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Microchip Technology 93LC76CT-E/MS
- Part No.:
- 93LC76CT-E/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
93LC76CT-E/MS.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,295
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Product details
Overview
93LC76CT-E/MS from Microchip Technology is an 8 Kbit, low-voltage, serial EEPROM with Microwire-compatible 3-wire interface, 2.5–5.5 V supply range, and dual 8-/16-bit word organization selectable via ORG pin. It features program enable (PE) for full-array write protection, self-timed erase/write cycles (5 ms typical), and industrial/automotive temperature support (–40°C to +125°C). Used in embedded system configuration storage, sensor calibration data retention, and power-fail-safe parameter backup.
For engineers reviewing the 93LC76CT-E/MS datasheet, 93LC76CT-E/MS pinout, 93LC76CT-E/MS application, or 93LC76CT-E/MS equivalent, key selection considerations include voltage compatibility (2.5–5.5 V), MSOP-8 package footprint, ORG/PE pin dependency for memory configuration and write control, and automotive-grade endurance (1M cycles, >200-year data retention).
Technical Context
The 93LC76CT-E/MS implements a synchronous Microwire-compatible serial interface with CS, CLK, DI, and DO lines, plus dedicated ORG and PE pins for runtime memory width selection and hardware write-enable gating. Its internal architecture includes address decoder, mode decode logic, and output buffer with Ready/Busy status reporting on DO during erase/write operations.
It supports both x8 (ORG = low) and x16 (ORG = high) configurations, requires EWEN command before any programming, and enforces VCC ≥4.5 V for ERAL and WRAL operations. Power-on/off data protection circuitry ensures integrity during brown-out conditions, and automatic ERAL precedes WRAL execution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (1024 × 8 or 512 × 16, configurable) |
| Supply voltage | 2.5–5.5 V - supports wide-range industrial and automotive rails without level-shifting |
| Endurance | 1,000,000 erase/write cycles - enables frequent field updates in telemetry or calibration systems |
| Data retention | >200 years at 25°C - guarantees long-term nonvolatile storage without refresh |
| Write cycle time | 5 ms typical - defines minimum interval between successive writes to same address |
| Operating temp | –40°C to +125°C - qualified for under-hood automotive and industrial edge nodes |
| Interface | Microwire 3-wire serial (CS/CLK/DI/DO) - minimal GPIO usage, compatible with legacy MCU peripherals |
Pinout & Package
8-lead MSOP (3.0 × 3.0 mm, 0.65 mm pitch) with exposed pad (optional VSS connection). 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; device enters Standby when low; must be held low ≥250 ns between commands |
| CLK | Serial Clock | Synchronizes all data transfers on rising edge; clock may pause mid-sequence without error |
| DI | Data Input | Accepts Start bit, opcode, address, and write data; tied to DO only with current-limiting resistor |
| 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; exposed pad may be connected to VSS for thermal relief |
| ORG | Organization Select | High = x16 mode (512 words), low = x8 mode (1024 words); must be hardwired, not floated |
| PE | Program Enable | High = write enabled; low = full-array write protection; mandatory high before last data bit of WRITE/WRAL |
| VCC | Power Supply | 2.5–5.5 V input; internal POR triggers at ~1.5 V; VCC ≥4.5 V required for ERAL/WRAL |
Key Features
| Feature | Design Value |
|---|---|
| Hardware write protection | PE pin disables all erase/write functions at silicon level - prevents firmware bugs or noise-induced corruption |
| Configurable word size | ORG pin selects x8 or x16 organization without changing firmware - simplifies reuse across 8-bit and 16-bit host systems |
| Self-timed auto-erase/write | No external timing control needed - eliminates MCU wait-state overhead and reduces software complexity |
| Ready/Busy polling | DO pin reports status during programming - enables efficient non-blocking operation without fixed delays |
| Power-on/off data protection | Internal circuitry inhibits writes below VCC threshold (~1.5 V) - prevents partial writes during power ramp-up/down |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Configuration Storage |
|---|---|
Use Scenario: Storing adaptive fuel trim values, fault codes, and calibration offsets that persist across ignition cycles and battery disconnects. IC Role / Device Role / Timing Role: Nonvolatile configuration register providing guaranteed data retention over 200 years and 1M+ update cycles at –40°C to +125°C. Use Value: Eliminates need for external backup capacitors or supercapacitors while meeting AEC-Q100 Grade 1 requirements via automotive temp grade and robust write-protection (PE pin). | Use Scenario: Holding user-defined I/O mapping, PID loop parameters, and alarm thresholds in modular automation controllers. IC Role / Device Role / Timing Role: Serial configuration EEPROM interfaced directly to ARM Cortex-M MCU via GPIO-banged Microwire, using ORG to match host bus width. Use Value: Reduces BOM count by replacing parallel EEPROM; MSOP-8 footprint saves PCB area vs SOIC-8; low 1 µA standby current extends battery life in remote units. |
| Medical Infusion Pump Calibration | Smart Meter Firmware Patch Storage |
