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Microchip Technology 93C76AT-E/MS
- Part No.:
- 93C76AT-E/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
93C76AT-E/MS.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,789
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Product details
Overview
93C76AT-E/MS from Microchip Technology Inc. is an 8K-bit, 4.5–5.5V serial EEPROM with 1024 × 8-bit organization, Microwire-compatible 3-wire interface (CS/CLK/DI/DO), and industrial-temperature operation (–40°C to +85°C). It features self-timed erase/write cycles, Ready/Busy status output on DO, and power-on/off data protection - deployed in embedded system configuration storage and sensor calibration memory.
For engineers reviewing the 93C76AT-E/MS datasheet, 93C76AT-E/MS pinout, 93C76AT-E/MS application, or 93C76AT-E/MS equivalent, key selection criteria include VCC range (4.5–5.5V), 8-bit x1024 organization, MSOP-8 package compatibility, 2 ms program cycle time, and absence of ORG/PE pins - distinguishing it from C-variant devices.
Technical Context
This device implements a synchronous Microwire-compatible serial interface with strict timing requirements: max clock frequency of 3 MHz at VCC ≥ 4.5V, TCKH/TCKL ≥ 200/100 ns, and CS setup/hold times of 50 ns/0 ns. All instructions (READ, WRITE, ERASE, EWEN, EWDS) are initiated by a Start bit followed by opcode, address, and data bits clocked on CLK rising edges.
It operates exclusively in fixed 8-bit mode (no ORG pin), lacks Program Enable (PE) functionality, and relies on EWEN/EWDS commands for write protection. Power-down behavior includes automatic entry into Standby mode when CS is low, with internal POR circuitry asserting at VCC ≥ 3.8V to prevent inadvertent writes during brown-out conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (1024 × 8-bit organization) |
| VCC operating range | 4.5 V to 5.5 V - ensures compatibility with 5V logic systems and rejects marginal supply conditions below 3.8V POR threshold |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI, DO) - requires no I²C pull-ups or SPI SS management |
| Write endurance | 1,000,000 erase/write cycles - supports frequent field-updatable parameter storage |
| Data retention | 200 years at 25°C - suitable for long-lifecycle industrial equipment without refresh |
| Program cycle time | 2 ms (TWC) - enables fast firmware patching or calibration updates in real-time systems |
| Temperature grade | Industrial (–40°C to +85°C) - validated for deployment in motor drives, PLCs, and outdoor instrumentation |
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 per datasheet Note 1). Pin 1 marked by laser dot; pin 1 ID corner defined by bevelled edge.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-high enable - must be held low ≥250 ns between instructions; deselects device and forces Standby mode |
| 2 (CLK) | Serial Clock | Synchronizes all data transfers on rising edge; stoppable mid-sequence without state corruption |
| 3 (DI) | Data Input | Accepts Start bit, opcodes, addresses, and write data; high-impedance when not selected |
| 4 (DO) | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge |
| 5 (VSS) | Ground | Reference return path for all signals; must be low-impedance to minimize noise coupling |
| 6 (VCC) | Power Supply | 4.5–5.5V supply with internal POR at 3.8V - prevents writes during power ramp |
| 7, 8 | No Connect | Not bonded - left unconnected per MSOP-8 variant for 93C76A/B; no internal function |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control - internal state machine manages auto-erase before write |
| Ready/Busy status on DO | Enables polling-based firmware flow control without dedicated interrupt lines or timers |
| Power-on/off data protection | Hardware-enforced write inhibition below VCC = 3.8V - prevents corruption during brown-out or hot-swap |
| Sequential read mode | Reduces host CPU overhead - continuous data stream with single CS assertion across multiple addresses |
| Pb-free & RoHS compliant | Matte tin finish on all leads - meets global environmental compliance for industrial and automotive supply chains |
Applications
| Motor Control Configuration Storage | Industrial Sensor Calibration Memory |
|---|---|
Use Scenario: Storing motor phase alignment offsets, current limit thresholds, and PID tuning parameters in servo drives. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during boot and runtime via Microwire interface. Use Value: Enables field recalibration without firmware reflash; 200-year retention ensures parameter integrity over equipment lifetime. | Use Scenario: Holding factory-trimmed temperature/pressure compensation coefficients in smart transmitters. IC Role / Device Role / Timing Role: Read-once-write-rarely memory mapped to microcontroller's peripheral bus via GPIO bit-banged Microwire. Use Value: 1M endurance supports periodic recalibration; 2 ms write time allows updates during maintenance windows. |
| Medical Device Setup Parameters | Energy Meter Firmware Patch Storage |
Use Scenario: Retaining user-defined alarm thresholds, display brightness, and language settings in portable diagnostic tools. IC Role / Device Role / Timing Role: Low-power serial EEPROM interfaced to 8-bit MCU with minimal GPIO count. Use Value: 500 µA max read current and 1 µA standby current extend battery life in handheld units. | Use Scenario: Storing signed firmware patches for secure OTA updates in smart electricity meters. IC Role / Device Role / Timing Role: Secure nonvolatile storage for cryptographic keys and update payloads accessed only during verified boot. Use Value: Hardware write protection via EWEN/EWDS prevents tampering; 4.5–5.5V range matches meter auxiliary supply rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC76AT-I/MS | VCC range 2.5–5.5V; same 8-bit organization and MSOP-8 package; includes ORG/PE pins (NC on A-variant) | Supports wider supply range including 3.3V systems; identical pinout but requires unused pins tied to VSS/VCC per datasheet | Select when migrating to mixed-voltage designs or requiring future upgrade path to 93LC76C with configurable word size |
| AT25080B-MAHL-T | 8K-bit SPI interface (4-wire), 1.8–5.5V, SOIC-8 package; no Ready/Busy pin - uses WIP flag in status register | Requires SPI controller instead of bit-banged Microwire; different timing model and command set | Choose for systems already using SPI peripherals; avoid if legacy Microwire firmware cannot be modified |
Compared with 93C76AT-E/MS, the 93LC76AT-I/MS offers broader voltage flexibility while maintaining pin compatibility, whereas the AT25080B-MAHL-T trades Microwire simplicity for SPI integration - both require layout review due to differing signal routing and decoupling needs.
