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Microchip Technology 93LC46AT-E/MNY
- Part No.:
- 93LC46AT-E/MNY
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
93LC46AT-E/MNY.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,070
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Product details
Overview
93LC46AT-E/MNY from Microchip Technology is a 1 Kbit (128 × 8-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 2.5–5.5 V supply range, and automotive-grade temperature operation (−40°C to +125°C). It features self-timed erase/write cycles, automatic erase-all-before-write-all, power-on/off data protection, and Ready/Busy status signaling via DO pin. Used in automotive body control modules for storing calibration data and configuration settings.
For engineers reviewing the 93LC46AT-E/MNY datasheet, 93LC46AT-E/MNY pinout, 93LC46AT-E/MNY application, or 93LC46AT-E/MNY equivalent, key selection factors include its A-version fixed 8-bit organization (no ORG pin), automotive temperature rating, TSSOP-8 package, 1 million endurance cycles, and 200-year data retention - critical for long-life embedded systems requiring nonvolatile memory with robust write-protection and timing predictability.
Technical Context
This device implements a synchronous serial Microwire protocol with CS, CLK, and DI/DO signals. It uses a dedicated 8-bit memory organization (128 × 8), eliminating ORG pin dependency and simplifying host interface logic. All instructions - READ, WRITE, ERASE, ERAL, WRAL, EWEN, EWDS - are executed via clocked bit sequences on the rising edge of CLK, with DO providing either data output or Ready/Busy status depending on CS timing and instruction phase.
Internal power-on reset and voltage detect circuitry (VPOR = 1.5 V typical) inhibit all operations below VCC threshold, ensuring data integrity during brown-out conditions. Write cycles are fully self-timed (TWC = 6 ms max), and the device powers up in EWDS mode - requiring explicit EWEN before any programming - enhancing system-level reliability in automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1 Kbit (128 × 8-bit organization); fixed x8 mode eliminates external ORG logic and reduces BOM count. |
| Supply voltage | 2.5–5.5 V; supports wide-range automotive rail compatibility including 3.3 V and 5 V systems. |
| Endurance | 1,000,000 erase/write cycles; enables frequent recalibration updates in telematics or sensor fusion modules. |
| Data retention | >200 years at 25°C; ensures firmware configuration persistence over full vehicle lifecycle without refresh. |
| Operating temp | −40°C to +125°C (Automotive E-grade); qualified for under-hood and ADAS domain controller use. |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO); minimal GPIO usage, no SPI mode bits required. |
| Write cycle time | 6 ms max (TWC); deterministic timing allows precise host polling or timeout-based status checking. |
Pinout & Package
93LC46AT-E/MNY is housed in an 8-lead TSSOP (Thin Shrink Small Outline Package) with 0.65 mm lead pitch, RoHS-compliant matte tin finish, and exposed pad option (not used in /MNY variant). Pin 1 marked by laser dot; pin 1 ID corner matches JEDEC MO-153 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; controls Standby entry and Ready/Busy sampling window. |
| CLK (Pin 2) | Serial Clock | Rising-edge synchronized I/O; clock can pause mid-sequence; no clocking required during self-timed write. |
| DI (Pin 3) | Data Input | Accepts Start bit, opcode, address, and write data; high-impedance when not selected. |
| DO (Pin 4) | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge; requires CS high ≥250 ns to sample status. |
| VSS (Pin 5) | Ground | Reference for all I/O and internal logic; decoupling capacitor placement critical near this pin. |
| NC (Pin 6) | No Connect | Internally unconnected; must remain floating or tied to VSS per layout guidelines - no signal routing. |
| VCC (Pin 7) | Power Supply | 2.5–5.5 V input; internal POR triggers at ~1.5 V; voltage detect prevents corruption during power ramp. |
| ORG (Pin 8) | Organization Select | Not applicable - 93LC46A devices have NC on ORG pin; fixed 8-bit operation confirmed by part number suffix 'A'. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control or wait-state insertion in microcontroller firmware. |
| Auto-ERAL before WRAL | Ensures full array readiness prior to bulk write - no separate erase command required in configuration update routines. |
| Power-on/off data protection | Hardware-enforced lockout below 1.5 V VCC prevents partial writes during power transitions. |
| Ready/Busy status on DO | Enables efficient polling without additional pins; avoids need for interrupt-driven status handling. |
| EWEN/EWDS security | Prevents accidental writes - device powers up disabled, requiring explicit enable before each programming session. |
Applications
| Automotive Body Control Unit (BCU) | Industrial Sensor Calibration Storage |
|---|---|
Use Scenario: Storing seat position presets, mirror angle offsets, and lighting profiles across ignition cycles in passenger vehicles. IC Role / Device Role / Timing Role: Nonvolatile configuration memory interfaced directly to 8-bit MCU via Microwire; handles infrequent but safety-critical write operations. Use Value: 125°C rating ensures reliability in dashboard-mounted ECUs; 1M endurance supports lifetime recalibration without wear-out concerns. | Use Scenario: Retaining factory-trimmed offset/gain coefficients for pressure and temperature sensors in HVAC controllers. IC Role / Device Role / Timing Role: Serial EEPROM accessed during power-up initialization to load sensor compensation parameters into ADC driver. Use Value: Fixed 8-bit organization simplifies firmware register mapping; 200-year retention guarantees calibration validity across product service life. |
| Medical Infusion Pump Settings | Smart Meter Firmware Configuration |
