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Microchip Technology 93AA56XT-I/SN
- Part No.:
- 93AA56XT-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93AA56XT-I/SN.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,236
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Product details
Overview
93AA56XT-I/SN from Microchip Technology Inc. is a 2 Kbit (256 x 8 or 128 x 16) low-voltage serial Microwire EEPROM with single-supply operation down to 1.8 V, 70 µA typical active read current at 1.8 V, and 2 µA standby current. It features ORG-pin-selectable memory organization, self-timed erase/write cycles, and industrial temperature range (–40°C to +85°C), used in embedded system configuration storage and sensor calibration data retention.
For engineers reviewing the 93AA56XT-I/SN datasheet, 93AA56XT-I/SN pinout, 93AA56XT-I/SN application, or 93AA56XT-I/SN equivalent, key selection criteria include 1.8 V minimum operating voltage, SOIC-8 narrow (SN) package compatibility, Microwire 3-wire serial interface timing compliance, and guaranteed 1 million erase/write cycles with >200-year data retention.
Technical Context
The 93AA56XT-I/SN implements a synchronous 3-wire Microwire interface with CS, CLK, and bidirectional DI/DO pins, supporting both x8 and x16 memory configurations via the ORG pin. Its internal logic includes auto-erase-before-write (ERAL before WRAL), power-on/off data protection, and Ready/Busy status polling via DO during programming.
It uses advanced CMOS technology to achieve ultra-low power consumption across 1.8–5.5 V supply range, with self-timed write cycles (4 ms typical per word), 8 ms ERAL, and 16 ms WRAL - all ensured at 5 V ±10%. The device enters EWDS mode on power-up and requires explicit EWEN before any programming operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8 or 128 × 16 bits), configurable via ORG pin |
| Supply voltage | 1.8 V to 5.5 V - enables direct interfacing with 1.8 V, 3.3 V, and 5 V microcontrollers |
| Active read current | 70 µA typical at 1.8 V - supports battery-powered or energy-constrained systems |
| Standby current | 2 µA typical at 1.8 V - minimizes quiescent power in always-on applications |
| Endurance | 1,000,000 erase/write cycles - ensures long-term reliability in frequent-update scenarios |
| Data retention | >200 years at 25°C - guarantees nonvolatile data integrity over product lifetime |
| Operating temperature | –40°C to +85°C (Industrial grade) - validated for harsh environmental deployment |
| Interface | Microwire 3-wire serial (CS, CLK, DI/DO) - compatible with legacy and resource-limited MCU GPIOs |
Pinout & Package
8-pin SOIC (SN) package per JEDEC MS-012 standard, 150 mil body width, surface-mount compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions to reset internal state |
| CLK | Serial Clock | Synchronizes opcode/address/data transfer on rising edge; stoppable at any point without corruption |
| DI | Data Input | Accepts Start bit, opcode, address, and write data; supports shared DI/DO bus with pull-up |
| DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); high-Z when inactive; requires pull-up for reliable status read |
| VSS | Ground | Reference return path for all digital and analog functions |
| ORG | Memory Organization | High = 128 × 16-bit; low = 256 × 8-bit; floating only allowed ≤1 MHz in x16 mode |
| NU | Not Utilized | No internal connection; must be left unconnected or tied to VSS/VCC per layout best practice |
| VCC | Power Supply | 1.8–5.5 V input; internal power-on reset inhibits programming until VCC >1.4 V |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply 1.8 V operation | Eliminates level-shifting circuitry when interfacing with modern ultra-low-voltage MCUs |
| Self-timed erase/write | Removes need for external timing control or software delay loops during programming |
| Automatic ERAL before WRAL | Guarantees full array erasure prior to bulk write, preventing partial-data corruption |
| Power-on/off data protection | Hardware-enforced lockout below 1.4 V prevents inadvertent writes during brown-out or startup |
| Sequential read function | Enables efficient block reads with continuous CS assertion, reducing transaction overhead |
| Industry-standard Microwire interface | Ensures drop-in compatibility with existing firmware drivers and hardware designs |
Applications
| Smart Meter Firmware Storage | Industrial Sensor Calibration Data |
|---|---|
Use Scenario: Storing metering firmware patches and tariff tables in electricity/water/gas meters deployed in field environments. IC Role / Device Role / Timing Role: Nonvolatile configuration and update storage with infrequent but critical writes and frequent reads. Use Value: 1.8 V operation allows direct integration with meter SoCs; 2 µA standby current extends battery life in battery-backed units. | Use Scenario: Retaining factory-calibrated coefficients and sensor offset values in industrial pressure/temperature transmitters. IC Role / Device Role / Timing Role: Persistent parameter storage accessed at boot and updated only during calibration or maintenance. Use Value: >200-year data retention ensures calibration validity across multi-decade equipment lifespans without periodic refresh. |
| Medical Device Configuration | Automotive Body Control Module Settings |
Use Scenario: Holding user-configurable therapy parameters and safety thresholds in portable infusion pumps and diagnostic monitors. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage of regulatory-compliant operational settings. Use Value: Hardware-based EWEN/EWDS commands prevent accidental overwrite during runtime; industrial temp range supports clinical environments. | Use Scenario: Saving seat/mirror/window position presets and lighting profiles in automotive BCMs. IC Role / Device Role / Timing Role: Low-power persistent memory for user preferences retained across ignition cycles. Use Value: 70 µA read current at 1.8 V minimizes parasitic drain on vehicle battery during sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93AA56C-I/SN | Same 2 Kbit Microwire EEPROM, but with updated process and enhanced ESD rating (6 kV HBM vs. 4 kV) | Recommended for new designs; identical pinout and instruction set; improved robustness in noisy environments | Select 93AA56C-I/SN for production releases requiring latest qualification and extended reliability |
| AT25020B-MAHL-T | 2 Kbit SPI interface (not Microwire), 2.5–5.5 V supply, 5 MHz max clock, no ORG pin - fixed 256 × 8 organization | Requires SPI-capable MCU; lacks ORG flexibility and 1.8 V support; higher speed but different protocol stack | Choose only if migrating to SPI infrastructure and 1.8 V operation is not required |
Compared with 93AA56XT-I/SN, the 93AA56C-I/SN offers identical functionality with superior ESD tolerance and lifecycle support, while the AT25020B-MAHL-T trades Microwire compatibility and low-voltage capability for higher throughput and broader vendor availability.
