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Microchip Technology 93C56BT-E/OT
- Part No.:
- 93C56BT-E/OT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SOT-23-6
- Datasheet:
-
93C56BT-E/OT.pdf
- Description:
- IC EEPROM 2KBIT MIC WIRE SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,311
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Product details
Overview
93C56BT-E/OT from Microchip Technology Inc. is a 2 Kbit serial EEPROM IC with 8-bit organization, designed for nonvolatile memory storage in embedded control systems. It operates at 4.5–5.5 V, supports Microwire-compatible 3-wire serial interface (CS/CLK/DI/DO), delivers 1 million erase/write cycles, and retains data for >200 years. Used in industrial sensor calibration and firmware parameter storage where low-power, pin-efficient memory is required.
For engineers reviewing the 93C56BT-E/OT datasheet, 93C56BT-E/OT pinout, 93C56BT-E/OT application, or 93C56BT-E/OT equivalent, key selection criteria include its 4.5–5.5 V supply range, SOT-23-6 package, 8-bit x 256-word organization, ERAL/WRAL support, and Ready/Busy status signaling via DO pin.
Technical Context
This device implements a synchronous Microwire-compatible serial interface with start-bit detection, self-timed erase/write cycles, and automatic ERAL before WRAL. It uses dedicated CS/CLK/DI/DO pins and requires EWEN command to enable programming - power-up default is EWDS for data protection.
The 93C56BT-E/OT features hardware-based power-on/off data protection, VCC voltage detect thresholds (3.8 V typical), and supports sequential read. Its timing is defined by TCSL ≥250 ns, TWC = 2 ms (write cycle), and TEC = 6 ms (ERAL), all validated across –40°C to +125°C automotive temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit organization) |
| VCC range | 4.5 V to 5.5 V - ensures compatibility with 5 V logic systems and rejects brown-out below 3.8 V |
| Endurance | 1,000,000 erase/write cycles - supports long-life field updates in industrial controllers |
| Data retention | >200 years at 25°C - enables permanent storage of calibration constants without refresh |
| Write cycle time | 2 ms (TWC) - defines minimum interval between write commands in real-time firmware |
| Temperature range | –40°C to +125°C (Automotive E grade) - qualified for under-hood and motor-control applications |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - minimal GPIO usage on microcontrollers |
| Package | SOT-23-6 (OT) - 2.9 mm × 1.6 mm footprint ideal for space-constrained PCBs |
Pinout & Package
6-pin SOT-23 package (OT suffix), surface-mount, Pb-free Matte Tin finish. Pin 1 marked by laser dot; orientation per JEDEC MO-178.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DO | Data Output / Ready-Busy indicator | Outputs read data on CLK rising edge; low = busy during erase/write, high = ready |
| VSS | Ground reference | Return path for all internal logic and I/O; must be low-impedance for noise immunity |
| DI | Data Input | Serial input for opcodes, addresses, and write data; clocked on CLK rising edge |
| VCC | Power supply | 4.5–5.5 V supply; internal POR circuit triggers at ~3.8 V to prevent corruption during power ramp |
| CS | Chip Select | Active-high enable; must be held low ≥250 ns (TCSL) between instructions to reset internal state |
| CLK | Serial clock | Synchronizes all data transfers; rising edge clocks DI input and latches DO output |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates external timing control - internal logic manages 2 ms write and 6 ms ERAL cycles |
| Automatic ERAL before WRAL | Guarantees full-array readiness before bulk write, preventing partial-write corruption |
| EWEN/EWDS security | Hardware lockout prevents accidental writes - device powers up in EWDS mode |
| Ready/Busy polling via DO | Enables non-blocking firmware operation - host reads DO instead of using fixed delays |
| Pb-free & RoHS compliant | Meets global environmental compliance requirements for automotive and industrial manufacturing |
Applications
| Industrial Sensor Calibration | Automotive ECU Parameter Storage |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for temperature and pressure sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile memory holding static configuration data accessed at boot and updated only during maintenance. Use Value: 256 × 8-bit capacity matches typical sensor coefficient sets; >200-year retention eliminates recalibration schedules. | Use Scenario: Retaining adaptive learning values (e.g., idle air control trim) across ignition cycles in engine control units. IC Role / Device Role / Timing Role: Low-latency, high-reliability parameter store interfaced directly to MCU GPIOs via Microwire. Use Value: –40°C to +125°C rating ensures operation under hood; 1M endurance supports daily updates over 10+ years. |
| Medical Device Configuration | Smart Meter Firmware Settings |
