Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Microchip Technology AT93C46A-10TI-2.7

Name: AT93C46A-10TI-2.7
Brand: Microchip Technology
SKU: AT93C46A-10TI-2.7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: AT93C46A-10TI-2.7

Manufacturer:: Microchip Technology

Category:: Memory

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

Datasheet:: AT93C46A-10TI-2.7.pdf

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

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,511

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

AT93C46A-10TI-2.7 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 microcontroller configuration storage, calibration data logging, and system parameter backup in automotive and industrial control units.

For engineers reviewing the AT93C46A-10TI-2.7 datasheet, AT93C46A-10TI-2.7 pinout, AT93C46A-10TI-2.7 application, or AT93C46A-10TI-2.7 equivalent, key selection criteria include VCC range compatibility (2.7–5.5V), TSSOP-8 packaging, 16-bit word organization, ready/busy status reporting via DO pin, and EWEN/EWDS instruction-based write protection.

Technical Context

The AT93C46A-10TI-2.7 implements a synchronous three-wire interface (CS/SK/DI/DO) with instruction-set-driven operation including READ, WRITE, ERASE, EWEN, EWDS, ERAL, and WRAL. Memory is organized as 64 words × 16 bits, with address decoding and output buffering integrated on-die.

It uses a self-timed internal write cycle requiring no external timing control; DO pin outputs ready/busy status when CS is asserted after tCS ≥ 250 ns. Write enable state persists until EWDS instruction or power removal, ensuring robust data integrity during power transitions.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	1024 bits (64 × 16-bit words) - fixed word-width architecture simplifies host firmware handling of configuration data.
VCC Range	2.7V to 5.5V - supports direct interfacing with 3.3V and 5V microcontrollers without level-shifting.
Interface	Three-wire serial (CS/SK/DI/DO) - minimal GPIO usage; no SPI mode bits or chip-select arbitration logic required.
Max Clock Rate	2 MHz at VCC = 5V - enables fast read/write throughput (e.g., ~16 µs per 16-bit word read) in high-speed systems.
Write Endurance	1 million cycles - sufficient for field-updatable calibration tables updated daily over 27 years.
Data Retention	100 years at +25°C - ensures long-term reliability in unattended industrial equipment and automotive ECUs.
Operating Temp	−40°C to +85°C - qualified for industrial temperature grade operation in harsh environments.

Pinout & Package

AT93C46A-10TI-2.7 is supplied 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 signal; must be held low for ≥250 ns before SK edge to initiate valid instruction sequence.
SK	Serial Clock	Input clock synchronizing all data transfers; rising edge samples DI, falling edge clocks DO.
DI	Data Input	Serial input for instructions and write data; accepts start bit (1), op code, address, and 16-bit payload.
DO	Data Output	Tri-state serial output; provides read data or ready/busy status (1 = ready, 0 = busy) when CS is high post-write.
GND	Ground Reference	Primary return path for VCC and I/O; requires low-impedance PCB connection to minimize noise coupling.
VCC	Power Supply	Single supply input (2.7–5.5V); decoupling capacitor (0.1 µF) recommended within 10 mm of pin.
NC	No Connect	Internally unused pin; must remain floating or grounded per layout guidelines - not to be tied to VCC or driven.
DC	Device Configuration	Factory-bonded pin determining internal logic configuration; not user-accessible or externally connected.

Key Features

Feature	Design Value
Self-timed write cycle	Eliminates need for external write timing control; DO pin reports completion status, enabling deterministic host polling.
Erase/write enable/disable protocol	EWEN/EWDS instructions enforce intentional programming - prevents accidental writes during brown-out or reset conditions.
Ready/busy status reporting	DO pin toggles between high-impedance and logic level upon CS assertion, allowing real-time status monitoring without dedicated interrupt lines.
16-bit word organization	Matches common MCU register widths and calibration parameter structures, reducing firmware bit-manipulation overhead.
Low standby current	20 µA max at 2.7V - extends battery life in always-on sensor nodes and portable diagnostic tools.

