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Microchip Technology 93LC46CXT-E/SN
- Part No.:
- 93LC46CXT-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC46CXT-E/SN.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,635
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Product details
Overview
93LC46CXT-E/SN from Microchip Technology Inc. is a 1 Kbit low-voltage serial EEPROM with Microwire-compatible 3-wire interface, ORG pin for selectable 8-/16-bit word organization, and automotive-grade temperature support (−40°C to +125°C). It delivers 1,000,000 erase/write cycles, >200 years data retention, and self-timed erase/write operations. Used in automotive body control modules for storing calibration data and configuration settings.
For engineers reviewing the 93LC46CXT-E/SN datasheet, 93LC46CXT-E/SN pinout, 93LC46CXT-E/SN application, or 93LC46CXT-E/SN equivalent, key selection considerations include VCC range (2.5–5.5 V), ORG-configurable memory width, Ready/Busy status signaling via DO, sequential read capability, and automotive qualification per E-temp grade.
Technical Context
The 93LC46CXT-E/SN implements a synchronous serial Microwire interface with CS, CLK, DI, and DO signals, where instruction execution begins on detection of a Start condition (CS high and DI high on CLK rising edge). Memory organization is dynamically selected by the ORG pin: logic high enables 64 × 16-bit mode; logic low enables 128 × 8-bit mode.
It features hardware-based data protection including power-on/off voltage detection (VPOR = 2.5 V typ.), automatic EWDS at power-up, and mandatory EWEN before any erase/write. All programming cycles - ERASE, WRITE, ERAL, WRAL - are self-timed and generate Ready/Busy status on DO when CS is reasserted after TCSL ≥ 250 ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Kbit (128 × 8-bit or 64 × 16-bit, configurable via ORG pin) |
| VCC Range | 2.5 V to 5.5 V - supports wide-input industrial and automotive power rails without external regulation |
| Temp Grade | Automotive (E): −40°C to +125°C - qualified for under-hood and chassis-mounted applications |
| Endurance | 1,000,000 erase/write cycles - enables frequent firmware parameter updates in vehicle ECUs |
| Data Retention | >200 years at +25°C - ensures long-term reliability across vehicle lifetime without refresh |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - minimal GPIO usage, compatible with legacy microcontrollers |
| Max Clock Frequency | 3 MHz at VCC ≥ 4.5 V - enables fast configuration loading during boot sequence |
| Write Cycle Time | 6 ms typical (TWC) - deterministic timing for real-time system scheduling |
Pinout & Package
93LC46CXT-E/SN is packaged in an 8-lead SOIC (SN) with Pb-free Matte Tin finish. Pin 1 is CS, pin 2 is CLK, pin 3 is DI, pin 4 is DO, pin 5 is VSS, pin 6 is ORG (functional - selects 8-/16-bit mode), pin 7 is NC (no internal connection), and pin 8 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; initiates self-timed write on falling edge (93LC) |
| CLK | Serial Clock | Synchronizes all data transfers on rising edge; stoppable at any point without corruption |
| DI | Data Input | Accepts Start bit, opcode, address, and write data; requires external pull-down if shared with DO |
| DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge |
| VSS | Ground | Reference for all I/O and internal circuitry; must be low-impedance connection |
| ORG | Organization Control | Logic high → 64×16-bit; logic low → 128×8-bit; must be externally biased - not floating |
| NC | No Internal Connection | Unused pin; no electrical function; may be left unconnected or tied to ground for mechanical stability |
| VCC | Power Supply | 2.5–5.5 V supply; VPOR threshold ~2.5 V ensures safe power-up sequencing |
Key Features
| Feature | Design Value |
|---|---|
| ORG-pin word-size selection | Enables single BOM for both 8-bit and 16-bit host interfaces without redesign |
| Self-timed erase/write with auto-erase | Eliminates need for external timing control or watchdog timeout management |
| ERAL and WRAL commands | Supports full-array initialization in one command - critical for secure factory provisioning |
| Ready/Busy status on DO | Allows polling-based flow control without additional status pins or interrupts |
| Power-on/off data protection | Hardware lockout below VPOR prevents partial writes during brown-out conditions |
| RoHS-compliant Pb-free packaging | Meets global automotive environmental compliance requirements (e.g., ELV, REACH) |
Applications
| Automotive Body Control Module | Industrial Sensor Calibration Storage |
|---|---|
Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in vehicle door modules. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with ORG set to 16-bit for efficient CAN message payload mapping. Use Value: 1M endurance supports daily user adjustments over 10+ years; E-temp rating ensures operation near power electronics. | Use Scenario: Retaining factory-trimmed offset/gain coefficients for analog sensor front-ends in PLC I/O modules. IC Role / Device Role / Timing Role: Low-power serial EEPROM interfaced to MCU SPI peripheral using Microwire protocol emulation. Use Value: >200-year data retention eliminates field recalibration; 2.5 V min VCC allows direct connection to 3.3 V rail without level shifters. |
| Medical Infusion Pump Settings | Smart Energy Meter Firmware Parameters |
