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Microchip Technology 93LC56C-I/MS
- Part No.:
- 93LC56C-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
93LC56C-I/MS.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,464
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Product details
Overview
93LC56C-I/MS from Microchip Technology is a 2 Kbit low-voltage serial EEPROM with configurable 8-/16-bit word organization via the ORG pin, 2.5–5.5 V supply range, -40°C to +85°C industrial temperature grade, and Microwire-compatible 3-wire serial interface. It delivers 1 million erase/write cycles and >200 years data retention for nonvolatile parameter storage in microcontroller-based systems.
For engineers reviewing the 93LC56C-I/MS datasheet, 93LC56C-I/MS pinout, 93LC56C-I/MS application, or 93LC56C-I/MS equivalent, key selection criteria include ORG-pin-configurable memory width, self-timed erase/write with ERAL/WRAL support, Ready/Busy status signaling on DO, and MSOP-8 packaging for space-constrained PCBs.
Technical Context
The 93LC56C-I/MS implements a synchronous 3-wire Microwire interface (CS, CLK, DI/DO) with start-bit detection and opcode-driven command execution. Memory organization is dynamically selected: ORG = VSS enables 256 × 8-bit mode; ORG = VCC enables 128 × 16-bit mode.
It features hardware-level power-on/off data protection, automatic ERAL before WRAL, EWEN/EWDS write-protection control, and Ready/Busy polling via DO pin during self-timed 6 ms erase/write cycles - all operating within 2.5–5.5 V and -40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8 or 128 × 16, selectable via ORG pin) |
| VCC range | 2.5 V to 5.5 V - supports direct connection to 3.3 V or 5 V logic rails without level shifters |
| Endurance | 1,000,000 erase/write cycles - suitable for frequent calibration or configuration updates |
| Data retention | >200 years at 25°C - ensures long-term firmware or serial number persistence |
| Write cycle time | 6 ms max (TWC) - enables deterministic timing budgeting for host MCU firmware |
| Operating temp | -40°C to +85°C (Industrial grade) - validated for embedded industrial control environments |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - minimal GPIO usage, no SPI mode bits required |
Pinout & Package
8-pin MSOP package (3.0 mm × 4.9 mm, 0.65 mm pitch), RoHS-compliant matte tin finish, with exposed pad optionally connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between commands; deselects device into standby (ICCS ≤ 5 µA) |
| CLK | Serial Clock | Synchronizes all data transfers; rising-edge sampling of DI and DO; clock-stoppable during transmission |
| DI | Data Input | Receives start bit, opcodes, addresses, and write data; shares net with DO only with external current-limiting resistor |
| DO | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters high-Z when CS is low or after status read |
| VSS | Ground | Reference for all I/O and internal circuitry; connects to exposed pad in MSOP for thermal relief |
| ORG | Organization select | Logic-high → 128×16 mode; logic-low → 256×8 mode; must be statically biased, not floating |
| NC | No internal connection | Pin 7 in MSOP - unused; may be left unconnected or tied to ground for mechanical stability |
| VCC | Power supply | 2.5–5.5 V input; includes internal POR circuit (VPOR = 1.5 V typical) for data protection during brownout |
Key Features
| Feature | Design Value |
|---|---|
| ORG-pin word-size selection | Enables single BOM part to serve both 8-bit and 16-bit host bus architectures without redesign |
| Self-timed erase/write | Eliminates need for host MCU to manage timing margins - host polls DO for completion instead of fixed delays |
| ERAL before WRAL | Guarantees full-array erase prior to bulk write, preventing stale data corruption in firmware update sequences |
| Ready/Busy status on DO | Allows real-time progress monitoring without dedicated status lines - reduces pin count on resource-limited MCUs |
| Power-on/off data protection | Hardware lockout below VPOR (1.5 V) prevents partial writes during power ramp-up/down transients |
Applications
| Motor Control Configuration | Medical Device Calibration Storage |
|---|---|
Use Scenario: Storing motor winding resistance, PID coefficients, and fault thresholds in industrial servo drives. IC Role / Device Role / Timing Role: Nonvolatile parameter EEPROM interfaced to ARM Cortex-M4 MCU via GPIO-bit-banged Microwire. Use Value: ORG pin set to VSS for 8-bit alignment with MCU's byte-oriented peripheral engine, reducing firmware overhead by 30% vs. 16-bit packing logic. | Use Scenario: Retaining factory-calibrated sensor offsets and patient-specific therapy settings in portable infusion pumps. IC Role / Device Role / Timing Role: Secure configuration store with EWEN/EWDS write-lock sequencing to prevent accidental overwrites during field servicing. Use Value: 200-year data retention ensures calibration validity across product lifetime without battery-backed SRAM maintenance. |
| Automotive Body Control Module | Smart Energy Meter Firmware Patch Store |
Use Scenario: Holding door lock actuator timing profiles and seat position presets in 12 V automotive BCMs. IC Role / Device Role / Timing Role: Industrial-grade EEPROM (I-temp) operating directly from 3.3 V LDO rail; CS toggled by CAN-linked microcontroller. Use Value: -40°C to +85°C rating and 2.5 V min VCC ensure reliable operation during cold cranking and under-hood thermal stress. | Use Scenario: Storing encrypted firmware patch binaries downloaded over PLC or RF mesh networks in utility meters. IC Role / Device Role / Timing Role: High-reliability storage for critical field-upgrade payloads, accessed only during secure boot validation. Use Value: 1M endurance supports 10+ annual firmware updates over 10-year meter deployment without wear-out risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC56B-I/MS | Dedicated 128×16 organization; no ORG pin - fixed 16-bit interface | Requires host to always use 16-bit addressing; no runtime word-width flexibility | Select when system exclusively uses 16-bit data paths and board layout cannot accommodate ORG biasing |
| AT25020B-MAHL-T | SPI interface (4-wire), 2 Kbit, 1.8–5.5 V, same endurance/retention | Needs separate CS, SCK, SI, SO pins; incompatible protocol stack - requires driver rewrite | Select when existing design already uses SPI peripherals and software abstraction layers simplify integration |
Compared with 93LC56B-I/MS, the 93LC56C-I/MS adds runtime organization switching but requires one extra PCB trace; versus AT25020B-MAHL-T, it retains Microwire compatibility for legacy 3-wire designs but lacks SPI daisy-chain capability.
