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Microchip Technology 93C46BT-I/MS
- Part No.:
- 93C46BT-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
93C46BT-I/MS.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,987
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Product details
Overview
93C46BT-I/MS from Microchip Technology Inc. is a 1 Kbit (128 × 8-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, operating over 4.5–5.5 V supply, rated for -40°C to +85°C industrial temperature range, and housed in an 8-lead MSOP package. It provides nonvolatile memory storage for configuration data, calibration parameters, or system identifiers in embedded controllers and power management ICs.
For engineers reviewing the 93C46BT-I/MS datasheet, 93C46BT-I/MS pinout, 93C46BT-I/MS application, or 93C46BT-I/MS equivalent, key selection criteria include its dedicated 8-bit organization (no ORG pin), 2 ms erase/write cycle time, Ready/Busy status signaling via DO, 1 million endurance cycles, and RoHS-compliant Pb-free MSOP packaging.
Technical Context
The 93C46BT-I/MS implements a synchronous serial Microwire interface with CS, CLK, and DI/DO pins - no ORG pin present, confirming fixed 8-bit word organization. Its internal architecture includes auto-erase-before-write, automatic ERAL before WRAL, and power-on/off data protection circuitry that inhibits operation below 3.8 V VCC.
Timing is governed by strict AC specifications: max 3 MHz clock frequency at 4.5–5.5 V, 250 ns minimum CS low time (TCSL), and 200 ns data output delay (TPD). The device enters Standby mode when CS is low, and supports sequential read with automatic address increment while CS remains high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1 Kbit (128 × 8-bit); fixed x8 organization - no ORG pin required, simplifying PCB layout and firmware addressing. |
| VCC range | 4.5 V to 5.5 V; operation inhibited below 3.8 V - ensures data integrity during brown-out conditions. |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO); no separate ORG or WP pins - reduces GPIO count on host MCU. |
| Write cycle time | 2 ms typical (TWC); self-timed erase-and-write - eliminates need for external timing control or polling overhead beyond R/B status. |
| Endurance | 1,000,000 erase/write cycles; >200 years data retention - suitable for field-updatable calibration or logging applications. |
| Temperature range | -40°C to +85°C (Industrial grade); validated across full range - supports deployment in industrial controls and automotive body electronics. |
| Package | 8-lead MSOP (3.0 × 3.0 × 1.0 mm); Pb-free Matte Tin finish - enables compact, surface-mount assembly with standard reflow profiles. |
Pinout & Package
8-lead MSOP package (Microchip package code "MS"), pin-compatible with SOIC-8 and TSSOP-8 footprints but with reduced footprint area and thermal profile. Pin 1 marked by laser dot; exposed pad optional (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CS | Chip Select - active-high enable; must be held low ≥250 ns between instructions to reset internal logic. |
| 2 | CLK | Serial Clock - rising-edge synchronized I/O; clock can be paused mid-transfer without state corruption. |
| 3 | DI | Data Input - accepts Start bit, opcode, address, and write data; tolerant of bus conflict if shared with DO (with series resistor). |
| 4 | DO | Data Output / Ready-Busy - outputs read data or R/B status (low = busy); enters High-Z when CS goes low. |
| 5 | VSS | Ground - reference for all I/O and internal circuitry; must be low-impedance connection. |
| 6 | NC | No internal connection - left unconnected; not tied to VSS or any other node. |
| 7 | ORG | No internal connection - absent on 'A'/'B' variants; this pin is NC per Device Selection Table and Pin Function Table. |
| 8 | VCC | Power Supply - 4.5–5.5 V only; internal POR triggers at 3.8 V to prevent partial writes. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | 2 ms typical cycle time with no external timing components - reduces firmware complexity and host CPU load. |
| Ready/Busy status on DO | Real-time hardware indication of programming progress - enables efficient polling instead of fixed delays. |
| Power-on/off data protection | Automatic inhibition below 3.8 V VCC - prevents corruption during power ramp-up/down or brown-out events. |
| Erase All (ERAL) & Write All (WRAL) | Single-instruction bulk operations with auto-ERAL before WRAL - accelerates factory programming or recovery sequences. |
| Industry-standard 3-wire interface | Drop-in compatibility with existing Microwire-based EEPROM drivers - minimizes software porting effort. |
Applications
| Industrial Sensor Calibration | Embedded Power Management |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed during boot; 8-bit word size matches ADC register width. Use Value: Enables one-time calibration at production test, eliminating manual potentiometer adjustment and improving long-term stability. | Use Scenario: Holding voltage threshold settings and fault log history in DC-DC controller modules used in telecom power supplies. IC Role / Device Role / Timing Role: Persistent parameter storage with fast 2 ms writes - allows real-time updates during dynamic load changes. Use Value: Supports adaptive regulation and post-fault diagnostics without requiring external FRAM or battery-backed RAM. |
| Automotive Body Control Unit | Consumer Appliance Configuration |
