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Microchip Technology 93C56BT-E/MS
- Part No.:
- 93C56BT-E/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
93C56BT-E/MS.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,356
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Product details
Overview
93C56BT-E/MS from Microchip Technology Inc. is a 2 Kbit (256 × 8-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 4.5–5.5 V supply range, and industrial-temperature operation (–40°C to +85°C). It features self-timed erase/write cycles, automatic ERAL before WRAL, power-on/off data protection, and Ready/Busy status signaling via DO pin - deployed in embedded control firmware storage and calibration data retention for industrial sensors.
For engineers reviewing the 93C56BT-E/MS datasheet, 93C56BT-E/MS pinout, 93C56BT-E/MS application, or 93C56BT-E/MS equivalent, key selection criteria include its fixed 8-bit organization (no ORG pin), MSOP-8 package, 2 ms write cycle time, 1 million endurance cycles, and compatibility with legacy Microwire-based microcontroller peripherals requiring minimal I/O resource allocation.
Technical Context
This device implements a synchronous serial interface using CS, CLK, and DI/DO signals with start-bit detection and opcode-driven command execution. It supports READ, WRITE, ERASE, ERAL, WRAL, EWEN, and EWDS instructions with precise timing requirements including TCSL ≥250 ns and TWC = 2 ms for 93C-series write operations.
Memory architecture uses CMOS floating-gate technology enabling nonvolatile storage with >200-year data retention. Power management includes automatic standby entry on CS low and POR circuitry that inhibits all operations below VCC = 3.8 V - ensuring robustness during brown-out conditions in industrial power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit) - fixed x8 organization; no ORG pin functionality |
| VCC range | 4.5 V to 5.5 V - requires stable 5 V rail; disables all operations below 3.8 V |
| Write cycle time | 2 ms - self-timed; initiated by rising CLK edge on last data bit |
| Endurance | 1,000,000 erase/write cycles - specified at 25°C, VCC = 5.0 V |
| Data retention | >200 years - guaranteed under industrial temperature conditions |
| Interface | Microwire-compatible 3-wire serial - CS, CLK, DI/DO; no SPI mode support |
| Temp range | –40°C to +85°C (Industrial grade) - validated across full VCC range |
Pinout & Package
8-pin MSOP (150 mil) package with exposed pad (optional VSS connection), Pb-free Matte Tin finish. Pin 1 marked by laser dot; pin 1 corner defined per JEDEC MO-187.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-high enable; must be held low ≥250 ns between commands; resets internal logic when low |
| 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; high-impedance when not selected |
| 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 for all I/O and internal circuitry; connects to exposed pad in MSOP |
| 6 (NC) | No Connect | Internally unconnected; must be left floating or tied to VSS per layout best practice |
| 7 (ORG) | Organization Select | Not present on 93C56A/B variants - NC function confirmed for this part number |
| 8 (VCC) | Power Supply | 4.5–5.5 V supply; POR threshold at 3.8 V ensures safe reset during undervoltage |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates external timing control; 2 ms cycle completes autonomously after CLK-triggered initiation |
| Ready/Busy status on DO | Enables polling-based firmware flow control without interrupt or timeout overhead |
| Auto-ERAL before WRAL | Guarantees clean memory state prior to full-array write - prevents partial-data corruption |
| Power-on/off data protection | Hardware-level lockout below 3.8 V prevents inadvertent writes during power ramp-up/down |
| Erase/write disable/enable (EWDS/EWEN) | Explicit command sequence required before programming - adds software-controlled write safety layer |
Applications
| Industrial Sensor Calibration Storage | Embedded Controller Firmware Bootloader |
|---|---|
Use Scenario: Storing factory-trimmed sensor offset/gain coefficients in HVAC temperature transmitters operating at –40°C to +85°C. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during power-up initialization via Microwire interface. Use Value: Ensures consistent measurement accuracy across product lifetime without battery backup or external supervision. | Use Scenario: Holding bootloader code and configuration flags in programmable logic controllers (PLCs) with limited PCB real estate. IC Role / Device Role / Timing Role: Serial boot memory mapped into microcontroller address space via GPIO bit-banged Microwire. Use Value: Enables field firmware updates while maintaining strict I/O pin count constraints in compact industrial modules. |
| Smart Meter Energy Parameter Logging | Medical Diagnostic Device Configuration |
Use Scenario: Recording tariff schedules and metering constants in ANSI C12.22-compliant electricity meters deployed in utility substations. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage of regulatory-mandated parameters with hardware write protection. Use Value: Meets IEC 62056-21 data integrity requirements through EWEN/EWDS command enforcement and POR lockout. | Use Scenario: Saving user-selectable diagnostic modes and calibration profiles in portable ultrasound imaging units. IC Role / Device Role / Timing Role: Low-power, high-reliability configuration store accessed only during device startup or mode change. Use Value: Achieves >200-year data retention essential for Class II medical devices with multi-decade service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93C56B-I/MS | 128 × 16-bit organization; same VCC range, package, and timing; no ORG pin | Requires 16-bit data path alignment; incompatible with existing 8-bit firmware drivers | Select only if system bus width and firmware support 16-bit word access |
| 93LC56A-I/MS | 2.5–5.5 V VCC range; identical 256 × 8-bit organization; same pinout and instruction set | Supports wider voltage range including 3.3 V systems; lower minimum VCC enables mixed-voltage designs | Preferred for new 3.3 V designs; verify brown-out immunity at 2.5 V in target application |
Compared with 93C56B-I/MS, 93C56BT-E/MS provides native 8-bit compatibility without rework; versus 93LC56A-I/MS, it trades wider VCC flexibility for higher noise margin and tighter 5 V rail stability in industrial environments.
