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Microchip Technology 93LC56CXT-E/SN
- Part No.:
- 93LC56CXT-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC56CXT-E/SN.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,480
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Product details
Overview
93LC56CXT-E/SN from Microchip Technology Inc. is a 2 Kbit low-voltage serial EEPROM with configurable 8-/16-bit word organization via the ORG pin, 2.5–5.5 V supply range, -40°C to +125°C automotive temperature grade, and Microwire-compatible 3-wire serial interface. It delivers 1 million erase/write cycles and >200 years data retention for nonvolatile storage in engine control units and sensor calibration modules.
For engineers reviewing the 93LC56CXT-E/SN datasheet, 93LC56CXT-E/SN pinout, 93LC56CXT-E/SN application, or 93LC56CXT-E/SN equivalent, key selection criteria include ORG-pin-configurable memory width, automotive-grade reliability, self-timed erase/write with ERAL/WRAL support, Ready/Busy status signaling, and Pb-free SOIC-8 (SN) packaging.
Technical Context
The 93LC56CXT-E/SN implements a synchronous Microwire-compatible serial interface with CS, CLK, DI, and DO pins, where instruction execution begins on detection of a Start condition (CS high and DI high on CLK rising edge). Its dual-word-size architecture relies on external logic driving the ORG pin: VCC selects 128 × 16-bit mode, VSS selects 256 × 8-bit mode.
Internal operation includes automatic erase-before-write, dedicated EWEN/EWDS commands for write protection, and Ready/Busy polling via DO during self-timed programming cycles (TWC = 6 ms max). Power-on reset circuitry inhibits all operations below VCC = 1.5 V, and VCC ≥ 4.5 V is required for ERAL and WRAL functions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit or 128 × 16-bit, selectable via ORG pin) |
| VCC range | 2.5 V to 5.5 V - supports wide-input industrial and automotive power rails |
| Temperature grade | Automotive (E): -40°C to +125°C - qualified for under-hood and safety-critical systems |
| Endurance | 1,000,000 erase/write cycles - enables frequent field updates in telemetry and calibration applications |
| Data retention | >200 years at 25°C - ensures long-term firmware parameter integrity without refresh |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - minimal GPIO usage, compatible with legacy microcontrollers |
| Write cycle time | 6 ms max (TWC) - deterministic timing for real-time system scheduling |
| Package | 8-lead SOIC (SN) - standard surface-mount footprint with 150-mil width, RoHS-compliant matte tin finish |
Pinout & Package
8-lead SOIC (SN) package with 150-mil body width, Pb-free matte tin finish, and standard JEDEC outline. Pin 1 marked by laser dot or notch.
| 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 clocks in opcode/address/data; stoppable mid-sequence without state loss |
| DI | Data Input | Receives Start bit, opcodes, addresses, and write data; shares bidirectional bus with DO when externally wired |
| DO | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z on CS falling edge |
| VSS | Ground | Reference for all digital and analog circuitry; must be low-impedance connection |
| ORG | Organization Control | Logic high → 128 × 16-bit mode; logic low → 256 × 8-bit mode; must be externally biased, not floating |
| NC | No Internal Connection | Pin 7 is unconnected internally; may be left open or tied to ground per layout best practice |
| VCC | Power Supply | 2.5–5.5 V input; internal POR activates below 1.5 V; ≥4.5 V required for ERAL/WRAL operations |
Key Features
| Feature | Design Value |
|---|---|
| ORG-pin-selectable word size | Enables single BOM to support both 8-bit and 16-bit host MCU interfaces without redesign |
| Self-timed erase/write with auto-erase | Eliminates need for external timing control; simplifies firmware and reduces CPU overhead |
| ERAL and WRAL commands | Full-array erase (6 ms) and full-array write (15 ms) with integrated auto-erase - accelerates factory programming and field recovery |
| Ready/Busy status on DO | Enables non-blocking polling during programming - preserves real-time responsiveness in embedded systems |
| Power-on/off data protection | Hardware lockout below 1.5 V VCC prevents corruption during brown-out or hot-swap events |
| EWEN/EWDS write protection | Dedicated enable/disable commands prevent accidental writes - critical for safety-critical configuration storage |
Applications
| Engine Control Unit (ECU) Calibration Storage | Automotive Sensor Linearization Tables |
|---|---|
