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Microchip Technology 93AA56X-I/SN
- Part No.:
- 93AA56X-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93AA56X-I/SN.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,387
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Product details
Overview
93AA56X-I/SN from Microchip Technology 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/WRAL support, and Ready/Busy status signaling via DO pin - used for firmware parameter storage in embedded microcontroller systems.
For engineers reviewing the 93AA56X-I/SN datasheet, 93AA56X-I/SN pinout, 93AA56X-I/SN application, or 93AA56X-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 space-constrained SOIC-8 (SN) packaging in industrial-grade designs.
Technical Context
This device implements a synchronous serial Microwire protocol with CS/CLK/DI/DO signals and no internal address counter reset on CS deassertion - enabling true sequential read across all 256 bytes. Its internal logic enforces power-on write protection below 1.5 V and requires explicit EWEN command before any erase or write operation.
The 93AA56X-I/SN uses CMOS EEPROM cell technology with auto-erase-before-write architecture and supports both single-byte and full-array (ERAL/WRAL) operations. All timing parameters - including TWC = 6 ms write cycle, TPD ≤ 400 ns output delay, and TCSL ≥ 250 ns chip select low time - are guaranteed over the full 1.8–5.5 V and –40°C to +85°C range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit) - fixed x8 organization; no ORG pin; no word-size configuration required |
| VCC range | 1.8 V to 5.5 V - supports direct interface with 1.8 V, 3.3 V, and 5 V microcontrollers without level shifting |
| Endurance | 1,000,000 erase/write cycles - validated at 25°C and 5.0 V; enables long-term field calibration storage |
| Data retention | >200 years at 25°C - ensures firmware parameter integrity across product lifecycle without refresh |
| Write cycle time | 6 ms typical - self-timed; eliminates need for external timeout logic or polling overhead beyond DO status check |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI, DO) - requires only four GPIOs; no SPI mode bits or configuration registers |
| Temp grade | Industrial (–40°C to +85°C) - qualified for use in motor control, industrial sensors, and programmable logic modules |
Pinout & Package
8-pin SOIC package (SN suffix), 3.9 mm × 4.9 mm body, 1.27 mm pitch. Pin 1 marked by bevelled corner or laser dot; RoHS-compliant matte tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS | Chip Select | Active-high enable; must remain low ≥250 ns between instructions; deselects device into standby but completes ongoing write |
| 2 CLK | Serial Clock | Positive-edge synchronized I/O; clock can pause mid-transfer; no clock required during self-timed write |
| 3 DI | Data Input | Accepts start bit, opcode, address, and data; high-impedance when CS low; no internal pull-up/down |
| 4 DO | Data Output / Status | Tri-state output; delivers read data or Ready/Busy (low = busy); enters High-Z on CS falling edge |
| 5 VSS | Ground | Primary reference for all I/O and internal logic; must be connected before VCC during power-up |
| 6 NC | No Connect | Internally unconnected; must be left floating or tied to VSS per layout best practice; not bonded |
| 7 NC | No Connect | Same as Pin 6 - unused terminal; no internal connection; avoid routing signals nearby |
| 8 VCC | Power Supply | 1.8–5.5 V input; internal POR circuit triggers at ~1.5 V; decoupling capacitor (0.1 µF) required within 5 mm |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates external timing components and software delays - write completion signaled via DO pin status |
| Automatic ERAL before WRAL | Ensures full-array write reliability without requiring separate erase command - reduces firmware complexity |
| Power-on/off data protection | Hardware lockout below 1.5 V VCC prevents corruption during brown-out or hot-plug events |
| Ready/Busy status on DO | Enables efficient polling instead of fixed-delay waits - reduces CPU idle time and improves system responsiveness |
| Sequential read function | Allows continuous byte streaming across 256-byte boundary with single CS assertion - simplifies firmware buffer management |
Applications
| Motor Control Parameter Storage | Industrial Sensor Calibration Data |
|---|---|
Use Scenario: Storing PID coefficients, current limits, and encoder zero-offset values in BLDC motor drives that undergo field reconfiguration. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed during boot and runtime via MCU GPIO bit-banged Microwire interface. Use Value: Enables field updates without reflashing MCU firmware; retains settings across 10+ years of operation at 85°C ambient. | Use Scenario: Holding factory-trimmed gain/offset corrections and temperature compensation tables for analog sensor front-ends in PLC I/O modules. IC Role / Device Role / Timing Role: Dedicated calibration memory mapped to MCU's peripheral bus via software-controlled GPIO interface. Use Value: Eliminates need for external DACs or trim-pots; supports recalibration in service without hardware modification. |
| Embedded System Configuration | Power Supply Sequencing Settings |
