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

Microchip Technology AT93C46-10TU-1.8-T

Name: AT93C46-10TU-1.8-T
Brand: Microchip Technology
SKU: AT93C46-10TU-1.8-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AT93C46-10TU-1.8-T

Manufacturer:: Microchip Technology

Category:: Memory

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

Datasheet:: AT93C46-10TU-1.8-T.pdf

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

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Product details

Overview

AT93C46-10TU-1.8-T 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 reliability for industrial control and embedded configuration storage.

For engineers reviewing the AT93C46-10TU-1.8-T datasheet, AT93C46-10TU-1.8-T pinout, AT93C46-10TU-1.8-T application, or AT93C46-10TU-1.8-T equivalent, key selection criteria include low-voltage operation down to 1.8 V, TSSOP-8 packaging, 100-year data retention, 1 million write cycles, and compatibility with legacy 3-wire SPI-like host interfaces requiring CS/SK/DI/DO signaling.

Technical Context

The AT93C46-10TU-1.8-T implements a synchronous three-wire serial interface (CS, SK, DI, DO) with start-bit–driven instruction decoding and supports dual memory organizations selected via the ORG pin-64 × 16 when tied to VCC, 128 × 8 when grounded. It requires an explicit EWEN instruction before any erase or write operation.

Its self-timed write cycle eliminates external timing control, and Ready/Busy status is reported on the DO pin when CS is asserted during programming. The device operates across −40°C to +85°C and meets automotive-grade reliability standards including 100-year data retention and 1 million endurance cycles.

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 without level shifters
Max Clock Frequency	2 MHz at VCC = 5 V - defines maximum serial throughput of ~200 kbit/s in 8-bit mode
Write Cycle Time	10 ms max - determines minimum time between successive write commands; no external wait-state logic required
Data Retention	100 years - ensures long-term firmware or calibration data integrity in unpowered storage
Endurance	1 million write cycles - supports frequent field updates in telemetry or configuration logging applications
Operating Temperature	−40°C to +85°C - qualified for industrial and automotive under-hood environments

Pinout & Package

AT93C46-10TU-1.8-T 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, with exposed pad not electrically connected.

Pin/Terminal	Circuit Role	Design Meaning
CS	Chip Select	Active-low enable signal; must be held low for entire instruction sequence; initiates communication on rising edge
SK	Serial Clock	Input clock synchronizing all data transfers; supports up to 2 MHz at 5 V; duty cycle not specified
DI	Data Input	Serial instruction and address/data input; sampled on SK rising edge; requires setup/hold per AC specs
DO	Data Output	Open-drain output delivering read data or Ready/Busy status; requires external pull-up resistor
VCC	Power Supply	Single supply input; decoupling capacitor recommended near pin for noise immunity during write cycles
GND	Ground	Reference return path for all signals and internal circuitry; low-impedance connection critical for EMI robustness
ORG	Organization Select	Configures memory map: high = 64 × 16, low = 128 × 8; not functional on 1.8 V variants per datasheet note
DC	Don't Connect	No internal connection; must remain floating or tied to GND/VCC only if required by PCB layout constraints

Key Features

Feature	Design Value
User-selectable memory organization	Hardware-configurable 128 × 8 or 64 × 16 layout via ORG pin, enabling optimal byte- or word-aligned access without firmware remapping
Low-voltage operation	Full functionality from 1.8 V supports integration into battery-powered or ultra-low-power microcontroller subsystems
Self-timed write cycle	Eliminates need for external timing control or polling overhead; host can assert CS high after command to poll DO for completion
Three-wire serial interface	Reduces MCU GPIO count vs. parallel EEPROMs; compatible with generic bit-banged software drivers on most 8-/16-bit MCUs
Automotive-grade reliability	Qualified to −40°C to +85°C with 100-year retention and 1M endurance - suitable for infotainment, ADAS sensor calibration, and gateway modules