Applications

Industrial PLC Configuration Storage	Automotive ECU Calibration Data
Use Scenario: Storing I/O mapping, PID tuning parameters, and fault log thresholds in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed during boot and runtime reconfiguration; retains values across power cycles and brown-outs. Use Value: Enables field-upgradable logic behavior without hardware changes; 1M endurance supports weekly parameter updates over 19+ years.	Use Scenario: Holding fuel trim offsets, throttle position learning values, and emission control constants in engine control units operating under extended temperature ranges. IC Role / Device Role / Timing Role: Calibration data repository synchronized with CAN message triggers; accessed only during initialization or service-mode updates. Use Value: Maintains vehicle performance consistency across maintenance intervals; 100-year retention ensures data integrity over full vehicle lifecycle.
Medical Device Settings Backup	Smart Meter Firmware Parameters
Use Scenario: Preserving user-defined alarm thresholds, dose limits, and display preferences in portable infusion pumps and diagnostic monitors. IC Role / Device Role / Timing Role: Secure, tamper-resistant settings store accessed via microcontroller's GPIO-controlled serial interface during power-up or menu navigation. Use Value: Complies with IEC 62304 safety requirements for persistent configuration; low-voltage operation supports coin-cell backup during main power loss.	Use Scenario: Storing tariff schedules, metering constants, and communication credentials in ANSI C12.19-compliant electricity meters deployed in utility grids. IC Role / Device Role / Timing Role: Tamper-evident parameter vault updated via optical port or RF interface; write-protected by EWDS after commissioning. Use Value: Prevents unauthorized parameter modification; 2.7–5.5V range accommodates wide-input DC-DC converters used in meter power supplies.

Industrial PLC Configuration Storage

Automotive ECU Calibration Data

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

IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed during boot and runtime reconfiguration; retains values across power cycles and brown-outs.

Use Value: Enables field-upgradable logic behavior without hardware changes; 1M endurance supports weekly parameter updates over 19+ years.

Use Scenario: Holding fuel trim offsets, throttle position learning values, and emission control constants in engine control units operating under extended temperature ranges.

IC Role / Device Role / Timing Role: Calibration data repository synchronized with CAN message triggers; accessed only during initialization or service-mode updates.

Use Value: Maintains vehicle performance consistency across maintenance intervals; 100-year retention ensures data integrity over full vehicle lifecycle.

Medical Device Settings Backup

Smart Meter Firmware Parameters

Use Scenario: Preserving user-defined alarm thresholds, dose limits, and display preferences in portable infusion pumps and diagnostic monitors.

IC Role / Device Role / Timing Role: Secure, tamper-resistant settings store accessed via microcontroller's GPIO-controlled serial interface during power-up or menu navigation.

Use Value: Complies with IEC 62304 safety requirements for persistent configuration; low-voltage operation supports coin-cell backup during main power loss.

Use Scenario: Storing tariff schedules, metering constants, and communication credentials in ANSI C12.19-compliant electricity meters deployed in utility grids.

IC Role / Device Role / Timing Role: Tamper-evident parameter vault updated via optical port or RF interface; write-protected by EWDS after commissioning.

Use Value: Prevents unauthorized parameter modification; 2.7–5.5V range accommodates wide-input DC-DC converters used in meter power supplies.

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 max write time	Higher density, byte-addressable, but lacks 16-bit word alignment and 2.7V operation	Select when migrating to SPI-based platforms or requiring >1K capacity; requires firmware rewrite for instruction set and addressing.
STK13C66-SW35I	1K × 16-bit, three-wire interface, 2.7–5.5V, but rated for −40°C to +125°C and includes hardware write-protect pin	Broadened temperature range and dedicated WP pin simplify safety-critical designs	Prefer for under-hood automotive or high-reliability industrial use where extended temp or hardware lockout is mandated.

Compared with M95128-DRMN6TP/K and STK13C66-SW35I, the AT93C46A-10TI-2.7 offers optimal balance of 16-bit word structure, 2.7V compatibility, and TSSOP-8 footprint for space-constrained industrial controllers - without requiring SPI migration or over-specifying temperature grade.

Availability

AT93C46A-10TI-2.7 is available at Aetrix Electronics and suitable for industrial PLC configuration storage, automotive ECU calibration data retention, and medical device settings backup requiring stable component supply across multi-year production programs.

