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Microchip Technology 93C56BT-I/SN
- Part No.:
- 93C56BT-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93C56BT-I/SN.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,418
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Product details
Overview
93C56BT-I/SN 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 rating (–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 for configuration storage in embedded microcontroller systems.
For engineers reviewing the 93C56BT-I/SN datasheet, 93C56BT-I/SN pinout, 93C56BT-I/SN application, or 93C56BT-I/SN equivalent, key selection considerations include its fixed 8-bit organization (no ORG pin), 2 ms write cycle time, 1 million endurance cycles, 200-year data retention, and SOIC-8 (SN) package compatibility with legacy board layouts.
Technical Context
The 93C56BT-I/SN implements a synchronous serial Microwire interface with CS, CLK, and DI/DO pins. It uses a dedicated 8-bit memory map (256 × 8) with no ORG pin - distinguishing it from C-variant devices. All instructions (READ, WRITE, ERASE, ERAL, WRAL, EWEN/EWDS) are initiated by a Start bit followed by opcode and address/data on rising CLK edges.
Write operations are self-timed and auto-erase enabled; for 93C-series devices, the rising edge of CLK on the final data bit triggers the internal 2 ms programming cycle. Power-supply-based write inhibition activates below 3.8 V, and the device powers up in EWDS (Erase/Write Disable) mode for data integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit organization; no ORG pin) |
| VCC range | 4.5 V to 5.5 V - requires stable 5 V rail; disables write below 3.8 V |
| Write cycle time | 2 ms - fixed duration for all erase/write operations; no external timing control needed |
| Endurance | 1,000,000 erase/write cycles - supports frequent firmware or calibration updates |
| Data retention | 200 years at 25°C - suitable for long-lifecycle industrial deployments |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - minimal GPIO usage on host MCU |
| Temp range | –40°C to +85°C (Industrial grade) - validated for non-automotive embedded environments |
Pinout & Package
93C56BT-I/SN is supplied in an 8-lead SOIC package (SN suffix), with standard pinout matching industry Microwire EEPROMs. The ORG pin is not present (NC) on A/B variants like this part.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS | Chip Select | Active-high enable; must be held low ≥250 ns between commands; initiates instruction execution on high-to-low transition after Start bit |
| 2 CLK | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcode/address/data; stopped mid-cycle without error |
| 3 DI | Data Input | Receives Start bit, opcodes, addresses, and write data; shares net with DO only with series resistor to prevent bus conflict |
| 4 DO | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z when CS low or during non-read states |
| 5 VSS | Ground | Reference return path for all I/O and core logic; must be low-impedance |
| 6 NC | No Connect | Unused pin; internally unconnected - leave floating or tie to GND per layout best practice |
| 7 NC | No Connect | Placeholder for family pin compatibility; no internal connection; do not route |
| 8 VCC | Power Supply | 4.5–5.5 V supply; voltage detect circuit blocks writes below 3.8 V to prevent corruption |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control or polling delay loops - simplifies firmware driver design |
| Automatic ERAL before WRAL | Ensures full array erase prior to bulk write, preventing partial-data corruption in configuration recovery sequences |
| Power-on/off data protection | Hardware-level VCC monitoring prevents writes during brown-out or power ramp - no software lock required |
| Ready/Busy status on DO | Enables efficient polling without additional status lines; reduces pin count vs. parallel EEPROMs |
| 1,000,000 endurance cycles | Supports >100 daily writes over 27 years - sufficient for field-updatable calibration or logging applications |
Applications
| Motor Control Configuration | Industrial Sensor Calibration |
|---|---|
Use Scenario: Storing motor phase timing offsets, current limits, and PID coefficients in servo drives. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed at boot and updated during field calibration. Use Value: Enables factory and field recalibration without firmware reflash; retains settings across 200+ year lifecycle. | Use Scenario: Holding sensor-specific gain/offset trim values and linearization tables in pressure or temperature transmitters. IC Role / Device Role / Timing Role: Dedicated 8-bit serial storage for analog front-end calibration parameters. Use Value: Reduces BOM cost vs. flash-based MCU solutions; eliminates need for external ADC reference trimming hardware. |
| Legacy MCU System Bootloader | Power Supply Sequencing Setup |
Use Scenario: Storing bootloader jump vectors, firmware version flags, and secure boot keys in 8-bit microcontroller systems. IC Role / Device Role / Timing Role: External boot configuration store interfaced via hardware SPI/Microwire peripheral. Use Value: Decouples boot logic from main MCU flash; allows safe firmware rollback and dual-bank update schemes. | Use Scenario: Configuring power sequencing delays, voltage thresholds, and fault response modes in multi-rail DC/DC systems. IC Role / Device Role / Timing Role: Persistent setup register for PMIC or discrete sequencer ICs. Use Value: Enables one-time system tuning during production test; survives repeated power cycling without drift. |
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/SN | 128 × 16-bit organization; same VCC range, timing, and package | Requires 16-bit host interface; incompatible with 8-bit address/data framing | Select only if host MCU natively supports 16-bit Microwire transfers and memory map aligns |
| AT25020B-MAHL-T | SPI interface (4-wire), 2 Kbit, 1.8–5.5 V, 5 MHz max clock | Requires SPI peripheral instead of Microwire; different command set and status reporting | Choose for designs already using SPI peripherals; offers wider VCC range but no Ready/Busy pin |
Compared with 93C56B-I/SN, the 93C56BT-I/SN provides native 8-bit addressing ideal for byte-oriented MCU firmware; versus AT25020B-MAHL-T, it retains Microwire compatibility and hardware Ready/Busy signaling - critical for deterministic timing in resource-constrained systems.
