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Microchip Technology 93LC56CX-E/SN
- Part No.:
- 93LC56CX-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC56CX-E/SN.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,830
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Product details
Overview
93LC56CX-E/SN from Microchip Technology Inc. is a 2 Kbit low-voltage serial EEPROM with 128 × 16-bit organization, automotive-grade temperature range (−40°C to +125°C), 2.5–5.5 V supply, and Microwire-compatible 3-wire serial interface. It features self-timed erase/write cycles, automatic ERAL before WRAL, Ready/Busy status signaling via DO pin, and 1,000,000 endurance cycles - used for configuration storage in automotive control modules.
For engineers reviewing the 93LC56CX-E/SN datasheet, 93LC56CX-E/SN pinout, 93LC56CX-E/SN application, or 93LC56CX-E/SN equivalent, key selection criteria include its automotive qualification (E-temp), ORG-pin-configurable x16 mode, 6 ms erase/write cycle time, 3 MHz max clock frequency at 4.5–5.5 V, and SOIC-8 (SN) package compatibility with legacy board layouts.
Technical Context
This device implements a synchronous Microwire-compatible serial interface with CS/CLK/DI/DO signals and an ORG pin that selects 16-bit word organization when driven high. It uses internal auto-erase-before-write logic and supports full-array ERAL and WRAL commands requiring ≥4.5 V for execution.
Power-on data protection is enforced by a built-in voltage detector (VPOR = 1.5 V typical), and write operations require explicit EWEN enable followed by EWDS disable for robustness. The DO pin serves dual function: serial data output during READ and active-low Ready/Busy indicator during programming.
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-input industrial and automotive power rails |
| Temp grade | Automotive (E): −40°C to +125°C - qualified for under-hood and ADAS applications |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI, DO) - interoperable with legacy microcontrollers |
| Write cycle time | 6 ms typical - enables deterministic firmware update timing without external polling overhead |
| Endurance | 1,000,000 erase/write cycles - suitable for frequent calibration or logging use cases |
| Data retention | >200 years at 25°C - ensures long-term reliability in unpowered storage |
| Package | 8-lead SOIC (SN) - industry-standard footprint with 1.27 mm pitch and Pb-free Matte Tin finish |
Pinout & Package
8-lead SOIC (SN) package with standard 1.27 mm pitch; exposed pad not present; RoHS-compliant Matte Tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; initiates self-timed programming on falling edge for 93LC devices |
| CLK | Serial Clock | Synchronizes all data transfers; rising-edge sampling of DI and DO; stoppable at any point without corruption |
| DI | Data Input | Accepts Start bit, opcode, address, and write data; requires no pull-up if shared with DO (with current-limiting resistor) |
| DO | Data Output / Status | Outputs read data or active-low Ready/Busy signal; enters High-Z on CS falling edge |
| VSS | Ground | Reference for all I/O and internal logic; must be connected before VCC during power-up |
| ORG | Organization select | Logic high = x16 mode (128 words); logic low = x8 mode (256 words); required for 93LC56C variants like this part |
| NC | No internal connection | Pin 7 in SOIC-8; must be left floating or tied to VSS - no functional impact |
| VCC | Power supply | 2.5–5.5 V input; internal POR circuit holds device in reset until ≥1.5 V is reached |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control - reduces MCU firmware complexity and interrupt load |
| Automatic ERAL before WRAL | Guarantees clean memory state before bulk write - prevents partial-data corruption during power loss |
| Ready/Busy status on DO | Enables efficient polling instead of fixed delays - improves system responsiveness and power efficiency |
| EWEN/EWDS write protection | Hardware-enforced write lock prevents accidental overwrites during noise events or brown-out conditions |
| Pb-free & RoHS compliant | Meets global environmental regulations and simplifies end-product compliance documentation |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Storing trim values, sensor calibration coefficients, and fault logs in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Nonvolatile configuration memory interfaced directly to 8/16-bit MCUs via Microwire bus. Use Value: Automotive temperature rating and 1M-cycle endurance ensure reliable operation across 15+ year vehicle lifetimes. | Use Scenario: Retaining camera alignment offsets, radar beamforming parameters, and safety-critical boot configuration in lane-keeping or AEB modules. IC Role / Device Role / Timing Role: Secure, low-power serial EEPROM accessed during startup and runtime reconfiguration. Use Value: 6 ms write time and Ready/Busy signaling allow deterministic parameter updates without blocking main CPU execution. |
| Body Control Module (BCM) | Infotainment System Settings |
Use Scenario: Holding user preferences (window positions, mirror angles, lighting profiles) and module-specific diagnostics history. IC Role / Device Role / Timing Role: Secondary nonvolatile memory supporting CAN/LIN-connected microcontrollers with minimal pin count. Use Value: SOIC-8 package enables drop-in replacement in space-constrained PCBs; 2.5 V min VCC supports low-power sleep modes. | Use Scenario: Preserving audio equalizer settings, display brightness levels, and Bluetooth pairing IDs across power cycles. IC Role / Device Role / Timing Role: Configuration store accessed asynchronously by application processor during boot or UI interaction. Use Value: >200-year data retention eliminates need for battery-backed SRAM, reducing BOM cost and failure points. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC56BT-E/SN | Dedicated x16 organization (no ORG pin); same VCC/temp/package; lacks ORG flexibility | Fixed 128×16-bit layout only - simpler routing but no field-reconfigurable word size | Choose when hardware design fixes word size and eliminates ORG trace routing |
| AT25DF021-SSH-T | SPI interface (4-wire), 2 Mbit density, sector erase, faster 20 MHz clock - not Microwire-compatible | Requires SPI-capable host; suited for larger firmware storage, not direct pin-for-pin replacement | Consider only for new designs needing higher density or faster throughput; not a functional substitute |
Compared with 93LC56BT-E/SN, the 93LC56CX-E/SN offers field-selectable x8/x16 operation via ORG, enabling one BOM for multiple configurations; versus AT25DF021-SSH-T, it retains Microwire compatibility and lower power consumption but trades off speed and density.
