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Microchip Technology 93AA56AX-I/SN
- Part No.:
- 93AA56AX-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93AA56AX-I/SN.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,404
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Product details
Overview
93AA56AX-I/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, and Ready/Busy status signaling via DO pin - used in embedded microcontroller systems for parameter storage, calibration data retention, and firmware configuration.
For engineers reviewing the 93AA56AX-I/SN datasheet, 93AA56AX-I/SN pinout, 93AA56AX-I/SN application, or 93AA56AX-I/SN equivalent, key selection criteria include its dedicated 8-bit organization (no ORG pin), 1 million erase/write endurance, 200-year data retention, and compatibility with low-power microcontroller peripherals requiring serial nonvolatile memory with deterministic timing and hardware-level write protection.
Technical Context
The 93AA56AX-I/SN implements a synchronous serial Microwire protocol with CS/CLK/DI/DO signals and no ORG pin - fixed 256 × 8-bit memory map. Its internal logic enforces power-on data protection, automatic ERAL prior to WRAL, and EWEN/EWDS command-based write enable/disable control, ensuring robustness against unintended writes during brown-out or noise events.
Timing is governed by device-specific AC parameters: max clock frequency of 3 MHz at VCC ≥ 4.5 V, TWC (program cycle time) of 6 ms, and TSV (status valid time) as low as 200 ns - enabling tight integration with real-time MCU firmware that polls DO for Ready/Busy without software timeouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit) - fixed x8 organization; no ORG pin required or functional |
| Supply voltage | 1.8–5.5 V - supports direct interfacing with 1.8 V, 3.3 V, and 5 V MCUs without level shifters |
| Endurance | 1,000,000 erase/write cycles - enables frequent field updates (e.g., sensor calibration logs) |
| Data retention | >200 years at 25°C - ensures long-term reliability in unpowered storage applications |
| Interface | 3-wire Microwire-compatible (CS, CLK, DI/DO) - minimal GPIO usage; no I²C pull-ups or SPI SS complexity |
| Operating temp | –40°C to +85°C (Industrial grade) - qualified for industrial control, metering, and automotive body electronics |
| Write cycle time | 6 ms typical (TWC) - deterministic self-timed erase+write eliminates need for MCU wait-state polling overhead |
Pinout & Package
93AA56AX-I/SN is packaged in 8-lead SOIC (SN), with lead finish Pb-free (Matte Tin). Pin 1 = CS, Pin 2 = CLK, Pin 3 = DI, Pin 4 = DO, Pin 5 = VSS, Pin 6 = NC (no internal connection), Pin 7 = NC, Pin 8 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; deselects device into standby mode |
| CLK (Pin 2) | Serial Clock | Synchronizes all data transfers on rising edge; stoppable at any point; no clock required during self-timed write |
| DI (Pin 3) | Data Input | Accepts Start bit, opcode, address, and write data; shares bus with DO only with external current-limiting resistor |
| DO (Pin 4) | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z when CS is low or after status read |
| VSS (Pin 5) | Ground | Reference for all digital and analog circuitry; must be low-impedance connection |
| NC (Pin 6, 7) | No Connection | Internally unconnected; may be left floating or tied to VSS per PCB layout best practice |
| VCC (Pin 8) | Power Supply | Supplies core logic and memory array; includes internal POR detection at ~1.5 V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for MCU-controlled timing delays; internal state machine completes full auto-erase + program in ≤6 ms |
| Automatic ERAL before WRAL | Guarantees clean memory state before bulk write; prevents partial-write corruption without host software intervention |
| Power-on/off data protection | Hardware lockout below ~1.5 V VCC prevents spurious writes during power ramp-up/down or brownout |
| Ready/Busy status on DO | Enables efficient polling instead of fixed delays; reduces firmware latency and improves system responsiveness |
| EWEN/EWDS command security | Requires explicit enable before any erase/write; default power-up state is write-disabled (EWDS), preventing accidental overwrites |
Applications
| Smart Energy Metering | Industrial PLC Configuration |
|---|---|
Use Scenario: Storing tariff schedules, meter calibration coefficients, and tamper-event logs across power cycles. IC Role / Device Role / Timing Role: Nonvolatile parameter store interfaced directly to 8-bit/32-bit MCU via 3-wire Microwire; handles infrequent but critical writes with guaranteed atomicity. Use Value: 200-year data retention ensures lifetime calibration validity; 1M endurance supports daily log updates for >2,700 years. | Use Scenario: Retaining I/O mapping tables, PID tuning parameters, and firmware update flags in programmable logic controllers. IC Role / Device Role / Timing Role: Dedicated configuration EEPROM accessed during boot and runtime; uses DO polling for deterministic write completion. Use Value: 6 ms self-timed write enables fast reconfiguration without blocking main control loop; industrial temp rating ensures operation in cabinet environments up to +85°C. |
| Automotive Body Control Module | Medical Diagnostic Equipment |
