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Microchip Technology 93LC56BT-I/SN
- Part No.:
- 93LC56BT-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC56BT-I/SN.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:11,421
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Product details
Overview
93LC56BT-I/SN from Microchip Technology Inc. is a 2 Kbit low-voltage serial EEPROM with 128 × 16-bit organization, operating across 2.5–5.5 V supply and rated for industrial temperature (–40°C to +85°C). It features Microwire-compatible 3-wire serial interface (CS/CLK/DI/DO), self-timed erase/write cycles, automatic ERAL before WRAL, and 1,000,000 endurance cycles. It is used in microcontroller-based systems for storing calibration data, configuration settings, or firmware patches.
For engineers reviewing the 93LC56BT-I/SN datasheet, 93LC56BT-I/SN pinout, 93LC56BT-I/SN application, or 93LC56BT-I/SN equivalent, key selection criteria include its 16-bit word organization, SOIC-8 package with NC on pin 7, VCC range compatibility with 3.3 V and 5 V systems, and support for sequential read and Ready/Busy polling via DO.
Technical Context
The 93LC56BT-I/SN implements a synchronous serial Microwire interface with start-bit detection, opcode-driven command set (READ/WRITE/ERASE/ERAL/WRAL/EWEN/EWDS), and internal address counter for sequential access. Its memory array is organized as 128 words × 16 bits, fixed by its 'B' suffix - no ORG pin functionality applies.
Power-on data protection is enforced by internal voltage detection (VPOR = 1.5 V typical), and write operations require explicit Erase/Write Enable (EWEN) prior to execution. Standby current is ≤5 µA at VCC = 2.5–5.5 V, and all programming cycles are fully self-timed without external timing constraints beyond minimum CS low time (TCSL ≥ 250 ns).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (128 × 16-bit organization) |
| VCC range | 2.5 V to 5.5 V - supports both 3.3 V and 5 V host systems without level shifting |
| Endurance | 1,000,000 erase/write cycles - enables long-term field reprogramming in embedded control |
| Data retention | 200 years at 25°C - suitable for unattended, maintenance-free applications |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI, DO) - minimal GPIO usage on MCU |
| Write cycle time | 6 ms max (TWC) - deterministic latency for firmware update or parameter save routines |
| Operating temp | –40°C to +85°C (Industrial grade) - qualified for industrial automation and automotive body electronics |
Pinout & Package
93LC56BT-I/SN is supplied in an 8-lead SOIC package (SN), with pin 1 marked by laser dot. Pin 7 is NC (no internal connection); ORG pin is not present on 'B' versions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-high enable; must be held ≥250 ns low between commands to reset internal logic |
| 2 (CLK) | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcodes, addresses, and data |
| 3 (DI) | Data Input | Accepts start bit, instruction opcodes, address bits, and write data; high impedance when deselected |
| 4 (DO) | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z on CS falling edge |
| 5 (VSS) | Ground | Reference return path for all digital and analog circuitry; must be low-impedance |
| 6 (NC) | No Connection | Internally unconnected; must be left floating or tied to VSS per layout best practice |
| 7 (VCC) | Power Supply | 2.5–5.5 V supply input; requires local 0.1 µF ceramic decoupling adjacent to pin |
| 8 (VCC) | Power Supply | Duplicate VCC pin for improved power integrity in SOIC-8 package |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control or software delay loops during programming |
| Automatic ERAL before WRAL | Ensures full array readiness before bulk write, preventing partial-write corruption |
| Ready/Busy polling via DO | Enables non-blocking firmware operation - host can perform other tasks while waiting |
| Power-on/off data protection | Hardware-enforced write inhibition below VPOR threshold (1.5 V), preventing brown-out corruption |
| 128 × 16-bit fixed organization | Optimizes storage efficiency for 16-bit MCU peripherals and register-mapped configurations |
Applications
| Industrial Sensor Calibration | Automotive Body Control Module |
|---|---|
Use Scenario: Storing factory-trimmed sensor offset/gain coefficients and temperature compensation tables in pressure or temperature transducers. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed during power-up initialization and runtime correction lookups. Use Value: Enables single-device calibration across production batches without firmware revision; 200-year retention ensures lifetime accuracy without recalibration. | Use Scenario: Holding seat position memory, mirror angle presets, and lighting configuration profiles in vehicle door modules. IC Role / Device Role / Timing Role: Dedicated parameter storage interfaced directly to 8/16-bit automotive MCUs via Microwire. Use Value: Supports >1M seat/mirror adjustment cycles over vehicle lifetime; industrial temp rating covers under-hood and cabin environments. |
| Medical Infusion Pump Settings | Smart Energy Meter Firmware Patch Storage |