Use Scenario: Retaining flow-rate calibration coefficients and safety-critical dose limits updated during factory service or field recalibration. IC Role / Device Role / Timing Role: Tamper-resistant parameter store with hardware write lock (PE = low) enforced during normal operation. Use Value: PE pin provides physical write-disable independent of software state - satisfies IEC 62304 Class C safety requirement for immutable calibration data. | Use Scenario: Storing encrypted firmware patches and cryptographic keys for secure OTA updates in utility meters deployed for 15+ years. IC Role / Device Role / Timing Role: Long-life data vault supporting 1M endurance cycles and >200-year retention at elevated ambient temperatures. Use Value: Enables field-upgradable security without replacement - meets ANSI C12.22 and DLMS/COSEM lifecycle expectations for metering infrastructure. |
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/MS | Same die, industrial temp only (–40°C to +85°C); no automotive qualification | Not suitable for under-hood or high-temp industrial enclosures requiring +125°C operation | Select when cost sensitivity outweighs extended temperature need and automotive compliance is unnecessary |
| AT25DF041A-MAU-T | SPI interface (4-wire), 4 Mbit density, no ORG/PE pins, sector protection instead of full-array lock | Lacks hardware-configurable word size and dedicated write-enable pin; requires SPI peripheral, not Microwire | Choose for higher density or SPI-native designs; avoid when ORG-based flexibility or PE-level security is required |
Compared with 93LC76C-I/MS, the 93LC76CT-E/MS adds automotive qualification and extended temperature margin; compared with AT25DF041A-MAU-T, it offers simpler 3-wire control, hardware write-gating, and runtime word-size selection - critical for resource-constrained or safety-critical embedded systems.
Availability
93LC76CT-E/MS is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC configuration storage, and medical device calibration data retention requiring stable component supply across multi-year production lifecycles.
Supply support for 93LC76CT-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 93LC76 series targets cost-sensitive, low-power embedded systems needing reliable nonvolatile storage with minimal pin count and flexible memory organization - especially where automotive qualification and hardware write protection are essential.
FAQ
What is the function of the ORG pin on the 93LC76CT-E/MS?
The ORG pin on the 93LC76CT-E/MS 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 hardwired to VCC or VSS - floating is not allowed. The 93LC76CT-E/MS uses this feature to maintain firmware compatibility across 8-bit and 16-bit host systems without layout changes.
Does the 93LC76CT-E/MS require an external pull-up resistor on the DO line?
No, the 93LC76CT-E/MS does not require an external pull-up on DO. The DO pin actively drives high/low during read or Ready/Busy status reporting and enters High-Z when inactive. However, if DI and DO are shorted (shared bus), a current-limiting resistor (e.g., 10 kΩ) is required between them to prevent bus conflict during dummy-zero read phases.
What happens if the PE pin is left unconnected on the 93LC76CT-E/MS?
The PE pin on the 93LC76CT-E/MS must never be left floating - it must be tied to either VCC (to enable writes) or VSS (to disable all erase/write operations). An unconnected PE pin violates the absolute maximum ratings and may cause unpredictable behavior, including unintended writes or failure to program. The 93LC76CT-E/MS datasheet explicitly states PE cannot be floated.
Can the 93LC76CT-E/MS operate at 1.8 V?
No, the 93LC76CT-E/MS has a minimum VCC of 2.5 V and is not rated for 1.8 V operation. Devices in the 93AA76 family support 1.8 V, but the 93LC76 family (including 93LC76CT-E/MS) is specified only from 2.5 V to 5.5 V. Attempting 1.8 V operation will result in undefined behavior, failed writes, or loss of data retention guarantees.
Is the 93LC76CT-E/MS pin-compatible with the 93LC76C-I/MS?
Yes, the 93LC76CT-E/MS and 93LC76C-I/MS share identical MSOP-8 pinout, electrical characteristics, and instruction set. The only differences are temperature grade (E = –40°C to +125°C vs I = –40°C to +85°C) and automotive qualification. No PCB or firmware changes are required when upgrading from 93LC76C-I/MS to 93LC76CT-E/MS for enhanced thermal robustness.
93LC76CT-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:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
93LC76CT-E/MS FAQ
1.How can I place an order for 93LC76CT-E/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC76CT-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 93LC76CT-E/MS reliable?
The price and inventory of 93LC76CT-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 93LC76CT-E/MS is usually 5 days.
3.What payment methods are accepted for 93LC76CT-E/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC76CT-E/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC76CT-E/MS?
93LC76CT-E/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC76CT-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 93LC76CT-E/MS?
For technical support, including 93LC76CT-E/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC76CT-E/MS requirements.
6.How does Aetrix verify that 93LC76CT-E/MS is sourced from the original manufacturer or authorized distributors?
All 93LC76CT-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 93LC76CT-E/MS meets industry standards.
7.What is the process for return or replacement of 93LC76CT-E/MS?
All 93LC76CT-E/MS units undergo pre-shipment inspection (PSI). If there is an issue with 93LC76CT-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 93LC76CT-E/MS part is unused and in its original packaging.
Return procedure for 93LC76CT-E/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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