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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Microchip Technology 93C56C-E/MS

Name: 93C56C-E/MS
Brand: Microchip Technology
SKU: 93C56C-E/MS
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 93C56C-E/MS

Manufacturer:: Microchip Technology

Category:: Memory

Package:: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)

Datasheet:: 93C56C-E/MS.pdf

Description:: IC EEPROM 2KBIT MICROWIRE 8MSOP

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Product details

Overview

93C56C-E/MS from Microchip Technology Inc. is a 2 Kbit Microwire-compatible serial EEPROM with configurable 8-/16-bit word organization via the ORG pin, 4.5–5.5 V supply range, industrial and automotive temperature support (−40°C to +125°C), and MSOP-8 package. It delivers self-timed erase/write cycles, automatic ERAL/WRAL, and Ready/Busy status signaling for embedded system configuration storage.

For engineers reviewing the 93C56C-E/MS datasheet, 93C56C-E/MS pinout, 93C56C-E/MS application, or 93C56C-E/MS equivalent, key selection considerations include ORG-pin-dependent memory width, 2 ms write cycle time, 1 million endurance cycles, 200-year data retention, and compatibility with legacy Microwire controllers in space-constrained industrial control modules.

Technical Context

The 93C56C-E/MS implements a synchronous 3-wire Microwire interface (CS, CLK, DI/DO) with start-bit detection and opcode-driven command execution. Its dual-word-size architecture relies on external logic applied to the ORG pin-VCC selects 128 × 16-bit mode, VSS selects 256 × 8-bit mode-enabling flexible data bus alignment without hardware redesign.

Internal operation includes auto-erase-before-write, dedicated EWEN/EWDS protection states, and DO pin multiplexing for both read data output and Ready/Busy polling. Write initiation differs from AA/LC variants: for 93C56C-E/MS, the rising edge of CLK on the final data bit triggers the self-timed 2 ms programming cycle, not the CS falling edge.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory size	2 Kbit (256 × 8 or 128 × 16, selectable via ORG pin)
V_CC range	4.5 V to 5.5 V - ensures stable operation in 5 V systems with marginal rail tolerance
Write cycle time	2 ms - fixed duration for all erase/write operations, enabling deterministic timing in firmware
Endurance	1,000,000 erase/write cycles - supports frequent field-updatable parameter storage
Data retention	200 years at 25°C - guarantees long-term nonvolatile storage without refresh
Interface	Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - interoperable with legacy microcontrollers lacking SPI peripherals
Temp range	−40°C to +125°C (Automotive E-grade) - qualified for under-hood and industrial motor drive environments

Pinout & Package

8-pin MSOP (Micro Small Outline Package), 3.0 mm × 3.0 mm body, 0.65 mm pitch, exposed pad optional (VSS or floating).

Pin/Terminal	Circuit Role	Design Meaning
CS	Chip Select	Active-high enable; must be held low ≥250 ns between instructions to reset internal state
CLK	Serial Clock	Rising-edge synchronized I/O; clock stops freely during transmission; rising edge of final CLK initiates write on 93C56C-E/MS
DI	Data Input	Accepts start bit, opcode, address, and write data; shares net with DO only with series resistor to prevent bus conflict
DO	Data Output / Status	Outputs read data or Ready/Busy (low = busy); enters High-Z when CS low or after status read
VSS	Ground	Reference for all signals; connects to exposed pad in MSOP for thermal/mechanical stability
ORG	Organization Control	Logic high → 128 × 16-bit mode; logic low → 256 × 8-bit mode; must be statically biased
NC	No Connection	Pin 7 in MSOP - no internal bond; must be left unconnected or tied to VSS for mechanical stability
VCC	Power Supply	4.5–5.5 V only; POR threshold at 3.8 V - prevents spurious writes during power ramp

Key Features

Feature	Design Value
ORG-pin word-size selection	Enables single BOM to support both 8-bit and 16-bit host interfaces without changing firmware or PCB layout
Self-timed 2 ms write cycle	Eliminates need for external timing components or software delay loops; simplifies driver implementation
Auto-erase-before-write	Guarantees clean write regardless of prior data state - no manual erase required before each write
ERAL and WRAL commands	Full-array erase (6 ms) and full-array write (15 ms) with built-in ERAL - enables factory calibration reset or firmware rollback
EWEN/EWDS security	Hardware-enforced write lock: device powers up in EWDS state; accidental overwrites prevented unless explicit EWEN issued

