My Inquiry
My Account
Microchip Technology 93C56BT-I/MS
- Part No.:
- 93C56BT-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
93C56BT-I/MS.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,907
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
93C56BT-I/MS from Microchip Technology Inc. is a 2 Kbit (256 × 8-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, operating at 4.5–5.5 V, rated for industrial temperature (−40°C to +85°C), and housed in an 8-lead MSOP package. It features self-timed erase/write cycles, automatic ERAL before WRAL, and power-on/off data protection - deployed in embedded control firmware storage and calibration parameter retention.
For engineers reviewing the 93C56BT-I/MS datasheet, 93C56BT-I/MS pinout, 93C56BT-I/MS application, or 93C56BT-I/MS equivalent, key selection criteria include its fixed 8-bit organization (no ORG pin), 2 ms typical write cycle time, 1 million endurance cycles, 200-year data retention, and compatibility with legacy Microwire-based microcontroller peripherals.
Technical Context
The 93C56BT-I/MS implements a synchronous serial interface using CS, CLK, and DI/DO signals with start-bit detection and opcode-driven command execution. Its memory array is organized as 256 words × 8 bits, with no ORG pin (dedicated 'A' version), eliminating external configuration logic required by 'C' variants.
It supports full instruction set including READ, WRITE, ERASE, ERAL, WRAL, EWEN, and EWDS, with Ready/Busy status signaled via DO pin during programming. Write operations are initiated by rising edge of CLK on last data bit (93C-series behavior), and VCC must be ≥4.5 V for ERAL/WRAL functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit); fixed x8 organization - no ORG pin needed, simplifying PCB layout and firmware initialization. |
| VCC range | 4.5 V to 5.5 V; requires stable 5 V rail - not compatible with 3.3 V systems without level shifting. |
| Write cycle time | 2 ms typical; enables fast field updates while maintaining EEPROM reliability under repeated writes. |
| Endurance | 1,000,000 erase/write cycles; supports long-life logging or configuration storage in industrial controllers. |
| Data retention | 200 years at 25°C; ensures calibration data integrity across product lifetime without refresh. |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO); interoperable with legacy PIC® MCU peripherals and simple GPIO bit-banging. |
| Temp range | −40°C to +85°C (Industrial grade); validated for use in motor drives, HVAC controls, and factory automation equipment. |
Pinout & Package
8-lead MSOP (Micro Small Outline Package), 3.0 mm × 3.0 mm body, 0.65 mm pitch, exposed pad optional (not electrically connected per datasheet).
| 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 mode. |
| 2 (CLK) | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcodes, addresses, and data; stops freely during transmission. |
| 3 (DI) | Data Input | Accepts start bit, opcodes, addresses, and write data; high-impedance when not selected. |
| 4 (DO) | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z when CS is low or after status polling. |
| 5 (VSS) | Ground | Reference return path for all I/O and internal circuitry; must be low-impedance connection. |
| 6 (NC) | No Connect | Internally unconnected; must be left floating or tied to VSS per layout best practice - no routing required. |
| 7 (ORG) | Organization Select | Not present on 93C56A/B devices; pin 7 is NC - no external logic or pull-up/down needed. |
| 8 (VCC) | Power Supply | 4.5–5.5 V supply; includes internal POR at 3.8 V threshold - prevents spurious writes during power ramp. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates external timing control - firmware only needs to poll DO for completion, reducing CPU overhead. |
| Automatic ERAL before WRAL | Guarantees clean memory state before bulk write - prevents partial-write corruption without software intervention. |
| Power-on/off data protection | Hardware-enforced write inhibition below 3.8 V VCC - prevents data loss during brown-out or hot-plug events. |
| Erase/Write Enable/Disable (EWEN/EWDS) | Explicit lock/unlock mechanism - avoids accidental overwrites in field-upgrade scenarios or debug sessions. |
| Sequential read function | Enables efficient block reads with single CS assertion - reduces transaction overhead for firmware image verification. |
Applications
| Motor Control Calibration Storage | Industrial PLC Configuration Memory |
|---|---|
Use Scenario: Storing motor winding resistance offsets, PID tuning parameters, and thermal derating tables in servo drive firmware. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed during boot and runtime recalibration; retains values across power cycles. Use Value: Enables field-adjustable performance without reprogramming flash - supports OEM-specific tuning and service-level recalibration. | Use Scenario: Holding user-defined I/O mapping, ladder logic scan settings, and alarm thresholds in modular PLC backplanes. IC Role / Device Role / Timing Role: Dedicated configuration EEPROM interfaced via dedicated Microwire peripheral; updated only during commissioning or maintenance. Use Value: Decouples hardware design from software configuration - allows same PLC base unit to support multiple machine variants. |
| Medical Device Safety Parameter Archive | Automotive Body Control Module NVM |
