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Microchip Technology 93AA76T/SN
- Part No.:
- 93AA76T/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93AA76T/SN.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,445
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Product details
Overview
93AA76T/SN from Microchip Technology Inc. is an 8K-bit (1024 × 8 or 512 × 16) low-voltage serial EEPROM with Microwire interface, operating down to 1.8V and featuring ORG-pin-selectable memory organization, self-timed erase/write cycles, and Program Enable (PE) pin for hardware write protection. It delivers 1 mA typical active current, 5 µA standby current at 3.0V, and supports industrial temperature range (–40°C to +85°C) in 8-pin SOIC package.
For engineers reviewing the 93AA76T/SN datasheet, 93AA76T/SN pinout, 93AA76T/SN application, or 93AA76T/SN equivalent, this page provides verified technical context, validated pin functions, confirmed memory configuration behavior, real-world timing constraints (e.g., 3 MHz max clock at VCC ≥ 4.5V), and two rigorously cross-checked alternative parts for legacy design continuity.
Technical Context
The 93AA76T/SN implements a synchronous 3-wire Microwire-compatible serial interface with CS, CLK, DI, and DO signals. Its memory array supports dual organization modes: x8 (1024 words) or x16 (512 words), selected by the ORG pin voltage level-VSS selects x8, VCC selects x16-with internal pull-up ensuring x16 default when unconnected.
Operation requires explicit Erase/Write Enable (EWEN) before any ERASE or WRITE instruction; programming remains enabled until EWDS is issued or power is cycled. Ready/Busy status is actively signaled on the DO pin during self-timed erase/write cycles (3 ms typical per word, 15 ms max ERAL, 30 ms max WRAL), enabling polling-based firmware control without fixed delays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (1024 × 8 or 512 × 16), configurable via ORG pin - enables flexible data-width alignment in microcontroller systems. |
| Supply voltage | 1.8V to 6.0V - supports direct interfacing with 1.8V, 2.5V, 3.3V, and 5V logic domains without level shifters. |
| Max clock frequency | 3 MHz at VCC ≥ 4.5V; 2 MHz at 2.5V ≤ VCC < 4.5V; 1 MHz at 1.8V ≤ VCC < 2.5V - defines maximum serial throughput per supply condition. |
| Erase/write endurance | 1,000,000 cycles - ensures long-term reliability in firmware parameter storage or calibration data logging. |
| Data retention | 200 years at 25°C - guarantees nonvolatile data integrity across product lifecycle without refresh. |
| Active/standby current | 1 mA typical active (5.5V); 5 µA typical standby (3.0V) - enables ultra-low-power operation in battery-backed or energy-harvesting systems. |
| Interface protocol | Microwire 3-wire serial (CS/CLK/DI/DO) - compatible with legacy PIC® MCU peripherals and simple GPIO bit-banging implementations. |
Pinout & Package
93AA76T/SN is housed in an 8-pin narrow-body SOIC (SN) package per JEDEC MS-012, with 150 mil body width, 1.27 mm pitch, and Pb-free matte tin finish. Pin 1 is marked with a dot or bevel; orientation follows standard SOIC pin 1 indicator.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-high enable: must be held high for instruction execution; low forces Standby mode and places DO in high-Z; minimum 250 ns low time required between instructions. |
| 2 (CLK) | Serial Clock | Synchronizes all data transfers; rising edge clocks opcode/address/data in and data out; stopped mid-sequence without error; not required during self-timed erase/write. |
| 3 (DI) | Data Input | Accepts Start bit, opcode, address, and write data; tied to DO for single-line bus (with risk of conflict if A0 = high during dummy zero). |
| 4 (DO) | Data Output / Status | Outputs read data or Ready/Busy status (low = busy, high = ready); enters high-Z on CS falling edge; used for polling during erase/write. |
| 5 (VSS) | Ground | Reference return path for all signals and power; must be low-impedance connection to minimize noise coupling into serial interface. |
| 6 (PE) | Program Enable | Hardware write-protection: tied to VSS disables all erase/write; floating or VCC enables programming; internal pull-up defaults to enabled state. |
| 7 (VCC) | Power Supply | 1.8V–6.0V supply input; internal power-on/off protection inhibits programming below 1.4V; decoupling capacitor (0.1 µF) required near pin. |
| 8 (ORG) | Organization Select | Selects memory width: VSS = 1024 × 8, VCC = 512 × 16; internal pull-up ensures x16 mode if left unconnected. |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply 1.8V operation | Enables direct integration into modern ultra-low-voltage microcontroller systems without external regulators or level translators. |
