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Microchip Technology 93AA56BXT-I/SN
- Part No.:
- 93AA56BXT-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93AA56BXT-I/SN.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,868
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Product details
Overview
93AA56BXT-I/SN from Microchip Technology Inc. is a 2 Kbit low-voltage serial EEPROM with fixed 128 × 16-bit organization, Microwire-compatible 3-wire interface (CS/CLK/DI/DO), and industrial temperature range (–40°C to +85°C). It features self-timed erase/write cycles, automatic ERAL before WRAL, power-on/off data protection, and 1,000,000 endurance cycles. Used for configuration storage in microcontroller-based embedded systems requiring nonvolatile memory with minimal pin count.
For engineers reviewing the 93AA56BXT-I/SN datasheet, 93AA56BXT-I/SN pinout, 93AA56BXT-I/SN application, or 93AA56BXT-I/SN equivalent, key selection criteria include VCC range (1.8–5.5 V), 16-bit word access, Ready/Busy status via DO pin, sequential read capability, and compatibility with legacy Microwire controllers in space-constrained designs.
Technical Context
The 93AA56BXT-I/SN implements a synchronous serial Microwire interface with start-bit detection, opcode-driven command set (READ/WRITE/ERASE/ERAL/WRAL/EWEN/EWDS), and internal address counter for sequential read. It uses CMOS technology optimized for low-power operation and includes on-chip voltage monitoring for power-fail protection.
Unlike C-versions, this 'B' variant lacks an ORG pin-memory is permanently configured as 128 × 16-bit. All programming operations require prior EWEN execution, and write cycles are self-timed (6 ms typical), with DO pin providing real-time Ready/Busy feedback during erase/write/WRAL operations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (128 words × 16 bits) - supports compact firmware parameter storage without external address latching |
| VCC range | 1.8 V to 5.5 V - enables direct interfacing with 1.8 V, 3.3 V, and 5 V logic domains |
| Interface | 3-wire Microwire (CS/CLK/DI/DO) - reduces MCU GPIO usage and PCB routing complexity |
| Endurance | 1,000,000 erase/write cycles - ensures long-term reliability in field-updatable systems |
| Data retention | 200 years at 25°C - guarantees configuration integrity over product lifetime without refresh |
| Write cycle time | 6 ms max (TWC) - defines minimum inter-write interval for burst configuration updates |
| Operating temp | –40°C to +85°C (Industrial grade) - validated for deployment in industrial control and automotive cabin modules |
Pinout & Package
93AA56BXT-I/SN is packaged in an 8-lead SOIC (SN) with standard 150-mil body width and Pb-free Matte Tin finish. Pin 1 is CS, pin 2 is CLK, pin 3 is DI, pin 4 is DO, pin 5 is VSS, pin 6 is NC (no internal connection), pin 7 is NC, and pin 8 is VCC. The absence of ORG pin confirms fixed 16-bit organization.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select | Active-high enable; must be held low ≥250 ns between commands; initiates self-timed write on falling edge |
| CLK (Pin 2) | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcode/address/data; stoppable mid-sequence |
| DI (Pin 3) | Data Input | Receives start bit, instruction opcodes, addresses, and write data; requires no pull-up when shared with DO |
| DO (Pin 4) | Data Output / Status | Outputs read data or Ready/Busy signal (low = busy); enters High-Z on CS falling edge |
| VSS (Pin 5) | Ground | Reference for all I/O and internal circuitry; must be low-impedance connection |
| NC (Pin 6) | No Connection | Not bonded internally; must remain unconnected or tied to VSS per layout best practice |
| NC (Pin 7) | No Connection | Not bonded internally; must remain unconnected or tied to VSS per layout best practice |
| VCC (Pin 8) | Power Supply | Supplies core logic and memory array; internal POR triggers at ~1.5 V; requires local 0.1 µF decoupling |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control or polling delay loops in host firmware |
| Automatic ERAL before WRAL | Guarantees full-array readiness for bulk writes without separate erase command sequence |
| Ready/Busy status on DO | Enables efficient host-side status polling without dedicated interrupt lines or additional pins |
| Power-on/off data protection | Hardware-level lockout prevents corruption during brown-out or reset transitions |
| Sequential read mode | Reduces command overhead by auto-incrementing address across consecutive reads |
Applications
| Motor Control Configuration | Smart Sensor Calibration Data |
|---|---|
Use Scenario: Storing motor phase timing offsets, current limits, and PID coefficients in BLDC driver modules. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during boot and runtime re-tuning. Use Value: Enables field calibration persistence across power cycles without MCU flash wear or external backup battery. | Use Scenario: Retaining factory-trimmed sensor gain/offset values and linearization tables in industrial pressure transmitters. IC Role / Device Role / Timing Role: Dedicated calibration memory mapped via Microwire to sensor interface ASIC. Use Value: Maintains measurement accuracy over 200-year data retention without recalibration infrastructure. |
| IoT Edge Device Identity | Industrial HMI Display Settings |
Use Scenario: Securing unique device identifiers, TLS certificate fingerprints, and secure boot keys in cellular IoT gateways. IC Role / Device Role / Timing Role: Tamper-resistant identity store accessed only during secure boot and TLS handshake initialization. Use Value: Provides hardware-backed root-of-trust foundation using 1M-cycle endurance for infrequent but critical writes. | Use Scenario: Saving user-adjusted brightness, contrast, language, and alarm thresholds in panel-mounted HMIs. IC Role / Device Role / Timing Role: Persistent UI state memory updated asynchronously during menu navigation. Use Value: Delivers instant UI restoration after power loss using low-quiescent ICCS (≤5 µA) to extend backup capacitor hold-up time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC56B-I/SN | VCC range 2.5–5.5 V; identical 128×16 organization and pinout; same SOIC-8 package | Requires minimum 2.5 V supply; not suitable for 1.8 V systems where 93AA56BXT-I/SN operates | Select 93LC56B-I/SN only if system VCC ≥2.5 V and higher noise immunity at VCC >2.5 V is prioritized |
| AT25020B-MAHL-T | 2 Kbit SPI interface (4-wire), 1.8–5.5 V, 128×16 organization, SOIC-8; no Ready/Busy pin - relies on WIP flag polling | Lacks DO-based Ready/Busy signaling; requires SPI master support instead of Microwire | Choose AT25020B-MAHL-T only when migrating to SPI architecture or needing faster clock rates (up to 20 MHz) |
Compared with 93LC56B-I/SN, the 93AA56BXT-I/SN extends low-voltage operation down to 1.8 V while retaining identical timing and command structure; versus AT25020B-MAHL-T, it preserves Microwire compatibility and hardware-ready signaling but trades off maximum clock speed for deterministic timing predictability.