Use Scenario: Holding dose limits, alarm thresholds, and user preferences in battery-powered portable infusion pumps. IC Role / Device Role / Timing Role: Low-power serial memory operating from 3.3 V rail; accessed only during setup or maintenance mode. Use Value: 2.5 V minimum VCC enables operation down to depleted Li-ion battery levels (~3.0 V); standby current ≤5 µA extends battery runtime. | Use Scenario: Storing tariff tables, communication keys, and metering constants in ANSI C12.19-compliant smart electricity meters. IC Role / Device Role / Timing Role: Secure configuration store isolated from main application processor; accessed via dedicated secure bootloader. Use Value: Automotive-grade qualification provides proven reliability for 15+ year field deployments; RoHS compliance meets global utility procurement requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC46BT-E/MNY | 16-bit organization (64 × 16), same VCC/temp/package; requires ORG pin tied to VCC or logic high. | Used where host MCU natively supports 16-bit word transfers or needs denser addressing with fewer address bits. | Select only if system architecture mandates 16-bit data path; incompatible with existing 8-bit firmware without modification. |
| AT25010B-MAHL-T | SPI interface (4-wire), 1 Kbit (128 × 8), 1.8–5.5 V, −40°C to +85°C industrial grade; no Ready/Busy pin - relies on WIP flag polling. | Preferred in SPI-based designs with higher throughput needs; lacks automotive temp rating and hardware status pin. | Choose for cost-sensitive industrial applications where extended temperature range is not required and SPI is already implemented. |
Compared with 93LC46BT-E/MNY, the 93LC46AT-E/MNY offers simpler interface timing and guaranteed 8-bit alignment without ORG configuration; versus AT25010B-MAHL-T, it delivers automotive qualification and deterministic Ready/Busy signaling - critical for safety-relevant parameter storage where write completion certainty is mandatory.
Availability
93LC46AT-E/MNY is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and medical device design requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for 93LC46AT-E/MNY 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, with global design and manufacturing operations.
The 93LC46A series belongs to Microchip's legacy Microwire-compatible EEPROM product line, designed specifically for cost-sensitive, low-pin-count embedded systems needing reliable nonvolatile storage with minimal host resource overhead.
FAQ
What is the memory organization of the 93LC46AT-E/MNY?
The 93LC46AT-E/MNY is a fixed 128 × 8-bit (1 Kbit) EEPROM. As an 'A'-suffix device, it has no functional ORG pin - the ORG terminal is internally disconnected (NC), and the memory is permanently configured for 8-bit word access. This eliminates external configuration logic and simplifies integration with 8-bit microcontrollers.
Does the 93LC46AT-E/MNY support both 3.3 V and 5 V operation?
Yes, the 93LC46AT-E/MNY operates across a supply range of 2.5 V to 5.5 V, making it compatible with both 3.3 V and 5 V systems. Its VIH1 threshold (2.0 V min) and VOL1 (0.4 V max at 4.5 V) ensure reliable logic-level interoperability with common MCU I/O families without level-shifting circuitry.
How does the Ready/Busy function work on the 93LC46AT-E/MNY?
The DO pin of the 93LC46AT-E/MNY serves dual purpose: data output during READ, and Ready/Busy status during programming. To read status, CS must be brought high for ≥250 ns after initiating ERASE/WRITE/WRAL; DO = low indicates ongoing operation, DO = high confirms completion. The status is cleared by issuing a Start bit followed by CS low.
Is the 93LC46AT-E/MNY pin-compatible with other 93LC46x variants in TSSOP-8?
Yes - all 93LC46A/B/C variants in TSSOP-8 (e.g., 93LC46BT-E/MNY, 93LC46CT-E/MNY) share identical pinout and footprint. However, functional differences exist: 'A' devices have NC on ORG (Pin 8), 'B' devices require ORG = VCC for 16-bit mode, and 'C' devices support software-selectable organization. Electrical compatibility is maintained, but firmware must match the target variant's instruction set and timing.
What is the significance of the 'E' and '/MNY' suffixes in 93LC46AT-E/MNY?
The 'E' denotes Automotive temperature grade (−40°C to +125°C), qualifying the device for under-hood and safety-critical applications. The '/MNY' suffix specifies packaging: 8-lead TSSOP with matte tin (Pb-free) finish, tape-and-reel delivery, and Microchip's standard marking format including date code and traceability characters.
93LC46AT-E/MNY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Kbit
- Memory Organization:
- 128 x 8
- Memory Interface:
- Microwire
- Clock Frequency:
- 2 MHz
- Write Cycle Time - Word, Page:
- 6ms
- 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-TDFN (2x3)
93LC46AT-E/MNY FAQ
1.How can I place an order for 93LC46AT-E/MNY through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC46AT-E/MNY 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 93LC46AT-E/MNY reliable?
The price and inventory of 93LC46AT-E/MNY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC46AT-E/MNY is usually 5 days.
3.What payment methods are accepted for 93LC46AT-E/MNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC46AT-E/MNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC46AT-E/MNY?
93LC46AT-E/MNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC46AT-E/MNY 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 93LC46AT-E/MNY?
For technical support, including 93LC46AT-E/MNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC46AT-E/MNY requirements.
6.How does Aetrix verify that 93LC46AT-E/MNY is sourced from the original manufacturer or authorized distributors?
All 93LC46AT-E/MNY 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 93LC46AT-E/MNY meets industry standards.
7.What is the process for return or replacement of 93LC46AT-E/MNY?
All 93LC46AT-E/MNY units undergo pre-shipment inspection (PSI). If there is an issue with 93LC46AT-E/MNY, 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 93LC46AT-E/MNY part is unused and in its original packaging.
Return procedure for 93LC46AT-E/MNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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