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Microchip Technology 93C76CT-E/MNY
- Part No.:
- 93C76CT-E/MNY
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
93C76CT-E/MNY.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,168
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Product details
Overview
93C76CT-E/MNY from Microchip Technology Inc. is an 8K-bit, 4.5–5.5V serial Microwire-compatible EEPROM with 512 × 16-bit organization, Program Enable (PE) and ORG pins for configuration flexibility, and industrial/automotive temperature support (–40°C to +125°C). It delivers 1 million erase/write cycles and >200 years data retention in an 8-lead TDFN package, used for firmware storage and calibration data in automotive control modules.
For engineers reviewing the 93C76CT-E/MNY datasheet, 93C76CT-E/MNY pinout, 93C76CT-E/MNY application, or 93C76CT-E/MNY equivalent, key selection criteria include VCC range (4.5–5.5V), PE/ORG pin dependency for write enable and word-size selection, WRAL/ERAL self-timed operation, Ready/Busy status via DO pin, and automotive-grade reliability under extended temperature stress.
Technical Context
This device implements a synchronous 3-wire Microwire interface (CS/CLK/DI/DO) with dedicated PE and ORG inputs - unlike A/B variants - enabling hardware-controlled write protection and x8/x16 memory mapping. Its internal logic requires EWEN before any erase/write, enforces VCC ≥4.5V for ERAL/WRAL, and uses DO pin polling for real-time Ready/Busy feedback during self-timed programming cycles.
The 93C76CT-E/MNY supports sequential read, auto-erase-before-write, and power-on/off data protection. Its timing is voltage-dependent: max clock frequency is 3 MHz at VCC ≥4.5V, dropping to 2 MHz below 4.5V, with TWC = 2 ms for erase/write and TWL = 15 ms for Write All operations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (512 × 16-bit organization) |
| VCC operating range | 4.5 V to 5.5 V - mandates stable high-voltage rail; not compatible with 3.3V-only systems |
| Endurance | 1,000,000 erase/write cycles - suitable for frequent field calibration updates |
| Data retention | >200 years at 25°C - ensures long-term integrity of stored configuration data |
| Temperature grade | Automotive (E): –40°C to +125°C - qualified for engine control unit (ECU) and transmission control environments |
| Write cycle time | 2 ms (TWC) - enables fast parameter updates without blocking host MCU execution |
| Max clock frequency | 3 MHz at VCC ≥4.5V - allows efficient data transfer while maintaining timing margin |
Pinout & Package
8-lead TDFN (2×3 mm, exposed pad), Pb-free Matte Tin finish. Pin 1 marked by laser; exposed pad recommended to be connected to VSS for thermal and EMI performance.
| 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 | Synchronizes all data transfers on rising edge; stoppable mid-sequence without corruption |
| DI | Data Input | Accepts Start bit, opcodes, addresses, and write data; requires pull-down when unused |
| DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge |
| VSS | Ground | Reference for all I/O and internal logic; connects to exposed pad for thermal dissipation |
| ORG | Organization select | High = x16 mode, low = x8 mode; must be hardwired - no floating allowed |
| PE | Program Enable | High = write enabled; low = full array write-protection - critical for safety-critical firmware |
| VCC | Power supply | 4.5–5.5 V only; internal POR triggers at ~3.8 V - prevents partial writes during brownout |
Key Features
| Feature | Design Value |
|---|---|
| Hardware write protection via PE pin | Prevents accidental overwrites in automotive environments where ECU resets may occur during programming |
| Configurable x8/x16 organization via ORG pin | Enables single BOM reuse across 8-bit and 16-bit microcontroller platforms without firmware changes |
| Self-timed ERAL and WRAL commands | Eliminates need for external timing control - simplifies host software and reduces CPU overhead |
| Ready/Busy status on DO pin | Allows non-blocking polling instead of fixed delays, improving system responsiveness during EEPROM updates |
| Power-on/off data protection circuitry | Guarantees data integrity during power ramp-up/down sequences common in vehicle battery transients |
Applications
| Engine Control Unit (ECU) | Transmission Control Module (TCM) |
|---|---|
Use Scenario: Storing adaptive fuel trim tables and knock sensor learning values that update dynamically during vehicle operation. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with guaranteed write integrity during ignition cycling and load dump events. Use Value: Enables closed-loop engine optimization across vehicle lifetime without requiring external backup power or supercapacitors. | Use Scenario: Retaining gear shift pattern history and clutch wear compensation coefficients across power cycles. IC Role / Device Role / Timing Role: Automotive-grade EEPROM interfacing directly with 16-bit transmission MCU via Microwire bus. Use Value: Supports ASIL-B relevant data persistence with hardware write lock (PE) and voltage-monitored programming. |
| Body Control Module (BCM) | Advanced Driver Assistance System (ADAS) Camera Calibration |
Use Scenario: Holding door lock configuration, window position memory, and lighting profiles updated via CAN diagnostics. IC Role / Device Role / Timing Role: Low-pin-count serial EEPROM with integrated VCC brownout detection preventing partial writes during battery voltage sag. Use Value: Eliminates need for external supervisor IC, reducing BOM count and PCB area in space-constrained BCM designs. | Use Scenario: Storing per-camera lens distortion coefficients and sensor alignment offsets generated during factory calibration. IC Role / Device Role / Timing Role: High-reliability storage for safety-critical calibration data requiring >200-year retention and 1M-cycle endurance. Use Value: Meets ISO 26262 functional safety requirements for data integrity without redundant storage or checksum overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93C76CT-I/MNY | Industrial temp range (–40°C to +85°C); identical electrical specs and pinout | Not qualified for under-hood automotive use; unsuitable for ECU/TCM mounting locations | Select only for cabin electronics or non-temperature-stressed industrial controls |
| AT25DF041A-SH-T | 4 Mbit SPI NOR Flash; no PE/ORG pins; sector erase only; no built-in auto-erase | Lacks hardware write protection and x8/x16 configurability; requires external erase management | Use only if migrating to SPI interface and accepting higher software complexity for erase control |
Compared with 93C76CT-I/MNY, the 93C76CT-E/MNY adds automotive qualification and VCC ≥4.5V enforcement for ERAL/WRAL - essential for safety-critical updates. Versus AT25DF041A-SH-T, it offers simpler command set, deterministic 2 ms writes, and hardware-enforced write lock, reducing firmware validation scope.
