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Microchip Technology 93LC76BT-I/OT
- Part No.:
- 93LC76BT-I/OT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SOT-23-6
- Datasheet:
-
93LC76BT-I/OT.pdf
- Description:
- IC EEPROM 8KBIT MIC WIRE SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,310
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Product details
Overview
93LC76BT-I/OT from Microchip Technology Inc. is an 8Kbit, low-voltage, serial EEPROM with 512 × 16-bit organization, industrial temperature range (−40°C to +85°C), 2.5–5.5V supply, and SOT-23-6 package. It implements Microwire-compatible 3-wire serial interface (CS/CLK/DI/DO), supports self-timed erase/write cycles, and delivers 1 million endurance cycles with >200 years data retention - used in embedded system configuration storage and sensor calibration memory.
For engineers reviewing the 93LC76BT-I/OT datasheet, 93LC76BT-I/OT pinout, 93LC76BT-I/OT application, or 93LC76BT-I/OT equivalent, key selection considerations include its fixed 16-bit word size (no ORG pin), absence of PE/ORG pins (distinguishing it from 'C' variants), SOT-23-6 footprint constraints, VCC operating range, and Ready/Busy status signaling via DO pin during programming.
Technical Context
This device belongs to the 93LC76B family - a dedicated 16-bit organization variant without ORG or PE pins. It uses synchronous Microwire protocol with rising-edge clocking for opcode, address, and data transfer, and relies on CS-controlled active mode entry and DO-driven Ready/Busy polling during erase/write operations.
Unlike 'C' versions, it lacks hardware write-protection and memory-size configuration logic; all instructions (READ, WRITE, ERASE, EWEN, EWDS, ERAL) are executed using fixed 10-bit addressing and 16-bit data width. Its timing is voltage-dependent: max clock frequency is 3 MHz at VCC ≥ 4.5V, 2 MHz at 2.5V ≤ VCC < 4.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (512 × 16-bit) - fixed word width; no ORG pin required |
| VCC Range | 2.5 V to 5.5 V - supports wide-input industrial power rails |
| Endurance | 1,000,000 erase/write cycles - validated at 25°C, 5.0V; enables long-life field updates |
| Data Retention | >200 years - ensures nonvolatile storage integrity over product lifetime |
| Max Clock Frequency | 3 MHz (at VCC ≥ 4.5V) - defines maximum serial throughput for configuration writes |
| Write Cycle Time | 5 ms (TWC) - self-timed; determines minimum latency between successive write commands |
| Operating Temp | −40°C to +85°C (Industrial grade) - qualified for harsh ambient environments |
Pinout & Package
Package: SOT-23-6, Pb-free Matte Tin finish, 1.6 mm × 2.8 mm footprint, 1.1 mm height - optimized for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | DO (Data Out) | Serial output for read data and Ready/Busy status (low = busy); high-Z when inactive |
| 2 | VSS | Ground reference; must be connected to system GND plane for stable operation |
| 3 | DI (Data In) | Serial input for start bit, opcodes, addresses, and write data; synchronous to CLK rising edge |
| 4 | CLK (Clock) | Master-synchronized serial clock; rising edge clocks all data; stoppable mid-sequence |
| 5 | CS (Chip Select) | Active-high enable; device enters standby when low; TCSL ≥ 250 ns required between commands |
| 6 | VCC | Power supply input; internal POR circuit triggers at ~1.5 V; must remain stable during write cycles |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed Erase/Write | Eliminates external timing control; internal state machine manages auto-erase before write |
| Ready/Busy Status via DO | Enables polling-based firmware flow control without additional status lines or interrupts |
| Power-On/Off Data Protection | Hardware-level inhibition below VCC threshold (~1.5 V) prevents corruption during brown-out |
| Microwire-Compatible Interface | 3-wire serial protocol reduces I/O count vs SPI; compatible with legacy microcontroller peripherals |
| Low Standby Current | 1 µA typical (ICCS) - extends battery life in always-on sensor nodes and portable devices |
Applications
| Industrial Sensor Calibration Storage | Embedded System Configuration Memory |
|---|---|
Use Scenario: Storing factory-trimmed ADC offset/gain coefficients and temperature compensation tables in industrial pressure transmitters. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed at power-up and during field recalibration; 5 ms write latency acceptable due to infrequent updates. Use Value: Enables traceable, field-upgradable calibration without requiring MCU flash reprogramming or external programming fixtures. | Use Scenario: Holding user-defined network settings (IP, subnet, gateway) and UI preferences in smart HVAC controllers. IC Role / Device Role / Timing Role: Serial configuration store interfaced directly to MCU GPIOs; accessed only during boot or menu navigation. Use Value: Provides reliable, low-pin-count storage independent of main MCU's flash endurance limits and erase granularity. |
| Automotive Body Control Module (BCM) Parameter Backup | Medical Device Usage Log Storage |
Use Scenario: Retaining seat position memory, mirror angle presets, and lighting profiles across ignition cycles in automotive BCMs. IC Role / Device Role / Timing Role: Dedicated 16-bit EEPROM accessed via dedicated Microwire peripheral; operates within −40°C to +85°C ambient. Use Value: Meets AEC-Q100 stress requirements for automotive grade; eliminates reliance on MCU internal EEPROM with limited endurance. | Use Scenario: Recording timestamped usage events (e.g., sterilization cycles, battery discharge counts) in portable diagnostic equipment. IC Role / Device Role / Timing Role: Low-power, high-reliability event logger; written once per session with verified 1M-cycle endurance. Use Value: Ensures regulatory-compliant audit trail persistence even after 10+ years of clinical deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC76B-I/SN | SOIC-8 package; same 512×16-bit organization, VCC range, and timing; includes exposed pad not present in SOT-23 | Requires larger PCB area; better thermal dissipation for high-write-frequency use cases | Select when board layout allows SOIC-8 and thermal management is prioritized over footprint size |
| AT25080B-MAU-10 | SPI interface (4-wire), 1 MHz max clock, 8Kbit (1024×8), different instruction set and status reporting mechanism | Requires SPI-capable MCU peripheral; incompatible timing and command structure; no DO-based Ready/Busy polling | Select only if migrating to SPI architecture and redesigning firmware interface layer |
Compared with 93LC76B-I/SN, the 93LC76BT-I/OT saves 60% board area but sacrifices thermal headroom; versus AT25080B-MAU-10, it retains Microwire compatibility and DO-status polling but requires no CS deassertion between bytes - simplifying low-resource MCU implementations.
