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Microchip Technology 93LC46AT-E/MS
- Part No.:
- 93LC46AT-E/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
93LC46AT-E/MS.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,119
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Product details
Overview
93LC46AT-E/MS from Microchip Technology Inc. is a 1Kbit (128 × 8-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, operating across 2.5–5.5 V, supporting Industrial and Automotive temperature ranges (−40°C to +125°C), and housed in an 8-lead MSOP package. It delivers self-timed erase/write cycles, automatic ERAL/WRAL support, and Ready/Busy status signaling - used for configuration storage in automotive body controllers and industrial sensor nodes.
For engineers reviewing the 93LC46AT-E/MS datasheet, 93LC46AT-E/MS pinout, 93LC46AT-E/MS application, or 93LC46AT-E/MS equivalent, key selection criteria include its 8-bit fixed organization (no ORG pin), automotive-grade qualification (E-temp), MSOP packaging for space-constrained PCBs, and compatibility with legacy Microwire host controllers requiring deterministic timing and hardware data protection.
Technical Context
This device implements a synchronous serial interface using CS, CLK, and DI/DO lines with start-bit detection and opcode-driven command execution. It supports READ, WRITE, ERASE, ERAL, WRAL, EWEN, and EWDS instructions with clock-synchronized data transfer on rising CLK edges.
Internally, it features power-on/off data protection circuitry, automatic erase-before-write, and a dedicated Ready/Busy status output via DO pin during programming - all enabled without external timing components. Its 128 × 8-bit memory array is accessed via 7-bit addressing and requires no external pull-ups for standard operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1 Kbit (128 × 8-bit organization; fixed, no ORG pin) |
| VCC range | 2.5 V to 5.5 V - supports wide-input industrial and automotive rails |
| Temperature grade | Automotive (E): −40°C to +125°C - qualified for under-hood and chassis applications |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - interoperable with legacy microcontrollers lacking SPI hardware |
| Write endurance | 1,000,000 erase/write cycles - ensures long-term reliability in frequent reconfiguration scenarios |
| Data retention | 200 years at +25°C - guarantees nonvolatile storage integrity over product lifetime |
| Max clock frequency | 3 MHz at VCC ≥ 4.5 V - enables fast configuration loading without CPU overhead |
| Package | 8-lead MSOP (3.0 × 3.0 mm, 0.65 mm pitch) - surface-mount compatible with automated assembly |
Pinout & Package
8-lead MSOP (MS) package with exposed pad (optional VSS connection); RoHS-compliant matte tin finish. Pin 1 marked by laser dot; pin 1 ID corner defined per JEDEC MO-187.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CS | Chip Select - active-high enable; must be held low ≥250 ns between commands |
| 2 | CLK | Serial Clock - rising-edge synchronized I/O; stoppable mid-transfer |
| 3 | DI | Data Input - receives start bit, opcodes, addresses, and write data |
| 4 | DO | Data Output - outputs read data or Ready/Busy status (low = busy) |
| 5 | VSS | Ground - reference for all signals and internal logic |
| 6 | NC | No internal connection - must be left unconnected or tied to VSS |
| 7 | ORG | No internal connection - not present on 'A' devices like 93LC46AT-E/MS |
| 8 | VCC | Power supply - decoupling capacitor required within 10 mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write cycles | Eliminates need for external timing control; TWC = 6 ms typical for full cycle |
| Automatic ERAL before WRAL | Ensures clean memory state prior to bulk write - no separate erase command needed |
| Hardware data protection | Power-on/off voltage detect (VPOR = 1.5 V) blocks writes below safe VCC threshold |
| Erase/write enable/disable (EWEN/EWDS) | Prevents accidental writes; device powers up in EWDS mode for default safety |
| Sequential read mode | Enables rapid dump of multiple registers with single CS assertion - reduces bus overhead |
| Ready/Busy status on DO | Allows polling-based flow control without interrupt or timer dependency |
Applications
| Automotive Body Control Module | Industrial Sensor Calibration Storage |
|---|---|
Use Scenario: Storing door lock configuration, mirror position presets, and lighting profiles in vehicle BCMs. IC Role / Device Role / Timing Role: Nonvolatile configuration EEPROM interfaced directly to 8-bit MCU via Microwire. Use Value: Automotive temperature rating and 200-year data retention ensure settings persist across vehicle lifetime and thermal cycling. |
Use Scenario: Holding factory-calibrated offset/gain coefficients for analog sensor front-ends in industrial transmitters. IC Role / Device Role / Timing Role: Serial configuration memory accessed during power-up initialization sequence. Use Value: 1M endurance supports field recalibration cycles; MSOP package fits tight-layout sensor modules. |
| Medical Infusion Pump Settings | Smart Energy Meter Firmware Parameters |
Use Scenario: Retaining drug library, dose limits, and alarm thresholds in battery-backed medical devices. IC Role / Device Role / Timing Role: Secure, low-power configuration store accessed only during setup or firmware update. Use Value: Hardware write protection (EWEN/EWDS) prevents runtime corruption; 2.5 V min VCC supports brownout-safe operation. |
Use Scenario: Storing tariff schedules, metering constants, and communication keys in utility-grade smart meters. IC Role / Device Role / Timing Role: Tamper-resistant parameter storage isolated from main application processor. Use Value: RoHS-compliant packaging and AEC-Q100-aligned E-temp qualification meet utility certification 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/MS | 16-bit organization (64 × 16), same VCC/temp/package - requires ORG pin tied high (not applicable here) | Used where host controller natively supports 16-bit word transfers; incompatible with 8-bit-only firmware | Select only if system architecture mandates 16-bit data path and firmware supports x16 opcodes |
| AT25010B-MAHL-T | SPI interface (4-wire), 1 Kbit (128 × 8), 1.8–5.5 V, −40°C to +125°C, 8-lead SOIC - different protocol and pinout | Requires SPI-capable host; lacks Microwire compatibility and ERAL/WRAL instructions | Choose when migrating to SPI ecosystem; not drop-in replaceable due to interface and command set mismatch |
Compared with 93LC46BT-E/MS, the 93LC46AT-E/MS provides native 8-bit compatibility without ORG pin management; versus AT25010B-MAHL-T, it retains Microwire timing and instruction set critical for legacy automotive designs but requires no MISO/MOSI separation.
