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Microchip Technology 93C76BT-I/OT
- Part No.:
- 93C76BT-I/OT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SOT-23-6
- Datasheet:
-
93C76BT-I/OT.pdf
- Description:
- IC EEPROM 8KBIT MIC WIRE SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,512
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Product details
Overview
93C76BT-I/OT from Microchip Technology is an 8Kbit, 4.5–5.5V serial EEPROM with 1024 × 8-bit organization, Microwire-compatible 3-wire interface (CS/CLK/DI/DO), and industrial temperature range (–40°C to +85°C). It features self-timed erase/write cycles, 1M endurance, >200-year data retention, and power-on/off data protection - used in embedded system configuration storage, sensor calibration memory, and firmware parameter backup.
For engineers reviewing the 93C76BT-I/OT datasheet, 93C76BT-I/OT pinout, 93C76BT-I/OT application, or 93C76BT-I/OT equivalent, key selection considerations include its fixed 8-bit word size (no ORG pin), absence of PE/ORG pins, SOT-23-6 package constraints, VCC-dependent timing (max 3 MHz at 4.5–5.5V), and compatibility with legacy Microwire controllers requiring CS-active-high, rising-edge clocking, and Ready/Busy polling via DO.
Technical Context
This device implements a synchronous serial Microwire protocol with Start-bit detection, opcode-driven instruction set (READ/ERASE/WRITE/ERAL/EWEN/EWDS), and status reporting via DO pin during programming. It uses internal auto-erase before write and supports sequential read when CS remains high.
Unlike 'C' variants, the 93C76B and 93C76T subtypes lack ORG and PE pins - confirming fixed 8-bit organization and always-enabled programming. Its SOT-23-6 footprint (pinout: DO/VSS/DI/VCC/CS/CLK) mandates careful PCB layout for signal integrity on DI/DO lines and stable VCC decoupling near pin 4.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1024 × 8-bit) - provides 1 KB of nonvolatile user storage for configuration registers or calibration tables. |
| VCC Range | 4.5 V to 5.5 V - requires regulated 5V supply; not compatible with 3.3V or wide-voltage systems without level shifting. |
| Clock Frequency | Up to 3 MHz - enables fast writes (~2 ms per byte) but demands clean CLK edges and controlled trace impedance. |
| Endurance | 1,000,000 erase/write cycles - suitable for field-updatable parameters updated daily over 27 years. |
| Data Retention | Greater than 200 years at 25°C - ensures long-term reliability in unpowered storage applications. |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - interoperable with legacy microcontrollers lacking SPI hardware but supporting bit-banged Microwire. |
| Temperature Range | –40°C to +85°C (Industrial grade) - validated for use in automotive ECUs, industrial HMIs, and outdoor metering equipment. |
Pinout & Package
Package: SOT-23-6 (6-lead small-outline transistor package), Pb-free matte tin finish, body dimensions 2.9 mm × 1.6 mm × 1.1 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DO) | Data Output / Ready-Busy Indicator | Tri-state output delivering read data or logic-low during erase/write; must be pulled up externally for proper status polling. |
| 2 (VSS) | Ground Reference | Primary return path for all internal circuitry; requires low-inductance connection to system ground plane. |
| 3 (DI) | Data Input | Accepts Start bit, opcodes, addresses, and write data on CLK rising edge; shares no internal bus with DO. |
| 4 (VCC) | Power Supply | 4.5–5.5V input; requires local 0.1 µF ceramic decoupling capacitor placed within 2 mm of pin. |
| 5 (CS) | Chip Select | Active-high enable; must remain low ≥250 ns between instructions to reset internal state and avoid spurious commands. |
| 6 (CLK) | Serial Clock Input | Rising-edge synchronized timing source; tolerant of halted clocks mid-transfer but requires min TCKH/TCKL per VCC. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write cycles | Eliminates need for external timing control - WRAL completes in 15 ms, ERAL in 6 ms, WRITE in 2 ms, enabling deterministic firmware flow. |
| Power-on/off data protection | Hardware lockout below 3.8 V VCC prevents corruption during brown-out or hot-plug events without software intervention. |
| Ready/Busy status via DO pin | Enables efficient polling instead of fixed delays - reduces average write latency by up to 70% in interrupt-driven systems. |
| Sequential read mode | Allows reading full 1024-byte array with single CS assertion and 22 × 1024 clocks - cuts I/O overhead vs. random-access reads. |
| 100% tested AC/DC parameters | Guarantees timing compliance across full industrial temperature range - avoids marginal operation in thermally stressed environments. |
Applications
| Industrial Sensor Calibration | Automotive Body Control Module |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed infrequently during commissioning or recalibration; operates at 100 kHz clock during setup. Use Value: Eliminates manual potentiometer adjustment and enables digital calibration traceability across production batches. |
Use Scenario: Holding seat position memory, mirror angle presets, and lighting configuration in 12V automotive body domain controllers. IC Role / Device Role / Timing Role: Low-power parameter store powered directly from vehicle battery via LDO; withstands load-dump transients due to VCC lockout. Use Value: Survives ignition cycling and maintains user preferences without supercapacitor backup or FRAM cost premium. |
| Medical Device Configuration | Smart Energy Meter Firmware Patch |
