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Microchip Technology 93AA76A-I/SN
- Part No.:
- 93AA76A-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93AA76A-I/SN.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,866
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Product details
Overview
93AA76A-I/SN from Microchip Technology is an 8Kbit, 1024 × 8-bit serial EEPROM with Microwire-compatible 3-wire interface (CS/CLK/DI/DO), operating across 1.8–5.5V supply, rated for -40°C to +85°C industrial temperature range, and packaged in 8-lead SOIC (SN). It delivers 1 million erase/write cycles and >200 years data retention for nonvolatile parameter storage in embedded control systems.
For engineers reviewing the 93AA76A-I/SN datasheet, 93AA76A-I/SN pinout, 93AA76A-I/SN application, or 93AA76A-I/SN equivalent, key selection considerations include its fixed 8-bit organization (no ORG pin), absence of PE pin, self-timed write/erase, Ready/Busy status via DO, and compatibility with low-voltage microcontroller I/O.
Technical Context
This device implements a synchronous serial Microwire protocol with start-bit detection, opcode-driven instruction set (READ, WRITE, ERASE, EWEN/EWDS), and automatic ERAL-before-WRAL sequencing. It uses internal charge-pump circuitry for high-voltage programming without external VPP.
Memory access is controlled by CS-active-high enable, CLK-synchronized bit transfer on rising edges, and DO-driven Ready/Busy polling during self-timed operations. Power-on reset and voltage-detect circuitry (VPOR = 1.5V) ensure data integrity during brown-out conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (1024 × 8-bit organization - fixed, no ORG pin) |
| Supply voltage | 1.8–5.5 V - supports direct interface with 1.8V, 3.3V, and 5V logic domains |
| Endurance | 1,000,000 erase/write cycles - enables frequent calibration or logging updates |
| Data retention | >200 years at 25°C - ensures long-term firmware or configuration persistence |
| Max clock frequency | 3 MHz at VCC ≥4.5V - defines maximum serial transaction throughput |
| Write cycle time | 5 ms typical - determines minimum latency between successive writes |
| Standby current | 1 µA at TA = 25°C - critical for battery-powered or energy-harvesting applications |
Pinout & Package
8-lead SOIC (SN) package with standard 1.27 mm pitch; RoHS-compliant matte tin finish; exposed pad not present (unlike DFN/TDFN variants).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS | Chip Select | Active-high enable: must be held high for entire instruction sequence; minimum 250 ns low time required between commands |
| 2 CLK | Serial Clock | Rising-edge synchronized timing for all bit transfers; stoppable mid-sequence without corruption |
| 3 DI | Data Input | Receives start bit, opcode, address, and write data; requires pull-down if unused |
| 4 DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z when CS low or after status read |
| 5 VSS | Ground | Reference return path for all signals and internal charge pump |
| 6 - | No connect | Pin 6 is unconnected - not ORG or PE (exclusive to 'C' variants) |
| 7 - | No connect | Pin 7 is unconnected - not ORG or PE (exclusive to 'C' variants) |
| 8 VCC | Power Supply | Supplies core logic and internal programming voltage generation; VPOR threshold = 1.5 V |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control or watchdog timeout management in host firmware |
| Ready/Busy status on DO | Enables efficient polling instead of fixed-delay waits, reducing CPU overhead and power consumption |
| Power-on/off data protection | Hardware-enforced write inhibition below 1.5 V prevents corruption during power ramp-up/down |
| Sequential read mode | Allows continuous burst reads across memory addresses with single CS assertion - improves read throughput |
| Industry-standard 3-wire interface | Minimizes GPIO usage and PCB routing complexity versus SPI or I²C alternatives |
Applications
| Industrial Sensor Calibration | Automotive Body Control Module |
|---|---|
Use Scenario: Storing factory-trimmed sensor offset/gain coefficients and real-time temperature compensation tables in HVAC or pressure transducers. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with infrequent writes and frequent reads; operates during MCU boot before full system initialization. Use Value: Eliminates external trimming components and enables field recalibration without hardware modification. | Use Scenario: Retaining user preferences (seat position, mirror angle, lighting presets) and fault log history in door modules or junction boxes. IC Role / Device Role / Timing Role: Low-power parameter store accessed only during wake-up or power-down sequences; survives battery disconnect. Use Value: Maintains personalized settings across ignition cycles with guaranteed 200-year data retention. |
| Medical Infusion Pump Settings | Smart Energy Meter Firmware Patch Storage |
Use Scenario: Holding regulatory-compliant dosage limits, alarm thresholds, and audit trail metadata in Class II medical devices. IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration vault; write-protected except during authenticated service mode. Use Value: Meets IEC 62304 data integrity requirements without software-level encryption overhead. | Use Scenario: Storing field-upgradable firmware patches and tariff schedule tables in ANSI C12.22-compliant electricity meters. IC Role / Device Role / Timing Role: High-endurance update buffer that accepts daily patch writes while preserving meter calibration constants. Use Value: Enables remote firmware evolution without replacing main MCU or risking bricking during power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC76A-I/SN | VCC range 2.5–5.5 V; same 1024×8 organization, pinout, and instruction set; no VPOR at 1.8 V | Not suitable for 1.8 V systems; otherwise drop-in compatible in 3.3 V/5 V designs | Select when operating exclusively above 2.5 V and requiring Microchip's extended qualification for automotive-grade traceability |
| AT25080B-SSHL-T | SPI interface (4-wire), 8 Kbit (1024×8), 1.8–5.5 V, 20 MHz max clock; no Ready/Busy pin - uses WIP flag in status register | Requires SPI peripheral instead of generic GPIO bit-banging; higher throughput but added software complexity | Choose for systems with dedicated SPI hardware and need for faster sequential reads or simultaneous status interrogation |
Compared with 93LC76A-I/SN, the 93AA76A-I/SN supports lower-voltage operation down to 1.8 V, enabling direct integration with ultra-low-power MCUs; compared with AT25080B-SSHL-T, it uses simpler 3-wire control and provides immediate hardware-ready signaling without status register polling.
