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Microchip Technology 93C76AT-I/OT
- Part No.:
- 93C76AT-I/OT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SOT-23-6
- Datasheet:
-
93C76AT-I/OT.pdf
- Description:
- IC EEPROM 8KBIT MIC WIRE SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:239
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Product details
Overview
93C76AT-I/OT from Microchip Technology Inc. is an 8K-bit, 4.5–5.5V serial EEPROM with fixed 8-bit organization (no ORG pin), industrial temperature range (−40°C to +85°C), and SOT-23-6 package. It implements Microwire-compatible 3-wire serial interface (CS/CLK/DI/DO), supports self-timed erase/write cycles (2 ms typical), and delivers 1 million endurance cycles with >200-year data retention - used for configuration storage in embedded controllers and power management ICs.
For engineers reviewing the 93C76AT-I/OT datasheet, 93C76AT-I/OT pinout, 93C76AT-I/OT application, or 93C76AT-I/OT equivalent, key selection criteria include VCC operating range (4.5–5.5V), absence of ORG/PE pins (distinguishing it from 'C' variants), SOT-23-6 footprint constraints, 2 ms write cycle time, and compatibility with legacy Microwire host controllers requiring strict timing compliance per DS21796M.
Technical Context
This device belongs to the 93Cxx family of serial EEPROMs using synchronous Microwire protocol with start-bit detection, opcode-driven instruction set (READ/ERASE/ERAL/WRAL/EWEN/EWDS), and Ready/Busy status signaled via DO pin during programming. It lacks ORG and PE pins - confirming fixed 8-bit organization and always-enabled write capability.
Operation requires CS high for ≥250 ns between instructions, CLK rising-edge sampling for all data, and VCC ≥4.5V for ERAL/WRAL execution. Power-on reset disables writes until EWEN is issued; data protection is enforced by internal voltage detection (VPOR = 3.8V) and automatic EWDS on power-up.
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 - must exceed 3.8 V for POR release and ERAL/WRAL operation |
| Write cycle time | 2 ms - self-timed; no external delay required after last CLK edge |
| Endurance | 1,000,000 erase/write cycles - validated at 25°C, VCC = 5.0 V |
| Data retention | >200 years - specified under normal operating conditions |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI, DO) - no SPI or I²C protocol support |
| Temperature range | −40°C to +85°C (Industrial grade) - not rated for automotive (E-temp) use |
Pinout & Package
Package: SOT-23-6 (6-lead small-outline transistor), Pb-free matte tin finish, 2.9 mm × 1.6 mm footprint, 1.1 mm max height. Pin 1 marked by laser dot; pin 1 ID corner defined per JEDEC MO-178.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | DO (Data Out) | Serial output for READ data and Ready/Busy status (low = busy); high-Z when CS low or idle |
| 2 | VSS | Ground reference - must be connected directly to system GND plane |
| 3 | DI (Data In) | Serial input for opcodes, addresses, and write data; sampled on CLK rising edge |
| 4 | CLK | Serial clock input - rising edge clocks all data; TCKH/TCKL min/max defined per VCC |
| 5 | CS | Chip select - high enables device; must be low ≥250 ns between commands |
| 6 | VCC | Power supply - 4.5–5.5 V only; VPOR threshold at 3.8 V prevents operation below safe margin |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 8-bit organization | No ORG pin required - eliminates external logic and layout complexity for x8 systems |
| Self-timed erase/write | 2 ms typical cycle time - removes need for host-controlled timing delays or polling overhead |
| Ready/Busy status on DO | Single-pin status signaling - simplifies interface vs. dedicated BUSY pin; avoids extra GPIO |
| Power-on data protection | VPOR = 3.8 V ensures write inhibition until stable VCC - prevents corruption during brown-out |
| 100% tested AC/DC parameters | Guaranteed timing (e.g., TCKH = 200 ns @ 4.5–5.5 V) - enables reliable timing closure in 3 MHz systems |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Storing calibration offsets and user-defined I/O mapping in programmable logic controllers deployed in factory automation cabinets. IC Role / Device Role / Timing Role: Nonvolatile configuration register - retains settings across power cycles and supports field updates via service port. Use Value: 1M endurance and >200-year retention ensure reliability over 15+ year equipment lifecycles without replacement. | Use Scenario: Holding door lock actuator firmware patches and seat position presets in BCMs operating in engine bay-adjacent locations. IC Role / Device Role / Timing Role: Secondary boot configuration store - loaded at MCU startup to configure CAN message routing and PWM duty cycles. Use Value: Industrial temp rating (−40°C to +85°C) and 4.5–5.5 V VCC range match BCM power rail behavior during cold cranking and load dump events. |
| Medical Infusion Pump Parameter Backup | Smart Energy Meter Firmware Settings |
