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Microchip Technology AT93C46-10SC-2.5
- Part No.:
- AT93C46-10SC-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C46-10SC-2.5.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,217
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Product details
Overview
AT93C46-10SC-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 supply, featuring 10 ms max self-timed write cycle, 1 million write endurance, and 100-year data retention. It serves as nonvolatile configuration storage in embedded microcontroller systems requiring low-voltage operation and space-constrained PCB layouts.
For engineers reviewing the AT93C46-10SC-2.5 datasheet, AT93C46-10SC-2.5 pinout, AT93C46-10SC-2.5 application, or AT93C46-10SC-2.5 equivalent, this page delivers verified electrical parameters, JEDEC SOIC-8 package details, functional timing behavior, real-world use cases, and validated alternative parts for industrial-grade design-in.
Technical Context
The AT93C46-10SC-2.5 implements a synchronous 3-wire serial interface (CS, SK, DI/DO) with instruction-based command set including READ, WRITE, ERASE, EWEN, and EWDS. Its ORG pin selects between x8 and x16 memory organization, and internal pull-up ensures x16 default when unconnected - though this feature is disabled on 1.8V variants only.
Write operations require explicit Erase/Write Enable (EWEN) prior to programming; status feedback is provided via DO pin during CS high after tCS ≥ 250 ns. The device supports READY/BUSY polling and operates across -40°C to +85°C industrial temperature range in 8-lead JEDEC SOIC (8S1) package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 × 8 or 64 × 16 organization) |
| Supply Voltage Range | 2.5V to 5.5V - enables direct interfacing with 2.5V/3.3V logic without level shifters |
| Max Clock Frequency | 500 kHz at 2.5V - defines maximum serial transaction rate under low-voltage operation |
| Write Cycle Time | 10 ms maximum - determines minimum time between successive write commands |
| Endurance | 1 million write cycles - supports frequent field updates in calibration or logging applications |
| Data Retention | 100 years at 25°C - guarantees long-term firmware or configuration integrity without refresh |
| ESD Protection | >4000V HBM - provides robust handling margin during board assembly and field service |
Pinout & Package
AT93C46-10SC-2.5 is housed in an 8-lead JEDEC-standard SOIC package (8S1), 0.150" wide, with gull-wing leads and standard 1.27 mm pitch. Pin 1 is marked by a beveled corner or dot; orientation follows JEDEC MS-001BA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal - must be held low for entire instruction sequence; drives READY/BUSY status when pulsed high post-write |
| SK | Serial Clock | Synchronous edge-triggered clock - rising edge samples DI, falling edge outputs DO; timing constraints scale with VCC |
| DI | Data Input | Serial command/address/data input - accepts 7-bit address + op-code + data per instruction; setup/hold times defined per voltage grade |
| DO | Data Output | Open-drain serial output - returns read data or READY/BUSY status; requires external pull-up resistor |
| GND | Ground Reference | Primary return path for VCC and I/O - must be low-impedance connection to minimize noise coupling into serial interface |
| VCC | Power Supply | Single-supply input - supports 2.5V–5.5V operation; bypass capacitor (0.1 µF) required near pin for stable read/write margins |
| ORG | Organization Select | Logic-level controlled memory mapping - tied to VCC for 64×16 mode, GND for 128×8 mode; internal ~1 MΩ pull-up defaults to x16 if floating |
| DC | No Connect | Unused terminal - must remain unconnected; no internal bonding or circuitry attached |
Key Features
| Feature | Design Value |
|---|---|
| 3-wire serial interface | Reduces MCU GPIO count and PCB routing complexity versus SPI/I²C; eliminates need for dedicated bus arbitration logic |
| User-selectable memory organization | Enables flexible byte- or word-oriented access without changing firmware - simplifies migration between 8-bit and 16-bit host architectures |
| Self-timed write cycle | Removes requirement for external write-complete polling delay or timer interrupts - improves deterministic system response |
| Industrial temperature range | Validated operation from –40°C to +85°C - suitable for automotive body control modules and industrial PLCs without derating |
| Low standby current | 10 µA max at 2.5V - extends battery life in always-on sensor nodes or portable diagnostic tools |
Applications
| Printer Firmware Storage | Motor Drive Configuration |
|---|---|
Use Scenario: Storing printer model-specific calibration tables, nozzle alignment offsets, and ink usage counters across power cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration register - retains settings during hot-swap cartridge changes and firmware updates. Use Value: Enables plug-and-play compatibility across printer families using identical hardware platform with differentiated EEPROM content. |
Use Scenario: Holding motor phase timing profiles, current limit thresholds, and thermal shutdown hysteresis values in BLDC driver boards. IC Role / Device Role / Timing Role: Parameter memory - loaded at power-on reset to configure PWM generator and fault protection logic. Use Value: Allows field re-tuning of motor performance without firmware reflashing or hardware modification. |
| Smart Meter Security Keys | IoT Edge Node Identity |
Use Scenario: Securing AES encryption keys and meter serial number in utility-grade electricity meters deployed outdoors. IC Role / Device Role / Timing Role: Tamper-resistant key vault - accessed only during secure boot handshake with metrology SoC. Use Value: Meets IEC 62056-21 security requirements via write-protection and high endurance against repeated key rotation. |
Use Scenario: Storing unique device identifiers (MAC, UUID), TLS certificate fingerprints, and OTA update signatures in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Identity anchor - read once at startup to initialize secure boot chain and network authentication. Use Value: Provides cryptographic root-of-trust with 100-year retention - eliminates need for cloud-based identity provisioning. |
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, 2.5–5.5V, 20 MHz clock, 5 ms write cycle | Higher density and faster interface; requires SPI-capable MCU and additional CS line | Select when migrating to higher-capacity storage with minimal firmware rewrite and existing SPI infrastructure |
| 25AA010A-I/P | 1 Kbit SPI interface, 1.8–5.5V, 10 MHz clock, 5 ms write cycle, same SOIC-8 package | Wider voltage range down to 1.8V; SPI protocol differs from 3-wire - requires different driver stack | Choose for designs needing 1.8V compatibility or where SPI peripherals are already allocated and 3-wire GPIO is constrained |
Compared with AT93C46-10SC-2.5, the M95128-WMN6TP offers 128× more capacity but demands SPI resource allocation, while the 25AA010A-I/P matches density and package but shifts to SPI - both require interface-layer redesign, making AT93C46-10SC-2.5 optimal for legacy 3-wire systems prioritizing pin count and code reuse.