Availability
93LC46AT-E/MS is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor calibration, medical infusion pump configuration, and smart energy meter parameter storage requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 93LC46AT-E/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 microcontroller, mixed-signal, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design, manufacturing, and sales operations.
The 93LC46A/B/C series belongs to Microchip's legacy Microwire-compatible EEPROM product line, designed specifically for cost-sensitive, space-constrained applications requiring robust nonvolatile storage with minimal host resource usage.
FAQ
What is the memory organization of the 93LC46AT-E/MS?
The 93LC46AT-E/MS is a fixed 128 × 8-bit (1 Kbit) organization device - it does not feature an ORG pin and operates exclusively in x8 mode. This differs from 'C' variants (e.g., 93LC46CT-E/MS) which use the ORG pin to select between x8 and x16 configurations. The 'A' suffix in 93LC46AT-E/MS explicitly denotes this dedicated 8-bit structure.
Does the 93LC46AT-E/MS support automotive temperature range?
Yes, the 93LC46AT-E/MS is rated for the Automotive (E) temperature range of −40°C to +125°C, as confirmed by its part number suffix 'E' and the Device Selection Table in DS20001749K. This qualification makes it suitable for under-hood, chassis, and infotainment subsystems where extended thermal performance is mandatory.
What package type is used for the 93LC46AT-E/MS?
The 93LC46AT-E/MS uses an 8-lead MSOP (Mini Small Outline Package) with 3.0 mm × 3.0 mm body dimensions and 0.65 mm lead pitch. The package includes an exposed pad (optional VSS connection) and matte tin (Pb-free) finish, compliant with RoHS Directive 2011/65/EU.
How does the Ready/Busy status function on the 93LC46AT-E/MS?
The DO pin of the 93LC46AT-E/MS serves dual purpose: it outputs read data and indicates Ready/Busy status during erase/write operations. When CS is brought high after ≥250 ns low time (TCSL), DO goes low to signal ongoing programming and returns high upon completion - enabling simple polling-based host synchronization without interrupts.
Is the 93LC46AT-E/MS pin-compatible with other 93XX46 devices in MSOP package?
Yes, all 93XX46A/B/C variants in MSOP (MS) package share identical 8-pin mapping and mechanical footprint per Microchip's Package Types diagram (DS20001749K-page 2). However, functional compatibility depends on organization (A vs B vs C) and temperature grade - the 93LC46AT-E/MS pinout matches 93LC46BT-E/MS and 93LC46CT-E/MS, though ORG pin is NC on 'A' devices.
93LC46AT-E/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:
- 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-MSOP
93LC46AT-E/MS FAQ
1.How can I place an order for 93LC46AT-E/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC46AT-E/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 93LC46AT-E/MS reliable?
The price and inventory of 93LC46AT-E/MS 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/MS is usually 5 days.
3.What payment methods are accepted for 93LC46AT-E/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC46AT-E/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC46AT-E/MS?
93LC46AT-E/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC46AT-E/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 93LC46AT-E/MS?
For technical support, including 93LC46AT-E/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC46AT-E/MS requirements.
6.How does Aetrix verify that 93LC46AT-E/MS is sourced from the original manufacturer or authorized distributors?
All 93LC46AT-E/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 93LC46AT-E/MS meets industry standards.
7.What is the process for return or replacement of 93LC46AT-E/MS?
All 93LC46AT-E/MS units undergo pre-shipment inspection (PSI). If there is an issue with 93LC46AT-E/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 93LC46AT-E/MS part is unused and in its original packaging.
Return procedure for 93LC46AT-E/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93LC46AT-E/MS Tags
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