Use Scenario: Saving seat/mirror position presets, lighting profiles, and diagnostic trouble codes (DTCs) in 12 V vehicle systems. IC Role / Device Role / Timing Role: Low-voltage EEPROM (1.8–5.5 V) tolerant of battery transients; interfaces to CAN-connected microcontrollers with minimal GPIO overhead. Use Value: Hardware write protection (EWEN/EWDS) prevents DTC corruption during ignition cycling; Pb-free SOIC package meets automotive RoHS requirements. | Use Scenario: Storing sensor calibration offsets, user preferences, and regulatory compliance logs in portable ultrasound or ECG devices. IC Role / Device Role / Timing Role: Ultra-low-power serial EEPROM enabling <1 µA standby current; supports battery-backed operation with minimal energy drain. Use Value: 1.8 V minimum VCC allows direct use with Li-ion battery (3.0–4.2 V) via LDO; 200-year retention guarantees calibration integrity across device lifetime. |
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 | Same 256 × 8-bit organization, 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 if system VCC never drops below 2.5 V and 1.8 V operation is unnecessary |
| AT25020B-MAHL-T | 2 Kbit SPI interface (4-wire), 1.8–5.5 V, 20 MHz max clock; no Ready/Busy pin - uses WIP flag in status register | Requires SPI peripheral instead of generic GPIO-bitbanged Microwire; higher throughput but added software complexity | Select when higher write speed or existing SPI infrastructure justifies interface change |
Compared with 93LC56A-I/SN, the 93AA56AX-I/SN extends low-voltage operation to 1.8 V for ultra-low-power designs; compared with AT25020B-MAHL-T, it offers simpler 3-wire timing and hardware Ready/Busy signaling - reducing firmware overhead in resource-constrained MCUs.
Availability
93AA56AX-I/SN is available at Aetrix Electronics and suitable for smart energy metering, industrial PLC configuration, and automotive body control modules requiring stable component supply, long-life data retention, and industrial-grade temperature performance.
Supply support for 93AA56AX-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, with global design and manufacturing operations.
The 93XX series EEPROMs - including the 93AA56AX-I/SN - were designed specifically for cost-sensitive, low-power embedded systems requiring reliable, pin-efficient serial nonvolatile memory with hardware write protection and deterministic timing.
FAQ
What is the memory organization of the 93AA56AX-I/SN?
The 93AA56AX-I/SN has a fixed 256 × 8-bit (2 Kbit) organization with no ORG pin - unlike 'C' variants, it does not support word-size selection. This simplifies PCB layout and firmware design by eliminating external ORG biasing and associated configuration logic. The device always operates in x8 mode, delivering one byte per READ/WRITE cycle.
Does the 93AA56AX-I/SN require an external pull-up resistor on the DO line?
No, the 93AA56AX-I/SN does not require an external pull-up on DO. The DO pin actively drives high/low during READ and Ready/Busy status reporting, and enters High-Z when CS is low or after status is read. A pull-up is only needed if DI and DO are shorted on a shared bus - in which case a current-limiting resistor (e.g., 10 kΩ) is mandatory to prevent bus conflict.
How does write protection work on the 93AA56AX-I/SN?
The 93AA56AX-I/SN uses command-based write protection: it powers up in Erase/Write Disable (EWDS) mode, blocking all ERASE/WRITE/WRAL commands until an explicit EWEN instruction is issued. After programming, executing EWDS restores protection. This prevents accidental writes during power transitions or noise events - a hardware-enforced safeguard independent of MCU firmware state.
What is the maximum clock frequency supported by the 93AA56AX-I/SN?
The 93AA56AX-I/SN supports up to 3 MHz clock frequency when VCC is 4.5–5.5 V. At 2.5–4.5 V, max clock is 2 MHz; at 1.8–2.5 V, it is 1 MHz. These limits ensure reliable setup/hold timing (e.g., TDIS ≥ 50 ns at 1.8 V) and are specified across the full industrial temperature range (–40°C to +85°C).
Can the 93AA56AX-I/SN be used in battery-powered applications?
Yes, the 93AA56AX-I/SN is well-suited for battery-powered applications: it operates down to 1.8 V, draws only 1 µA typical standby current (ICCS), and consumes ≤500 µA during READ at 2.5 V. Its 200-year data retention and 1M endurance allow multi-year deployment in remote sensors or portable medical devices without memory replacement.
93AA56AX-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
- 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
93AA56AX-I/SN FAQ
1.How can I place an order for 93AA56AX-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA56AX-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 93AA56AX-I/SN reliable?
The price and inventory of 93AA56AX-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 93AA56AX-I/SN is usually 5 days.
3.What payment methods are accepted for 93AA56AX-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA56AX-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA56AX-I/SN?
93AA56AX-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA56AX-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 93AA56AX-I/SN?
For technical support, including 93AA56AX-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA56AX-I/SN requirements.
6.How does Aetrix verify that 93AA56AX-I/SN is sourced from the original manufacturer or authorized distributors?
All 93AA56AX-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 93AA56AX-I/SN meets industry standards.
7.What is the process for return or replacement of 93AA56AX-I/SN?
All 93AA56AX-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93AA56AX-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 93AA56AX-I/SN part is unused and in its original packaging.
Return procedure for 93AA56AX-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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