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Microchip Technology 93LC56BXT/SN
- Part No.:
- 93LC56BXT/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC56BXT/SN.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,673
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Product details
Overview
93LC56BXT/SN from Microchip Technology Inc. is a 2 Kbit, 128 × 16-bit organization serial EEPROM with Microwire-compatible 3-wire interface, operating over 2.5–5.5 V supply and supporting Industrial (−40°C to +85°C) and Automotive (−40°C to +125°C) temperature ranges. It features self-timed erase/write cycles, automatic ERAL before WRAL, Ready/Busy status signaling, and 1,000,000 endurance cycles - deployed in automotive body control modules for calibration storage.
For engineers reviewing the 93LC56BXT/SN datasheet, 93LC56BXT/SN pinout, 93LC56BXT/SN application, or 93LC56BXT/SN equivalent, key selection criteria include 16-bit word width, SOIC-8 (SN) package compatibility, VCC range tolerance, ERAL/WRAL timing constraints, and industrial-automotive dual-temp qualification.
Technical Context
The 93LC56BXT/SN implements a synchronous 3-wire Microwire interface with CS, CLK, and DI/DO pins; it lacks an ORG pin (fixed 16-bit x128 organization), distinguishing it from 'C' variants. Its internal logic requires EWEN instruction prior to any erase/write operation and supports sequential read mode when CS remains high.
Power-on data protection is enforced via internal voltage detection (VPOR = 1.5 V typical), and all programming modes are inhibited below this threshold. The device uses CMOS technology enabling ultra-low standby current (1 µA at I-temp, 5 µA at E-temp) and supports clock frequencies up to 3 MHz at VCC ≥ 4.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (128 words × 16 bits) - fixed x16 organization; no ORG pin required. |
| VCC Range | 2.5 V to 5.5 V - supports wide-input industrial and automotive power rails. |
| Endurance | 1,000,000 erase/write cycles - enables long-term field recalibration without wear-out risk. |
| Data Retention | 200 years at 25°C - ensures firmware or calibration data integrity across product lifecycle. |
| Write Cycle Time | 6 ms per byte/word - self-timed; no external delay needed; includes auto-erase. |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - minimal GPIO usage on host MCU. |
| Temp Range | Industrial: −40°C to +85°C; Automotive: −40°C to +125°C - qualified for under-hood and chassis applications. |
Pinout & Package
93LC56BXT/SN is packaged in 8-lead SOIC (SN), with Pb-free Matte Tin finish. Pin 1 is CS, Pin 2 is CLK, Pin 3 is DI, Pin 4 is DO, Pin 5 is VSS, Pin 6 is NC (no internal connection), Pin 7 is NC, Pin 8 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; initiates self-timed write on falling edge. |
| CLK (Pin 2) | Serial Clock | Synchronizes opcode/address/data transfer on rising edge; stoppable mid-sequence without corruption. |
| DI (Pin 3) | Data Input | Accepts Start bit, opcodes (e.g., 01 for WRITE), 7-bit address, and 16-bit data for x16 mode. |
| DO (Pin 4) | Data Output / Status | Outputs 16-bit read data or Ready/Busy signal (low = busy); enters High-Z on CS fall. |
| VSS (Pin 5) | Ground | Reference for all digital and analog circuitry; must be low-impedance return path. |
| NC (Pin 6, Pin 7) | No Internal Connection | Unbonded; must be left floating or tied to VSS per layout best practice - no functional role. |
| VCC (Pin 8) | Power Supply | Supplies core logic and memory array; VPOR threshold (1.5 V) enforces power-on data protection. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed Erase/Write | Eliminates need for external timing control or software delays - reduces MCU overhead and firmware complexity. |
| Automatic ERAL before WRAL | Guarantees full-array erase prior to bulk write, preventing partial-data corruption during firmware updates. |
| Ready/Busy Status on DO | Enables polling-based synchronization without dedicated interrupt lines - simplifies host driver design. |
| EWEN/EWDS Security Protocol | Prevents accidental writes by requiring explicit enable command before each programming sequence. |
| 100% Tested Data Protection | Voltage-detect circuitry blocks all operations below 1.5 V - ensures data integrity during brown-out or power ramp-up. |
Applications
| Automotive Body Control Unit (BCU) | Industrial PLC Configuration Storage |
|---|---|
Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in vehicle door modules. IC Role / Device Role / Timing Role: Nonvolatile configuration memory interfaced to 8-bit microcontroller via Microwire; accessed during power-up and user adjustment. Use Value: 128×16-bit capacity accommodates 16+ parameter sets; 1M endurance supports lifetime recalibration; −40°C to +125°C rating ensures reliability under hood. | Use Scenario: Holding I/O mapping tables, PID tuning constants, and alarm thresholds in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Serial EEPROM providing persistent storage for field-configurable parameters; accessed during boot and runtime via SPI-like Microwire. Use Value: 2.5–5.5 V operation matches 3.3 V/5 V PLC power domains; SOIC-8 footprint enables drop-in replacement; 200-year retention avoids periodic backup. |
| Medical Infusion Pump Calibration | Smart Energy Meter Firmware Patch Storage |
Use Scenario: Retaining flow-rate calibration coefficients and safety limits updated during service calibration. IC Role / Device Role / Timing Role: Tamper-resistant nonvolatile memory storing critical safety-critical parameters; accessed only during authorized service mode. Use Value: EWEN/EWDS protocol prevents unauthorized writes; 1.5 V VPOR blocks operation during low-voltage faults; AEC-Q100-aligned temp range meets IEC 62304. | Use Scenario: Storing delta patches applied to meter firmware during OTA updates to minimize bandwidth usage. IC Role / Device Role / Timing Role: Low-power serial memory holding compressed patch binaries; accessed infrequently but requiring guaranteed write success. Use Value: 6 ms write time enables fast patch commit; 1 µA standby current extends battery life in backup-powered meters; SOIC-8 allows automated assembly. |
