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Microchip Technology 93AA76CT-I/ST
- Part No.:
- 93AA76CT-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
93AA76CT-I/ST.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,406
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Product details
Overview
93AA76CT-I/ST from Microchip Technology Inc. is an 8Kbit, low-voltage, serial Microwire-compatible EEPROM with configurable 8-/16-bit word organization via the ORG pin, program enable (PE) write protection, and industrial temperature range (–40°C to +85°C). It operates from 1.8V to 5.5V, supports self-timed erase/write cycles, and delivers 1,000,000 endurance cycles with >200-year data retention - used in embedded system configuration storage and sensor calibration data logging.
For engineers reviewing the 93AA76CT-I/ST datasheet, 93AA76CT-I/ST pinout, 93AA76CT-I/ST application, or 93AA76CT-I/ST equivalent, key selection considerations include its 8-lead TSSOP package (ST), ORG/PE pin dependency for memory configuration and write-enable control, Microwire protocol timing compliance down to 1.8V, and industrial-grade reliability for nonvolatile parameter storage in power-constrained edge devices.
Technical Context
The 93AA76CT-I/ST implements a synchronous 3-wire Microwire interface (CS, CLK, DI/DO) with dedicated ORG and PE pins enabling runtime reconfiguration between 1024×8-bit and 512×16-bit memory maps and hardware-gated write access. Its internal logic enforces automatic ERAL before WRAL, status polling via DO pin (Ready/Busy), and power-on/off data protection triggered at VCC <1.5V.
It uses advanced CMOS process technology to achieve ultra-low standby current (1 µA typical) and read/write currents scalable across voltage ranges - 1 µA at 2.5V/2 MHz read, 3 µA at 2.5V/2 MHz write - while maintaining full AC timing compliance per Table 1-2 across 1.8–5.5V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1024 × 8-bit or 512 × 16-bit, selectable via ORG pin) |
| VCC Range | 1.8 V to 5.5 V - enables direct interfacing with 1.8V, 3.3V, and 5V microcontrollers without level shifters |
| Endurance | 1,000,000 erase/write cycles - supports frequent field-updatable calibration or logging in industrial controllers |
| Data Retention | >200 years at 25°C - ensures long-term integrity of stored device identifiers or security keys |
| Write Cycle Time | 5 ms (TWC) - deterministic programming latency critical for time-bound firmware update sequences |
| Operating Temp | –40°C to +85°C (Industrial grade) - qualified for deployment in factory automation and outdoor metering |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - minimal GPIO usage on host MCU |
Pinout & Package
8-lead TSSOP package (ST suffix), 3.0 mm × 4.4 mm body, 0.65 mm pitch, Pb-free Matte Tin finish. Pin 1 marked by laser dot; exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions to reset internal state |
| CLK | Serial Clock | Rising-edge synchronized I/O; clock-stoppable during transmission for host timing flexibility |
| DI | Data Input | Accepts Start bit, opcode, address, and write data; requires logic-low setup before CS high |
| DO | Data Output / Status | Tri-state output delivering read data or Ready/Busy signal (low = busy); enters High-Z on CS falling edge |
| VSS | Ground | Reference return path for all digital and analog functions; must be low-impedance |
| ORG | Organization Control | Logic-high → 512×16-bit mode; logic-low → 1024×8-bit mode; must be fixed before operation |
| PE | Program Enable | Logic-high required to execute ERASE/WRITE/WRAL; tied low to permanently disable writes |
| VCC | Power Supply | 1.8–5.5 V input; internal POR circuit triggers at ~1.5 V to prevent partial writes during brownout |
Key Features
| Feature | Design Value |
|---|---|
| Word-size configurability | Single hardware pin (ORG) selects 8-bit or 16-bit data bus width - eliminates need for software remapping or external multiplexing |
| Hardware write protection | Dedicated PE pin disables all erase/write operations when held low - prevents accidental corruption during power transitions or firmware faults |
| Self-timed erase/write | No external timing components needed; internal logic manages auto-erase before write - simplifies host driver design and reduces CPU overhead |
| Ready/Busy status signaling | DO pin doubles as status indicator during programming - enables efficient polling without additional GPIO or interrupt lines |
| Low-voltage operation | Fully functional down to 1.8 V with guaranteed AC timing - supports battery-powered IoT nodes and energy-harvesting systems |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients and linearization tables for pressure and temperature sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with infrequent writes and high-read reliability; accessed during sensor initialization and periodic self-test. Use Value: Eliminates need for external trimming potentiometers or OTP fuses; enables field recalibration and multi-sensor traceability via unique stored IDs. | Use Scenario: Holding user-configurable alarm thresholds, display brightness settings, and patient-specific therapy parameters in portable infusion pumps. IC Role / Device Role / Timing Role: Secure, low-power configuration memory accessed at boot and during UI interaction; write-protected via PE pin during normal operation. Use Value: Ensures regulatory-compliant data persistence across battery swaps and cold starts; supports audit-log timestamping with write-cycle endurance margin. |
| Automotive Body Control Module | Smart Energy Meter Firmware Patch Storage |
Use Scenario: Retaining door lock/unlock preferences, mirror position memory, and lighting profiles in 12V automotive BCMs operating across –40°C to +85°C. IC Role / Device Role / Timing Role: Industrial-temp EEPROM interfaced directly to 3.3V MCU; ORG pin hardwired for 8-bit access to match MCU data bus. Use Value: Meets AEC-Q100 stress requirements via qualified packaging (TSSOP-ST); PE pin tied to MCU GPIO for dynamic write-enable during service mode only. | Use Scenario: Storing signed firmware patch images and version metadata in utility-grade smart meters with tamper-detection requirements. IC Role / Device Role / Timing Role: Secure boot auxiliary storage holding encrypted delta updates; accessed only during verified OTA update sequence. Use Value: Leverages >200-year retention and 1M-cycle endurance for decade-long field deployments; WRAL instruction enables atomic full-array reprogramming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93AA76C-I/MS | Same die, 8-lead MSOP package (3.0 × 3.0 mm); identical electrical specs and pinout except physical footprint | Preferred for space-constrained PCBs where TSSOP height clearance is limited; same thermal profile and assembly process | Select when board area is constrained but same industrial temp and Microwire compatibility are required |
| 93LC76CT-I/ST | VCC range 2.5–5.5 V (vs. 1.8–5.5 V); otherwise identical pinout, instruction set, and timing; no change in ORG/PE functionality | Suitable for legacy 3.3V/5V-only systems; cannot operate below 2.5V - excludes 1.8V MCU interfaces | Choose only if system VCC never drops below 2.5V; avoid for mixed-voltage or battery-backed designs |
Compared with 93AA76CT-I/ST, the 93AA76C-I/MS offers identical functionality in a smaller MSOP footprint ideal for dense layouts, while the 93LC76CT-I/ST sacrifices 1.8V operation for tighter VCC regulation tolerance - making the 93AA76CT-I/ST the sole choice for true wide-voltage, low-power embedded use cases.
