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Microchip Technology 93LC76BT-I/SN
- Part No.:
- 93LC76BT-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC76BT-I/SN.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,101
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Product details
Overview
93LC76BT-I/SN from Microchip Technology Inc. is an 8Kbit, 512 × 16-bit organization serial EEPROM with Microwire-compatible 3-wire interface, operating over 2.5–5.5V supply and rated for industrial temperature (−40°C to +85°C). It features self-timed erase/write cycles, device status signaling (Ready/Busy), and sequential read capability - deployed in embedded system configuration storage, sensor calibration data retention, and power-management parameter backup.
For engineers reviewing the 93LC76BT-I/SN datasheet, 93LC76BT-I/SN pinout, 93LC76BT-I/SN application, or 93LC76BT-I/SN equivalent, key selection considerations include its fixed 16-bit word size (no ORG pin), absence of PE/ORG pins, SOIC-8 package compatibility, and support for WRAL/ERAL bulk operations under ≥4.5V VCC.
Technical Context
This device implements a synchronous serial Microwire interface with CS, CLK, DI, and DO signals. All instructions - READ, WRITE, ERASE, ERAL, WRAL, EWEN, EWDS - are clocked on rising CLK edges, with opcode/address/data latched synchronously. The DO pin serves dual function: data output during READ and Ready/Busy status indicator during programming cycles.
It uses CMOS EEPROM technology with automatic ERAL before WRAL, power-on/off data protection circuitry, and internal voltage detection (VPOR = 1.5V typical). No external logic is required for word-size selection, as the 'B' suffix denotes fixed 16-bit organization - eliminating ORG pin dependency and simplifying PCB layout versus 'C' variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (512 × 16-bit) - supports compact firmware parameter tables without byte-level addressing overhead |
| VCC Range | 2.5 V to 5.5 V - interoperable with 3.3 V and 5 V microcontrollers without level shifting |
| Clock Frequency | Up to 3 MHz at VCC ≥ 4.5 V - enables fast configuration loading in time-critical boot sequences |
| Write Cycle Time | 5 ms max (TWC) - deterministic timing for host software timeout handling during nonvolatile updates |
| Data Retention | >200 years - ensures long-term reliability in unattended industrial deployments |
| Endurance | 1,000,000 erase/write cycles - sufficient for daily recalibration or logging in fielded equipment |
| Interface | 3-wire Microwire (CS/CLK/DI/DO) - minimal GPIO usage; no SPI mode bits or chip-select arbitration logic needed |
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. Exposed pad not present (unlike DFN/TDFN variants).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CS | Chip Select | Active-high enable; must be held low ≥250 ns between commands; deselects device into standby |
| 2 - CLK | Serial Clock | Rising-edge synchronized I/O; clock can pause mid-transfer without state loss |
| 3 - DI | Data Input | Accepts Start bit, opcodes, addresses, and write data; high-impedance when not selected |
| 4 - DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge |
| 5 - VSS | Ground | Reference for all digital and analog functions; must be low-impedance connection |
| 6 - NC | No Connect | Not bonded; left floating or tied to VSS per board design rules - no functional impact |
| 7 - NC | No Connect | Not bonded; same handling as Pin 6 - avoids misinterpretation as ORG/PE |
| 8 - VCC | Power Supply | Supplies core logic and memory array; internal POR triggers at ~1.5 V |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 16-bit organization | Eliminates external ORG pin routing and logic; simplifies layout and reduces BOM count |
| Self-timed erase/write cycles | Removes need for host-controlled timing delays; enables deterministic firmware state management |
| Ready/Busy status via DO pin | Allows polling-based programming flow without dedicated interrupt lines or additional GPIO |
| Sequential read mode | Reduces command overhead when reading contiguous configuration blocks - improves throughput |
| Auto-ERAL before WRAL | Guarantees clean memory state before bulk write; prevents partial-write corruption in power-loss scenarios |
Applications
| Industrial Sensor Calibration Storage | Embedded System Boot Configuration |
|---|---|
Use Scenario: Storing factory-calibrated gain/offset coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed during power-up initialization sequence. Use Value: Enables plug-and-play sensor replacement without manual recalibration; retains values across 200+ year lifespan. | Use Scenario: Holding bootloader configuration flags (e.g., UART baud rate, watchdog enable, secure boot mode) in microcontroller-based HMI panels. IC Role / Device Role / Timing Role: Configuration memory mapped via GPIO bit-banged Microwire interface during cold start. Use Value: Supports field-upgradable settings without reflashing main MCU firmware; survives 1M+ power cycles. |
| Power Management Unit Settings | Medical Device Safety Parameter Backup |
Use Scenario: Saving user-adjusted voltage/current limits and thermal thresholds in AC/DC power supplies with digital control. IC Role / Device Role / Timing Role: Persistent settings store updated via I²C-to-Microwire bridge IC during maintenance mode. Use Value: Maintains safe operating boundaries after unexpected shutdown; immune to brownout-induced corruption. | Use Scenario: Archiving critical safety-critical parameters (e.g., maximum dose limits, alarm thresholds) in portable infusion pumps. IC Role / Device Role / Timing Role: Fail-safe backup memory verified at power-on-reset before therapy delivery begins. Use Value: Meets IEC 62304 Class C requirements for data integrity; >200-year retention exceeds product lifetime. |
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/P | Same 512×16-bit organization, identical timing and instruction set; PDIP-8 package instead of SOIC-8 | Through-hole assembly only; larger footprint; no surface-mount compatibility | Select for legacy through-hole production or prototyping with breadboard-friendly leads |
| AT25128B-MAHL-T | 128 Kbit SPI EEPROM (8K×16), 2.5–5.5 V, but uses 4-wire SPI interface (not Microwire) | Requires SPI master peripheral; incompatible instruction set and clocking protocol | Choose only if migrating to SPI infrastructure; not drop-in replaceable due to interface mismatch |
Compared with 93LC76B-I/P, the 93LC76BT-I/SN offers identical functionality in a space-saving SOIC-8 package ideal for high-density PCBs; versus AT25128B-MAHL-T, it retains Microwire compatibility for legacy 3-wire designs but trades capacity for pinout and protocol continuity.
