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Microchip Technology 93LC56BXT-E/SN
- Part No.:
- 93LC56BXT-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC56BXT-E/SN.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,371
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Product details
Overview
93LC56BXT-E/SN from Microchip Technology Inc. is a 2 Kbit (128 × 16-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 ERAL before WRAL, power-on/off data protection, and Ready/Busy status signaling - deployed in engine control units for calibration storage.
For engineers reviewing the 93LC56BXT-E/SN datasheet, 93LC56BXT-E/SN pinout, 93LC56BXT-E/SN application, or 93LC56BXT-E/SN equivalent, key selection criteria include its dedicated 16-bit organization, automotive temperature rating, SOIC-8 (SN) package, 1 million endurance cycles, and compatibility with legacy Microwire host controllers requiring minimal firmware changes.
Technical Context
The 93LC56BXT-E/SN implements a synchronous serial interface with CS, CLK, and DI/DO pins operating on rising-edge clocking. Its fixed 128 × 16-bit memory map eliminates ORG pin dependency, simplifying hardware design versus C-variant parts. All instructions - READ, WRITE, ERASE, ERAL, WRAL - are executed via 12-clock-cycle opcodes with address/data fields aligned to x16 width.
Internal logic enforces power-on write protection: device powers up in EWDS (Erase/Write Disable) mode, requiring explicit EWEN command before any programming. Ready/Busy status is actively driven on DO during erase/write operations and cleared only after CS toggling post-completion, ensuring deterministic host polling behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit organized as 128 words × 16 bits - enables compact storage of 16-bit sensor calibration tables without bit-packing overhead. |
| VCC range | 2.5 V to 5.5 V - supports direct connection to 3.3 V or 5 V automotive microcontroller I/O rails without level-shifting. |
| Endurance | 1,000,000 erase/write cycles - ensures reliable field updates over 15+ years in telematics firmware patching applications. |
| Data retention | Greater than 200 years at 25°C - guarantees nonvolatile storage integrity across vehicle lifetime without refresh. |
| Write cycle time | 6 ms typical (TWC) - defines minimum inter-write interval; compatible with CAN-based diagnostic session timing constraints. |
| Temperature grade | Automotive (E): −40°C to +125°C - qualified for under-hood ECU deployment per AEC-Q100 stress requirements. |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - interoperable with legacy PIC® MCU peripheral modules without driver modification. |
Pinout & Package
93LC56BXT-E/SN is packaged in an 8-lead SOIC (SN) with 150-mil body width and Pb-free Matte Tin finish. Pin 1 is marked by laser dot; exposed pad is absent (non-DNF/TDFN variant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select | Active-high enable: must be held ≥250 ns low between instructions; deselects device into standby but allows ongoing write completion. |
| CLK (Pin 2) | Serial Clock | Rising-edge synchronized I/O; clock can pause mid-transfer; no clock required during self-timed write cycle. |
| DI (Pin 3) | Data Input | Accepts Start bit, opcode, address, and 16-bit data; high-impedance when CS low; requires external pull-down on CS for noise immunity. |
| DO (Pin 4) | Data Output / Status | Outputs 16-bit read data or drives Ready (high)/Busy (low); enters High-Z on CS falling edge; status valid only after TCSL delay. |
| VSS (Pin 5) | Ground | Reference return for all signals; must be low-impedance path to system ground plane to maintain timing margins. |
| NC (Pin 6) | No Connection | Internally unconnected; must remain floating - not tied to VSS/VCC to avoid parasitic leakage paths. |
| VCC (Pin 8) | Power Supply | Supplies core logic and memory array; internal POR triggers at ~1.5 V; requires local 0.1 µF ceramic decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control or busy-wait loops - host initiates operation and polls DO for completion. |
| Automatic ERAL before WRAL | Guarantees full-array erasure prior to bulk write, preventing stale data corruption without software intervention. |
| Power-on/off data protection | Hardware-level lockout below 1.5 V VCC prevents partial writes during brown-out or hot-plug events. |
| 128 × 16-bit fixed organization | Removes ORG pin routing complexity and eliminates configuration errors in production PCB layout. |
| Ready/Busy status on DO | Enables real-time progress monitoring using single GPIO pin - reduces host resource usage vs. timer-based polling. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Storing fuel injection timing maps and knock sensor calibration coefficients updated during dealer reprogramming. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with guaranteed write integrity under battery voltage transients. Use Value: 128 × 16-bit layout matches ECU lookup table word width, reducing firmware address arithmetic and enabling atomic 16-bit writes. | Use Scenario: Retaining camera lens focus offset values and radar sensor compensation profiles across ignition cycles. IC Role / Device Role / Timing Role: Automotive-grade EEPROM interfacing directly with ADAS SoC's Microwire controller. Use Value: −40°C to +125°C rating ensures reliability in front-bumper-mounted radar modules exposed to solar loading. |
| Telematics Control Unit (TCU) | Body Control Module (BCM) |
Use Scenario: Securely storing OTA update metadata, cryptographic keys, and firmware version history. IC Role / Device Role / Timing Role: Tamper-resistant configuration storage with write-disable on power loss. Use Value: EWEN/EWDS command sequence provides software-controlled write gating - critical for secure boot chain integrity. | Use Scenario: Holding door lock actuator timing parameters and interior lighting fade profiles customized per vehicle trim level. IC Role / Device Role / Timing Role: Low-power serial memory accessed intermittently during sleep-mode wakeups. Use Value: 1 µA standby current (ICCS) extends battery life in always-on BCM circuits during vehicle park mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC56BT-I/SN | Industrial temp grade (−40°C to +85°C); identical electrical specs and pinout. | Not qualified for under-hood automotive use; suitable for cabin-infotainment modules. | Select only if ambient operating temperature remains ≤85°C and AEC-Q100 compliance is not required. |
| AT25128AN-10SU-2.7 | SPI interface (4-wire), 128 Kbit capacity, 2.7–5.5 V VCC, 5 MHz max clock. | Higher density and faster interface, but requires SPI driver stack and different command set. | Choose when migrating to SPI-based platforms or needing >2 Kbit storage; not drop-in replaceable. |
Compared with 93LC56BXT-E/SN, the 93LC56BT-I/SN offers identical functionality at lower cost but lacks automotive qualification, while the AT25128AN-10SU-2.7 provides greater density and speed at the expense of interface compatibility and firmware porting effort.
