingly to meet tSKH/tSKL ≥ 1000 ns and other AC timing limits. AT93C46R-10SI-1.8 performance degrades predictably with supply voltage, and all timing parameters scale per voltage bin.
Does AT93C46R-10SI-1.8 require an external pull-up resistor on the DO pin?
No - AT93C46R-10SI-1.8 features an active push-pull output on DO during valid data transmission and Ready/Busy reporting. When CS is high, DO enters high-impedance state and no pull-up is needed. External pull-ups may cause bus contention or increased standby current. The device drives DO actively low/high per specification (VOL2 = 0.2V, VOH2 = VCC – 0.2V at 1.8V), and AT93C46R-10SI-1.8 is designed for direct connection to CMOS inputs without termination.
AT93C46R-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
AT93C46R-10SI-1.8 FAQ
1.How can I place an order for AT93C46R-10SI-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46R-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 AT93C46R-10SI-1.8 reliable?
The price and inventory of AT93C46R-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 AT93C46R-10SI-1.8 is usually 5 days.
3.What payment methods are accepted for AT93C46R-10SI-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46R-10SI-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46R-10SI-1.8?
AT93C46R-10SI-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46R-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 AT93C46R-10SI-1.8?
For technical support, including AT93C46R-10SI-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46R-10SI-1.8 requirements.
6.How does Aetrix verify that AT93C46R-10SI-1.8 is sourced from the original manufacturer or authorized distributors?
All AT93C46R-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 AT93C46R-10SI-1.8 meets industry standards.
7.What is the process for return or replacement of AT93C46R-10SI-1.8?
All AT93C46R-10SI-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46R-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 AT93C46R-10SI-1.8 part is unused and in its original packaging.
Return procedure for AT93C46R-10SI-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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