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Microchip Technology 93LC56BT-I/SN15KVAO
- Part No.:
- 93LC56BT-I/SN15KVAO
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC56BT-I/SN15KVAO.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,721
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Product details
Overview
93LC56BT-I/SN15KVAO from Microchip Technology is a 2 Kbit (256 × 8-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, operating from 2.5V to 5.5V, rated for industrial temperature range (−40°C to +85°C), and housed in an 8-lead SOIC package (SN). It supports self-timed erase/write cycles, automatic ERAL before WRAL, and Ready/Busy status via DO pin - used in microcontroller configuration storage and sensor calibration data retention.
For engineers reviewing the 93LC56BT-I/SN15KVAO datasheet, 93LC56BT-I/SN15KVAO pinout, 93LC56BT-I/SN15KVAO application, or 93LC56BT-I/SN15KVAO equivalent, key selection criteria include VCC range (2.5–5.5 V), 256 × 8-bit organization (no ORG pin), industrial temp rating, SOIC-8 package compatibility, and Microwire timing compliance (max 2 MHz at 2.5 V).
Technical Context
This device implements a synchronous serial Microwire interface with CS, CLK, and DI/DO signals. It uses internal auto-erase-before-write logic and supports sequential read, ERAL (Erase All), and WRAL (Write All) commands - all initiated by falling edge of CS for 93LC versions. The DO pin serves dual function: data output during READ and Ready/Busy status polling during programming.
Power-on data protection is enforced via internal voltage detect (VPOR = 1.5 V typical); the device powers up in EWDS (Erase/Write Disable) mode and requires explicit EWEN command before any write operation. Standby current is ≤1 µA at 2.5 V, supporting battery-backed systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 words × 8 bits) - fixed x8 organization; no ORG pin functionality. |
| VCC Range | 2.5 V to 5.5 V - supports wide supply rails including 3.3 V and 5 V systems. |
| Temp Range | −40°C to +85°C (Industrial grade) - qualified for embedded control and industrial automation. |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - minimal GPIO usage, no address bus required. |
| Write Cycle Time | 6 ms typical (TWC) - self-timed; no external delay needed; includes auto-erase. |
| Endurance | 1,000,000 erase/write cycles - ensures long-term reliability in field-updatable applications. |
| Data Retention | 200 years at 25°C - suitable for permanent configuration storage without refresh. |
| Standby Current | ≤1 µA at 2.5 V - enables ultra-low-power operation in sleep modes. |
Pinout & Package
8-lead SOIC package (SN), Pb-free Matte Tin finish, 150 mil body width. Pin 1 marked with laser dot or notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS | Chip Select | Active-high enable; must be held ≥250 ns low between instructions; initiates self-timed write on falling edge. |
| 2 CLK | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcode/address/data; stoppable mid-sequence. |
| 3 DI | Data Input | Accepts Start bit, opcode, address, and write data; tied to DO only with series resistor to avoid bus conflict. |
| 4 DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); high-Z when not active; status valid after TSV delay. |
| 5 VSS | Ground | Reference for all I/O and internal circuitry; must be connected directly to system ground plane. |
| 6 NC | No Connect | Internally unconnected; must be left floating or tied to VSS per layout best practice. |
| 7 ORG | Organization Select | Not applicable - 93LC56B/T variant has ORG pin, but 93LC56A/B/C 'T' suffix indicates A-version (x8-only); this pin is NC. |
| 8 VCC | Power Supply | 2.5–5.5 V input; internal POR circuit (1.5 V threshold) prevents writes during brown-out. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed Erase/Write | Eliminates need for external timing control or software delays - write completes autonomously in ≤6 ms. |
| Automatic ERAL before WRAL | Ensures full array is erased prior to Write All, preventing partial overwrites and data corruption. |
| Ready/Busy Status via DO | Enables non-blocking polling during programming - avoids fixed delays and improves system responsiveness. |
| Power-On/Off Data Protection | Hardware-enforced lockout below 1.5 V VCC prevents inadvertent writes during power ramp-up/down. |
| Erase/Write Enable/Disable (EWEN/EWDS) | Explicit command-based write gating adds firmware-level control over memory integrity. |
| Sequential Read Mode | Reduces transaction overhead - continuous clocking reads successive addresses without reissuing opcodes. |
Applications
| Industrial Sensor Calibration | Microcontroller Configuration Storage |
|---|---|
Use Scenario: Storing factory-trimmed ADC offset/gain coefficients and temperature compensation tables in programmable sensors. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed at boot; Microwire interface allows sharing of MCU SPI peripheral with minimal pin count. Use Value: Enables field-replaceable sensor modules with unique calibration data preserved across power cycles and firmware updates. | Use Scenario: Holding bootloader settings, communication protocol parameters, and user-defined I/O mappings in embedded controllers. IC Role / Device Role / Timing Role: Configuration EEPROM interfaced via dedicated GPIOs or shared SPI; accessed during initialization before main application starts. Use Value: Allows end-user customization without reflashing MCU firmware - reducing support burden and enabling flexible product variants. |
| Power Meter Firmware Patch Storage | Medical Device Safety Parameter Backup |
Use Scenario: Storing validated firmware patches and cryptographic signatures in utility-grade electricity meters deployed in remote locations. IC Role / Device Role / Timing Role: Secure auxiliary memory holding signed update payloads; accessed only during authenticated OTA update sequence. Use Value: Provides tamper-resistant patch storage independent of main MCU flash, meeting IEC 62056-61 security requirements. | Use Scenario: Backing up critical safety thresholds (e.g., maximum infusion rate, alarm limits) in battery-powered portable medical pumps. IC Role / Device Role / Timing Role: Fail-safe parameter vault; retains values even if main MCU resets or loses power unexpectedly. Use Value: Meets ISO 13485 and IEC 62304 requirements for persistent safety-critical data with >200-year retention and 1M-cycle endurance. |
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/SN | Same 256 × 8-bit organization, identical SOIC-8 package, but lacks 'T' suffix indicating tape-and-reel packaging and extended traceability (15KVAO). | Standard production version; no enhanced marking or reel-specific logistics - suitable for non-audit-trail applications. | Select when full traceability (15KVAO) and tape-and-reel delivery are not required; lower cost alternative with identical electrical behavior. |
| AT25020B-MAHL-T | 2 Kbit SPI EEPROM (not Microwire); supports 10 MHz clock vs. 2 MHz max for 93LC56BT at 2.5 V; different instruction set and status reporting. | Requires SPI peripheral instead of Microwire; no Ready/Busy pin - relies on WIP bit polling via STATUS register. | Choose for higher-speed interfaces or existing SPI infrastructure; verify firmware compatibility due to protocol and timing differences. |
Compared with 93LC56B-I/SN, the 93LC56BT-I/SN15KVAO adds full reel traceability and packaging compliance for high-reliability manufacturing; versus AT25020B-MAHL-T, it offers simpler Microwire timing and hardware-ready/busy signaling but at lower maximum clock rate.
