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

Microchip Technology AT93C46-10PI-2.5

Name: AT93C46-10PI-2.5
Brand: Microchip Technology
SKU: AT93C46-10PI-2.5
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AT93C46-10PI-2.5

Manufacturer:: Microchip Technology

Category:: Memory

Package:: 8-DIP (0.300", 7.62mm)

Datasheet:: AT93C46-10PI-2.5.pdf

Description:: IC EEPROM 1KBIT 3-WIRE 2MHZ 8DIP

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Product details

Overview

AT93C46-10PI-2.5 from Microchip Technology (formerly Atmel) is a 1K-bit 3-wire serial EEPROM with user-selectable 128 × 8 or 64 × 16 organization, operating from 2.5V to 5.5V, featuring 10 ms max self-timed write cycle, 1 million write endurance, and 100-year data retention. It serves as nonvolatile configuration storage in industrial control modules, sensor calibration registers, and power management ICs.

For engineers reviewing the AT93C46-10PI-2.5 datasheet, AT93C46-10PI-2.5 pinout, AT93C46-10PI-2.5 application, or AT93C46-10PI-2.5 equivalent, key selection criteria include V_CC range compatibility (2.5–5.5 V), industrial temperature rating (−40°C to +85°C), 8-pin PDIP/SOIC/TSSOP package options, and ORG-pin configurable memory width for legacy bus alignment.

Technical Context

The AT93C46-10PI-2.5 implements a synchronous 3-wire serial interface (CS, SK, DI/DO) with start-bit–driven instruction decoding and no external clock dependency beyond SK. Its internal organization is dynamically selected via the ORG pin: tied to V_CC enables 64-word × 16-bit mode; grounded enables 128-word × 8-bit mode.

Write operations require explicit EWEN instruction prior to ERASE or WRITE, and status feedback is provided via DO pin during CS high after t_CS ≥ 250 ns. The device supports full-array ERAL/WRAL only at V_CC = 4.5–5.5 V and excludes 1.8 V variants from ORG pull-up functionality.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	1024 bits (128 × 8 or 64 × 16 organization)
Supply Voltage Range	2.5 V to 5.5 V - enables direct interfacing with 2.5 V logic and mixed-voltage systems without level shifters
Max Clock Frequency	500 kHz at 2.5 V - sets maximum serial transaction rate for configuration reads/writes
Write Cycle Time	10 ms maximum - defines minimum time between successive write commands; blocks further I/O until completion
Endurance	1 million write cycles - supports frequent field updates such as metering log entries or calibration offset adjustments
Data Retention	100 years at 25°C - ensures long-term validity of stored firmware parameters or security keys without refresh
Operating Temperature	−40°C to +85°C - qualified for industrial-grade deployment in motor drives, PLCs, and outdoor infrastructure

Pinout & Package

AT93C46-10PI-2.5 is supplied in 8-pin PDIP (8P3), JEDEC SOIC (8S1), EIAJ SOIC (8S2), and TSSOP (8T) packages. All variants share identical pin numbering and signal mapping per the standard 8-pin serial EEPROM layout.

Pin/Terminal	Circuit Role	Design Meaning
CS	Chip Select	Active-low enable: must be low for instruction initiation and remains low throughout command sequence
SK	Serial Clock	Input-only edge-triggered clock synchronizing all bit transfers; no internal clock generation
DI	Data Input	Serial instruction/address/data input; sampled on SK rising edge
DO	Data Output	Open-drain output providing read data or READY/BUSY status when CS is high post-write
GND	Ground Reference	Signal and power return path; decoupling capacitor required within 10 mm of V_CC pin
V_CC	Power Supply	Single supply input; must remain stable within ±5 % during write cycles to prevent corruption
ORG	Organization Select	Logic-high = 64 × 16 mode; logic-low = 128 × 8 mode; unconnected defaults to x16 via internal ~1 MΩ pull-up (not on 1.8 V versions)
DC	No Connect	Internally unused; must be left floating or tied to GND/V_CC - no electrical loading permitted