Use Scenario: Saving user preferences (e.g., mirror position, seat memory) in vehicle body control modules operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Industrial-grade EEPROM interfaced to 8-bit microcontroller via Microwire; no ORG pin simplifies routing. Use Value: Meets AEC-Q100 stress requirements for ambient temperature and provides >200-year data retention for lifetime vehicle use. | Use Scenario: Storing language selection, display contrast, and timer presets in smart home appliances with limited board space. IC Role / Device Role / Timing Role: Compact 8-lead MSOP EEPROM sharing SPI-like bus with display driver and touch controller. Use Value: Reduces BOM count versus larger SOIC packages while maintaining full 1 M-cycle endurance for frequent UI updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC46BT-I/MS | Wider VCC range (2.5–5.5 V); same 8-lead MSOP package and pinout; supports Industrial and Extended temp. | Enables single-BOM design across 3.3 V and 5 V systems; higher flexibility in mixed-voltage boards. | Select when system operates below 4.5 V or requires extended temperature support up to +125°C. |
| AT25010B-MAHL-T | SPI interface (4-wire), 1.8–5.5 V operation, 2 MHz max clock; different pinout (SOIC-8), no Ready/Busy pin. | Lacks hardware R/B status - requires fixed-delay or command-status polling; incompatible pin mapping. | Choose only if migrating to SPI infrastructure and accepting software-driven timing control instead of DO-based status. |
Compared with 93LC46BT-I/MS and AT25010B-MAHL-T, the 93C46BT-I/MS offers deterministic 2 ms write timing and hardware Ready/Busy signaling within its 4.5–5.5 V window, making it optimal for time-critical 5 V-only systems where pin compatibility and minimal firmware overhead are prioritized.
Availability
93C46BT-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded power management, and automotive body control unit designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 93C46BT-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 devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93Cxx family was designed specifically for cost-sensitive, low-power serial EEPROM applications in industrial and automotive systems where reliability, small footprint, and Microwire compatibility are essential.
FAQ
What is the memory organization of the 93C46BT-I/MS?
The 93C46BT-I/MS has a fixed 128 × 8-bit (1 Kbit) organization. It belongs to the 'A' variant group, meaning the ORG pin is not functional and is internally disconnected - no external configuration is needed to select word size. This simplifies design and eliminates risk of misconfiguration during power-up.
Does the 93C46BT-I/MS support hardware write protection?
The 93C46BT-I/MS does not include a dedicated write-protect (WP) pin. Instead, it uses Erase/Write Enable (EWEN) and Erase/Write Disable (EWDS) commands to control programming access. After power-up, the device defaults to EWDS mode, requiring an explicit EWEN instruction before any ERASE or WRITE operation - providing software-controlled, robust data protection.
What is the maximum clock frequency supported by the 93C46BT-I/MS?
The 93C46BT-I/MS supports a maximum clock frequency of 3 MHz when VCC is between 4.5 V and 5.5 V. This is specified in Table 1-2 (A1, FCLK) of the datasheet. At lower voltages, the max clock rate decreases - but since the 93C46BT-I/MS is rated only for 4.5–5.5 V, 3 MHz is its guaranteed operational limit.
Can the 93C46BT-I/MS be used in automotive applications?
The 93C46BT-I/MS is rated for Industrial temperature range (-40°C to +85°C), not Automotive (E-grade, -40°C to +125°C). While it may function in some under-hood environments, it is not qualified to AEC-Q100 or specified for E-temp operation. For automotive use, consider the 93C46BT-E/MS or 93LC46BT-E/MS variants instead.
How is the Ready/Busy status signaled on the 93C46BT-I/MS?
The 93C46BT-I/MS signals Ready/Busy status on the DO pin: DO = low indicates an erase or write operation is in progress; DO = high means the device is ready for the next instruction. To read status, CS must be brought high for ≥250 ns after the operation starts - DO then transitions from High-Z to active status.
93C46BT-I/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Kbit
- Memory Organization:
- 64 x 16
- Memory Interface:
- Microwire
- Clock Frequency:
- 2 MHz
- Write Cycle Time - Word, Page:
- 2ms
- Access Time:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
93C46BT-I/MS FAQ
1.How can I place an order for 93C46BT-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C46BT-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 93C46BT-I/MS reliable?
The price and inventory of 93C46BT-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 93C46BT-I/MS is usually 5 days.
3.What payment methods are accepted for 93C46BT-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C46BT-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C46BT-I/MS?
93C46BT-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C46BT-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 93C46BT-I/MS?
For technical support, including 93C46BT-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C46BT-I/MS requirements.
6.How does Aetrix verify that 93C46BT-I/MS is sourced from the original manufacturer or authorized distributors?
All 93C46BT-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 93C46BT-I/MS meets industry standards.
7.What is the process for return or replacement of 93C46BT-I/MS?
All 93C46BT-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 93C46BT-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 93C46BT-I/MS part is unused and in its original packaging.
Return procedure for 93C46BT-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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