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Microchip Technology 93LC76B-I/SN
- Part No.:
- 93LC76B-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC76B-I/SN.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,744
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Product details
Overview
93LC76B-I/SN from Microchip Technology Inc. is a 8Kbit, 512 × 16-bit organization serial EEPROM with Microwire-compatible 3-wire interface, operating from 2.5V to 5.5V across industrial temperature range (–40°C to +85°C), used for nonvolatile parameter storage in embedded controllers and sensor calibration modules.
For engineers reviewing the 93LC76B-I/SN datasheet, 93LC76B-I/SN pinout, 93LC76B-I/SN application, or 93LC76B-I/SN equivalent, key selection criteria include guaranteed 1M erase/write cycles, 200+ year data retention, self-timed write/erase, Ready/Busy status signaling via DO, and SOIC-8 package compatibility with legacy PCB layouts.
Technical Context
This device implements a synchronous serial Microwire interface with CS, CLK, DI, and DO pins-no ORG or PE pins (unlike 'C' variants). It uses dedicated 16-bit word organization, eliminating external configuration logic. All instructions (READ, WRITE, ERASE, EWEN/EWDS) are clocked on rising CLK edges with strict timing windows defined per VCC level.
Internal power-on reset and voltage-detect circuitry (VPOR = 1.5V typ.) ensure data integrity during brown-out conditions. The DO pin serves dual function: serial data output during READ and Ready/Busy status indicator during programming-requiring CS reassertion after TCSL ≥250 ns to sample status.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (512 × 16-bit), fixed x16 organization-no ORG pin required, simplifies layout vs. configurable variants. |
| VCC Range | 2.5V to 5.5V-supports direct connection to 3.3V or 5V microcontroller I/O rails without level-shifting. |
| Endurance | 1,000,000 erase/write cycles-enables frequent field calibration updates in industrial sensors. |
| Data Retention | 200+ years at 25°C-guarantees long-term storage of factory-trimmed coefficients without refresh. |
| Write Cycle Time | 5 ms max (TWC)-self-timed; no external delay needed, reducing firmware overhead. |
| Interface Protocol | Microwire-compatible 3-wire serial (CS/CLK/DI/DO)-interoperable with legacy PIC® MCU peripherals and minimal GPIO usage. |
| Operating Temp | –40°C to +85°C (Industrial grade)-qualified for use in motor control, HVAC, and metering applications. |
Pinout & Package
8-lead SOIC (SN) package with standard 150-mil body width and 1.27 mm pitch. Pin 1 marked by laser dot; pin 1 is CS. No ORG or PE pins present-consistent with 'B' variant designation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-high enable; must be held low ≥250 ns between commands (TCSL) to reset internal state. |
| 2 (CLK) | Serial Clock | Rising-edge synchronized; supports up to 3 MHz at VCC ≥4.5V-enables fast bulk reads in <100 µs. |
| 3 (DI) | Data Input | Accepts Start bit, opcodes (e.g., 01b for WRITE), 9-bit address, and 16-bit data-no pull-up required. |
| 4 (DO) | Data Output / Status | Tri-state output; delivers read data or indicates Busy (low) / Ready (high) during programming-requires CS reassertion to sample. |
| 5 (VSS) | Ground | Reference for all I/O and internal logic; must be connected before VCC to prevent latch-up. |
| 6 (NC) | No Connect | Not bonded internally-leave unconnected; not used for ORG or PE ('B' variant has no configuration pins). |
| 7 (NC) | No Connect | Not bonded internally-leave unconnected; distinguishes 'B' from 'C' variants which use these pins. |
| 8 (VCC) | Power Supply | 2.5–5.5V supply; internal POR activates below 1.5V-prevents spurious writes during power ramp. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed Erase/Write | Eliminates need for external timing loops or watchdog resets-firmware simply polls DO for Ready/Busy. |
| Ready/Busy Status on DO | Enables real-time progress monitoring without additional GPIO or interrupt lines-reduces system resource load. |
| Sequential Read Mode | Allows continuous 16-bit word streaming while CS remains high-cuts read time for multi-word configurations by >40%. |
| Low Standby Current | 1 µA max (ICCS)-critical for battery-powered devices such as portable medical instruments or wireless sensors. |
| Pb-free & RoHS Compliant | Matte tin finish on SOIC leads-meets global environmental compliance without solderability trade-offs. |
Applications
| Motor Control Calibration | Smart Sensor Configuration |
|---|---|
Use Scenario: Storing motor winding resistance compensation values and PID tuning parameters in industrial servo drives. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed during boot and runtime recalibration-retains values across power cycles. Use Value: Enables field-upgradable calibration without firmware reflashing; 1M endurance supports >10 years of daily recalibration. | Use Scenario: Holding factory-trimmed offset/gain coefficients and linearization tables for MEMS pressure sensors. IC Role / Device Role / Timing Role: Dedicated x16 memory mapped to sensor driver's 16-bit register interface-minimizes SPI transaction count. Use Value: Eliminates need for external level shifters or glue logic; 200-year retention ensures lifetime accuracy without maintenance. |
| Energy Meter Firmware Patch | Industrial PLC Configuration |
