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Microchip Technology 93C76AT-E/OT
- Part No.:
- 93C76AT-E/OT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SOT-23-6
- Datasheet:
-
93C76AT-E/OT.pdf
- Description:
- IC EEPROM 8KBIT MIC WIRE SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,651
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Product details
Overview
93C76AT-E/OT from Microchip Technology Inc. is an 8K-bit, 4.5–5.5V serial EEPROM with fixed 8-bit organization (no ORG pin), industrial/automotive temperature range (–40°C to +125°C), and Microwire-compatible 3-wire interface. It delivers 1 million erase/write cycles, >200-year data retention, and integrated power-on/off data protection - used in automotive body control modules for storing calibration data and configuration settings.
For engineers reviewing the 93C76AT-E/OT datasheet, 93C76AT-E/OT pinout, 93C76AT-E/OT application, or 93C76AT-E/OT equivalent, key selection considerations include its 6-lead SOT-23 package, absence of ORG/PE pins, 2 ms program cycle time, VCC ≥4.5V requirement for ERAL/WRAL, and Ready/Busy status via DO pin during write operations.
Technical Context
This device implements a synchronous Microwire-compatible serial interface with CS, CLK, DI, and DO signals. All instructions - READ, WRITE, ERASE, ERAL, WRAL, EWEN, and EWDS - are initiated by a Start bit followed by opcode, address, and data bits clocked on CLK rising edges. The DO pin serves dual function: serial data output during READ and Ready/Busy status indicator during programming.
It operates exclusively in 8-bit mode (x8 organization) with no ORG pin support, and lacks Program Enable (PE) functionality - write enable is controlled solely by EWEN/EWDS commands. Power-on reset logic disables writes until EWEN is issued, and VCC detect circuitry inhibits operation below 3.8V to prevent corruption.
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 - requires stable ≥4.5V supply for ERAL/WRAL execution |
| Temp range | –40°C to +125°C (Automotive grade E) - qualified for under-hood applications |
| Write cycle time | 2 ms (TWC) - self-timed; no external timing control needed |
| Endurance | 1,000,000 erase/write cycles - validated at 25°C, VCC = 5.0 V |
| Data retention | >200 years - guaranteed nonvolatile storage without refresh |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - no I²C or SPI protocol |
Pinout & Package
Package: 6-lead SOT-23 (OT suffix), Pb-free Matte Tin finish, footprint compatible with JEDEC MO-178AA. Compact 2.9 mm × 1.6 mm × 1.1 mm profile ideal for space-constrained automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DO | Data Output / Ready-Busy Status | Tri-state output: delivers read data or asserts low during active erase/write; high = ready |
| VSS | Ground Reference | Primary return path for all internal logic and I/O; must be low-impedance |
| DI | Data Input | Serial input for Start bit, opcodes, addresses, and write data - synchronized to CLK rising edge |
| VCC | Power Supply | 4.5–5.5 V supply; internal POR circuit blocks operation below 3.8 V |
| CS | Chip Select | Active-high enable; device enters Standby when low; TCSL ≥250 ns required between commands |
| CLK | Serial Clock | Synchronizes all data transfers; max 3 MHz at VCC ≥4.5 V; clock may pause mid-transfer |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed Erase/Write | Eliminates need for external timing circuitry - internal state machine manages auto-erase before write |
| Power-On/Off Data Protection | Hardware VCC monitor prevents writes during brown-out or power ramp-up/down |
| Ready/Busy Status via DO | Enables polling-based firmware flow control without dedicated status lines or interrupts |
| Sequential Read Mode | Continuous data stream across memory addresses with single CS assertion - reduces command overhead |
| EWEN/EWDS Write Lock | Software-controlled write-enable gating prevents accidental overwrites during normal operation |
Applications
| Automotive Body Control Unit | Industrial Sensor Calibration Storage |
|---|---|
Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in vehicle BCMs subject to wide thermal cycling and vibration. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed via microcontroller's Microwire peripheral during boot and runtime updates. Use Value: Guaranteed 200-year data retention and 1M-cycle endurance ensure lifetime reliability without field recalls or recalibration. | Use Scenario: Retaining factory-trimmed offset/gain coefficients for pressure and temperature sensors in harsh industrial environments. IC Role / Device Role / Timing Role: Dedicated calibration memory mapped to MCU via GPIO-banged Microwire interface; accessed only during sensor initialization. Use Value: –40°C to +125°C operation and VCC brown-out protection prevent data corruption during power interruptions in factory automation systems. |
| Medical Device Configuration Memory | Smart Meter Firmware Parameter Storage |
Use Scenario: Holding user-defined alarm thresholds, display brightness, and language settings in portable diagnostic equipment. IC Role / Device Role / Timing Role: Low-power serial EEPROM interfaced to ARM Cortex-M0+ MCU; accessed infrequently but must survive 10+ year shelf life. Use Value: <1 µA standby current (ICCS) and >200-year data retention meet IEC 62304 Class C software lifecycle requirements. | Use Scenario: Storing tariff tables, communication keys, and metering constants in ANSI C12.19-compliant smart electricity meters deployed outdoors. IC Role / Device Role / Timing Role: Secure parameter store isolated from main MCU flash; updated only during firmware upgrades or utility reprogramming events. Use Value: Automotive-grade temperature rating and 4.5–5.5 V operation align with meter auxiliary power rails and extended outdoor deployment conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC76BT-E/OT | Same 6-lead SOT-23 package and automotive temp grade, but 16-bit organization (x16); requires ORG pin tied low externally | Supports wider data bus access per instruction - beneficial for firmware update metadata with 16-bit fields | Select if system firmware uses 16-bit word-aligned reads/writes and can route ORG to ground |
| AT25DF041A-SH-T | Quad SPI interface, 4 Mbit density, 2.7–3.6 V operation - not Microwire-compatible; different command set and timing | Designed for high-speed code shadowing or logging; incompatible pinout and protocol stack | Choose only when migrating to SPI-based architecture with higher bandwidth needs and voltage compatibility |
Compared with 93LC76BT-E/OT, the 93C76AT-E/OT offers simpler 8-bit addressing and eliminates ORG routing; versus AT25DF041A-SH-T, it provides drop-in Microwire compatibility and automotive VCC range but lower density and bandwidth.
