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Microchip Technology 93C76CT-I/MS
- Part No.:
- 93C76CT-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
93C76CT-I/MS.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,235
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Product details
Overview
93C76CT-I/MS from Microchip Technology Inc. is an 8Kbit, 4.5–5.5V serial EEPROM with 8-bit organization (fixed, no ORG pin), MSOP-8 package, industrial temperature range (–40°C to +85°C), and Microwire-compatible 3-wire interface. It provides nonvolatile storage for configuration data in embedded control systems requiring low-power, high-reliability memory with write-protection and status polling.
For engineers reviewing the 93C76CT-I/MS datasheet, 93C76CT-I/MS pinout, 93C76CT-I/MS application, or 93C76CT-I/MS equivalent, key selection criteria include its fixed 8-bit x1024 organization, 2 ms erase/write cycle time at 4.5–5.5V, PE-disabled-by-default programming security, Ready/Busy status via DO pin, and compatibility with legacy Microwire controllers in space-constrained industrial designs.
Technical Context
The 93C76CT-I/MS implements a synchronous 3-wire Microwire interface with CS, CLK, and DI/DO lines, supporting READ, WRITE, ERASE, EWEN/EWDS, ERAL, and WRAL instructions. Its internal logic enforces power-on write disable and requires explicit EWEN before any programming operation.
Unlike C-variant parts, this A-version device lacks ORG and PE pins - programming is always enabled, and memory organization is permanently fixed at 1024 × 8-bit. VCC brown-out protection activates below 3.8V, preventing inadvertent writes during power ramp-up or dropout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (1024 × 8-bit) - fixed organization; no external word-size configuration required. |
| VCC operating range | 4.5 V to 5.5 V - compatible with 5V logic systems; brown-out lockout below 3.8V prevents corruption. |
| Erase/write cycle time | 2 ms - self-timed; enables predictable timing budgeting without external delay management. |
| Endurance | 1,000,000 cycles - supports frequent field updates in calibration or logging applications. |
| Data retention | 200 years - ensures long-term integrity of stored firmware parameters or device IDs. |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - minimal GPIO usage; no SPI mode or address latching overhead. |
| Temperature range | –40°C to +85°C (Industrial) - validated for use in motor drives, PLC I/O modules, and industrial sensors. |
Pinout & Package
8-lead MSOP (150 mil) package, Pb-free Matte Tin finish, footprint compatible with SOIC-8 but 35% smaller area. Pin 1 marked by laser dot; exposed pad not present (unlike DFN/TDFN variants).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-high enable; must be held low ≥250 ns between commands; deselects device into standby (ICC ≤ 1 µA). |
| 2 (CLK) | Serial Clock | Rising-edge synchronized; clocks opcode/address/data; stoppable mid-sequence without error. |
| 3 (DI) | Data Input | Accepts Start bit, instruction opcodes, addresses, and write data; no internal pull-up/down. |
| 4 (DO) | Data Output / Status | Outputs read data or Ready/Busy (low = busy); tri-states on CS fall; requires external pull-up for status polling. |
| 5 (VSS) | Ground | Reference for all I/O and internal logic; must be low-impedance connection to minimize noise coupling. |
| 6 (NC) | No Connect | Not bonded; left unconnected per Microchip design - no routing or termination required. |
| 7 (NC) | No Connect | Not bonded; electrically isolated - no PCB trace or thermal pad needed. |
| 8 (VCC) | Power Supply | 4.5–5.5V only; decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control or software delays - reduces firmware complexity and interrupt latency. |
| Ready/Busy status on DO | Enables efficient polling-based programming flow without dedicated status registers or additional I/O pins. |
| Power-on write protection | Automatically powers up in EWDS mode - prevents accidental writes during boot or reset sequences. |
| 100 pF load-compatible timing | Guarantees AC performance (e.g., TPD ≤ 400 ns) with standard microcontroller GPIO drive strength and PCB trace capacitance. |
| Pb-free and RoHS compliant | Meets global environmental compliance requirements for industrial and automotive supply chains without derating. |
Applications
| Motor Control Configuration Storage | Industrial Sensor Calibration Data |
|---|---|
Use Scenario: Storing motor pole count, current limits, and commutation offsets in BLDC driver firmware. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed during initialization; 2 ms write time fits within safe startup window. Use Value: Enables field-updatable motor profiles without reprogramming MCU flash; 1M endurance supports >10 years of recalibration cycles. | Use Scenario: Retaining factory-trimmed gain/offset coefficients and linearization tables for analog sensor front-ends. IC Role / Device Role / Timing Role: Dedicated calibration memory mapped via simple GPIO bit-banging; no SPI peripheral required. Use Value: Eliminates need for precision voltage references or trimming potentiometers; improves production test throughput and long-term accuracy stability. |
| PLC I/O Module Identity | Medical Device Usage Log |
