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Microchip Technology 93LC56AXT-E/SN
- Part No.:
- 93LC56AXT-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC56AXT-E/SN.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,990
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Product details
Overview
93LC56AXT-E/SN from Microchip Technology Inc. is a 2 Kbit low-voltage serial EEPROM with 256 × 8-bit organization, automotive-grade temperature range (−40°C to +125°C), 2.5–5.5 V supply voltage, and Microwire-compatible 3-wire serial interface. It features self-timed erase/write cycles, automatic ERAL before WRAL, and power-on/off data protection - used for parameter storage in automotive body control modules.
For engineers reviewing the 93LC56AXT-E/SN datasheet, 93LC56AXT-E/SN pinout, 93LC56AXT-E/SN application, or 93LC56AXT-E/SN equivalent, key selection criteria include automotive temperature qualification, 8-bit fixed-word organization (no ORG pin), SOIC-8 package compatibility, and support for sequential read and Ready/Busy polling via DO pin.
Technical Context
This device implements a synchronous 3-wire Microwire interface with CS, CLK, and DI/DO pins. It uses internal auto-erase before write, supports ERAL and WRAL commands, and provides Ready/Busy status via DO pin during programming - all without external timing components.
It operates in EWEN/EWDS security mode: powers up in EWDS (write-disabled), requires explicit EWEN before any erase/write, and supports high-impedance DO output with status polling after TCSL ≥250 ns. Memory array is organized as 256 words × 8 bits, with no ORG pin (dedicated x8 mode).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit organization; fixed x8, no ORG pin) |
| Supply voltage | 2.5 V to 5.5 V - supports wide-range automotive rail operation |
| Temperature grade | Automotive (E): −40°C to +125°C - qualified for under-hood and chassis applications |
| Endurance | 1,000,000 erase/write cycles - enables long-term field calibration storage |
| Data retention | 200 years at +25°C - ensures firmware parameter integrity over vehicle lifetime |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - minimal GPIO usage on microcontrollers |
| Write cycle time | 6 ms typical (TWC) - deterministic programming latency for real-time systems |
Pinout & Package
8-pin SOIC package (SN suffix), Pb-free Matte Tin finish, 150 mil width. Pin 1 marked by laser dot; pin 1 = CS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; initiates self-timed write on falling edge |
| 2 (CLK) | Serial Clock | Synchronizes opcode/address/data transfer on rising edge; stoppable at any point |
| 3 (DI) | Data Input | Accepts Start bit, opcodes (e.g., 01 for WRITE), addresses, and data; no pull-up required |
| 4 (DO) | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS fall; requires TCSL ≥250 ns to poll status |
| 5 (VSS) | Ground | Reference for all I/O and internal logic; must be low-impedance connection |
| 6 (NC) | No Connect | Internally unconnected; must be left floating or tied to VSS per layout best practice |
| 7 (NC) | No Connect | Internally unconnected; same handling as Pin 6 |
| 8 (VCC) | Power Supply | 2.5–5.5 V input; includes internal POR circuitry triggering at ~1.5 V |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control; 6 ms typical cycle completes autonomously after CS fall |
| Automatic ERAL before WRAL | Ensures full-array readiness before bulk write - prevents partial-write corruption without host software intervention |
| Power-on/off data protection | Hardware-level inhibition below ~1.5 V VCC - prevents inadvertent writes during brown-out or power ramp |
| Ready/Busy polling via DO | Enables non-blocking firmware design: host checks DO after CS high pulse instead of fixed delays |
| Sequential read mode | Continuous data stream across addresses with single CS assertion - reduces transaction overhead for block reads |
Applications
| Automotive Body Control Unit | Industrial Sensor Calibration Storage |
|---|---|
Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in a vehicle BCM. IC Role / Device Role / Timing Role: Nonvolatile parameter EEPROM interfaced to an 8-bit MCU via Microwire; accessed during power-up and user adjustment events. Use Value: Automotive temperature rating (−40°C to +125°C) and 200-year data retention ensure settings survive vehicle lifetime and extreme environmental exposure. | Use Scenario: Retaining factory-calibrated offset/gain coefficients for analog sensor front-ends in industrial PLC modules. IC Role / Device Role / Timing Role: Dedicated configuration memory mapped to MCU's SPI-like peripheral; written once during production test, read at boot. Use Value: 1M endurance allows re-calibration in field service; 2.5 V min VCC supports operation with low-dropout regulators in power-constrained nodes. |
| Medical Infusion Pump Settings | Smart Energy Meter Firmware Parameters |
