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Microchip Technology 93LC56BXT-I/SN
- Part No.:
- 93LC56BXT-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC56BXT-I/SN.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:9,902
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Product details
Overview
93LC56BXT-I/SN from Microchip Technology Inc. is a 2 Kbit (128 × 16-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 2.5–5.5 V supply range, and industrial temperature grade (–40°C to +85°C). It features self-timed erase/write cycles, automatic ERAL before WRAL, Ready/Busy status via DO pin, and 1,000,000 endurance cycles - used in microcontroller configuration storage and calibration data retention.
For engineers reviewing the 93LC56BXT-I/SN datasheet, 93LC56BXT-I/SN pinout, 93LC56BXT-I/SN application, or 93LC56BXT-I/SN equivalent, key selection criteria include guaranteed 16-bit organization (no ORG pin), SOIC-8 package compatibility, 6 ms program cycle time, VCC ≥ 4.5 V for ERAL/WRAL, and support for sequential read and EWEN/EWDS write protection.
Technical Context
The 93LC56BXT-I/SN implements a fixed 128 × 16-bit memory array with dedicated 16-bit communication - no ORG pin required. Its Microwire protocol uses CS, CLK, and DI/DO for opcode/address/data transfer, with DO providing both data output and Ready/Busy status polling during erase/write operations.
It operates in EWDS mode at power-up and requires explicit EWEN before any erase or write. All programming cycles are self-timed and auto-erase enabled; ERAL and WRAL commands include built-in full-array erase, requiring VCC ≥ 4.5 V for reliable execution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (128 words × 16 bits) - fixed x16 organization, no ORG pin needed |
| VCC range | 2.5 V to 5.5 V - supports wide-range industrial power rails, POR threshold at 1.5 V |
| Endurance | 1,000,000 erase/write cycles - enables long-term field calibration updates |
| Data retention | 200 years at 25°C - suitable for lifetime nonvolatile storage without refresh |
| Write cycle time | 6 ms typical - defines minimum interval between successive write commands |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - minimal GPIO usage on host MCU |
| Temp range | –40°C to +85°C (Industrial grade) - validated for embedded control environments |
Pinout & Package
93LC56BXT-I/SN is supplied in an 8-lead SOIC package (SN), with lead finish Pb-free (Matte Tin). Pin 1 is CS, pin 2 is CLK, pin 3 is DI, pin 4 is DO, pin 5 is VSS, pin 6 is NC (no internal connection), pin 7 is NC, and pin 8 is VCC.
| 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, opcodes, addresses, and write data; shares no internal logic with DO |
| DO (Pin 4) | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z on CS fall |
| VSS (Pin 5) | Ground | Reference for all I/O and internal circuitry; must be connected before VCC |
| NC (Pin 6) | No Connection | Not bonded internally; must be left unconnected or tied to VSS per layout best practice |
| NC (Pin 7) | No Connection | Not bonded internally; electrically isolated; avoid routing signals nearby |
| VCC (Pin 8) | Power Supply | 2.5–5.5 V supply; powers internal logic and charge pump; ≥4.5 V required for ERAL/WRAL |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 16-bit organization | Eliminates external ORG pin routing and level-setting components; simplifies PCB layout |
| Self-timed erase/write | Removes need for host MCU timing loops or external delay circuits during programming |
| Automatic ERAL before WRAL | Guarantees clean memory state before bulk write - prevents partial-write corruption |
| Ready/Busy status on DO | Enables efficient polling without additional status lines or interrupts |
| EWEN/EWDS write protection | Prevents accidental overwrites during firmware updates or brown-out conditions |
Applications
| Motor Control Calibration | Industrial Sensor Configuration |
|---|---|
Use Scenario: Storing motor winding resistance compensation values and PID tuning parameters that persist across power cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during MCU boot and runtime recalibration. Use Value: Enables field-upgradable calibration without firmware reflash; 200-year retention ensures data integrity over equipment lifetime. | Use Scenario: Holding sensor offset/gain trim coefficients and linearization tables for analog front-end ICs. IC Role / Device Role / Timing Role: Serial configuration memory interfaced to MCU via GPIO bit-banged Microwire. Use Value: Reduces BOM count by replacing discrete trim pots; 1M endurance supports factory and field calibration cycles. |
| Smart Meter Firmware Settings | Medical Device Safety Parameters |
Use Scenario: Securing tariff schedules, pulse constants, and communication protocol settings in utility meters. IC Role / Device Role / Timing Role: Tamper-resistant parameter store with EWEN/EWDS lockout during normal operation. Use Value: Meets IEC 62056 requirements for secure, infrequently updated configuration storage. | Use Scenario: Retaining FDA-mandated safety thresholds (e.g., max current, timeout limits) in portable diagnostic devices. IC Role / Device Role / Timing Role: Fail-safe configuration vault accessed only during device initialization or service mode. Use Value: Ensures critical safety values survive battery replacement and thermal stress; RoHS/Pb-free compliance meets medical regulatory standards. |
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, but lacks 'X' (eXposed pad) designation - standard SN variant | No exposed thermal pad; slightly lower thermal performance in high-power-density layouts | Select when thermal dissipation is not limiting and cost optimization is prioritized |
| AT25020B-MAHL-T | 2 Kbit SPI interface (not Microwire), 1.8–5.5 V VCC, 5 MHz max clock, different instruction set and status reporting | Requires SPI peripheral instead of bit-banged Microwire; no native Ready/Busy pin - relies on WIP flag polling | Select when migrating to SPI-based platforms or consolidating with other Atmel SPI EEPROMs |
Compared with 93LC56BXT-I/SN, the 93LC56BT-I/SN offers identical functionality at lower thermal capability, while AT25020B-MAHL-T shifts interface architecture and command structure - requiring firmware adaptation but enabling higher throughput and broader ecosystem compatibility.