Use Scenario: Securely storing drug library limits, alarm thresholds, and audit logs in Class II medical devices. IC Role / Device Role / Timing Role: Configuration EEPROM accessed during boot and runtime via dedicated GPIO-controlled Microwire bus. Use Value: Hardware write-protection (EWEN/EWDS) prevents accidental overwrite during power transitions; RoHS compliance meets IEC 60601-1. | Use Scenario: Holding tariff schedules, metering constants, and communication keys in ANSI C12.22-compliant smart meters. IC Role / Device Role / Timing Role: Tamper-resistant nonvolatile memory with sequential read for rapid parameter loading during wake-up. Use Value: 6 ms write time enables full parameter update within 100 ms budget; automotive-grade reliability extends field life beyond 15 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC46BXT-E/SN | Dedicated 16-bit organization (no ORG pin); same VCC range and E-temp rating | Requires fixed 16-bit host interface; no runtime reconfiguration capability | Select when memory width is invariant and PCB layout prioritizes pin count reduction |
| AT25010B-MAHL-T | SPI interface (4-wire), 1 Kbit, 1.8–5.5 V, industrial temp only (−40°C to +85°C) | Lacks automotive qualification and ORG flexibility; uses standard SPI instead of Microwire | Choose for new designs with SPI-native MCUs where E-temp is not required |
Compared with 93LC46BXT-E/SN, the 93LC46CXT-E/SN adds runtime word-width configurability at the cost of one extra pin; compared with AT25010B-MAHL-T, it provides automotive qualification and Microwire compatibility but lacks SPI standardization and lower-voltage operation.
Availability
93LC46CXT-E/SN is available at Aetrix Electronics and suitable for automotive body control, industrial sensor calibration, medical device configuration, and smart energy metering requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 93LC46CXT-E/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, mixed-signal, analog, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets with high-reliability silicon and development tools.
The 93LC46CXT-E/SN belongs to Microchip's legacy 93XX serial EEPROM family, designed specifically for cost-sensitive, low-power, nonvolatile memory applications in resource-constrained embedded systems with strict automotive qualification requirements.
FAQ
What is the function of the ORG pin on the 93LC46CXT-E/SN?
The ORG pin on the 93LC46CXT-E/SN selects memory organization: logic high configures 64 × 16-bit mode; logic low configures 128 × 8-bit mode. It must be externally biased to a valid logic level (VCC or VSS) - floating is not permitted. This pin is unique to 'C' variants like the 93LC46CXT-E/SN and absent on 'A'/'B' versions.
Does the 93LC46CXT-E/SN support sequential read operations?
Yes, the 93LC46CXT-E/SN supports sequential read: when CS remains high after a READ instruction, the internal address counter automatically increments, and subsequent clock edges output the next memory location's data on DO. This enables efficient bulk reads without reissuing opcodes or addresses.
What is the minimum VCC required for reliable operation of the 93LC46CXT-E/SN?
The 93LC46CXT-E/SN requires a minimum VCC of 2.5 V for guaranteed operation across its full automotive temperature range (−40°C to +125°C). Below this, the internal voltage detector (VPOR ≈ 2.5 V) disables all write functions and places the device in hardware-protected standby mode to prevent data corruption.
How does the Ready/Busy status work on the 93LC46CXT-E/SN?
The 93LC46CXT-E/SN asserts Ready/Busy status on the DO pin: DO = low indicates ongoing erase/write; DO = high indicates completion. To sample status, CS must be brought high for ≥250 ns after TCSL, then DO is sampled on CLK rising edges. DO returns to High-Z on CS falling edge.
Is the 93LC46CXT-E/SN pin-compatible with other 93XX46 variants in SOIC-8 package?
Yes, the 93LC46CXT-E/SN shares identical SOIC-8 (SN) pinout with all 93XX46A/B/C variants, including pin 1 (CS) through pin 8 (VCC). However, pin 6 is ORG (functional) on 'C' versions but NC on 'A'/'B' versions, and pin 7 is NC on all - so direct substitution requires verifying ORG handling and firmware compatibility.
93LC46CXT-E/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- 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:
- 3 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-SOIC
93LC46CXT-E/SN FAQ
1.How can I place an order for 93LC46CXT-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC46CXT-E/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 93LC46CXT-E/SN reliable?
The price and inventory of 93LC46CXT-E/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC46CXT-E/SN is usually 5 days.
3.What payment methods are accepted for 93LC46CXT-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC46CXT-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC46CXT-E/SN?
93LC46CXT-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC46CXT-E/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 93LC46CXT-E/SN?
For technical support, including 93LC46CXT-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC46CXT-E/SN requirements.
6.How does Aetrix verify that 93LC46CXT-E/SN is sourced from the original manufacturer or authorized distributors?
All 93LC46CXT-E/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 93LC46CXT-E/SN meets industry standards.
7.What is the process for return or replacement of 93LC46CXT-E/SN?
All 93LC46CXT-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93LC46CXT-E/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 93LC46CXT-E/SN part is unused and in its original packaging.
Return procedure for 93LC46CXT-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93LC46CXT-E/SN Tags
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