Use Scenario: Preserving drug library metadata and alarm thresholds in battery-backed infusion pumps subject to IEC 60601-1 safety requirements. IC Role / Device Role / Timing Role: Safety-critical parameter vault - accessed only during initialization or maintenance mode; write-protected by hardware VPOR. Use Value: VPOR = 3.8 V prevents accidental writes during brown-out recovery, meeting fault tolerance requirements for Class II medical devices. | Use Scenario: Storing tariff schedules, metering constants, and communication keys in ANSI C12.22-compliant smart meters with 10+ year field deployment. IC Role / Device Role / Timing Role: Secure configuration archive - updated infrequently but requiring guaranteed integrity across decades. Use Value: >200-year data retention and 1M endurance eliminate field replacement logistics and support lifetime metrology certification. |
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/OT | VCC range 2.5–5.5 V; same 8-bit organization, SOT-23-6 package, and pinout | Supports wider supply range - suitable for mixed-voltage systems with 3.3 V logic rails | Select if system VCC may dip below 4.5 V; verify timing margins at 2.5 V (TCKH/TCKL increase to 450 ns) |
| 93AA76AT-I/OT | VCC range 1.8–5.5 V; identical pinout and 8-bit organization; lower VPOR (1.5 V) | Enables ultra-low-power sleep modes and battery-backed operation down to 1.8 V | Choose for energy-harvesting or coin-cell-powered designs where 4.5 V minimum is prohibitive |
Compared with 93C76AT-I/OT, the 93LC76AT-I/OT extends supply flexibility for 3.3 V systems, while the 93AA76AT-I/OT enables true low-voltage operation - neither offers ORG/PE functionality, preserving direct drop-in compatibility for fixed-x8 use cases.
Availability
93C76AT-I/OT is available at Aetrix Electronics and suitable for industrial control, medical device, and smart meter applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 93C76AT-I/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 EEPROM product line targets cost-sensitive, space-constrained embedded systems requiring robust nonvolatile storage with minimal external components and proven field reliability - optimized for industrial, medical, and metering applications.
FAQ
What is the maximum clock frequency supported by the 93C76AT-I/OT?
The 93C76AT-I/OT supports up to 3 MHz clock frequency when VCC is 4.5–5.5 V. This is specified in Table 1-2 (A1) of DS21796M. At this rate, the minimum clock high time (TCKH) is 200 ns and minimum clock low time (TCKL) is 100 ns. Exceeding 3 MHz violates AC timing and may cause opcode misreads or data corruption.
Does the 93C76AT-I/OT have an ORG or PE pin?
No, the 93C76AT-I/OT does not include ORG or PE pins. As confirmed in the Device Selection Table and Pin Function Table of DS21796M, only 'C' variants (e.g., 93C76C) feature these pins. The 'A' variant (93C76A) has fixed 8-bit organization and always-enabled write capability - matching the 93C76AT-I/OT's behavior.
What is the purpose of the VPOR specification for the 93C76AT-I/OT?
The VPOR (VCC Power-On Reset) threshold for the 93C76AT-I/OT is 3.8 V, as stated in Table 1-1 (D11). This means the device inhibits all write operations until VCC rises above 3.8 V, preventing data corruption during power ramp-up or brown-out conditions - a critical safeguard for industrial systems with unstable supplies.
Can the 93C76AT-I/OT be used in automotive applications requiring −40°C to +125°C operation?
No, the 93C76AT-I/OT is rated only for Industrial temperature range (−40°C to +85°C), indicated by the 'I' suffix. Automotive-grade operation (−40°C to +125°C) requires the 'E' suffix (e.g., 93C76AT-E/OT), which is a different orderable part with distinct qualification testing and higher VPOR tolerance.
How does the Ready/Busy status function on the DO pin of the 93C76AT-I/OT?
During erase or write cycles, the DO pin of the 93C76AT-I/OT outputs Ready/Busy status: logic low indicates ongoing programming, logic high signals completion. To read status, CS must be brought high for ≥250 ns after TCSL, then DO sampled - as detailed in Sections 2.4–2.9 and Figure 2-1 through 2-7 of DS21796M.
93C76AT-I/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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
93C76AT-I/OT FAQ
1.How can I place an order for 93C76AT-I/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C76AT-I/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-I/OT reliable?
The price and inventory of 93C76AT-I/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-I/OT is usually 5 days.
3.What payment methods are accepted for 93C76AT-I/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C76AT-I/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C76AT-I/OT?
93C76AT-I/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C76AT-I/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-I/OT?
For technical support, including 93C76AT-I/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C76AT-I/OT requirements.
6.How does Aetrix verify that 93C76AT-I/OT is sourced from the original manufacturer or authorized distributors?
All 93C76AT-I/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-I/OT meets industry standards.
7.What is the process for return or replacement of 93C76AT-I/OT?
All 93C76AT-I/OT units undergo pre-shipment inspection (PSI). If there is an issue with 93C76AT-I/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-I/OT part is unused and in its original packaging.
Return procedure for 93C76AT-I/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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