Availability
93LC56CX-E/SN is available at Aetrix Electronics and suitable for automotive control units, ADAS subsystems, and body electronics requiring stable component supply with guaranteed E-temp qualification and long-term lifecycle support.
Supply support for 93LC56CX-E/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 microcontroller, analog, FPGA, 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, and automotive-qualified nonvolatile storage where Microwire interface compatibility and proven reliability are essential.
FAQ
What is the function of the ORG pin on the 93LC56CX-E/SN?
The ORG pin on the 93LC56CX-E/SN selects memory organization: logic high configures 128 × 16-bit mode, logic low configures 256 × 8-bit mode. This pin is mandatory for the 'C' variant and must be tied to a valid logic level (VCC or VSS); floating is not allowed. Unlike A/B versions, the 93LC56CX-E/SN requires external logic to set word size, enabling flexible system-level configuration without changing firmware.
Does the 93LC56CX-E/SN support both 2.5 V and 5.5 V operation?
Yes, the 93LC56CX-E/SN operates across a VCC range of 2.5 V to 5.5 V. At 2.5 V, maximum clock frequency is 2 MHz and write current is limited to 2 µA standby; at 5.5 V, clock can reach 3 MHz and write cycle time remains 6 ms. The internal voltage detector (VPOR = 1.5 V typical) ensures data integrity during power ramp-up and brown-out conditions across this full range.
How does the Ready/Busy status work on the 93LC56CX-E/SN?
The DO pin of the 93LC56CX-E/SN provides Ready/Busy status during erase/write operations: logic low indicates ongoing programming, logic high means completion. To read status, CS must be brought high for ≥250 ns after TCSL, then sampled on subsequent CLK edges. After completion, issuing a Start bit followed by CS low clears the status flag. This eliminates need for fixed delay loops and improves real-time system efficiency.
Is the 93LC56CX-E/SN pin-compatible with older 93LC56A or 93LC56B variants?
No - the 93LC56CX-E/SN is not pin-compatible with 93LC56A or 93LC56B. While all share the same SOIC-8 (SN) package, the 93LC56A/B lack the ORG pin (replaced by NC), whereas the 93LC56CX-E/SN uses Pin 6 for ORG. In SOIC-8, Pin 6 is NC on A/B versions but functional ORG on C versions, making direct PCB substitution impossible without layout revision.
What packaging and marking identify the 93LC56CX-E/SN?
The 93LC56CX-E/SN uses an 8-lead SOIC package with SN suffix, Pb-free Matte Tin finish, and automotive temperature grade (E). Marking includes "L56C" on first line, "3L56CT" on second line, "E" for temperature grade, year-week code (e.g., "528"), and alphanumeric traceability (e.g., "E34"). The "X" in the part number denotes the C-version with ORG pin, distinguishing it from A/B variants.
93LC56CX-E/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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:
- 6ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
93LC56CX-E/SN FAQ
1.How can I place an order for 93LC56CX-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC56CX-E/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 93LC56CX-E/SN reliable?
The price and inventory of 93LC56CX-E/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC56CX-E/SN is usually 5 days.
3.What payment methods are accepted for 93LC56CX-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC56CX-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC56CX-E/SN?
93LC56CX-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC56CX-E/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 93LC56CX-E/SN?
For technical support, including 93LC56CX-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC56CX-E/SN requirements.
6.How does Aetrix verify that 93LC56CX-E/SN is sourced from the original manufacturer or authorized distributors?
All 93LC56CX-E/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 93LC56CX-E/SN meets industry standards.
7.What is the process for return or replacement of 93LC56CX-E/SN?
All 93LC56CX-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93LC56CX-E/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 93LC56CX-E/SN part is unused and in its original packaging.
Return procedure for 93LC56CX-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93LC56CX-E/SN Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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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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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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