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Microchip Technology 93LC56CT-I/SN15KVAO
- Part No.:
- 93LC56CT-I/SN15KVAO
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC56CT-I/SN15KVAO.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,931
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Product details
Overview
93LC56CT-I/SN15KVAO from Microchip Technology Inc. is a 2 Kbit low-voltage serial EEPROM with 128 × 16-bit organization, operating across 2.5–5.5 V supply and rated for industrial temperature (−40°C to +85°C). It features Microwire-compatible 3-wire serial interface, self-timed erase/write cycles, automatic ERAL before WRAL, and Ready/Busy status via DO pin - deployed in microcontroller configuration storage and calibration data retention.
For engineers reviewing the 93LC56CT-I/SN15KVAO datasheet, 93LC56CT-I/SN15KVAO pinout, 93LC56CT-I/SN15KVAO application, or 93LC56CT-I/SN15KVAO equivalent, key selection criteria include VCC range compatibility, ORG-pin-dependent x16/x8 word size, endurance (1M cycles), data retention (>200 years), and SOIC-8 package footprint with Pb-free Matte Tin finish.
Technical Context
This device implements a synchronous 3-wire Microwire interface with CS, CLK, and DI/DO signals. It supports dedicated 16-bit communication (no ORG pin function), uses rising-edge clocking for instruction/address/data transfer, and provides Ready/Busy polling via DO during erase/write operations.
Internal architecture includes an address decoder, mode decode logic, and output buffer driving DO in High-Z except during read or status polling. Power-on/off data protection circuitry activates below 1.5 V, and EWEN/EWDS commands enforce write protection independent of VCC state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (128 × 16-bit organization) |
| VCC Range | 2.5 V to 5.5 V - supports wide-range industrial power rails including 3.3 V and 5 V systems |
| Endurance | 1,000,000 erase/write cycles - enables frequent field updates in calibration or logging applications |
| Data Retention | Greater than 200 years at 25°C - ensures long-term reliability without refresh in unpowered storage |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - minimal GPIO usage on host MCU |
| Max Clock Frequency | 3 MHz at VCC ≥ 4.5 V - defines maximum throughput for bulk read/write operations |
| Write Cycle Time | 6 ms typical - determines minimum time between successive write commands |
Pinout & Package
93LC56CT-I/SN15KVAO is packaged in an 8-lead SOIC (SN) with Pb-free Matte Tin finish, 150-mil body width, and standard pinout compatible with industry-wide PCB footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable signal; must be held low ≥250 ns between instructions to reset internal logic |
| CLK | Serial Clock | Synchronizes all data transfers on rising edge; stoppable at any point without corruption |
| DI | Data Input | Receives Start bit, opcode, address, and write data; shares net with DO only with external current-limiting resistor |
| DO | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z on CS falling edge |
| VSS | Ground | Reference return path for all I/O and internal circuitry; must be low-impedance |
| NC | No Internal Connection | Pin 7 is unconnected internally - must be left floating or tied to VSS per layout best practice |
| VCC | Power Supply | 2.5–5.5 V supply input; internal POR circuit triggers below 1.5 V to inhibit writes |
| ORG | Organization Select | Not applicable - this is a 'B' version part; ORG pin is NC and unused |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write cycles | Eliminates need for external timing control or software delays - simplifies firmware implementation |
| Automatic ERAL before WRAL | Guarantees full-array erase prior to bulk write - prevents partial-data corruption during WRAL execution |
| Ready/Busy status on DO | Enables non-blocking polling instead of fixed-delay waits - improves system responsiveness and efficiency |
| Power-on/off data protection | Hardware-enforced write inhibition below 1.5 V - prevents inadvertent writes during brown-out or power ramp |
| 1,000,000 erase/write cycles | Supports >10 years of daily reconfiguration in industrial control nodes without wear-out risk |
Applications
| Microcontroller Configuration Storage | Industrial Sensor Calibration Data |
|---|---|
Use Scenario: Storing boot-time configuration parameters (e.g., UART baud rate, I²C address, ADC gain trim) for PIC® and dsPIC® microcontrollers. IC Role / Device Role / Timing Role: Nonvolatile memory holding persistent settings loaded at MCU startup; accessed via Microwire during initialization sequence. Use Value: Enables field-upgradable configurations without firmware reflashing; leverages 128×16-bit layout for compact 16-bit register mapping. | Use Scenario: Retaining factory-calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Write-once-during-manufacture, read-frequently storage element; accessed during sensor initialization or periodic self-test. Use Value: Ensures measurement accuracy over 200+ years without battery backup; withstands 1M cycles for recalibration in service. |
| Smart Meter Firmware Patch Storage | Medical Device Safety Parameter Backup |
Use Scenario: Holding encrypted firmware patch fragments in utility smart meters for secure over-the-air (OTA) updates. IC Role / Device Role / Timing Role: Secure auxiliary code storage; accessed only during verified OTA session with hardware write-protection enabled. Use Value: Supports robust patch rollback using WRAL/ERAL; 2.5 V min VCC allows operation during capacitor-held brown-out conditions. | Use Scenario: Backing up critical safety thresholds (e.g., temperature limits, dose timers) in Class II medical infusion pumps. IC Role / Device Role / Timing Role: Fail-safe parameter vault; read at power-on and validated against RAM copy before actuation. Use Value: Meets IEC 62304 requirements for data integrity; >200-year retention eliminates scheduled replacement cycles. |
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/SN | Identical 128×16-bit organization, same SOIC-8 package, identical electrical specs - differs only in marking format and traceability coding | No functional difference; both support same industrial temp range and Microwire protocol | Select 93LC56BT-I/SN if legacy BOM references that exact suffix; otherwise 93LC56CT-I/SN15KVAO is fully interchangeable |
| AT25020B-MAHL-T | 2 Kbit SPI interface (4-wire), 1.8–5.5 V VCC, 20 MHz max clock - lacks ORG pin but offers faster throughput and deeper sleep current | Requires SPI-capable MCU GPIO; not Microwire-compatible - necessitates driver rewrite and layout review | Choose only when migrating to SPI-based architecture; not drop-in for existing Microwire designs |
Compared with 93LC56BT-I/SN, the 93LC56CT-I/SN15KVAO offers identical functionality with updated traceability coding; versus AT25020B-MAHL-T, it retains Microwire compatibility and lower gate count interface but trades off speed for proven legacy integration.
