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Microchip Technology AT93C46R-10SC-1.8
- Part No.:
- AT93C46R-10SC-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C46R-10SC-1.8.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,898
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Product details
Overview
AT93C46R-10SC-1.8 from Microchip Technology (formerly Atmel) is a 1K-bit 3-wire serial EEPROM with 1.8V to 5.5V supply voltage range, user-selectable 128 × 8 or 64 × 16 organization via ORG pin, and self-timed write cycle ≤10 ms. It delivers high reliability with 1 million write cycles and 100-year data retention, and is used in embedded system configuration storage where ultra-low standby current (0.1 µA at 1.8V) and industrial temperature support are required.
For engineers reviewing the AT93C46R-10SC-1.8 datasheet, AT93C46R-10SC-1.8 pinout, AT93C46R-10SC-1.8 application, or AT93C46R-10SC-1.8 equivalent, key selection criteria include 1.8V operation capability, rotated SOIC pinout (R suffix), 8-pin JEDEC SOIC package, 250 kHz max clock rate at 1.8V, and compatibility with legacy 3-wire microcontroller interfaces requiring minimal I/O resources.
Technical Context
The AT93C46R-10SC-1.8 implements a synchronous 3-wire serial interface (CS, SK, DI/DO) with instruction-based command set including READ, WRITE, ERASE, EWEN, and EWDS. Its internal logic decodes 7-bit addresses for 128-word (x8) or 64-word (x16) memory maps, with ORG pin determining organization - though this feature is disabled on 1.8V variants per datasheet note.
Write operations are self-timed with tWP ≤10 ms and require prior EWEN enable; DO pin provides READY/BUSY status when CS is asserted post-write. The device supports industrial temperature range (−40°C to +85°C), exhibits 5 pF input/output capacitance, and maintains functional read/write integrity down to 1.8V with VIL/VIH thresholds scaled to VCC × 0.3 / VCC × 0.7.
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 |
| Max Clock Frequency | 250 kHz at 1.8V - sets minimum SK period to 4000 ns for timing compliance |
| Write Cycle Time | ≤10 ms - defines worst-case blocking time for host firmware during nonvolatile writes |
| Standby Current | 0.1 µA at 1.8V - critical for battery-powered devices requiring multi-year shelf life |
| Data Retention | 100 years - ensures long-term configuration persistence without refresh |
| Endurance | 1 million write cycles - supports frequent calibration or logging updates over product lifetime |
Pinout & Package
AT93C46R-10SC-1.8 uses an 8-lead JEDEC SOIC package (8S1), 0.150" wide, with rotated pinout (R suffix) as confirmed in Pin Configurations section: Pin 1 = DC, Pin 2 = VCC, Pin 3 = CS, Pin 4 = SK, Pin 5 = ORG, Pin 6 = GND, Pin 7 = DO, Pin 8 = DI.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DC | Don't Connect | No internal connection; must be left floating or tied to no net - not usable as NC or VSS |
| VCC | Power Supply | Primary supply input; accepts 1.8V–5.5V; bypass capacitor required near pin for noise immunity |
| CS | Chip Select | Active-low enable; initiates instruction decode on rising edge; controls DO tri-state behavior |
| SK | Serial Clock | Synchronous edge-triggered clock; all data transfers aligned to rising SK edges |
| ORG | Organization Select | Fixed x16 mode on 1.8V parts per datasheet note - pin must be tied to VCC or GND per design, but functionally inactive |
| GND | Ground Reference | Return path for VCC and signal currents; requires low-impedance PCB plane connection |
| DO | Data Output | Tri-state serial output; outputs READ data or READY/BUSY status; high-impedance when CS high |
| DI | Data Input | Serial instruction/address/data input; sampled on rising SK edge; requires clean signal integrity |
Key Features
| Feature | Design Value |
|---|---|
| 1.8V Operation Support | Guaranteed functionality and AC timing compliance down to 1.8V supply, enabling integration into ultra-low-power SoC subsystems |
| Rotated SOIC Pinout (R) | Reordered pin mapping (DC/VCC/CS/SK/ORG/GND/DO/DI) simplifies PCB layout in dense designs by relocating VCC and GND to adjacent pins |
| User-Selectable Memory Organization | Hardware-configurable 128×8 or 64×16 word structure via ORG pin - though fixed to x16 on 1.8V variants per datasheet specification |
| Self-Timed Write Cycle | No external timing control needed; host polls DO pin for READY/BUSY status after initiating WRITE, eliminating need for fixed delay loops |
| Industrial Temperature Range | Specified operation from −40°C to +85°C ensures reliability in automotive body controllers, industrial sensors, and outdoor equipment |
Applications
| Printer Firmware Storage | Smart Meter Calibration Data |
|---|---|
Use Scenario: Storing printer model-specific font tables, page count, and consumables usage history across power cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration register providing persistent parameter storage accessible via microcontroller's GPIO bit-banged 3-wire interface. Use Value: Enables field-upgradable firmware features without requiring higher-cost SPI Flash; 0.1 µA standby current extends battery backup life in offline printers. |
Use Scenario: Retaining meter calibration coefficients, tariff schedules, and tamper-event logs in utility-grade electricity meters. IC Role / Device Role / Timing Role: Secure, long-life data logger memory accessed during boot and periodic measurement cycles using deterministic 3-wire protocol. Use Value: Meets IEC 62056 requirements for 100-year data retention and 1M write endurance, ensuring regulatory compliance over full product lifecycle. |
| Automotive Body Control Module | IoT Edge Sensor Node |
Use Scenario: Saving seat/mirror position presets, door lock configuration, and error code history in 12V automotive systems with local 3.3V/1.8V regulation. IC Role / Device Role / Timing Role: Low-voltage EEPROM interfaced to 1.8V MCU I/O, storing user preferences and diagnostic snapshots during ignition-off periods. Use Value: 1.8V operation eliminates level-shifting components; industrial temp rating ensures functionality under hood temperature extremes. |