Availability
93LC76BT-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration storage, embedded system boot configuration, and power management unit settings requiring stable component supply across extended product lifecycles.
Supply support for 93LC76BT-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 components, and nonvolatile memory solutions, headquartered in Chandler, Arizona.
The 93LC76 series belongs to Microchip's legacy Microwire-compatible EEPROM product line, designed specifically for cost-sensitive, low-power embedded systems requiring simple 3-wire configuration storage with guaranteed long-term data integrity.
FAQ
What is the memory organization of the 93LC76BT-I/SN?
The 93LC76BT-I/SN is a fixed 512 × 16-bit (8 Kbit) EEPROM - the 'B' suffix confirms 16-bit word organization without ORG pin dependency. Unlike 'C' variants, it does not support runtime word-size switching, simplifying hardware design and eliminating external ORG pull-up/pull-down requirements. This configuration is optimized for efficient storage of 16-bit configuration registers or calibration words.
Does the 93LC76BT-I/SN have Program Enable (PE) or ORG pins?
No, the 93LC76BT-I/SN does not include PE or ORG pins. As a 'B'-suffix device in the 93LC76 family, it implements fixed 16-bit organization and always enables write functionality - no external PE signal is required or supported. Pins 6 and 7 in the SOIC-8 package are No Connect (NC), confirmed by Microchip's Pin Function Table and Package Types diagram in DS21796M.
What is the maximum clock frequency supported by the 93LC76BT-I/SN?
The 93LC76BT-I/SN supports up to 3 MHz clock frequency when VCC is 4.5 V to 5.5 V, 2 MHz at 2.5 V to 4.5 V, and 1 MHz at 1.8 V to 2.5 V. Since the 93LC76BT-I/SN operates within 2.5–5.5 V, its practical maximum is 3 MHz (at ≥4.5 V) or 2 MHz (at 2.5–4.5 V), as specified in Table 1-2 AC Characteristics. This allows rapid configuration reads in time-constrained boot sequences.
How does the Ready/Busy status work on the 93LC76BT-I/SN?
The 93LC76BT-I/SN asserts Ready/Busy status on the DO pin during erase and write operations: DO = low indicates programming in progress; DO = high means operation complete. To sample status, CS must be brought high for ≥250 ns after TCSL, then DO sampled on CLK rising edges. After completion, issuing a Start bit followed by CS low clears the status flag - a hardware-managed handshake requiring no additional control lines.
Can the 93LC76BT-I/SN perform bulk erase or write operations?
Yes, the 93LC76BT-I/SN supports both Erase All (ERAL) and Write All (WRAL) instructions. ERAL erases the full 512-word array in ≤6 ms (at VCC ≥4.5 V); WRAL writes identical 16-bit data to all locations in ≤15 ms, and automatically executes ERAL first. Both require VCC ≥4.5 V and prior execution of EWEN - enabling robust factory initialization or field recovery without per-address command overhead.
93LC76BT-I/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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
93LC76BT-I/SN FAQ
1.How can I place an order for 93LC76BT-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC76BT-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 93LC76BT-I/SN reliable?
The price and inventory of 93LC76BT-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 93LC76BT-I/SN is usually 5 days.
3.What payment methods are accepted for 93LC76BT-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC76BT-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC76BT-I/SN?
93LC76BT-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC76BT-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 93LC76BT-I/SN?
For technical support, including 93LC76BT-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC76BT-I/SN requirements.
6.How does Aetrix verify that 93LC76BT-I/SN is sourced from the original manufacturer or authorized distributors?
All 93LC76BT-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 93LC76BT-I/SN meets industry standards.
7.What is the process for return or replacement of 93LC76BT-I/SN?
All 93LC76BT-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93LC76BT-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 93LC76BT-I/SN part is unused and in its original packaging.
Return procedure for 93LC76BT-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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