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Microchip Technology AT93C46R-10SI-2.5
- Part No.:
- AT93C46R-10SI-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C46R-10SI-2.5.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,769
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Product details
Overview
AT93C46R-10SI-2.5 from Microchip Technology (formerly Atmel) is a 1K-bit 3-wire serial EEPROM with user-selectable 128×8 or 64×16 organization, 2.5V–5.5V supply range, 10 ms max self-timed write cycle, and industrial temperature rating (−40°C to +85°C). It delivers high reliability with 1 million write cycles and 100-year data retention in an 8-lead SOIC package with rotated pinout.
For engineers reviewing the AT93C46R-10SI-2.5 datasheet, AT93C46R-10SI-2.5 pinout, AT93C46R-10SI-2.5 application, or AT93C46R-10SI-2.5 equivalent, this device supports low-voltage embedded configuration storage, secure boot parameter retention, and factory calibration data persistence in space-constrained industrial control modules.
Technical Context
The AT93C46R-10SI-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 - except on 1.8V variants.
Operation requires Erase/Write Enable (EWEN) before programming; all writes are self-timed with READY/BUSY status reported via DO when CS is asserted post-command. The R suffix denotes rotated SOIC pinout (JEDEC-compliant), where VCC and DC positions swap versus standard layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 × 8 or 64 × 16 words) |
| Supply Voltage Range | 2.5V to 5.5V - enables direct interfacing with 2.5V logic and mixed-voltage systems without level shifters |
| Max Clock Frequency | 500 kHz at 2.5V - sets maximum serial transaction rate for configuration reads/writes |
| Write Cycle Time | 10 ms maximum - defines worst-case latency for nonvolatile parameter updates |
| Data Retention | 100 years - guarantees long-term integrity of calibration, serial ID, or security keys across product lifecycle |
| Endurance | 1 million write cycles - supports frequent field firmware or setting updates in programmable devices |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade operation in motor drives, PLCs, and outdoor equipment |
Pinout & Package
AT93C46R-10SI-2.5 uses an 8-lead JEDEC SOIC package (8S1) with rotated pinout: Pin 1 = DC, Pin 2 = VCC, Pin 3 = CS, Pin 4 = SK, Pin 5 = ORG, Pin 6 = GND, Pin 7 = DO, Pin 8 = DI.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DC | Don't Connect | No internal connection; must be left floating or tied to GND/VCC per layout guidelines - no electrical function |
| VCC | Power Supply | Primary supply input (2.5V–5.5V); decoupling capacitor required within 10 mm for stable read/write timing |
| CS | Chip Select | Active-low enable; must remain low for full instruction frame (start bit + op code + address + data) |
| SK | Serial Clock | Synchronous edge-triggered clock; rising edge latches DI, falling edge samples DO |
| ORG | Organization Select | High = 64×16 mode, Low = 128×8 mode; internal ~1 MΩ pull-up defaults to x16 if unconnected |
| GND | Ground Reference | Return path for VCC and I/O; requires low-impedance connection to system ground plane |
| DO | Data Output | Tri-state serial output; asserts READY ('1') or BUSY ('0') status when CS rises during write cycle |
| DI | Data Input | Serial command/data input; sampled on SK rising edge; requires setup/hold timing per AC specs |
Key Features
| Feature | Design Value |
|---|---|
| User-selectable memory organization | Runtime-configurable 128×8 or 64×16 layout via ORG pin - optimizes byte-aligned vs word-aligned access in host firmware |
| Self-timed write cycle | No external timing control needed; DO reports BUSY/READY status - simplifies host software state machine |
| Industrial temperature grade | −40°C to +85°C operation - eliminates derating concerns in enclosed industrial enclosures |
| ESD protection | >4000V HBM - withstands handling and board-level ESD events without external protection diodes |
| Low standby current | 10 µA max at 2.5V - enables battery-backed operation in always-on monitoring nodes |
Applications
| Industrial Sensor Calibration | Embedded System Boot Configuration |
|---|---|
Use Scenario: Storing factory-trimmed ADC offset/gain coefficients and sensor linearization tables in pressure transmitters. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during power-up initialization and runtime correction routines. Use Value: Eliminates need for external trimming components and enables field recalibration without hardware modification. |
Use Scenario: Holding bootloader configuration flags (e.g., UART baud rate, boot source priority, watchdog timeout) in programmable logic controllers. IC Role / Device Role / Timing Role: Early-boot configuration register providing deterministic startup behavior before main firmware executes. Use Value: Enables unified hardware design across multiple product SKUs via software-defined boot behavior. |
| Smart Meter Security Keys | Motor Drive Parameter Storage |
Use Scenario: Securing AES encryption keys and device identity certificates in utility smart meters with tamper detection. IC Role / Device Role / Timing Role: Tamper-resistant key vault accessed only during secure boot and authenticated firmware update. Use Value: Meets IEC 62056-21 and DLMS/COSEM security requirements using on-chip write-protection logic. |
Use Scenario: Retaining motor-specific tuning parameters (PID gains, current limits, encoder offsets) across power cycles in HVAC inverter drives. IC Role / Device Role / Timing Role: Persistent parameter store loaded at drive enable to ensure repeatable torque response. Use Value: Reduces commissioning time by eliminating manual re-entry of motor-specific settings after replacement. |
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, 2.5V–5.5V, 20 MHz clock, 5 ms write cycle | Higher density and faster interface; requires SPI controller instead of generic GPIO bit-banging | Select when migrating to SPI-based platforms or requiring >1Kbit capacity |
| CAT93C46VI-GT3 | 1K-bit 3-wire EEPROM, 2.5V–5.5V, same pinout (SOIC-8), but standard (non-rotated) layout | Identical functionality and timing; differs only in pin 1/2 assignment (CS/VCC vs DC/VCC) | Choose for new designs where standard SOIC orientation simplifies PCB routing |
Compared with M95128-WMN6TP and CAT93C46VI-GT3, the AT93C46R-10SI-2.5 offers rotated SOIC compatibility for legacy board reuse and minimal GPIO overhead for 3-wire bit-banged control, while maintaining industrial temperature support and proven field reliability in configuration-critical roles.