Use Scenario: Holding module type, slot position, firmware version, and channel count in modular automation hardware. IC Role / Device Role / Timing Role: System identity register accessed at power-on; read-only during runtime except for firmware updates. Use Value: Allows hot-swap detection and automatic configuration loading; 200-year retention ensures lifetime validity across equipment service life. | Use Scenario: Recording procedure timestamps, operator IDs, and error events in portable diagnostic instruments. IC Role / Device Role / Timing Role: Event logger with atomic write capability; WRAL instruction enables full-log backup before power loss. Use Value: Meets IEC 62304 data integrity requirements; 5.5V VCC margin ensures reliable logging during battery voltage sag. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93C76A-I/SN | Same 8Kbit × 8-bit organization and 4.5–5.5V range, but in SOIC-8 package (5.3 mm × 4.4 mm vs. MSOP-8's 3.0 mm × 3.0 mm). | Requires larger PCB area; better thermal dissipation and hand-soldering accessibility. | Select when board space permits and manual assembly or higher thermal mass is preferred. |
| 93LC76A-I/MS | 2.5–5.5V VCC range, same MSOP-8 package; otherwise identical instruction set and timing. | Supports wider supply range including 3.3V systems; not suitable for 5V-only designs with tight VCC tolerance. | Select when migrating to mixed-voltage systems or requiring backward compatibility with 3.3V controllers. |
Compared with 93C76A-I/SN and 93LC76A-I/MS, the 93C76CT-I/MS offers the smallest footprint among 5V-only 8Kbit Microwire EEPROMs while maintaining identical functional behavior and industrial-grade reliability - ideal for miniaturized industrial controls where space and 5V compatibility are primary constraints.
Availability
93C76CT-I/MS is available at Aetrix Electronics and suitable for motor control configuration storage, industrial sensor calibration data retention, and PLC I/O module identity management requiring stable component supply across extended product lifecycles.
Supply support for 93C76CT-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 memory solutions, headquartered in Chandler, Arizona, with global manufacturing and support infrastructure.
The 93Cxx series was designed specifically for cost-sensitive, space-constrained industrial and automotive applications requiring robust, low-pin-count serial EEPROM with deterministic timing and high data integrity - prioritizing ease of integration over feature bloat.
FAQ
What is the memory organization of the 93C76CT-I/MS?
The 93C76CT-I/MS has a fixed 1024 × 8-bit organization. Unlike C-variant parts, it lacks an ORG pin and is not configurable for 16-bit operation. This simplifies PCB layout and firmware design by eliminating external logic for word-size selection, making it ideal for legacy 8-bit Microwire systems.
Does the 93C76CT-I/MS require an external pull-up resistor on the DO pin?
Yes, the 93C76CT-I/MS requires an external pull-up resistor (typically 4.7 kΩ to 10 kΩ) on the DO pin to reliably detect Ready/Busy status during erase/write operations. The DO pin is open-drain during status reporting, and without pull-up, the logic level cannot be interpreted - this is explicitly required for polling-based programming flows.
Can the 93C76CT-I/MS operate at 3.3V?
No, the 93C76CT-I/MS is rated for 4.5V to 5.5V only. Attempting operation below 4.5V risks data corruption due to VCC brown-out detection triggering at 3.8V. For 3.3V systems, consider the functionally identical 93LC76A-I/MS, which supports 2.5–5.5V operation and shares the same MSOP-8 footprint.
How does write protection work on the 93C76CT-I/MS?
The 93C76CT-I/MS uses Erase/Write Enable/Disable (EWEN/EWDS) commands for software-controlled write protection. It powers up in EWDS mode, blocking all programming until EWEN is issued. No hardware PE pin exists on this A-variant part - protection relies entirely on correct command sequencing, making it simpler than C-variants but requiring disciplined firmware handling.
What is the maximum clock frequency supported by the 93C76CT-I/MS?
The 93C76CT-I/MS supports up to 3 MHz clock frequency when VCC is 4.5–5.5V. At this rate, READ and WRITE instructions complete in 22 and 22 clock cycles respectively, enabling sub-10 µs read access and ~7 µs write initiation - sufficient for real-time configuration loading in industrial motion controllers without impacting main CPU throughput.
93C76CT-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:
- 2ms
- Access Time:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
93C76CT-I/MS FAQ
1.How can I place an order for 93C76CT-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C76CT-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 93C76CT-I/MS reliable?
The price and inventory of 93C76CT-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 93C76CT-I/MS is usually 5 days.
3.What payment methods are accepted for 93C76CT-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C76CT-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C76CT-I/MS?
93C76CT-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C76CT-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 93C76CT-I/MS?
For technical support, including 93C76CT-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C76CT-I/MS requirements.
6.How does Aetrix verify that 93C76CT-I/MS is sourced from the original manufacturer or authorized distributors?
All 93C76CT-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 93C76CT-I/MS meets industry standards.
7.What is the process for return or replacement of 93C76CT-I/MS?
All 93C76CT-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 93C76CT-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 93C76CT-I/MS part is unused and in its original packaging.
Return procedure for 93C76CT-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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