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Microchip Technology 93LC56AT-E/MNY
- Part No.:
- 93LC56AT-E/MNY
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
93LC56AT-E/MNY.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,886
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Product details
Overview
93LC56AT-E/MNY 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, and automotive-grade temperature operation (−40°C to +125°C). It features self-timed erase/write cycles, automatic ERAL before WRAL, Ready/Busy status signaling via DO pin, and 1,000,000 endurance cycles - used for parameter storage in engine control units and battery management systems.
For engineers reviewing the 93LC56AT-E/MNY datasheet, 93LC56AT-E/MNY pinout, 93LC56AT-E/MNY application, or 93LC56AT-E/MNY equivalent, key selection criteria include its automotive temperature rating, 8-bit fixed organization (no ORG pin), MSOP-8 package, 3-wire serial protocol compatibility, and built-in power-on/off data protection circuitry.
Technical Context
The 93LC56AT-E/MNY implements a synchronous serial Microwire interface with CS, CLK, and DI/DO pins - no ORG pin (fixed 256 × 8-bit organization). Communication requires a start condition (CS high + DI high on first CLK rising edge), followed by opcode, address, and data bits clocked on CLK rising edges.
It uses internal auto-erase-before-write logic and supports ERAL (Erase All) and WRAL (Write All) commands with VCC ≥ 4.5 V. Ready/Busy status is polled via DO pin during programming; DO transitions high only after completion of self-timed TWC = 6 ms erase/write cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit); fixed x8 organization - no external ORG pin required, simplifying PCB layout for 8-bit microcontroller interfaces. |
| VCC range | 2.5 V to 5.5 V - supports direct connection to 3.3 V or 5 V rails without level-shifting in automotive and industrial control modules. |
| Endurance | 1,000,000 erase/write cycles - enables reliable logging of calibration data or fault history over full product lifetime in telematics units. |
| Data retention | 200 years at +25°C - ensures nonvolatile storage integrity across vehicle service life without refresh. |
| Operating temp | −40°C to +125°C (Automotive E grade) - qualified for under-hood and powertrain applications per AEC-Q100 stress requirements. |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - interoperable with legacy PIC® MCU peripherals and reduces GPIO count vs. SPI/I²C. |
| Write cycle time | 6 ms typical (TWC) - deterministic timing allows precise host software timeout handling without polling overhead. |
Pinout & Package
93LC56AT-E/MNY is housed in an 8-lead MSOP (Micro Small Outline Package) with 0.65 mm pitch, body size 3.0 × 3.0 mm, and exposed pad (optional VSS connection). Pin 1 marked by laser dot; pin 1 corner located at top-left when notch faces up.
| 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 (ICCS ≤ 5 µA). |
| 2 (CLK) | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcode/address/data; stoppable mid-sequence without corruption. |
| 3 (DI) | Data Input | Accepts start bit, instruction opcodes, addresses, and write data; tied high at power-up to detect start condition. |
| 4 (DO) | Data Output / Status | Outputs read data or Ready/Busy signal (low = busy); enters High-Z when CS low or during WRAL/ERAL. |
| 5 (VSS) | Ground | Reference for all I/O and internal logic; exposed pad may be connected to PCB ground plane for thermal and noise performance. |
| 6 (NC) | No Connect | Internally unconnected; must be left floating or tied to VSS - not usable as strap or control pin. |
| 7 (NC) | No Connect | Internally unconnected; identical treatment as Pin 6 - no functional role in 93LC56A variant. |
| 8 (VCC) | Power Supply | 2.5–5.5 V supply; includes internal POR circuit (VPOR = 1.5 V typ.) for automatic data protection during brown-out. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control - host MCU only waits for DO high or uses fixed 6 ms timeout. |
| Automatic ERAL before WRAL | Guarantees clean memory array prior to bulk write; removes requirement for separate erase command in firmware. |
| Power-on/off data protection | Hardware-enforced lockout below VPOR = 1.5 V prevents accidental writes during power ramp-up/down. |
| Ready/Busy status via DO | Enables efficient polling without additional status lines - reduces pin count and simplifies interface to resource-constrained MCUs. |
| Pb-free & RoHS compliant | Matte tin finish meets automotive environmental compliance requirements and eliminates lead-based solder concerns. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Storing trim values for fuel injection timing and knock sensor calibration across vehicle lifetime. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with guaranteed 200-year retention and 1M-cycle endurance under thermal cycling. Use Value: Eliminates need for periodic recalibration; maintains OEM-specified performance despite 125°C under-hood ambient exposure. | Use Scenario: Retaining camera lens focus offsets and radar module compensation coefficients after ignition cycle. IC Role / Device Role / Timing Role: Automotive-grade EEPROM interfaced directly to ADAS SoC's Microwire peripheral for fast configuration reload. Use Value: Enables sub-100 ms system boot with valid sensor parameters - critical for ISO 26262 ASIL-B startup timing compliance. |
| Battery Management System (BMS) | Industrial Motor Drive Controller |