Use Scenario: Retaining regulatory-compliant operational limits (e.g., max infusion rate, alarm thresholds) in portable infusion pumps. IC Role / Device Role / Timing Role: Secure settings storage isolated from main MCU flash; accessed only during service mode via authenticated command sequence. Use Value: Meets IEC 62304 SW safety requirements by separating critical configuration from executable code space. |
Use Scenario: Storing field-deployed firmware patch metadata (version, CRC, activation timestamp) in utility-grade electricity meters. IC Role / Device Role / Timing Role: Write-once patch tracking memory; erased and rewritten only during OTA update validation phase. Use Value: Prevents partial or corrupted updates by validating patch integrity before committing to main flash, leveraging 1M-cycle endurance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC76BT-I/OT | Wider VCC range (2.5–5.5 V); same 8-bit organization, SOT-23-6 package, and pinout. | Supports 3.3V systems without level shifters; lower VCC threshold enables direct connection to mixed-voltage MCUs. | Select when migrating to 3.3V platforms or requiring brown-out tolerance down to 2.5V. |
| AT25080B-MAU-10UQ-1250 | SPI interface (4-wire), 8Kbit, SOIC-8 package; 1.8–5.5 V operation; 20 MHz max clock. | Requires different firmware driver (SPI vs. Microwire); larger footprint but higher throughput and better noise immunity. | Select when upgrading communication speed or consolidating to SPI-peripheral MCU families. |
Compared with 93LC76BT-I/OT, the 93C76BT-I/OT offers tighter VCC regulation assurance above 4.5V but sacrifices 3.3V compatibility; versus AT25080B, it retains legacy Microwire support and smaller SOT-23 footprint at the cost of bandwidth and package standardization.
Availability
93C76BT-I/OT is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, and medical device configuration requiring stable component supply across extended lifecycle programs.
Supply support for 93C76BT-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 microcontroller, analog, FPGA, and memory solutions, serving industrial, automotive, and consumer markets with high-reliability semiconductor products.
The 93Cxx EEPROM family was designed for cost-sensitive, low-pin-count embedded systems needing robust nonvolatile storage with minimal external components and proven Microwire compatibility.
FAQ
What is the memory organization of the 93C76BT-I/OT?
The 93C76BT-I/OT has a fixed 1024 × 8-bit (8 Kbit) organization. Unlike 'C'-suffix variants, it lacks an ORG pin and therefore does not support 16-bit word mode. This makes it functionally identical to the 93C76A variant - optimized for byte-oriented access in legacy Microwire systems where address space efficiency is prioritized over word alignment.
Does the 93C76BT-I/OT have a Program Enable (PE) pin?
No, the 93C76BT-I/OT does not include a PE pin. As confirmed in the Device Selection Table and Pin Function Table, PE is exclusive to 'C'-suffix parts (e.g., 93C76C). The 93C76BT-I/OT is a 'B'-type variant - meaning programming is always enabled, and write protection must be implemented externally via firmware command sequencing (EWEN/EWDS) or system-level access control.
What package type is used for the 93C76BT-I/OT?
The 93C76BT-I/OT uses the SOT-23-6 package (designated 'OT' in Microchip's packaging code), with pin 1 = DO, pin 2 = VSS, pin 3 = DI, pin 4 = VCC, pin 5 = CS, and pin 6 = CLK. This 6-lead surface-mount package measures 2.9 mm × 1.6 mm and supports reflow soldering per JEDEC J-STD-020.
Can the 93C76BT-I/OT operate at 3.3V?
No, the 93C76BT-I/OT is specified only for 4.5–5.5V operation. Attempting to power it at 3.3V will result in undefined behavior, failed writes, or inability to enter programming mode. For 3.3V systems, consider the pin-compatible 93LC76BT-I/OT (2.5–5.5V) or redesign with level-shifting circuitry - though the latter adds complexity and timing risk.
How is Ready/Busy status monitored on the 93C76BT-I/OT?
Ready/Busy status is reported on the DO pin: logic low indicates ongoing erase/write activity; logic high signals completion. To sample status, assert CS high after ≥250 ns low time (TCSL), then clock one or more dummy cycles - DO will reflect status on the first rising CLK edge. Status clears automatically after CS goes low post-operation.
93C76BT-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:
- 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
93C76BT-I/OT FAQ
1.How can I place an order for 93C76BT-I/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C76BT-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 93C76BT-I/OT reliable?
The price and inventory of 93C76BT-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 93C76BT-I/OT is usually 5 days.
3.What payment methods are accepted for 93C76BT-I/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C76BT-I/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C76BT-I/OT?
93C76BT-I/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C76BT-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 93C76BT-I/OT?
For technical support, including 93C76BT-I/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C76BT-I/OT requirements.
6.How does Aetrix verify that 93C76BT-I/OT is sourced from the original manufacturer or authorized distributors?
All 93C76BT-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 93C76BT-I/OT meets industry standards.
7.What is the process for return or replacement of 93C76BT-I/OT?
All 93C76BT-I/OT units undergo pre-shipment inspection (PSI). If there is an issue with 93C76BT-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 93C76BT-I/OT part is unused and in its original packaging.
Return procedure for 93C76BT-I/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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