| Hardware write protection (PE pin) | Prevents accidental firmware corruption during power transients or software faults by disabling all erase/write operations at silicon level. |
| Self-timed erase/write cycles | Eliminates need for precise timing loops in host firmware; host polls DO pin for completion instead of using fixed delays. |
| Automatic ERAL before WRAL | Ensures full memory initialization prior to bulk write, preventing partial writes or stale data remnants without requiring separate erase command. |
| Industry-standard Microwire interface | Guarantees interoperability with legacy PIC® MCU SSP modules and simplifies porting across Microchip's ecosystem without driver redesign. |
Applications
| Industrial Sensor Calibration Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and user-adjusted thresholds in portable blood glucose meters. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed at power-up and during field recalibration; uses sequential read and WRAL for fast profile updates. Use Value: 200-year data retention ensures calibration persistence over device lifetime; 1.8V operation matches low-power MCU supply rails. |
Use Scenario: Holding patient-specific therapy parameters and audit logs in implantable cardiac rhythm management devices. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter store with PE pin hardwired to VSS to prevent runtime modification during therapy delivery. Use Value: Hardware write protection eliminates risk of firmware-induced parameter corruption; 1M endurance supports frequent log updates. |
| Automotive Body Control Module Settings | Consumer Appliance User Preference Storage |
Use Scenario: Retaining seat/mirror position presets, lighting profiles, and door lock behavior in 12V automotive BCMs with local 3.3V LDO. IC Role / Device Role / Timing Role: Low-quiescent-current EEPROM interfaced via discrete GPIO bit-banging due to absence of dedicated SPI peripheral. Use Value: 5 µA standby current minimizes battery drain during vehicle sleep mode; SOIC-8 footprint fits constrained PCB layouts. |
Use Scenario: Saving cooking mode history, timer settings, and child-lock state in smart microwave ovens with cost-sensitive 8-bit MCUs. IC Role / Device Role / Timing Role: Serial configuration memory accessed only at boot and after user input; uses READ and WRITE with ORG = VSS for x8 simplicity. Use Value: Microwire compatibility reduces firmware overhead vs. SPI; 8-pin SOIC enables automated assembly and rework-friendly repair. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93AA76C/SN | Pin-compatible revision with enhanced ESD rating (6 kV HBM vs. 4 kV) and updated AC timing specs; same 8K-bit capacity and SOIC-8 package. | Required for new designs per Microchip notice; supports higher-reliability automotive and industrial environments where robustness is critical. | Select 93AA76C/SN for new projects; verify timing margins under worst-case VCC/temperature conditions per DS21130F rev F. |
| AT25080B-SSHL-T | 8K-bit SPI EEPROM (8,192 × 8), 2.5–5.5V supply, 20 MHz max clock, no ORG pin - fixed x8 organization and different instruction set. | Requires SPI interface and firmware rewrite; lacks hardware write protection (PE) and ORG flexibility but offers faster throughput. | Choose AT25080B-SSHL-T only if system already uses SPI peripherals and needs higher bandwidth; accept trade-off of no hardware-level write disable. |
Compared with 93AA76T/SN, the 93AA76C/SN offers improved robustness for new designs while maintaining identical pinout and software compatibility, whereas the AT25080B-SSHL-T trades Microwire simplicity and hardware protection for SPI speed and broader voltage tolerance - selection depends on interface availability and reliability requirements.
Availability
93AA76T/SN is available at Aetrix Electronics and suitable for industrial sensor calibration storage, medical device configuration memory, automotive body control module settings, and consumer appliance user preference storage requiring stable component supply across extended lifecycles.
Supply support for 93AA76T/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 components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93AA76T/SN belongs to Microchip's legacy Microwire EEPROM product line, designed specifically for cost-sensitive, low-power embedded systems requiring simple 3-wire nonvolatile storage with hardware write protection and wide supply voltage tolerance.
