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Microchip Technology 93LC46X-I/SN
- Part No.:
- 93LC46X-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC46X-I/SN.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,710
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Product details
Overview
93LC46X-I/SN from Microchip Technology Inc. is a 1K-bit Microwire-compatible serial EEPROM with configurable x8/x16 organization via the ORG pin, operating from 2.5V to 5.5V, featuring 1,000,000 erase/write cycles and >200-year data retention. It delivers 100 µA typical active read current at 2.5V and supports industrial temperature range (–40°C to +85°C) in an 8-lead rotated SOIC package - used for nonvolatile parameter storage in embedded control systems.
For engineers reviewing the 93LC46X-I/SN datasheet, 93LC46X-I/SN pinout, 93LC46X-I/SN application, or 93LC46X-I/SN equivalent, key selection considerations include its 3-wire serial interface timing (max 2 MHz at VCC < 4.5V), self-timed erase/write cycles (4 ms typical per word), ORG-pin-selectable memory mapping, and power-on/off data protection circuitry.
Technical Context
The 93LC46X-I/SN implements a synchronous 3-wire Microwire interface (CS/CLK/DI/DO) with start-bit detection and opcode-driven command execution. Its internal logic includes address decoding, data register buffering, and status feedback via DO pin during erase/write operations.
Memory organization is dynamically selected by the ORG pin: high = 64 × 16-bit, low = 128 × 8-bit. All programming operations require prior EWEN instruction and automatic ERAL before WRAL, with device status signaled as Ready (DO = high) or Busy (DO = low) after CS reassertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Kbit (128 × 8 or 64 × 16 configuration) |
| Supply Voltage Range | 2.5V to 5.5V - enables direct interfacing with 3.3V and 5V microcontrollers without level shifting |
| Interface Protocol | Microwire-compatible 3-wire serial (CS, CLK, DI, DO) - ensures interoperability with legacy MCU peripherals |
| Erase/Write Endurance | 1,000,000 cycles - supports frequent calibration or configuration updates in field-deployed equipment |
| Data Retention | >200 years at 25°C - guarantees long-term reliability in unattended or maintenance-free applications |
| Operating Temperature | –40°C to +85°C (Industrial grade) - validated for use in automotive body electronics and industrial PLC modules |
| Active Read Current | 100 µA typical at 2.5V - minimizes system power budget in battery-backed or energy-harvesting designs |
Pinout & Package
93LC46X-I/SN uses an 8-lead rotated SOIC package (JEDEC MS-012, 150 mil width), distinct from standard SOIC pinout - pin 1 is CS, pin 2 is CLK, pin 3 is DI, pin 4 is DO, pin 5 is VSS, pin 6 is ORG, pin 7 is NU (not utilized), and pin 8 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select | Active-high enable signal; must be held low ≥250 ns between instructions to reset internal state |
| CLK (Pin 2) | Serial Clock | Synchronizes all data transfers on rising edge; clock can be paused mid-sequence without error |
| DI (Pin 3) | Data Input | Receives start bit, opcode, address, and write data; supports shared bus with DO only below 1 MHz |
| DO (Pin 4) | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); requires pull-up for reliable status polling |
| VSS (Pin 5) | Ground | Reference return path for all digital and analog functions; must be low-impedance |
| ORG (Pin 6) | Organization Select | Connect to VCC for 64×16 mode or VSS for 128×8 mode; floating allowed only ≤1 MHz in x16 mode |
| NU (Pin 7) | No Connect | Internally unconnected; must remain unconnected on PCB to avoid noise coupling |
| VCC (Pin 8) | Power Supply | Accepts 2.5–5.5V; internal power-on reset inhibits programming until VCC > 1.4V |
Key Features
| Feature | Design Value |
|---|---|
| ORG-pin-selectable memory map | Enables hardware-configurable data width (8-bit or 16-bit) without firmware changes |
| Self-timed erase/write cycles | Eliminates need for external timing control - reduces MCU overhead and simplifies driver code |
| Power-on/off data protection | Hardware-enforced lockout below 1.4V prevents corruption during brown-out or hot-swap events |
| Sequential read capability | Allows continuous burst reads across multiple addresses with single CS assertion - improves throughput |
| Status signaling via DO pin | Enables polling-based programming flow without dedicated interrupt lines or additional GPIO |
| Industry-standard Microwire interface | Ensures drop-in compatibility with existing 3-wire EEPROM drivers in legacy MCU toolchains |
Applications
| Industrial Sensor Calibration | Consumer Remote Control ID Storage |
|---|---|
Use Scenario: Storing factory-calibrated sensor coefficients and linearization tables in pressure or temperature transmitters. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with infrequent writes and frequent reads; accessed via MCU's Microwire peripheral during boot or recalibration. Use Value: Enables field-replaceable sensors with unique calibration profiles while maintaining traceability and eliminating manual setup. |
Use Scenario: Holding unique pairing IDs and button mapping configurations in IR remote controls for smart home devices. IC Role / Device Role / Timing Role: Low-power configuration memory updated once per device lifetime; read at power-up to initialize RF transmission parameters. Use Value: Supports mass customization and over-the-air update rollback without requiring larger flash or external programming infrastructure. |
| Automotive Body Control Module | Medical Infusion Pump Settings |
Use Scenario: Saving user preferences (e.g., mirror position, seat memory) and fault logs in vehicle body control units. IC Role / Device Role / Timing Role: Industrial-grade EEPROM interfaced to 8-bit or 16-bit automotive MCUs; withstands vibration and thermal cycling. Use Value: Meets AEC-Q100 stress requirements indirectly via industrial temp rating and 200-year retention - avoids costly qualification of newer parts. |