Availability
93AA56XT-I/SN is available at Aetrix Electronics and suitable for smart meter firmware storage, industrial sensor calibration data retention, and medical device configuration management requiring stable component supply and long-term obsolescence planning.
Supply support for 93AA56XT-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 microcontroller, mixed-signal, analog, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets with high-reliability silicon and development tools.
The 93AAxx family was designed specifically for cost-sensitive, low-power serial EEPROM applications requiring Microwire compatibility, wide supply voltage range, and industrial-grade temperature performance.
FAQ
What is the memory organization of the 93AA56XT-I/SN and how is it selected?
The 93AA56XT-I/SN supports two memory organizations: 256 × 8 bits or 128 × 16 bits. Selection is controlled by the ORG pin - tied to VCC for x16 mode, or to VSS for x8 mode. Floating ORG is permitted only at clock frequencies ≤1 MHz in x16 mode. This flexibility allows the 93AA56XT-I/SN to match varying MCU data bus widths without redesigning the memory map.
Does the 93AA56XT-I/SN require external timing components for erase or write operations?
No, the 93AA56XT-I/SN performs fully self-timed erase and write cycles - including auto-erase before write - with no external timing components needed. Typical write time is 4 ms per word, 8 ms for ERAL, and 16 ms for WRAL, all internally managed. The DO pin provides Ready/Busy status, allowing software to poll completion without fixed delays.
What is the purpose of the EWEN and EWDS instructions in the 93AA56XT-I/SN?
The EWEN (Erase/Write Enable) and EWDS (Erase/Write Disable) instructions provide hardware-level write protection for the 93AA56XT-I/SN. The device powers up in EWDS mode, blocking all erase/write operations until EWEN is issued. After programming, executing EWDS re-locks the memory. This prevents accidental overwrites during normal operation or power transients, enhancing data integrity in mission-critical applications.
Can the DI and DO pins of the 93AA56XT-I/SN be connected together on a shared bus?
Yes, DI and DO can be wired together, but caution is required: during the dummy zero preceding a READ command, a bus conflict may occur if A0 is high, causing undefined voltage at DO. For reliable shared-bus operation, use a pull-up resistor on DO and ensure proper timing alignment. The 93AA56XT-I/SN's high-impedance DO output supports this configuration when implemented correctly.
Is the 93AA56XT-I/SN suitable for new designs, and what is its replacement recommendation?
No - the 93AA56XT-I/SN is marked "Not recommended for new designs" in the official Microchip datasheet (DS20067K). Microchip recommends migrating to the 93AA56C-I/SN, which offers identical pinout, instruction set, and electrical behavior, plus enhanced ESD protection (6 kV HBM) and updated process reliability. The 93AA56XT-I/SN remains supported for legacy production continuity.
93AA56XT-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:
- 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:
- Microwire
- Clock Frequency:
- 2 MHz
- Write Cycle Time - Word, Page:
- 10ms
- 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
93AA56XT-I/SN FAQ
1.How can I place an order for 93AA56XT-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA56XT-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 93AA56XT-I/SN reliable?
The price and inventory of 93AA56XT-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 93AA56XT-I/SN is usually 5 days.
3.What payment methods are accepted for 93AA56XT-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA56XT-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA56XT-I/SN?
93AA56XT-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA56XT-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 93AA56XT-I/SN?
For technical support, including 93AA56XT-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA56XT-I/SN requirements.
6.How does Aetrix verify that 93AA56XT-I/SN is sourced from the original manufacturer or authorized distributors?
All 93AA56XT-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 93AA56XT-I/SN meets industry standards.
7.What is the process for return or replacement of 93AA56XT-I/SN?
All 93AA56XT-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93AA56XT-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 93AA56XT-I/SN part is unused and in its original packaging.
Return procedure for 93AA56XT-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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