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Microchip Technology 93LC76B-I/MS
- Part No.:
- 93LC76B-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
93LC76B-I/MS.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,763
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Product details
Overview
93LC76B-I/MS from Microchip Technology Inc. is a 8Kbit, 512 × 16-bit serial EEPROM with Microwire-compatible 3-wire interface, operating from 2.5V to 5.5V across -40°C to +85°C industrial temperature range. It features self-timed erase/write cycles, 1,000,000 endurance cycles, >200 years data retention, and integrated power-on/off data protection. Used in embedded system configuration storage for industrial controllers and sensor calibration.
For engineers reviewing the 93LC76B-I/MS datasheet, 93LC76B-I/MS pinout, 93LC76B-I/MS application, or 93LC76B-I/MS equivalent, key selection considerations include its fixed 16-bit organization (no ORG pin), MSOP-8 package footprint, 3 MHz max clock frequency at VCC ≥ 4.5V, and absence of PE/ORG pins-distinguishing it from C-variant devices.
Technical Context
The 93LC76B-I/MS implements a synchronous serial Microwire interface with CS, CLK, DI, and DO signals. It executes READ, WRITE, ERASE, ERAL, EWEN, and EWDS instructions via rising-edge clocked bit streams, with Ready/Busy status reported on DO during programming.
Its architecture uses internal address counters and auto-erase-before-write logic, requiring no external timing control. The device powers up in EWDS mode and requires explicit EWEN before any write operation-ensuring robust data integrity in noise-prone environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (512 × 16-bit) - fixed x16 organization; no ORG pin required |
| VCC range | 2.5V to 5.5V - supports wide-input industrial rails without level-shifting |
| Endurance | 1,000,000 erase/write cycles - enables frequent firmware parameter updates |
| Data retention | >200 years at 25°C - ensures long-term calibration data integrity |
| Max clock frequency | 3 MHz at VCC ≥ 4.5V - enables fast configuration reads in real-time systems |
| Operating temperature | -40°C to +85°C - qualified for industrial control cabinet deployment |
| Interface | Microwire 3-wire serial (CS/CLK/DI/DO) - minimal GPIO usage on host MCU |
Pinout & Package
8-lead MSOP (150 mil) package with exposed pad (optional VSS connection). Pinout validated per DS21796M-page 10 Pin Function Table and Figure on page 23.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions to reset internal logic |
| CLK | Serial Clock | Rising-edge synchronized I/O; clock can pause mid-transfer without state loss |
| DI | Data Input | Accepts Start bit, opcodes, addresses, and write data; no pull-up required |
| DO | Data Output / Status | Tri-state output; delivers read data or Ready/Busy (low = busy) during programming |
| VSS | Ground | Reference for all I/O and internal circuitry; connects to exposed pad in MSOP |
| VCC | Power Supply | 2.5–5.5V supply; includes internal POR detection at ~1.5V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control; TWC = 5 ms typical for full cycle |
| Power-on/off data protection | Hardware-level VCC monitoring prevents writes below 1.5V, avoiding corruption |
| Sequential read mode | Enables continuous register access with single CS assertion-reduces bus overhead |
| Ready/Busy polling via DO | Allows non-blocking host firmware design without fixed delay loops |
| Pb-free RoHS compliance | Matte tin finish on MSOP-8 package meets global environmental requirements |
Applications
| Industrial PLC Configuration Storage | Automotive Sensor Calibration Memory |
|---|---|
Use Scenario: Storing I/O mapping, scaling factors, and alarm thresholds in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during boot and runtime via SPI-compatible Microwire interface. Use Value: Enables field-upgradable settings without firmware reflash; 1M endurance supports daily commissioning cycles over 10+ years. | Use Scenario: Retaining factory-calibrated offset/gain coefficients for temperature and pressure sensors in engine control units. IC Role / Device Role / Timing Role: Standalone serial EEPROM interfaced to MCU ADC subsystem for post-conversion correction. Use Value: >200-year data retention ensures calibration validity across vehicle lifetime; -40°C to +85°C rating matches under-hood thermal profile. |
| Medical Device Parameter Backup | Smart Meter Firmware Settings |
