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Microchip Technology 93AA76BT-I/SN
- Part No.:
- 93AA76BT-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93AA76BT-I/SN.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,908
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Product details
Overview
93AA76BT-I/SN from Microchip Technology is an 8Kbit, low-voltage, serial EEPROM with Microwire-compatible 3-wire interface, 1.8–5.5V supply range, industrial temperature rating (–40°C to +85°C), and SOIC-8 package. It features 1024 × 8-bit organization, self-timed erase/write cycles, 1M endurance, and >200-year data retention - used in embedded system configuration storage and sensor calibration data logging.
For engineers reviewing the 93AA76BT-I/SN datasheet, 93AA76BT-I/SN pinout, 93AA76BT-I/SN application, or 93AA76BT-I/SN equivalent, key selection considerations include VCC operating range, read/write timing compliance with Microwire protocol, standby current (<5 µA), Ready/Busy status polling via DO, and compatibility with microcontroller SPI peripherals configured for 3-wire mode.
Technical Context
This device implements a synchronous serial Microwire interface with CS, CLK, DI, and DO pins - no internal address counter reset on CS deassertion, supporting both random and sequential reads. It uses CMOS EEPROM cell technology with auto-erase before write, requiring EWEN/EWDS commands to enable/disable programming.
Unlike 'C' variants, the 93AA76B lacks ORG and PE pins, fixing memory organization to 1024 × 8-bit and enabling write operations unconditionally. Its instruction set includes READ, WRITE, ERASE, ERAL, EWEN, and EWDS, all executed via 22-clock-cycle sequences for x8 mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (1024 × 8-bit organization) |
| VCC range | 1.8 V to 5.5 V - supports single-supply operation across battery-powered and 3.3V/5V logic systems |
| Endurance | 1,000,000 erase/write cycles - suitable for frequent firmware parameter updates |
| Data retention | Greater than 200 years at 25°C - ensures long-term reliability in unattended equipment |
| Standby current | ≤5 µA at TA = –40°C to +85°C - enables ultra-low-power operation in sleep modes |
| Write cycle time | 5 ms typical (TWC) - defines minimum interval between successive WRITE commands |
| Max clock frequency | 3 MHz at VCC ≥ 4.5 V - sets upper limit for serial transaction throughput |
Pinout & Package
8-lead SOIC (SN) package with standard 150-mil body width, gull-wing leads, and Pb-free Matte Tin finish. Pin 1 marked by laser indentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions to reset internal logic |
| CLK | Serial Clock | Positive-edge synchronized timing input; stops/resumes freely during transmission |
| DI | Data Input | Receives Start bit, opcode, address, and data; requires stable setup/hold timing relative to CLK |
| DO | Data Output / Status | Outputs read data or Ready/Busy signal (low = busy); enters High-Z on CS falling edge |
| VSS | Ground | Reference return path for all I/O and core circuitry; must be low-impedance |
| VCC | Power Supply | Primary power rail; internal POR triggers at ~1.5 V - prevents spurious writes during brownout |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control - simplifies host firmware and reduces CPU overhead |
| Ready/Busy status on DO | Enables non-blocking polling instead of fixed-delay waits - improves system responsiveness |
| Industry-standard 3-wire interface | Reduces GPIO count vs. parallel EEPROMs - ideal for resource-constrained MCUs |
| Power-on/off data protection | Hardware-level write inhibition below VCC threshold - prevents corruption during power ramp |
| Sequential read capability | Allows burst read of multiple bytes with single CS assertion - accelerates configuration loading |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module Calibration |
|---|---|
Use Scenario: Storing I/O mapping tables and user-defined logic parameters that persist across power cycles in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding 8-bit per-address settings accessed via MCU's Microwire peripheral during boot and runtime reconfiguration. Use Value: Enables field-upgradable control logic without requiring external programming hardware or high-voltage programming signals. | Use Scenario: Retaining trim values for window lift motor current thresholds and mirror position offsets after vehicle battery disconnect. IC Role / Device Role / Timing Role: Dedicated 8Kbit parameter store interfaced to 8-bit automotive MCU over 3-wire bus; accessed during power-up initialization sequence. Use Value: Maintains calibrated behavior across battery replacements and ECU reflashes - critical for ASIL-B functional safety compliance. |
| Medical Infusion Pump Dose History Log | Smart Energy Meter Firmware Parameter Table |
Use Scenario: Recording cumulative dose delivery timestamps and error flags in Class II medical devices where data integrity is regulated under IEC 62304. IC Role / Device Role / Timing Role: Tamper-resistant event log storage with atomic write support; accessed only during safe maintenance windows. Use Value: Provides auditable treatment history traceability while meeting 200-year retention requirement for lifetime device records. | Use Scenario: Holding tariff schedules, CT/PT ratio configurations, and communication protocol keys in ANSI C12.22-compliant utility meters. IC Role / Device Role / Timing Role: Secure, low-power configuration vault updated infrequently but requiring guaranteed write completion under brownout conditions. Use Value: Ensures regulatory-compliant metering accuracy and remote firmware update resilience without external backup capacitors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC76BT-I/SN | 2.5–5.5 V VCC range; same pinout and x8 organization; identical instruction set and timing | Requires minimum 2.5 V - unsuitable for 1.8 V systems; otherwise drop-in replacement | Select when operating exclusively above 2.5 V and legacy design validation exists for 93LC series |
| AT25080B-MAHL-T | SPI interface (4-wire), 1.8–5.5 V, 8 Kbit (1024 × 8), 20 MHz max clock, built-in write protect | Uses different protocol - requires SPI driver adaptation; no Ready/Busy pin - relies on WIP flag polling | Choose for higher-speed serial access or when migrating to SPI-based platform architecture |
Compared with 93LC76BT-I/SN, the 93AA76BT-I/SN extends low-voltage operation down to 1.8 V while maintaining identical packaging and software compatibility; versus AT25080B-MAHL-T, it trades higher clock speed for deterministic Microwire timing and integrated status signaling without command overhead.
