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Microchip Technology 93AA56B-I/MS
- Part No.:
- 93AA56B-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
93AA56B-I/MS.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,637
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Product details
Overview
93AA56B-I/MS from Microchip Technology is a 2 Kbit (128 × 16-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 1.8–5.5 V supply range, industrial temperature rating (–40°C to +85°C), and MSOP-8 package. It features self-timed erase/write cycles, automatic ERAL before WRAL, and Ready/Busy status via DO pin - used for configuration storage in microcontroller-based sensor modules.
For engineers reviewing the 93AA56B-I/MS datasheet, 93AA56B-I/MS pinout, 93AA56B-I/MS application, or 93AA56B-I/MS equivalent, key selection criteria include guaranteed 128 × 16-bit organization (no ORG pin), 1 million erase/write endurance, 200-year data retention, and compatibility with low-power embedded systems requiring nonvolatile parameter storage without external word-size configuration logic.
Technical Context
The 93AA56B-I/MS implements a fixed 128-word × 16-bit memory array accessed via synchronous serial protocol using CS, CLK, and DI/DO lines. It operates in Standby mode when CS is low and enters active command mode on detection of a Start bit (CS high + DI high at CLK rising edge). All instructions - READ, WRITE, ERASE, ERAL, WRAL, EWEN, EWDS - are decoded from 2-bit opcodes followed by address and optional data bits.
Its internal control logic enforces power-on write protection: device powers up in EWDS (Erase/Write Disable) state, requiring explicit EWEN before any programming operation. Ready/Busy status is actively signaled on DO during erase/write cycles only when CS is reasserted after ≥250 ns low time (TCSL); DO returns High-Z upon CS deassertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit organized as 128 words × 16 bits - eliminates need for external word-width multiplexing in 16-bit data path designs |
| VCC range | 1.8 V to 5.5 V - supports direct interfacing with 1.8 V, 3.3 V, and 5 V microcontrollers without level shifters |
| Endurance | 1,000,000 erase/write cycles - enables reliable logging or calibration update in field-deployed equipment |
| Data retention | Greater than 200 years at 25°C - ensures long-term validity of stored configuration or calibration data |
| Write cycle time | 6 ms typical for erase/write (TWC) - defines minimum interval between successive writes to same address |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - reduces PCB routing complexity vs. SPI or I²C |
| Temp range | Industrial: –40°C to +85°C - qualified for use in automotive body electronics and industrial control panels |
Pinout & Package
8-pin MSOP (150 mil) package with exposed pad (optional VSS connection), Pb-free Matte Tin finish, footprint compatible with SOIC-8 but 30% smaller area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-high enable; must be held low ≥250 ns between commands; initiates self-timed write on falling edge for 93AA devices |
| 2 (CLK) | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcode/address/data; stoppable mid-sequence |
| 3 (DI) | Data Input | Accepts Start bit, opcodes, addresses, and write data; tied high with CS to detect Start condition |
| 4 (DO) | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge |
| 5 (VSS) | Ground | Reference for all digital and analog circuitry; exposed pad may be connected to VSS for thermal relief |
| 6 (NC) | No Connect | Internally unconnected; must be left floating or tied to VSS per layout best practice |
| 7 (ORG) | Organization | Not present on 93AA56B - fixed 16-bit mode; pin is NC and must not be driven |
| 8 (VCC) | Power Supply | 1.8–5.5 V input; internal POR triggers at ~1.5 V; voltage detect disables programming below threshold |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates external timing circuitry; device manages internal auto-erase before write, reducing firmware overhead |
| Automatic ERAL before WRAL | Ensures full-array readiness prior to bulk write - prevents partial-write corruption without host software intervention |
| Power-on data protection | Hardware-enforced lockout below 1.5 V VCC prevents inadvertent writes during brown-out or power ramp-up |
| Ready/Busy status on DO | Enables polling-based write completion detection without interrupt lines or additional GPIO resources |
| Sequential read mode | Allows continuous address increment with CS held high - simplifies firmware for reading multi-byte configuration blocks |
Applications
| Motor Control Configuration Storage | Smart Sensor Calibration Data |
|---|---|
Use Scenario: Storing motor commutation tables, PID coefficients, and fault thresholds in BLDC motor drives. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding runtime-critical parameters accessible during boot and runtime. Use Value: Enables field-upgradable tuning without firmware reflash; 128×16-bit layout matches typical 16-bit MCU register width. | Use Scenario: Retaining factory-calibrated offset/gain values and temperature compensation curves for MEMS accelerometers. IC Role / Device Role / Timing Role: Dedicated calibration memory mapped to sensor subsystem, read once at power-on. Use Value: Guarantees measurement accuracy across temperature; 200-year retention avoids recalibration in sealed industrial sensors. |
