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Microchip Technology 93LC56BT-E/OT
- Part No.:
- 93LC56BT-E/OT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SOT-23-6
- Datasheet:
-
93LC56BT-E/OT.pdf
- Description:
- IC EEPROM 2KBIT MIC WIRE SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,958
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Product details
Overview
93LC56BT-E/OT from Microchip Technology Inc. is a 2 Kbit (256 × 8-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, operating from 2.5 V to 5.5 V, rated for automotive temperature range (–40°C to +125°C), and housed in a Pb-free 6-lead SOT-23 package. It delivers 1 million erase/write cycles and >200 years data retention for nonvolatile configuration storage in engine control units.
For engineers reviewing the 93LC56BT-E/OT datasheet, 93LC56BT-E/OT pinout, 93LC56BT-E/OT application, or 93LC56BT-E/OT equivalent, key selection criteria include its automotive-grade temperature rating, SOT-23 footprint compatibility, 256 × 8-bit fixed organization (no ORG pin), self-timed write/erase with Ready/Busy status, and industry-standard Microwire serial protocol support.
Technical Context
This device implements a synchronous serial interface with CS, CLK, and DI/DO pins - no ORG pin present (confirmed 'A' version). Communication uses start-bit detection followed by opcode, address, and data bits clocked on CLK rising edges; DO provides both read data and Ready/Busy status polling during programming.
It features hardware-based power-on/off data protection, automatic ERAL before WRAL, EWEN/EWDS write-enable/disable commands, and sequential read capability. All operations are self-timed: typical write cycle time is 6 ms, ERAL is 6 ms, and WRAL is 15 ms - all requiring VCC ≥ 4.5 V for full functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit organization; fixed, no ORG pin) |
| VCC range | 2.5 V to 5.5 V - supports wide-input industrial and automotive power rails |
| Temperature grade | Automotive (E): –40°C to +125°C - qualified for under-hood and safety-critical systems |
| Endurance | 1,000,000 erase/write cycles - enables frequent calibration or logging updates |
| Data retention | >200 years at +25°C - ensures long-term firmware or trim data integrity |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - minimal GPIO usage, no I²C pull-ups required |
| Write cycle time | 6 ms typical - deterministic timing for host software timeout handling |
Pinout & Package
Package: 6-lead SOT-23 (Pb-free Matte Tin finish), footprint code OT per Microchip documentation; compact 2.9 mm × 1.6 mm × 1.1 mm body, suitable for space-constrained automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DO | Data Output / Ready-Busy Status | Tri-state output delivering read data or logic-low busy signal during erase/write; high-Z when deselected |
| VSS | Ground | Reference return path for all digital and analog functions; must be low-impedance for noise immunity |
| DI | Data Input | Serial input for opcodes, addresses, and write data; sampled on CLK rising edge |
| VCC | Power Supply | 2.5–5.5 V supply; internal voltage detector (VPOR = 1.5 V) prevents operation below safe threshold |
| CS | Chip Select | Active-high enable; minimum 250 ns low time (TCSL) required between instructions |
| CLK | Serial Clock | Synchronizes all data transfers; rising-edge triggered; stoppable mid-sequence without error |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control - host only polls DO for completion |
| Automatic ERAL before WRAL | Guarantees clean memory state prior to bulk write, preventing partial corruption |
| Power-on/off data protection | Hardware lockout below 1.5 V VCC prevents inadvertent writes during brown-out or startup |
| EWEN/EWDS command security | Requires explicit enable before any write - prevents accidental overwrites in fielded systems |
| Sequential read mode | Enables fast dump of multiple registers with single CS assertion - reduces bus overhead |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Storing calibrated sensor offsets and fuel injection trim tables subject to periodic field updates. IC Role / Device Role / Timing Role: Nonvolatile configuration memory with guaranteed write integrity across automotive thermal and voltage transients. Use Value: 1M endurance and >200-year retention ensure calibration data survives vehicle lifetime without degradation. | Use Scenario: Holding camera module lens calibration coefficients and radar beamforming parameters updated during factory programming. IC Role / Device Role / Timing Role: Secure, low-pin-count serial EEPROM interfaced directly to MCU SPI-like peripheral. Use Value: SOT-23 package fits tight PCB real estate; automotive temp rating matches ADAS module requirements. |
| Body Control Module (BCM) | Infotainment Head Unit |
Use Scenario: Retaining user preferences (seat position, mirror angle, lighting profiles) across ignition cycles. IC Role / Device Role / Timing Role: Low-power serial memory accessed intermittently during wake-up events. Use Value: 1 µA standby current (ICCS) minimizes battery drain during vehicle sleep mode. | Use Scenario: Storing display gamma tables and audio equalizer presets loaded at boot. IC Role / Device Role / Timing Role: Microwire-compatible EEPROM supporting deterministic 6 ms write cycles for firmware-safe updates. Use Value: Ready/Busy status on DO pin enables precise host software synchronization without fixed delays. |
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/OT | Industrial temp grade (–40°C to +85°C); same 256 × 8-bit organization, SOT-23 package, and electrical specs | Not qualified for automotive under-hood use; unsuitable for AEC-Q100-referenced designs | Select only for cost-sensitive non-automotive applications where extended temperature is unnecessary |
| AT25020B-MAHL-T | 2 Kbit SPI interface (4-wire), 1.8–5.5 V supply, industrial temp; no Ready/Busy pin - relies on WIP flag polling | Lacks dedicated DO-as-status pin; requires different driver logic and longer worst-case write time (5 ms max) | Choose if existing design uses SPI peripherals and does not require hardware-ready signaling |
Compared with 93LC56B-I/OT, the 93LC56BT-E/OT adds automotive qualification and identical functionality; compared with AT25020B-MAHL-T, it offers native Microwire compatibility, deterministic Ready/Busy signaling, and automotive-grade reliability - critical for safety-related parameter storage.
