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Microchip Technology 93LC56BT-I/MS
- Part No.:
- 93LC56BT-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
93LC56BT-I/MS.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,186
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Product details
Overview
93LC56BT-I/MS from Microchip Technology Inc. is a 2 Kbit low-voltage serial EEPROM with 256 × 8-bit organization, MSOP-8 package, and industrial temperature range (–40°C to +85°C). It features Microwire-compatible 3-wire serial interface, self-timed erase/write cycles, automatic ERAL before WRAL, and power-on/off data protection. Used for parameter storage in embedded microcontroller systems requiring nonvolatile memory with minimal pin count.
For engineers reviewing the 93LC56BT-I/MS datasheet, 93LC56BT-I/MS pinout, 93LC56BT-I/MS application, or 93LC56BT-I/MS equivalent, key selection criteria include VCC range (2.5–5.5 V), 8-bit x256 organization, 6 ms program cycle time, Ready/Busy status via DO pin, and Pb-free MSOP-8 packaging suitable for space-constrained industrial control modules.
Technical Context
This device implements a synchronous 3-wire Microwire-compatible serial interface with CS, CLK, and DI/DO pins. It operates without an ORG pin (dedicated 8-bit mode), eliminating external configuration logic required by 'C' variants. Internal logic enforces power-on write protection and supports sequential read, ERAL, WRAL, and EWEN/EWDS command sequences.
Timing is governed by voltage-dependent clock frequency limits (up to 3 MHz at VCC ≥ 4.5 V), with guaranteed TPD ≤ 400 ns and TWC = 6 ms for erase/write. The DO pin serves dual function: serial data output during READ and Ready/Busy status indicator during programming - active high when ready, low during operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit organization, fixed x8 mode) |
| VCC range | 2.5 V to 5.5 V - supports wide supply rails including 3.3 V and 5 V systems |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - minimal GPIO usage on host MCU |
| Write endurance | 1,000,000 erase/write cycles - suitable for frequent calibration or logging applications |
| Data retention | Greater than 200 years at 25°C - ensures long-term reliability in unattended equipment |
| Program cycle time | 6 ms typical - enables predictable timing budgeting for firmware write routines |
| Operating temperature | –40°C to +85°C (Industrial grade) - validated for factory automation and motor control environments |
Pinout & Package
8-pin MSOP (Mini Small Outline Package), 3.0 mm × 3.0 mm body, 0.65 mm pitch, Pb-free Matte Tin finish. Pin 1 marked by laser dot; exposed pad optional connection to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; initiates self-timed programming 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, instruction opcodes, addresses, and write data; shares net with DO only with series resistor |
| 4 (DO) | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z when CS low or after status polling |
| 5 (VSS) | Ground | Reference return path for all signals and internal circuitry; connect to system ground plane |
| 6 (NC) | No Connect | Internally unconnected; leave floating or tie to VSS per layout best practice; no functional role |
| 7 (ORG) | Organization Select | Not present on 'A'/'B' versions - this pin is NC; no external biasing required |
| 8 (VCC) | Power Supply | 2.5–5.5 V supply input; includes internal POR detection at ~1.5 V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control or firmware delay loops; 6 ms guaranteed completion |
| Automatic ERAL before WRAL | Ensures full array readiness prior to bulk write - prevents partial-write corruption without host intervention |
| Ready/Busy status on DO | Enables polling-based write synchronization instead of fixed delays, improving system responsiveness |
| Power-on/off data protection | Hardware-level inhibition below VCC = 1.5 V prevents inadvertent writes during brown-out or power ramp |
| 1,000,000 endurance cycles | Supports daily reconfiguration over 27+ years - viable for field-upgradable firmware parameter tables |
Applications
| Motor Control Parameter Storage | Industrial Sensor Calibration Data |
|---|---|
Use Scenario: Storing PID coefficients, current limits, and encoder offset values in brushless DC motor drives. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed during boot and runtime via MCU SPI-like interface. Use Value: Enables field recalibration without firmware reflashing; retains settings across power cycles and thermal stress. | Use Scenario: Holding factory-trimmed gain/offset values for analog temperature and pressure sensors in PLC I/O modules. IC Role / Device Role / Timing Role: Dedicated 8-bit serial EEPROM interfaced to sensor signal chain MCU for one-time calibration load. Use Value: Reduces production test time by storing calibrated coefficients; eliminates need for external trim pots or OTP fuses. |
| Medical Device Configuration | Smart Energy Meter Firmware Settings |
Use Scenario: Saving user-configurable alarm thresholds, display brightness, and audit log flags in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, low-power configuration store accessed only during setup or exception handling. Use Value: Meets IEC 62304 data integrity requirements; 200-year retention ensures lifetime compliance without battery backup. | Use Scenario: Storing tariff schedules, meter ID, and communication protocol parameters in ANSI C12.22-compliant smart meters. IC Role / Device Role / Timing Role: Tamper-resistant configuration memory updated infrequently but requiring guaranteed write completion. Use Value: 1M endurance supports 10+ years of firmware updates; MSOP-8 footprint fits tight meter PCB layouts. |
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/MS | 128 × 16-bit organization; same VCC range, package, and temperature grade | Requires 16-bit host interface; incompatible with existing 8-bit firmware addressing | Select only if system uses native 16-bit data paths and firmware supports x16 addressing |
| AT25020B-MAHL-T | SPI interface (4-wire), 2 Kbit, 1.8–5.5 V, SOIC-8 package; no ORG pin; 5 ms write cycle | Requires additional chip select line; different command set and timing; not Microwire-compatible | Choose for SPI-native designs where pin count allows fourth signal; verify command mapping and status polling method |
Compared with 93LC56B-I/MS, the 93LC56BT-I/MS provides native 8-bit addressing without firmware reinterpretation; versus AT25020B-MAHL-T, it offers Microwire compatibility and tighter timing control for legacy MCU peripherals lacking SPI hardware.