Availability
93LC56BXT-E/SN is available at Aetrix Electronics and suitable for automotive electronics, engine management systems, and ADAS modules requiring stable component supply across extended product lifecycles.
Supply support for 93LC56BXT-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 microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona.
The 93LC56x series belongs to Microchip's legacy Microwire-compatible EEPROM product line, designed specifically for cost-sensitive, low-pin-count embedded systems requiring robust nonvolatile storage in harsh environments.
FAQ
What is the memory organization of the 93LC56BXT-E/SN?
The 93LC56BXT-E/SN has a fixed 128 × 16-bit organization - meaning it stores 128 words of 16 bits each, totaling 2 Kbit. Unlike 'C' variants, it does not use the ORG pin; its x16 structure is hardwired, simplifying PCB layout and eliminating configuration risk. This matches common microcontroller data bus widths used in automotive control applications.
Does the 93LC56BXT-E/SN require an external pull-up resistor on the DO pin?
No, the 93LC56BXT-E/SN does not require an external pull-up on DO. The DO pin actively drives high/low during Read and Ready/Busy status reporting, and enters High-Z when inactive. However, a 10 kΩ pull-down on CS is recommended per Microchip's design guidance to prevent false start conditions from noise.
What is the maximum clock frequency supported by the 93LC56BXT-E/SN at 3.3 V VCC?
At VCC = 3.3 V (within 2.5–5.5 V range), the 93LC56BXT-E/SN supports a maximum clock frequency of 2 MHz. This is specified in Table 1-2 (A1) for 2.5 V ≤ VCC < 5.5 V. Exceeding this limit risks setup/hold time violations and unreliable instruction execution.
How does the 93LC56BXT-E/SN handle power loss during a write operation?
The 93LC56BXT-E/SN incorporates hardware power-loss protection: if VCC drops below ~1.5 V during erase/write, the internal circuitry aborts the operation and retains pre-write data. Power-on reset logic ensures the device starts in EWDS mode, preventing unintended writes after recovery - a critical feature for automotive systems subject to load-dump or cold-crank events.
Is the 93LC56BXT-E/SN RoHS compliant and lead-free?
Yes, the 93LC56BXT-E/SN is Pb-free and RoHS compliant, with a Matte Tin (Sn) finish on its SOIC-8 (SN) package terminals. This is explicitly stated in the "Features" section of DS21794G and confirmed in the Packaging Information chapter, meeting EU Directive 2011/65/EU requirements.
93LC56BXT-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:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 128 x 16
- 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-SOIC
93LC56BXT-E/SN FAQ
1.How can I place an order for 93LC56BXT-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC56BXT-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 93LC56BXT-E/SN reliable?
The price and inventory of 93LC56BXT-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 93LC56BXT-E/SN is usually 5 days.
3.What payment methods are accepted for 93LC56BXT-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC56BXT-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC56BXT-E/SN?
93LC56BXT-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC56BXT-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 93LC56BXT-E/SN?
For technical support, including 93LC56BXT-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC56BXT-E/SN requirements.
6.How does Aetrix verify that 93LC56BXT-E/SN is sourced from the original manufacturer or authorized distributors?
All 93LC56BXT-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 93LC56BXT-E/SN meets industry standards.
7.What is the process for return or replacement of 93LC56BXT-E/SN?
All 93LC56BXT-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93LC56BXT-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 93LC56BXT-E/SN part is unused and in its original packaging.
Return procedure for 93LC56BXT-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93LC56BXT-E/SN Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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