Use Scenario: Holding sensor calibration offsets, network credentials, and firmware update flags in battery-powered environmental monitors deployed for >5 years. IC Role / Device Role / Timing Role: Ultra-low-power nonvolatile memory co-located with ARM Cortex-M0+ MCU, accessed only during wake-up events to minimize energy draw. Use Value: 0.1 µA standby current at 1.8V directly translates to multi-year battery life; 100-year retention avoids field recalibration campaigns. |
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-Mbit SPI interface, 2.5–5.5V supply, 20 MHz clock, WLCSP package | Higher density and faster interface, but requires SPI controller and lacks 1.8V support | Select when migrating to SPI infrastructure and >1K memory is needed; not drop-in compatible due to protocol and voltage mismatch |
| BR24G01FJ-3GE2 | I²C interface, 1.7–5.5V supply, 400 kHz clock, 8-lead TSSOP, 1M endurance | Same voltage range and endurance, but uses I²C bus - incompatible with 3-wire host hardware | Choose for new designs with I²C availability and preference for industry-standard two-wire interface; requires firmware rewrite |
Compared with AT93C46R-10SC-1.8, M95128-WMN6TP offers greater capacity and speed but mandates SPI hardware and excludes 1.8V operation, while BR24G01FJ-3GE2 matches voltage and endurance but replaces the 3-wire protocol with I²C - making both alternatives unsuitable for pin- or firmware-compatible replacement without redesign.
Availability
AT93C46R-10SC-1.8 is available at Aetrix Electronics and suitable for printer firmware storage, smart meter calibration data, automotive body control modules, and IoT edge sensor nodes requiring stable component supply across extended temperature ranges and ultra-low power budgets.
Supply support for AT93C46R-10SC-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 continues to manufacture, qualify, and support the AT93C series of serial EEPROMs with full backward compatibility and long-term product assurance.
The AT93C46R-10SC-1.8 belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, space-constrained embedded systems needing reliable, low-voltage, 3-wire nonvolatile storage with minimal external components.
FAQ
What is the function of the DC pin on the AT93C46R-10SC-1.8?
The DC (Don't Connect) pin on the AT93C46R-10SC-1.8 has no internal connection and must remain unconnected on the PCB. It is not a no-connect (NC) pin intended for grounding or pulling; leaving it floating is mandatory per datasheet guidance to avoid unintended electrical coupling or package stress effects that could impact reliability.
Does the ORG pin affect memory organization on the AT93C46R-10SC-1.8?
No - the ORG pin does not select memory organization on the AT93C46R-10SC-1.8. As explicitly stated in the datasheet Absolute Maximum Ratings section, "This feature is not available on 1.8V devices." The AT93C46R-10SC-1.8 operates exclusively in 64 × 16 (x16) mode regardless of ORG pin state, and the pin must still be externally tied to VCC or GND per layout guidelines.
What is the maximum clock frequency supported by the AT93C46R-10SC-1.8 at 1.8V?
The AT93C46R-10SC-1.8 supports a maximum clock frequency of 250 kHz at 1.8V, corresponding to a minimum SK period of 4000 ns. This value is specified in the AC Characteristics table under fSK for "1.8V ≤ VCC ≤ 5.5V" condition and governs timing margins for setup/hold and output delay parameters like tDIS, tDIH, and tPD.
How does the AT93C46R-10SC-1.8 indicate write completion status?
The AT93C46R-10SC-1.8 indicates write completion status via the DO pin: after initiating a WRITE instruction, if CS is driven high for ≥250 ns (tCS), DO outputs logic '1' when ready and logic '0' while busy. This READY/BUSY polling mechanism eliminates fixed delays and allows host firmware to proceed immediately upon confirmation - a core feature of the self-timed write architecture.
Is the AT93C46R-10SC-1.8 qualified for automotive applications?
The AT93C46R-10SC-1.8 is rated for industrial temperature range (−40°C to +85°C) and meets AEC-Q200 stress test requirements for passive components when sourced through Microchip's qualified automotive distribution channels. However, it is not officially AEC-Q100 qualified as an integrated circuit; designers targeting automotive safety-critical domains should verify qualification status with Microchip's latest automotive product documentation for AT93C46R-10SC-1.8.
AT93C46R-10SC-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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT93C46R-10SC-1.8 FAQ
1.How can I place an order for AT93C46R-10SC-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46R-10SC-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-10SC-1.8 reliable?
The price and inventory of AT93C46R-10SC-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-10SC-1.8 is usually 5 days.
3.What payment methods are accepted for AT93C46R-10SC-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46R-10SC-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46R-10SC-1.8?
AT93C46R-10SC-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46R-10SC-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-10SC-1.8?
For technical support, including AT93C46R-10SC-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46R-10SC-1.8 requirements.
6.How does Aetrix verify that AT93C46R-10SC-1.8 is sourced from the original manufacturer or authorized distributors?
All AT93C46R-10SC-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-10SC-1.8 meets industry standards.
7.What is the process for return or replacement of AT93C46R-10SC-1.8?
All AT93C46R-10SC-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46R-10SC-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-10SC-1.8 part is unused and in its original packaging.
Return procedure for AT93C46R-10SC-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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