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Microchip Technology 93LC56AXT-I/SN
- Part No.:
- 93LC56AXT-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC56AXT-I/SN.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,428
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Product details
Overview
93LC56AXT-I/SN from Microchip Technology Inc. is a 2 Kbit (256 × 8-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, operating from 2.5V to 5.5V, rated for industrial temperature range (–40°C to +85°C), and housed in an 8-lead SOIC package (SN). It delivers 1 million erase/write cycles, >200 years data retention, and integrated power-on/off data protection - used in embedded system configuration storage, sensor calibration memory, and firmware parameter backup.
For engineers reviewing the 93LC56AXT-I/SN datasheet, 93LC56AXT-I/SN pinout, 93LC56AXT-I/SN application, or 93LC56AXT-I/SN equivalent, key selection criteria include its fixed 8-bit organization (no ORG pin), 3-wire serial protocol compatibility, standby current ≤5 µA, write cycle time of 6 ms, and support for sequential read and automatic ERAL/WRAL operations.
Technical Context
The 93LC56AXT-I/SN implements a synchronous serial Microwire interface with CS, CLK, and DI/DO pins - no ORG pin (dedicated x8 mode). All instructions (READ, WRITE, ERASE, ERAL, WRAL, EWEN/EWDS) are initiated by a Start bit followed by opcode, address, and data bits clocked on CLK rising edges.
It features self-timed erase/write cycles with Ready/Busy status signaled via DO pin, automatic ERAL before WRAL, and power-on reset circuitry that inhibits operation below VCC = 1.5 V. The device enters Standby mode when CS is low, drawing ≤5 µA at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit) - fixed x8 organization; no ORG pin required |
| VCC range | 2.5V to 5.5V - supports wide supply rails including 3.3V and 5V systems |
| Endurance | 1,000,000 erase/write cycles - enables long-term field reconfiguration |
| Data retention | >200 years at 25°C - suitable for unattended, maintenance-free deployments |
| Write cycle time | 6 ms typical - defines minimum interval between successive write commands |
| Standby current | ≤5 µA at TA = 25°C - critical for battery-powered or energy-harvesting applications |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - minimal GPIO usage, no I²C pull-ups needed |
Pinout & Package
8-lead SOIC package (SN), 3.9 mm × 4.9 mm body, 1.27 mm pitch. Pin 1 marked by notch or dot; pin 1 is CS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; controls Standby entry/exit |
| CLK | Serial Clock | Synchronizes all data transfers on rising edge; stoppable mid-sequence without corruption |
| DI | Data Input | Accepts Start bit, opcodes, addresses, and write data; high-impedance when not selected |
| DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge |
| VSS | Ground | Reference for all logic and analog functions; requires low-impedance connection |
| NC | No Connect | Pin 7 is internally unconnected; must be left floating or tied to VSS per layout best practice |
| VCC | Power Supply | 2.5V–5.5V input; internal POR circuit disables writes below ~1.5V |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates external timing control; 6 ms max cycle ensures predictable firmware delay budgeting |
| Automatic ERAL before WRAL | Guarantees full-array readiness prior to bulk write - prevents partial-write corruption |
| Power-on/off data protection | Hardware-level VCC monitoring blocks writes during brown-out, avoiding invalid state storage |
| Sequential read mode | Enables fast dump of contiguous memory blocks with single CS assertion - reduces host CPU overhead |
| EWEN/EWDS security lock | Prevents accidental writes via explicit enable/disable commands - essential for field-upgrade safety |
Applications
| Industrial Sensor Calibration | Embedded System Configuration |
|---|---|
Use Scenario: Storing factory-trimmed ADC offset/gain coefficients and temperature compensation tables in programmable sensors. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with infrequent writes and frequent reads; accessed during sensor power-up or recalibration. Use Value: Enables plug-and-play sensor replacement without host-side calibration; leverages 200-year retention for lifetime device validity. | Use Scenario: Holding boot-time configuration flags (e.g., UART baud rate, display brightness, network MAC override) in microcontroller-based controllers. IC Role / Device Role / Timing Role: Serial configuration register bank; read at startup, written only during setup or firmware update. Use Value: Reduces need for external jumpers or solder bridges; supports field customization without hardware change. |
| Firmware Parameter Backup | Smart Meter Security Keys |
Use Scenario: Preserving user-adjusted operational parameters (e.g., setpoints, alarm thresholds) across power cycles in HVAC or lighting controllers. IC Role / Device Role / Timing Role: Low-power persistent memory; write triggered by parameter change, read at initialization. Use Value: Achieves sub-5 µA standby draw while retaining settings - extends battery life in wireless nodes. | Use Scenario: Securely storing cryptographic keys and metering constants in ANSI C12.19-compliant smart electricity meters. IC Role / Device Role / Timing Role: Tamper-resistant nonvolatile storage; accessed only by trusted firmware with EWEN authorization. Use Value: Meets ANSI/IEEE requirements for write-protection and data integrity; supports 1M-cycle field updates over 20+ year service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC56BXT-I/SN | 128 × 16-bit organization; same VCC range, package, and timing | Requires 16-bit host interface; incompatible with 8-bit software drivers | Select only if system uses native 16-bit data paths and avoids byte-level addressing complexity |
| AT25020B-MAHL-T | SPI interface (4-wire), 2 Kbit x8, 1.8–5.5V, 5 MHz max clock | Requires SPI master instead of Microwire; different command set and status reporting | Choose when migrating to SPI-based platforms or needing higher clock speed than Microwire's 3 MHz limit |
Compared with 93LC56BXT-I/SN, the 93LC56AXT-I/SN provides native 8-bit alignment for simpler firmware integration; versus AT25020B-MAHL-T, it offers lower pin count and proven Microwire compatibility but lacks SPI throughput - making it optimal for legacy or resource-constrained 3-wire designs.
