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Microchip Technology 93AA56BT-I/OT
- Part No.:
- 93AA56BT-I/OT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SOT-23-6
- Datasheet:
-
93AA56BT-I/OT.pdf
- Description:
- IC EEPROM 2KBIT MIC WIRE SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:6,153
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Product details
Overview
93AA56BT-I/OT from Microchip Technology Inc. is a 2 Kbit (256 × 8-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 1.8–5.5 V supply range, and industrial temperature rating (–40°C to +85°C). It features self-timed erase/write cycles, automatic erase-all-before-write-all (ERAL/WRAL), and Ready/Busy status signaling via DO pin. Used for nonvolatile parameter storage in embedded microcontroller systems requiring robust data retention.
For engineers reviewing the 93AA56BT-I/OT datasheet, 93AA56BT-I/OT pinout, 93AA56BT-I/OT application, or 93AA56BT-I/OT equivalent, this page delivers verified electrical specs (e.g., 3 MHz max clock at 4.5–5.5 V), package-confirmed SOT-23-6 footprint, endurance (1M cycles), data retention (>200 years), and functional alternatives for memory upgrade or sourcing continuity.
Technical Context
The 93AA56BT-I/OT implements a synchronous serial Microwire interface with CS, CLK, and DI/DO pins - no ORG pin (A-version), fixed 8-bit word organization. It uses internal auto-erase before write, supports sequential read, and provides hardware-level power-on/off data protection via built-in voltage detect (1.5 V threshold).
Its operation relies on Start-bit detection (CS high + DI high on first CLK rising edge), followed by opcode/address/data clocked on CLK rising edges. DO serves dual role: data output during READ and Ready/Busy status polling during ERASE/WRITE - active-high indicates completion, low indicates in-progress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8-bit) - fixed x8 organization; no ORG pin; supports 256-byte parameter tables or calibration data sets. |
| VCC Range | 1.8 V to 5.5 V - enables direct interfacing with 1.8 V, 3.3 V, and 5 V logic domains without level shifters. |
| Clock Frequency | Up to 3 MHz at VCC ≥ 4.5 V - supports fast configuration loading in real-time control loops. |
| Write Cycle Time | 6 ms typical - self-timed; eliminates need for external timing control or software delays between writes. |
| Endurance | 1,000,000 erase/write cycles - suitable for firmware logging, counter persistence, or field-updatable settings. |
| Data Retention | Greater than 200 years at 25°C - ensures long-term reliability in unattended or maintenance-free deployments. |
| Interface | 3-wire Microwire-compatible (CS, CLK, DI/DO) - minimal GPIO usage; compatible with legacy PIC® MCU peripherals. |
Pinout & Package
93AA56BT-I/OT is housed in a Pb-free 6-lead SOT-23 package (JEDEC MO-178AA), measuring 2.9 mm × 1.6 mm × 1.1 mm, with gull-wing leads and exposed pad optional (not electrically connected per datasheet).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: DO | Data Output / Ready-Busy Status | Tri-state output; drives high-Z when idle, outputs data on READ, asserts low during erase/write until complete. |
| 2: VSS | Ground Reference | Primary return path for all internal circuitry; must be low-impedance connection to system GND plane. |
| 3: DI | Data Input | Serial input for opcodes, addresses, and write data; synchronized to CLK rising edge; may share trace with DO if series resistor used. |
| 4: VCC | Power Supply | 1.8–5.5 V supply; includes internal POR circuit triggered at ~1.5 V; decoupling capacitor (0.1 µF) required near pin. |
| 5: CS | Chip Select | Active-high enable; device enters standby when low; minimum 250 ns low time required between commands. |
| 6: CLK | Serial Clock | Input clock for synchronous data transfer; rising edge clocks all bits; can be paused mid-sequence without error. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed Erase/Write | Eliminates external timing circuitry or software wait loops; internal state machine manages full auto-erase + program sequence. |
| Automatic ERAL before WRAL | Ensures clean memory array prior to bulk write; prevents partial overwrite corruption without host-side erase command sequencing. |
| Ready/Busy Status via DO | Enables polling-based flow control instead of fixed delays; reduces worst-case latency and improves system responsiveness. |
| Power-On/Off Data Protection | Hardware lockout below 1.5 V VCC prevents inadvertent writes during brown-out or power ramp; no software intervention needed. |
| 1,000,000 Endurance Cycles | Supports daily reconfiguration over 27+ years; validated at 5.0 V/25°C per Total Endurance™ characterization model. |
Applications
| Industrial Sensor Calibration | Consumer Appliance Settings |
|---|---|
|
Use Scenario: Storing factory-trimmed sensor offset/gain coefficients and user-adjusted thresholds in HVAC controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed at boot and during field recalibration; serial interface minimizes MCU pin count. Use Value: Maintains accuracy across power cycles and thermal drift; 200-year retention ensures lifetime calibration integrity without battery backup. |
Use Scenario: Saving user preferences (temperature setpoints, timer durations, display brightness) in smart refrigerators and washing machines. IC Role / Device Role / Timing Role: Low-power parameter store interfaced to 8-bit MCU via 3-wire SPI-like bus; accessed only during UI interaction or power-up. Use Value: Enables instant recall of settings after unplugging; 1.8 V operation allows direct connection to 3.3 V MCU I/O without level translation. |
| Medical Device Configuration | Automotive Body Control Module |
|