Availability
93C76AT-E/OT is available at Aetrix Electronics and suitable for automotive body control units, industrial sensor calibration storage, and medical device configuration memory requiring stable component supply across long production lifecycles.
Supply support for 93C76AT-E/OT 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, with global design and manufacturing operations.
The 93Cxx series was designed specifically for cost-sensitive, low-power, nonvolatile memory applications in automotive and industrial systems where Microwire interface simplicity and robust data integrity are critical.
FAQ
What is the memory organization of the 93C76AT-E/OT?
The 93C76AT-E/OT has a fixed 8-bit (x8) organization - 1024 words × 8 bits - with no ORG pin. Unlike 'C' variants, it does not support 16-bit mode. This simplifies PCB layout by eliminating ORG routing and ensures deterministic 8-bit data framing in all operations including READ, WRITE, and ERASE.
Does the 93C76AT-E/OT support the Program Enable (PE) pin?
No, the 93C76AT-E/OT does not include a PE pin. As a '76A' variant, it relies solely on EWEN/EWDS commands for write protection. Programming is enabled only after issuing EWEN; no hardware-level PE signal is present. This distinguishes it from 93C76CT-E/OT, which requires PE = VCC to allow writes.
What is the minimum VCC required for ERAL and WRAL operations on the 93C76AT-E/OT?
The 93C76AT-E/OT requires VCC ≥4.5 V for reliable ERAL (Erase All) and WRAL (Write All) execution. Below this threshold, these commands may fail or produce undefined behavior. The internal VCC detector (VPOR = 3.8 V typical) blocks all operations below 3.8 V, but ERAL/WRAL specifically mandate the higher 4.5 V minimum per datasheet Table 1-2, A14 and A15.
Can the 93C76AT-E/OT be used in place of the 93AA76AT-I/OT?
No - the 93C76AT-E/OT is not a direct replacement for 93AA76AT-I/OT. While both are 8-bit EEPROMs in SOT-23, they differ in VCC range (4.5–5.5 V vs. 1.8–5.5 V), temperature grade (E vs. I), and power-on behavior (VPOR = 3.8 V vs. 1.5 V). Substituting them risks brown-out corruption in low-voltage systems or insufficient margin in high-temp automotive use.
How is Ready/Busy status monitored on the 93C76AT-E/OT?
Ready/Busy status is monitored by polling the DO pin: DO = low indicates ongoing erase/write; DO = high means operation complete. To read status, CS must be brought high for ≥250 ns (TCSL) after initiating the command. DO returns to High-Z when CS goes low, and status remains latched until cleared by issuing a Start bit followed by CS low.
93C76AT-E/OT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- 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:
- SOT-23-6
93C76AT-E/OT FAQ
1.How can I place an order for 93C76AT-E/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C76AT-E/OT 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/OT reliable?
The price and inventory of 93C76AT-E/OT 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/OT is usually 5 days.
3.What payment methods are accepted for 93C76AT-E/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C76AT-E/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C76AT-E/OT?
93C76AT-E/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C76AT-E/OT 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/OT?
For technical support, including 93C76AT-E/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C76AT-E/OT requirements.
6.How does Aetrix verify that 93C76AT-E/OT is sourced from the original manufacturer or authorized distributors?
All 93C76AT-E/OT 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/OT meets industry standards.
7.What is the process for return or replacement of 93C76AT-E/OT?
All 93C76AT-E/OT units undergo pre-shipment inspection (PSI). If there is an issue with 93C76AT-E/OT, 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/OT part is unused and in its original packaging.
Return procedure for 93C76AT-E/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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