Availability
93C76CT-E/MNY is available at Aetrix Electronics and suitable for automotive control units, transmission modules, and body electronics requiring stable component supply with automotive-grade reliability and long-term lifecycle support.
Supply support for 93C76CT-E/MNY 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 EEPROM family was designed specifically for cost-sensitive, low-power, nonvolatile storage in automotive and industrial systems requiring robust serial interface, hardware write protection, and extended temperature operation.
FAQ
What is the function of the PE pin on the 93C76CT-E/MNY?
The PE (Program Enable) pin on the 93C76CT-E/MNY must be driven high to allow erase/write operations; tying it low disables all programming functions permanently. This hardware-level write lock is mandatory for safety-critical automotive applications and is not present on A/B variants. The 93C76CT-E/MNY will not execute EWEN, ERASE, or WRITE unless PE is asserted high before the final data bit clock edge.
Can the 93C76CT-E/MNY operate at 3.3V?
No, the 93C76CT-E/MNY requires a minimum VCC of 4.5V and is rated only up to 5.5V. Its internal voltage detector triggers at ~3.8V, and ERAL/WRAL operations require VCC ≥4.5V to complete reliably. Using 3.3V will prevent initialization, disable programming, and cause undefined behavior - this part is incompatible with 3.3V-only systems.
How does the ORG pin affect memory access in the 93C76CT-E/MNY?
The ORG pin on the 93C76CT-E/MNY selects between 512 × 16-bit (ORG = high) and 1024 × 8-bit (ORG = low) organization. This determines instruction length: x16 mode uses 9-bit addresses and 16-bit data words (29 CLK cycles for READ), while x8 mode uses 10-bit addresses and 8-bit data (22 CLK cycles). ORG must be hardwired - floating causes undefined operation.
What is the purpose of the Ready/Busy status on the DO pin of the 93C76CT-E/MNY?
The DO pin of the 93C76CT-E/MNY serves dual function: outputting read data and indicating Ready/Busy status during erase/write. When CS is brought high after ≥250 ns low, DO goes low during active programming and returns high upon completion. This enables precise, non-blocking host polling - eliminating fixed delay loops and improving system efficiency during 2 ms TWC or 15 ms TWL operations.
Is the 93C76CT-E/MNY pin-compatible with other 93C76 variants?
Yes, the 93C76CT-E/MNY shares identical 8-lead TDFN pinout and signal mapping with all 93C76x variants (e.g., 93C76A, 93C76B, 93C76C), including CS/CLK/DI/DO/VSS/ORG/PE/VCC. However, A/B versions lack ORG and PE pins (internally fixed), so direct substitution requires board-level wiring changes to accommodate those signals - only C-versions support full hardware configurability.
93C76CT-E/MNY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- 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-TDFN (2x3)
93C76CT-E/MNY FAQ
1.How can I place an order for 93C76CT-E/MNY through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C76CT-E/MNY 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/MNY reliable?
The price and inventory of 93C76CT-E/MNY 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/MNY is usually 5 days.
3.What payment methods are accepted for 93C76CT-E/MNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C76CT-E/MNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C76CT-E/MNY?
93C76CT-E/MNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C76CT-E/MNY 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/MNY?
For technical support, including 93C76CT-E/MNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C76CT-E/MNY requirements.
6.How does Aetrix verify that 93C76CT-E/MNY is sourced from the original manufacturer or authorized distributors?
All 93C76CT-E/MNY 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/MNY meets industry standards.
7.What is the process for return or replacement of 93C76CT-E/MNY?
All 93C76CT-E/MNY units undergo pre-shipment inspection (PSI). If there is an issue with 93C76CT-E/MNY, 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/MNY part is unused and in its original packaging.
Return procedure for 93C76CT-E/MNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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