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Microchip Technology 93AA56CX-I/SN
- Part No.:
- 93AA56CX-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93AA56CX-I/SN.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,467
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Product details
Overview
93AA56CX-I/SN from Microchip Technology is a 2 Kbit low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 1.8–5.5 V supply range, and industrial temperature grade (–40°C to +85°C). It features 256 × 8-bit organization (no ORG pin), 1,000,000 erase/write cycles, >200-year data retention, and automatic erase-before-write functionality. It is used for nonvolatile parameter storage in embedded microcontroller systems requiring reliable, low-power memory.
For engineers reviewing the 93AA56CX-I/SN datasheet, 93AA56CX-I/SN pinout, 93AA56CX-I/SN application, or 93AA56CX-I/SN equivalent, key selection considerations include its fixed 8-bit word size, SOIC-8 package, self-timed write/erase timing (6 ms), Ready/Busy status via DO pin, and compatibility with legacy Microwire controllers in space-constrained industrial designs.
Technical Context
The 93AA56CX-I/SN implements a synchronous serial interface using CS, CLK, and DI/DO pins with start-bit detection and opcode-driven command execution. It supports READ, WRITE, ERASE, ERAL, WRAL, EWEN, and EWDS instructions with clock-synchronized data transfer on rising CLK edges.
Its internal architecture includes an address decoder, mode decode logic, data register, and output buffer, with power-on data protection and voltage-detect circuitry (VPOR = 1.5 V typical) preventing writes during brown-out conditions. The device enters Standby mode when CS is low and exits only upon valid Start condition detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit organization; no ORG pin) |
| VCC range | 1.8 V to 5.5 V - enables direct interfacing with 1.8 V, 3.3 V, and 5 V logic systems without level shifters |
| Endurance | 1,000,000 erase/write cycles - supports frequent firmware or calibration updates in field-deployed devices |
| Data retention | >200 years at +25°C - ensures long-term reliability in unattended or maintenance-free applications |
| Write cycle time | 6 ms (TWC) - defines minimum delay before next instruction; impacts real-time system responsiveness |
| Max clock frequency | 3 MHz at VCC ≥4.5 V - sets upper bound on serial throughput (up to ~300 kbit/s effective) |
| Operating temp | –40°C to +85°C (Industrial grade) - validated for use in factory automation, metering, and industrial control environments |
Pinout & Package
93AA56CX-I/SN is supplied in 8-lead SOIC (SN) package with standard pinout and Pb-free Matte Tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between commands; deselects device into Standby mode |
| CLK | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcodes, addresses, and data; stoppable mid-cycle |
| DI | Data Input | Receives Start bit, instruction opcodes, addresses, and write data; shares signal path with DO in bidirectional configurations |
| DO | Data Output / Status | Outputs read data and provides Ready/Busy status (low = busy) during erase/write; high-Z when inactive |
| VSS | Ground | Reference for all I/O and internal circuitry; requires low-impedance connection to minimize noise coupling |
| NC | No Connection | Pin 7 is internally unconnected; must be left floating or tied to VSS per layout best practice |
| VCC | Power Supply | Supplies core logic and memory array; includes built-in POR detection (1.5 V threshold) for write inhibition during power ramp |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control or polling delays beyond TWC (6 ms); simplifies host firmware |
| Automatic ERAL before WRAL | Ensures full-array write integrity without separate erase command - reduces software complexity and error risk |
| Ready/Busy status on DO | Enables efficient polling-based operation instead of fixed delays; improves system throughput and determinism |
| Power-on/off data protection | Hardware-enforced write inhibition below VPOR (1.5 V) prevents corruption during brown-out or power cycling |
| Industry-standard 3-wire interface | Direct drop-in replacement for legacy Microwire EEPROMs; minimal PCB redesign required for migration |
Applications
| Smart Energy Metering | Industrial PLC Configuration |
|---|---|
Use Scenario: Storing tariff tables, calibration coefficients, and tamper-event logs in electricity/water/gas meters operating unattended for 10+ years. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with guaranteed data integrity across wide temperature and voltage ranges. Use Value: >200-year retention and 1M endurance ensure lifetime data persistence without field replacement or battery backup. | Use Scenario: Holding I/O mapping, PID tuning parameters, and firmware update flags in programmable logic controllers deployed in factory floors. IC Role / Device Role / Timing Role: Configuration memory accessed infrequently but requiring deterministic write completion and brown-out safety. Use Value: Self-timed 6 ms writes and hardware VPOR protection prevent partial writes during line sags or power interruptions. |
| Medical Diagnostic Device Calibration | Automotive Body Control Module |