Use Scenario: Holding dose limits, alarm thresholds, and user preferences in battery-backed medical devices. IC Role / Device Role / Timing Role: Safety-critical configuration store accessed only during initialization or maintenance mode; isolated from main application logic. Use Value: Hardware write-protection (EWDS default on power-up) prevents accidental overwrite during runtime; RoHS/Pb-free compliance meets medical regulatory requirements. | Use Scenario: Storing tariff tables, metering constants, and communication keys in utility-grade smart meters. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory for cryptographic keys and billing parameters; accessed via isolated secure MCU subsystem. Use Value: 6 ms write time enables fast firmware updates; 5.5 V max VCC accommodates transient surges on AC-powered meter rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC56BT-E/SN | 128 × 16-bit organization; same VCC range, temp grade, and package | Requires 16-bit MCU interface alignment; not drop-in compatible with 8-bit data paths | Select only if system architecture mandates 16-bit word access and address space efficiency |
| AT25020B-MAHL-T | 2 Kbit SPI interface (4-wire), 1.8–5.5 V, industrial temp only (−40°C to +85°C) | Lacks automotive qualification; uses separate SI/SO pins instead of shared DI/DO | Use where SPI is preferred and automotive temp is not required; verify layout compatibility with 8-pin SOIC footprint |
Compared with 93LC56AXT-E/SN, the 93LC56BT-E/SN offers higher density per address but demands 16-bit bus handling, while AT25020B-MAHL-T provides SPI flexibility at the cost of automotive qualification and pinout divergence.
Availability
93LC56AXT-E/SN is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor calibration, and medical device parameter storage requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 93LC56AXT-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.
The 93LC56A series belongs to Microchip's legacy Microwire-compatible EEPROM product line, designed specifically for cost-sensitive, low-power, and automotive-qualified nonvolatile memory applications where minimal pin count and proven reliability are critical.
FAQ
What is the memory organization of the 93LC56AXT-E/SN?
The 93LC56AXT-E/SN has a fixed 256 × 8-bit organization (x8 mode). It does not include an ORG pin - unlike 'C' variants - so word size is permanently set to 8 bits. This eliminates external configuration logic and simplifies interface design for 8-bit microcontrollers. The 93LC56AXT-E/SN stores 2 Kbit total, accessible as 256 individual bytes.
Does the 93LC56AXT-E/SN support automotive temperature range?
Yes, the 93LC56AXT-E/SN is rated for the automotive temperature range of −40°C to +125°C (E grade). This qualification is explicitly confirmed in the Device Selection Table and Electrical Characteristics section of DS21794G. Its 2.5–5.5 V VCC range and internal power-on reset threshold (~1.5 V) further support robust operation in automotive electrical environments.
How does write protection work on the 93LC56AXT-E/SN?
The 93LC56AXT-E/SN powers up in Erase/Write Disable (EWDS) mode. An explicit EWEN instruction must be issued before any ERASE or WRITE command executes. After programming, issuing EWDS restores protection. This two-step hardware-enforced mechanism prevents accidental overwrites during noise events or firmware errors - a critical feature for automotive and medical applications using the 93LC56AXT-E/SN.
What package type is used for the 93LC56AXT-E/SN?
93LC56AXT-E/SN uses an 8-pin SOIC package with 150-mil width and Pb-free Matte Tin finish ('SN' suffix). Pin 1 is identified by a laser mark. This package is compatible with standard SOIC-8 footprints and reflow profiles, and is listed in the Device Selection Table under 'Packages' for 93LC56A variants.
Can the 93LC56AXT-E/SN perform sequential reads?
Yes, the 93LC56AXT-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 block reads without retransmitting opcodes or addresses - reducing transaction overhead in firmware that retrieves multiple configuration bytes.
93LC56AXT-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:
- 256 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-SOIC
93LC56AXT-E/SN FAQ
1.How can I place an order for 93LC56AXT-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC56AXT-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 93LC56AXT-E/SN reliable?
The price and inventory of 93LC56AXT-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 93LC56AXT-E/SN is usually 5 days.
3.What payment methods are accepted for 93LC56AXT-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC56AXT-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC56AXT-E/SN?
93LC56AXT-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC56AXT-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 93LC56AXT-E/SN?
For technical support, including 93LC56AXT-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC56AXT-E/SN requirements.
6.How does Aetrix verify that 93LC56AXT-E/SN is sourced from the original manufacturer or authorized distributors?
All 93LC56AXT-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 93LC56AXT-E/SN meets industry standards.
7.What is the process for return or replacement of 93LC56AXT-E/SN?
All 93LC56AXT-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93LC56AXT-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 93LC56AXT-E/SN part is unused and in its original packaging.
Return procedure for 93LC56AXT-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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