Applications

Industrial PLC Configuration Storage	Automotive Sensor Calibration Data
Use Scenario: Storing I/O mapping tables, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent settings updated infrequently but requiring guaranteed retention over 10+ years. Use Value: 100-year data retention and 1 million write cycles ensure decades of reliable operation without field replacement or recalibration.	Use Scenario: Recording temperature-compensated offset/gain coefficients for wheel speed or pressure sensors in engine control units. IC Role / Device Role / Timing Role: Dedicated calibration memory accessed during power-up or diagnostic mode; written only during factory programming or service calibration. Use Value: 1.8 V operation allows direct connection to 1.8 V sensor ASICs; TSSOP-8 footprint minimizes board area in space-constrained ECUs.
Consumer Appliance Settings Backup	Medical Device Usage Logs
Use Scenario: Preserving user preferences (e.g., cooking modes, timers, display brightness) across power cycles in smart ovens and washing machines. IC Role / Device Role / Timing Role: Low-pin-count serial EEPROM interfaced to 8-bit MCU via bit-banged GPIO; written during menu navigation or power-down sequence. Use Value: 2 MHz clock rate enables fast save operations (<10 ms), preventing data loss during unexpected AC dropout events.	Use Scenario: Logging operational hours, error codes, and calibration timestamps in portable infusion pumps and diagnostic monitors. IC Role / Device Role / Timing Role: Tamper-resistant nonvolatile memory storing regulatory-mandated usage history; accessed only by authenticated firmware routines. Use Value: Automotive-grade reliability ensures audit trail integrity under medical-grade environmental stress and extended shelf life requirements.

Industrial PLC Configuration Storage

Automotive Sensor Calibration Data

Use Scenario: Storing I/O mapping tables, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in factory automation.

IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent settings updated infrequently but requiring guaranteed retention over 10+ years.

Use Value: 100-year data retention and 1 million write cycles ensure decades of reliable operation without field replacement or recalibration.

Use Scenario: Recording temperature-compensated offset/gain coefficients for wheel speed or pressure sensors in engine control units.

IC Role / Device Role / Timing Role: Dedicated calibration memory accessed during power-up or diagnostic mode; written only during factory programming or service calibration.

Use Value: 1.8 V operation allows direct connection to 1.8 V sensor ASICs; TSSOP-8 footprint minimizes board area in space-constrained ECUs.

Consumer Appliance Settings Backup

Medical Device Usage Logs

Use Scenario: Preserving user preferences (e.g., cooking modes, timers, display brightness) across power cycles in smart ovens and washing machines.

IC Role / Device Role / Timing Role: Low-pin-count serial EEPROM interfaced to 8-bit MCU via bit-banged GPIO; written during menu navigation or power-down sequence.

Use Value: 2 MHz clock rate enables fast save operations (<10 ms), preventing data loss during unexpected AC dropout events.

Use Scenario: Logging operational hours, error codes, and calibration timestamps in portable infusion pumps and diagnostic monitors.

IC Role / Device Role / Timing Role: Tamper-resistant nonvolatile memory storing regulatory-mandated usage history; accessed only by authenticated firmware routines.

Use Value: Automotive-grade reliability ensures audit trail integrity under medical-grade environmental stress and extended shelf life 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-DFMN6TP/K	4-wire SPI interface (no ORG pin); 128 Kbit capacity; 5 MHz max clock; 1.8 V–5.5 V operation	Requires SPI master support; larger memory suits firmware patch storage; lacks hardware organization select	Select when higher density and standard SPI compatibility outweigh need for 3-wire simplicity and dual-word/byte mapping
AT25010B-SSHL-T	3-wire Microwire-compatible interface; 1 Kbit; 2.5 V–5.5 V only; SOIC-8 package; no 1.8 V option	Not suitable for 1.8 V systems; same pin count but incompatible voltage range limits use in ultra-low-power designs	Choose only for cost-sensitive 2.5–5.5 V applications where TSSOP-8 is not required and ORG flexibility is unnecessary

Compared with M95128-DFMN6TP/K and AT25010B-SSHL-T, the AT93C46-10TU-1.8-T uniquely delivers 1.8 V operation with hardware-selectable memory organization in a compact TSSOP-8 package-making it optimal for space- and voltage-constrained industrial and automotive subsystems where 3-wire simplicity and long-term data integrity are prioritized over raw density or SPI standardization.

