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Microchip Technology 93AA76CT-I/MC
- Part No.:
- 93AA76CT-I/MC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
93AA76CT-I/MC.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,659
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Product details
Overview
93AA76CT-I/MC from Microchip Technology is an 8 Kbit, 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 years data retention - used in embedded system configuration storage and sensor calibration memory.
For engineers reviewing the 93AA76CT-I/MC datasheet, 93AA76CT-I/MC pinout, 93AA76CT-I/MC application, or 93AA76CT-I/MC equivalent, key selection considerations include VCC operating range (1.8–5.5V), ORG/PE pin dependency for word size and write lock, Ready/Busy status polling via DO, and compatibility with Microwire protocol timing constraints across voltage grades.
Technical Context
The 93AA76CT-I/MC implements a synchronous 3-wire Microwire interface (CS, CLK, DI/DO) with dedicated ORG and PE control pins enabling dynamic memory width selection (x8/x16) and hardware-level write inhibition. Its internal architecture includes auto-erase-before-write logic, ERAL/WRAL bulk operations, and power-on/off data protection circuitry triggered at ~1.5V VCC detect threshold.
Timing behavior is voltage-dependent: max clock frequency is 3 MHz at VCC ≥4.5V, 2 MHz at 2.5V ≤ VCC < 4.5V, and 1 MHz at 1.8V ≤ VCC < 2.5V; program cycle time is 5 ms for erase/write (AA/LC versions), and WRAL/ERAL require VCC ≥4.5V for guaranteed operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1024 × 8 or 512 × 16, selectable via ORG pin) |
| VCC Range | 1.8V to 5.5V - enables direct interface with 1.8V, 3.3V, and 5V microcontrollers without level shifting |
| Endurance | 1,000,000 erase/write cycles - supports frequent field firmware updates or logging in industrial controllers |
| Data Retention | >200 years at 25°C - ensures long-term calibration data integrity in unpowered equipment |
| Interface Protocol | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - minimal GPIO usage, no SPI mode bits required |
| Write Protection | Hardware-enabled via PE pin - prevents accidental writes even during brown-out or software fault conditions |
| Temp Range | Industrial: –40°C to +85°C - qualified for use in motor drives, PLC I/O modules, and outdoor instrumentation |
Pinout & Package
Package: 8-lead 2×3 DFN (MC), Pb-free Matte Tin finish, exposed pad (may be connected to VSS or left floating).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; device enters Standby mode when low, but completes ongoing write cycles |
| CLK | Serial Clock | Synchronizes all data transfers on rising edge; clock can be paused mid-sequence without corruption |
| DI | Data Input | Accepts Start bit, opcodes, addresses, and write data; must be stable before CS high |
| 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 signals; exposed pad connection improves thermal performance |
| ORG | Organization Select | High = x16 mode (512 words), Low = x8 mode (1024 bytes); must be hard-wired, not floated |
| PE | Program Enable | High = write enabled; Low = full array write-protection - mandatory for safe field operation |
| VCC | Power Supply | 1.8–5.5V supply; internal POR circuit triggers at ~1.5V to block writes during power ramp |
Key Features
| Feature | Design Value |
|---|---|
| Configurable Word Size | Single hardware pin (ORG) selects between 8-bit and 16-bit access - eliminates need for software rework across platform variants |
| Hardware Write Lock | Dedicated PE pin disables all erase/write functions regardless of command sequence - critical for fail-safe systems |
| Self-Timed Erase/Write | No external timing control needed; internal logic manages auto-erase-before-write and cycle completion - simplifies host firmware |
| Ready/Busy Polling | DO pin doubles as status indicator during programming - enables non-blocking host operation without fixed delays |
| Bulk Operations | ERAL (Erase All) and WRAL (Write All) commands execute full-array operations in one instruction - reduces host CPU overhead |
Applications
| Industrial Sensor Calibration | Motor Control Parameter Storage |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients and temperature compensation tables for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed infrequently at power-up or during maintenance; uses sequential read and x8 mode for byte-aligned coefficient access. Use Value: Eliminates external trimming components and enables field recalibration without hardware modification - supported by >200-year data retention and 1M-cycle endurance. | Use Scenario: Holding runtime-tuned PID gains, current limit thresholds, and commutation angle offsets in brushless DC motor drives. IC Role / Device Role / Timing Role: Configuration store updated during commissioning or adaptive tuning; leverages PE pin to prevent spurious writes during EMI events. Use Value: Hardware write lock (PE) ensures parameter integrity during electrical noise transients - critical for safety-critical motion control. |
| Medical Device Settings Backup | Smart Energy Meter Firmware Patch Storage |
Use Scenario: Preserving user-configured alarm thresholds, display brightness, and language settings across power cycles in portable diagnostic equipment. IC Role / Device Role / Timing Role: Low-power configuration EEPROM interfaced to 3.3V MCU; operates at 1.8V minimum to extend battery life during backup mode. Use Value: 1.8V operation allows direct connection to coin-cell-supplied real-time clocks - avoids voltage regulator cost and quiescent current penalty. | Use Scenario: Storing validated firmware patch images and version metadata for over-the-air updates in utility-grade electricity meters. IC Role / Device Role / Timing Role: Secure update staging area; uses WRAL command to atomically replace entire application image with verified checksum. Use Value: WRAL's self-timed bulk write (15 ms) and automatic ERAL integration reduce update window - minimizing exposure to power failure during flash replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC76CT-I/MC | Same pinout and interface, but 2.5–5.5V VCC range and automotive-temp option (E grade); lacks 1.8V support | Requires ≥2.5V supply; suitable where wider temp range (–40°C to +125°C) is needed | Select if system VCC never drops below 2.5V and extended temperature qualification is required |
| 93AA76CT-I/MS | Identical electrical specs and functionality, but in 8-lead MSOP package (3×3 mm) instead of 2×3 DFN | Same footprint compatibility not guaranteed; MSOP has larger body and different thermal pad layout | Select for legacy board designs using MSOP or where DFN assembly capability is unavailable |
Compared with 93LC76CT-I/MC, the 93AA76CT-I/MC enables lower-voltage operation down to 1.8V for battery-powered devices, while the 93AA76CT-I/MS offers identical functionality in a larger, more hand-solderable package - neither is pin-compatible with the DFN variant due to mechanical and thermal pad differences.
