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Microchip Technology 93LC56CXT-I/SN
- Part No.:
- 93LC56CXT-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC56CXT-I/SN.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,058
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Product details
Overview
93LC56CXT-I/SN from Microchip Technology Inc. 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, and industrial temperature grade (–40°C to +85°C). It implements Microwire-compatible 3-wire serial interface (CS/CLK/DI/DO), supports self-timed erase/write cycles, and delivers 1 million endurance cycles with >200 years data retention - used for configuration storage in embedded microcontroller systems.
For engineers reviewing the 93LC56CXT-I/SN datasheet, 93LC56CXT-I/SN pinout, 93LC56CXT-I/SN application, or 93LC56CXT-I/SN equivalent, key selection criteria include ORG-pin-configurable memory width, industrial-grade reliability, micropower standby current (≤5 µA), and compatibility with legacy Microwire host controllers requiring Ready/Busy polling via DO.
Technical Context
The 93LC56CXT-I/SN uses a synchronous 3-wire Microwire interface with start-bit detection, opcode-driven command set (READ/WRITE/ERASE/ERAL/WRAL/EWEN/EWDS), and hardware-based power-on/off data protection. Its ORG pin selects between 128 × 16-bit (ORG = VCC) and 256 × 8-bit (ORG = VSS) memory mapping - both supported within the same physical device.
Internal logic includes an address counter for sequential read, auto-erase-before-write functionality, and a status register accessible only via DO pin polling during programming. The device enters EWDS mode at power-up and requires explicit EWEN before any erase/write operation - preventing accidental overwrites in noisy environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (configurable as 256 × 8-bit or 128 × 16-bit) |
| VCC range | 2.5 V to 5.5 V - enables direct interfacing with 3.3 V and 5 V microcontrollers without level shifters |
| Endurance | 1,000,000 erase/write cycles - supports frequent firmware parameter updates in field-deployed devices |
| Data retention | >200 years at +25°C - ensures long-term configuration integrity in unpowered storage |
| Standby current | ≤5 µA at VCC = 2.5 V - critical for battery-backed real-time clock or sensor node applications |
| Write cycle time | 6 ms typical (TWC) - defines minimum interval between successive write commands |
| Max clock frequency | 3 MHz at VCC ≥4.5 V - sets upper bound on serial transaction throughput |
| Operating temp | –40°C to +85°C (Industrial grade) - validated for use in industrial control panels and automotive body modules |
Pinout & Package
93LC56CXT-I/SN is packaged in an 8-lead SOIC (SN) with 150-mil width, Pb-free Matte Tin finish, and standard pinout compatible with industry-wide PCB footprints for serial EEPROMs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable signal; must be held low ≥250 ns between instructions to reset internal state |
| CLK | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcodes, addresses, and data bits |
| DI | Data Input | Receives start bit, instruction opcodes, memory addresses, and write data; requires no pull-up when shared with DO |
| DO | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters high-impedance state when CS is low |
| VSS | Ground | Reference for all digital and analog circuitry; must be connected directly to system ground plane |
| ORG | Organization select | Logic-high → 128×16-bit mode; logic-low → 256×8-bit mode; must be externally biased, not floating |
| NC | No internal connection | Pin 7 is unconnected silicon; may be left unconnected or tied to ground for mechanical stability |
| VCC | Power supply | Supplies core logic and memory array; internal voltage detector (VPOR ≈1.5 V) prevents operation below safe threshold |
Key Features
| Feature | Design Value |
|---|---|
| ORG-pin configurable word size | Enables single BOM item to serve both 8-bit and 16-bit host interfaces without redesigning layout or firmware |
| Self-timed erase/write with auto-erase | Eliminates need for external timing control or watchdog timeout management in host firmware |
| Automatic ERAL before WRAL | Guarantees full-array write success without requiring separate erase command sequence in application code |
| Ready/Busy status on DO pin | Allows efficient polling instead of fixed-delay waits - reduces average write latency by up to 40% in burst-write scenarios |
| Power-on/off data protection | Hardware lockout below VCC = 1.5 V prevents corruption during brown-out or hot-plug events |
| EWEN/EWDS security commands | Provides software-controlled write-enable gating - essential for bootloader-safe configuration partitioning |
Applications
| Motor Control Configuration | Industrial Sensor Calibration |
|---|---|
Use Scenario: Storing motor commutation tables, PID tuning parameters, and fault log history in BLDC motor drives. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed during boot and runtime via SPI-like Microwire interface. Use Value: Enables field-upgradable motor profiles without reflashing MCU firmware; ORG pin allows reuse across 8-bit legacy and 16-bit optimized drive platforms. | Use Scenario: Retaining factory-calibrated offset/gain coefficients and temperature compensation curves for analog sensor front-ends. IC Role / Device Role / Timing Role: Persistent parameter bank read once at startup and updated only during calibration mode. Use Value: Maintains measurement accuracy over 20+ year product lifetime; 1M endurance supports recalibration every 6 months for 13+ years. |
| Smart Meter Firmware Settings | Automotive Body Control Module |
Use Scenario: Holding tariff schedules, pulse constants, and communication protocol settings in utility meters compliant with ANSI C12.19. IC Role / Device Role / Timing Role: Secure configuration vault with EWEN/EWDS enforcement to prevent unauthorized parameter changes. Use Value: Meets ANSI/IEC tamper-resistance requirements; 2.5–5.5 V operation supports wide-input DC-DC converters in meter power supplies. | Use Scenario: Storing seat position memory, mirror fold/unfold presets, and lighting configuration in automotive BCMs. IC Role / Device Role / Timing Role: Low-power nonvolatile memory accessed infrequently but requiring guaranteed retention across vehicle lifetime. Use Value: Industrial temperature rating (–40°C to +85°C) ensures reliability under hood and cabin extremes; 5 µA standby current minimizes battery drain during vehicle sleep mode. |
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/SN | Dedicated 128×16-bit organization; no ORG pin - fixed 16-bit interface | Requires host controller with native 16-bit serial data path; eliminates ORG biasing circuitry | Select when memory width is fixed and board space permits removal of ORG pull-up/down resistor |
| AT25020B-MAHL-T | SPI interface (4-wire), 2 Kbit, 1.8–5.5 V, 20 MHz max clock - faster but incompatible protocol | Needs SPI-capable MCU GPIO or dedicated SPI peripheral; not Microwire drop-in | Choose for higher throughput where host supports SPI and layout can accommodate extra CS line |
Compared with 93LC56BT-I/SN, the 93LC56CXT-I/SN offers flexible word-width selection without changing hardware; versus AT25020B-MAHL-T, it retains Microwire compatibility for legacy 3-wire designs but trades off maximum speed for protocol simplicity and lower pin count.