| IoT Edge Device Identity | Industrial HMI Display Settings |
Use Scenario: Securing unique device identifiers (MAC, serial number, cryptographic keys) in battery-backed wireless nodes. IC Role / Device Role / Timing Role: Tamper-resistant identity store accessed only during secure boot or provisioning. Use Value: Low 1.8 V operation extends battery life; 1M endurance supports secure key rotation over product lifetime. | Use Scenario: Saving user-adjusted brightness, contrast, language, and alarm thresholds on panel-mounted HMIs. IC Role / Device Role / Timing Role: Persistent UI state memory updated infrequently but required across power cycles. Use Value: MSOP-8 footprint saves board space in compact enclosures; industrial temp rating ensures reliability in factory environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC56B-I/MS | VCC min = 2.5 V; no change in organization or pinout | Not suitable for 1.8 V systems; otherwise identical functional behavior | Select if system VCC is ≥2.5 V and higher noise immunity is desired |
| AT25020B-MAHL-T | SPI interface (4-wire), 2 Kbit × 8-bit, 1.8–5.5 V, SOIC-8 | Requires separate SI/SO lines and chip select; lacks Ready/Busy pin - needs timeout-based write polling | Choose when migrating to SPI-standard peripherals or consolidating interface protocols |
Compared with 93LC56B-I/MS, the 93AA56B-I/MS supports lower-voltage operation down to 1.8 V while maintaining identical 128×16-bit organization and MSOP-8 footprint; versus AT25020B-MAHL-T, it offers tighter timing control via Ready/Busy signaling and reduced pin count, at the cost of Microwire-specific command set.
Availability
93AA56B-I/MS is available at Aetrix Electronics and suitable for motor control, smart sensor, IoT edge node, and industrial HMI applications requiring stable component supply, long-life data retention, and compact packaging.
Supply support for 93AA56B-I/MS 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.
The 93XX series EEPROMs were designed for low-power, space-constrained embedded systems needing reliable nonvolatile storage with minimal interface overhead and robust data integrity across wide temperature ranges.
FAQ
What is the memory organization of the 93AA56B-I/MS?
The 93AA56B-I/MS has a fixed 128 × 16-bit (2 Kbit) organization. Unlike 'C' variants, it does not feature an ORG pin - its 16-bit word width is hardwired, eliminating external configuration logic and simplifying design for 16-bit data paths. This is confirmed in the Device Selection Table and Pin Function Table of DS21794G.
Does the 93AA56B-I/MS require an external pull-up resistor on the DO line?
No, the 93AA56B-I/MS 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 during non-read operations. A pull-up is unnecessary and may interfere with valid low-level signaling during busy states.
Can the 93AA56B-I/MS be used in a 1.8 V system?
Yes, the 93AA56B-I/MS is fully specified for 1.8 V operation across the industrial temperature range (–40°C to +85°C), with validated AC/DC characteristics including clock frequency up to 2 MHz and write current ≤2 µA at 2.5 V. Its 1.8–5.5 V VCC range makes it suitable for ultra-low-power battery-operated devices.
How is write protection implemented on the 93AA56B-I/MS?
Write protection on the 93AA56B-I/MS is implemented through hardware-enforced Erase/Write Disable (EWDS) mode at power-up, requiring an explicit EWEN instruction before any ERASE or WRITE command. Additionally, internal voltage detection disables programming when VCC falls below ~1.5 V, preventing corruption during brown-out conditions.
What package type is used for the 93AA56B-I/MS?
The 93AA56B-I/MS uses an 8-pin MSOP (Mini Small Outline Package) with 150-mil body width and exposed thermal pad. Per DS21794G-page 12 and Package Marking Information, 'MS' in the part number explicitly denotes MSOP packaging, distinct from PDIP (P), SOIC (SN), TSSOP (ST), or SOT-23 (OT).
93AA56B-I/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 128 x 16
- 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-MSOP
93AA56B-I/MS FAQ
1.How can I place an order for 93AA56B-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA56B-I/MS 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 93AA56B-I/MS reliable?
The price and inventory of 93AA56B-I/MS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93AA56B-I/MS is usually 5 days.
3.What payment methods are accepted for 93AA56B-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA56B-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA56B-I/MS?
93AA56B-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA56B-I/MS 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 93AA56B-I/MS?
For technical support, including 93AA56B-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA56B-I/MS requirements.
6.How does Aetrix verify that 93AA56B-I/MS is sourced from the original manufacturer or authorized distributors?
All 93AA56B-I/MS 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 93AA56B-I/MS meets industry standards.
7.What is the process for return or replacement of 93AA56B-I/MS?
All 93AA56B-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 93AA56B-I/MS, 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 93AA56B-I/MS part is unused and in its original packaging.
Return procedure for 93AA56B-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93AA56B-I/MS Tags
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