Availability
93LC56CT-I/SN15KVAO is available at Aetrix Electronics and suitable for industrial control systems, medical device calibration storage, smart meter firmware patching, and automotive body electronics requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 93LC56CT-I/SN15KVAO 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 93LC56 series belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-power, nonvolatile memory applications in industrial, automotive, and consumer systems where Microwire interface simplicity and long-term data integrity are critical.
FAQ
What is the memory organization of the 93LC56CT-I/SN15KVAO?
The 93LC56CT-I/SN15KVAO is a 128 × 16-bit device - meaning it contains 128 addresses, each storing 16 bits of data. This is the 'B' variant within the 93LC56 family and does not use the ORG pin; the pin is marked NC (No Connection) and must be left unconnected or tied to VSS per layout guidelines. Its total capacity is 2,048 bits (2 Kbit), organized exclusively as 16-bit words.
Does the 93LC56CT-I/SN15KVAO support both 8-bit and 16-bit word access?
No, the 93LC56CT-I/SN15KVAO supports only 16-bit word access. It is a fixed 'B' version device with no ORG pin functionality. Unlike the 'C' variants (e.g., 93LC56C), which use the ORG pin to switch between 8-bit and 16-bit modes, the 93LC56CT-I/SN15KVAO is hardwired for 128 × 16-bit operation. Attempting 8-bit reads/writes will result in protocol violation and undefined behavior.
What is the purpose of the NC pin (Pin 7) on the 93LC56CT-I/SN15KVAO?
Pin 7 on the 93LC56CT-I/SN15KVAO is designated NC (No Internal Connection) - it has no bond wire or internal circuit connection. Per Microchip's datasheet guidance, this pin may be left floating or tied to VSS for mechanical stability and ESD mitigation. It must never be driven high or used as a signal node, as doing so violates the device's electrical specification and may cause unpredictable behavior.
How does the Ready/Busy status work on the 93LC56CT-I/SN15KVAO?
The Ready/Busy status is reported on the DO pin: logic low indicates an erase or write operation is still in progress; logic high means completion. To poll status, CS must first be brought low for ≥250 ns (TCSL), then raised high - DO transitions to active status within TSV (≤500 ns). After completion, issuing a Start bit followed by CS low clears the status flag. This mechanism enables efficient non-blocking firmware polling without fixed delay loops.
Is the 93LC56CT-I/SN15KVAO RoHS compliant and Pb-free?
Yes, the 93LC56CT-I/SN15KVAO is Pb-free and RoHS compliant. It uses a Matte Tin (Sn) finish per JEDEC standard, confirmed in the device's packaging documentation and marking ('SN' suffix denotes SOIC-8 with Pb-free plating). The '15KVAO' portion of the part number reflects Microchip's traceability coding for Pb-free SOIC-8 packages manufactured under RoHS-compliant processes.
93LC56CT-I/SN15KVAO 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:
- 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:
- 2 MHz
- Write Cycle Time - Word, Page:
- 6ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
93LC56CT-I/SN15KVAO FAQ
1.How can I place an order for 93LC56CT-I/SN15KVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC56CT-I/SN15KVAO 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 93LC56CT-I/SN15KVAO reliable?
The price and inventory of 93LC56CT-I/SN15KVAO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC56CT-I/SN15KVAO is usually 5 days.
3.What payment methods are accepted for 93LC56CT-I/SN15KVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC56CT-I/SN15KVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC56CT-I/SN15KVAO?
93LC56CT-I/SN15KVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC56CT-I/SN15KVAO 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 93LC56CT-I/SN15KVAO?
For technical support, including 93LC56CT-I/SN15KVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC56CT-I/SN15KVAO requirements.
6.How does Aetrix verify that 93LC56CT-I/SN15KVAO is sourced from the original manufacturer or authorized distributors?
All 93LC56CT-I/SN15KVAO 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 93LC56CT-I/SN15KVAO meets industry standards.
7.What is the process for return or replacement of 93LC56CT-I/SN15KVAO?
All 93LC56CT-I/SN15KVAO units undergo pre-shipment inspection (PSI). If there is an issue with 93LC56CT-I/SN15KVAO, 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 93LC56CT-I/SN15KVAO part is unused and in its original packaging.
Return procedure for 93LC56CT-I/SN15KVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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