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Microchip Technology 93C76CT-E/MS
- Part No.:
- 93C76CT-E/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
93C76CT-E/MS.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,265
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Product details
Overview
93C76CT-E/MS from Microchip Technology Inc. is an 8Kbit, 4.5–5.5V serial EEPROM with Microwire-compatible 3-wire interface, 8-bit organization (no ORG pin), and industrial/automotive temperature range (–40°C to +125°C). It features self-timed erase/write cycles, 1 million endurance cycles, >200-year data retention, and write-protection via internal EWEN/EWDS commands. Used in automotive body control modules for calibration storage.
For engineers reviewing the 93C76CT-E/MS datasheet, 93C76CT-E/MS pinout, 93C76CT-E/MS application, or 93C76CT-E/MS equivalent, key selection considerations include VCC operating range (4.5–5.5V), automotive-grade temperature support (–40°C to +125°C), absence of ORG/PE pins, MSOP-8 packaging, and Microwire protocol timing compliance at up to 3 MHz.
Technical Context
This device implements a synchronous serial Microwire interface with CS, CLK, DI, and DO signals. It uses a dedicated 1024 × 8-bit memory array with no external word-size configuration - unlike 'C' variants, it lacks ORG and PE pins, fixing both organization and write-enable behavior. All instructions (READ, WRITE, ERASE, ERAL, EWEN, EWDS) are clocked on rising CLK edges with strict setup/hold timing requirements.
Power-on data protection is enforced by a VCC detect threshold of 3.8 V; below this voltage, all operations are inhibited. The device powers up in EWDS mode, requiring explicit EWEN before any erase or write, and supports sequential read and Ready/Busy polling via DO during programming cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (1024 × 8-bit), fixed x8 organization - no ORG pin required or present |
| VCC operating range | 4.5 V to 5.5 V - incompatible with 3.3 V or 2.5 V systems; requires stable 5 V rail |
| Temperature grade | Automotive (E): –40°C to +125°C - qualified for under-hood and powertrain applications |
| Write endurance | 1,000,000 erase/write cycles - validated at 25°C, 5.0 V; supports long-life firmware parameter logging |
| Data retention | >200 years at +85°C - ensures calibration data integrity over full vehicle service life |
| Max clock frequency | 3 MHz at VCC ≥ 4.5 V - enables fast reprogramming during ECU boot or diagnostics |
| Write cycle time | 2 ms per byte (TWC) - deterministic timing for real-time system scheduling |
Pinout & Package
8-lead MSOP (Micro Small Outline Package), 3.0 mm × 3.0 mm body, 0.65 mm pitch, exposed pad optional (not electrically connected). Pin 1 marked by laser dot; pin 1 ID corner indicated on top marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions to reset internal logic |
| CLK | Serial Clock | Rising-edge synchronized I/O; stoppable mid-transfer; no clocks needed during self-timed write |
| DI | Data Input | Accepts Start bit, opcode, address, and data; high-impedance when CS = low |
| DO | Data Output / Status | Tri-state output; delivers read data or Ready/Busy (low = busy) during programming |
| VSS | Ground | Reference for all I/O and internal circuitry; connect to system ground plane |
| VCC | Power Supply | 4.5–5.5 V only; internal POR triggers at 3.8 V - no operation below threshold |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control; 2 ms TWC guarantees predictable latency for safety-critical writes |
| Power-on/off data protection | VCC detect at 3.8 V prevents partial writes during brown-out or hot-plug events |
| Industry-standard 3-wire serial interface | Direct drop-in compatibility with legacy Microwire controllers (e.g., PIC® MCU MSSP modules) |
| Ready/Busy status on DO | Enables non-blocking polling during programming - avoids fixed delays and improves system responsiveness |
| 1M endurance / 200-yr retention | Validated for automotive duty cycles; supports 100+ calibrations per hour over 15-year vehicle lifetime |
Applications
| Engine Control Unit (ECU) Calibration Storage | Body Control Module (BCM) Configuration |
|---|---|
Use Scenario: Storing fuel trim maps, ignition timing offsets, and OBD-II diagnostic flags that require field updates and long-term reliability. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed via SPI-like Microwire during boot or CAN-based reprogramming sessions. Use Value: 4.5–5.5 V operation matches automotive battery rail; 125°C rating ensures functionality near engine bay heat sources. | Use Scenario: Holding door lock logic states, mirror position presets, and lighting profiles across vehicle power cycles. IC Role / Device Role / Timing Role: Serial EEPROM interfaced to 8-bit microcontroller GPIO or hardware UART-to-Microwire bridge. Use Value: 2 ms write time enables fast user-setting saves; >200-year retention prevents loss of personalization over vehicle ownership. |
| Advanced Driver Assistance System (ADAS) Sensor Offset Storage | Electric Power Steering (EPS) Motor Calibration |
Use Scenario: Retaining camera/lidar alignment offsets after factory calibration or collision repair. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory for safety-critical sensor metadata accessed during startup self-test. Use Value: Automotive temperature grade and 1M endurance support repeated recalibration without wear-out risk. | Use Scenario: Storing torque sensor zero-point compensation values and motor phase advance tables. IC Role / Device Role / Timing Role: High-reliability nonvolatile storage tied to EPS ECU's main 5 V supply and watchdog-managed write sequence. Use Value: VCC detect at 3.8 V prevents corruption during transient undervoltage events common in 12 V automotive systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93C76AT-E/MS | Same 8Kbit x8 organization, but Industrial temp (–40°C to +85°C); identical pinout and timing | Not qualified for under-hood or powertrain use; limited to cabin electronics | Select only if ambient operating temperature stays ≤85°C and automotive qualification is unnecessary |
| 93LC76BT-E/MS | 16-bit organization (512 × 16), same VCC (2.5–5.5 V), includes ORG pin - not pin-compatible | Requires software rework for address/data width; incompatible with existing x8 firmware | Choose only when migrating to wider data paths and redesigning driver code and layout |
Compared with 93C76AT-E/MS, the 93C76CT-E/MS adds automotive temperature qualification without changing footprint or interface; compared with 93LC76BT-E/MS, it avoids ORG pin complexity and maintains direct firmware compatibility for x8 systems.