Availability
93LC56BXT-I/SN is available at Aetrix Electronics and suitable for motor control calibration, industrial sensor configuration, and smart meter firmware settings requiring stable component supply, long-term obsolescence management, and RoHS-compliant sourcing.
Supply support for 93LC56BXT-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, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets since 1989.
The 93LC56BXT-I/SN belongs to Microchip's legacy 93XX serial EEPROM family, designed specifically for low-pin-count, low-power, Microwire-compatible nonvolatile storage in resource-constrained embedded systems.
FAQ
What is the memory organization of the 93LC56BXT-I/SN?
The 93LC56BXT-I/SN has a fixed 128 × 16-bit (2 Kbit) organization. Unlike 'C' variants, it does not use an ORG pin - its x16 configuration is hardwired. This eliminates external pull-up/pull-down components and simplifies design verification. The 93LC56BXT-I/SN delivers deterministic 16-bit word access without runtime configuration overhead.
Does the 93LC56BXT-I/SN require an external ORG pin connection?
No, the 93LC56BXT-I/SN does not require or support an ORG pin. As a 'B'-suffix device, it is factory-configured for 16-bit operation only. Pins 6 and 7 are marked NC (No Connection) in the SOIC-8 package and must remain unconnected. This eliminates layout ambiguity and reduces risk of misconfiguration versus 'C' variants.
What is the minimum VCC required for ERAL and WRAL commands on the 93LC56BXT-I/SN?
The 93LC56BXT-I/SN requires VCC ≥ 4.5 V to execute ERAL (Erase All) and WRAL (Write All) commands reliably. Below this threshold, these operations may fail or yield incomplete erasure. This specification is explicitly defined in DS21794G-page 8 and page 11. Always verify VCC stability during bulk operations using a scope or supervisor IC.
How does the Ready/Busy status function on the 93LC56BXT-I/SN?
The 93LC56BXT-I/SN asserts Ready/Busy status on the DO pin: DO = low indicates active erase/write, DO = high means ready. To poll, hold CS high for ≥250 ns after initiating a command, then sample DO. After completion, issue a Start bit followed by CS low to clear the status. This avoids blocking delays and enables efficient host MCU scheduling.
Is the 93LC56BXT-I/SN RoHS compliant and Pb-free?
Yes, the 93LC56BXT-I/SN is RoHS compliant and features a Pb-free Matte Tin (Sn) lead finish, as confirmed in DS21794G-page 1 and page 14. The 'X' in the part number denotes the eXposed pad variant of the SOIC-8 (SN) package, which retains full RoHS compliance. Traceability markings follow JEDEC standards and appear on the package body or reel label.
93LC56BXT-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:
- 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
93LC56BXT-I/SN FAQ
1.How can I place an order for 93LC56BXT-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC56BXT-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 93LC56BXT-I/SN reliable?
The price and inventory of 93LC56BXT-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 93LC56BXT-I/SN is usually 5 days.
3.What payment methods are accepted for 93LC56BXT-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC56BXT-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC56BXT-I/SN?
93LC56BXT-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC56BXT-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 93LC56BXT-I/SN?
For technical support, including 93LC56BXT-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC56BXT-I/SN requirements.
6.How does Aetrix verify that 93LC56BXT-I/SN is sourced from the original manufacturer or authorized distributors?
All 93LC56BXT-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 93LC56BXT-I/SN meets industry standards.
7.What is the process for return or replacement of 93LC56BXT-I/SN?
All 93LC56BXT-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93LC56BXT-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 93LC56BXT-I/SN part is unused and in its original packaging.
Return procedure for 93LC56BXT-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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