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Microchip Technology AT93C46-10SU-2.7
- Part No.:
- AT93C46-10SU-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C46-10SU-2.7.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,983
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Product details
Overview
AT93C46-10SU-2.7 from Microchip Technology (formerly Atmel) is a 1K-bit three-wire serial EEPROM with user-selectable 128 × 8 or 64 × 16 organization, operating from 2.7V to 5.5V, featuring 2 MHz clock rate at 5V, 10 ms max self-timed write cycle, and automotive-grade reliability for industrial control and embedded configuration storage.
For engineers reviewing the AT93C46-10SU-2.7 datasheet, AT93C46-10SU-2.7 pinout, AT93C46-10SU-2.7 application, or AT93C46-10SU-2.7 equivalent, key selection criteria include low-voltage operation (2.7–5.5V), dual memory organization via ORG pin, three-wire interface compatibility, endurance of 1 million write cycles, and TSSOP-8 packaging with lead-free/halogen-free compliance.
Technical Context
The AT93C46-10SU-2.7 implements a synchronous three-wire serial interface (CS/SK/DI/DO) with start-bit–driven instruction decoding and supports READ, WRITE, ERASE, EWEN, EWDS, ERAL, and WRAL commands. Its internal organization is dynamically selected by the ORG pin state-logic high for 64 × 16 mode, ground for 128 × 8 mode-and it requires no external erase cycle prior to write.
Operation is enabled only when CS is asserted low; DO outputs Ready/Busy status during write/erase if CS is raised after tCS ≥ 250 ns. The device features internal pull-up on ORG (enabling x16 default when unconnected), but this behavior is not supported in 1.8V variants-though AT93C46-10SU-2.7 is a 2.7V version and fully supports it.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 × 8 or 64 × 16 words), enabling compact nonvolatile storage for calibration data or device IDs |
| Supply Voltage | 2.7V to 5.5V - compatible with 3.3V and 5V logic systems without level shifting |
| Max Clock Rate | 2 MHz at VCC = 5V - supports fast serial access in time-critical boot or initialization sequences |
| Write Cycle Time | 10 ms maximum - deterministic timing enables predictable firmware delay handling |
| Endurance | 1 million write cycles - suitable for field-updatable parameters with frequent reprogramming |
| Data Retention | 100 years at 25°C - ensures long-term integrity of stored configuration across product lifetime |
| Operating Temp | −40°C to +85°C - qualified for industrial and automotive under-hood environments |
Pinout & Package
AT93C46-10SU-2.7 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 gull-wing leads and pin 1 indicator in top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for serial communication; must be held low during instruction execution and address/data transfer |
| SK | Serial Clock | Synchronizes all data transfers; rising edge clocks DI input and DO output |
| DI | Data Input | Receives instruction opcodes, addresses, and write data; sampled on SK rising edge |
| DO | Data Output | Serially outputs read data or Ready/Busy status; high-Z when CS is high |
| VCC | Power Supply | 2.7V–5.5V supply input; decoupling capacitor required near pin for noise immunity |
| GND | Ground | Reference return path for all signals and power; must be low-impedance connection |
| ORG | Organization Select | Logic high → 64 × 16 mode; ground → 128 × 8 mode; internal ~1 MΩ pull-up enables x16 default when floating |
| DC | Don't Connect | No internal connection; must remain unconnected and un-biased to avoid leakage or ESD risk |
Key Features
| Feature | Design Value |
|---|---|
| User-selectable memory organization | Hardware-configurable 128 × 8 or 64 × 16 layout via ORG pin-eliminates need for software remapping or external logic |
| Three-wire serial interface | Minimal GPIO usage (CS/SK/DI/DO) reduces MCU pin count and PCB routing complexity versus SPI or I²C |
| Self-timed write cycle | No external timing control needed; DO status feedback allows host to poll completion without fixed delays |
| High-reliability nonvolatile storage | 1M write cycles and 100-year retention validated per JEDEC standards-suitable for mission-critical configuration storage |
| Automotive-grade qualification | Qualified to −40°C to +85°C with lead-free/halogen-free packaging-meets AEC-Q100 stress test requirements for industrial use |
Applications
| Industrial PLC Configuration Storage | Consumer Appliance Calibration Data |
|---|---|
Use Scenario: Storing sensor calibration coefficients, I/O mapping tables, and runtime configuration in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed during boot and runtime via three-wire interface; ORG pin set to x16 for compact 64-word address space. Use Value: Enables field recalibration without firmware update; 1M endurance supports weekly recalibration over 20+ years. | Use Scenario: Holding factory-set temperature profiles, motor timing curves, and user preference defaults in washing machines and HVAC controllers. IC Role / Device Role / Timing Role: Serial EEPROM interfaced to 8-bit MCU; x8 organization used for byte-aligned access to 128-byte parameter set. Use Value: Eliminates need for battery-backed RAM; 100-year retention ensures settings persist across product lifecycle without maintenance. |
| Automotive Body Control Module (BCM) | Medical Diagnostic Equipment Settings |
