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Microchip Technology 93LC76CT-I/MC
- Part No.:
- 93LC76CT-I/MC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
93LC76CT-I/MC.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:7,625
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Product details
Overview
93LC76CT-I/MC from Microchip Technology Inc. is an 8Kbit, low-voltage, serial EEPROM with Microwire-compatible 3-wire interface, supporting both 8-bit (x8) and 16-bit (x16) word organization via the ORG pin, 2.5–5.5V VCC range, Industrial temperature grade (–40°C to +85°C), and 1 million erase/write cycles - used for nonvolatile parameter storage in embedded microcontroller systems.
For engineers reviewing the 93LC76CT-I/MC datasheet, 93LC76CT-I/MC pinout, 93LC76CT-I/MC application, or 93LC76CT-I/MC equivalent, key selection considerations include its dual-word-size configurability, Program Enable (PE) write-protection, Ready/Busy status signaling on DO, self-timed erase/write, and compatibility with space-constrained designs using the 8-lead 2x3 DFN package (MC).
Technical Context
This device implements a synchronous serial Microwire interface with CS, CLK, DI, and DO signals, where instruction execution is triggered by a Start condition (CS high + DI high on CLK rising edge). Memory access uses opcode-driven commands including READ, WRITE, ERASE, ERAL, WRAL, EWEN, and EWDS - all clocked on CLK rising edges.
It features hardware-level data protection: power-on/off detection (VPOR = 1.5 V typical), automatic EWDS at power-up, and mandatory PE = high for programming. The ORG pin selects x8 (ORG = low) or x16 (ORG = high) organization, while PE must be tied to VCC or VSS - floating is prohibited.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1024 × 8 or 512 × 16, selectable via ORG pin) |
| VCC Range | 2.5 V to 5.5 V - supports single-supply operation across 3.3 V and 5 V systems |
| Endurance | 1,000,000 erase/write cycles - enables long-term field calibration and logging |
| Data Retention | Greater than 200 years at 25°C - ensures firmware or configuration persistence over product lifetime |
| Write Cycle Time | 5 ms typical (TWC) - defines minimum interval between successive write operations |
| Max Clock Frequency | 3 MHz at VCC ≥ 4.5 V - sets maximum serial throughput for configuration reads/writes |
| Temperature Range | –40°C to +85°C (Industrial grade) - validated for industrial control and automotive body electronics |
Pinout & Package
Package: 8-lead 2x3 mm DFN (exposed pad, MC suffix), Pb-free Matte Tin finish, RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; deselects device into standby mode |
| 2 CLK | Serial Clock | Synchronizes all data transfers; opcodes, addresses, and data clocked in/out on rising edge |
| 3 DI | Data Input | Accepts Start bit, opcodes, addresses, and write data; must not float during operation |
| 4 DO | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z when CS low or after operation completion |
| 5 VSS | Ground | Reference for all I/O and internal circuitry; exposed pad (if present) may be connected to VSS |
| 6 ORG | Organization Select | High = x16 mode (512 words), low = x8 mode (1024 words); must be hard-wired, not floated |
| 7 PE | Program Enable | High = write enabled; low = full array write-protection; mandatory tie to VCC/VSS - no floating allowed |
| 8 VCC | Power Supply | 2.5–5.5 V supply; internal POR circuit triggers at ~1.5 V to prevent spurious writes during brownout |
Key Features
| Feature | Design Value |
|---|---|
| Word-size configurability | Single device supports either 1024×8 or 512×16 layout via ORG pin - reduces BOM count for dual-architecture designs |
| Hardware write protection | Dedicated PE pin enables system-level lockout of memory writes - prevents corruption during firmware updates or power transitions |
| Self-timed erase/write | No external timing components required; internal logic manages auto-erase before write - simplifies host controller firmware |
| Ready/Busy status signaling | DO pin doubles as status indicator during programming - eliminates need for fixed delay loops or polling overhead |
| Power-on data protection | Internal voltage detect (VPOR ≈ 1.5 V) inhibits all operations below threshold - guarantees safe reset behavior across voltage ramps |
Applications
| Smart Meter Calibration Storage | Industrial PLC Configuration Backup |
|---|---|
Use Scenario: Storing meter-specific calibration coefficients, tariff tables, and tamper logs in utility smart meters operating across wide temperature ranges. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with guaranteed 200-year retention and 1M endurance - retains accuracy through decades of field deployment. Use Value: Eliminates battery-backed SRAM; supports secure, infrequent writes with hardware write-protection (PE) to prevent unauthorized recalibration. | Use Scenario: Preserving ladder logic configuration, I/O mapping, and alarm thresholds in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Serial EEPROM interfacing directly with PLC microcontroller via Microwire - minimal pin count, compatible with legacy 3-wire protocols. Use Value: Enables field-upgradable configurations without PCB redesign; ORG pin allows same part to support both 8-bit and 16-bit host data buses. |
| Automotive Body Control Module | Medical Device Usage Logging |