Use Scenario: Saving user-defined boot modes, communication baud rates, and display brightness levels in medical diagnostic equipment UI controllers. IC Role / Device Role / Timing Role: System configuration store accessed during initialization and updated on menu selection via interrupt-driven bit-bang driver. Use Value: Survives 100,000+ power cycles; withstands ESD events up to 4 kV per HBM - critical for clinical environment reliability. | Use Scenario: Storing voltage ramp rates, delay times, and fault thresholds for multi-rail DC-DC sequencers in telecom base station power management units. IC Role / Device Role / Timing Role: Critical timing parameter vault read once at power-up and locked until next configuration update. Use Value: Guarantees deterministic startup behavior after brown-out; immune to VCC droop-induced corruption due to built-in POR lockout. |
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; no 1.8 V support | Not suitable for 1.8 V logic domains; requires level-shifting if interfacing with sub-2.5 V MCUs | Select only if system VCC ≥2.5 V and 1.8 V operation is unnecessary |
| AT25020B-MAHL-T | SPI interface (4-wire), 2 Kbit, 1.8–5.5 V, 20 MHz max clock; no Ready/Busy pin | Requires SPI peripheral or bit-bang with different protocol framing; no hardware status polling - relies on fixed delays | Choose when SPI infrastructure already exists and DO-based polling is not required |
Compared with 93LC56A-I/SN, the 93AA56X-I/SN enables direct 1.8 V MCU interfacing and offers tighter VCC min specification; compared with AT25020B-MAHL-T, it provides hardware-ready signaling and simpler timing control at the cost of non-SPI compatibility.
Availability
93AA56X-I/SN is available at Aetrix Electronics and suitable for motor control, industrial sensor calibration, and embedded configuration storage requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 93AA56X-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 devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93XX series EEPROMs were designed specifically for cost-sensitive, low-power embedded systems requiring reliable nonvolatile storage with minimal pin count and software overhead - targeting industrial, automotive, and consumer applications.
FAQ
What is the exact memory organization of the 93AA56X-I/SN?
The 93AA56X-I/SN is a fixed 256 × 8-bit (2 Kbit) device with no ORG pin - it implements dedicated x8 organization only. Unlike 'C' variants, it does not support x16 mode or external word-size selection. This is confirmed in the Device Selection Table and Pin Function Table of DS21794G, where 'A' versions are explicitly listed as "no ORG" and "8-bit".
Does the 93AA56X-I/SN require an external pull-up resistor on the DO pin?
No, the 93AA56X-I/SN does not require an external pull-up on DO. The DO pin is actively driven high or low during read or status polling, and enters High-Z when CS is low or during non-read operations. A pull-up would interfere with Ready/Busy detection (DO low = busy) and is not specified in the datasheet or application notes for this part.
Can the 93AA56X-I/SN be used with a 1.8 V microcontroller without level shifters?
Yes, the 93AA56X-I/SN supports 1.8 V operation across its full industrial temperature range (–40°C to +85°C), with guaranteed VIH1 = 2.0 V minimum at VCC ≥2.7 V and VIH2 = 0.7×VCC at VCC < 2.7 V - meaning at 1.8 V, VIH = 1.26 V, well within standard 1.8 V logic high thresholds. This allows direct GPIO connection to 1.8 V MCUs.
What is the purpose of the two NC pins on the 93AA56X-I/SN SOIC package?
Pins 6 and 7 on the 93AA56X-I/SN (SOIC-8) are No Connect terminals - internally unconnected and unbonded. They must be left floating or tied to VSS per PCB layout best practices to minimize noise coupling. Their presence accommodates pinout compatibility across the broader 93XX56 family, including C-variants that use Pin 6 for ORG.
How does the 93AA56X-I/SN handle power loss during a write cycle?
The 93AA56X-I/SN incorporates hardware power-loss protection: its internal POR circuit disables all write operations when VCC drops below ~1.5 V, preventing partial writes or data corruption. Combined with auto-erase-before-write architecture, this ensures that either a write completes fully or leaves memory unchanged - no invalid intermediate states occur.
93AA56X-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
93AA56X-I/SN FAQ
1.How can I place an order for 93AA56X-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA56X-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 93AA56X-I/SN reliable?
The price and inventory of 93AA56X-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 93AA56X-I/SN is usually 5 days.
3.What payment methods are accepted for 93AA56X-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA56X-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA56X-I/SN?
93AA56X-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA56X-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 93AA56X-I/SN?
For technical support, including 93AA56X-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA56X-I/SN requirements.
6.How does Aetrix verify that 93AA56X-I/SN is sourced from the original manufacturer or authorized distributors?
All 93AA56X-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 93AA56X-I/SN meets industry standards.
7.What is the process for return or replacement of 93AA56X-I/SN?
All 93AA56X-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93AA56X-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 93AA56X-I/SN part is unused and in its original packaging.
Return procedure for 93AA56X-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93AA56X-I/SN Tags
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