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Microchip Technology 93LC56BX-E/SN
- Part No.:
- 93LC56BX-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC56BX-E/SN.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,617
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Product details
Overview
93LC56BX-E/SN from Microchip Technology Inc. is a 2 Kbit (256 × 8-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 2.5–5.5 V supply range, -40°C to +125°C automotive temperature grade, and 1 million erase/write cycles. It serves as nonvolatile configuration storage in engine control units, sensor calibration modules, and automotive infotainment systems.
For engineers reviewing the 93LC56BX-E/SN datasheet, 93LC56BX-E/SN pinout, 93LC56BX-E/SN application, or 93LC56BX-E/SN equivalent, key selection criteria include its automotive-grade temperature support, dedicated 8-bit organization (no ORG pin), self-timed write/erase, Ready/Busy status signaling, and Pb-free SOIC-8 packaging.
Technical Context
This device implements a synchronous serial Microwire interface with CS, CLK, and DI/DO pins - no ORG pin present ('X' suffix confirms A-version 8-bit fixed organization). Communication uses start-bit detection followed by opcode, address, and data clocked on rising CLK edges; DO provides both read data and real-time Ready/Busy status during programming.
It features hardware-level power-on/off data protection, automatic ERAL before WRAL, EWEN/EWDS command-based write enable/disable, and sequential read capability. All operations are self-timed: typical write cycle time is 6 ms, with no external timing components required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit) - fixed x8 organization; no ORG pin; supports byte-level addressing |
| VCC range | 2.5 V to 5.5 V - compatible with 3.3 V and 5 V logic domains; POR threshold at 1.5 V |
| Temperature grade | Automotive (E): -40°C to +125°C - qualified for under-hood and safety-critical ECUs |
| Endurance | 1,000,000 erase/write cycles - enables frequent calibration updates over vehicle lifetime |
| Data retention | >200 years at +25°C - ensures long-term reliability without refresh |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - minimal GPIO usage; no I²C or SPI overhead |
| Write cycle time | 6 ms typical - deterministic timing for system-level timeout handling |
Pinout & Package
Package: 8-lead SOIC (SN), Pb-free Matte Tin finish, body size 3.9 mm × 4.9 mm, standard JEDEC MS-012AA footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; deselects device into standby but completes ongoing write |
| CLK (Pin 2) | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcode/address/data and clocks out read data/status |
| DI (Pin 3) | Data Input | Receives start bit, instruction opcodes, addresses, and write data; high impedance when not selected |
| DO (Pin 4) | Data Output / Status | Outputs read data and Ready/Busy status (low = busy); enters High-Z on CS falling edge |
| VSS (Pin 5) | Ground | Reference for all digital and analog circuitry; requires low-impedance connection to system GND plane |
| NC (Pin 6) | No Connect | Internally unconnected; must remain floating or tied to GND per layout best practice |
| NC (Pin 7) | No Connect | Internally unconnected; no routing or loading required |
| VCC (Pin 8) | Power Supply | 2.5–5.5 V supply; decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control or polling delays beyond TWC (6 ms max); simplifies firmware integration |
| Ready/Busy status on DO | Enables real-time polling without additional pins; avoids fixed delay assumptions in safety-critical boot sequences |
| Power-on/off data protection | Hardware lockout below 1.5 V VCC prevents corruption during brown-out or hot-swap events |
| EWEN/EWDS command security | Requires explicit enable before each write; prevents accidental overwrites during noise or reset glitches |
| Sequential read mode | Reduces host CPU overhead by auto-incrementing address on consecutive reads while CS remains high |
Applications
| Engine Control Unit (ECU) Trim Storage | Automotive Sensor Calibration Data |
|---|---|
Use Scenario: Storing fuel injection timing offsets, idle air control trims, and knock sensor thresholds that require field updates across vehicle lifetime. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding critical runtime parameters; accessed during ECU boot and periodic recalibration. Use Value: 1M endurance supports >10,000 dealer reprogramming events; automotive temp grade ensures operation at 125°C under hood. | Use Scenario: Retaining factory-calibrated gain/offset values for pressure, temperature, and oxygen sensors in ADAS modules. IC Role / Device Role / Timing Role: Dedicated calibration memory mapped via microcontroller's serial peripheral; read once per sensor initialization. Use Value: >200-year data retention guarantees accuracy over full vehicle service life without backup power or refresh. |
| Infotainment System UI Settings | Body Control Module (BCM) Configuration |
Use Scenario: Saving user preferences (volume, display brightness, language) across ignition cycles in head unit firmware. IC Role / Device Role / Timing Role: Low-power serial EEPROM interfaced to ARM Cortex-M MCU via GPIO-banged Microwire. Use Value: 2.5 V min VCC enables direct connection to 3.3 V domain; 1 µA standby current extends battery backup runtime. | Use Scenario: Storing door lock logic, lighting profiles, and window auto-up/down settings in BCM firmware. IC Role / Device Role / Timing Role: Configuration store accessed during BCM power-up and CAN message processing. Use Value: SOIC-8 package fits constrained PCB space; Pb-free compliance meets automotive RoHS requirements. |
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 grade (-40°C to +85°C); identical 256×8-bit organization, SOIC-8 package, and electrical specs | Not qualified for under-hood automotive use; suitable for cabin electronics or industrial controls | Select only if ambient operating temperature stays ≤85°C and AEC-Q200 qualification is not required |
| AT25020B-MAHL-T | SPI interface (4-wire), 2 Kbit (256×8), 1.8–5.5 V, industrial temp; no Ready/Busy pin - relies on WIP flag polling | Requires different driver stack; lacks DO-based status signaling; no automotive qualification | Choose only if migrating to SPI architecture and accepting software-based busy-wait overhead |
Compared with 93LC56BT-I/SN and AT25020B-MAHL-T, the 93LC56BX-E/SN uniquely delivers automotive temperature qualification, hardware Ready/Busy signaling on DO, and Microwire compatibility - enabling robust, low-overhead configuration storage in safety-relevant ECUs without protocol translation or thermal derating.