Use Scenario: Recording seat position memory, mirror presets, and lighting profiles in automotive BCMs requiring AEC-Q100-compliant components. IC Role / Device Role / Timing Role: Industrial-grade EEPROM (–40°C to +85°C) with robust ESD protection (≥4 kV) - withstands automotive electrical environments. Use Value: PE and ORG pins allow OEMs to lock configuration during production and adapt memory layout to MCU bus width - reducing variant SKUs. | Use Scenario: Capturing usage timestamps, sensor calibration history, and maintenance alerts in portable diagnostic equipment with strict regulatory data integrity requirements. IC Role / Device Role / Timing Role: Tamper-resistant nonvolatile storage with sequential read and WRAL/ERAL support - enables audit-trail generation and full-memory reinitialization. Use Value: 1M endurance and >200-year retention meet FDA 21 CFR Part 11 data longevity expectations; Ready/Busy signaling ensures deterministic write confirmation. |
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/SN | Same 8Kbit capacity, ORG/PE pins, and electrical specs; packaged in 8-lead SOIC (SN) instead of DFN (MC) | SOIC offers easier prototyping and hand-soldering; DFN provides 40% smaller footprint and better thermal performance | Select SN for lab validation or low-volume assembly; choose MC for space-constrained, high-reliability production boards |
| AT25DF041A-MAU-T | 4 Mbit SPI EEPROM (not Microwire); lacks ORG/PE pins; supports faster 20 MHz SPI clock vs. 3 MHz Microwire | Requires SPI interface and different command set; no hardware write-enable pin - relies on software locks | Use only if migrating to SPI architecture; not drop-in compatible due to protocol, pinout, and protection model differences |
Compared with 93LC76C-I/SN and AT25DF041A-MAU-T, the 93LC76CT-I/MC uniquely combines ORG-selectable word size, dedicated PE-based hardware write protection, and ultra-compact DFN packaging - making it optimal for cost-sensitive, space-limited industrial controllers requiring flexible memory interfacing.
Availability
93LC76CT-I/MC is available at Aetrix Electronics and suitable for smart meter calibration storage, industrial PLC configuration backup, and automotive body control module applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 93LC76CT-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 microcontrollers, analog devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93LCxx family was designed specifically for low-power, serial nonvolatile memory applications in resource-constrained embedded systems - emphasizing reliability, ease of integration, and broad voltage/temperature operation.
FAQ
What is the function of the ORG pin on the 93LC76CT-I/MC?
The ORG pin on the 93LC76CT-I/MC selects memory organization: logic high configures the device as 512 × 16-bit (x16), and logic low configures it as 1024 × 8-bit (x8). This pin must be hard-wired to VCC or VSS - floating is prohibited. The 93LC76CT-I/MC requires this pin to operate, unlike 'A' or 'B' variants which have fixed organization.
How does the PE pin protect memory on the 93LC76CT-I/MC?
The PE (Program Enable) pin on the 93LC76CT-I/MC must be driven high to allow any erase or write operation; tying it low disables all programming functions, providing hardware-level write protection. Unlike software locks, this protection remains active during power transitions and brownouts - a critical safeguard for the 93LC76CT-I/MC in safety-critical systems.
What package type does the 93LC76CT-I/MC use, and what are its key mechanical features?
The 93LC76CT-I/MC uses an 8-lead 2x3 mm DFN package (MC suffix) with an exposed thermal pad. It measures 2.0 mm × 3.0 mm × 0.75 mm, supports Pb-free Matte Tin finish, and is RoHS compliant. The exposed pad may be connected to VSS for improved thermal dissipation - a feature confirmed in Microchip's DS21796M packaging diagrams.
Does the 93LC76CT-I/MC support sequential read, and how is it implemented?
Yes, the 93LC76CT-I/MC supports sequential read: when CS remains high after a READ instruction, the internal address counter automatically increments, outputting consecutive memory locations on DO. This eliminates host-side address management overhead and is confirmed in Section 2.7 of the DS21796M datasheet for the 93LC76CT-I/MC.
What is the minimum VCC voltage required for reliable operation of the 93LC76CT-I/MC?
The 93LC76CT-I/MC requires a minimum VCC of 2.5 V for full specification compliance. Its internal power-on reset (POR) circuit activates at approximately 1.5 V (VPOR), disabling all operations below that threshold to prevent corruption - a behavior explicitly defined for '93LC' devices in Table 1-1 of the DS21796M datasheet.
93LC76CT-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:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x3)
93LC76CT-I/MC FAQ
1.How can I place an order for 93LC76CT-I/MC through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC76CT-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 93LC76CT-I/MC reliable?
The price and inventory of 93LC76CT-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 93LC76CT-I/MC is usually 5 days.
3.What payment methods are accepted for 93LC76CT-I/MC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC76CT-I/MC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC76CT-I/MC?
93LC76CT-I/MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC76CT-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 93LC76CT-I/MC?
For technical support, including 93LC76CT-I/MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC76CT-I/MC requirements.
6.How does Aetrix verify that 93LC76CT-I/MC is sourced from the original manufacturer or authorized distributors?
All 93LC76CT-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 93LC76CT-I/MC meets industry standards.
7.What is the process for return or replacement of 93LC76CT-I/MC?
All 93LC76CT-I/MC units undergo pre-shipment inspection (PSI). If there is an issue with 93LC76CT-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 93LC76CT-I/MC part is unused and in its original packaging.
Return procedure for 93LC76CT-I/MC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93LC76CT-I/MC Tags
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