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Microchip Technology 93LC76BT-E/SN
- Part No.:
- 93LC76BT-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC76BT-E/SN.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,073
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Product details
Overview
93LC76BT-E/SN from Microchip Technology is an 8Kbit, low-voltage, serial EEPROM with 512 × 16-bit organization, operating across 2.5–5.5V supply and rated for automotive temperature range (−40°C to +125°C). It features Microwire-compatible 3-wire serial interface (CS/CLK/DI/DO), self-timed erase/write cycles, and device status signaling via DO pin. It is used in automotive body control modules for storing calibration data and configuration parameters.
For engineers reviewing the 93LC76BT-E/SN datasheet, 93LC76BT-E/SN pinout, 93LC76BT-E/SN application, or 93LC76BT-E/SN equivalent, key selection considerations include its automotive-grade temperature rating, 16-bit word organization, PE/ORG pin support for write protection and memory configuration, 5ms program cycle time, and compatibility with legacy Microwire controllers in safety-critical embedded systems.
Technical Context
The 93LC76BT-E/SN implements a synchronous serial Microwire interface with dedicated CS, CLK, DI, and DO lines. Its internal architecture includes address decoder, mode decode logic, and output buffer, supporting both individual and bulk operations (ERAL/WRAL) with automatic ERAL before WRAL. The ORG pin selects x16 organization, and PE must be high to enable programming.
It uses CMOS EEPROM technology with power-on/off data protection circuitry and built-in voltage detection (VPOR = 1.5V typical). All erase/write operations are self-timed and generate Ready/Busy status on DO - low during active programming, high when complete - enabling polling-based firmware coordination without external timing components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (512 × 16-bit organization) |
| VCC range | 2.5 V to 5.5 V - supports wide-input industrial and automotive power rails |
| Temperature grade | Automotive (−40°C to +125°C) - qualified for under-hood and chassis-mounted applications |
| Write endurance | 1,000,000 erase/write cycles - ensures long-term reliability in field-updatable systems |
| Data retention | 200 years at 25°C - guarantees nonvolatile storage integrity over product lifetime |
| Program cycle time | 5 ms (TWC) - defines minimum interval between successive write commands |
| Max clock frequency | 3 MHz at VCC ≥ 4.5 V - sets maximum SPI-like throughput for configuration reads/writes |
Pinout & Package
8-lead SOIC package (SN suffix), Pb-free Matte Tin finish, 150-mil width, standard JEDEC MS-012AC footprint. Pin 1 marked by laser dot; pin 1 is CS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; device enters Standby mode when low; required 250 ns minimum low time between instructions |
| CLK | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcode/address/data; stoppable mid-sequence |
| DI | Data Input | Receives Start bit, instruction opcodes, addresses, and write data; must be stable before first CLK rising edge |
| DO | Data Output / Status | Outputs read data or Ready/Busy status (low = busy, high = ready); tri-stated when CS low or during non-read states |
| VSS | Ground | Reference return path for all digital and analog functions; must be low-impedance |
| ORG | Organization select | Logic high → 16-bit mode; logic low → 8-bit mode; must be externally tied, not floated |
| PE | Program Enable | Logic high required to execute ERASE/WRITE/WRAL; tied low to permanently disable writes |
| VCC | Power supply | 2.5–5.5 V operation; internal POR circuit triggers at ~1.5 V to prevent partial writes during brownout |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write with auto-erase | Eliminates need for external timing circuitry; firmware polls DO pin instead of managing fixed delays |
| Ready/Busy status on DO pin | Enables real-time polling during programming - no interrupt or additional GPIO required |
| Program Enable (PE) pin | Hardware-level write protection independent of software state - prevents corruption during reset or firmware fault |
| Sequential read function | Reduces command overhead: holding CS high automatically increments address for continuous data streaming |
| Power-on/off data protection | Internal circuitry inhibits writes when VCC drops below 1.5 V - prevents data corruption during power ramp-up/down |
Applications
| Automotive Body Control Unit (BCU) | Industrial PLC Configuration Storage |
|---|---|
Use Scenario: Storing seat position presets, mirror angle calibrations, and lighting profiles in vehicle BCU modules. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with guaranteed data integrity across ignition cycles and thermal extremes. Use Value: Automotive temperature rating (−40°C to +125°C) and 200-year data retention ensure settings persist over full vehicle lifetime without refresh. | Use Scenario: Retaining I/O mapping, PID tuning constants, and alarm thresholds in programmable logic controllers. IC Role / Device Role / Timing Role: Serial configuration EEPROM interfaced to microcontroller's GPIO or hardware SPI peripheral. Use Value: 1M endurance cycles support frequent field updates during commissioning and maintenance without wear-out risk. |
| Medical Infusion Pump Calibration | Smart Energy Meter Firmware Parameters |