Use Scenario: Holding user-configurable therapy parameters (e.g., infusion rate limits, alarm thresholds) in portable infusion pumps. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory with hardware write protection (EWEN/EWDS). Use Value: VCC detect at 3.8 V prevents write corruption during battery swap; RoHS compliance meets medical regulatory standards. | Use Scenario: Storing tariff tables, communication keys, and metering calibration offsets in ANSI C12.19-compliant electricity meters. IC Role / Device Role / Timing Role: Serial EEPROM interfaced to metrology SoC with minimal pin count and deterministic 2 ms write latency. Use Value: SOT-23-6 package saves board space in sealed meter enclosures; 5.5 V max rating accommodates 5 V DC-DC rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC56BT-E/OT | 2.5–5.5 V VCC range; same 256 × 8-bit organization and SOT-23-6 package | Broader supply range enables use in 3.3 V systems; lacks 5 V-specific VCC detect threshold | Select when operating below 4.5 V or requiring extended voltage flexibility |
| AT25020B-MAHL-T | SPI interface (4-wire), 2 Kbit, 1.8–5.5 V, SOIC-8 package - no ORG pin, no ERAL/WRAL | Requires additional chip select line; no auto-erase-all or write-all commands | Select when SPI is preferred over Microwire or when larger package is acceptable |
Compared with 93LC56BT-E/OT, the 93C56BT-E/OT offers tighter 4.5–5.5 V regulation and higher VCC detect (3.8 V), improving robustness in noisy 5 V environments; versus AT25020B-MAHL-T, it provides Microwire compatibility and integrated ERAL/WRAL for faster bulk operations but requires different protocol handling.
Availability
93C56BT-E/OT is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive ECU parameter storage, and medical device configuration requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 93C56BT-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 microcontroller, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, serving industrial, automotive, and consumer markets globally.
The 93Cxx series was designed specifically for cost-sensitive, low-pin-count nonvolatile memory applications demanding high reliability, wide temperature operation, and Microwire protocol compatibility in resource-constrained embedded systems.
FAQ
What is the function of the ORG pin on the 93C56BT-E/OT?
The 93C56BT-E/OT does not have an ORG pin - it is a 'B'-suffix variant with fixed 16-bit organization, but this part number is actually a 'T'-suffix SOT-23-6 package version of the 93C56A (8-bit). Per Microchip DS21794G, ORG is NC on all 93C56A/B devices. The 93C56BT-E/OT uses 8-bit x 256-word organization and has no functional ORG connection.
Does the 93C56BT-E/OT support sequential read mode?
Yes, the 93C56BT-E/OT 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 synchronized to CLK rising edges - reducing host MCU overhead during block reads.
What is the minimum Chip Select low time (TCSL) required between commands for the 93C56BT-E/OT?
The 93C56BT-E/OT requires a minimum Chip Select low time (TCSL) of 250 ns between consecutive instructions. This ensures internal logic resets properly; violating TCSL may cause command misinterpretation or failed erase/write initiation, especially critical in high-speed firmware implementations.
How does the Ready/Busy status work on the 93C56BT-E/OT DO pin?
During erase or write operations, the DO pin of the 93C56BT-E/OT outputs Ready/Busy status: logic low indicates ongoing programming, logic high signals completion. Status is valid only if CS is brought high after ≥250 ns low time (TCSL); otherwise DO remains in High-Z. This enables polling-based firmware flow without fixed delays.
Is the 93C56BT-E/OT compatible with 3.3 V microcontrollers?
No, the 93C56BT-E/OT is not compatible with 3.3 V microcontrollers: its specified VCC range is strictly 4.5–5.5 V, and its VCC detect threshold is 3.8 V. Operating below 4.5 V risks unreliable communication, failed writes, or data corruption. For 3.3 V systems, consider 93LC56BT-E/OT (2.5–5.5 V) instead.
93C56BT-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:
- 2ms
- Access Time:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
93C56BT-E/OT FAQ
1.How can I place an order for 93C56BT-E/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C56BT-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 93C56BT-E/OT reliable?
The price and inventory of 93C56BT-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 93C56BT-E/OT is usually 5 days.
3.What payment methods are accepted for 93C56BT-E/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C56BT-E/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C56BT-E/OT?
93C56BT-E/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C56BT-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 93C56BT-E/OT?
For technical support, including 93C56BT-E/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C56BT-E/OT requirements.
6.How does Aetrix verify that 93C56BT-E/OT is sourced from the original manufacturer or authorized distributors?
All 93C56BT-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 93C56BT-E/OT meets industry standards.
7.What is the process for return or replacement of 93C56BT-E/OT?
All 93C56BT-E/OT units undergo pre-shipment inspection (PSI). If there is an issue with 93C56BT-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 93C56BT-E/OT part is unused and in its original packaging.
Return procedure for 93C56BT-E/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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