FAQ
What is the memory organization flexibility of the 93AA76T/SN?
The 93AA76T/SN supports two memory configurations: 1024 × 8-bit (x8) or 512 × 16-bit (x16), selected by the ORG pin voltage. When ORG is tied to VSS, x8 mode is active; when tied to VCC (or left floating, due to internal pull-up), x16 mode is selected. This allows designers to match data bus width without changing firmware architecture - a key advantage in mixed-signal MCU systems where memory access granularity affects code efficiency. The 93AA76T/SN datasheet confirms both modes operate across the full 1.8V–6.0V supply range.
How does the Program Enable (PE) pin protect against accidental writes in the 93AA76T/SN?
The PE pin on the 93AA76T/SN provides hardware-level write inhibition: tying PE to VSS disables all erase and write operations permanently, regardless of software commands. If PE is left floating or connected to VCC, programming is enabled - and an Erase/Write Enable (EWEN) instruction must precede any ERASE or WRITE command. This dual-layer protection (pin + instruction) prevents corruption during power glitches or firmware bugs. The 93AA76T/SN specification confirms PE has an internal pull-up, making VCC-default behavior safe for most applications unless explicit disable is required.
What timing parameters govern reliable communication with the 93AA76T/SN at 3.3V supply?
At VCC = 3.3V, the 93AA76T/SN supports up to 2 MHz clock frequency (per Table 1-2), with minimum clock high/low times of 300 ns/200 ns respectively. Chip select setup/hold times are 100 ns/0 ns, and data input setup/hold require 100 ns each. These values ensure signal integrity when interfacing with common 3.3V MCUs like PIC16F/LF or STM32L0. All timing is referenced to 0.5×VCC, and the 93AA76T/SN's DO pin provides Ready/Busy status to eliminate reliance on fixed delays during erase/write - a critical design consideration for deterministic firmware.
Is the 93AA76T/SN suitable for automotive applications, and what temperature range does it support?
The 93AA76T/SN is rated for commercial (0°C to +70°C) and industrial (–40°C to +85°C) temperature ranges, with the "/T" suffix indicating tape-and-reel packaging and extended temperature capability. While not AEC-Q200 qualified, its –40°C to +85°C operation, 4 kV ESD rating, and robust power-on/off protection make it suitable for non-safety-critical automotive subsystems such as body control modules, HVAC interfaces, and infotainment settings storage - provided system-level validation confirms performance under real-world thermal cycling and vibration. The 93AA76T/SN datasheet explicitly lists these ranges in Section 5.0.
How does the 93AA76T/SN handle power transitions to prevent data corruption?
The 93AA76T/SN incorporates built-in power transition protection: programming modes are inhibited until VCC rises above 1.4V during power-up, and automatically disabled when VCC falls below 1.4V during power-down. This prevents partial writes or erase cycles during brown-out conditions. Additionally, the device powers up in Erase/Write Disable (EWDS) state, requiring an explicit EWEN command before any programming - adding software-level safety. These features are documented in Sections 2.3 and 2.4 of the 93AA76T/SN datasheet and apply across all supported supply voltages (1.8V–6.0V).
93AA76T/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:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 8Kbit
- Memory Organization:
- 1K x 8, 512 x 16
- Memory Interface:
- Microwire
- Clock Frequency:
- 3 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 1.8V ~ 6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
93AA76T/SN FAQ
1.How can I place an order for 93AA76T/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA76T/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 93AA76T/SN reliable?
The price and inventory of 93AA76T/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93AA76T/SN is usually 5 days.
3.What payment methods are accepted for 93AA76T/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA76T/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA76T/SN?
93AA76T/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA76T/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 93AA76T/SN?
For technical support, including 93AA76T/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA76T/SN requirements.
6.How does Aetrix verify that 93AA76T/SN is sourced from the original manufacturer or authorized distributors?
All 93AA76T/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 93AA76T/SN meets industry standards.
7.What is the process for return or replacement of 93AA76T/SN?
All 93AA76T/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93AA76T/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 93AA76T/SN part is unused and in its original packaging.
Return procedure for 93AA76T/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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