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Microchip Technology 93LC56AT-E/MS
- Part No.:
- 93LC56AT-E/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
93LC56AT-E/MS.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,938
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Product details
Overview
93LC56AT-E/MS from Microchip Technology Inc. is a 2 Kbit (256 × 8-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, operating from 2.5 V to 5.5 V, rated for automotive temperature range (–40°C to +125°C), and housed in an 8-lead MSOP package. It features self-timed erase/write cycles, automatic ERAL before WRAL, power-on/off data protection, and 1,000,000 endurance cycles - used for parameter storage in automotive body control modules.
For engineers reviewing the 93LC56AT-E/MS datasheet, 93LC56AT-E/MS pinout, 93LC56AT-E/MS application, or 93LC56AT-E/MS equivalent, key selection criteria include its automotive-grade temperature rating, 256 × 8-bit fixed organization (no ORG pin), MSOP-8 footprint compatibility, and Microwire protocol timing compliance at 2.5 V minimum supply.
Technical Context
The 93LC56AT-E/MS implements a synchronous serial Microwire interface with CS, CLK, and DI/DO pins, supporting READ, WRITE, ERASE, ERAL, WRAL, EWEN, and EWDS instructions. Its internal architecture includes an address decoder, mode decode logic, and output buffer, with Ready/Busy status signaled via DO during programming.
It uses CMOS EEPROM technology with on-chip charge pump for write operations, auto-erase prior to write, and power-supply voltage detection (VPOR = 1.5 V typical) for data retention integrity. The device enters Standby mode when CS is low and requires ≥250 ns CS low time between commands.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit organization; no ORG pin - fixed x8 mode) |
| VCC range | 2.5 V to 5.5 V - supports wide-input automotive power rails without external regulation |
| Temperature 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 calibration or fault-log updates over product lifetime |
| Data retention | 200 years at +85°C - ensures long-term reliability in safety-critical nonvolatile storage |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - minimal GPIO usage, compatible with legacy MCU peripherals |
| Write cycle time | 6 ms max (TWC) - deterministic programming latency for real-time firmware coordination |
Pinout & Package
8-lead MSOP (MS) package, 3.0 mm × 3.0 mm × 1.0 mm body, exposed pad optional (VSS or floating), Pb-free Matte Tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; deselects device into Standby mode |
| 2 (CLK) | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcodes, addresses, and data; stoppable mid-cycle |
| 3 (DI) | Data Input | Accepts Start bit, instruction opcodes, addresses, and write data; high-impedance when not selected |
| 4 (DO) | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge |
| 5 (VSS) | Ground | Reference return path for all signals and internal circuitry; connects to exposed pad if used |
| 6 (NC) | No Connection | Internally unconnected; must be left floating or tied to VSS per layout best practice |
| 7 (ORG) | Organization select | Not implemented on 'A' versions - permanently NC; irrelevant for 93LC56AT-E/MS |
| 8 (VCC) | Power Supply | 2.5–5.5 V supply input; includes internal POR circuit (VPOR = 1.5 V typical) for data protection |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control - internal state machine manages auto-erase and programming |
| 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-enforced lockout below VPOR threshold (1.5 V) - prevents inadvertent writes during brown-out or power ramp |
| Ready/Busy polling via DO | Enables non-blocking firmware operation - host reads DO while CS high to detect completion without fixed delays |
| Sequential read mode | Continuous data stream across memory addresses with single CS assertion - reduces transaction overhead for block reads |
Applications
| Instrument Cluster Calibration Storage | Body Control Module Parameter Retention |
|---|---|
Use Scenario: Storing odometer values, trip counters, and display brightness offsets across ignition cycles in automotive instrument clusters. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed via MCU's Microwire peripheral during boot and runtime updates. Use Value: 200-year data retention and automotive temperature rating ensure accuracy over vehicle lifetime without battery backup. | Use Scenario: Holding door lock configuration, window position limits, and mirror memory settings in BCMs. IC Role / Device Role / Timing Role: Dedicated 256-byte configuration store interfaced via GPIO-bit-banged or hardware Microwire controller. Use Value: 1M endurance supports daily reprogramming during service mode; 6 ms write time aligns with human-response UI workflows. |
| Engine Control Unit Trim Data | ADAS Camera Module Settings |
Use Scenario: Saving fuel trim corrections, idle air control offsets, and sensor bias calibrations after engine learning cycles. IC Role / Device Role / Timing Role: Secondary EEPROM co-located with ECU MCU for infrequent but critical calibration persistence. Use Value: Power-loss immunity (VPOR = 1.5 V) prevents corruption during cranking transients; MSOP-8 fits tight PCB space near MCU. | Use Scenario: Storing lens focus profiles, exposure compensation tables, and ROI configurations in automotive camera modules. IC Role / Device Role / Timing Role: Microwire-configurable memory mapped by SoC during initialization and OTA update application. Use Value: Automotive temp grade and Pb-free MSOP package meet AEC-Q100 and RoHS requirements for front-facing vision systems. |
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/MS | 128 × 16-bit organization (x16), same VCC/temp/package - requires host software adaptation for word-aligned access | Used where 16-bit MCU peripherals or denser addressing simplifies firmware; not drop-in for x8 systems | Select only if system architecture natively supports 16-bit serial data framing and address mapping |
| AT25DF021-MAHN-T | SPI interface (4-wire), 2 Mbit density, 2.7–3.6 V supply, industrial temp only (–40°C to +85°C) | Higher density and faster SPI clock (20 MHz) but lacks automotive qualification and Microwire compatibility | Choose for cost-sensitive industrial designs needing larger capacity and higher throughput; not suitable for automotive E-grade requirement |
Compared with 93LC56BT-E/MS and AT25DF021-MAHN-T, the 93LC56AT-E/MS uniquely delivers automotive-grade 256 × 8-bit Microwire EEPROM in MSOP-8 with guaranteed 2.5 V operation - making it the only direct fit for legacy automotive MCU platforms requiring x8 organization and E-temp compliance.
