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Microchip Technology AT93C56A-10TU-2.7
- Part No.:
- AT93C56A-10TU-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT93C56A-10TU-2.7.pdf
- Description:
- IC EEPROM 2KBIT 3-WIRE 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,189
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Product details
Overview
AT93C56A-10TU-2.7 from Microchip Technology (formerly Atmel) is a 2 Kbit serial EEPROM with three-wire interface, user-selectable 256 × 8 or 128 × 16 organization via ORG pin, 2.7–5.5 V supply range, 2 MHz max clock rate at 5 V, and self-timed write cycle ≤10 ms. It is used for configuration storage in industrial controllers, sensor calibration data retention, and boot parameter storage in embedded systems.
For engineers reviewing the AT93C56A-10TU-2.7 datasheet, AT93C56A-10TU-2.7 pinout, AT93C56A-10TU-2.7 application, or AT93C56A-10TU-2.7 equivalent, this page delivers verified electrical specs, package mapping to TSSOP-8, functional pin roles, real-world use cases, and two validated alternative parts with documented differences.
Technical Context
The AT93C56A-10TU-2.7 implements a synchronous three-wire serial interface (CS, SK, DI/DO) with instruction-based command set including READ, WRITE, ERASE, EWEN, and EWDS. Its internal organization is dynamically selected by the ORG pin voltage - high for 128 × 16, low for 256 × 8 - enabling flexible byte/word addressing without external logic.
Write operations require explicit Erase/Write Enable (EWEN) before programming; all writes are self-timed with Ready/Busy status reported on DO when CS is asserted post-command. The device supports sequential read with automatic address increment and dummy-bit suppression between words, reducing host overhead in burst-read scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8 or 128 × 16), enabling compact nonvolatile storage for small firmware patches or device IDs |
| Supply Voltage Range | 2.7 V to 5.5 V - compatible with 3.3 V and 5 V systems without level-shifting |
| Max Clock Frequency | 2 MHz at VCC = 5 V - supports fast configuration loading in time-critical boot sequences |
| Write Cycle Time | ≤10 ms - enables predictable timing budgeting for firmware update routines |
| Endurance & Retention | 1 million write cycles / 100 years data retention - suitable for field-updatable calibration tables |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial ambient environments |
| Interface Protocol | Three-wire serial (CS/SK/DI/DO) - minimal GPIO usage, no SPI hardware dependency |
Pinout & Package
AT93C56A-10TU-2.7 is packaged in an 8-lead Thin Shrink Small Outline Package (TSSOP-8), 3.0 mm × 4.4 mm body, 0.65 mm pitch, lead-free and RoHS-compliant per ordering code suffix "U".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must be held low during instruction execution and sampling; controls DO high-impedance state |
| SK | Serial Clock | Synchronous edge-triggered input; rising edge latches DI, falling edge clocks DO; max 2 MHz at 5 V |
| DI | Data Input | Serial command and address/data input; accepts Start Bit (1), Op Code, address, and payload bits |
| DO | Data Output | Open-drain output; returns read data, Ready/Busy status (logic 1 = ready), or high-Z when CS high |
| VCC | Power Supply | 2.7–5.5 V main supply; powers internal logic and memory array; decoupling capacitor required |
| GND | Ground | Reference return path for all signals and supply; must be low-impedance connection |
| ORG | Organization Select | Logic-high selects 128 × 16 mode; logic-low selects 256 × 8 mode; internal 1 MΩ pull-up defaults to x16 |
| NC | No Connect | Unbonded pin; must remain floating or tied to GND/VCC per PCB layout best practice - no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| User-selectable memory organization | Hardware-configurable 256 × 8 or 128 × 16 layout via ORG pin - eliminates need for software bit-packing |
| Self-timed write cycle | No external timing control needed; DO reports Ready/Busy status - simplifies host firmware state machine |
| Sequential read support | Automatic address increment and suppressed dummy bits between words - enables continuous data streaming |
| Low standby current | 6 µA typical at 2.7 V (ISB2) - extends battery life in always-on sensor nodes |
| Erase/Write protection | EWEN/EWDS instructions enforce intentional programming - prevents accidental overwrites during power transients |
Applications
| Industrial PLC Configuration Storage | Medical Sensor Calibration Data |
|---|---|
|
Use Scenario: Storing I/O mapping, scaling coefficients, and alarm thresholds in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent system parameters accessed at power-up and runtime. Use Value: Enables field reconfiguration without firmware reload; 1M endurance supports >10 years of daily parameter updates. |
Use Scenario: Retaining factory-calibrated offset/gain values for analog front-end sensors in portable diagnostic devices. IC Role / Device Role / Timing Role: Trusted data vault for precision analog calibration constants, read once per measurement cycle. Use Value: Eliminates recalibration drift over 100-year retention; low 2.7 V operation matches battery-powered sensor rails. |
| Consumer Appliance Boot Parameters | Automotive Body Control Module Settings |
|
Use Scenario: Saving user preferences (e.g., display brightness, language, timer defaults) in smart home appliances. IC Role / Device Role / Timing Role: Low-pin-count NV memory interfaced directly to MCU GPIOs, avoiding dedicated SPI peripheral use. Use Value: Reduces BOM cost vs. SPI flash; TSSOP-8 footprint fits tight space constraints in white-goods PCBs. |
Use Scenario: Storing seat/mirror position presets and lighting profiles in automotive interior modules. IC Role / Device Role / Timing Role: AEC-Q200-unqualified but widely deployed in non-safety-critical cabin electronics with −40°C to +85°C rating. Use Value: Proven reliability in thermal cycling environments; 2.7–5.5 V range accommodates vehicle battery fluctuations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT93C56A-10SU-2.7 | Same die, JEDEC SOIC-8 package (5.0 × 4.0 mm); 0.150" wide body; higher profile than TSSOP | Preferred where board-level rework or hand-soldering is required; less dense footprint than TSSOP | Select when SOIC handling infrastructure exists or thermal dissipation margin is critical |
| M95256-WMN6TP | 256 Kbit SPI EEPROM (32 K × 8); quad I/O capable; 5 MHz max clock; different command set and pinout | Higher density and faster interface, but requires SPI peripheral and additional GPIOs for hold/write-protect | Choose only if >2 Kbit capacity or SPI-native interface is mandatory; not drop-in compatible |
Compared with AT93C56A-10SU-2.7, the AT93C56A-10TU-2.7 offers 35% smaller PCB area and lower profile; versus M95256-WMN6TP, it reduces MCU pin count and firmware complexity but trades off capacity and speed - ideal for space-constrained, low-pin-count designs needing exactly 2 Kbit.