Availability
93LC56CXT-I/SN is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, smart metering infrastructure, and embedded sensor nodes requiring stable component supply across extended production lifecycles.
Supply support for 93LC56CXT-I/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, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93LC56CXT-I/SN belongs to Microchip's legacy 93XX serial EEPROM family, designed specifically for cost-sensitive, low-power, nonvolatile storage in resource-constrained embedded systems with Microwire-compatible host controllers.
FAQ
What is the function of the ORG pin on the 93LC56CXT-I/SN?
The ORG pin on the 93LC56CXT-I/SN configures memory organization: tied to VCC it enables 128 × 16-bit mode; tied to VSS it selects 256 × 8-bit mode. This dual-mode capability allows one 93LC56CXT-I/SN part number to serve both 8-bit and 16-bit host systems without redesign. The pin must be externally biased - floating is not permitted - and its state is sampled at the start of each instruction cycle.
Does the 93LC56CXT-I/SN require an external pull-up resistor on the DO pin?
No, the 93LC56CXT-I/SN does not require an external pull-up on the DO pin. DO is actively driven high or low during read/status operations and enters high-impedance state when CS is low or during non-read phases. If DI and DO are wired together (common bus configuration), a series resistor (e.g., 10 kΩ) is recommended to prevent bus conflict during the dummy-zero phase of read commands - but this is not a pull-up requirement.
What is the minimum VCC required for reliable operation of the 93LC56CXT-I/SN?
The 93LC56CXT-I/SN incorporates an internal voltage detector with a typical trip point of 1.5 V (VPOR). Below this threshold, all operations - including reads - are inhibited to prevent data corruption. Therefore, reliable functional operation begins at VCC ≥ 1.5 V, though the specified operating range is 2.5 V to 5.5 V. Operation at 1.8 V is not supported for this 'LC' variant (unlike 'AA' versions).
How does the 93LC56CXT-I/SN indicate readiness after a write operation?
The 93LC56CXT-I/SN indicates readiness after a write operation by driving the DO pin high when CS is brought high after ≥250 ns low time (TCSL). While busy, DO remains low; transition to high confirms completion of the self-timed 6 ms erase/write cycle. This Ready/Busy polling mechanism eliminates need for fixed delays and enables optimal host CPU utilization during programming sequences.
Can the 93LC56CXT-I/SN be used in automotive applications requiring AEC-Q200 qualification?
No, the 93LC56CXT-I/SN carries Industrial (I) temperature grade (–40°C to +85°C) and is not AEC-Q200 qualified. For automotive applications, Microchip offers the 93LC56CEXT-I/SN (E grade, –40°C to +125°C) which meets AEC-Q200 stress testing requirements. The 'E' suffix denotes automotive qualification, while 'I' denotes industrial - both share identical electrical specs but differ in screening, traceability, and reliability validation.
93LC56CXT-I/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, 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-SOIC
93LC56CXT-I/SN FAQ
1.How can I place an order for 93LC56CXT-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC56CXT-I/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 93LC56CXT-I/SN reliable?
The price and inventory of 93LC56CXT-I/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC56CXT-I/SN is usually 5 days.
3.What payment methods are accepted for 93LC56CXT-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC56CXT-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC56CXT-I/SN?
93LC56CXT-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC56CXT-I/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 93LC56CXT-I/SN?
For technical support, including 93LC56CXT-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC56CXT-I/SN requirements.
6.How does Aetrix verify that 93LC56CXT-I/SN is sourced from the original manufacturer or authorized distributors?
All 93LC56CXT-I/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 93LC56CXT-I/SN meets industry standards.
7.What is the process for return or replacement of 93LC56CXT-I/SN?
All 93LC56CXT-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93LC56CXT-I/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 93LC56CXT-I/SN part is unused and in its original packaging.
Return procedure for 93LC56CXT-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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