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Microchip Technology 93LC76CT-I/MS
- Part No.:
- 93LC76CT-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
93LC76CT-I/MS.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,498
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Product details
Overview
93LC76CT-I/MS from Microchip Technology Inc. is an 8Kbit, low-voltage, serial EEPROM with Microwire-compatible 3-wire interface, 512 × 16-bit organization (ORG = 1), and industrial temperature range (–40°C to +85°C). It features self-timed erase/write cycles, program enable (PE) pin for full-array write protection, and Ready/Busy status via DO pin - used in embedded system configuration storage, sensor calibration data retention, and firmware parameter backup.
For engineers reviewing the 93LC76CT-I/MS datasheet, 93LC76CT-I/MS pinout, 93LC76CT-I/MS application, or 93LC76CT-I/MS equivalent, key selection criteria include VCC operating range (2.5–5.5 V), 16-bit word access mode, PE/ORG pin control logic, 5 ms typical erase/write cycle time, and MSOP-8 package compatibility with space-constrained PCB layouts.
Technical Context
The 93LC76CT-I/MS implements a synchronous serial Microwire interface with CS, CLK, DI, and DO signals, requiring a Start bit detection before instruction execution. Its memory array supports both x8 and x16 organization selected by the ORG pin - fixed at x16 for this variant per device marking and datasheet specification.
Write operations require prior EWEN command and active-high PE signal; erase/write cycles are fully self-timed with automatic ERAL before WRAL. Status polling via DO pin during programming provides real-time Ready/Busy feedback without external timing dependencies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (512 × 16-bit organization) |
| VCC Operating Range | 2.5 V to 5.5 V - supports single-supply operation across 3.3 V and 5 V systems |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - no SPI mode or quad I/O |
| Erase/Write Cycle Time | 5 ms typical - enables deterministic firmware update latency in host-controlled sequences |
| Data Retention | 200 years at 25°C - ensures long-term reliability for infrequently updated configuration data |
| Endurance | 1,000,000 erase/write cycles - suitable for dynamic parameter logging with wear leveling |
| Temperature Range | –40°C to +85°C (Industrial grade) - qualified for extended ambient operation in industrial controls |
Pinout & Package
8-lead MSOP (150 mil) package with exposed pad (optional VSS connection), RoHS-compliant matte tin finish. Pin 1 marked by laser dot; pin 1 ID corner defined per JEDEC MO-187.
| 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 | Positive-edge synchronized I/O clock; stoppable mid-sequence without corruption |
| DI | Data Input | Accepts Start bit, opcode, address, and data; requires stable setup/hold relative to CLK |
| DO | Data Output / Status | Tri-state output for read data or Ready/Busy flag (low = busy); enters High-Z on CS fall |
| VSS | Ground | Reference return path for all digital and analog functions; connects to exposed pad if used |
| ORG | Organization Select | Fixed high (VCC) for x16 mode - determines 16-bit address/data width and instruction set mapping |
| PE | Program Enable | Must be high to allow EWEN, ERASE, WRITE, WRAL - prevents accidental writes when grounded |
| VCC | Power Supply | 2.5–5.5 V supply with internal POR circuitry activating at ~1.5 V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Word-selectable x16 organization | Enables compact 16-bit microcontroller interfacing without external data-width conversion logic |
| Program Enable (PE) pin | Hardware-level write lock independent of software commands - eliminates firmware vulnerability to spurious writes |
| Self-timed erase/write with auto-ERAL | Removes need for host-controlled timing delays; WRAL includes implicit ERAL for atomic full-array updates |
| Ready/Busy status on DO | Allows polling-based synchronization without dedicated interrupt lines or fixed timeout waits |
| Low-power standby current | 1 µA max at 25°C - extends battery life in always-on sensor nodes and portable devices |
Applications
| Industrial Sensor Calibration Storage | Embedded System Configuration Backup |
|---|---|
Use Scenario: Storing factory-trimmed ADC offset/gain coefficients and temperature compensation tables in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during power-up initialization and runtime recalibration. Use Value: Eliminates need for external trimming components and enables field-updatable calibration without hardware changes. | Use Scenario: Retaining user-defined network settings (IP, subnet, gateway), display brightness, and language preferences in HMI panels. IC Role / Device Role / Timing Role: Serial configuration store interfaced directly to MCU GPIOs using minimal 4-pin Microwire protocol. Use Value: Survives 1M+ power cycles and retains data >200 years - ensures consistent UI behavior across product lifetime. |
| Firmware Parameter Logging | Automotive Body Control Module Settings |
Use Scenario: Recording fault counters, runtime hours, and diagnostic flags in HVAC controllers with limited write endurance budget. IC Role / Device Role / Timing Role: Wear-leveling-aware parameter archive with deterministic 5 ms write latency per 16-bit word. Use Value: Enables predictive maintenance analytics while meeting ASIL-B functional safety data integrity requirements. | Use Scenario: Storing seat position memory, mirror angle presets, and lighting profiles in automotive door modules. IC Role / Device Role / Timing Role: Industrial-grade EEPROM qualified for –40°C to +85°C operation and ESD-robust (≥4 kV HBM). Use Value: Meets AEC-Q100 stress test requirements for passenger compartment electronics without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC76B-I/MS | No ORG or PE pins; fixed x16 organization; same VCC range and timing | Lacks hardware write protection and configurable organization - requires firmware-only lockout | Select when board layout lacks routing for ORG/PE or design uses only x16 mode with software-managed protection |
| AT25080B-MAHL-T | SPI interface (4-wire), 8 Kbit x8 organization, 2.5–5.5 V, SOIC-8 package | Different protocol stack; no Ready/Busy pin - relies on WIP flag polling over SPI | Select when migrating from legacy SPI-based designs or when needing higher clock frequency (20 MHz vs 3 MHz max) |
Compared with 93LC76B-I/MS, the 93LC76CT-I/MS adds hardware write protection and flexible x8/x16 selection; compared with AT25080B-MAHL-T, it offers lower pin count and integrated status signaling but slower interface speed and narrower feature set.