Availability
93LC76BT-I/OT is available at Aetrix Electronics and suitable for industrial sensor calibration storage, embedded system configuration memory, and medical device usage log storage requiring stable component supply across multi-year production cycles.
Supply support for 93LC76BT-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 93LC76B series is part of Microchip's legacy serial EEPROM portfolio designed for cost-sensitive, space-constrained embedded systems requiring robust nonvolatile storage with minimal I/O overhead and guaranteed endurance.
FAQ
What is the memory organization of the 93LC76BT-I/OT?
The 93LC76BT-I/OT has a fixed 512 × 16-bit organization - meaning it stores 512 words of 16 bits each, totaling 8 Kbit. Unlike 'C' variants, it does not feature an ORG pin; its word size is hardwired and cannot be configured for 8-bit access. This is confirmed in the Device Selection Table and Pin Function Table of DS21796M, where 'B' devices are explicitly designated as 16-bit-only.
Does the 93LC76BT-I/OT support hardware write protection?
No, the 93LC76BT-I/OT does not support hardware write protection. It lacks both the PE (Program Enable) and ORG pins found on 'C' variants. Write protection is implemented solely through firmware - by issuing EWDS after each write and requiring EWEN before subsequent erase/write operations. This behavior is documented in Section 2.6 and the Device Selection Table, which lists PE as "No" for all 'B' devices.
What package type is used for the 93LC76BT-I/OT?
The 93LC76BT-I/OT uses the SOT-23-6 package (designated "OT" in Microchip's packaging nomenclature). This is a 6-pin, surface-mount, Pb-free package measuring 1.6 mm × 2.8 mm, with pin 1 marked by laser. The package type is explicitly listed in the Device Selection Table and confirmed in Section 4.1 and Figure 4-1 of DS21796M.
How is Ready/Busy status monitored on the 93LC76BT-I/OT?
Ready/Busy status is monitored via the DO pin: during erase or write cycles, DO outputs low while programming is active and transitions high upon completion. To sample status, CS must be held high for ≥250 ns after TCSL, then the DO level is read. This mechanism is detailed in Sections 2.4, 2.5, 2.8, and 3.4 of DS21796M and applies identically across all 'A', 'B', and 'C' variants.
What is the maximum clock frequency supported by the 93LC76BT-I/OT at 3.3V VCC?
At VCC = 3.3 V (within 2.5–4.5 V range), the 93LC76BT-I/OT supports a maximum clock frequency of 2 MHz. This is specified in Table 1-2 (A1: FCLK), where the "2.5V ≤ VCC < 4.5V" row defines the upper limit as 2 MHz. Exceeding this may cause command misreads or failed writes due to setup/hold timing violations.
93LC76BT-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:
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
93LC76BT-I/OT FAQ
1.How can I place an order for 93LC76BT-I/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC76BT-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 93LC76BT-I/OT reliable?
The price and inventory of 93LC76BT-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 93LC76BT-I/OT is usually 5 days.
3.What payment methods are accepted for 93LC76BT-I/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC76BT-I/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC76BT-I/OT?
93LC76BT-I/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC76BT-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 93LC76BT-I/OT?
For technical support, including 93LC76BT-I/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC76BT-I/OT requirements.
6.How does Aetrix verify that 93LC76BT-I/OT is sourced from the original manufacturer or authorized distributors?
All 93LC76BT-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 93LC76BT-I/OT meets industry standards.
7.What is the process for return or replacement of 93LC76BT-I/OT?
All 93LC76BT-I/OT units undergo pre-shipment inspection (PSI). If there is an issue with 93LC76BT-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 93LC76BT-I/OT part is unused and in its original packaging.
Return procedure for 93LC76BT-I/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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