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Microchip Technology 93AA56BT-I/MS
- Part No.:
- 93AA56BT-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
93AA56BT-I/MS.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,892
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Product details
Overview
93AA56BT-I/MS from Microchip Technology Inc. is a 2 Kbit low-voltage serial EEPROM with 256 × 8-bit organization, supporting Microwire-compatible 3-wire serial interface (CS/CLK/DI/DO), 1.8–5.5 V supply, and industrial temperature range (−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 - deployed in embedded microcontroller parameter storage and sensor calibration memory.
For engineers reviewing the 93AA56BT-I/MS datasheet, 93AA56BT-I/MS pinout, 93AA56BT-I/MS application, or 93AA56BT-I/MS equivalent, key selection criteria include VCC operating range (1.8–5.5 V), 8-bit x256 organization (no ORG pin), MSOP-8 package compatibility, Ready/Busy status via DO pin, and support for sequential read and auto-erase functionality in space-constrained industrial control modules.
Technical Context
The 93AA56BT-I/MS implements a synchronous Microwire-compatible serial interface with start-bit detection, opcode-driven command set (READ/WRITE/ERASE/ERAL/WRAL/EWEN/EWDS), and internal address counter enabling sequential read. Its memory array uses floating-gate EEPROM technology with on-chip charge pump for write/erase operations without external high voltage.
Power management includes automatic standby mode when CS is low, POR circuitry triggering at ~1.5 V, and ultra-low ICCS (≤1 µA) during inactive periods. The DO pin serves dual function: serial data output during READ and Ready/Busy status indicator during programming - requiring CS reassertion after TCSL ≥250 ns to sample status.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit organization; fixed x8, no ORG pin) |
| VCC range | 1.8 V to 5.5 V - supports single-supply operation across 1.8 V logic systems and legacy 5 V designs |
| Interface | 3-wire Microwire-compatible serial (CS, CLK, DI, DO) - requires no I²C pull-ups or SPI SS deassertion sequencing |
| Write cycle time | 6 ms typical - self-timed erase-and-write eliminates need for external timing control or busy polling overhead |
| Endurance | 1,000,000 erase/write cycles - enables field-updatable configuration storage in long-lifecycle industrial equipment |
| Data retention | 200 years at 25°C - ensures calibration constants and device IDs remain valid over full product service life |
| Operating temp | −40°C to +85°C (Industrial grade) - qualified for use in motor drives, PLC I/O modules, and outdoor metering hardware |
Pinout & Package
8-pin MSOP (Micro Small Outline Package), 3.0 mm × 3.0 mm body, 0.65 mm pitch, exposed pad optional (VSS or float). Pin 1 marked by laser dot; pin 1 location confirmed per DS21794G-page 17.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-high enable; must be held ≥250 ns low between instructions; initiates self-timed write on falling edge |
| 2 (CLK) | Serial Clock | Positive-edge synchronized I/O; stoppable mid-transfer; no clock required during auto-erase/write |
| 3 (DI) | Data Input | Accepts start bit, opcode, address, and write data; tolerant of bus conflict if shared with DO (requires series resistor) |
| 4 (DO) | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge; status readable only after TCSL ≥250 ns |
| 5 (VSS) | Ground | Reference for all I/O and internal circuitry; exposed pad may connect to PCB ground plane for thermal relief |
| 6 (NC) | No Connect | Internally unconnected; must be left floating or tied to VSS per layout best practice (no functional impact) |
| 7 (ORG) | Organization select | Not applicable - 93AA56B variant has dedicated x16 organization; this part is 93AA56BT-I/MS (x8-only, ORG pin not used) |
| 8 (VCC) | Power Supply | 1.8–5.5 V input; POR threshold ~1.5 V prevents spurious writes during brown-out; decoupling capacitor required |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates external timing components and firmware delay loops - reduces BOM count and simplifies driver code |
| Auto-ERAL before WRAL | Guarantees clean memory state prior to bulk write - prevents partial-data corruption during firmware update sequences |
| Power-on/off protection | Hardware lockout below ~1.5 V VCC - prevents inadvertent writes during power ramp-up/down in battery-backed systems |
| Ready/Busy via DO pin | Enables efficient polling without additional status lines - saves MCU GPIOs and avoids interrupt latency in resource-limited designs |
| Sequential read mode | Allows continuous burst reads across addresses with single CS assertion - cuts transaction overhead by >40% vs. random-access reads |
Applications
| Motor Control Parameter Storage | Smart Sensor Calibration Memory |
|---|---|
Use Scenario: Storing PID coefficients, current limits, and encoder zero-offset values in BLDC motor drivers. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during boot and runtime recalibration. Use Value: Enables field-adjustable tuning without firmware reflash; retains settings across 10+ year service life with 200-year data retention. | Use Scenario: Holding factory-trimmed gain/offset values and temperature compensation tables in industrial pressure sensors. IC Role / Device Role / Timing Role: Microwire slave device providing calibrated measurement metadata to host MCU via minimal 4-pin interface. Use Value: Reduces calibration labor cost by storing multi-point trim data off-chip; supports 1M-cycle field recalibration without replacement. |