Availability
AT93C46R-10SI-2.5 is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded boot configuration, smart meter security key storage, and motor drive parameter retention requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for AT93C46R-10SI-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 support for the legacy AT93C series. The company specializes in microcontrollers, analog, and nonvolatile memory solutions for industrial, automotive, and consumer markets.
The AT93C46R-10SI-2.5 belongs to Microchip's serial EEPROM product line, designed specifically for low-pin-count, low-power configuration storage in resource-constrained embedded systems where simplicity, reliability, and wide voltage operation are critical.
FAQ
What does the "R" suffix in AT93C46R-10SI-2.5 indicate?
The "R" denotes rotated pinout in the 8-lead SOIC package: Pin 1 is DC (not CS), Pin 2 is VCC (not DC), and Pins 3–8 follow JEDEC rotation. This layout matches legacy board footprints requiring VCC adjacent to Pin 2. The AT93C46R-10SI-2.5 retains identical electrical specs and timing as non-R variants.
Can AT93C46R-10SI-2.5 operate reliably at 2.5V supply?
Yes - the AT93C46R-10SI-2.5 is explicitly rated for 2.5V to 5.5V operation. At 2.5V, it supports up to 500 kHz clock frequency and maintains full 1 million write cycle endurance and 100-year data retention. Standby current is 10 µA max at 2.5V, enabling ultra-low-power applications.
How is memory organization selected on AT93C46R-10SI-2.5?
Memory organization (128×8 or 64×16) is controlled by the ORG pin: logic high selects x16 mode, logic low selects x8 mode. If left unconnected, an internal ~1 MΩ pull-up forces x16 mode. This selection is static and must be set before issuing READ/WRITE commands - the AT93C46R-10SI-2.5 does not support dynamic reconfiguration.
Does AT93C46R-10SI-2.5 require an external erase cycle before writing?
No - the AT93C46R-10SI-2.5 performs automatic erase-before-write internally. Each WRITE instruction erases the target location prior to programming. No separate ERASE command is needed unless overwriting specific addresses without full data reload. The self-timed write cycle (≤10 ms) includes both erase and program phases.
What is the purpose of the DC pin on AT93C46R-10SI-2.5?
The DC (Don't Connect) pin on AT93C46R-10SI-2.5 has no internal connection and must remain unconnected - neither tied to VCC nor GND. In rotated SOIC layout, it occupies Pin 1 position to maintain mechanical compatibility with standard SOIC footprints while relocating VCC to Pin 2. Connecting DC may cause undefined behavior or damage.
AT93C46R-10SI-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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT93C46R-10SI-2.5 FAQ
1.How can I place an order for AT93C46R-10SI-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46R-10SI-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 AT93C46R-10SI-2.5 reliable?
The price and inventory of AT93C46R-10SI-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 AT93C46R-10SI-2.5 is usually 5 days.
3.What payment methods are accepted for AT93C46R-10SI-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46R-10SI-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46R-10SI-2.5?
AT93C46R-10SI-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46R-10SI-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 AT93C46R-10SI-2.5?
For technical support, including AT93C46R-10SI-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46R-10SI-2.5 requirements.
6.How does Aetrix verify that AT93C46R-10SI-2.5 is sourced from the original manufacturer or authorized distributors?
All AT93C46R-10SI-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 AT93C46R-10SI-2.5 meets industry standards.
7.What is the process for return or replacement of AT93C46R-10SI-2.5?
All AT93C46R-10SI-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46R-10SI-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 AT93C46R-10SI-2.5 part is unused and in its original packaging.
Return procedure for AT93C46R-10SI-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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