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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Microchip Technology AT93C46A-10TU-2.7-T

Name: AT93C46A-10TU-2.7-T
Brand: Microchip Technology
SKU: AT93C46A-10TU-2.7-T
Price: 2.40 USD
Availability: InStock
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Part No.:: AT93C46A-10TU-2.7-T

Manufacturer:: Microchip Technology

Category:: Memory

Package:: 8-TSSOP (0.173", 4.40mm Width)

Datasheet:: AT93C46A-10TU-2.7-T.pdf

Description:: IC EEPROM 1KBIT 3-WIRE 8TSSOP

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Product details

Overview

AT93C46A-10TU-2.7-T from Microchip Technology (formerly Atmel) is a 1K-bit (64 × 16) three-wire serial EEPROM 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. It is used in embedded system configuration storage, sensor calibration data logging, and power-management parameter backup.

For engineers reviewing the AT93C46A-10TU-2.7-T datasheet, AT93C46A-10TU-2.7-T pinout, AT93C46A-10TU-2.7-T application, or AT93C46A-10TU-2.7-T equivalent, key selection considerations include its TSSOP-8 package, 2.7V–5.5V supply range, three-wire interface timing compliance, and automotive-grade temperature support (−40°C to +85°C).

Technical Context

The AT93C46A-10TU-2.7-T implements a synchronous three-wire serial interface (CS/SK/DI/DO) with instruction-based addressing and status feedback via DO during write/erase operations. Its memory array is organized as 64 words × 16 bits, supporting READ, WRITE, ERASE, EWEN/EWDS, ERAL, and WRAL instructions - all initiated by a start bit followed by op code and address.

It uses internal address decoding and output buffering to deliver data synchronized to SK rising edges, with ready/busy status indicated on DO when CS is asserted post-instruction. The device enters Erase/Write Disable (EWDS) state on power-up and requires explicit EWEN before programming, ensuring data integrity without external hardware protection.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	1024 bits (64 × 16-bit words) - sufficient for small configuration sets or calibration tables in space-constrained designs.
Supply Voltage Range	2.7V to 5.5V - enables direct interfacing with 3.3V and 5V microcontrollers without level-shifting.
Interface Type	Three-wire serial (CS, SK, DI/DO) - reduces PCB routing complexity versus SPI or I²C, with no dedicated chip-select line needed beyond CS.
Max Clock Frequency	2 MHz at VCC = 5V - supports fast read/write throughput in real-time embedded systems.
Write Cycle Time	≤10 ms (self-timed) - eliminates need for external write-complete polling delay; status available via DO pin.
Endurance & Retention	1 million write cycles / 100-year data retention - suitable for field-updatable firmware parameters and long-life industrial deployments.
Operating Temperature	−40°C to +85°C - qualified for industrial and extended-temperature environments without derating.

Pinout & Package

AT93C46A-10TU-2.7-T is housed 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; must be held low for entire instruction cycle; determines device activation window for read/write/erase commands.
SK	Serial Clock	Synchronous edge-triggered clock input; controls timing of data sampling on DI and output on DO; max 2 MHz at 5V.
DI	Data Input	Serial command and address/data input path; accepts start bit, op code, address, and 16-bit write data per instruction.
DO	Data Output	Serial data output for READ; also reports ready/busy status during write/erase when CS is reasserted after tCS ≥250 ns.
GND	Ground Reference	Primary return path for VCC and all I/O signals; must be low-impedance to ensure noise immunity in mixed-signal systems.
VCC	Power Supply	Single-supply input (2.7V–5.5V); powers internal logic, memory array, and I/O buffers; decoupling capacitor required near pin.
NC	No Connect	Internally unconnected pin; must remain floating or tied to GND per layout best practice; no electrical function.
DC	Device Configuration	Factory-programmed pin determining memory organization (x16 mode only for AT93C46A); fixed at manufacture, not user-configurable.

Key Features

Feature	Design Value
Low-Voltage Operation (2.7V–5.5V)	Enables direct integration into 3.3V systems without voltage translation, reducing BOM count and layout area.
Self-Timed Write Cycle	Eliminates need for external timeout circuitry or software delay loops; status feedback via DO simplifies host firmware flow control.
Instruction-Based Security (EWEN/EWDS)	Prevents accidental writes by requiring explicit enable/disable commands - critical for field-deployed devices with remote updates.
Automotive-Grade Qualification	Validated for −40°C to +85°C operation and lead-free/halogen-free construction, meeting AEC-Q200 stress test requirements for industrial reliability.
Three-Wire Interface Simplicity	Reduces MCU GPIO usage vs. SPI (no MISO/MOSI separation) and avoids I²C bus contention issues, ideal for resource-limited microcontrollers.

