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Microchip Technology 93LC56BX-I/SN
- Part No.:
- 93LC56BX-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC56BX-I/SN.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,591
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Product details
Overview
93LC56BX-I/SN from Microchip Technology Inc. is a 2 Kbit low-voltage serial EEPROM with 128 × 16-bit organization, industrial temperature range (–40°C to +85°C), 2.5–5.5 V supply, and Microwire-compatible 3-wire serial interface. It supports self-timed erase/write cycles, automatic ERAL before WRAL, and Ready/Busy status via DO pin - used for firmware parameter storage in embedded microcontroller systems.
For engineers reviewing the 93LC56BX-I/SN datasheet, 93LC56BX-I/SN pinout, 93LC56BX-I/SN application, or 93LC56BX-I/SN equivalent, key selection criteria include its dedicated 16-bit word size (no ORG pin), SOIC-8 package, 1 million erase/write endurance, 200-year data retention, and compatibility with legacy Microwire controllers requiring x16 addressing.
Technical Context
The 93LC56BX-I/SN implements a synchronous serial Microwire interface with CS, CLK, and DI/DO pins. It uses a fixed 128 × 16-bit memory array with no ORG pin - unlike 'C' variants - eliminating external configuration logic. All instructions (READ, WRITE, ERASE, ERAL, WRAL, EWEN/EWDS) are executed via 12-clock-cycle sequences for x16 mode.
Power-on data protection is enforced by internal voltage detection (VPOR = 1.5 V typical); write operations require prior EWEN command and are inhibited below VCC threshold. Standby current is ≤1 µA at 25°C, and programming cycles complete autonomously without host clocking after CS fall (for 93LC devices).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (128 words × 16 bits) - fixed x16 organization; no ORG pin required |
| VCC Range | 2.5 V to 5.5 V - supports wide-range industrial power rails including 3.3 V and 5 V systems |
| Endurance | 1,000,000 erase/write cycles - enables frequent calibration or logging updates in field-deployed devices |
| Data Retention | 200 years at 25°C - ensures long-term reliability for unattended equipment and firmware storage |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - interoperable with legacy PIC® MCU peripherals and discrete shift-register controllers |
| Access Time | Max 400 ns DO delay (TPD) at 1.8–2.5 V - meets timing budgets for sub-1 MHz controller clock domains |
| Write Cycle Time | 6 ms typical (TWC) - defines minimum inter-write interval; no host polling needed after CS deassertion |
Pinout & Package
93LC56BX-I/SN is supplied in an 8-lead SOIC package (SN suffix), with standard pinout matching industry Microwire EEPROMs. The device has no ORG pin - confirming fixed 16-bit word size per the 'B' variant designation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; initiates self-timed write on falling edge |
| CLK (Pin 2) | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcode/address/data; stoppable mid-sequence |
| DI (Pin 3) | Data Input | Receives Start bit, instruction opcodes, addresses, and write data; shares net with DO only with series resistor |
| DO (Pin 4) | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS fall; requires TCSL ≥250 ns to sample status |
| VSS (Pin 5) | Ground | Reference for all I/O and internal logic; must be low-impedance connection for reliable timing |
| NC (Pin 6) | No Connect | Internally unconnected; must be left floating or tied to VSS per layout best practice |
| VCC (Pin 8) | Power Supply | 2.5–5.5 V input; includes on-chip POR circuitry (trip point ~1.5 V) for automatic write inhibition during brownout |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed Erase/Write | Eliminates need for external timing control or software delays - host asserts CS low and proceeds to next operation after TWC (6 ms) |
| Automatic ERAL before WRAL | Guarantees full-array erase prior to bulk write, preventing partial-data corruption without explicit ERAL command |
| Power-On/Off Data Protection | Hardware-enforced write disable below VCC = 1.5 V typical - prevents inadvertent writes during power ramp-up/down |
| Ready/Busy Status via DO | Enables efficient polling instead of fixed-delay waits; reduces average write latency in interrupt-driven firmware |
| Sequential Read Mode | Allows continuous address increment with CS held high - simplifies firmware for block reads (e.g., configuration tables) |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-trimmed sensor gain/offset coefficients and user-adjusted calibration values in portable gas analyzers. IC Role / Device Role / Timing Role: Nonvolatile parameter store interfaced to an 8-bit MCU via Microwire; accessed during boot and field recalibration. Use Value: 200-year data retention ensures calibration integrity across product lifetime; 1M endurance supports daily recalibration over 27 years. | Use Scenario: Holding patient-specific therapy settings and device serialization data in battery-powered infusion pumps. IC Role / Device Role / Timing Role: Secure, low-power configuration memory accessed during startup and mode changes; isolated from main processor bus. Use Value: 2.5 V minimum VCC allows direct connection to Li-ion battery (2.7–4.2 V); <1 µA standby current extends battery life. |
| Automotive Body Control Module | Consumer Appliance Firmware Storage |