Availability
93LC56BX-E/SN is available at Aetrix Electronics and suitable for automotive control units, sensor calibration modules, infotainment systems, and body electronics requiring stable component supply across extended product lifecycles.
Supply support for 93LC56BX-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 devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93LC56X series belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-power, nonvolatile storage in automotive, industrial, and consumer applications where Microwire interface simplicity and reliability are prioritized.
FAQ
What is the memory organization of the 93LC56BX-E/SN?
The 93LC56BX-E/SN is a fixed 256 × 8-bit (2 Kbit) organization device. The 'X' in the part number denotes the A-version, meaning it has no ORG pin and operates exclusively in x8 mode - no external logic or voltage level is needed to configure word size. This eliminates configuration errors in automotive environments where pin count and routing simplicity are critical.
Does the 93LC56BX-E/SN support sequential read operation?
Yes, the 93LC56BX-E/SN supports sequential read: when CS remains high after a READ instruction, the internal address counter automatically increments, allowing continuous output of consecutive memory bytes on DO with each CLK rising edge. This reduces host processor overhead during bulk configuration reads in ECUs and sensor modules.
What is the purpose of the EWEN and EWDS commands in the 93LC56BX-E/SN?
The 93LC56BX-E/SN powers up in EWDS (Erase/Write Disable) state. An EWEN command must precede any ERASE or WRITE operation to enable programming; EWDS restores protection afterward. These commands prevent accidental writes during power transients or noise events - a critical safeguard in automotive systems where unintended memory corruption could impact functional safety.
Is the 93LC56BX-E/SN pin-compatible with other 93LC56 variants in SOIC-8 package?
Yes, the 93LC56BX-E/SN shares identical SOIC-8 pinout and electrical characteristics with 93LC56A/B/C variants in SN package (e.g., 93LC56AT-I/SN, 93LC56CT-E/SN), except that 'B' versions are 128×16-bit and 'C' versions include an ORG pin. Pin-to-pin compatibility allows drop-in replacement for A-version parts, provided memory organization and temperature grade match system requirements.
How does the Ready/Busy status function on the DO pin of the 93LC56BX-E/SN?
During an erase or write cycle, the DO pin of the 93LC56BX-E/SN outputs Ready/Busy status: logic low indicates ongoing programming, logic high signals completion. To sample this, CS must be brought high for ≥250 ns after the instruction - DO then reflects status until next CS low. This hardware signaling eliminates need for fixed software delays, improving system responsiveness and determinism in real-time automotive firmware.
93LC56BX-E/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
93LC56BX-E/SN FAQ
1.How can I place an order for 93LC56BX-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC56BX-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 93LC56BX-E/SN reliable?
The price and inventory of 93LC56BX-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 93LC56BX-E/SN is usually 5 days.
3.What payment methods are accepted for 93LC56BX-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC56BX-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC56BX-E/SN?
93LC56BX-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC56BX-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 93LC56BX-E/SN?
For technical support, including 93LC56BX-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC56BX-E/SN requirements.
6.How does Aetrix verify that 93LC56BX-E/SN is sourced from the original manufacturer or authorized distributors?
All 93LC56BX-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 93LC56BX-E/SN meets industry standards.
7.What is the process for return or replacement of 93LC56BX-E/SN?
All 93LC56BX-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93LC56BX-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 93LC56BX-E/SN part is unused and in its original packaging.
Return procedure for 93LC56BX-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93LC56BX-E/SN Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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