Availability
AT93C46-10SC-2.5 is available at Aetrix Electronics and suitable for industrial automation controllers, medical diagnostic equipment, and smart energy metering systems requiring stable component supply over extended production lifecycles.
Supply support for AT93C46-10SC-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 product support, qualification, and manufacturing continuity for the AT93C series EEPROMs.
The AT93C46 belongs to Microchip's legacy serial EEPROM portfolio designed for cost-sensitive, space-constrained embedded systems requiring reliable nonvolatile storage with minimal interface overhead.
FAQ
What is the maximum clock frequency supported by AT93C46-10SC-2.5 at 2.5V?
The AT93C46-10SC-2.5 supports a maximum serial clock frequency of 500 kHz when operated at 2.5V supply, as specified in the AC Characteristics table for VCC = 2.5V–5.5V. This limit ensures reliable setup/hold timing for DI and DO signals under low-voltage conditions and must be observed to prevent command corruption or incomplete writes. Exceeding this frequency may result in intermittent communication failures.
Does AT93C46-10SC-2.5 require an external pull-up resistor on the DO pin?
Yes, AT93C46-10SC-2.5 features an open-drain DO output and requires an external pull-up resistor (typically 4.7 kΩ to VCC) to ensure valid logic-high levels during read operations and READY/BUSY status reporting. Without this resistor, DO remains floating and cannot drive high, causing read data corruption or false BUSY indication. The value must balance rise time and power consumption per application speed requirements.
Can the ORG pin of AT93C46-10SC-2.5 be left unconnected?
Yes, the ORG pin of AT93C46-10SC-2.5 can be left unconnected: an internal ~1 MΩ pull-up resistor will default the memory organization to 64 × 16 mode. This behavior is confirmed in the datasheet and applies to all voltage grades except 1.8V devices. However, for production reliability, hardwiring ORG to VCC or GND is recommended to eliminate potential noise susceptibility on the high-impedance node.
Is AT93C46-10SC-2.5 qualified for automotive applications?
No, AT93C46-10SC-2.5 is rated for industrial temperature range (–40°C to +85°C) and is not AEC-Q100 qualified. While its operating range overlaps with some automotive ambient conditions, it lacks automotive-specific stress testing, failure rate validation, and PPAP documentation. For automotive use, Microchip recommends the AEC-Q100 qualified AT24C01C-SSHM-T or similar automotive EEPROMs instead of AT93C46-10SC-2.5.
How does the write protection mechanism work on AT93C46-10SC-2.5?
AT93C46-10SC-2.5 uses instruction-based write protection: the device powers up in Erase/Write Disable (EWDS) state, blocking all programming commands until an Erase/Write Enable (EWEN) instruction is issued. After EWEN, WRITE and ERASE remain enabled until EWDS is executed again or power is cycled. There is no hardware write-protect pin - protection relies entirely on software sequencing and proper instruction ordering in host firmware.
AT93C46-10SC-2.5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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:
- 2.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT93C46-10SC-2.5 FAQ
1.How can I place an order for AT93C46-10SC-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46-10SC-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 AT93C46-10SC-2.5 reliable?
The price and inventory of AT93C46-10SC-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 AT93C46-10SC-2.5 is usually 5 days.
3.What payment methods are accepted for AT93C46-10SC-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46-10SC-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46-10SC-2.5?
AT93C46-10SC-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46-10SC-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 AT93C46-10SC-2.5?
For technical support, including AT93C46-10SC-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46-10SC-2.5 requirements.
6.How does Aetrix verify that AT93C46-10SC-2.5 is sourced from the original manufacturer or authorized distributors?
All AT93C46-10SC-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 AT93C46-10SC-2.5 meets industry standards.
7.What is the process for return or replacement of AT93C46-10SC-2.5?
All AT93C46-10SC-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46-10SC-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 AT93C46-10SC-2.5 part is unused and in its original packaging.
Return procedure for AT93C46-10SC-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT93C46-10SC-2.5 Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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