Availability
93LC56AXT-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded system configuration, and firmware parameter backup requiring stable component supply across extended product lifecycles.
Supply support for 93LC56AXT-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, serving automotive, industrial, consumer, and communications markets.
The 93LCxx family was designed specifically for cost-sensitive, low-power serial EEPROM applications where Microwire compatibility, robust data retention, and industrial-grade reliability are mandatory - targeting embedded control, instrumentation, and IoT edge devices.
FAQ
What is the memory organization of the 93LC56AXT-I/SN?
The 93LC56AXT-I/SN has a fixed 256 × 8-bit (2 Kbit) organization. It belongs to the 'A' version of the 93LC56 series and does not include an ORG pin - eliminating configuration ambiguity and simplifying PCB layout and firmware design compared to 'C' variants.
Does the 93LC56AXT-I/SN support sequential read operations?
Yes, the 93LC56AXT-I/SN supports sequential read: when CS remains high after a READ instruction, the device automatically increments the internal address counter and outputs subsequent bytes on each CLK rising edge - enabling efficient block reads without repeated command overhead.
What is the maximum clock frequency supported by the 93LC56AXT-I/SN?
The 93LC56AXT-I/SN supports up to 3 MHz clock frequency when VCC is 4.5V–5.5V. At 2.5V–4.5V, the maximum is 2 MHz; at 1.8V–2.5V (not applicable here), it would be 1 MHz - confirming reliable operation across its full 2.5V–5.5V supply range.
How does the 93LC56AXT-I/SN protect against inadvertent writes during power transitions?
The 93LC56AXT-I/SN incorporates hardware power-on/power-off protection: its internal voltage detector disables all write operations when VCC falls below ~1.5V. Combined with mandatory EWEN command activation, this prevents corruption during brown-out or cold-start conditions.
Is the 93LC56AXT-I/SN pin-compatible with other 93LC56 variants in SOIC packages?
Yes - the 93LC56AXT-I/SN shares identical 8-lead SOIC (SN) pinout and footprint with 93LC56BXT-I/SN and 93LC56CXT-I/SN. However, functional compatibility requires matching organization (x8 vs x16) and command set; 'A' and 'B' versions are electrically pin-compatible but differ in data width behavior.
93LC56AXT-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:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 256 x 8
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
93LC56AXT-I/SN FAQ
1.How can I place an order for 93LC56AXT-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC56AXT-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 93LC56AXT-I/SN reliable?
The price and inventory of 93LC56AXT-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 93LC56AXT-I/SN is usually 5 days.
3.What payment methods are accepted for 93LC56AXT-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC56AXT-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC56AXT-I/SN?
93LC56AXT-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC56AXT-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 93LC56AXT-I/SN?
For technical support, including 93LC56AXT-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC56AXT-I/SN requirements.
6.How does Aetrix verify that 93LC56AXT-I/SN is sourced from the original manufacturer or authorized distributors?
All 93LC56AXT-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 93LC56AXT-I/SN meets industry standards.
7.What is the process for return or replacement of 93LC56AXT-I/SN?
All 93LC56AXT-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93LC56AXT-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 93LC56AXT-I/SN part is unused and in its original packaging.
Return procedure for 93LC56AXT-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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