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Microchip Technology 93LC56AT-I/MNY
- Part No.:
- 93LC56AT-I/MNY
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
93LC56AT-I/MNY.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,598
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Product details
Overview
93LC56AT-I/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, industrial temperature grade (–40°C to +85°C), and Pb-free MSOP-8 package. It features self-timed erase/write cycles, automatic ERAL before WRAL, and Ready/Busy status signaling via DO pin - used in microcontroller-based system configuration storage.
For engineers reviewing the 93LC56AT-I/MNY datasheet, 93LC56AT-I/MNY pinout, 93LC56AT-I/MNY application, or 93LC56AT-I/MNY equivalent, key selection criteria include voltage compatibility (2.5–5.5 V), 8-bit organization (no ORG pin), industrial temp rating, MSOP-8 footprint, and Microwire timing compliance at up to 3 MHz clock frequency.
Technical Context
This device implements a synchronous serial interface using CS, CLK, and DI/DO signals with start-bit detection and opcode-driven command execution. Memory access follows strict Microwire protocol timing: 12-clock READ (20 clocks for x8), 20-clock WRITE, and self-timed 6 ms erase/write cycles with DO-driven Ready/Busy polling.
It integrates power-on/off data protection, EWEN/EWDS write-enable/disable control, and automatic ERAL prior to WRAL. The absence of ORG pin confirms fixed 256 × 8-bit organization, eliminating external configuration logic required by 'C' variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 words × 8 bits) - supports compact configuration storage without external address decoding |
| VCC range | 2.5 V to 5.5 V - compatible with 3.3 V and 5 V logic systems, including mixed-voltage MCU interfaces |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - requires only four MCU GPIOs, no SPI hardware needed |
| Write endurance | 1,000,000 erase/write cycles - suitable for firmware parameter logging with daily updates over >27 years |
| Data retention | >200 years at 25°C - ensures long-term reliability in unpowered storage applications |
| Access time | Max 400 ns DO delay (TPD) at 1.8–2.5 V - enables fast read response in real-time control loops |
| Operating temp | –40°C to +85°C (Industrial grade) - validated for use in automotive body controllers and industrial HMIs |
Pinout & Package
8-pin MSOP (Micro Small Outline Package), 3.0 mm × 3.0 mm body, 0.65 mm pitch, exposed pad (optional VSS connection), RoHS-compliant matte tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-high enable; must be held ≥250 ns low between instructions; initiates self-timed programming on falling edge |
| 2 (CLK) | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcodes, addresses, and data; stoppable mid-sequence |
| 3 (DI) | Data Input | Receives start bit, instruction opcodes, memory addresses, and write data; shares signal path with DO in bus-shared designs |
| 4 (DO) | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z when CS low or during non-read operations |
| 5 (VSS) | Ground | Reference for all I/O and internal circuitry; exposed pad may be connected to VSS for thermal/mechanical stability |
| 6 (NC) | No Connect | Internally unconnected; must be left floating or tied to VSS per layout best practice; not usable as ORG |
| 7 (ORG) | Organization Select | Not present on 93LC56A - pin 7 is NC; confirms fixed 8-bit word size, eliminating external level-setting components |
| 8 (VCC) | Power Supply | 2.5–5.5 V supply; includes internal POR circuit triggered at ~1.5 V; powers internal charge pump for write operations |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | 6 ms typical cycle time with no external timing components - simplifies firmware timing and reduces CPU overhead |
| Automatic ERAL before WRAL | Guarantees full array erase prior to bulk write - prevents partial writes and data corruption without host software intervention |
| Ready/Busy status on DO | Enables polling-based write completion detection - eliminates need for fixed delays or interrupt-driven status monitoring |
| EWEN/EWDS write protection | Hardware-enforced write disable on power-up - prevents accidental overwrites during initialization or brown-out conditions |
| Pb-free MSOP-8 package | 3.0 × 3.0 mm footprint with 0.65 mm pitch - supports high-density PCB layouts and automated SMT assembly |
Applications
| Motor Control Configuration | Smart Sensor Calibration |
|---|---|
Use Scenario: Storing motor commutation tables, PID coefficients, and fault thresholds in BLDC driver modules. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during boot and runtime parameter updates via MCU GPIO bit-banging. Use Value: Enables field-upgradable tuning without firmware reflash; 1M endurance supports >100 recalibrations/year over product lifetime. | Use Scenario: Retaining factory-calibrated offset/gain values and linearization coefficients for MEMS pressure sensors. IC Role / Device Role / Timing Role: Microwire slave device providing persistent calibration data on demand during sensor initialization sequence. Use Value: Eliminates need for external calibration EEPROM; 200-year retention ensures accuracy across product service life. |
| Industrial HMI Settings | Medical Device User Profiles |