Availability
93C56BT-I/SN is available at Aetrix Electronics and suitable for motor control configuration, industrial sensor calibration, legacy MCU bootloader storage, and power supply sequencing setup requiring stable component supply and long-term obsolescence management.
Supply support for 93C56BT-I/SN 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 manufacturing and support infrastructure.
The 93Cxx EEPROM product line delivers cost-optimized, low-power serial nonvolatile memory for embedded configuration and calibration storage - designed specifically for interoperability with legacy Microwire controllers and industrial-grade reliability requirements.
FAQ
What is the memory organization of the 93C56BT-I/SN?
The 93C56BT-I/SN has a fixed 256 × 8-bit organization with no ORG pin. It belongs to the 'A' variant of the 93C56 family, meaning word size is permanently set to 8 bits - unlike 'C' variants that use the ORG pin for dynamic 8/16-bit selection. This simplifies interface design for 8-bit microcontrollers.
Does the 93C56BT-I/SN support 3.3 V operation?
No, the 93C56BT-I/SN does not support 3.3 V operation. Its specified VCC range is strictly 4.5 V to 5.5 V. Below 4.5 V - and especially below the 3.8 V power-on reset threshold - write operations are disabled to prevent data corruption. For 3.3 V systems, consider the 93LC56A-I/SN or 93AA56A-I/SN variants instead.
How is the Ready/Busy status signaled on the 93C56BT-I/SN?
The 93C56BT-I/SN signals Ready/Busy status on the DO pin: DO = low indicates an erase or write operation is in progress; DO = high means the device is ready for the next command. To read status, CS must be brought high for ≥250 ns after initiating the operation - DO then reflects status until CS goes low again.
What is the purpose of the NC pins on the 93C56BT-I/SN SOIC package?
Pins 6 and 7 on the 93C56BT-I/SN (SOIC-8) are marked NC (No Connect) - they have no internal connection and serve only for mechanical compatibility across the 93XX56 family. Pin 6 replaces the ORG pin found on 'C' variants; Pin 7 replaces the NC position used in rotated SOIC variants. Neither pin should be routed or tied externally.
Is the 93C56BT-I/SN RoHS compliant and Pb-free?
Yes, the 93C56BT-I/SN is Pb-free and RoHS compliant, with a Matte Tin (Sn) finish on all leads. This is confirmed in the device features list and packaging documentation. The 'T' in the part number denotes Pb-free compliance per Microchip's standard marking convention.
93C56BT-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
93C56BT-I/SN FAQ
1.How can I place an order for 93C56BT-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C56BT-I/SN 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-I/SN reliable?
The price and inventory of 93C56BT-I/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93C56BT-I/SN is usually 5 days.
3.What payment methods are accepted for 93C56BT-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C56BT-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C56BT-I/SN?
93C56BT-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C56BT-I/SN 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-I/SN?
For technical support, including 93C56BT-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C56BT-I/SN requirements.
6.How does Aetrix verify that 93C56BT-I/SN is sourced from the original manufacturer or authorized distributors?
All 93C56BT-I/SN 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-I/SN meets industry standards.
7.What is the process for return or replacement of 93C56BT-I/SN?
All 93C56BT-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93C56BT-I/SN, 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-I/SN part is unused and in its original packaging.
Return procedure for 93C56BT-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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