Use Scenario: Preserving user-adjustable therapy parameters and usage logs in portable infusion pumps. IC Role / Device Role / Timing Role: Low-power serial memory accessed intermittently during battery-operated operation. Use Value: 1 µA standby current (ICCS) extends battery life; 2.5V minimum VCC allows direct connection to Li-ion cell voltage. | Use Scenario: Storing tariff schedules, communication keys, and metering history in ANSI C12.19-compliant utility meters. IC Role / Device Role / Timing Role: Secure configuration store isolated from main application processor via dedicated Microwire bus. Use Value: Hardware write-protection via EWEN/EWDS commands prevents unauthorized tampering; RoHS compliance meets global utility procurement mandates. |
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/MS | 512 × 8-bit organization; same VCC/temp range, but outputs 8-bit words per READ | Requires host software adaptation for byte-aligned data structures instead of 16-bit words | Select when legacy 8-bit firmware or memory-mapped byte access is required |
| AT25DF041A-MAU-T | SPI interface (4-wire), 4 Mbit density, sector erase, 50 MHz clock - not Microwire-compatible | Higher throughput and density, but incompatible instruction set and timing model | Choose only if migrating to SPI-based architecture with larger storage needs |
Compared with 93LC76A-I/MS, the 93LC76B-I/MS provides double word width per access-reducing transaction count for 16-bit data-while AT25DF041A-MAU-T offers higher speed and density at the cost of interface compatibility and increased pin count.
Availability
93LC76B-I/MS is available at Aetrix Electronics and suitable for industrial PLC configuration storage, automotive sensor calibration memory, and medical device parameter backup requiring stable component supply across extended product lifecycles.
Supply support for 93LC76B-I/MS 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.
The 93LCxx family was designed specifically for low-power, nonvolatile serial configuration storage in space-constrained embedded systems-emphasizing reliability, wide VCC tolerance, and Microwire interoperability.
FAQ
What is the memory organization of the 93LC76B-I/MS?
The 93LC76B-I/MS has a fixed 512 × 16-bit organization (8 Kbit total), with no ORG pin-unlike the C-variant. Each READ or WRITE operation transfers 16 bits, making it ideal for storing 16-bit configuration registers or calibration words without software bit-packing.
Does the 93LC76B-I/MS require an external pull-up resistor on the DO line?
No. The 93LC76B-I/MS DO pin is actively driven high or low during READ or Ready/Busy status reporting, and enters High-Z when inactive. External pull-ups are unnecessary and may interfere with valid low-level signaling during busy states.
How does write protection work on the 93LC76B-I/MS?
The 93LC76B-I/MS uses command-based write protection: it powers up in EWDS (Erase/Write Disable) mode. An EWEN instruction must precede any ERASE or WRITE command, and EWDS should follow to re-lock the array-preventing accidental overwrites during noise events or brown-out conditions.
Can the 93LC76B-I/MS operate at 1.8V?
No. The 93LC76B-I/MS specifies a minimum VCC of 2.5V (per Device Selection Table, DS21796M-page 1). For 1.8V operation, consider the 93AA76B-I/MS variant, which supports 1.8–5.5V and shares identical pinout and instruction set.
What is the maximum clock frequency supported by the 93LC76B-I/MS at 3.3V?
At VCC = 3.3V (within 2.5–4.5V range), the 93LC76B-I/MS supports a maximum clock frequency of 2 MHz (per TABLE 1-2, A1). Exceeding this violates AC timing specs and may cause opcode misreads or incomplete write cycles.
93LC76B-I/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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-MSOP
93LC76B-I/MS FAQ
1.How can I place an order for 93LC76B-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC76B-I/MS 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/MS reliable?
The price and inventory of 93LC76B-I/MS 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/MS is usually 5 days.
3.What payment methods are accepted for 93LC76B-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC76B-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC76B-I/MS?
93LC76B-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC76B-I/MS 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/MS?
For technical support, including 93LC76B-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC76B-I/MS requirements.
6.How does Aetrix verify that 93LC76B-I/MS is sourced from the original manufacturer or authorized distributors?
All 93LC76B-I/MS 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/MS meets industry standards.
7.What is the process for return or replacement of 93LC76B-I/MS?
All 93LC76B-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 93LC76B-I/MS, 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/MS part is unused and in its original packaging.
Return procedure for 93LC76B-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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