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Microchip Technology AT93C46-10SU-1.8
- Part No.:
- AT93C46-10SU-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C46-10SU-1.8.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,569
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Product details
Overview
AT93C46-10SU-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, self-timed 10 ms max write cycle, and automotive-grade reliability for industrial control and embedded configuration storage.
For engineers reviewing the AT93C46-10SU-1.8 datasheet, AT93C46-10SU-1.8 pinout, AT93C46-10SU-1.8 application, or AT93C46-10SU-1.8 equivalent, key selection criteria include low-voltage operation down to 1.8V, ORG-pin configurable memory width, 1 million write endurance, 100-year data retention, and compatibility with space-constrained TSSOP-8 layouts in automotive and industrial systems.
Technical Context
The AT93C46-10SU-1.8 implements a synchronous three-wire interface (CS/SK/DI/DO) with start-bit–driven instruction decoding, supporting READ, WRITE, ERASE, EWEN, EWDS, ERAL, and WRAL commands. Its internal organization is dynamically selected via the ORG pin: tied to VCC for 64 × 16 mode, grounded for 128 × 8 mode.
Write operations require prior EWEN activation and are self-timed with status reporting via DO pin when CS is raised during tWP; no external erase cycle is needed. The device supports 1.8V–5.5V operation with VIL/VIH thresholds scaled per voltage range and guarantees tSKH/tSKL ≥ 250 ns at 1.8V and ≥1000 ns at 5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 × 8 or 64 × 16 words), enabling compact nonvolatile storage for calibration data or device IDs |
| Supply Voltage Range | 1.8V to 5.5V - supports direct interfacing with 1.8V logic and legacy 3.3V/5V microcontrollers without level shifting |
| Max Clock Frequency | 2 MHz at VCC = 5V; 1 MHz at VCC = 2.7V; 0.25 MHz at VCC = 1.8V - defines maximum serial throughput in system-level timing budgets |
| Write Cycle Time | 10 ms maximum - determines minimum time between successive writes and impacts firmware polling or interrupt latency design |
| Endurance & Retention | 1 million write cycles and 100 years data retention - qualifies for long-life industrial deployments with infrequent but critical updates |
| Operating Temperature | −40°C to +85°C - meets industrial temperature requirements for automotive body control modules and factory automation |
| Package | 8-lead TSSOP (8A2), 3.0 mm × 4.4 mm footprint - enables high-density PCB layout in space-constrained embedded applications |
Pinout & Package
AT93C46-10SU-1.8 is housed in an 8-lead Thin Shrink Small Outline Package (TSSOP, JEDEC MO-153 variation AA), measuring 3.0 mm × 4.4 mm with 0.65 mm lead pitch and gull-wing leads. It features exposed pad-less construction and RoHS-compliant lead-free/halogen-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must be held low for entire instruction sequence; controls DO output impedance state |
| SK | Serial Clock | Input clock synchronizing all data transfers; rising edge samples DI, falling edge outputs DO |
| DI | Data Input | Serial instruction and address/data input; accepts start bit + op code + address + data per command |
| DO | Data Output | Open-drain serial output; provides read data or Ready/Busy status (logic 1 = ready, 0 = busy) |
| VCC | Power Supply | Primary supply rail (1.8V–5.5V); powers internal logic and EEPROM array; decoupling required near pin |
| GND | Ground | Reference return path for all signals and internal circuitry; must be low-impedance connection |
| ORG | Organization Select | Configures memory width: VCC = 64×16, GND = 128×8; not functional on 1.8V-only variants per datasheet note |
| DC | Don't Connect | No internal connection; must remain unconnected and floating; not to be tied to VCC or GND |
Key Features
| Feature | Design Value |
|---|---|
| Three-wire serial interface | Reduces MCU GPIO count and PCB routing complexity versus SPI/I²C; compatible with minimal microcontroller peripherals |
| User-selectable x8/x16 organization | Enables flexible data packing-x16 for word-aligned MCU access, x8 for byte-oriented protocols-without changing hardware |
| Self-timed write cycle with status feedback | Eliminates need for fixed delay loops; DO pin indicates completion, enabling efficient polling or interrupt-driven write handling |
| 1.8V–5.5V wide supply range | Supports direct integration into mixed-voltage systems (e.g., 1.8V FPGA config + 3.3V MCU) without external regulators or translators |
| Automotive-grade reliability | Qualified for −40°C to +85°C operation with 1M endurance and 100-year retention-meets AEC-Q100 stress test expectations |
Applications
| Industrial Sensor Calibration | Automotive Body Control Module |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients and linearization tables for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed during power-up initialization; reads occur once per boot, writes only during calibration or field update. Use Value: Enables plug-and-play sensor replacement with zero manual recalibration; 1.8V operation allows direct connection to low-power sensor ASICs. | Use Scenario: Holding door lock actuator profiles, mirror position presets, and lighting dimming curves in vehicle body control units. IC Role / Device Role / Timing Role: Persistent parameter store updated infrequently during service mode; accessed via microcontroller's GPIO bit-banged serial driver. Use Value: Survives battery disconnect events; 100-year retention ensures lifetime data integrity across vehicle ownership cycles. |
| Medical Device Configuration | Consumer Appliance Settings Storage |
Use Scenario: Saving user-selected therapy parameters (e.g., pressure levels, ramp times) and usage logs in portable respiratory equipment. IC Role / Device Role / Timing Role: Low-power EEPROM interfaced to 1.8V ARM Cortex-M0+ MCU; write operations triggered only after confirmed user input. Use Value: 1 µA standby current at 1.8V extends battery life; 1M endurance supports >10 years of daily settings changes. | Use Scenario: Retaining cooking program preferences, child lock status, and energy usage counters in smart ovens and washing machines. IC Role / Device Role / Timing Role: Serial configuration memory sharing bus with other peripherals; accessed during GUI navigation and power-cycle recovery. Use Value: TSSOP-8 package fits tight control board layouts; halogen-free construction complies with IEC 61000-6-3 EMC and RoHS directives. |
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, 1.8V–5.5V supply | Higher density and faster interface, but requires dedicated SPI peripheral and additional chip select line | Select when migrating to SPI-based platforms or requiring >1Kbit storage without external multiplexing |
| AT25010B-SSHL-T | 3-wire Microwire-compatible interface, 1 Kbit, 2.5V–5.5V supply, SOIC-8 package | Same instruction set and pinout as AT93C46 family but lacks 1.8V support and automotive temp grade | Choose for cost-sensitive commercial designs where 1.8V operation and extended temperature are not required |
Compared with M95128-WMN6TP and AT25010B-SSHL-T, the AT93C46-10SU-1.8 uniquely delivers 1.8V operation, automotive temperature range, and TSSOP-8 packaging in a proven three-wire architecture-making it optimal for space- and voltage-constrained industrial and automotive nodes where pin count and supply flexibility are critical.
