My Inquiry
My Account
Microchip Technology 93AA56BT-I/MC
- Part No.:
- 93AA56BT-I/MC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
93AA56BT-I/MC.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,777
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
93AA56BT-I/MC from Microchip Technology Inc. is a 2 Kbit low-voltage serial EEPROM with 256 × 8-bit organization, Microwire-compatible 3-wire interface (CS/CLK/DI/DO), 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 - used for configuration storage in microcontroller-based embedded systems.
For engineers reviewing the 93AA56BT-I/MC datasheet, 93AA56BT-I/MC pinout, 93AA56BT-I/MC application, or 93AA56BT-I/MC equivalent, key selection criteria include VCC range (1.8–5.5 V), 8-pin DFN package (MC), absence of ORG pin (fixed x8 mode), Ready/Busy status via DO, and compatibility with legacy Microwire controllers requiring minimal GPIO overhead.
Technical Context
The 93AA56BT-I/MC implements a synchronous serial Microwire interface with start-bit detection, opcode-driven command set (READ/WRIT/ERASE/ERAL/WRAL/EWEN/EWDS), and internal auto-erase-before-write logic. All operations are initiated by CS high-to-low transition after valid instruction framing.
It uses CMOS EEPROM memory array with on-chip voltage pump for write/erase, supports sequential read, and provides Ready/Busy polling via DO pin during programming - no external timing components required. Power-down behavior includes automatic EWDS entry and POR lockout below 1.5 V.
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 - enables direct interfacing with 1.8 V, 3.3 V, and 5 V logic domains without level shifters |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI, DO) - requires only 4 GPIOs, no SPI hardware needed |
| Endurance | 1,000,000 erase/write cycles - suitable for frequent calibration or runtime parameter logging |
| Data retention | >200 years at 25°C - ensures long-term reliability in unattended equipment |
| Write cycle time | 6 ms typical (TWC) - deterministic timing for firmware timeout handling |
| Operating temp | –40°C to +85°C (Industrial grade) - validated for industrial control, metering, and automotive body electronics |
Pinout & Package
8-pin 2×3 mm DFN package (MC suffix), exposed pad (may be connected to VSS or left floating), Pb-free Matte Tin finish.
| 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 | Synchronizes all data transfers; rising-edge sampling for DI/DO; stoppable mid-transfer |
| 3 - DI | Data Input | Accepts start bit, opcodes, addresses, and write data; compatible with shared DI/DO bus using pull-up resistor |
| 4 - DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z when CS low or during non-read states |
| 5 - NC | No Connection | Internally unconnected; must be left floating or tied to VSS per layout best practice |
| 6 - ORG/NC | Organization Select / No Connect | NC on 93AA56B variants - confirms fixed 16-bit word size is not applicable; pin is unused |
| 7 - VSS | Ground | Reference for all I/O and internal circuitry; connect exposed pad to VSS for thermal and EMI performance |
| 8 - VCC | Power Supply | 1.8–5.5 V supply; internal POR circuit locks writes below 1.5 V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control or firmware delays - host polls DO for completion |
| Automatic ERAL before WRAL | Guarantees full-array erase prior to bulk write, preventing stale data corruption without software intervention |
| Power-on/off data protection | Hardware-enforced write inhibition below 1.5 V VCC, preventing partial writes during brown-out or power ramp |
| Ready/Busy status on DO | Enables efficient polling instead of fixed-delay waits - reduces CPU idle time and improves system responsiveness |
| Industry-standard Microwire interface | Direct drop-in replacement for legacy 93XX series; no protocol translation or driver modification required |
Applications
| Motor Control Configuration | Smart Sensor Calibration Storage |
|---|---|
Use Scenario: Storing motor phase alignment offsets, current limit thresholds, and PID tuning parameters in BLDC motor drives. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed at startup and during field updates via MCU GPIO bit-banged Microwire. Use Value: Enables field-reprogrammable motor profiles without requiring flash reprogramming or external programming hardware. | Use Scenario: Retaining factory-calibrated sensor gain/offset coefficients and temperature compensation tables in industrial pressure transmitters. IC Role / Device Role / Timing Role: Dedicated calibration memory mapped to MCU I/O pins; read once at boot, written only during calibration procedure. Use Value: Eliminates need for recalibration after power loss and supports multi-point NIST-traceable calibration storage. |
| IoT Edge Device Identity | Medical Diagnostic Equipment Settings |
Use Scenario: Securely storing unique device identifiers (MAC, serial number), TLS certificate fingerprints, and firmware version history in battery-powered gateways. IC Role / Device Role / Timing Role: Tamper-resistant identity vault accessed exclusively by secure bootloader during boot authentication. Use Value: Provides immutable device identity with >200-year data retention, critical for zero-touch provisioning and regulatory compliance. | Use Scenario: Saving user-selected diagnostic modes, display brightness, language preference, and safety interlock configurations in portable ultrasound units. IC Role / Device Role / Timing Role: Human-interface configuration store updated via UI controller; retains settings across AC power cycles and battery swaps. Use Value: Ensures consistent clinical workflow and meets IEC 62304 requirements for persistent user preferences without DRAM backup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93AA56AT-I/MC | Same 256 × 8-bit organization, but A-version (no ORG pin); identical VCC, timing, and package | Functionally identical; differs only in marking code and internal revision - fully interchangeable | Select when exact marking compliance or legacy BOM alignment is required |
| 93LC56BT-I/MC | 2.5–5.5 V VCC range (vs. 1.8–5.5 V); otherwise identical pinout, timing, and instruction set | Not suitable for 1.8 V systems; requires minimum 2.5 V - use only if system VCC never drops below 2.5 V | Choose for higher-voltage-only designs where tighter VCC tolerance is acceptable |
Compared with 93AA56AT-I/MC, the 93AA56BT-I/MC offers identical functionality with minor traceability differences; versus 93LC56BT-I/MC, it adds 1.8 V operation critical for ultra-low-power IoT nodes, while maintaining full software and layout compatibility.