Applications

Industrial Sensor Calibration	Embedded Power Management
Use Scenario: Storing factory-trimmed offset/gain coefficients and temperature compensation tables in pressure, current, or temperature sensors. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with infrequent writes and frequent reads; accessed during sensor initialization or recalibration routines. Use Value: Enables plug-and-play sensor replacement without manual calibration; retains values across power cycles and thermal cycling.	Use Scenario: Holding dynamic power-state parameters (e.g., undervoltage lockout thresholds, soft-start ramp rates) in DC-DC controllers or PMICs. IC Role / Device Role / Timing Role: Parameter backup memory updated only during firmware updates or field service; read at system boot to configure regulator behavior. Use Value: Allows adaptive power sequencing across varying input conditions while maintaining design flexibility and field upgradeability.
Consumer Device Settings Storage	Automotive Body Control Module
Use Scenario: Saving user preferences (brightness, volume, language) and operational history in smart home hubs or portable audio equipment. IC Role / Device Role / Timing Role: Low-power persistent memory accessed during wake-up or UI initialization; write operations occur only on setting change. Use Value: Delivers instant-on user experience with zero-latency recall of last-used settings, even after battery removal.	Use Scenario: Storing door lock actuation history, mirror position presets, and lighting configuration in vehicle body control units (BCUs). IC Role / Device Role / Timing Role: Ruggedized nonvolatile storage for safety-critical configuration data; accessed during ignition-on sequence and updated during service mode. Use Value: Supports OEM personalization features and diagnostic trace logging while meeting automotive vibration, EMI, and temperature requirements.

Industrial Sensor Calibration

Embedded Power Management

Use Scenario: Storing factory-trimmed offset/gain coefficients and temperature compensation tables in pressure, current, or temperature sensors.

IC Role / Device Role / Timing Role: Nonvolatile configuration storage with infrequent writes and frequent reads; accessed during sensor initialization or recalibration routines.

Use Value: Enables plug-and-play sensor replacement without manual calibration; retains values across power cycles and thermal cycling.

Use Scenario: Holding dynamic power-state parameters (e.g., undervoltage lockout thresholds, soft-start ramp rates) in DC-DC controllers or PMICs.

IC Role / Device Role / Timing Role: Parameter backup memory updated only during firmware updates or field service; read at system boot to configure regulator behavior.

Use Value: Allows adaptive power sequencing across varying input conditions while maintaining design flexibility and field upgradeability.

Consumer Device Settings Storage

Automotive Body Control Module

Use Scenario: Saving user preferences (brightness, volume, language) and operational history in smart home hubs or portable audio equipment.

IC Role / Device Role / Timing Role: Low-power persistent memory accessed during wake-up or UI initialization; write operations occur only on setting change.

Use Value: Delivers instant-on user experience with zero-latency recall of last-used settings, even after battery removal.

Use Scenario: Storing door lock actuation history, mirror position presets, and lighting configuration in vehicle body control units (BCUs).

IC Role / Device Role / Timing Role: Ruggedized nonvolatile storage for safety-critical configuration data; accessed during ignition-on sequence and updated during service mode.

Use Value: Supports OEM personalization features and diagnostic trace logging while meeting automotive vibration, EMI, and temperature requirements.

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 SPI interface (vs. 1K three-wire); 1.8V–5.5V; 20 MHz max clock; SO8/TSSOP8 package.	Higher density and faster interface, but requires SPI-capable MCU and additional GPIO for CS; no ready/busy status pin.	Select when higher capacity or faster throughput is needed and SPI infrastructure is already present.
BR24G02FJ-WE2	2 Kbit I²C interface (vs. 1K three-wire); 1.7V–5.5V; 400 kHz standard / 1 MHz fast-mode; TSSOP8 package.	Two-wire bus sharing capability; no CS pin required; lacks instruction-level erase/write control and DO status reporting.	Select when board-level I²C bus utilization favors shared communication and simpler command protocol suffices.