Availability
AT93C46-10SU-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, medical device configuration, and consumer appliance settings storage requiring stable component supply across extended temperature and low-voltage operation.
Supply support for AT93C46-10SU-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 leader in microcontrollers, analog components, and secure authentication solutions, delivering reliable, low-power semiconductor products for industrial, automotive, and consumer markets.
The AT93C46-10SU-1.8 belongs to Microchip's legacy serial EEPROM product line, designed specifically for robust, low-pin-count nonvolatile storage in resource-constrained embedded systems requiring guaranteed data integrity over decades.
FAQ
What is the maximum clock frequency supported by AT93C46-10SU-1.8 at 1.8V supply?
The AT93C46-10SU-1.8 supports a maximum SK clock frequency of 0.25 MHz when operated at 1.8V, as specified in Table 4 AC Characteristics. This limit ensures reliable setup/hold timing margins for DI and DO signals under low-voltage conditions. At higher supplies (e.g., 2.7V), the max clock increases to 1 MHz, and at 5V it reaches 2 MHz. Designers must scale firmware bit-bang timing accordingly based on actual VCC.
Can the ORG pin on AT93C46-10SU-1.8 be left unconnected to select x16 organization?
No-the ORG pin functionality is explicitly disabled on 1.8V-only variants like AT93C46-10SU-1.8 per the datasheet note on page 2: "The feature is not available on the 1.8V devices." Leaving ORG unconnected will not configure x16 mode; users must select either x8 or x16 organization via hardwired connection to GND or VCC, or choose the AT93C46A variant if dynamic selection is required.
Does AT93C46-10SU-1.8 require an external pull-up resistor on the DO pin?
Yes-AT93C46-10SU-1.8 features an open-drain DO output that requires an external pull-up resistor (typically 4.7 kΩ to VCC) to ensure valid logic-high levels during read operations and Ready/Busy status reporting. Without this pull-up, DO remains floating when inactive, risking incorrect data sampling or status misinterpretation by the host controller.
Is AT93C46-10SU-1.8 qualified for automotive applications?
Yes-AT93C46-10SU-1.8 is explicitly designated as automotive-grade in the Features section and supports extended temperature operation from −40°C to +85°C. It also meets lead-free/halogen-free requirements and is offered in TSSOP packaging suitable for automotive PCB assembly processes. While not AEC-Q200 certified out-of-box, its specification envelope aligns with common automotive subsystem requirements such as body electronics and infotainment configuration storage.
How does the AT93C46-10SU-1.8 handle write protection during power transitions?
The AT93C46-10SU-1.8 powers up in Erase/Write Disable (EWDS) state, preventing accidental writes during power-on reset. Programming instructions (WRITE, ERASE, etc.) are only accepted after an explicit EWEN command is issued. This state persists until EWDS is re-executed or VCC is removed-ensuring data integrity across brown-out events and uncontrolled power cycling without external hardware lock mechanisms.
AT93C46-10SU-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
AT93C46-10SU-1.8 FAQ
1.How can I place an order for AT93C46-10SU-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46-10SU-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 AT93C46-10SU-1.8 reliable?
The price and inventory of AT93C46-10SU-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 AT93C46-10SU-1.8 is usually 5 days.
3.What payment methods are accepted for AT93C46-10SU-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46-10SU-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46-10SU-1.8?
AT93C46-10SU-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46-10SU-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 AT93C46-10SU-1.8?
For technical support, including AT93C46-10SU-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46-10SU-1.8 requirements.
6.How does Aetrix verify that AT93C46-10SU-1.8 is sourced from the original manufacturer or authorized distributors?
All AT93C46-10SU-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 AT93C46-10SU-1.8 meets industry standards.
7.What is the process for return or replacement of AT93C46-10SU-1.8?
All AT93C46-10SU-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46-10SU-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 AT93C46-10SU-1.8 part is unused and in its original packaging.
Return procedure for AT93C46-10SU-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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