Use Scenario: Storing small firmware patches or tariff schedule updates in utility-grade electricity meters. IC Role / Device Role / Timing Role: Secure, low-power update storage accessed only during meter boot-isolated from main application flash. Use Value: Allows remote firmware correction without full flash reprogramming; 5 ms write time enables sub-second patch application. | Use Scenario: Saving user-defined I/O mapping, scan cycle timing, and alarm thresholds in modular PLC backplanes. IC Role / Device Role / Timing Role: System-level configuration vault-read at startup and updated via HMI or diagnostic port. Use Value: Decouples hardware design from software configuration; supports drop-in replacement across PLC generations using same SOIC footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC76A-I/SN | 8-bit organization (1024 × 8), identical VCC range, timing, and package-no ORG/PE pins. | Requires two 8-bit transfers per 16-bit value; increases firmware complexity and transaction time. | Select when legacy 8-bit MCU interfaces or existing 8-bit data structures dominate the design. |
| AT25080B-MAU-10 | SPI interface (4-wire), 8Kbit (1024 × 8), 2.5–5.5V, SOIC-8-no Ready/Busy pin; relies on WIP flag polling. | Lacks DO-based status signaling; requires additional clock cycles to poll status register-adds latency. | Select when migrating to SPI-standard peripherals or when leveraging Atmel's enhanced write-protection features. |
Compared with 93LC76A-I/SN, the 93LC76B-I/SN reduces instruction count for 16-bit data handling; versus AT25080B-MAU-10, it offers deterministic status feedback without register reads-critical for time-constrained embedded boot sequences.
Availability
93LC76B-I/SN is available at Aetrix Electronics and suitable for motor control calibration, smart sensor configuration, and industrial PLC configuration requiring stable component supply across extended product lifecycles.
Supply support for 93LC76B-I/SN 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, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93LCxx family was designed specifically for cost-sensitive, low-power nonvolatile storage in resource-constrained embedded systems-emphasizing simplicity, reliability, and broad voltage compatibility.
FAQ
What is the memory organization of the 93LC76B-I/SN?
The 93LC76B-I/SN has a fixed 512 × 16-bit (8Kbit) organization. Unlike 'C' variants, it lacks an ORG pin-so no external logic is needed to select word size. This simplifies PCB layout and firmware, as each instruction accesses one full 16-bit word directly.
Does the 93LC76B-I/SN support Ready/Busy status indication?
Yes, the 93LC76B-I/SN provides Ready/Busy status on the DO pin. After initiating an ERASE or WRITE command, asserting CS high for ≥250 ns (TCSL) allows sampling DO: low = busy, high = ready. This eliminates need for fixed delays or timer-based polling in firmware.
What is the maximum clock frequency supported by the 93LC76B-I/SN?
The 93LC76B-I/SN supports up to 3 MHz clock frequency when VCC is 4.5V–5.5V, 2 MHz at 2.5V–4.5V, and 1 MHz at 1.8V–2.5V. Since this part is rated for 2.5–5.5V, its operational max is 3 MHz-enabling fast sequential reads of multiple 16-bit words.
Is the 93LC76B-I/SN compatible with 3.3V microcontrollers?
Yes, the 93LC76B-I/SN operates from 2.5V to 5.5V and meets VIH/VIL thresholds for 3.3V logic: VIH ≥ 2.0V (VCC ≥ 2.7V), VIL ≤ 0.8V. Its 3.3V-compatible inputs and outputs allow direct interfacing with modern ARM Cortex-M or PIC32 MCUs without level shifters.
What packaging options are available for the 93LC76B-I/SN?
The 93LC76B-I/SN is supplied in 8-lead SOIC (SN) package per Microchip's DS21796M datasheet. Other packages like PDIP (P), TSSOP (ST), MSOP (MS), and DFN (MC/MN) are offered for other variants-but 'SN' specifically denotes the 150-mil SOIC variant with matte tin finish.
93LC76B-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not 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:
- 8-SOIC
93LC76B-I/SN FAQ
1.How can I place an order for 93LC76B-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC76B-I/SN 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 93LC76B-I/SN reliable?
The price and inventory of 93LC76B-I/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC76B-I/SN is usually 5 days.
3.What payment methods are accepted for 93LC76B-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC76B-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC76B-I/SN?
93LC76B-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC76B-I/SN 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 93LC76B-I/SN?
For technical support, including 93LC76B-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC76B-I/SN requirements.
6.How does Aetrix verify that 93LC76B-I/SN is sourced from the original manufacturer or authorized distributors?
All 93LC76B-I/SN 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 93LC76B-I/SN meets industry standards.
7.What is the process for return or replacement of 93LC76B-I/SN?
All 93LC76B-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93LC76B-I/SN, 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 93LC76B-I/SN part is unused and in its original packaging.
Return procedure for 93LC76B-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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