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Microchip Technology 93AA76C-I/ST
- Part No.:
- 93AA76C-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
93AA76C-I/ST.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,046
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Product details
Overview
93AA76C-I/ST from Microchip Technology Inc. is an 8Kbit, low-voltage, serial EEPROM with Microwire-compatible 3-wire interface, configurable 8-/16-bit word organization via ORG pin, and hardware write protection via dedicated PE pin. It operates from 1.8V to 5.5V across –40°C to +85°C, supports self-timed erase/write cycles, and delivers 1 million endurance cycles with >200-year data retention - used in industrial sensor calibration storage and embedded system configuration memory.
For engineers reviewing the 93AA76C-I/ST datasheet, 93AA76C-I/ST pinout, 93AA76C-I/ST application, or 93AA76C-I/ST equivalent, key selection considerations include VCC range compatibility (1.8–5.5V), ORG/PE pin control logic for memory width and write enable, Ready/Busy status polling via DO, sequential read capability, and TSSOP-8 package footprint constraints.
Technical Context
The 93AA76C-I/ST implements a synchronous serial Microwire interface with CS, CLK, DI, and DO signals, where instruction execution begins on detection of a Start condition (CS high + DI high at CLK rising edge). Memory organization is dynamically selected: ORG = VSS enables 1024 × 8-bit mode; ORG = VCC enables 512 × 16-bit mode.
Write operations require prior EWEN command and active-high PE signal; ERAL and WRAL instructions perform full-array erase/write with auto-erase. Device status is reported via DO pin during programming - low = busy, high = ready - and cleared by toggling CS after completion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (configurable as 1024 × 8 or 512 × 16) |
| VCC range | 1.8 V to 5.5 V - supports single-supply operation in battery-powered and mixed-voltage systems |
| Endurance | 1,000,000 erase/write cycles - suitable for frequent firmware parameter updates |
| Data retention | >200 years at 25°C - ensures long-term reliability in unattended equipment |
| Interface | 3-wire Microwire-compatible serial - minimal GPIO usage, no address bus required |
| Access time | Max 400 ns DO delay (TPD) at 1.8V - enables timing-critical host polling of Ready/Busy |
| Operating temp | –40°C to +85°C (Industrial grade) - validated for factory automation and outdoor electronics |
Pinout & Package
93AA76C-I/ST is supplied in an 8-pin TSSOP (Thin Shrink Small Outline Package) with 0.65 mm pitch, JEDEC MO-153 compliant, body size 4.4 mm × 3.0 mm × 1.2 mm, and Pb-free Matte Tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between commands to reset internal logic |
| CLK | Serial Clock | Rising-edge synchronized I/O; clock can be paused mid-transfer without state loss |
| DI | Data Input | Accepts Start bit, opcodes, addresses, and write data; tied to DO only with series resistor to avoid bus conflict |
| DO | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z on CS falling edge |
| VSS | Ground | Reference for all digital and analog circuitry; requires low-impedance connection to minimize noise coupling |
| ORG | Organization select | Hardwired to VSS or VCC to fix 8-bit or 16-bit word width; not sampled dynamically during operation |
| PE | Program Enable | Must be high to allow EWEN, ERASE, WRITE, WRAL; tied low for permanent write protection |
| VCC | Power supply | Supplies core logic and memory array; internal POR triggers at ~1.5 V to prevent partial writes |
Key Features
| Feature | Design Value |
|---|---|
| Configurable word size | Single hardware pin (ORG) selects between 8-bit and 16-bit access - eliminates need for software reconfiguration or dual-part BOMs |
| Dedicated write-protection | PE pin provides hardware-level lockout of all erase/write functions - prevents accidental corruption during power transients or firmware faults |
| Self-timed erase/write | No external timing components needed; internal logic manages auto-erase before write - simplifies host controller firmware |
| Ready/Busy status signaling | DO pin doubles as status indicator during programming - enables efficient polling without added pins or interrupts |
| Power-on/off data protection | Internal voltage detector disables writes below ~1.5 V - guarantees data integrity during brown-out or hot-plug events |
Applications
| Industrial Sensor Calibration | Embedded System Configuration |
|---|---|
Use Scenario: Storing temperature-compensation coefficients and sensor offset values in factory-calibrated pressure sensors. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed during power-up and field recalibration; uses sequential read for fast coefficient loading. Use Value: Enables one-time factory calibration with field-updatable parameters while maintaining immunity to power loss during write cycles. | Use Scenario: Holding boot configuration flags, network MAC addresses, and user preferences in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Serial configuration memory interfaced to MCU GPIOs; leverages ORG pin to match host data bus width (8- or 16-bit). Use Value: Reduces PCB footprint vs parallel EEPROM and avoids firmware complexity of software-emulated I²C/SPI protocols. |
| Medical Device Settings Storage | Automotive Body Control Module |
Use Scenario: Retaining therapy parameters and usage logs in portable infusion pumps operating on coin-cell batteries. IC Role / Device Role / Timing Role: Low-power nonvolatile memory; operates down to 1.8 V and draws ≤1 µA in standby - extends battery life. Use Value: Meets IEC 62304 Class C safety requirements via hardware write protection (PE pin) and proven 200-year data retention. | Use Scenario: Storing door lock actuator calibration data and lighting dimming profiles in vehicle BCMs. IC Role / Device Role / Timing Role: Industrial-temp EEPROM interfaced to 8-bit microcontroller; uses WRAL instruction for fast factory initialization. Use Value: Eliminates need for external voltage supervisors by integrating POR-based write inhibition - reduces BOM count and layout area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC76C-I/ST | VCC range 2.5–5.5 V; otherwise identical pinout, instruction set, and features | Not suitable for 1.8 V systems; requires higher minimum supply voltage | Select when system VCC never drops below 2.5 V and lower quiescent current at 3.3 V is prioritized |
| 93AA76C-I/SN | Same electrical specs and functionality; SOIC-8 package instead of TSSOP-8 | Larger footprint (4.9 × 3.9 mm vs 4.4 × 3.0 mm); less suitable for space-constrained layouts | Select when board assembly uses SOIC-compatible pick-and-place or legacy footprint reuse is required |
Compared with 93LC76C-I/ST and 93AA76C-I/SN, the 93AA76C-I/ST uniquely supports 1.8 V operation while maintaining identical feature set and TSSOP-8 packaging - making it optimal for ultra-low-voltage industrial designs where board area and supply flexibility are critical.