Use Scenario: Holding flow-rate calibration coefficients and safety limits in battery-powered infusion pumps. IC Role / Device Role / Timing Role: Low-power, tamper-resistant memory for critical operational parameters requiring regulatory traceability. Use Value: PE pin enables hardware-enforced write lock after calibration - prevents unauthorized modification during service. | Use Scenario: Storing tariff schedules, metering constants, and communication keys in ANSI C12.19-compliant smart meters. IC Role / Device Role / Timing Role: Secure, long-life storage for cryptographic keys and billing parameters updated via secure download. Use Value: Microwire interface provides deterministic timing for secure boot verification sequences and avoids SPI protocol ambiguity. |
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 | No PE or ORG pins; fixed 16-bit organization; rated only for Industrial (−40°C to +85°C) | Lacks hardware write protection and automotive qualification; suitable for cost-sensitive non-automotive designs | Select if automotive temp grade and PE-based security are unnecessary and board space allows same SOIC-8 footprint |
| AT25DF041A-SHN-T | 4 Mbit SPI NOR Flash; sector erase; no built-in write-protection pins; requires external command sequencing | Higher density but lacks single-byte write capability and hardware write-disable; requires more complex driver stack | Select only if >8 Kbit capacity is needed and firmware can manage SPI flash command protocol and wear leveling |
Compared with 93LC76B-I/SN, the 93LC76BT-E/SN adds automotive qualification and hardware write-lock via PE; compared with AT25DF041A-SHN-T, it offers simpler Microwire protocol, true byte-write capability, and lower power consumption during configuration access.
Availability
93LC76BT-E/SN is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and medical device design requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for 93LC76BT-E/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 devices, and memory solutions, specializing in embedded control and connectivity products for industrial, automotive, and consumer markets.
The 93LC76 series belongs to Microchip's legacy Microwire-compatible EEPROM product line, designed specifically for reliable, low-pin-count nonvolatile storage in resource-constrained embedded systems with strict qualification requirements.
FAQ
What is the memory organization of the 93LC76BT-E/SN?
The 93LC76BT-E/SN is a 512 × 16-bit EEPROM (8 Kbit total), configured as x16 by default when the ORG pin is tied high. Unlike 'A' versions, it supports configurable word size but is factory-specified for 16-bit operation in this variant. Its instruction set and timing align with x16 addressing per the DS21796M datasheet Table 1-3.
Does the 93LC76BT-E/SN require external pull-up resistors on its I/O lines?
The 93LC76BT-E/SN does not require external pull-ups on CS, CLK, or DI for basic operation, as these are driven actively by the controller. However, a 10 kΩ pull-down on CS is recommended per Microchip's design note to prevent spurious activation during power-up. DO is open-drain capable and may need a pull-up if used in wired-OR configurations.
How is write protection implemented on the 93LC76BT-E/SN?
Write protection on the 93LC76BT-E/SN is implemented via the PE (Program Enable) pin: programming is only allowed when PE is held high. Additionally, the EWDS command disables erase/write until EWEN is issued. Both mechanisms must be satisfied - PE high *and* EWEN enabled - for any ERASE, WRITE, or WRAL operation to execute.
What is the minimum VCC required for reliable operation of the 93LC76BT-E/SN?
The 93LC76BT-E/SN incorporates a power-on reset circuit that inhibits all operations until VCC rises above ~1.5 V (typical VPOR). Below this threshold, the device remains in a high-impedance, write-inhibited state. Reliable functional operation begins at 2.5 V, the specified minimum VCC for the 'LC' family across the automotive temperature range.
Can the 93LC76BT-E/SN be used with standard SPI interfaces?
The 93LC76BT-E/SN uses a Microwire-compatible 3-wire interface (CS/CLK/DI/DO), not standard SPI. While electrically similar, it lacks MOSI/MISO separation and uses a single bidirectional data line with specific start-bit detection and opcode framing. Direct SPI hardware mapping is not supported; bit-banged GPIO or dedicated Microwire peripherals are required for correct protocol compliance.
93LC76BT-E/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
93LC76BT-E/SN FAQ
1.How can I place an order for 93LC76BT-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC76BT-E/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 93LC76BT-E/SN reliable?
The price and inventory of 93LC76BT-E/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC76BT-E/SN is usually 5 days.
3.What payment methods are accepted for 93LC76BT-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC76BT-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC76BT-E/SN?
93LC76BT-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC76BT-E/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 93LC76BT-E/SN?
For technical support, including 93LC76BT-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC76BT-E/SN requirements.
6.How does Aetrix verify that 93LC76BT-E/SN is sourced from the original manufacturer or authorized distributors?
All 93LC76BT-E/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 93LC76BT-E/SN meets industry standards.
7.What is the process for return or replacement of 93LC76BT-E/SN?
All 93LC76BT-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93LC76BT-E/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 93LC76BT-E/SN part is unused and in its original packaging.
Return procedure for 93LC76BT-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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