Availability
93LC56BT-E/OT is available at Aetrix Electronics and suitable for engine control units, ADAS modules, and body control systems requiring stable component supply with automotive-grade lifecycle assurance.
Supply support for 93LC56BT-E/OT 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 devices, and memory solutions, headquartered in Chandler, Arizona, with global manufacturing and support infrastructure.
The 93LCxx family was designed specifically for cost-sensitive, low-power serial EEPROM applications in automotive, industrial, and consumer systems - emphasizing robustness, small footprint, and Microwire interoperability.
FAQ
What is the memory organization of the 93LC56BT-E/OT?
The 93LC56BT-E/OT is a fixed 256 × 8-bit (2 Kbit) organization device - it belongs to the 'A' version subgroup and has no ORG pin. This means it exclusively supports 8-bit word access and does not offer configurable 16-bit mode. Its pinout omits ORG, confirming dedicated x8 operation per Microchip DS21794G.
Does the 93LC56BT-E/OT support the Ready/Busy status function?
Yes, the 93LC56BT-E/OT provides Ready/Busy status via the DO pin. During erase or write operations, DO outputs logic-low while busy and transitions high upon completion. This allows host firmware to poll DO instead of using fixed timeouts - a key feature confirmed in Section 2.4 and Figure 2-1 of the datasheet.
What package type is used for the 93LC56BT-E/OT?
The 93LC56BT-E/OT uses a 6-lead SOT-23 package, identified by Microchip's package code 'OT'. Its dimensions are 2.9 mm × 1.6 mm × 1.1 mm, with Pb-free Matte Tin finish. Pin mapping matches the standard SOT-23 layout: DO (pin 1), VSS (pin 2), DI (pin 3), VCC (pin 6), CS (pin 5), and CLK (pin 4).
Is an Erase/Write Enable (EWEN) command required before writing to the 93LC56BT-E/OT?
Yes, the 93LC56BT-E/OT powers up in Erase/Write Disable (EWDS) mode. An EWEN instruction must be issued before any ERASE or WRITE operation. This security feature prevents accidental writes during power-up or noise events - a mandatory step documented in Section 2.6 and Figure 2-6 of DS21794G.
What is the maximum clock frequency supported by the 93LC56BT-E/OT?
The 93LC56BT-E/OT supports up to 3 MHz clock frequency when VCC is 4.5 V to 5.5 V, 2 MHz at 2.5 V to 4.5 V, and 1 MHz at 1.8 V to 2.5 V. However, since the 93LC56BT-E/OT operates from 2.5 V to 5.5 V (no 1.8 V support), its usable range is 2–3 MHz - verified in Table 1-2, Parameter A1 of DS21794G.
93LC56BT-E/OT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-23-6
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
93LC56BT-E/OT FAQ
1.How can I place an order for 93LC56BT-E/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC56BT-E/OT 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-E/OT reliable?
The price and inventory of 93LC56BT-E/OT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC56BT-E/OT is usually 5 days.
3.What payment methods are accepted for 93LC56BT-E/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC56BT-E/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC56BT-E/OT?
93LC56BT-E/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC56BT-E/OT 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-E/OT?
For technical support, including 93LC56BT-E/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC56BT-E/OT requirements.
6.How does Aetrix verify that 93LC56BT-E/OT is sourced from the original manufacturer or authorized distributors?
All 93LC56BT-E/OT 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-E/OT meets industry standards.
7.What is the process for return or replacement of 93LC56BT-E/OT?
All 93LC56BT-E/OT units undergo pre-shipment inspection (PSI). If there is an issue with 93LC56BT-E/OT, 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-E/OT part is unused and in its original packaging.
Return procedure for 93LC56BT-E/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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