Use Scenario: Saving display brightness, language, and alarm thresholds in panel-mounted HMIs operating in harsh environments. IC Role / Device Role / Timing Role: Low-power serial EEPROM interfaced to ARM Cortex-M0+ MCU with 3.3 V I/O and industrial temp requirements. Use Value: MSOP-8 package fits tight board space; –40°C to +85°C rating ensures reliability in factory-floor enclosures. | Use Scenario: Storing clinician-configurable therapy parameters and patient-specific settings in portable infusion pumps. IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration store accessed only during setup mode with EWEN/EWDS enforced write gating. Use Value: Data retention >200 years meets FDA long-term device traceability requirements; RoHS/Pb-free compliance supports global regulatory submissions. |
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/MNY | 128 × 16-bit organization; same VCC, temp, and package - requires 16-bit MCU interface alignment | Used where wider data path reduces transaction count (e.g., FPGA configuration headers) | Select only if system architecture natively supports 16-bit serial transfers and avoids software bit-packing overhead |
| AT25020B-MAHL-T | SPI interface (4-wire), 2 Kbit, 1.8–5.5 V, SOIC-8 - lacks Ready/Busy pin; uses Write Enable latch instead of EWEN/EWDS | Preferred in SPI-native designs with existing SPI peripherals; no DO status polling capability | Choose when migrating from legacy SPI EEPROMs or when MCU has dedicated SPI hardware but no GPIO bit-bang flexibility |
Compared with 93LC56BT-I/MNY, the 93LC56AT-I/MNY provides native 8-bit alignment for byte-oriented MCU firmware; versus AT25020B-MAHL-T, it offers deterministic Ready/Busy signaling and tighter Microwire timing control - critical for resource-constrained 8-bit microcontrollers.
Availability
93LC56AT-I/MNY is available at Aetrix Electronics and suitable for motor control configuration, smart sensor calibration, and industrial HMI settings requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for 93LC56AT-I/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, serving industrial, automotive, and consumer markets globally.
The 93LC56A/B/C series was designed specifically for cost-sensitive, low-power embedded systems requiring reliable nonvolatile storage with minimal pin count and flexible voltage operation - targeting MCU companion memory applications.
FAQ
What is the memory organization of the 93LC56AT-I/MNY?
The 93LC56AT-I/MNY is a fixed 256 × 8-bit (2 Kbit) EEPROM. Unlike 'C' variants, it has no ORG pin - pin 7 is NC - confirming dedicated 8-bit word size. This eliminates external configuration logic and simplifies interface design for byte-addressed MCU firmware.
Does the 93LC56AT-I/MNY support SPI communication?
No, the 93LC56AT-I/MNY uses a Microwire-compatible 3-wire serial interface (CS/CLK/DI/DO), not SPI. It lacks an independent SI/SO pair and requires bit-banged or dedicated Microwire peripheral support. SPI devices like AT25020B require different command structures and lack DO-based Ready/Busy signaling.
What is the maximum clock frequency supported by the 93LC56AT-I/MNY?
The 93LC56AT-I/MNY supports up to 3 MHz clock frequency at VCC ≥ 4.5 V. At 2.5–4.5 V, max clock is 2 MHz; below 2.5 V, it drops to 1 MHz. These limits ensure reliable timing margin for TCKH, TCKL, and data setup/hold windows across voltage and temperature ranges.
How does write protection work on the 93LC56AT-I/MNY?
The 93LC56AT-I/MNY powers up in Erase/Write Disable (EWDS) mode. An EWEN instruction must precede any ERASE or WRITE command. After programming, issuing EWDS re-enables protection. This two-step hardware gating prevents accidental writes during power transitions or firmware errors.
Is the 93LC56AT-I/MNY pin-compatible with other 93LC56x variants in MSOP-8?
Yes - all 93LC56A/B/C variants share identical MSOP-8 pinout (P/N: MNY). However, 93LC56B and 93LC56C differ electrically: B uses fixed 128×16-bit, C adds ORG pin functionality. Swapping A for B/C without firmware changes will cause communication failure due to opcode and data-width mismatches.
93LC56AT-I/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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (2x3)
93LC56AT-I/MNY FAQ
1.How can I place an order for 93LC56AT-I/MNY through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC56AT-I/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-I/MNY reliable?
The price and inventory of 93LC56AT-I/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-I/MNY is usually 5 days.
3.What payment methods are accepted for 93LC56AT-I/MNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC56AT-I/MNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC56AT-I/MNY?
93LC56AT-I/MNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC56AT-I/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-I/MNY?
For technical support, including 93LC56AT-I/MNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC56AT-I/MNY requirements.
6.How does Aetrix verify that 93LC56AT-I/MNY is sourced from the original manufacturer or authorized distributors?
All 93LC56AT-I/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-I/MNY meets industry standards.
7.What is the process for return or replacement of 93LC56AT-I/MNY?
All 93LC56AT-I/MNY units undergo pre-shipment inspection (PSI). If there is an issue with 93LC56AT-I/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-I/MNY part is unused and in its original packaging.
Return procedure for 93LC56AT-I/MNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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