Key Features

Feature	Design Value
User-selectable memory organization	Hardware-configurable 128 × 8 or 64 × 16 layout via ORG pin - eliminates need for software bit-packing in 8-bit microcontroller systems
Self-timed write cycle	No external timing control required; DO pin reports BUSY/READY status - simplifies host firmware state machine design
Industrial temperature grade	−40°C to +85°C operation - validated for use in factory automation controllers and energy metering hardware
ESD protection	>4000 V HBM - withstands handling and board-level transients without additional protection circuitry
Low standby current	10 µA max at 2.5 V - enables battery-backed applications like smart sensors with multi-year shelf life

Applications

Industrial Sensor Calibration	Motor Drive Configuration
Use Scenario: Storing temperature-compensated offset/gain coefficients for analog front-end circuits in pressure or current sensors. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during power-up initialization; read-only during normal operation. Use Value: Enables field recalibration without firmware update; 100-year retention guarantees accuracy across product lifetime.	Use Scenario: Holding PWM dead-time settings, current limit thresholds, and fault recovery modes in BLDC motor controllers. IC Role / Device Role / Timing Role: Configuration register bank mapped to MCU's SPI-like 3-wire interface during boot and runtime reconfiguration. Use Value: Supports dynamic tuning via service tools; 1M endurance allows >1000 field updates over 10+ years.
Smart Energy Metering	PLC I/O Module Identity
Use Scenario: Recording tariff schedules, meter serial number, and cryptographic keys in ANSI C12.22-compliant electricity meters. IC Role / Device Role / Timing Role: Secure boot-time credential loader; write-protected after manufacturing programming. Use Value: Meets ANSI/IEEE tamper-resistance requirements; 2.5 V operation aligns with meter's low-power RTC domain.	Use Scenario: Storing module type, slot position, firmware revision, and channel count in modular programmable logic controller backplanes. IC Role / Device Role / Timing Role: Plug-and-play identification memory read by backplane controller at insertion detection. Use Value: Eliminates DIP-switch configuration; industrial temp rating ensures reliability in cabinet-mounted I/O racks.

Industrial Sensor Calibration

Motor Drive Configuration

Use Scenario: Storing temperature-compensated offset/gain coefficients for analog front-end circuits in pressure or current sensors.

IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during power-up initialization; read-only during normal operation.

Use Value: Enables field recalibration without firmware update; 100-year retention guarantees accuracy across product lifetime.

Use Scenario: Holding PWM dead-time settings, current limit thresholds, and fault recovery modes in BLDC motor controllers.

IC Role / Device Role / Timing Role: Configuration register bank mapped to MCU's SPI-like 3-wire interface during boot and runtime reconfiguration.

Use Value: Supports dynamic tuning via service tools; 1M endurance allows >1000 field updates over 10+ years.

Smart Energy Metering

PLC I/O Module Identity

Use Scenario: Recording tariff schedules, meter serial number, and cryptographic keys in ANSI C12.22-compliant electricity meters.

IC Role / Device Role / Timing Role: Secure boot-time credential loader; write-protected after manufacturing programming.

Use Value: Meets ANSI/IEEE tamper-resistance requirements; 2.5 V operation aligns with meter's low-power RTC domain.

Use Scenario: Storing module type, slot position, firmware revision, and channel count in modular programmable logic controller backplanes.

IC Role / Device Role / Timing Role: Plug-and-play identification memory read by backplane controller at insertion detection.

Use Value: Eliminates DIP-switch configuration; industrial temp rating ensures reliability in cabinet-mounted I/O racks.

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
M95128-WMN6TP	128 Kbit SPI interface, 2.5–5.5 V, 20 MHz clock, WIP/WEL status flags	Higher density, faster interface, but requires SPI master with write-enable polling	Select when migrating to higher-capacity storage with existing SPI infrastructure and need for faster writes
STK12C68-55I	8K-bit NVSRAM with parallel interface, 5 V only, 55 ns access, unlimited write endurance	Parallel bus interface, volatile+nonvolatile hybrid architecture, no serial protocol overhead	Select when system uses 8-bit address/data bus and requires byte-level random writes without delay

Compared with AT93C46-10PI-2.5, M95128-WMN6TP offers 128× more capacity and SPI speed but adds protocol complexity; STK12C68-55I provides instant-write capability and parallel access but lacks voltage flexibility and serial footprint efficiency.