Availability
93C76AT-E/MS is available at Aetrix Electronics and suitable for motor control configuration storage, industrial sensor calibration memory, and medical device setup parameters requiring stable component supply across extended product lifecycles.
Supply support for 93C76AT-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 components, and memory solutions, headquartered in Chandler, Arizona.
The 93C76AT-E/MS belongs to Microchip's legacy 93XX serial EEPROM family, designed specifically for cost-sensitive, low-pin-count embedded systems requiring reliable nonvolatile storage with minimal external components.
FAQ
What is the maximum clock frequency supported by the 93C76AT-E/MS?
The 93C76AT-E/MS supports a maximum clock frequency of 3 MHz when VCC is between 4.5V and 5.5V. At lower voltages within its specified range, timing margins tighten - e.g., TCKH/TCKL minimums increase to 250/200 ns at 2.5–4.5V, though 93C76AT-E/MS is rated only for 4.5–5.5V operation. This ensures robust communication in noisy industrial environments.
Does the 93C76AT-E/MS have an ORG or PE pin?
No, the 93C76AT-E/MS does not include ORG or PE pins. As a '76A' variant, it is fixed at 8-bit organization and always enables programming - unlike '76C' versions which use ORG to select 8/16-bit mode and PE to gate write access. Pins 7 and 8 in its MSOP-8 package are No Connect.
How is write protection implemented on the 93C76AT-E/MS?
Write protection on the 93C76AT-E/MS is implemented exclusively through firmware commands: Erase/Write Enable (EWEN) must precede any ERASE or WRITE instruction, and Erase/Write Disable (EWDS) locks the array afterward. There is no hardware write-protect pin - the device powers up in EWDS mode, requiring explicit EWEN before first programming.
What package type is used for the 93C76AT-E/MS?
The 93C76AT-E/MS uses 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 "3C76AT" appears on the top surface, and the temperature grade "E" indicates Industrial (–40°C to +85°C) rating - distinct from Automotive "E" grade in other families.
Can the 93C76AT-E/MS be used in 3.3V systems?
No, the 93C76AT-E/MS is not rated for 3.3V operation. Its absolute minimum VCC is 4.5V, and its power-on reset (POR) circuit activates at 3.8V to inhibit writes - meaning it will remain in write-protected Standby mode below 4.5V. For 3.3V designs, consider the 93LC76AT-I/MS (2.5–5.5V) or AT25080B-MAHL-T (1.8–5.5V) as alternatives.
93C76AT-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
- 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
93C76AT-E/MS FAQ
1.How can I place an order for 93C76AT-E/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C76AT-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 93C76AT-E/MS reliable?
The price and inventory of 93C76AT-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 93C76AT-E/MS is usually 5 days.
3.What payment methods are accepted for 93C76AT-E/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C76AT-E/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C76AT-E/MS?
93C76AT-E/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C76AT-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 93C76AT-E/MS?
For technical support, including 93C76AT-E/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C76AT-E/MS requirements.
6.How does Aetrix verify that 93C76AT-E/MS is sourced from the original manufacturer or authorized distributors?
All 93C76AT-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 93C76AT-E/MS meets industry standards.
7.What is the process for return or replacement of 93C76AT-E/MS?
All 93C76AT-E/MS units undergo pre-shipment inspection (PSI). If there is an issue with 93C76AT-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 93C76AT-E/MS part is unused and in its original packaging.
Return procedure for 93C76AT-E/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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