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Microchip Technology 93C56BT-E/ST
- Part No.:
- 93C56BT-E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
93C56BT-E/ST.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,467
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Product details
Overview
93C56BT-E/ST 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 - used in embedded system configuration storage, sensor calibration retention, and firmware parameter backup.
For engineers reviewing the 93C56BT-E/ST datasheet, 93C56BT-E/ST pinout, 93C56BT-E/ST application, or 93C56BT-E/ST equivalent, key selection considerations include its fixed 8-bit organization (no ORG pin), TSSOP-8 package, 2 ms write cycle time, 1 million endurance cycles, and compatibility with legacy Microwire controllers in cost-sensitive industrial control modules.
Technical Context
This device implements a synchronous serial interface using CS, CLK, and DI/DO lines with start-bit detection and opcode-based command decoding. It supports READ, WRITE, ERASE, ERAL, WRAL, EWEN, and EWDS instructions with strict timing requirements including TCSL ≥250 ns and TWC = 2 ms for 93C-series write operations.
Internal logic includes address counter, mode decode, output buffer, and power-on reset circuitry that inhibits all operations below VCC = 3.8 V. The DO pin serves dual function: serial data output during READ and Ready/Busy status indicator during programming - requiring CS high for ≥250 ns after TCSL to sample status.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8-bit) - fixed x8 organization; no ORG pin; no word-size reconfiguration. |
| VCC Range | 4.5 V to 5.5 V - operation disabled below 3.8 V; incompatible with 3.3 V or 2.5 V systems. |
| Write Cycle Time | 2 ms - self-timed erase-and-write; initiated by rising edge of CLK on last data bit (93C-series behavior). |
| Endurance | 1,000,000 erase/write cycles - specified at 25°C, VCC = 5.0 V; validated per Total Endurance™ Model. |
| Data Retention | 200 years - nonvolatile storage lifetime under recommended operating conditions. |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - no SPI or I²C protocol support. |
| Temperature Range | –40°C to +85°C (Industrial grade) - marked "T" in suffix; not automotive-qualified (E-grade required for –40°C to +125°C). |
Pinout & Package
93C56BT-E/ST is supplied in an 8-lead TSSOP (Thin Shrink Small Outline Package) with 0.65 mm lead pitch, Pb-free Matte Tin finish, and standard JEDEC MO-153AC footprint. Pin 1 is marked by laser dot; exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; deselects device into standby but does not abort ongoing write. |
| 2 (CLK) | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcode/address/data; stopped clock allowed pre-start condition. |
| 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 signal (low = busy); enters high-Z on CS falling edge. |
| 5 (VSS) | Ground | Reference return path for all internal logic and I/O; must be connected before VCC. |
| 6 (NC) | No Connect | Internally unconnected; must remain floating or tied to VSS per layout best practice; not usable as ORG. |
| 7 (NC) | No Connect | Internally unconnected; same handling as Pin 6; not functional in 93C56A/B variants. |
| 8 (VCC) | Power Supply | 4.5–5.5 V supply; POR circuit triggers at ~3.8 V; voltage detect disables all operations below threshold. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed Erase/Write | Eliminates external timing control; 2 ms guaranteed completion for 93C56BT-E/ST - reduces MCU firmware overhead. |
| Automatic ERAL before WRAL | Ensures full array erasure prior to bulk write; prevents partial-data corruption without host software intervention. |
| Power-On/Off Data Protection | Hardware lockout below 3.8 V VCC prevents inadvertent writes during brown-out or power ramp-up sequences. |
| Ready/Busy Status via DO | Enables polling-based write completion detection without interrupt or timer dependency - simplifies driver design. |
| Sequential Read Mode | Continuous data streaming across memory addresses while CS remains high - optimizes parameter table reads. |
Applications
| Industrial PLC Configuration Storage | Smart Sensor Calibration Memory |
|---|---|
|
Use Scenario: Storing I/O mapping, scaling coefficients, and alarm thresholds in programmable logic controllers during factory commissioning and field updates. IC Role / Device Role / Timing Role: Nonvolatile configuration register bank accessed via Microwire interface during boot and maintenance mode. Use Value: 256 × 8-bit capacity matches typical PLC parameter sets; 1M endurance supports >10 years of daily firmware updates. |
Use Scenario: Retaining temperature-compensated offset/gain values for analog sensor front-ends in HVAC and process monitoring units. IC Role / Device Role / Timing Role: Calibration data repository written once per sensor calibration cycle and read at power-up. Use Value: 200-year data retention ensures calibration integrity over product lifetime without battery backup. |
| Firmware Parameter Backup | Legacy Industrial Controller Upgrade Module |
|
Use Scenario: Preserving user-modified settings (e.g., baud rate, network ID, watchdog timeout) across MCU firmware upgrades in embedded gateways. IC Role / Device Role / Timing Role: Standalone parameter store decoupled from main microcontroller flash - enables safe in-field updates. Use Value: Fixed 8-bit interface avoids ORG pin routing complexity; TSSOP-8 footprint fits space-constrained upgrade PCBs. |