Availability
AT93C56A-10TU-2.7 is available at Aetrix Electronics and suitable for industrial PLC configuration storage, medical sensor calibration data retention, and consumer appliance boot parameter management requiring stable component supply across multi-year production cycles.
Supply support for AT93C56A-10TU-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 acquired Atmel in 2016 and maintains full product support, documentation, and manufacturing continuity for the AT93C56A family.
The AT93C56A series was designed for low-power, pin-efficient nonvolatile storage in resource-constrained embedded systems - emphasizing simplicity, reliability, and broad voltage compatibility over high speed or density.
FAQ
What is the maximum clock frequency supported by AT93C56A-10TU-2.7?
The AT93C56A-10TU-2.7 supports up to 2 MHz clock frequency when VCC = 5.0 V. At lower voltages (e.g., 2.7 V), the maximum clock rate drops to 1 MHz per AC characteristics table. This ensures reliable setup/hold timing margins across its full operating voltage range without requiring dynamic clock scaling in host firmware.
How does the ORG pin affect memory organization in AT93C56A-10TU-2.7?
In AT93C56A-10TU-2.7, the ORG pin selects internal memory organization: logic high (≥VCC × 0.7) configures 128 × 16 mode, logic low (≤VCC × 0.3) configures 256 × 8 mode. An unconnected ORG pin defaults to 128 × 16 via internal 1 MΩ pull-up. This hardware-selectable layout avoids software address translation overhead.
Is AT93C56A-10TU-2.7 pin-compatible with AT93C56A-10SU-2.7?
No - AT93C56A-10TU-2.7 uses TSSOP-8 (3.0 × 4.4 mm, 0.65 mm pitch), while AT93C56A-10SU-2.7 uses JEDEC SOIC-8 (5.0 × 4.0 mm, 1.27 mm pitch). Though both have identical pin functions and numbering, their footprints, solder profiles, and thermal characteristics differ significantly; PCB redesign is required for substitution.
What is the write endurance and data retention specification for AT93C56A-10TU-2.7?
The AT93C56A-10TU-2.7 guarantees 1 million write/erase cycles and 100 years of data retention at +25 °C. These values are characterized per JEDEC standards and apply across the full −40 °C to +85 °C operating temperature range, making it suitable for long-life industrial deployments where field updates occur infrequently but must remain reliable.
Does AT93C56A-10TU-2.7 require an external erase cycle before writing?
No - AT93C56A-10TU-2.7 performs automatic erase-before-write internally. Each WRITE instruction erases the target location prior to programming, eliminating separate ERASE commands for single-word updates. However, ERASE and ERAL instructions remain available for selective or bulk erasure when needed.
AT93C56A-10TU-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:
- 2Kbit
- Memory Organization:
- 256 x 8, 128 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
AT93C56A-10TU-2.7 FAQ
1.How can I place an order for AT93C56A-10TU-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C56A-10TU-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 AT93C56A-10TU-2.7 reliable?
The price and inventory of AT93C56A-10TU-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 AT93C56A-10TU-2.7 is usually 5 days.
3.What payment methods are accepted for AT93C56A-10TU-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C56A-10TU-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C56A-10TU-2.7?
AT93C56A-10TU-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C56A-10TU-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 AT93C56A-10TU-2.7?
For technical support, including AT93C56A-10TU-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C56A-10TU-2.7 requirements.
6.How does Aetrix verify that AT93C56A-10TU-2.7 is sourced from the original manufacturer or authorized distributors?
All AT93C56A-10TU-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 AT93C56A-10TU-2.7 meets industry standards.
7.What is the process for return or replacement of AT93C56A-10TU-2.7?
All AT93C56A-10TU-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C56A-10TU-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 AT93C56A-10TU-2.7 part is unused and in its original packaging.
Return procedure for AT93C56A-10TU-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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