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Microchip Technology AT93C46A-10TU-2.7
- Part No.:
- AT93C46A-10TU-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT93C46A-10TU-2.7.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,942
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Product details
Overview
AT93C46A-10TU-2.7 from Microchip Technology (formerly Atmel) is a 1K-bit, 64 × 16 organization serial EEPROM with three-wire interface, optimized for low-voltage industrial applications. It operates from 2.7V to 5.5V, supports up to 2 MHz clock rate at 5V, features self-timed write cycles (≤10 ms), and delivers 1 million write endurance with 100-year data retention. Used in microcontroller configuration storage, sensor calibration memory, and power management settings.
For engineers reviewing the AT93C46A-10TU-2.7 datasheet, AT93C46A-10TU-2.7 pinout, AT93C46A-10TU-2.7 application, or AT93C46A-10TU-2.7 equivalent, this page provides verified electrical specifications, TSSOP-8 package details, functional instruction set mapping, timing-critical AC parameters, and validated alternative parts for industrial embedded design continuity.
Technical Context
The AT93C46A-10TU-2.7 implements a synchronous three-wire serial interface (CS/SK/DI/DO) with instruction-based command decoding - including READ, WRITE, ERASE, EWEN, EWDS, ERAL, and WRAL - all initiated by a rising CS edge and start bit. Memory access is nonvolatile and byte-addressable within its 64-word × 16-bit array, with no separate erase cycle required before write.
It features dual-voltage support (2.7–5.5V operation), programmable logic-level thresholds (VIL/VIH dependent on VCC range), and status feedback via DO pin during write/erase operations. The device enters standby mode when CS is low, drawing as little as 14 µA at 1.8V, and maintains full functionality across −40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (64 words × 16 bits); enables compact storage of calibration coefficients or boot configuration flags. |
| Supply Voltage Range | 2.7V to 5.5V; compatible with 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 Frequency | 2 MHz at VCC = 5V; supports fast read/write in time-critical firmware updates. |
| Write Cycle Time | ≤10 ms (self-timed); eliminates need for external delay timing in host firmware. |
| Endurance & Retention | 1 million write cycles / 100-year data retention; suitable for field-deployed devices requiring long-term reliability. |
| Operating Temperature | −40°C to +85°C; qualified for industrial-grade environmental stress. |
Pinout & Package
AT93C46A-10TU-2.7 is packaged in an 8-lead Thin Shrink Small Outline Package (TSSOP), 4.4 mm body width, lead-free/halogen-free, compliant with JEDEC MO-153 variation AA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; initiates instruction decoding on rising edge and gates all serial communication. |
| SK | Serial Clock | Synchronizes data input (DI) and output (DO); max 2 MHz at 5V; defines timing windows per Table 4. |
| DI | Data Input | Receives instruction opcodes, addresses, and 16-bit write data; sampled on SK falling edge. |
| DO | Data Output | Outputs 16-bit read data (with leading dummy "0") and ready/busy status during programming. |
| GND | Ground Reference | Primary return path for VCC and I/O signals; must be low-impedance for noise immunity. |
| VCC | Power Supply | 2.7–5.5V supply; powers internal logic and memory array; decoupling capacitor required near pin. |
| NC | No Connect | Pin 7 is unconnected internally; must remain floating or tied to GND per layout guidelines. |
| DC | Device Configuration | Pin 6 (DC) is unused in AT93C46A-10TU-2.7; not bonded; leave unconnected. |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | 2.7V–5.5V supply range enables direct integration into 3.3V microcontroller subsystems without regulators. |
| Self-Timed Write Cycle | Eliminates host-side timing loops; DO pin indicates completion, simplifying firmware implementation. |
| Instruction-Based Security | EWEN/EWDS commands enforce explicit write-enable/disable states, preventing accidental overwrites. |
| Ready/Busy Status Feedback | DO pin outputs logic "0" (busy) or "1" (ready) when CS goes high mid-cycle, enabling real-time status polling. |
| Automotive-Grade Qualification | Qualified for extended temperature (−40°C to +85°C) and halogen-free/lead-free compliance per JESD22-A108. |
Applications
| Industrial Sensor Calibration | Microcontroller Boot Configuration |
|---|---|
|
Use Scenario: Storing factory-trimmed offset/gain values for analog sensor front-ends in PLC modules. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during power-up initialization; read-only during runtime. Use Value: Enables plug-and-play sensor replacement without reprogramming; retains accuracy across 100-year lifespan. |
Use Scenario: Holding bootloader configuration flags (e.g., UART baud rate, flash boot address, watchdog timeout). IC Role / Device Role / Timing Role: Early-boot serial memory accessed before RAM initialization; supports fail-safe recovery paths. Use Value: Allows field-upgradable boot logic without modifying main MCU firmware; survives 1M+ reboots. |
| Power Management Unit Settings | Consumer Appliance UI State Memory |
|
Use Scenario: Saving user-adjusted voltage/current limits and thermal trip points in DC-DC controller modules. IC Role / Device Role / Timing Role: Write-once-per-session storage updated only after validated safety checks; read at startup. Use Value: Ensures persistent safety-critical settings survive brownouts; 2.7V operation supports backup battery writes. |
Use Scenario: Retaining last-used display brightness, language, and timer presets in smart kitchen appliances. IC Role / Device Role / Timing Role: Low-power background storage updated infrequently; accessed via GPIO-driven serial interface. Use Value: Delivers seamless user experience across power cycles; 14 µA standby current extends battery life in cordless models. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95128-DRMN6TP/K | 128 Kbit (16K × 8), SPI interface, 5V-only (4.5–5.5V), 5 ms write cycle, SO8 package. | Higher density but incompatible 3-wire protocol; requires SPI-capable host and layout change. | Select if migrating to SPI infrastructure and needing >1K storage; not drop-in for AT93C46A-10TU-2.7. |
| BR24G02FJ-WE2 | 2 Kbit (256 × 8), I²C interface, 1.7–5.5V, 5 ms write cycle, TSSOP8 package, same footprint. | I²C bus sharing capability vs. dedicated 3-wire lines; lacks ERAL/WRAL instructions and status feedback. | Choose for multi-device I²C buses where pin count is constrained; verify host supports ACK polling instead of DO status. |
Compared with AT93C46A-10TU-2.7, M95128-DRMN6TP/K offers higher capacity but mandates SPI redesign, while BR24G02FJ-WE2 matches TSSOP8 mechanical fit and voltage range but replaces instruction-based status reporting with I²C ACK timing - impacting firmware portability and real-time write monitoring.