Availability
93AA76CT-I/ST is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control modules, and smart energy meter firmware patch storage requiring stable component supply across extended product lifecycles.
Supply support for 93AA76CT-I/ST 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 microcontroller, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design, manufacturing, and sales operations.
The 93XX76 family was designed specifically for cost-sensitive, low-power nonvolatile memory applications requiring Microwire protocol compatibility, hardware write protection, and industrial temperature resilience - targeting embedded systems where reliability and voltage flexibility outweigh SPI speed demands.
FAQ
What is the function of the ORG pin on the 93AA76CT-I/ST?
The ORG pin on the 93AA76CT-I/ST selects memory organization: logic high configures the device as 512 × 16-bit, logic low as 1024 × 8-bit. This pin must be driven to a valid logic level (VCC or VSS) before any instruction execution; floating is not permitted. The 93AA76CT-I/ST requires this pin to be externally biased, unlike A/B variants which fix organization permanently.
How does the PE pin protect against unintended writes in the 93AA76CT-I/ST?
The PE (Program Enable) pin on the 93AA76CT-I/ST must be held high to allow ERASE, WRITE, or WRAL operations; tying it low disables all programming functions permanently. Unlike software-based locks, this hardware gate prevents corruption during brownout, reset, or firmware crashes. The 93AA76CT-I/ST datasheet mandates PE be fixed - not toggled - during normal operation to ensure robustness.
What is the minimum VCC required for reliable operation of the 93AA76CT-I/ST?
The 93AA76CT-I/ST guarantees full functionality down to 1.8 V across the industrial temperature range. Its internal power-on reset (POR) circuit activates at approximately 1.5 V to inhibit all operations until VCC stabilizes above specification - preventing partial writes or corrupted reads during power ramp-up or brownout events. This 1.8 V minimum enables direct integration with modern ultra-low-power MCUs.
Can the 93AA76CT-I/ST be used in place of a standard SPI EEPROM?
The 93AA76CT-I/ST implements Microwire protocol - a subset of SPI with single-data-line (DI/DO shared or separate) and specific opcode/address framing - not standard SPI mode 0/1/2/3. While pin-compatible with many SPI EEPROMs in TSSOP-8, its command set, timing (e.g., TWC = 5 ms), and ORG/PE pin dependencies require dedicated driver code. Direct replacement without firmware adaptation is not supported.
What package type does the 'ST' suffix indicate for the 93AA76CT-I/ST?
The 'ST' suffix in 93AA76CT-I/ST denotes the 8-lead Thin Shrink Small Outline Package (TSSOP), measuring 3.0 mm × 4.4 mm with 0.65 mm lead pitch and Pb-free Matte Tin finish. This package is explicitly listed in the Device Selection Table for the 93AA76C variant and matches the pinout shown in Figure "TSSOP/MSOP" on DS21796M-page 2. It is distinct from SOIC (SN), PDIP (P), or MSOP (MS) variants.
93AA76CT-I/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm 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:
- 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 ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
93AA76CT-I/ST FAQ
1.How can I place an order for 93AA76CT-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA76CT-I/ST 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 93AA76CT-I/ST reliable?
The price and inventory of 93AA76CT-I/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93AA76CT-I/ST is usually 5 days.
3.What payment methods are accepted for 93AA76CT-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA76CT-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA76CT-I/ST?
93AA76CT-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA76CT-I/ST 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 93AA76CT-I/ST?
For technical support, including 93AA76CT-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA76CT-I/ST requirements.
6.How does Aetrix verify that 93AA76CT-I/ST is sourced from the original manufacturer or authorized distributors?
All 93AA76CT-I/ST 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 93AA76CT-I/ST meets industry standards.
7.What is the process for return or replacement of 93AA76CT-I/ST?
All 93AA76CT-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 93AA76CT-I/ST, 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 93AA76CT-I/ST part is unused and in its original packaging.
Return procedure for 93AA76CT-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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