Use Scenario: Saving seat/mirror position presets and lighting profiles in 12 V automotive BCMs with 3.3 V LDO regulation. IC Role / Device Role / Timing Role: Dedicated x16 EEPROM for fast access to multi-byte configuration records; co-located with MCU on same PCB. Use Value: Industrial temp rating (–40°C to +85°C) covers under-hood ambient; SOIC-8 footprint enables compact, reflow-solderable design. | Use Scenario: Storing UI language selection, energy mode preferences, and usage counters in smart washing machines. IC Role / Device Role / Timing Role: Serial configuration memory shared across multiple MCU subsystems using simple GPIO bit-banged Microwire. Use Value: Microwire compatibility avoids dedicated SPI hardware; 5.5 V max VCC tolerates 5 V rail noise without level-shifting. |
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 | Same 128×16-bit organization, identical SOIC-8 package and pinout, but marked 'T' (tape-and-reel) vs 'X' (tube); electrically identical | No functional difference; 'X' denotes tube packaging for prototyping and low-volume use | Select 93LC56BX-I/SN for hand-soldered evaluation or small-batch builds where tube packaging is preferred |
| AT25020B-MAHL-T | 2 Kbit SPI EEPROM (256×8), 1.8–5.5 V, SOIC-8, but uses 4-wire SPI (not Microwire); no Ready/Busy pin - relies on WIP flag polling | Requires SPI peripheral or bit-banged software driver; lacks DO-based status signal for deterministic timing | Choose only if migrating to SPI architecture; not drop-in compatible due to protocol and status interface differences |
Compared with 93LC56BT-I/SN, the 93LC56BX-I/SN offers identical electrical and functional behavior with tube packaging convenience; versus AT25020B-MAHL-T, it preserves Microwire timing predictability and hardware-ready/busy signaling critical for real-time embedded control loops.
Availability
93LC56BX-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and automotive body control modules requiring stable component supply, long-term data integrity, and Microwire interface compatibility.
Supply support for 93LC56BX-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 microcontrollers, analog components, and nonvolatile memory solutions, headquartered in Chandler, Arizona.
The 93LC56 series belongs to Microchip's legacy Microwire EEPROM product line, designed specifically for cost-sensitive, low-power embedded systems requiring simple 3-wire serial configuration storage with guaranteed data retention and high endurance.
FAQ
What is the memory organization of the 93LC56BX-I/SN?
The 93LC56BX-I/SN features a fixed 128 × 16-bit (2 Kbit) organization. As a 'B' variant, it does not include an ORG pin - confirming dedicated 16-bit word addressing. This eliminates external configuration logic and ensures deterministic x16 data transfers without runtime reconfiguration, making it ideal for systems requiring consistent 16-bit parameter storage.
Does the 93LC56BX-I/SN support both 8-bit and 16-bit modes?
No, the 93LC56BX-I/SN supports only 16-bit mode. Its 'B' suffix and absence of an ORG pin (Pin 6 is NC) confirm fixed 128 × 16-bit organization. Unlike 'C' variants, it cannot be configured for 8-bit operation - all READ and WRITE instructions transfer 16 data bits per address, requiring compatible Microwire controller framing.
What is the purpose of the NC pin on the 93LC56BX-I/SN?
Pin 6 on the 93LC56BX-I/SN is designated NC (No Connection) because this 'B' variant lacks the ORG pin found on 'C' versions. It is internally unconnected and must be left floating or tied to VSS per PCB layout guidelines. This distinguishes it from 93LC56CX-I/SN, where Pin 6 serves as the ORG input for x8/x16 selection.
How does the Ready/Busy status work on the 93LC56BX-I/SN?
The DO pin of the 93LC56BX-I/SN outputs Ready/Busy status during erase/write cycles: DO = low indicates ongoing operation; DO = high signals completion. To sample status, CS must be brought high for ≥250 ns after TCSL, and the device must be in active mode - DO remains High-Z if CS stays low throughout the cycle.
Is the 93LC56BX-I/SN RoHS compliant and Pb-free?
Yes, the 93LC56BX-I/SN is Pb-free and RoHS compliant, with a Matte Tin (Sn) finish on its SOIC-8 package. This complies with EU Directive 2011/65/EU and is confirmed in Microchip's DS21794G datasheet, enabling use in environmentally regulated industrial and medical applications without lead-content restrictions.
93LC56BX-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 128 x 16
- 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-SOIC
93LC56BX-I/SN FAQ
1.How can I place an order for 93LC56BX-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC56BX-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 93LC56BX-I/SN reliable?
The price and inventory of 93LC56BX-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 93LC56BX-I/SN is usually 5 days.
3.What payment methods are accepted for 93LC56BX-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC56BX-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC56BX-I/SN?
93LC56BX-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC56BX-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 93LC56BX-I/SN?
For technical support, including 93LC56BX-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC56BX-I/SN requirements.
6.How does Aetrix verify that 93LC56BX-I/SN is sourced from the original manufacturer or authorized distributors?
All 93LC56BX-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 93LC56BX-I/SN meets industry standards.
7.What is the process for return or replacement of 93LC56BX-I/SN?
All 93LC56BX-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93LC56BX-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 93LC56BX-I/SN part is unused and in its original packaging.
Return procedure for 93LC56BX-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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