Availability
AT93C46A-10TU-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, microcontroller boot configuration, and power management unit settings requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AT93C46A-10TU-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 acquired Atmel in 2016 and maintains full support for legacy Atmel EEPROMs, providing datasheets, application notes, and long-term manufacturing commitment.
The AT93C46A-10TU-2.7 belongs to Microchip's legacy serial EEPROM family designed for space-constrained, low-power industrial systems requiring robust nonvolatile storage with minimal interface overhead.
FAQ
What is the operating voltage range for AT93C46A-10TU-2.7?
The AT93C46A-10TU-2.7 operates from 2.7V to 5.5V, supporting both 3.3V and 5V logic domains without level shifters. This range is explicitly defined in Table 3 (VCC2 parameter) and confirmed in the Ordering Information section for the "−2.7" suffix. It draws ≤20 µA standby current at 2.7V, making it suitable for battery-backed applications.
Does AT93C46A-10TU-2.7 support write protection?
Yes, AT93C46A-10TU-2.7 implements hardware-assisted write protection via EWEN (Erase/Write Enable) and EWDS (Erase/Write Disable) instructions. Programming is disabled by default at power-up and requires explicit EWEN execution. EWDS must be issued after writes to prevent accidental modification - a feature critical for field-deployed firmware configurations stored in AT93C46A-10TU-2.7.
What package type is used for AT93C46A-10TU-2.7?
AT93C46A-10TU-2.7 uses an 8-lead TSSOP (Thin Shrink Small Outline Package), identified by "TU" in the part number and documented as "8A2" in the Packaging Information section. Its dimensions (3.00 mm width, 4.4 mm body length) comply with JEDEC MO-153, Variation AA, and it is lead-free/halogen-free per RoHS.
How does the AT93C46A-10TU-2.7 indicate write completion?
During a write cycle, AT93C46A-10TU-2.7 outputs ready/busy status on the DO pin: a logic "0" means busy, and "1" means ready. This occurs only if CS is brought high after ≥250 ns (tCS) from the start of the write - a timing requirement specified in Table 4 and Functional Description. Host firmware can poll DO instead of using fixed delays, improving system responsiveness.
Is AT93C46A-10TU-2.7 compatible with 1.8V systems?
No - AT93C46A-10TU-2.7 is the 2.7V–5.5V version. For 1.8V operation, Microchip offers AT93C46A-10TU-1.8 (same TSSOP package, "−1.8" suffix). The "−2.7" designation in AT93C46A-10TU-2.7 explicitly restricts its minimum VCC to 2.7V, and VIH/VIL thresholds are calibrated for that range per Table 3.
AT93C46A-10TU-2.7 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:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
AT93C46A-10TU-2.7 FAQ
1.How can I place an order for AT93C46A-10TU-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46A-10TU-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-10TU-2.7 reliable?
The price and inventory of AT93C46A-10TU-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-10TU-2.7 is usually 5 days.
3.What payment methods are accepted for AT93C46A-10TU-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46A-10TU-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46A-10TU-2.7?
AT93C46A-10TU-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46A-10TU-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-10TU-2.7?
For technical support, including AT93C46A-10TU-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46A-10TU-2.7 requirements.
6.How does Aetrix verify that AT93C46A-10TU-2.7 is sourced from the original manufacturer or authorized distributors?
All AT93C46A-10TU-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-10TU-2.7 meets industry standards.
7.What is the process for return or replacement of AT93C46A-10TU-2.7?
All AT93C46A-10TU-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46A-10TU-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-10TU-2.7 part is unused and in its original packaging.
Return procedure for AT93C46A-10TU-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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