Availability
93AA56BXT-I/SN is available at Aetrix Electronics and suitable for motor control configuration, smart sensor calibration, IoT device identity, and industrial HMI display settings requiring stable component supply across extended production lifecycles.
Supply support for 93AA56BXT-I/SN 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.
The 93XX series EEPROMs were designed specifically for low-pin-count, low-power nonvolatile storage in resource-constrained embedded systems, emphasizing Microwire compatibility, wide VCC tolerance, and robust data retention.
FAQ
What is the memory organization of the 93AA56BXT-I/SN?
The 93AA56BXT-I/SN has a fixed 128 × 16-bit organization (2 Kbit total), with no ORG pin-unlike 'C' variants. This means it always operates in 16-bit word mode, supporting efficient storage of 16-bit configuration parameters without software bit-packing. The 93AA56BXT-I/SN does not support 8-bit access; all read/write operations transfer 16 bits per address.
Does the 93AA56BXT-I/SN require an external pull-up resistor on the DO pin?
No, the 93AA56BXT-I/SN does not require an external pull-up on DO. The DO pin actively drives high or low during read/status cycles and enters High-Z when CS is low or during non-read operations. A pull-up may cause bus contention if DI and DO are shorted; Microchip recommends a series resistor if bidirectional wiring is used, but standalone DO operation needs no pull-up.
How does the 93AA56BXT-I/SN handle power loss during a write cycle?
The 93AA56BXT-I/SN incorporates hardware power-loss protection: if VCC drops below ~1.5 V during erase/write, the internal circuitry halts the operation and preserves existing data. No partial writes occur. Once VCC recovers above threshold, the device resumes normal operation-no recovery sequence or error flag is needed. This behavior is intrinsic to the 93AA56BXT-I/SN's design and requires no host intervention.
Can the 93AA56BXT-I/SN be used interchangeably with the 93AA56A-I/SN?
No, the 93AA56BXT-I/SN is not interchangeable with the 93AA56A-I/SN. They differ in memory organization: 93AA56BXT-I/SN is 128 × 16-bit, while 93AA56A-I/SN is 256 × 8-bit. Addressing, data width, and instruction timing (e.g., READ requires 20 vs. 27 clock cycles) are incompatible. Software and hardware must be redesigned to accommodate the 93AA56BXT-I/SN's 16-bit word structure.
What is the purpose of the NC pins on the 93AA56BXT-I/SN SOIC package?
Pins 6 and 7 on the 93AA56BXT-I/SN SOIC package are designated NC (No Connection) and are not bonded to the die. They must remain unconnected in the PCB layout. Microchip specifies these pins as NC-not as reserved or future-use-so tying them to VSS or VCC risks unintended electrical interaction. Their presence accommodates family-wide pinout consistency across A/B/C variants, but the 93AA56BXT-I/SN itself has no internal function assigned to them.
93AA56BXT-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not 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:
- 8-SOIC
93AA56BXT-I/SN FAQ
1.How can I place an order for 93AA56BXT-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA56BXT-I/SN 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 93AA56BXT-I/SN reliable?
The price and inventory of 93AA56BXT-I/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93AA56BXT-I/SN is usually 5 days.
3.What payment methods are accepted for 93AA56BXT-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA56BXT-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA56BXT-I/SN?
93AA56BXT-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA56BXT-I/SN 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 93AA56BXT-I/SN?
For technical support, including 93AA56BXT-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA56BXT-I/SN requirements.
6.How does Aetrix verify that 93AA56BXT-I/SN is sourced from the original manufacturer or authorized distributors?
All 93AA56BXT-I/SN 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 93AA56BXT-I/SN meets industry standards.
7.What is the process for return or replacement of 93AA56BXT-I/SN?
All 93AA56BXT-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93AA56BXT-I/SN, 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 93AA56BXT-I/SN part is unused and in its original packaging.
Return procedure for 93AA56BXT-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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