Use Scenario: Retrofitting legacy 5 V industrial controllers with modern nonvolatile memory where original EPROM sockets are unavailable. IC Role / Device Role / Timing Role: Drop-in Microwire-compatible replacement for obsolete 2K × 8-bit serial EEPROMs in aging control hardware. Use Value: Pin-compatible with standard 8-pin SOIC/TSSOP footprints; identical command set to 93C46/93C56 predecessors. |
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/ST | Same 256 × 16-bit organization, 4.5–5.5 V, TSSOP-8, but dedicated x16 interface - requires 16-bit data bus and different opcode addressing. | Used where controller supports native 16-bit Microwire transfers; incompatible with 8-bit-only host firmware. | Select only if system architecture mandates 16-bit word access and firmware already implements x16 command set. |
| 93LC56A-I/ST | 256 × 8-bit, 2.5–5.5 V, TSSOP-8, same pinout - wider VCC range enables 3.3 V operation; slower 6 ms write cycle (93LC-series). | Suitable for mixed-voltage designs; not recommended for 5 V-only systems requiring fast writes or legacy 93C timing compliance. | Prefer for new 3.3 V designs needing broader supply tolerance; avoid when strict 2 ms write timing or 5 V-only operation is required. |
Compared with 93C56B-I/ST and 93LC56A-I/ST, the 93C56BT-E/ST delivers deterministic 2 ms write performance at 5 V and guarantees compatibility with legacy 93C-timed controllers, making it optimal for retrofit and industrial 5 V systems where timing predictability and voltage margin are critical.
Availability
93C56BT-E/ST is available at Aetrix Electronics and suitable for industrial automation, sensor calibration, and firmware parameter backup applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 93C56BT-E/ST 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 design and manufacturing operations.
The 93Cxx family was designed specifically for cost-sensitive, low-power serial EEPROM applications in industrial and consumer systems requiring Microwire interface compatibility and robust data retention.
FAQ
What is the memory organization of the 93C56BT-E/ST?
The 93C56BT-E/ST has a fixed 256 × 8-bit (2 Kbit) organization with no ORG pin - unlike 'C' variants, it does not support x16 configuration. This makes it software- and hardware-compatible with legacy 8-bit Microwire EEPROM implementations and eliminates need for external ORG pin biasing.
Does the 93C56BT-E/ST support 3.3 V operation?
No, the 93C56BT-E/ST requires 4.5 V to 5.5 V supply voltage and incorporates a 3.8 V power-on reset threshold. Operation below 4.5 V is not guaranteed; for 3.3 V systems, consider the 93LC56A-I/ST or 93AA56A-I/ST instead.
How is the Ready/Busy status monitored on the 93C56BT-E/ST?
The DO pin outputs Ready/Busy status during erase/write cycles: logical low indicates active programming, high indicates completion. To read status, CS must be brought high for ≥250 ns after TCSL - then sample DO on CLK rising edge. Status clears automatically after successful completion.
What is the write endurance and data retention of the 93C56BT-E/ST?
The 93C56BT-E/ST is rated for 1,000,000 erase/write cycles at 25°C, VCC = 5.0 V, and provides 200 years of data retention under normal operating conditions. These values are characterized per Microchip's Total Endurance™ Model and apply to the full 256-byte memory array.
Is the 93C56BT-E/ST pin-compatible with other 93C56 variants in TSSOP-8?
Yes - the 93C56BT-E/ST shares identical TSSOP-8 pinout and mechanical footprint with 93C56A-I/ST, 93C56B-I/ST, and 93C56C-I/ST. However, electrical behavior differs: 93C56B uses x16 interface, 93C56C supports ORG-selectable organization, and only 93C56A/B match the fixed x8 timing and command set of 93C56BT-E/ST.
93C56BT-E/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm 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-TSSOP
93C56BT-E/ST FAQ
1.How can I place an order for 93C56BT-E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C56BT-E/ST 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/ST reliable?
The price and inventory of 93C56BT-E/ST 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/ST is usually 5 days.
3.What payment methods are accepted for 93C56BT-E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C56BT-E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C56BT-E/ST?
93C56BT-E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C56BT-E/ST 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/ST?
For technical support, including 93C56BT-E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C56BT-E/ST requirements.
6.How does Aetrix verify that 93C56BT-E/ST is sourced from the original manufacturer or authorized distributors?
All 93C56BT-E/ST 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/ST meets industry standards.
7.What is the process for return or replacement of 93C56BT-E/ST?
All 93C56BT-E/ST units undergo pre-shipment inspection (PSI). If there is an issue with 93C56BT-E/ST, 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/ST part is unused and in its original packaging.
Return procedure for 93C56BT-E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93C56BT-E/ST Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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