Use Scenario: Storing door lock logic states, mirror position presets, and lighting configuration in BCMs operating across extended temperature ranges. IC Role / Device Role / Timing Role: Automotive-grade serial EEPROM with −40°C to +85°C operation; accessed during wake-up sequence via dedicated MCU GPIOs. Use Value: Meets AEC-Q100 ambient requirements; TSSOP-8 package fits tight board spaces while maintaining thermal reliability. | Use Scenario: Preserving user-defined measurement thresholds, alarm limits, and calibration offsets in portable ultrasound and ECG devices. IC Role / Device Role / Timing Role: Low-power serial EEPROM powered from 3.3V rail; standby current <10 µA at 2.7V minimizes battery drain during sleep mode. Use Value: Supports >5000 power cycles before first write wear-out; DO status polling avoids unnecessary MCU wake-ups during writes. |
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, 5V tolerant, 20 MHz max clock, 5 ms write cycle | Requires SPI controller instead of generic GPIO bit-banging; higher density but larger footprint (SO8) | Select when system already uses SPI peripherals and needs >1K capacity with faster throughput |
| CAT93C46VI-GT3 | Pin-compatible 1K EEPROM, same 2.7–5.5V range, identical TSSOP-8 package, but with enhanced ESD rating (4 kV HBM) | No functional or timing differences; drop-in replacement with improved robustness in noisy environments | Prefer for new designs requiring higher ESD immunity without layout or firmware changes |
Compared with M95128-WMN6TP and CAT93C46VI-GT3, the AT93C46-10SU-2.7 offers unique flexibility in memory organization (x8/x16) and minimal GPIO interface, making it optimal for resource-constrained microcontrollers where SPI is unavailable or pin count is critical-while CAT93C46VI-GT3 provides direct upgrade path with enhanced ruggedness.
Availability
AT93C46-10SU-2.7 is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, consumer appliance calibration storage, and medical diagnostic equipment requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for AT93C46-10SU-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 broad industrial and automotive qualification expertise.
The AT93C46-10SU-2.7 belongs to Microchip's legacy serial EEPROM family designed for cost-sensitive, low-pin-count embedded systems requiring reliable, low-voltage configuration storage with hardware-selectable memory layout.
FAQ
What is the memory organization of AT93C46-10SU-2.7 and how is it selected?
The AT93C46-10SU-2.7 supports two memory organizations: 128 × 8 (128 words × 8 bits) or 64 × 16 (64 words × 16 bits). Selection is controlled by the ORG pin: logic high (VCC) selects x16 mode, ground selects x8 mode. When left unconnected, the internal ~1 MΩ pull-up defaults to x16 mode-confirmed in the AT93C46-10SU-2.7 datasheet for 2.7V operation.
Does AT93C46-10SU-2.7 require an external erase cycle before writing?
No, AT93C46-10SU-2.7 does not require a separate erase cycle. Each WRITE instruction automatically erases the target location before programming, and the entire process is self-timed within the 10 ms maximum write cycle. The ERASE instruction is optional and used only for selective location clearing independent of write operations.
What is the function of the DC pin on AT93C46-10SU-2.7?
The DC (Don't Connect) pin on AT93C46-10SU-2.7 has no internal connection and must remain unconnected and un-biased. It is not tied to VCC, GND, or any internal node. Connecting DC risks introducing leakage paths or ESD susceptibility, and violates the absolute maximum ratings specified in the AT93C46-10SU-2.7 datasheet.
Can AT93C46-10SU-2.7 operate reliably at 3.3V supply voltage?
Yes, AT93C46-10SU-2.7 is fully specified for operation from 2.7V to 5.5V, including 3.3V nominal systems. At VCC = 3.3V, AC characteristics such as tSKH/tSKL remain compliant (≥250 ns), and DC parameters-including VIH/VIL thresholds and IOL/IOH drive-meet guaranteed limits per Table 3 and Table 4 of the AT93C46-10SU-2.7 datasheet.
How is Ready/Busy status monitored during a write cycle on AT93C46-10SU-2.7?
During a write cycle, AT93C46-10SU-2.7 outputs Ready/Busy status on the DO pin: logic '0' indicates programming in progress; logic '1' indicates completion. To read status, CS must be brought high after being held low for ≥250 ns (tCS), and DO is sampled on the next SK rising edge-per the timing diagrams in the AT93C46-10SU-2.7 datasheet (Figures 6 and 8).
AT93C46-10SU-2.7 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:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT93C46-10SU-2.7 FAQ
1.How can I place an order for AT93C46-10SU-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46-10SU-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 AT93C46-10SU-2.7 reliable?
The price and inventory of AT93C46-10SU-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 AT93C46-10SU-2.7 is usually 5 days.
3.What payment methods are accepted for AT93C46-10SU-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46-10SU-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46-10SU-2.7?
AT93C46-10SU-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46-10SU-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 AT93C46-10SU-2.7?
For technical support, including AT93C46-10SU-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46-10SU-2.7 requirements.
6.How does Aetrix verify that AT93C46-10SU-2.7 is sourced from the original manufacturer or authorized distributors?
All AT93C46-10SU-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 AT93C46-10SU-2.7 meets industry standards.
7.What is the process for return or replacement of AT93C46-10SU-2.7?
All AT93C46-10SU-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46-10SU-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 AT93C46-10SU-2.7 part is unused and in its original packaging.
Return procedure for AT93C46-10SU-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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