Availability
93LC56BT-I/MS is available at Aetrix Electronics and suitable for industrial control, motor drive, medical instrumentation, and smart metering applications requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for 93LC56BT-I/MS 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.
The 93LC56 series belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-pin-count embedded systems needing reliable nonvolatile storage with minimal MCU resource overhead.
FAQ
What is the memory organization of the 93LC56BT-I/MS?
The 93LC56BT-I/MS is a dedicated 8-bit device with 256 × 8-bit organization (2 Kbit total). It does not include an ORG pin - unlike 'C' variants - so no external configuration is needed to select word size. This simplifies design and eliminates risk of misconfiguration during board bring-up. The 93LC56BT-I/MS operates exclusively in x8 mode.
Does the 93LC56BT-I/MS require an EWEN command before every write operation?
Yes, the 93LC56BT-I/MS powers up in Erase/Write Disable (EWDS) mode. An EWEN instruction must be issued before the first ERASE or WRITE command in each power cycle. Subsequent writes remain enabled until EWDS is sent or VCC is removed. This hardware-enforced write protection prevents accidental overwrites during noise events or reset glitches affecting the 93LC56BT-I/MS.
What is the maximum clock frequency supported by the 93LC56BT-I/MS at 3.3 V?
At VCC = 3.3 V (within 2.5–5.5 V range), the 93LC56BT-I/MS supports a maximum clock frequency of 2 MHz. This is specified in Table 1-2 (A1) for 2.5 V ≤ VCC < 5.5 V. Exceeding this limit may cause command misreads or incomplete write cycles, compromising data integrity in the 93LC56BT-I/MS.
Can the DO pin of the 93LC56BT-I/MS be used for both data output and Ready/Busy status?
Yes - the DO pin serves dual function. During READ operations, it outputs serial data bits. During ERASE, WRITE, ERAL, or WRAL commands, it asserts Ready/Busy status: logic low indicates ongoing operation, high indicates completion. To read status, CS must be brought high for ≥250 ns after initiating the command; the 93LC56BT-I/MS then drives DO accordingly.
Is the 93LC56BT-I/MS compatible with standard Microwire controllers?
Yes, the 93LC56BT-I/MS is fully Microwire-compatible, implementing the standard 3-wire interface (CS, CLK, DI/DO) with identical instruction set, timing, and signaling conventions. It requires no special initialization or mode registers - host controllers designed for Microwire EEPROMs will operate the 93LC56BT-I/MS without modification.
93LC56BT-I/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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:
- 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-MSOP
93LC56BT-I/MS FAQ
1.How can I place an order for 93LC56BT-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC56BT-I/MS 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/MS reliable?
The price and inventory of 93LC56BT-I/MS 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/MS is usually 5 days.
3.What payment methods are accepted for 93LC56BT-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC56BT-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC56BT-I/MS?
93LC56BT-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC56BT-I/MS 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/MS?
For technical support, including 93LC56BT-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC56BT-I/MS requirements.
6.How does Aetrix verify that 93LC56BT-I/MS is sourced from the original manufacturer or authorized distributors?
All 93LC56BT-I/MS 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/MS meets industry standards.
7.What is the process for return or replacement of 93LC56BT-I/MS?
All 93LC56BT-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 93LC56BT-I/MS, 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/MS part is unused and in its original packaging.
Return procedure for 93LC56BT-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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