Availability
93LC56AT-E/MS is available at Aetrix Electronics and suitable for automotive body electronics, instrument cluster design, and engine management systems requiring stable component supply across extended production lifecycles.
Supply support for 93LC56AT-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 microcontrollers, analog devices, and memory solutions, headquartered in Chandler, Arizona, serving automotive, industrial, and consumer markets globally.
The 93LC56A/B/C series was designed specifically for low-power, Microwire-compatible nonvolatile storage in resource-constrained embedded systems - emphasizing robustness, wide VCC range, and automotive qualification.
FAQ
What is the memory organization of the 93LC56AT-E/MS?
The 93LC56AT-E/MS has a fixed 256 × 8-bit (2 Kbit) organization. As an 'A' version device, it does not include an ORG pin and operates exclusively in x8 mode - no external configuration is required to set word size. This differs from 'C' variants which use the ORG pin for x8/x16 selection.
Does the 93LC56AT-E/MS support the automotive temperature range?
Yes, the 93LC56AT-E/MS is rated for the automotive temperature range (–40°C to +125°C), indicated by the 'E' suffix in the part number. It meets Microchip's automotive qualification standards and is suitable for under-hood and chassis-mounted applications where thermal stress is significant.
What package type is used for the 93LC56AT-E/MS?
The 93LC56AT-E/MS is packaged in an 8-lead MSOP (Mini Small Outline Package), designated by the 'MS' suffix. Its dimensions are 3.0 mm × 3.0 mm × 1.0 mm with gull-wing leads and an optional exposed pad that may be connected to VSS or left floating per layout guidelines.
How does the 93LC56AT-E/MS handle power-loss during write operations?
The 93LC56AT-E/MS incorporates hardware-based power-loss protection: its internal voltage detector (VPOR = 1.5 V typical) disables all write/erase functions when VCC drops below this threshold. This prevents partial writes and data corruption during brown-out or ignition cycling - a critical feature for automotive EEPROM reliability.
Is the 93LC56AT-E/MS pin-compatible with other members of the 93XX56 family?
Yes, the 93LC56AT-E/MS shares identical pinout and package (MSOP-8) with all 93XX56A/B/C variants in the same package code, including 93LC56BT-E/MS and 93LC56CT-E/MS. However, functional compatibility depends on organization (x8 vs x16) and ORG pin usage - only 'A' versions like the 93LC56AT-E/MS are true pin-and-function matches for x8 systems.
93LC56AT-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:
- 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-MSOP
93LC56AT-E/MS FAQ
1.How can I place an order for 93LC56AT-E/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC56AT-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 93LC56AT-E/MS reliable?
The price and inventory of 93LC56AT-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 93LC56AT-E/MS is usually 5 days.
3.What payment methods are accepted for 93LC56AT-E/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC56AT-E/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC56AT-E/MS?
93LC56AT-E/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC56AT-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 93LC56AT-E/MS?
For technical support, including 93LC56AT-E/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC56AT-E/MS requirements.
6.How does Aetrix verify that 93LC56AT-E/MS is sourced from the original manufacturer or authorized distributors?
All 93LC56AT-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 93LC56AT-E/MS meets industry standards.
7.What is the process for return or replacement of 93LC56AT-E/MS?
All 93LC56AT-E/MS units undergo pre-shipment inspection (PSI). If there is an issue with 93LC56AT-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 93LC56AT-E/MS part is unused and in its original packaging.
Return procedure for 93LC56AT-E/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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