Availability
93LC56BT-I/SN15KVAO is available at Aetrix Electronics and suitable for industrial sensor calibration, microcontroller configuration storage, and power meter firmware patch storage requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 93LC56BT-I/SN15KVAO 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 memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93LCxx family is designed specifically for low-power, nonvolatile serial memory applications in resource-constrained embedded systems, emphasizing Microwire compatibility, robust data retention, and industrial-grade reliability.
FAQ
What is the memory organization of the 93LC56BT-I/SN15KVAO?
The 93LC56BT-I/SN15KVAO is a 256 × 8-bit (2 Kbit) EEPROM with fixed x8 organization. It belongs to the 'A' version of the 93LC56 family, meaning the ORG pin is not functional - the device operates exclusively in 8-bit mode. This eliminates external configuration logic and simplifies interface design compared to C-version parts with selectable word size.
Does the 93LC56BT-I/SN15KVAO require an external pull-up resistor on the DO pin?
No, the 93LC56BT-I/SN15KVAO does not require an external pull-up on DO. The DO pin is actively driven high or low during READ or Ready/Busy status reporting, and enters High-Z state otherwise. However, if DI and DO are shorted (common-bus configuration), a series resistor (e.g., 10 kΩ) is recommended to prevent bus conflict during dummy-zero read phases.
What is the significance of the '15KVAO' suffix in 93LC56BT-I/SN15KVAO?
The '15KVAO' suffix denotes Microchip's tape-and-reel packaging and traceability code: '15' = year (2015), 'KV' = work week (week 22), 'AO' = internal lot and process identifier. This enables full production traceability per ISO 9001 and automotive IATF 16949 requirements - critical for high-reliability industrial and medical applications using the 93LC56BT-I/SN15KVAO.
Can the 93LC56BT-I/SN15KVAO operate reliably at 2.5 V?
Yes, the 93LC56BT-I/SN15KVAO is fully specified for operation down to 2.5 V. At this voltage, it supports up to 2 MHz clock frequency (A2/A3), 1 µA standby current (D10), and 6 ms write cycle time (A12). Its VPOR threshold of 1.5 V ensures robust power-on protection, making it suitable for battery-powered or low-voltage embedded systems where the 93LC56BT-I/SN15KVAO maintains full functionality.
How does the Ready/Busy status work on the 93LC56BT-I/SN15KVAO?
The DO pin of the 93LC56BT-I/SN15KVAO outputs Ready/Busy status during erase or write cycles: DO = low indicates ongoing operation; DO = high means completion. To read status, CS must be brought high for ≥250 ns after the initial CS low pulse (TCSL), then sampled after TSV delay (200–500 ns). Issuing a Start bit followed by CS low clears the status flag - a hardware-managed handshake eliminating software timing guesswork.
93LC56BT-I/SN15KVAO 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:
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
93LC56BT-I/SN15KVAO FAQ
1.How can I place an order for 93LC56BT-I/SN15KVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC56BT-I/SN15KVAO 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 93LC56BT-I/SN15KVAO reliable?
The price and inventory of 93LC56BT-I/SN15KVAO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC56BT-I/SN15KVAO is usually 5 days.
3.What payment methods are accepted for 93LC56BT-I/SN15KVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC56BT-I/SN15KVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC56BT-I/SN15KVAO?
93LC56BT-I/SN15KVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC56BT-I/SN15KVAO 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 93LC56BT-I/SN15KVAO?
For technical support, including 93LC56BT-I/SN15KVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC56BT-I/SN15KVAO requirements.
6.How does Aetrix verify that 93LC56BT-I/SN15KVAO is sourced from the original manufacturer or authorized distributors?
All 93LC56BT-I/SN15KVAO 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 93LC56BT-I/SN15KVAO meets industry standards.
7.What is the process for return or replacement of 93LC56BT-I/SN15KVAO?
All 93LC56BT-I/SN15KVAO units undergo pre-shipment inspection (PSI). If there is an issue with 93LC56BT-I/SN15KVAO, 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 93LC56BT-I/SN15KVAO part is unused and in its original packaging.
Return procedure for 93LC56BT-I/SN15KVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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