Compared with M95128-DRMN6TP/K and BR24G02FJ-WE2, the AT93C46A-10TU-2.7-T offers minimal GPIO footprint, deterministic status feedback, and ultra-low standby current (14 µA at 1.8V), making it optimal for deeply embedded, low-pin-count, and battery-sensitive applications where 1K storage is sufficient.

Availability

AT93C46A-10TU-2.7-T is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded power management, and automotive body control module designs requiring stable component supply, long-term lifecycle assurance, and lead-free/halogen-free compliance.

Supply support for AT93C46A-10TU-2.7-T 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 delivering microcontrollers, analog, FPGA, and memory solutions with focus on reliability, security, and ease of design-in.

The AT93C46A-10TU-2.7-T belongs to Microchip's legacy Atmel serial EEPROM product line, designed specifically for cost-sensitive, space-constrained industrial and automotive applications requiring robust nonvolatile storage with minimal interface overhead.

FAQ

What is the operating voltage range of the AT93C46A-10TU-2.7-T?

The AT93C46A-10TU-2.7-T operates from 2.7V to 5.5V, as indicated by the "-2.7" suffix in its ordering code. This range allows direct compatibility with common 3.3V and 5V logic systems without level translation. It does not support 1.8V operation - that variant is designated with "-1.8" (e.g., AT93C46A-10TU-1.8). The device maintains full AC/DC specifications across this voltage window.

Does the AT93C46A-10TU-2.7-T support SPI or I²C communication?

No, the AT93C46A-10TU-2.7-T uses a proprietary three-wire serial interface (CS, SK, DI/DO), not SPI or I²C. It lacks MOSI/MISO lines and does not implement I²C addressing or ACK/NACK protocols. Host communication requires bit-banging or custom peripheral support aligned to its instruction set (READ, WRITE, EWEN, etc.), as defined in the functional description and timing diagrams of the AT93C46A-10TU-2.7-T datasheet.

How is write completion detected on the AT93C46A-10TU-2.7-T?

Write completion is detected using the DO pin as a ready/busy indicator. After initiating a WRITE or ERASE instruction, if CS is brought high for ≥250 ns (tCS) while the internal cycle is active, DO outputs logic "0" (busy); once complete, DO transitions to logic "1" (ready). This eliminates polling delays or fixed timeouts - the AT93C46A-10TU-2.7-T self-times the operation and provides synchronous status feedback.

What package type is used for the AT93C46A-10TU-2.7-T?

The AT93C46A-10TU-2.7-T uses an 8-lead Thin Shrink Small Outline Package (TSSOP), identified by the "TU" suffix and JEDEC MO-153 Variation AA compliant footprint. Its dimensions are 3.00 mm (D) × 4.40 mm (E1) × 1.05 mm (A2) max height, with 0.65 mm lead pitch. This package supports automated SMT assembly and offers better thermal performance than PDIP while occupying less board area than SOIC.

Is the AT93C46A-10TU-2.7-T suitable for automotive applications?

Yes - the AT93C46A-10TU-2.7-T is specified for industrial temperature range (−40°C to +85°C) and manufactured as lead-free/halogen-free, meeting baseline requirements for under-hood and cabin electronics. While not AEC-Q100 qualified as a standalone IC, its qualification level aligns with AEC-Q200 passive stress testing expectations for EEPROMs used in automotive body control modules, seat memory systems, and lighting controllers where extended reliability is mandatory.

AT93C46A-10TU-2.7-T Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 8-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

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-T FAQ

1.How can I place an order for AT93C46A-10TU-2.7-T through Aetrix?

Please submit a Request for Quotation (RFQ) for AT93C46A-10TU-2.7-T 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-T reliable?

The price and inventory of AT93C46A-10TU-2.7-T 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-T is usually 5 days.

3.What payment methods are accepted for AT93C46A-10TU-2.7-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46A-10TU-2.7-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AT93C46A-10TU-2.7-T?

AT93C46A-10TU-2.7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AT93C46A-10TU-2.7-T 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-T?

For technical support, including AT93C46A-10TU-2.7-T 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-T requirements.

6.How does Aetrix verify that AT93C46A-10TU-2.7-T is sourced from the original manufacturer or authorized distributors?

All AT93C46A-10TU-2.7-T 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-T meets industry standards.

7.What is the process for return or replacement of AT93C46A-10TU-2.7-T?

All AT93C46A-10TU-2.7-T units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46A-10TU-2.7-T, 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-T part is unused and in its original packaging.

Return procedure for AT93C46A-10TU-2.7-T:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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