Availability
93AA76A-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, medical infusion pump settings, and smart energy meter firmware patch storage requiring stable component supply and long-lifecycle support.
Supply support for 93AA76A-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 Inc. is a leading provider of microcontrollers, analog devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93AA76A belongs to Microchip's legacy 93XX serial EEPROM product line, designed specifically for cost-sensitive, low-pin-count embedded systems requiring reliable nonvolatile storage with minimal external components and broad voltage compatibility.
FAQ
What is the memory organization of the 93AA76A-I/SN?
The 93AA76A-I/SN features a fixed 1024 × 8-bit (8 Kbit) organization. Unlike 'C' variants, it has no ORG pin and does not support 16-bit word mode. This simplifies hardware design by eliminating external configuration logic and guarantees consistent byte-oriented addressing for all host firmware implementations.
Does the 93AA76A-I/SN have a Program Enable (PE) pin?
No, the 93AA76A-I/SN does not include a PE pin. Programming is always enabled - write protection relies solely on the EWEN/EWDS instruction sequence. This differs from 93AA76C variants, where PE must be pulled high to allow writes. Host firmware must explicitly issue EWEN before any erase or write command and EWDS afterward to prevent accidental modification.
What is the minimum supply voltage required for reliable operation of the 93AA76A-I/SN?
The 93AA76A-I/SN operates reliably down to 1.8 V, with a power-on reset threshold (VPOR) of 1.5 V. Below 1.8 V, read and write functions are disabled, and the device remains in standby. This 1.8 V minimum enables direct interfacing with modern ultra-low-power MCUs such as PIC16LF1xxx or EFM32 Zero Gecko families without level-shifting.
How is Ready/Busy status indicated on the 93AA76A-I/SN?
Ready/Busy status is signaled directly on the DO pin: logic low indicates an erase or write operation is in progress; logic high confirms completion. To sample status, CS must be brought high for at least 250 ns after TCSL, then DO is sampled on the next CLK rising edge. No status register or additional commands are required - this hardware-level signaling reduces firmware complexity.
Can the 93AA76A-I/SN be used in place of the 93LC76A-I/SN?
Yes, the 93AA76A-I/SN is functionally and pin-compatible with the 93LC76A-I/SN in 3.3 V and 5 V systems, sharing identical pinout, instruction set, and 1024×8 organization. However, the 93AA76A-I/SN extends operational range down to 1.8 V and specifies VPOR at 1.5 V, making it suitable for wider voltage-margin designs where the 93LC76A-I/SN would reset prematurely.
93AA76A-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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
- 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
93AA76A-I/SN FAQ
1.How can I place an order for 93AA76A-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA76A-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 93AA76A-I/SN reliable?
The price and inventory of 93AA76A-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 93AA76A-I/SN is usually 5 days.
3.What payment methods are accepted for 93AA76A-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA76A-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA76A-I/SN?
93AA76A-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA76A-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 93AA76A-I/SN?
For technical support, including 93AA76A-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA76A-I/SN requirements.
6.How does Aetrix verify that 93AA76A-I/SN is sourced from the original manufacturer or authorized distributors?
All 93AA76A-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 93AA76A-I/SN meets industry standards.
7.What is the process for return or replacement of 93AA76A-I/SN?
All 93AA76A-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93AA76A-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 93AA76A-I/SN part is unused and in its original packaging.
Return procedure for 93AA76A-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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