Applications

Industrial Sensor Calibration	Automotive ECU Configuration
Use Scenario: Storing temperature-compensation coefficients and sensor offset values in factory-calibrated pressure transmitters. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed infrequently during commissioning or recalibration. Use Value: 200-year data retention ensures calibration integrity across product lifetime without battery backup or refresh routines.	Use Scenario: Holding adaptive learning parameters (e.g., idle air control trim) in engine control units operating under hood temperatures up to +125°C. IC Role / Device Role / Timing Role: Automotive-grade EEPROM interfaced via Microwire to 8-bit MCU with limited peripheral resources. Use Value: −40°C to +125°C qualification and 1M endurance support repeated relearning cycles over 15+ years of vehicle service.
Legacy Industrial PLC I/O Module	Medical Infusion Pump Setup
Use Scenario: Retaining module identification, channel scaling factors, and safety-critical alarm thresholds in DIN-rail mounted I/O expanders using aging 8051-based controllers. IC Role / Device Role / Timing Role: Pin-compatible drop-in replacement for obsolete 93C46/93C56A devices in existing Microwire designs. Use Value: Identical instruction set and timing allows firmware reuse; MSOP-8 footprint reduces board area vs. SOIC-8 while maintaining solderability.	Use Scenario: Storing drug library profiles, dose limits, and user preferences in battery-powered infusion pumps requiring FDA-compliant data integrity. IC Role / Device Role / Timing Role: Secure configuration store with hardware write protection (EWEN/EWDS) and power-on data validation. Use Value: V_CC POR at 3.8 V prevents partial writes during brown-out; 1M endurance supports >10,000 pump setup changes over device life.

Industrial Sensor Calibration

Automotive ECU Configuration

Use Scenario: Storing temperature-compensation coefficients and sensor offset values in factory-calibrated pressure transmitters.

IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed infrequently during commissioning or recalibration.

Use Value: 200-year data retention ensures calibration integrity across product lifetime without battery backup or refresh routines.

Use Scenario: Holding adaptive learning parameters (e.g., idle air control trim) in engine control units operating under hood temperatures up to +125°C.

IC Role / Device Role / Timing Role: Automotive-grade EEPROM interfaced via Microwire to 8-bit MCU with limited peripheral resources.

Use Value: −40°C to +125°C qualification and 1M endurance support repeated relearning cycles over 15+ years of vehicle service.

Legacy Industrial PLC I/O Module

Medical Infusion Pump Setup

Use Scenario: Retaining module identification, channel scaling factors, and safety-critical alarm thresholds in DIN-rail mounted I/O expanders using aging 8051-based controllers.

IC Role / Device Role / Timing Role: Pin-compatible drop-in replacement for obsolete 93C46/93C56A devices in existing Microwire designs.

Use Value: Identical instruction set and timing allows firmware reuse; MSOP-8 footprint reduces board area vs. SOIC-8 while maintaining solderability.

Use Scenario: Storing drug library profiles, dose limits, and user preferences in battery-powered infusion pumps requiring FDA-compliant data integrity.

IC Role / Device Role / Timing Role: Secure configuration store with hardware write protection (EWEN/EWDS) and power-on data validation.

Use Value: V_CC POR at 3.8 V prevents partial writes during brown-out; 1M endurance supports >10,000 pump setup changes over device life.

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
93LC56C-E/MS	2.5–5.5 V V_CC, 6 ms write cycle, same pinout and ORG functionality	Better suited for mixed-voltage systems (e.g., 3.3 V logic with 5 V peripherals); slower write impacts high-frequency logging	Select when wider voltage margin or lower V_CC operation is required; verify 6 ms timing fits host firmware
93AA56C-E/MS	1.8–5.5 V V_CC, 6 ms write cycle, identical ORG behavior and package	Enables ultra-low-power sleep modes (<1 µA standby); not rated for 125°C operation	Choose for battery-powered portable equipment where extended temperature range is unnecessary

Compared with 93LC56C-E/MS and 93AA56C-E/MS, the 93C56C-E/MS offers the fastest 2 ms write time and highest V_CC noise immunity (3.8 V POR), making it optimal for robust 5 V industrial control where speed and reliability outweigh voltage flexibility.