Availability
93AA76CT-I/MC is available at Aetrix Electronics and suitable for industrial sensor calibration, motor control parameter storage, and medical device settings backup requiring stable component supply, long-term obsolescence management, and RoHS-compliant packaging.
Supply support for 93AA76CT-I/MC 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, and Flash-IP solutions, specializing in reliable, low-power semiconductor products for embedded control applications.
The 93XX76 series was designed specifically for cost-sensitive, space-constrained systems needing robust nonvolatile memory with hardware write protection and wide supply voltage tolerance - targeting industrial, medical, and consumer electronics.
FAQ
What is the minimum VCC voltage required for reliable operation of the 93AA76CT-I/MC?
93AA76CT-I/MC requires a minimum VCC of 1.8V for full specification compliance, including read, write, and erase functions. Below 1.8V, internal power-on reset circuitry inhibits all programming operations to prevent data corruption; the device remains readable only if VCC stays above the DO output low-level threshold (~0.4V at 2.5V VCC).
How does the ORG pin affect memory addressing in the 93AA76CT-I/MC?
When ORG is tied high, 93AA76CT-I/MC operates in 16-bit mode (512 words), requiring 9 address bits (A8–A0); when ORG is low, it operates in 8-bit mode (1024 bytes), requiring 10 address bits (A9–A0). The instruction set and clock cycle count differ per mode - READ requires 22 cycles in x8 mode vs. 29 in x16 mode.
Is the PE pin mandatory for normal read operations of the 93AA76CT-I/MC?
No, the PE pin is not required for read operations. 93AA76CT-I/MC allows unrestricted reads regardless of PE state. PE only gates erase and write instructions: when PE is low, all EWEN, ERASE, WRITE, ERAL, and WRAL commands are ignored - reads and status polling remain fully functional.
What package type does the 'MC' suffix indicate for the 93AA76CT-I/MC?
The 'MC' suffix denotes the 8-lead 2×3 mm DFN (Dual Flat No-lead) package with exposed thermal pad. This package offers low profile (0.55 mm max height), excellent thermal performance, and fine-pitch (0.5 mm) leads - optimized for high-density PCB layouts in space-constrained industrial modules.
Can the 93AA76CT-I/MC be used in automotive applications?
No, 93AA76CT-I/MC is rated for Industrial temperature range (–40°C to +85°C) only. For automotive applications requiring –40°C to +125°C, Microchip specifies the 93LC76CT-E/MC or 93C76CT-E/MC variants - these share identical pinout and interface but differ in VCC range and qualification testing.
93AA76CT-I/MC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad
- 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 ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x3)
93AA76CT-I/MC FAQ
1.How can I place an order for 93AA76CT-I/MC through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA76CT-I/MC 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/MC reliable?
The price and inventory of 93AA76CT-I/MC 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/MC is usually 5 days.
3.What payment methods are accepted for 93AA76CT-I/MC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA76CT-I/MC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA76CT-I/MC?
93AA76CT-I/MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA76CT-I/MC 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/MC?
For technical support, including 93AA76CT-I/MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA76CT-I/MC requirements.
6.How does Aetrix verify that 93AA76CT-I/MC is sourced from the original manufacturer or authorized distributors?
All 93AA76CT-I/MC 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/MC meets industry standards.
7.What is the process for return or replacement of 93AA76CT-I/MC?
All 93AA76CT-I/MC units undergo pre-shipment inspection (PSI). If there is an issue with 93AA76CT-I/MC, 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/MC part is unused and in its original packaging.
Return procedure for 93AA76CT-I/MC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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