| PLC I/O Module Configuration | Energy Meter Firmware Patch Storage |
Use Scenario: Saving channel-specific scaling factors, alarm thresholds, and input filter settings in modular programmable logic controllers. IC Role / Device Role / Timing Role: Dedicated 2 Kbit EEPROM interfaced to ARM Cortex-M host via GPIO-banged Microwire. Use Value: Allows end-user configuration persistence without modifying main flash; operates reliably at −40°C in unheated cabinet environments. | Use Scenario: Storing small firmware patches or security keys in utility-grade electricity meters with tamper-proof requirements. IC Role / Device Role / Timing Role: Secure nonvolatile memory holding encrypted update payloads accessible only after authentication handshake. Use Value: Supports remote firmware correction without full reprogramming; RoHS-compliant matte tin finish meets utility industry environmental mandates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC56BT-I/MS | VCC range 2.5–5.5 V; same 256×8 organization, MSOP-8 package, and instruction set | Not suitable for 1.8 V systems; requires higher minimum supply voltage | Select if system VCC ≥2.5 V and legacy 93LC family qualification is required |
| AT25020B-MAHL-T | SPI interface (4-wire), 2 Kbit (256×8), 1.8–5.5 V, SOIC-8 package; no Ready/Busy pin | Lacks DO-based status signaling - requires fixed 5 ms delay or software polling via status register | Choose when migrating to SPI infrastructure or when board layout already accommodates SOIC-8 footprint |
Compared with 93LC56BT-I/MS, the 93AA56BT-I/MS supports lower-voltage operation down to 1.8 V while retaining identical pinout and command compatibility; versus AT25020B-MAHL-T, it offers hardware-ready signaling and Microwire simplicity but requires CS/CLK/DI/DO routing instead of SPI's standardized four-wire topology.
Availability
93AA56BT-I/MS is available at Aetrix Electronics and suitable for motor control parameter storage, smart sensor calibration memory, and PLC I/O module configuration requiring stable component supply across extended industrial temperature ranges and long production lifecycles.
Supply support for 93AA56BT-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 devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93XX series EEPROMs were designed specifically for low-power, space-constrained embedded systems requiring reliable nonvolatile storage with minimal pin count and robust data integrity - targeting industrial automation, automotive subsystems, and IoT endpoint devices.
FAQ
What is the memory organization of the 93AA56BT-I/MS?
The 93AA56BT-I/MS is a fixed 256 × 8-bit (2 Kbit) organization device. Unlike 'C' variants, it does not feature an ORG pin - confirming dedicated x8 operation. This matches the 'A' version designation in Microchip's device selection table and eliminates configuration ambiguity during system integration.
Does the 93AA56BT-I/MS require an external high-voltage supply for write operations?
No, the 93AA56BT-I/MS integrates an on-chip charge pump and performs all erase/write operations using only the standard VCC supply (1.8–5.5 V). No external VPP or programming voltage is needed - simplifying power design and eliminating high-voltage routing on PCBs.
How is Ready/Busy status monitored on the 93AA56BT-I/MS?
Ready/Busy status is monitored via the DO pin: logic low indicates ongoing erase/write, logic high signals completion. To sample status, CS must be brought high for ≥250 ns after the programming command, then the DO level read - no additional status register or command is required.
What package type is used for the 93AA56BT-I/MS?
93AA56BT-I/MS uses the 8-pin MSOP (Micro Small Outline Package) with 3.0 mm × 3.0 mm body and 0.65 mm lead pitch. The 'MS' suffix in the part number explicitly denotes MSOP packaging, confirmed by Microchip's package marking table and mechanical drawings in DS21794G.
Is the 93AA56BT-I/MS compatible with 1.8 V microcontrollers?
Yes, the 93AA56BT-I/MS operates across 1.8–5.5 V VCC and specifies VIH1 = 2.0 V (min) at VCC ≥2.7 V and VIH2 = 0.7×VCC at VCC < 2.7 V - ensuring reliable recognition of 1.8 V logic highs from modern ultra-low-voltage MCUs without level shifting.
93AA56BT-I/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
93AA56BT-I/MS FAQ
1.How can I place an order for 93AA56BT-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA56BT-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 93AA56BT-I/MS reliable?
The price and inventory of 93AA56BT-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 93AA56BT-I/MS is usually 5 days.
3.What payment methods are accepted for 93AA56BT-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA56BT-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA56BT-I/MS?
93AA56BT-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA56BT-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 93AA56BT-I/MS?
For technical support, including 93AA56BT-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA56BT-I/MS requirements.
6.How does Aetrix verify that 93AA56BT-I/MS is sourced from the original manufacturer or authorized distributors?
All 93AA56BT-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 93AA56BT-I/MS meets industry standards.
7.What is the process for return or replacement of 93AA56BT-I/MS?
All 93AA56BT-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 93AA56BT-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 93AA56BT-I/MS part is unused and in its original packaging.
Return procedure for 93AA56BT-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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