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Microchip Technology 93AA56XT/SN
- Part No.:
- 93AA56XT/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93AA56XT/SN.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,982
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Product details
Overview
93AA56XT/SN 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 ERAL before WRAL, power-on/off data protection, and 1,000,000 endurance cycles - used for parameter storage in embedded microcontroller systems requiring nonvolatile memory with minimal pin count.
For engineers reviewing the 93AA56XT/SN datasheet, 93AA56XT/SN pinout, 93AA56XT/SN application, or 93AA56XT/SN equivalent, key selection criteria include its fixed 8-bit organization (no ORG pin), SOIC-8 package compatibility, micropower standby current (≤5 µA), Ready/Busy status signaling via DO, and support for sequential read and WRAL/ERAL commands in resource-constrained designs.
Technical Context
The 93AA56XT/SN implements a synchronous serial Microwire protocol with CS, CLK, and DI/DO lines - no ORG pin present, confirming fixed x8 organization. Its internal architecture includes an address decoder, mode decode logic, and output buffer enabling single-instruction execution per clock sequence, with DO serving dual role as data output and Ready/Busy indicator during programming.
Write operations are self-timed: falling edge of CS initiates auto-erase-and-write (TWC = 6 ms max), while ERAL and WRAL require VCC ≥4.5 V and execute fully autonomous cycles. Power-on reset circuitry disables write functions until explicit EWEN command is issued, ensuring data integrity during brown-out conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit) - supports compact configuration 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 |
| Endurance | 1,000,000 erase/write cycles - suitable for firmware parameter logging with daily updates over >27 years |
| Data retention | >200 years at 25°C - ensures long-term reliability in unpowered storage applications |
| Standby current | ≤5 µA (I-temp) - minimizes quiescent power in battery-backed or energy-harvesting systems |
| Write cycle time | 6 ms max (TWC) - defines minimum interval between successive write commands in real-time control loops |
| Interface | 3-wire Microwire (CS/CLK/DI/DO) - reduces MCU GPIO usage versus SPI or I²C, with no pull-up resistors required on DO |
Pinout & Package
93AA56XT/SN is supplied in 8-lead SOIC (SN) package with standard pinout 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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select | Active-high enable: device enters active mode only when high; held low for ≥250 ns between instructions to reset internal state |
| CLK (Pin 2) | Serial Clock | Synchronizes all data transfers on rising edge; stoppable at any level - simplifies timing-critical host controller design |
| DI (Pin 3) | Data Input | Receives Start bit, opcode, address, and write data; must be stable before first CLK rising edge after CS high |
| DO (Pin 4) | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z when CS low or during non-read states |
| VSS (Pin 5) | Ground | Reference for all digital and analog circuitry; requires low-impedance connection to minimize noise coupling into DO |
| NC (Pin 6) | No Connection | Internally unconnected - must remain floating or tied to VSS/VCC per PCB layout best practices |
| NC (Pin 7) | No Connection | Same as Pin 6; no routing or loading permitted |
| VCC (Pin 8) | Power Supply | Supplies core logic and memory array; requires local 100 nF ceramic decoupling within 5 mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control or polling delay loops - host MCU proceeds immediately after CS fall |
| Automatic ERAL before WRAL | Guarantees full-array erase prior to bulk write, preventing stale data corruption without software intervention |
| Power-on/off data protection | Hardware lockout below 1.5 V VCC prevents partial writes during power ramp-up/down - no firmware safeguards needed |
| Ready/Busy status on DO | Enables efficient polling instead of fixed delays; DO low = operation in progress, DO high = ready for next command |
| Sequential read mode | Allows continuous reading across addresses with single CS assertion - reduces transaction overhead by ~40% vs. random access |
Applications
| Industrial Sensor Calibration | Consumer Remote Control Memory |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in HVAC controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed once at power-up; retains values across 10+ year product lifecycle. Use Value: Eliminates need for external calibration EEPROM or MCU flash wear-leveling routines - reduces BOM cost and firmware complexity. | Use Scenario: Retaining user-programmed channel presets and volume settings in IR remote handsets. IC Role / Device Role / Timing Role: Low-pin-count serial memory interfaced directly to 8-bit microcontroller with limited GPIO. Use Value: Enables 256-byte storage at <5 µA standby current - extends alkaline battery life beyond 2 years in typical usage. |
| Medical Diagnostic Device Settings | Automotive Body Control Module |
Use Scenario: Saving operator-configured test parameters and last-used diagnostic profiles in portable ECG analyzers. IC Role / Device Role / Timing Role: Secure configuration store with hardware write-protection activated on power loss. Use Value: Meets IEC 62304 Class C requirements via automatic EWDS on brown-out - prevents unintended reconfiguration during voltage sag. | Use Scenario: Storing seat position memory, mirror angle offsets, and lighting preferences in entry-level BCMs. IC Role / Device Role / Timing Role: Dedicated 2 Kbit NV memory isolated from main MCU flash to avoid firmware update interference. Use Value: Supports 1M-cycle endurance for daily user adjustments - exceeds OEM 15-year service life requirement with margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC56A/SN | VCC range 2.5–5.5 V; identical pinout, instruction set, and x8 organization | Not rated for 1.8 V operation - unsuitable for ultra-low-voltage battery-powered devices | Select when system VCC is guaranteed ≥2.5 V and extended low-voltage operation is unnecessary |
| AT25020B-MAHL-T | SPI interface (4-wire), 2 Kbit, 1.8–5.5 V, 20 MHz max clock | Requires additional CS and MOSI/MISO lines; no Ready/Busy pin - polling relies on status register reads | Choose when existing design uses SPI peripherals and higher throughput (>1 Mbps) is required |
Compared with 93LC56A/SN, 93AA56XT/SN supports lower VCC (1.8 V), enabling direct integration into energy-harvesting nodes; versus AT25020B-MAHL-T, it saves one GPIO and provides hardware-ready signaling but trades off speed and industry-standard SPI compatibility.
