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Microchip Technology AT93C46-10TU-1.8
- Part No.:
- AT93C46-10TU-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT93C46-10TU-1.8.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,349
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Product details
Overview
AT93C46-10TU-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 1.8 V to 5.5 V, featuring 2 MHz clock rate at 5 V, 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 for industrial controllers and sensor modules requiring low-voltage nonvolatile memory.
For engineers reviewing the AT93C46-10TU-1.8 datasheet, AT93C46-10TU-1.8 pinout, AT93C46-10TU-1.8 application, or AT93C46-10TU-1.8 equivalent, key selection criteria include 1.8 V minimum supply voltage, TSSOP-8 package compatibility, ORG-pin configurable x8/x16 organization, and Ready/Busy status reporting via DO pin during write cycles.
Technical Context
The AT93C46-10TU-1.8 implements a synchronous three-wire interface (CS/SK/DI/DO) with start-bit–driven instruction decoding and supports seven instructions including READ, WRITE, ERASE, EWEN, EWDS, ERAL, and WRAL. Its internal organization is selected by the ORG pin: high or floating enables 64 × 16 mode; grounded enables 128 × 8 mode.
Write operations require prior EWEN execution and are self-timed up to 10 ms; no separate erase step is needed before write. The DO pin outputs Ready/Busy status when CS is raised during a write cycle - logic '1' indicates completion. Standby current is as low as 0.1 µA at 1.8 V, supporting battery-backed applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 × 8 or 64 × 16 organization) |
| Supply Voltage Range | 1.8 V to 5.5 V - enables direct interfacing with 1.8 V logic and mixed-voltage systems |
| Max Clock Frequency | 2 MHz at VCC = 5 V - determines maximum serial data throughput of ~200 kbps |
| Write Cycle Time | 10 ms maximum - defines minimum time between successive write commands |
| Endurance | 1 million write cycles - ensures long-term reliability in field-updatable firmware storage |
| Data Retention | 100 years - guarantees configuration data integrity over full product lifecycle |
| Operating Temperature | −40°C to +85°C - qualified for industrial and automotive under-hood environments |
Pinout & Package
AT93C46-10TU-1.8 is housed in an 8-lead Thin Shrink Small Outline Package (TSSOP), 3.0 mm × 4.4 mm body, 0.65 mm pitch, lead-free/halogen-free, compliant with JEDEC MO-153.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for serial communication; must be held low for entire instruction sequence |
| SK | Serial Clock | Input clock synchronizing all data transfers; rising edge samples DI, falling edge outputs DO |
| DI | Data Input | Serial input for instructions and write data; accepts start bit + opcode + address + data |
| DO | Data Output | Serial output for read data and Ready/Busy status; high = ready, low = busy during write |
| VCC | Power Supply | Primary supply rail (1.8–5.5 V); powers internal logic and EEPROM array |
| GND | Ground | Reference return path for all signals and power |
| ORG | Organization Select | Configures memory map: tied to VCC → 64 × 16; tied to GND → 128 × 8; floating defaults to x16 |
| DC | Don't Connect | No internal connection; must remain unconnected per datasheet - not usable as NC or tie point |
Key Features
| Feature | Design Value |
|---|---|
| User-selectable memory organization | Supports both byte-oriented (128 × 8) and word-oriented (64 × 16) access without hardware redesign |
| Three-wire serial interface | Reduces MCU GPIO count and PCB routing complexity versus SPI or I²C EEPROMs |
| Self-timed write cycle | Eliminates need for external timing control or polling delay loops in host firmware |
| Ready/Busy status on DO pin | Enables efficient host synchronization without fixed delays or continuous status reads |
| Low standby current (0.1 µA @ 1.8 V) | Extends battery life in always-on sensor nodes and portable diagnostic tools |
Applications
| Industrial PLC Configuration Storage | Automotive Sensor Calibration Data |
|---|---|
Use Scenario: Storing I/O mapping, scaling factors, and alarm thresholds in programmable logic controllers deployed in factory automation cabinets. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent settings across power cycles; accessed infrequently but requiring guaranteed retention. Use Value: Enables field reconfiguration without firmware update; 100-year data retention ensures multi-decade deployment without data loss. |
Use Scenario: Recording factory-set calibration coefficients and fault history logs in engine coolant temperature and pressure sensors. IC Role / Device Role / Timing Role: Dedicated parameter storage element interfaced directly to microcontroller's GPIO pins; updated only during manufacturing or service events. Use Value: Eliminates need for larger flash memory partitioning; −40°C to +85°C rating matches under-hood thermal requirements. |
| Medical Device Setup Parameters | Consumer Appliance User Preferences |
Use Scenario: Saving default operational modes, safety limits, and language selections in portable infusion pumps and diagnostic monitors. IC Role / Device Role / Timing Role: Low-power configuration EEPROM accessed during boot; retains critical safety-critical values even after battery depletion. Use Value: 0.1 µA standby current extends primary battery life; 1.8 V operation supports single-cell Li-ion or coin-cell backup. |