Availability
93LC56C-I/MS is available at Aetrix Electronics and suitable for motor control configuration, medical device calibration storage, and automotive body control modules requiring stable component supply across extended production lifecycles.
Supply support for 93LC56C-I/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, and Flash-IP solutions, serving industrial, automotive, and consumer markets with high-reliability silicon and development tools.
The 93LC56C belongs to Microchip's legacy 93XX serial EEPROM family, designed specifically for cost-sensitive, low-power, nonvolatile memory applications where Microwire compatibility, flexible word width, and robust data integrity are essential.
FAQ
What is the function of the ORG pin on the 93LC56C-I/MS?
The ORG pin on the 93LC56C-I/MS selects memory organization: tied to VCC it configures the device as 128 × 16-bit; tied to VSS it configures as 256 × 8-bit. This allows a single 93LC56C-I/MS part to adapt to either 8-bit or 16-bit host data buses without changing firmware or PCB layout - a key differentiator from fixed-organization variants like the 93LC56A-I/MS or 93LC56B-I/MS.
Does the 93LC56C-I/MS require external pull-up resistors on its I/O lines?
The 93LC56C-I/MS does not require external pull-ups on CS, CLK, or DI for basic operation, as these are active-driven inputs. However, when DI and DO are shorted (shared bus configuration), a current-limiting resistor (typically 10 kΩ) is mandatory between them to prevent bus conflict during the dummy-zero phase of READ operations - a requirement explicitly stated in the DS21794G datasheet Section 2.2.
How does the 93LC56C-I/MS handle power loss during a write cycle?
The 93LC56C-I/MS incorporates hardware power-loss protection: its internal POR circuit disables all write operations when VCC drops below ~1.5 V (typical). This ensures that partial writes never commit corrupted data - the memory contents remain intact or revert to their pre-write state. No external capacitors or supervisory circuits are needed to guarantee this behavior.
Can the 93LC56C-I/MS be used in automotive applications requiring AEC-Q200 qualification?
The 93LC56C-I/MS is rated for Industrial temperature (-40°C to +85°C) and is not AEC-Q200 qualified. For automotive applications, Microchip offers the 93LC56C-E/MS variant (E-temp, -40°C to +125°C), which undergoes additional stress testing and is marked with 'E' in the temperature grade. The 93LC56C-I/MS should only be deployed in non-safety-critical automotive subsystems where full AEC-Q200 compliance is not mandated.
What is the maximum clock frequency supported by the 93LC56C-I/MS at 3.3 V operation?
At VCC = 3.3 V (within the 2.5–5.5 V range), the 93LC56C-I/MS supports a maximum clock frequency of 2 MHz, as specified in Table 1-2 (A1, FCLK) of DS21794G. This is lower than the 3 MHz limit at 4.5–5.5 V, reflecting timing margin derating for reduced supply voltage - a critical constraint for timing-critical host MCU implementations.
93LC56C-I/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 256 x 8, 128 x 16
- Memory Interface:
- Microwire
- Clock Frequency:
- 3 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-MSOP
93LC56C-I/MS FAQ
1.How can I place an order for 93LC56C-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC56C-I/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 93LC56C-I/MS reliable?
The price and inventory of 93LC56C-I/MS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC56C-I/MS is usually 5 days.
3.What payment methods are accepted for 93LC56C-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC56C-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC56C-I/MS?
93LC56C-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC56C-I/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 93LC56C-I/MS?
For technical support, including 93LC56C-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC56C-I/MS requirements.
6.How does Aetrix verify that 93LC56C-I/MS is sourced from the original manufacturer or authorized distributors?
All 93LC56C-I/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 93LC56C-I/MS meets industry standards.
7.What is the process for return or replacement of 93LC56C-I/MS?
All 93LC56C-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 93LC56C-I/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 93LC56C-I/MS part is unused and in its original packaging.
Return procedure for 93LC56C-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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