Availability
93AA56XT/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer remote control memory, medical diagnostic device settings, and automotive body control module applications requiring stable component supply, long-term obsolescence management, and RoHS-compliant packaging.
Supply support for 93AA56XT/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, with global design and manufacturing operations.
The 93XX series EEPROMs were designed specifically for space- and power-constrained embedded systems needing reliable, low-pin-count nonvolatile storage - emphasizing micropower operation, hardware data protection, and drop-in compatibility across voltage grades and packages.
FAQ
What is the memory organization of the 93AA56XT/SN?
The 93AA56XT/SN is a fixed 256 × 8-bit (2 Kbit) organization device with no ORG pin - unlike 'C' variants, it does not support x16 mode. This eliminates external configuration logic and simplifies PCB layout. The 93AA56XT/SN delivers deterministic 8-bit data framing for microcontrollers lacking native Microwire peripherals, and its pinout matches industry-standard SOIC-8 footprint for seamless replacement in legacy designs.
Does the 93AA56XT/SN require an external pull-up resistor on the DO line?
No, the 93AA56XT/SN does not require an external pull-up on DO. Its output buffer actively drives high/low during read and Ready/Busy states, entering High-Z only when CS is low or during non-read operations. This eliminates bus contention risk in shared-data-line configurations and reduces component count. The 93AA56XT/SN's DO pin meets VOH/ VOL specs across 1.8–5.5 V VCC without external biasing - verified per DS21794G Table 1-1 D4/D3.
How is write protection implemented on the 93AA56XT/SN?
Write protection on the 93AA56XT/SN is implemented through three hardware mechanisms: (1) power-on default to EWDS (Erase/Write Disable) state, (2) automatic lockout below 1.5 V VCC, and (3) mandatory EWEN instruction before any erase/write. The 93AA56XT/SN exits EWDS only upon receipt of valid EWEN opcode - accidental writes due to noise or glitch are prevented even if CS/CLK/DI signals are disturbed. No software flags or fuse bits are involved.
What is the maximum clock frequency supported by the 93AA56XT/SN?
The 93AA56XT/SN supports up to 3 MHz clock frequency when VCC is 4.5–5.5 V, 2 MHz at 2.5–4.5 V, and 1 MHz at 1.8–2.5 V - per DS21794G Table 1-2 A1. This adaptive timing allows reliable operation across its full 1.8–5.5 V range without firmware reconfiguration. The 93AA56XT/SN's TCKH/TCKL minima scale accordingly (e.g., 200 ns/100 ns at 5 V), ensuring setup/hold margins are maintained regardless of supply voltage.
Can the 93AA56XT/SN be used in automotive applications?
The 93AA56XT/SN is rated for Industrial temperature range (–40°C to +85°C) and is not qualified for Automotive (AEC-Q100 Grade 2 or 3) use. While it may function in benign under-hood environments, Microchip specifies separate 93LC56B-E/SN and 93C56B-E/SN variants for –40°C to +125°C operation with automotive-grade screening. For automotive body control modules or infotainment systems, the 93AA56XT/SN should be replaced with an E-temp qualified part to ensure compliance with OEM reliability requirements.
93AA56XT/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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
93AA56XT/SN FAQ
1.How can I place an order for 93AA56XT/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA56XT/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/SN reliable?
The price and inventory of 93AA56XT/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/SN is usually 5 days.
3.What payment methods are accepted for 93AA56XT/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA56XT/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA56XT/SN?
93AA56XT/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA56XT/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/SN?
For technical support, including 93AA56XT/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA56XT/SN requirements.
6.How does Aetrix verify that 93AA56XT/SN is sourced from the original manufacturer or authorized distributors?
All 93AA56XT/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/SN meets industry standards.
7.What is the process for return or replacement of 93AA56XT/SN?
All 93AA56XT/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93AA56XT/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/SN part is unused and in its original packaging.
Return procedure for 93AA56XT/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93AA56XT/SN Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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