Use Scenario: Preserving user-selected display brightness, timer presets, and cycle options in smart washing machines and HVAC remotes. IC Role / Device Role / Timing Role: Serial configuration memory sharing MCU GPIO resources with buttons and displays; written once per user action. Use Value: TSSOP-8 footprint minimizes board area; 1 million endurance supports >10 years of daily use at 300 writes/year. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT93C46-10SU-1.8 | Same electrical specs and pinout; uses JEDEC SOIC-8 (8S1) instead of TSSOP-8 (8A2) | Preferred where board-level rework or hand-soldering is required; SOIC offers higher mechanical robustness and thermal mass | Select when legacy SOIC footprint compatibility or manual assembly is prioritized over space-constrained layouts |
| M95128-WMN6TP | 128 Kbit SPI EEPROM (16× larger capacity); operates down to 1.8 V but requires 4-wire SPI interface | Suitable for designs needing expanded configuration space or migrating toward standardized SPI peripherals | Choose when future scalability or SPI ecosystem alignment outweighs minimal pin count advantage of three-wire interface |
Compared with AT93C46-10TU-1.8, the AT93C46-10SU-1.8 offers identical functionality in a more serviceable package, while M95128-WMN6TP trades interface simplicity for greater density and SPI compatibility - neither is pin-compatible, but both serve overlapping industrial configuration roles.
Availability
AT93C46-10TU-1.8 is available at Aetrix Electronics and suitable for industrial PLCs, automotive sensor modules, and medical device configuration storage requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for AT93C46-10TU-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 maintains full support for the legacy AT93C family of serial EEPROMs, emphasizing reliability, longevity, and industrial qualification.
The AT93C46 series was designed for cost-sensitive, space-constrained embedded systems needing simple, low-power nonvolatile memory - especially where three-wire interface minimizes MCU resource usage and PCB layer count.
FAQ
What is the function of the ORG pin on the AT93C46-10TU-1.8?
The ORG pin selects internal memory organization: when tied to VCC, AT93C46-10TU-1.8 operates in 64 × 16 mode (16-bit words); when grounded, it uses 128 × 8 mode (8-bit bytes). If left floating, the internal 1 MΩ pull-up defaults to x16 mode. This pin must not be left unterminated in noise-prone environments.
Does the AT93C46-10TU-1.8 support write protection?
Yes - AT93C46-10TU-1.8 implements Erase/Write Disable (EWDS) instruction to lock programming functions. After issuing EWDS, only READ remains active until EWEN is executed again. This prevents accidental overwrites during normal operation or power transients.
Can the AT93C46-10TU-1.8 be used at 1.8 V with full timing compliance?
Yes - AT93C46-10TU-1.8 is fully specified for 1.8 V to 5.5 V operation. At 1.8 V, AC characteristics include min SK low/high time of 1000 ns and max clock frequency of 0.25 MHz, ensuring reliable timing margins in ultra-low-voltage systems.
What is the purpose of the DC pin on the AT93C46-10TU-1.8?
The DC (Don't Connect) pin on AT93C46-10TU-1.8 has no internal connection and must remain unconnected. It is not a no-connect (NC) pin intended for grounding or pulling - any external connection may compromise device reliability or violate JEDEC TSSOP mechanical specifications.
How does the Ready/Busy status work on the AT93C46-10TU-1.8 DO pin?
During a write cycle, raising CS high after tCS ≥ 250 ns causes AT93C46-10TU-1.8 to drive DO: logic '0' means programming is still in progress; logic '1' confirms completion. This allows precise host synchronization without fixed delays - critical for deterministic real-time systems.
AT93C46-10TU-1.8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm 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-TSSOP
AT93C46-10TU-1.8 FAQ
1.How can I place an order for AT93C46-10TU-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46-10TU-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 AT93C46-10TU-1.8 reliable?
The price and inventory of AT93C46-10TU-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 AT93C46-10TU-1.8 is usually 5 days.
3.What payment methods are accepted for AT93C46-10TU-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46-10TU-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46-10TU-1.8?
AT93C46-10TU-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46-10TU-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 AT93C46-10TU-1.8?
For technical support, including AT93C46-10TU-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46-10TU-1.8 requirements.
6.How does Aetrix verify that AT93C46-10TU-1.8 is sourced from the original manufacturer or authorized distributors?
All AT93C46-10TU-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 AT93C46-10TU-1.8 meets industry standards.
7.What is the process for return or replacement of AT93C46-10TU-1.8?
All AT93C46-10TU-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46-10TU-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 AT93C46-10TU-1.8 part is unused and in its original packaging.
Return procedure for AT93C46-10TU-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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