Use Scenario: Retaining sensor offset/gain values and user-defined test protocols in portable ultrasound or ECG analyzers subject to periodic recalibration. IC Role / Device Role / Timing Role: Secure, low-power configuration store accessible over simple MCU GPIOs with minimal BOM impact. Use Value: 1.8–5.5 V operation allows direct integration with 3.3 V microcontrollers; SOIC-8 footprint eases layout in space-limited handheld enclosures. | Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in automotive BCMs where EEPROM must survive cold cranking (4.5 V min). IC Role / Device Role / Timing Role: Parameter memory supporting infrequent but mission-critical updates under harsh electrical conditions. Use Value: Industrial-grade –40°C to +85°C rating and 1.5 V POR threshold provide robustness against automotive transients and thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC56A-I/SN | VCC range 2.5–5.5 V; identical 256 × 8-bit organization and SOIC-8 package | Lacks 1.8 V support; unsuitable for ultra-low-voltage systems but offers tighter VIL/VIH specs at 2.5 V | Select when system VCC never drops below 2.5 V and higher noise immunity at low voltage is prioritized |
| AT25020B-MAU-T | SPI interface (4-wire), 2 Kbit, 1.8–5.5 V, 20 MHz max clock; different command set and no Ready/Busy pin | Requires SPI master instead of Microwire; no hardware status polling - relies on fixed delays or software timeouts | Select when migrating to SPI infrastructure or when higher throughput (vs. Microwire's 3 MHz limit) is needed |
Compared with 93LC56A-I/SN, 93AA56CX-I/SN enables lower-voltage operation down to 1.8 V while maintaining identical pinout and timing; compared with AT25020B-MAU-T, it retains hardware-ready signaling and Microwire compatibility but trades off peak speed for deterministic status feedback.
Availability
93AA56CX-I/SN is available at Aetrix Electronics and suitable for smart energy metering, industrial PLC configuration, and medical diagnostic device calibration requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 93AA56CX-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, FPGA, and memory solutions, serving industrial, automotive, communications, and consumer markets with high-reliability silicon and development tools.
The 93XX series EEPROMs were designed for cost-sensitive, low-power embedded systems needing proven Microwire-compatible nonvolatile storage with hardware data protection and extended temperature operation.
FAQ
What is the memory organization of the 93AA56CX-I/SN?
The 93AA56CX-I/SN has a fixed 256 × 8-bit organization with no ORG pin. Unlike 'C' variants, it does not support word-size reconfiguration and is dedicated to 8-bit serial communication. This matches the 'A' version designation in Microchip's 93XX56 family and eliminates external logic for memory sizing.
Does the 93AA56CX-I/SN support hardware Ready/Busy signaling?
Yes, the 93AA56CX-I/SN provides Ready/Busy status on the DO pin: DO = low indicates ongoing erase/write operation; DO = high confirms completion. This allows efficient polling instead of fixed delays, improving system responsiveness and reducing CPU overhead during memory updates.
What is the minimum VCC required for write operations on the 93AA56CX-I/SN?
The 93AA56CX-I/SN includes internal voltage detection (VPOR = 1.5 V typical) that inhibits all erase/write functions when VCC falls below this threshold. This ensures data integrity during power ramp-up, brown-out, or battery depletion - no external reset supervisor is needed to protect against partial writes.
Can the 93AA56CX-I/SN be used in place of the 93LC56A-I/SN?
Yes, the 93AA56CX-I/SN is pin-compatible and functionally equivalent to the 93LC56A-I/SN in 8-pin SOIC packages, with identical 256 × 8-bit organization and instruction set. The key difference is wider VCC range (1.8–5.5 V vs. 2.5–5.5 V), making 93AA56CX-I/SN suitable for 1.8 V systems where 93LC56A-I/SN would not operate.
What package type does the 'SN' suffix indicate for the 93AA56CX-I/SN?
The 'SN' suffix in 93AA56CX-I/SN denotes an 8-lead SOIC (Small Outline Integrated Circuit) package with standard dimensions, Pb-free Matte Tin finish, and industry-standard pinout. It is compatible with automated SMT assembly and reflow profiles per JEDEC J-STD-020.
93AA56CX-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- 3 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
93AA56CX-I/SN FAQ
1.How can I place an order for 93AA56CX-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA56CX-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 93AA56CX-I/SN reliable?
The price and inventory of 93AA56CX-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 93AA56CX-I/SN is usually 5 days.
3.What payment methods are accepted for 93AA56CX-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA56CX-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA56CX-I/SN?
93AA56CX-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA56CX-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 93AA56CX-I/SN?
For technical support, including 93AA56CX-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA56CX-I/SN requirements.
6.How does Aetrix verify that 93AA56CX-I/SN is sourced from the original manufacturer or authorized distributors?
All 93AA56CX-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 93AA56CX-I/SN meets industry standards.
7.What is the process for return or replacement of 93AA56CX-I/SN?
All 93AA56CX-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93AA56CX-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 93AA56CX-I/SN part is unused and in its original packaging.
Return procedure for 93AA56CX-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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