Use Scenario: Storing drug library parameters, dosage limits, and operator audit trails in Class II medical infusion pumps. IC Role / Device Role / Timing Role: Safety-critical configuration store accessed under IEC 62304-controlled firmware; write-protected via EWDS after initialization. Use Value: Provides deterministic, verifiable nonvolatile storage with documented endurance and retention - satisfies FDA design history file requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC46C-I/SN | Pin-compatible successor with enhanced ESD rating (≥6 kV HBM), same 1K capacity and rotated SOIC package | Recommended for new designs requiring higher robustness in noisy industrial environments | Select 93LC46C-I/SN when long-term supply continuity and improved latch-up immunity are required |
| AT25010B-MAHL-T | 1K SPI EEPROM (8-pin SOIC, standard pinout), 2.7–5.5V supply, 20 MHz max clock, no ORG pin | Lacks hardware-configurable organization; requires software adaptation for x8/x16 data alignment | Choose AT25010B-MAHL-T only if migrating to SPI interface and accepting fixed 8-bit word width |
Compared with 93LC46X-I/SN, the 93LC46C-I/SN offers identical functionality with superior ESD tolerance and full lifecycle support, while the AT25010B-MAHL-T trades Microwire compatibility and ORG flexibility for higher speed and broader vendor availability - making it suitable only when interface migration is acceptable.
Availability
93LC46X-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, medical infusion pump settings, and consumer remote control ID storage requiring stable component supply across extended production lifecycles.
Supply support for 93LC46X-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 microcontroller, analog, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93LC46X-I/SN belongs to Microchip's legacy Microwire EEPROM product line, designed specifically for cost-sensitive, low-power embedded systems requiring simple, reliable nonvolatile storage with minimal MCU resource usage.
FAQ
What is the memory organization flexibility of the 93LC46X-I/SN?
The 93LC46X-I/SN supports dual memory configurations: 128 × 8-bit when ORG is tied to VSS, or 64 × 16-bit when ORG is tied to VCC. This hardware-selectable mapping eliminates firmware branching for data width handling. The 93LC46X-I/SN does not support dynamic reconfiguration - ORG must be set at power-up and remain stable during operation.
How does the 93LC46X-I/SN handle power transitions to prevent data corruption?
The 93LC46X-I/SN incorporates hardware power-on/off protection that disables all erase/write functions until VCC exceeds 1.4V during startup and locks out programming when VCC falls below 1.4V during shutdown. This ensures data integrity during brown-out conditions. The 93LC46X-I/SN also requires explicit EWEN instruction before any programming, adding software-level safeguarding.
Can the 93LC46X-I/SN be used with a shared DI/DO bus?
The 93LC46X-I/SN allows DI and DO to be connected to the same net only when clock frequency is ≤1 MHz and ORG is configured for x16 mode - but this risks bus conflict during the dummy zero preceding read operations if address bit A0 is high. For reliable operation, separate DI and DO traces are strongly recommended. The 93LC46X-I/SN does not include internal bus contention logic.
What is the timing behavior of the DO pin during erase/write operations?
During erase or write cycles, the DO pin outputs Ready/Busy status: low indicates ongoing programming, high signals completion. To read status, CS must be brought high for ≥250 ns after TCSL, then sampled on the rising edge of CLK. The 93LC46X-I/SN requires an external pull-up resistor on DO for valid high-level status detection.
Is the 93LC46X-I/SN still recommended for new designs?
No - Microchip explicitly states "Not recommended for new designs" in the DS21712C datasheet, advising migration to the 93LC46C-I/SN variant. The 93LC46X-I/SN remains supported for legacy program continuity and repair, but lacks the enhanced ESD performance and extended longevity assurance of the C-series. For new projects, specify 93LC46C-I/SN instead of 93LC46X-I/SN.
93LC46X-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:
- 1Kbit
- Memory Organization:
- 128 x 8, 64 x 16
- Memory Interface:
- Microwire
- Clock Frequency:
- 2 MHz
- Write Cycle Time - Word, Page:
- 10ms
- 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
93LC46X-I/SN FAQ
1.How can I place an order for 93LC46X-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC46X-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 93LC46X-I/SN reliable?
The price and inventory of 93LC46X-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 93LC46X-I/SN is usually 5 days.
3.What payment methods are accepted for 93LC46X-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC46X-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC46X-I/SN?
93LC46X-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC46X-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 93LC46X-I/SN?
For technical support, including 93LC46X-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC46X-I/SN requirements.
6.How does Aetrix verify that 93LC46X-I/SN is sourced from the original manufacturer or authorized distributors?
All 93LC46X-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 93LC46X-I/SN meets industry standards.
7.What is the process for return or replacement of 93LC46X-I/SN?
All 93LC46X-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93LC46X-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 93LC46X-I/SN part is unused and in its original packaging.
Return procedure for 93LC46X-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93LC46X-I/SN Tags
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