Availability
93C56BT-E/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded controller firmware storage, and smart meter energy parameter logging requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 93C56BT-E/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, with global design and manufacturing operations.
The 93Cxx EEPROM family was designed specifically for cost-sensitive, low-power, nonvolatile memory applications in industrial, automotive, and consumer systems requiring Microwire-compatible serial interfaces and high reliability.
FAQ
What is the memory organization of the 93C56BT-E/MS?
The 93C56BT-E/MS is a fixed 256 × 8-bit (2 Kbit) EEPROM with no ORG pin - unlike 'C' variants, it does not support x16 configuration. Its organization is hardwired to 8-bit words, simplifying firmware integration in systems with byte-oriented data structures. This matches the 'A' version designation in Microchip's 93C56A/B/C family documentation.
Does the 93C56BT-E/MS require an external pull-up resistor on the DO pin?
No, the 93C56BT-E/MS does not require an external pull-up on DO. The DO pin actively drives high/low during READ and Ready/Busy status reporting, and enters High-Z when deselected or idle. A pull-up may cause bus contention if DI and DO are shorted - Microchip recommends a series resistor if shared-line topology is used, but not a pull-up.
Can the 93C56BT-E/MS operate reliably at 3.3 V?
No, the 93C56BT-E/MS cannot operate at 3.3 V. Its specified VCC range is strictly 4.5 V to 5.5 V, and its power-on reset (POR) threshold is 3.8 V. Attempting operation at 3.3 V will inhibit all functions including READ, and may result in undefined behavior or data corruption. For 3.3 V systems, consider the 93LC56A-I/MS instead.
How is write protection implemented on the 93C56BT-E/MS?
Write protection on the 93C56BT-E/MS is enforced through three hardware and command-based mechanisms: (1) POR lockout below 3.8 V, (2) Erase/Write Disable (EWDS) state at power-up, and (3) requirement of explicit EWEN command before any ERASE or WRITE. The 93C56BT-E/MS remains in EWDS until EWEN is issued, preventing accidental writes during noise events or firmware glitches.
What is the maximum clock frequency supported by the 93C56BT-E/MS?
The 93C56BT-E/MS supports a maximum clock frequency of 3 MHz when VCC is 4.5–5.5 V. This is specified in Table 1-2 (A1 parameter) for 93C-series devices. Timing margins tighten at lower VCC, but since 93C56BT-E/MS operates only within 4.5–5.5 V, 3 MHz is the guaranteed maximum for compliant operation across its full temperature range.
93C56BT-E/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:
- 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:
- 8-MSOP
93C56BT-E/MS FAQ
1.How can I place an order for 93C56BT-E/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C56BT-E/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 93C56BT-E/MS reliable?
The price and inventory of 93C56BT-E/MS 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/MS is usually 5 days.
3.What payment methods are accepted for 93C56BT-E/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C56BT-E/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C56BT-E/MS?
93C56BT-E/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C56BT-E/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 93C56BT-E/MS?
For technical support, including 93C56BT-E/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C56BT-E/MS requirements.
6.How does Aetrix verify that 93C56BT-E/MS is sourced from the original manufacturer or authorized distributors?
All 93C56BT-E/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 93C56BT-E/MS meets industry standards.
7.What is the process for return or replacement of 93C56BT-E/MS?
All 93C56BT-E/MS units undergo pre-shipment inspection (PSI). If there is an issue with 93C56BT-E/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 93C56BT-E/MS part is unused and in its original packaging.
Return procedure for 93C56BT-E/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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