Use Scenario: Archiving critical safety limits (e.g., maximum infusion rate, pressure cutoffs) in portable infusion pumps with regulatory audit trail requirements. IC Role / Device Role / Timing Role: Tamper-resistant, long-retention storage for immutable safety-critical values; write-protected via EWDS after initial setup. Use Value: Meets IEC 62304 traceability requirements - provides verifiable, non-erasable parameter history independent of main MCU firmware. | Use Scenario: Storing seat position presets, mirror fold/unfold profiles, and lighting dimming curves in automotive BCMs. IC Role / Device Role / Timing Role: Low-power serial EEPROM accessed during vehicle wake-up; retains user preferences across ignition cycles. Use Value: Supports personalization features without increasing main MCU flash wear - extends lifetime of primary program memory. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC56BT-I/MS | 2.5–5.5 V VCC range; supports wider supply tolerance; identical pinout and instruction set. | Enables direct drop-in replacement in 3.3 V–5 V mixed-rail designs where 93C56BT-I/MS would require level shifters. | Select when system VCC varies or shares 3.3 V domain; verify timing margins at lower voltage. |
| AT25020B-MAHL-T | SPI interface (4-wire), 1.8–5.5 V, 2 Kbit x8; no ERAL/WRAL; uses WREN/WRDI instead of EWEN/EWDS. | Lacks auto-erase-all and write-all commands; requires explicit erase before write - increases firmware complexity for bulk updates. | Choose for SPI-native systems seeking broader vendor availability; accept added software overhead for erase management. |
Compared with 93LC56BT-I/MS, the 93C56BT-I/MS offers tighter VCC regulation but higher noise immunity at 5 V; versus AT25020B-MAHL-T, it delivers simpler bulk-write sequencing and legacy Microwire compatibility at the cost of interface flexibility.
Availability
93C56BT-I/MS is available at Aetrix Electronics and suitable for motor control calibration storage, industrial PLC configuration memory, and medical device safety parameter archive requiring stable component supply across extended production lifecycles.
Supply support for 93C56BT-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, serving industrial, automotive, and consumer markets globally.
The 93Cxx series was designed specifically for cost-sensitive, low-pin-count embedded systems needing reliable, easy-to-integrate serial EEPROM with Microwire compatibility and robust data retention.
FAQ
What is the memory organization of the 93C56BT-I/MS?
The 93C56BT-I/MS is a fixed 256 × 8-bit (2 Kbit) organization device - designated as an 'A' version - with no ORG pin. This eliminates external configuration logic and ensures deterministic 8-bit data transfers without runtime reconfiguration, making it ideal for legacy Microwire host interfaces.
Does the 93C56BT-I/MS require an external pull-up resistor on the DO pin?
No, the 93C56BT-I/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. Pull-ups may interfere with valid low-state signaling during busy indication.
Can the 93C56BT-I/MS operate at 3.3 V?
No, the 93C56BT-I/MS has a specified VCC range of 4.5 V to 5.5 V only. Attempting operation at 3.3 V will fail power-on reset (POR triggers at 3.8 V) and prevent reliable communication or write execution. Use 93LC56BT-I/MS for 3.3 V compatibility.
How is write protection implemented on the 93C56BT-I/MS?
Write protection on the 93C56BT-I/MS is enforced through dual mechanisms: hardware POR lockout below 3.8 V VCC, and software-controlled EWEN/EWDS commands. After power-up, the device defaults to EWDS (write disabled); an explicit EWEN instruction is mandatory before any ERASE or WRITE operation.
What is the purpose of the NC pin (pin 6) on the 93C56BT-I/MS MSOP package?
Pin 6 on the 93C56BT-I/MS is marked NC (No Connection) - it has no internal bond wire or circuit connection. Per Microchip's datasheet guidance, it should be left floating or tied to VSS for mechanical stability; routing or driving this pin may cause unintended electrical coupling or assembly issues.
93C56BT-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:
- 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-MSOP
93C56BT-I/MS FAQ
1.How can I place an order for 93C56BT-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C56BT-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 93C56BT-I/MS reliable?
The price and inventory of 93C56BT-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 93C56BT-I/MS is usually 5 days.
3.What payment methods are accepted for 93C56BT-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C56BT-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C56BT-I/MS?
93C56BT-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C56BT-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 93C56BT-I/MS?
For technical support, including 93C56BT-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C56BT-I/MS requirements.
6.How does Aetrix verify that 93C56BT-I/MS is sourced from the original manufacturer or authorized distributors?
All 93C56BT-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 93C56BT-I/MS meets industry standards.
7.What is the process for return or replacement of 93C56BT-I/MS?
All 93C56BT-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 93C56BT-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 93C56BT-I/MS part is unused and in its original packaging.
Return procedure for 93C56BT-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93C56BT-I/MS Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