Use Scenario: Retaining drug library parameters, dose limits, and user audit logs in battery-backed portable infusion devices. IC Role / Device Role / Timing Role: Secure, low-power configuration and event log storage with hardware write protection. Use Value: EWEN/EWDS commands prevent accidental overwrite during runtime; 2.5 V min VCC allows direct use with Li-ion battery supply. | Use Scenario: Storing field-deployed firmware patches and tariff table updates in utility-grade electricity meters. IC Role / Device Role / Timing Role: Field-upgradable code/data repository accessed during meter boot or scheduled maintenance windows. Use Value: 6 ms write time enables fast patch application; 1M endurance supports decades of OTA updates under IEC 62056 compliance. |
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/P | Same 128×16-bit organization and electrical specs, but in 8-lead PDIP package (P) | PDIP preferred for through-hole prototyping or legacy industrial PCBs; SN offers surface-mount reliability and smaller footprint | Select 93LC56B-I/P only for hand-soldered evaluation or repair scenarios where SOIC rework is impractical |
| AT25020B-SSHL-T | 2 Kbit SPI interface (4-wire), 1.8–5.5 V VCC, 128×16-bit, but lacks ERAL/WRAL and uses different command set | Requires SPI-capable MCU; no native Microwire compatibility; no automatic ERAL before WRAL | Choose only if migrating to SPI architecture; requires firmware rewrite and validation of timing margins |
Compared with 93LC56B-I/P and AT25020B-SSHL-T, the 93LC56BT-I/SN delivers Microwire-native operation in compact SOIC-8 with guaranteed ERAL-before-WRAL behavior - critical for deterministic firmware update sequences in resource-constrained controllers.
Availability
93LC56BT-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, and medical device configuration storage requiring stable component supply across multi-year production cycles.
Supply support for 93LC56BT-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 memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93LC56 series belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-power embedded systems requiring reliable nonvolatile storage with minimal pin count and firmware overhead.
FAQ
What is the memory organization of the 93LC56BT-I/SN?
The 93LC56BT-I/SN has a fixed 128 × 16-bit organization, as indicated by its 'B' suffix. Unlike 'C' variants, it does not feature an ORG pin - the word size is permanently configured for 16-bit access. This eliminates external configuration logic and simplifies interface design for 16-bit microcontrollers or peripherals requiring aligned data storage.
Does the 93LC56BT-I/SN support sequential read mode?
Yes, the 93LC56BT-I/SN supports sequential read: when CS remains high after a READ instruction, the internal address counter automatically increments, allowing continuous output of consecutive memory locations on the DO pin. This reduces command overhead and improves throughput when reading blocks such as configuration tables or calibration arrays.
What is the function of pin 6 on the 93LC56BT-I/SN SOIC package?
Pin 6 on the 93LC56BT-I/SN is labeled NC (No Connection) in the official Microchip datasheet DS21794G. It has no internal connection and must be left unconnected - neither tied to VCC nor VSS. This differs from pin 7 (VCC) and pin 5 (VSS), which are active power terminals.
How does the 93LC56BT-I/SN handle power-loss during write operations?
The 93LC56BT-I/SN incorporates hardware-level power-loss protection: its internal voltage detector (VPOR ≈ 1.5 V) disables all write/erase functions whenever VCC drops below this threshold. This prevents partial writes and data corruption during brown-out conditions - a critical feature for battery-powered or electrically noisy industrial environments where 93LC56BT-I/SN is commonly deployed.
Is the 93LC56BT-I/SN RoHS compliant and lead-free?
Yes, the 93LC56BT-I/SN is Pb-free and RoHS compliant, as confirmed in the "Features" section of DS21794G. Its SOIC-8 (SN) package uses a Matte Tin (Sn) finish, meeting JEDEC J-STD-609A Class 1 requirements. Full compliance documentation, including substance declarations and test reports, is available through Microchip's official product page and Aetrix Electronics' material compliance portal.
93LC56BT-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
93LC56BT-I/SN FAQ
1.How can I place an order for 93LC56BT-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC56BT-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 93LC56BT-I/SN reliable?
The price and inventory of 93LC56BT-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 93LC56BT-I/SN is usually 5 days.
3.What payment methods are accepted for 93LC56BT-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC56BT-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC56BT-I/SN?
93LC56BT-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC56BT-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 93LC56BT-I/SN?
For technical support, including 93LC56BT-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC56BT-I/SN requirements.
6.How does Aetrix verify that 93LC56BT-I/SN is sourced from the original manufacturer or authorized distributors?
All 93LC56BT-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 93LC56BT-I/SN meets industry standards.
7.What is the process for return or replacement of 93LC56BT-I/SN?
All 93LC56BT-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93LC56BT-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 93LC56BT-I/SN part is unused and in its original packaging.
Return procedure for 93LC56BT-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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