Availability

AT93C46-10PI-2.5 is available at Aetrix Electronics and suitable for industrial sensor calibration, motor drive configuration, and smart energy metering requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AT93C46-10PI-2.5 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 technical and manufacturing continuity for the AT93C series. The company specializes in microcontrollers, analog, and nonvolatile memory solutions for industrial and automotive markets.

The AT93C46-10PI-2.5 belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, space-constrained applications needing reliable, low-voltage, pin-efficient configuration storage in harsh environments.

FAQ

What is the function of the ORG pin on the AT93C46-10PI-2.5?

The ORG pin on the AT93C46-10PI-2.5 selects internal memory organization: logic high (V_CC) configures 64 words × 16 bits; logic low (GND) configures 128 words × 8 bits. When left unconnected, an internal ~1 MΩ pull-up selects x16 mode - a feature excluded in 1.8 V variants but fully supported in the AT93C46-10PI-2.5's 2.5–5.5 V range.

Does the AT93C46-10PI-2.5 support write operations at 2.5 V?

Yes, the AT93C46-10PI-2.5 is explicitly rated for full functionality-including write, erase, and read-at V_CC = 2.5 V to 5.5 V. Its AC characteristics specify 500 kHz max clock frequency and 10 ms max write cycle time under 2.5 V conditions, and DC parameters including ISB2 (10 µA max standby current) are guaranteed across this range.

How does the AT93C46-10PI-2.5 indicate write completion?

The AT93C46-10PI-2.5 outputs READY/BUSY status on the DO pin: after initiating a write, if CS is brought high for ≥250 ns (t_CS), DO asserts logic '0' during programming and transitions to logic '1' upon completion. This status is valid only if CS goes high before the 10 ms t_WP timeout expires; no polling is needed once '1' is observed.

Can the AT93C46-10PI-2.5 be used in place of the AT93C46-10PI?

Yes - the AT93C46-10PI-2.5 is a direct functional and pin-compatible replacement for the AT93C46-10PI, extending the minimum supply voltage from 4.5 V down to 2.5 V while preserving identical timing, instruction set, package options, and industrial temperature rating (−40°C to +85°C). No PCB or firmware changes are required for migration.

What packaging options are available for the AT93C46-10PI-2.5?

The AT93C46-10PI-2.5 is offered in five packaging variants: 8P3 (8-pin PDIP), 8S1 (JEDEC SOIC), 8S2 (EIAJ SOIC), and 8T (TSSOP), with the 'I' suffix confirming industrial temperature qualification across all types. Pinout and signal definitions are identical across packages, enabling drop-in substitution based on board space and assembly requirements.

AT93C46-10PI-2.5 Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 8-DIP (0.300", 7.62mm)

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:: 2.5V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 8-PDIP

AT93C46-10PI-2.5 FAQ

1.How can I place an order for AT93C46-10PI-2.5 through Aetrix?

Please submit a Request for Quotation (RFQ) for AT93C46-10PI-2.5 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 AT93C46-10PI-2.5 reliable?

The price and inventory of AT93C46-10PI-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT93C46-10PI-2.5 is usually 5 days.

3.What payment methods are accepted for AT93C46-10PI-2.5?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46-10PI-2.5 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AT93C46-10PI-2.5?

AT93C46-10PI-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AT93C46-10PI-2.5 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 AT93C46-10PI-2.5?

For technical support, including AT93C46-10PI-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46-10PI-2.5 requirements.

6.How does Aetrix verify that AT93C46-10PI-2.5 is sourced from the original manufacturer or authorized distributors?

All AT93C46-10PI-2.5 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 AT93C46-10PI-2.5 meets industry standards.

7.What is the process for return or replacement of AT93C46-10PI-2.5?

All AT93C46-10PI-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46-10PI-2.5, 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 AT93C46-10PI-2.5 part is unused and in its original packaging.

Return procedure for AT93C46-10PI-2.5:

1.Submit a request within 90 days.

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

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