Supply support for AT93C46A-10TI-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 is a global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with emphasis on reliability, longevity, and embedded system integration.

The AT93C46A-10TI-2.7 belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-power industrial and automotive applications requiring simple three-wire configuration storage with guaranteed endurance and retention.

FAQ

What voltage range does the AT93C46A-10TI-2.7 support, and how does it affect system design?

The AT93C46A-10TI-2.7 supports a VCC range of 2.7V to 5.5V, enabling direct interface with both 3.3V and 5V microcontrollers without level shifters. This dual-voltage capability simplifies power domain partitioning in mixed-signal systems and reduces BOM count. The part maintains full AC/DC specifications across this range, including 2 MHz clock rate at 5V and 1 MHz minimum at 2.7V, as verified in Table 4 of the datasheet. Designers can confidently deploy AT93C46A-10TI-2.7 in brown-out-prone environments where supply may dip to 2.7V while retaining functional read/write capability.

How does the AT93C46A-10TI-2.7 implement write protection, and what safeguards prevent accidental writes?

The AT93C46A-10TI-2.7 uses instruction-based write protection: it powers up in Erase/Write Disable (EWDS) state, and an explicit EWEN instruction must be issued before any WRITE or ERASE command is accepted. Once enabled, programming remains active until EWDS is executed or power is cycled. This prevents spurious writes during power-up/down transients or noise on the bus. Additionally, the DO pin reports ready/busy status only when CS is asserted after tCS ≥ 250 ns, adding timing-based validation. These mechanisms ensure AT93C46A-10TI-2.7 meets industrial reliability requirements for configuration memory in mission-critical systems.

What is the memory organization of the AT93C46A-10TI-2.7, and why does it matter for firmware development?

The AT93C46A-10TI-2.7 organizes its 1024 bits as 64 words of 16 bits each - a fixed 16-bit word architecture. This matches common MCU register widths and calibration parameter structures (e.g., signed 16-bit gain/offset values), eliminating bit-packing/unpacking in firmware. Host software issues a 6-bit address (A5–A0) to access each word directly, simplifying driver code and reducing CPU overhead. Unlike byte-oriented EEPROMs, AT93C46A-10TI-2.7 avoids partial-word update risks, making it ideal for atomic parameter storage in real-time control loops.

Can the AT93C46A-10TI-2.7 be used in automotive applications, and what qualifications does it meet?

Yes, the AT93C46A-10TI-2.7 is qualified for automotive-grade use per its ordering code suffix (-10TI-2.7) and documentation: it is specified for −40°C to +85°C operation, offered in lead-free/halogen-free packaging, and tested for high reliability (1M write cycles, 100-year retention). While not AEC-Q100 certified as a standalone component, its electrical and environmental specs align with Tier-2 automotive subsystem requirements - such as body control modules and dashboard instrumentation - where extended temperature and long-term data integrity are mandatory. Designers should verify final system-level qualification per OEM requirements.

What package type is used for the AT93C46A-10TI-2.7, and what are its key mechanical characteristics?

The AT93C46A-10TI-2.7 is packaged in an 8-lead Thin Shrink Small Outline Package (TSSOP), designated JEDEC MO-153 variation AA, with body dimensions of 3.00 mm (D) × 4.40 mm (E) × 1.05 mm (A2) max height. Its 0.65 mm lead pitch and 4.4 mm width enable high-density PCB layouts. The package is lead-free and halogen-free, compliant with RoHS Directive 2011/65/EU. Pin 1 is marked by a corner chamfer, and the NC and DC pins are internally bonded but not user-connectable - PCB layout must leave them unconnected or grounded per Microchip's assembly guidelines to avoid functional disruption.

AT93C46A-10TI-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-10TI-2.7 FAQ

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

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

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

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

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

Note: Certain payment methods may incur a processing fee.

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

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

Once your AT93C46A-10TI-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-10TI-2.7?

For technical support, including AT93C46A-10TI-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46A-10TI-2.7 requirements.

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

All AT93C46A-10TI-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-10TI-2.7 meets industry standards.

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

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

Return procedure for AT93C46A-10TI-2.7:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…