Use Scenario: Logging cell voltage imbalance history and thermal derating thresholds for lithium-ion packs. IC Role / Device Role / Timing Role: High-reliability data logger operating at −40°C to +125°C with immunity to voltage transients on 12 V rail. Use Value: Supports predictive maintenance algorithms using field-collected degradation data without SRAM backup capacitor. | Use Scenario: Holding motor commutation angle lookup tables and current-sense offset corrections across power cycles. IC Role / Device Role / Timing Role: Parameter storage accessible via 3-wire interface from ARM Cortex-M4F controller with minimal GPIO usage. Use Value: Reduces BOM cost vs. SPI EEPROM; avoids I²C bus contention in multi-master drive architectures. |
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/MNY | 128 × 16-bit organization; same package, voltage, temp grade - requires 16-bit MCU interface alignment. | Used where firmware handles 16-bit word access natively (e.g., DSP-based motor control); incompatible with 8-bit byte-oriented protocols. | Select only if system architecture mandates 16-bit word addressing and eliminates need for software bit-packing. |
| AT25DF041A-SH-T | 4 Mbit SPI NOR Flash; quad I/O capable; no built-in erase/write timing - requires external command sequencing. | Higher density for firmware patch storage; lacks automatic ERAL/WRAL and hardware data protection during brown-out. | Choose for code storage or large log buffers; avoid for critical calibration storage requiring guaranteed atomicity and POR safety. |
Compared with 93LC56BT-E/MNY, the 93LC56AT-E/MNY provides native 8-bit access and simpler firmware integration; versus AT25DF041A-SH-T, it delivers deterministic 6 ms writes, hardware-enabled data protection, and lower power consumption in standby - essential for always-on automotive subsystems.
Availability
93LC56AT-E/MNY is available at Aetrix Electronics and suitable for engine control units, battery management systems, and ADAS modules requiring stable component supply with automotive-grade qualification and long-term lifecycle support.
Supply support for 93LC56AT-E/MNY 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 93LCxx family was designed specifically for cost-sensitive, low-power, nonvolatile memory applications in automotive, industrial, and consumer systems requiring robust serial EEPROM functionality with Microwire compatibility.
FAQ
What is the memory organization of the 93LC56AT-E/MNY?
The 93LC56AT-E/MNY has a fixed 256 × 8-bit organization - it is an 'A' version device with no ORG pin. This means it always operates in x8 mode, accepting 8-bit data words and requiring 8-bit address fields (A7–A0), simplifying integration with 8-bit microcontrollers and eliminating external configuration logic.
Does the 93LC56AT-E/MNY require an external pull-up resistor on the DO pin?
No, the 93LC56AT-E/MNY does not require an external pull-up on DO. The DO pin actively drives high/low during read or Ready/Busy status reporting and enters High-Z when CS is low or during WRAL/ERAL. A pull-up is unnecessary and may interfere with correct status detection or cause bus conflicts.
Can the 93LC56AT-E/MNY be used in a 5 V system?
Yes, the 93LC56AT-E/MNY supports VCC from 2.5 V to 5.5 V, making it fully compatible with 5 V logic systems. Its VIH1 threshold is 2.0 V (min) at VCC ≥ 2.7 V, ensuring reliable recognition of 5 V CMOS logic highs without level translation.
What is the purpose of the NC pins on the 93LC56AT-E/MNY MSOP-8 package?
Pins 6 and 7 on the 93LC56AT-E/MNY are No Connect (NC) terminals - internally unconnected and functionally inert. They must be left floating or tied to VSS per Microchip recommendations; routing signals or applying voltage to them may cause undefined behavior or damage.
How does the 93LC56AT-E/MNY protect against inadvertent writes during power-up?
The 93LC56AT-E/MNY incorporates hardware power-on reset (POR) circuitry that inhibits all write operations until VCC rises above VPOR ≈ 1.5 V. Additionally, it powers up in EWDS (Erase/Write Disable) mode, requiring an explicit EWEN command before any ERASE or WRITE instruction executes - providing dual-layer protection against spurious writes.
93LC56AT-E/MNY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- 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-TDFN (2x3)
93LC56AT-E/MNY FAQ
1.How can I place an order for 93LC56AT-E/MNY through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC56AT-E/MNY 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/MNY reliable?
The price and inventory of 93LC56AT-E/MNY 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/MNY is usually 5 days.
3.What payment methods are accepted for 93LC56AT-E/MNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC56AT-E/MNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC56AT-E/MNY?
93LC56AT-E/MNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC56AT-E/MNY 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/MNY?
For technical support, including 93LC56AT-E/MNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC56AT-E/MNY requirements.
6.How does Aetrix verify that 93LC56AT-E/MNY is sourced from the original manufacturer or authorized distributors?
All 93LC56AT-E/MNY 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/MNY meets industry standards.
7.What is the process for return or replacement of 93LC56AT-E/MNY?
All 93LC56AT-E/MNY units undergo pre-shipment inspection (PSI). If there is an issue with 93LC56AT-E/MNY, 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/MNY part is unused and in its original packaging.
Return procedure for 93LC56AT-E/MNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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