Availability

93C56C-E/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive ECU configuration, and legacy PLC I/O modules requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for 93C56C-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 microcontroller, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 93Cxx EEPROM family was designed for cost-sensitive, space-constrained embedded systems needing reliable nonvolatile storage with minimal external components and compatibility with legacy Microwire controllers.

FAQ

What is the function of the ORG pin on the 93C56C-E/MS?

The ORG pin on the 93C56C-E/MS configures memory organization: tied to VCC, it selects 128 × 16-bit mode; tied to VSS, it selects 256 × 8-bit mode. This pin must be statically biased-no dynamic switching during operation. The 93C56C-E/MS requires this pin to be connected; unlike A/B versions, it is not NC. Proper ORG biasing determines address width and data bus alignment in the host system.

How does the 93C56C-E/MS differ from the 93C56A-E/MS in write timing?

The 93C56C-E/MS initiates its 2 ms self-timed write cycle on the rising edge of CLK at the final data bit, whereas the 93C56A-E/MS uses the falling edge of CS. This difference affects firmware timing margins and interrupt handling. Both share identical V_CC range (4.5–5.5 V), package, and instruction set, but the 93C56C-E/MS adds ORG-pin configurability absent in the A-version.

Is the 93C56C-E/MS pin-compatible with SOIC-8 packages?

Yes-the 93C56C-E/MS in MSOP-8 (3.0 × 3.0 mm) shares identical pin numbering and signal mapping with SOIC-8 (3.9 × 4.9 mm) variants like 93C56C-E/SN, per Microchip's DS21794G-page 12 pin function table. However, MSOP requires tighter stencil design and reflow profiling due to smaller pad pitch (0.65 mm vs. 1.27 mm) and thermal mass differences.

What is the minimum V_CC required for ERAL and WRAL operations on the 93C56C-E/MS?

The 93C56C-E/MS requires V_CC ≥ 4.5 V for proper execution of ERAL (Erase All) and WRAL (Write All) commands, as specified in DS21794G-page 8 and page 11. Below 4.5 V, these commands may fail silently or produce incomplete erasure. This threshold is higher than the general operating minimum (4.5 V), confirming that full-array operations demand nominal rail voltage.

Does the 93C56C-E/MS support sequential read mode?

Yes-the 93C56C-E/MS supports sequential read: when CS remains high after a READ instruction, the internal address counter automatically increments, and subsequent clock edges output data from consecutive memory locations on DO. This eliminates the need to resend the opcode and address for each byte/word, reducing transaction overhead in firmware drivers.

93C56C-E/MS Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)

Packaging:: Tube

Product Status:: Active

Programmable:: Not Verified

Memory Type:: Non-Volatile

Memory Format:: EEPROM

Technology:: EEPROM

Memory Size:: 2Kbit

Memory Organization:: 256 x 8, 128 x 16

Memory Interface:: Microwire

Clock Frequency:: 3 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

93C56C-E/MS FAQ

1.How can I place an order for 93C56C-E/MS through Aetrix?

Please submit a Request for Quotation (RFQ) for 93C56C-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 93C56C-E/MS reliable?

The price and inventory of 93C56C-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 93C56C-E/MS is usually 5 days.

3.What payment methods are accepted for 93C56C-E/MS?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C56C-E/MS transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 93C56C-E/MS?

93C56C-E/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 93C56C-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 93C56C-E/MS?

For technical support, including 93C56C-E/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C56C-E/MS requirements.

6.How does Aetrix verify that 93C56C-E/MS is sourced from the original manufacturer or authorized distributors?

All 93C56C-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 93C56C-E/MS meets industry standards.

7.What is the process for return or replacement of 93C56C-E/MS?

All 93C56C-E/MS units undergo pre-shipment inspection (PSI). If there is an issue with 93C56C-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 93C56C-E/MS part is unused and in its original packaging.

Return procedure for 93C56C-E/MS:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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