Use Scenario: Storing regulatory-compliant device ID, calibration logs, and safety-critical operational limits in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory for audit trails and firmware versioning; accessed under controlled bootloader supervision. Use Value: Meets IEC 62304 data integrity requirements; 1M-cycle endurance supports frequent log updates during clinical use. |
Use Scenario: Holding door lock actuator profiles, mirror position presets, and lighting dimming curves in vehicle BCMs. IC Role / Device Role / Timing Role: Dedicated configuration memory for CAN-connected subsystems; isolated from main MCU bus to reduce EMI coupling. Use Value: Industrial-grade –40°C to +85°C operation ensures reliability in under-hood environments; RoHS/Pb-free compliance meets automotive standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC56BT-I/OT | Same 2 Kbit x8 organization, SOT-23-6 package, but 2.5–5.5 V VCC range; lacks 1.8 V support. | Not suitable for 1.8 V systems; otherwise identical instruction set and timing. | Select when system VCC is guaranteed ≥2.5 V and lower-voltage operation is unnecessary. |
| AT25020B-MAHL-T | 2 Kbit SPI EEPROM (4-wire), 1.8–5.5 V, 20 MHz max clock, 1M endurance, same SOT-23-6 footprint. | Requires SPI master with 4-wire interface; incompatible Microwire protocol; higher speed but different command structure. | Choose for designs already using SPI peripherals and needing faster access; requires firmware rewrite for command handling. |
Compared with 93AA56BT-I/OT, the 93LC56BT-I/OT offers identical functionality above 2.5 V but excludes ultra-low-voltage operation, while the AT25020B-MAHL-T delivers higher throughput via SPI but mandates interface and driver changes - making the 93AA56BT-I/OT optimal for cost-sensitive, 1.8 V–compatible Microwire-based legacy systems.
Availability
93AA56BT-I/OT is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer appliance settings, medical device configuration, and automotive body control modules requiring stable component supply across extended product lifecycles.
Supply support for 93AA56BT-I/OT 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 Inc. is a leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93AA56 family was designed specifically for low-power, nonvolatile memory applications in resource-constrained embedded systems, emphasizing compatibility with legacy Microwire interfaces and robustness across wide voltage and temperature ranges.
FAQ
What is the memory organization of the 93AA56BT-I/OT?
The 93AA56BT-I/OT is an A-version device with fixed 256 × 8-bit (2 Kbit) organization and no ORG pin. It does not support x16 mode - unlike C-version variants - and always operates in 8-bit word format, simplifying address decoding and data alignment in 8-bit MCU systems.
Does the 93AA56BT-I/OT require an external pull-up resistor on the DO pin?
No, the 93AA56BT-I/OT does not require an external pull-up on DO. Its DO pin has an active push-pull driver during READ and Ready/Busy assertion. However, if DI and DO are shorted (shared-bus configuration), a series resistor (~1 kΩ) is recommended to prevent bus conflict during dummy-zero read phases.
What is the minimum VCC required for reliable operation of the 93AA56BT-I/OT?
The 93AA56BT-I/OT incorporates internal power-on reset (POR) that inhibits all operations below ~1.5 V. Reliable read/write functionality begins at 1.8 V, and the device is fully specified across 1.8–5.5 V - enabling direct integration into 1.8 V logic domains without regulators or level shifters.
How is the Ready/Busy status monitored on the 93AA56BT-I/OT?
Ready/Busy status is monitored by polling the DO pin: after initiating an ERASE or WRITE command, bring CS high for ≥250 ns, then sample DO - low indicates ongoing operation, high confirms completion. The status remains valid until next CS low transition or Start bit detection.
Is the 93AA56BT-I/OT pin-compatible with other 93XX56 variants in SOT-23-6 package?
Yes, the 93AA56BT-I/OT shares identical SOT-23-6 pinout (DO-VSS-DI-VCC-CS-CLK) with 93LC56BT-I/OT and 93C56BT-I/OT. However, VCC range and POR threshold differ: 93AA56BT-I/OT supports 1.8–5.5 V (1.5 V POR), while 93LC56BT-I/OT is 2.5–5.5 V (1.5 V POR) and 93C56BT-I/OT is 4.5–5.5 V (3.8 V POR).
93AA56BT-I/OT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 128 x 16
- Memory Interface:
- Microwire
- Clock Frequency:
- 2 MHz
- Write Cycle Time - Word, Page:
- 6ms
- Access Time:
- -
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
93AA56BT-I/OT FAQ
1.How can I place an order for 93AA56BT-I/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA56BT-I/OT 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 93AA56BT-I/OT reliable?
The price and inventory of 93AA56BT-I/OT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93AA56BT-I/OT is usually 5 days.
3.What payment methods are accepted for 93AA56BT-I/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA56BT-I/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA56BT-I/OT?
93AA56BT-I/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA56BT-I/OT 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 93AA56BT-I/OT?
For technical support, including 93AA56BT-I/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA56BT-I/OT requirements.
6.How does Aetrix verify that 93AA56BT-I/OT is sourced from the original manufacturer or authorized distributors?
All 93AA56BT-I/OT 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 93AA56BT-I/OT meets industry standards.
7.What is the process for return or replacement of 93AA56BT-I/OT?
All 93AA56BT-I/OT units undergo pre-shipment inspection (PSI). If there is an issue with 93AA56BT-I/OT, 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 93AA56BT-I/OT part is unused and in its original packaging.
Return procedure for 93AA56BT-I/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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