Availability
93C76CT-E/MS is available at Aetrix Electronics and suitable for automotive control units, ADAS subsystems, and electric power steering modules requiring stable component supply with AEC-Q100-aligned reliability and long-term lifecycle support.
Supply support for 93C76CT-E/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 memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93Cxx series was designed specifically for cost-sensitive, high-reliability automotive and industrial serial EEPROM applications, emphasizing robustness over wide temperature ranges, low-power operation, and Microwire protocol compatibility with legacy microcontrollers.
FAQ
What is the operating voltage range for the 93C76CT-E/MS?
The 93C76CT-E/MS operates strictly within 4.5 V to 5.5 V. Its internal power-on reset triggers at 3.8 V, and no functional operation is guaranteed below that threshold. This makes it unsuitable for 3.3 V systems without level-shifting, and incompatible with lower-voltage variants like the 93LC76A (2.5–5.5 V).
Does the 93C76CT-E/MS have an ORG or PE pin?
No, the 93C76CT-E/MS does not include ORG or PE pins. As a 'C76A' variant, it is fixed at 8-bit organization and lacks hardware write-protection - write enable is managed exclusively via EWEN/EWDS commands. These pins are present only on 'C76C' versions.
What package type is used for the 93C76CT-E/MS?
The 93C76CT-E/MS is supplied in an 8-lead MSOP (Micro Small Outline Package) with 3.0 mm × 3.0 mm body size and 0.65 mm lead pitch. The package marking includes "C76C" and temperature grade "E", and conforms to Pb-free (Matte Tin) RoHS requirements.
How many erase/write cycles does the 93C76CT-E/MS support?
The 93C76CT-E/MS supports 1,000,000 erase/write cycles at 25°C and 5.0 V, as specified in DS21796M. Endurance remains valid across its full automotive temperature range (–40°C to +125°C), making it suitable for frequent calibration updates in vehicle ECUs.
Is the 93C76CT-E/MS compatible with standard SPI interfaces?
The 93C76CT-E/MS uses a Microwire-compatible 3-wire interface (CS, CLK, DI/DO), not standard SPI. It lacks separate MISO/MOSI lines and requires specific instruction opcodes (e.g., 10b for READ). While some SPI peripherals can emulate Microwire timing, native SPI mode is not supported - firmware must follow Microchip's instruction set and timing diagrams.
93C76CT-E/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:
- 2ms
- Access Time:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
93C76CT-E/MS FAQ
1.How can I place an order for 93C76CT-E/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C76CT-E/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 93C76CT-E/MS reliable?
The price and inventory of 93C76CT-E/MS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93C76CT-E/MS is usually 5 days.
3.What payment methods are accepted for 93C76CT-E/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C76CT-E/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C76CT-E/MS?
93C76CT-E/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C76CT-E/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 93C76CT-E/MS?
For technical support, including 93C76CT-E/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C76CT-E/MS requirements.
6.How does Aetrix verify that 93C76CT-E/MS is sourced from the original manufacturer or authorized distributors?
All 93C76CT-E/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 93C76CT-E/MS meets industry standards.
7.What is the process for return or replacement of 93C76CT-E/MS?
All 93C76CT-E/MS units undergo pre-shipment inspection (PSI). If there is an issue with 93C76CT-E/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 93C76CT-E/MS part is unused and in its original packaging.
Return procedure for 93C76CT-E/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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