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 | Same 128×16-bit organization, SOIC-8 package, and 2.5–5.5 V range; differs only in temperature grade (I-temp only, not E-temp). | Lacks automotive qualification; unsuitable for under-hood or chassis-mounted designs requiring −40°C to +125°C operation. | Select 93LC56BXT/SN when AEC-Q100-compliant operation across full automotive temperature range is mandatory. |
| AT25128B-SSHL-T | 128 Kbit SPI EEPROM (8×16 Kbit), 1.8–5.5 V, SOIC-8; uses SPI protocol instead of Microwire; no EWEN/EWDS security commands. | Higher density but incompatible instruction set and timing; requires MCU firmware rewrite and layout review for CS/CLK/DI/DO routing. | Choose only if system already uses SPI peripherals and additional memory capacity justifies requalification effort. |
Compared with 93LC56BT-I/SN, 93LC56BXT/SN adds automotive temperature support without changing pinout or firmware; versus AT25128B-SSHL-T, it retains Microwire compatibility and hardware write protection but offers lower density - ideal for cost- and footprint-sensitive legacy designs.
Availability
93LC56BXT/SN is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and medical device manufacturing requiring stable component supply and long-term lifecycle assurance.
Supply support for 93LC56BXT/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 devices, and memory solutions, headquartered in Chandler, Arizona.
The 93LC56x series belongs to Microchip's legacy Microwire-compatible EEPROM product line, designed specifically for space-constrained, low-power embedded systems requiring robust nonvolatile storage with simple 3-wire control.
FAQ
What is the memory organization of the 93LC56BXT/SN?
The 93LC56BXT/SN has a fixed 128 × 16-bit (2 Kbit) organization. Unlike 'C' variants, it does not feature an ORG pin - its x16 configuration is hardwired. This eliminates external logic for word-size selection and simplifies PCB layout compared to configurable versions. The 93LC56BXT/SN delivers deterministic 16-bit data access per READ/WRITE cycle.
Does the 93LC56BXT/SN require an external pull-up resistor on the DO pin?
No, the 93LC56BXT/SN 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 state when CS is low or during non-read operations. However, a 10 kΩ pull-down on CS is recommended per Microchip's application guidance to prevent spurious activation during power-up.
How does the 93LC56BXT/SN handle power loss during a write operation?
The 93LC56BXT/SN incorporates built-in power-loss protection: its internal voltage detector (VPOR = 1.5 V typical) halts all erase/write operations if VCC drops below this threshold. This ensures that partially written data is never committed, preserving memory integrity. No external capacitors or brown-out reset circuits are required for basic write safety - the 93LC56BXT/SN manages this autonomously.
Can the 93LC56BXT/SN be used in place of the 93LC56A variant?
No, the 93LC56BXT/SN is not a direct replacement for 93LC56A variants. The 93LC56A uses 256 × 8-bit organization and outputs 8-bit data per READ cycle, while the 93LC56BXT/SN outputs 16-bit data. Firmware, address decoding, and data-handling logic must be revised to accommodate the doubled word width and halved address depth - they are functionally incompatible without system-level changes.
What is the maximum clock frequency supported by the 93LC56BXT/SN at 3.3 V operation?
At VCC = 3.3 V (within 2.5–5.5 V range), the 93LC56BXT/SN supports a maximum clock frequency of 2 MHz. This is specified in Table 1-2 (A1) for 2.5 V ≤ VCC < 4.5 V. Exceeding this limit risks setup/hold timing violations, particularly TDIS and TDIH, which scale inversely with supply voltage - maintaining 2 MHz ensures reliable communication across full temperature and voltage ranges.
93LC56BXT/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:
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
93LC56BXT/SN FAQ
1.How can I place an order for 93LC56BXT/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC56BXT/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 93LC56BXT/SN reliable?
The price and inventory of 93LC56BXT/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC56BXT/SN is usually 5 days.
3.What payment methods are accepted for 93LC56BXT/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC56BXT/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC56BXT/SN?
93LC56BXT/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC56BXT/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 93LC56BXT/SN?
For technical support, including 93LC56BXT/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC56BXT/SN requirements.
6.How does Aetrix verify that 93LC56BXT/SN is sourced from the original manufacturer or authorized distributors?
All 93LC56BXT/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 93LC56BXT/SN meets industry standards.
7.What is the process for return or replacement of 93LC56BXT/SN?
All 93LC56BXT/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93LC56BXT/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 93LC56BXT/SN part is unused and in its original packaging.
Return procedure for 93LC56BXT/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93LC56BXT/SN Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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AT24C08C-STUM-T
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