Availability
93AA76C-I/ST is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded system configuration, and medical device settings storage requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 93AA76C-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 microcontrollers, analog devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93XX76 family was designed specifically for cost-sensitive, low-power serial EEPROM applications in industrial, medical, and automotive systems - emphasizing hardware-configurable organization, robust data integrity, and wide supply voltage tolerance.
FAQ
What is the function of the ORG pin on the 93AA76C-I/ST?
The ORG pin on the 93AA76C-I/ST selects memory organization: tied to VSS (ground) configures 1024 × 8-bit mode; tied to VCC configures 512 × 16-bit mode. This hardware-selectable width eliminates software configuration overhead and ensures deterministic addressing. The 93AA76C-I/ST does not support dynamic reconfiguration - ORG must be fixed before operation begins.
How does the PE pin protect against unintended writes in the 93AA76C-I/ST?
The PE (Program Enable) pin on the 93AA76C-I/ST must be driven high to permit any erase or write operation - including EWEN, ERASE, WRITE, and WRAL. When PE is low, all programming functions are disabled regardless of command sequence. This hardware lockout prevents corruption during power-up transients, ESD events, or firmware errors. The 93AA76C-I/ST requires no additional external circuitry beyond a pull-down or pull-up resistor.
Can the 93AA76C-I/ST operate reliably at 1.8 V?
Yes, the 93AA76C-I/ST is fully specified for operation from 1.8 V to 5.5 V across the industrial temperature range (–40°C to +85°C). At 1.8 V, AC characteristics such as maximum clock frequency (1 MHz), TPD (400 ns), and TCSL (250 ns) remain guaranteed. Its low-voltage capability makes the 93AA76C-I/ST suitable for energy-harvesting and battery-powered applications where supply rails dip near 1.8 V.
What is the purpose of the Ready/Busy status on the DO pin of the 93AA76C-I/ST?
The DO pin of the 93AA76C-I/ST serves dual function: data output during READ and Ready/Busy status during programming. When CS is asserted after a write/erase command, DO goes low to indicate ongoing operation and returns high upon completion. This allows host microcontrollers to poll status without interrupts or timers - reducing firmware complexity. The 93AA76C-I/ST requires CS to be low ≥250 ns before checking status.
Does the 93AA76C-I/ST support sequential read, and how is it enabled?
Yes, the 93AA76C-I/ST supports sequential read: after issuing a READ command with an initial address, holding CS high causes automatic increment of the internal address counter and continuous output of subsequent memory locations on DO. No additional commands are needed - the host simply clocks CLK to advance through data. This feature reduces command overhead and accelerates bulk data retrieval in the 93AA76C-I/ST.
93AA76C-I/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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
93AA76C-I/ST FAQ
1.How can I place an order for 93AA76C-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA76C-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 93AA76C-I/ST reliable?
The price and inventory of 93AA76C-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 93AA76C-I/ST is usually 5 days.
3.What payment methods are accepted for 93AA76C-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA76C-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA76C-I/ST?
93AA76C-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA76C-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 93AA76C-I/ST?
For technical support, including 93AA76C-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA76C-I/ST requirements.
6.How does Aetrix verify that 93AA76C-I/ST is sourced from the original manufacturer or authorized distributors?
All 93AA76C-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 93AA76C-I/ST meets industry standards.
7.What is the process for return or replacement of 93AA76C-I/ST?
All 93AA76C-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 93AA76C-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 93AA76C-I/ST part is unused and in its original packaging.
Return procedure for 93AA76C-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93AA76C-I/ST Tags
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AT24C02C-XHM-T
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