Availability
93AA76BT-I/SN is available at Aetrix Electronics and suitable for industrial automation, automotive subsystems, and medical device manufacturing requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 93AA76BT-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 is a leading provider of microcontrollers, analog, FPGA, and memory solutions, serving industrial, automotive, and consumer markets with vertically integrated silicon and development tools.
The 93AA76BT-I/SN belongs to Microchip's legacy 93XX serial EEPROM family, designed specifically for cost-sensitive, low-power embedded systems needing reliable nonvolatile storage with minimal pin count and firmware footprint.
FAQ
What is the memory organization of the 93AA76BT-I/SN?
The 93AA76BT-I/SN has a fixed 1024 × 8-bit (8 Kbit) organization. Unlike 'C' variants, it does not feature an ORG pin - so word size cannot be changed. This makes it functionally identical to the 'A' version in the 93AA76A/B/C family, with no 16-bit mode support. The 93AA76BT-I/SN is optimized for byte-oriented data storage in microcontroller-based systems.
Does the 93AA76BT-I/SN require an external Program Enable (PE) signal?
No, the 93AA76BT-I/SN does not have a PE pin and does not require external program enable logic. As a 'B' variant, it lacks both ORG and PE pins - write operations are always enabled after issuing the EWEN command. This simplifies PCB layout and eliminates the need for pull-up/pull-down resistors on PE, distinguishing it from the 93AA76CT-I/SN which requires PE = VCC for programming.
How is Ready/Busy status monitored on the 93AA76BT-I/SN?
Ready/Busy status is monitored on the DO pin: DO = low indicates ongoing erase/write operation; DO = high means the device is ready for the next command. To sample status, CS must be brought high for ≥250 ns after TCSL, then the DO level read on CLK edges. The 93AA76BT-I/SN does not support status polling during CS low - DO remains in High-Z until CS is asserted.
What is the minimum VCC required for reliable operation of the 93AA76BT-I/SN?
The 93AA76BT-I/SN requires VCC ≥ 1.8 V for full specification compliance across the industrial temperature range (–40°C to +85°C). Below ~1.5 V, internal power-on reset activates and inhibits all operations - preventing unintended writes during power ramp. This threshold is lower than 93LC/93C variants, making the 93AA76BT-I/SN uniquely suited for 1.8 V battery-powered designs.
Can the 93AA76BT-I/SN be used with standard SPI peripherals?
Yes, the 93AA76BT-I/SN can interface with standard SPI peripherals configured for 3-wire Microwire mode (CPOL = 0, CPHA = 0), using CS, CLK, DI, and DO lines. It does not use MOSI/MISO naming but maps directly: DI = MOSI, DO = MISO. No level-shifting is needed for 3.3 V or 5 V systems, and timing parameters (e.g., TCKH ≥ 200 ns at 1.8 V) align with common MCU SPI controllers.
93AA76BT-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 8Kbit
- Memory Organization:
- 512 x 16
- Memory Interface:
- Microwire
- Clock Frequency:
- 3 MHz
- Write Cycle Time - Word, Page:
- 5ms
- 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
93AA76BT-I/SN FAQ
1.How can I place an order for 93AA76BT-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA76BT-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 93AA76BT-I/SN reliable?
The price and inventory of 93AA76BT-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 93AA76BT-I/SN is usually 5 days.
3.What payment methods are accepted for 93AA76BT-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA76BT-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA76BT-I/SN?
93AA76BT-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA76BT-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 93AA76BT-I/SN?
For technical support, including 93AA76BT-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA76BT-I/SN requirements.
6.How does Aetrix verify that 93AA76BT-I/SN is sourced from the original manufacturer or authorized distributors?
All 93AA76BT-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 93AA76BT-I/SN meets industry standards.
7.What is the process for return or replacement of 93AA76BT-I/SN?
All 93AA76BT-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93AA76BT-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 93AA76BT-I/SN part is unused and in its original packaging.
Return procedure for 93AA76BT-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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