Availability
93LC76CT-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration storage, embedded system configuration backup, and firmware parameter logging requiring stable component supply across multi-year production cycles.
Supply support for 93LC76CT-I/MS 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 nonvolatile memory solutions, headquartered in Chandler, Arizona.
The 93LCxx series was designed specifically for cost-sensitive, low-power serial EEPROM applications in industrial, automotive, and consumer systems where Microwire compatibility and hardware write protection are critical.
FAQ
What is the function of the ORG pin on the 93LC76CT-I/MS?
The ORG pin on the 93LC76CT-I/MS selects memory organization: tied to VCC for 512 × 16-bit mode (x16), or to VSS for 1024 × 8-bit mode (x8). For the 93LC76CT-I/MS, the 'T' suffix and device marking confirm it is configured for x16 operation, requiring ORG = VCC. This pin is not present on A/B variants and is mandatory for C-series functionality.
Does the 93LC76CT-I/MS require an external pull-up resistor on the DO line?
No, the 93LC76CT-I/MS does not require an external pull-up on DO. The DO pin is actively driven high or low during read/status cycles and enters High-Z when inactive. However, if DI and DO are shorted (shared bus), a current-limiting resistor is recommended to prevent bus conflict during the dummy zero phase of read operations.
How is write protection implemented on the 93LC76CT-I/MS?
Write protection on the 93LC76CT-I/MS is implemented via two independent mechanisms: (1) the Program Enable (PE) pin must be held high to permit any erase/write operation, and (2) the Erase/Write Disable (EWDS) command disables all programming until EWEN is issued. Both hardware (PE) and software (EWDS/EWEN) layers ensure robust protection against accidental writes.
What is the maximum clock frequency supported by the 93LC76CT-I/MS at 3.3 V?
At VCC = 3.3 V, the 93LC76CT-I/MS supports a maximum clock frequency of 2 MHz, as specified in Table 1-2 (A1) for the 2.5 V ≤ VCC < 4.5 V range. Exceeding this frequency risks setup/hold violations and unreliable instruction execution, especially under worst-case temperature and voltage conditions.
Can the 93LC76CT-I/MS be used in automotive applications requiring AEC-Q100 qualification?
The 93LC76CT-I/MS is rated for Industrial temperature range (–40°C to +85°C) and is not AEC-Q100 qualified. For automotive applications, Microchip specifies the 'E' grade variants (e.g., 93LC76CT-E/MS) which undergo additional stress testing and are qualified to AEC-Q100 Grade 2 (–40°C to +105°C) or Grade 1 (–40°C to +125°C). The 'I' suffix indicates industrial, not automotive, qualification.
93LC76CT-I/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
93LC76CT-I/MS FAQ
1.How can I place an order for 93LC76CT-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC76CT-I/MS 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/MS reliable?
The price and inventory of 93LC76CT-I/MS 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/MS is usually 5 days.
3.What payment methods are accepted for 93LC76CT-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC76CT-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC76CT-I/MS?
93LC76CT-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC76CT-I/MS 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/MS?
For technical support, including 93LC76CT-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC76CT-I/MS requirements.
6.How does Aetrix verify that 93LC76CT-I/MS is sourced from the original manufacturer or authorized distributors?
All 93LC76CT-I/MS 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/MS meets industry standards.
7.What is the process for return or replacement of 93LC76CT-I/MS?
All 93LC76CT-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 93LC76CT-I/MS, 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/MS part is unused and in its original packaging.
Return procedure for 93LC76CT-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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