Availability
93AA56BT-I/MC is available at Aetrix Electronics and suitable for motor control configuration, smart sensor calibration storage, IoT edge device identity, and medical diagnostic equipment settings requiring stable component supply across extended product lifecycles.
Supply support for 93AA56BT-I/MC 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 93AA56BT-I/MC belongs to Microchip's legacy 93XX serial EEPROM family, designed specifically for cost-sensitive, low-power embedded systems requiring reliable nonvolatile storage with minimal pin count and software overhead.
FAQ
What is the memory organization of the 93AA56BT-I/MC?
The 93AA56BT-I/MC has a fixed 256 × 8-bit organization (x8 mode). As a 'B' variant, it does not include an ORG pin - confirming dedicated 16-bit communication is not supported. This distinguishes it from 'C' versions which use ORG to select between x8/x16 modes. The 93AA56BT-I/MC is optimized for byte-oriented access in resource-constrained microcontroller systems.
Does the 93AA56BT-I/MC require external timing components for write operations?
No, the 93AA56BT-I/MC performs self-timed erase and write cycles internally. After issuing a WRITE or ERASE command and lowering CS, the device executes the full auto-erase-and-program sequence autonomously in 6 ms (typical). Host firmware only needs to poll the DO pin for Ready/Busy status - no external capacitors, clocks, or delay loops are required, simplifying design and improving reliability.
Can the 93AA56BT-I/MC operate at 1.8 V supply voltage?
Yes, the 93AA56BT-I/MC supports a VCC range of 1.8 V to 5.5 V, making it compatible with modern ultra-low-power microcontrollers and battery-operated devices. Its power-on reset circuit inhibits writes below 1.5 V, ensuring data integrity during brown-out conditions. This 1.8 V capability is a key differentiator from the 93LC56BT-I/MC (2.5–5.5 V only) and enables direct integration into 1.8 V I/O domains.
What package type does the 93AA56BT-I/MC use, and what are its layout considerations?
The 93AA56BT-I/MC uses an 8-pin 2×3 mm DFN package (MC suffix) with an exposed thermal pad. The pad may be connected to VSS for improved thermal dissipation and EMI performance, or left floating if board space is constrained. Pin 5 is NC and should be left unconnected; Pin 6 is ORG/NC and is unused on this B-version - both pins must not be tied to active signals to avoid unintended behavior.
How does the Ready/Busy status function on the 93AA56BT-I/MC?
The DO pin of the 93AA56BT-I/MC serves dual purpose: data output during READ and Ready/Busy status during programming. When CS is brought high after ≥250 ns low (TCSL), DO goes low to indicate ongoing erase/write and high when complete. This allows efficient polling without fixed delays. After completion, issuing a Start bit followed by CS low clears the status flag - a critical step before subsequent commands.
93AA56BT-I/MC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- 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-DFN (2x3)
93AA56BT-I/MC FAQ
1.How can I place an order for 93AA56BT-I/MC through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA56BT-I/MC 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/MC reliable?
The price and inventory of 93AA56BT-I/MC 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/MC is usually 5 days.
3.What payment methods are accepted for 93AA56BT-I/MC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA56BT-I/MC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA56BT-I/MC?
93AA56BT-I/MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA56BT-I/MC 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/MC?
For technical support, including 93AA56BT-I/MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA56BT-I/MC requirements.
6.How does Aetrix verify that 93AA56BT-I/MC is sourced from the original manufacturer or authorized distributors?
All 93AA56BT-I/MC 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/MC meets industry standards.
7.What is the process for return or replacement of 93AA56BT-I/MC?
All 93AA56BT-I/MC units undergo pre-shipment inspection (PSI). If there is an issue with 93AA56BT-I/MC, 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/MC part is unused and in its original packaging.
Return procedure for 93AA56BT-I/MC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93AA56BT-I/MC Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