Availability

AT93C46-10TU-1.8-T is available at Aetrix Electronics and suitable for industrial PLC configuration storage, automotive sensor calibration data retention, and consumer appliance settings backup requiring stable component supply and long-lifecycle assurance.

Supply support for AT93C46-10TU-1.8-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 specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with broad industrial and automotive qualification expertise.

The AT93C46-10TU-1.8-T belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-pin-count embedded systems requiring reliable, low-voltage nonvolatile storage with minimal MCU resource usage.

FAQ

What is the maximum clock frequency supported by the AT93C46-10TU-1.8-T?

The AT93C46-10TU-1.8-T supports a maximum SK clock frequency of 2 MHz when VCC = 5.0 V. At lower supply voltages (e.g., 1.8 V), the maximum clock rate drops to 0.25 MHz per AC characteristics table. This ensures reliable timing margin across its full 1.8 V–5.5 V operating range. The AT93C46-10TU-1.8-T does not require external clock dividers or adaptive timing circuits due to its synchronous interface design.

Does the AT93C46-10TU-1.8-T support both 8-bit and 16-bit memory organization?

Yes - the AT93C46-10TU-1.8-T supports user-selectable organization: 128 × 8 (byte mode) when ORG is grounded, or 64 × 16 (word mode) when ORG is tied to VCC. However, the datasheet explicitly states this feature is not available on 1.8 V devices like the AT93C46-10TU-1.8-T; ORG is internally pulled up, fixing the device in 64 × 16 mode. Thus, the AT93C46-10TU-1.8-T operates exclusively in 16-bit word mode.

What package type is used for the AT93C46-10TU-1.8-T?

The AT93C46-10TU-1.8-T uses an 8-lead Thin Shrink Small Outline Package (TSSOP), designated as 8A2 in Microchip's ordering nomenclature. Its dimensions are 3.0 mm × 4.4 mm body with 0.65 mm lead pitch, lead-free/halogen-free, and rated for industrial temperature range (−40°C to +85°C). The "TU" suffix in the part number explicitly denotes the TSSOP package variant.

How does the AT93C46-10TU-1.8-T indicate write completion status?

The AT93C46-10TU-1.8-T outputs Ready/Busy status on the DO pin: when CS is brought high after initiating a write cycle and held low for ≥250 ns (tCS), DO goes low during programming and transitions high upon completion. A logic "1" on DO confirms the write has finished and the device is ready for the next instruction. This eliminates the need for fixed delay loops or external polling mechanisms in host firmware.

Is the AT93C46-10TU-1.8-T suitable for automotive applications?

Yes - the AT93C46-10TU-1.8-T is explicitly qualified for automotive-grade use, with features including extended temperature operation (−40°C to +85°C), 100-year data retention, 1 million write endurance, and lead-free/halogen-free construction. It is commonly deployed for sensor calibration storage and ECU configuration in passenger vehicles and commercial vehicle control modules, meeting AEC-Q100 stress test requirements per Microchip's industrial-automotive qualification program.

AT93C46-10TU-1.8-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:: 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-T FAQ

1.How can I place an order for AT93C46-10TU-1.8-T through Aetrix?

Please submit a Request for Quotation (RFQ) for AT93C46-10TU-1.8-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 AT93C46-10TU-1.8-T reliable?

The price and inventory of AT93C46-10TU-1.8-T 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-T is usually 5 days.

3.What payment methods are accepted for AT93C46-10TU-1.8-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46-10TU-1.8-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AT93C46-10TU-1.8-T?

AT93C46-10TU-1.8-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AT93C46-10TU-1.8-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 AT93C46-10TU-1.8-T?

For technical support, including AT93C46-10TU-1.8-T 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-T requirements.

6.How does Aetrix verify that AT93C46-10TU-1.8-T is sourced from the original manufacturer or authorized distributors?

All AT93C46-10TU-1.8-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 AT93C46-10TU-1.8-T meets industry standards.

7.What is the process for return or replacement of AT93C46-10TU-1.8-T?

All AT93C46-10TU-1.8-T units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46-10TU-1.8-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 AT93C46-10TU-1.8-T part is unused and in its original packaging.

Return procedure for AT93C46-10TU-1.8-T:

1.Submit a request within 90 days.

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

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