Use Scenario: Storing trim values, fuel maps, and emission calibration parameters that require field updates over vehicle lifetime. IC Role / Device Role / Timing Role: Nonvolatile configuration memory interfaced to 8-bit or 16-bit MCU via Microwire; ORG pin set per host bus width. Use Value: 1M endurance and >200-year retention ensure calibration integrity across 15+ year vehicle service life without backup battery. | Use Scenario: Holding temperature-compensated lookup tables for pressure, oxygen, and throttle position sensors. IC Role / Device Role / Timing Role: Serial EEPROM providing read-on-power-up data to ADC/DAC peripherals; accessed during boot sequence. Use Value: Automotive-grade (-40°C to +125°C) operation guarantees reliable table retrieval in extreme under-hood environments. |
| Industrial PLC Configuration Backup | Medical Device Safety Parameter Storage |
Use Scenario: Preserving I/O mapping, PID tuning constants, and alarm thresholds during AC power loss. IC Role / Device Role / Timing Role: Low-power serial memory holding critical runtime parameters; accessed via 3-wire interface with minimal GPIO use. Use Value: 2.5 V minimum VCC allows direct connection to 3.3 V logic rails; standby current ≤5 µA extends battery backup duration. | Use Scenario: Securing FDA-required device settings (e.g., dose limits, alarm thresholds) that must survive power cycling and sterilization cycles. IC Role / Device Role / Timing Role: Tamper-resistant nonvolatile memory with hardware write protection (EWEN/EWDS) and POR lockout. Use Value: Built-in power-on data protection and explicit write-enable protocol prevent unauthorized or corrupted parameter changes. |
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 128 × 16-bit organization; no ORG pin - fixed 16-bit interface | Requires 16-bit host MCU; eliminates ORG routing but lacks flexibility for mixed-bus designs | Select when host interface is strictly 16-bit and board space permits fixed-configuration solution |
| AT25020B-MAHL-T | SPI interface (4-wire), 2 Kbit, 1.8–5.5 V, -40°C to +125°C, 1M endurance | Uses SPI instead of Microwire; requires additional CS line and different command set | Choose for SPI-native systems; verify firmware compatibility with AT25020B's status register and write-enable latch |
Compared with 93LC56BT-E/SN, the 93LC56CXT-E/SN offers bus-width flexibility via ORG; compared with AT25020B-MAHL-T, it retains Microwire compatibility for legacy MCU designs but lacks SPI daisy-chain capability.
Availability
93LC56CXT-E/SN is available at Aetrix Electronics and suitable for automotive ECU calibration, industrial PLC configuration backup, and medical device safety parameter storage requiring stable component supply across extended product lifecycles.
Supply support for 93LC56CXT-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 93LC56CXT-E/SN belongs to Microchip's legacy 93XX serial EEPROM family, designed specifically for cost-sensitive, low-power, nonvolatile memory applications in automotive, industrial, and consumer systems requiring Microwire compatibility and extended temperature operation.
FAQ
What is the function of the ORG pin on the 93LC56CXT-E/SN?
The ORG pin on the 93LC56CXT-E/SN configures memory organization: tied to VCC it selects 128 × 16-bit mode, tied to VSS it selects 256 × 8-bit mode. This allows one 93LC56CXT-E/SN part to serve both 8-bit and 16-bit host microcontrollers without hardware change. The pin must be externally biased - floating is not permitted - and its state is sampled at instruction start.
Does the 93LC56CXT-E/SN support automatic erase before write?
Yes, the 93LC56CXT-E/SN performs automatic erase before each write operation, eliminating the need for separate erase commands for individual addresses. This self-timed auto-erase is integral to the WRITE and WRAL instructions. Full-array erase is also supported via the ERAL command, which requires VCC ≥ 4.5 V to execute.
What is the maximum clock frequency supported by the 93LC56CXT-E/SN at 3.3 V?
At VCC = 3.3 V (within the 2.5–5.5 V range), the 93LC56CXT-E/SN supports a maximum clock frequency of 2 MHz, as specified in Table 1-2 (A1, FCLK) for 2.5 V ≤ VCC < 5.5 V. Timing margins must also satisfy TCKH ≥ 250 ns and TCKL ≥ 200 ns under these conditions.
How does the Ready/Busy status work on the 93LC56CXT-E/SN DO pin?
The DO pin of the 93LC56CXT-E/SN outputs Ready/Busy status during erase or write cycles: logic low indicates ongoing programming, logic high indicates completion. To read status, CS must be brought high for ≥250 ns after the initial low pulse (TCSL), and DO must be sampled after TSV delay. Status is cleared by issuing a Start bit followed by CS low.
Is the 93LC56CXT-E/SN pin-compatible with other 93XX56 variants in SOIC-8 (SN) package?
Yes, the 93LC56CXT-E/SN uses the same 8-lead SOIC (SN) footprint and pinout as all 93XX56A/B/C variants in that package, including identical CS, CLK, DI, DO, VSS, ORG/NC, NC, and VCC assignments. However, functional compatibility depends on ORG pin usage: 'A' and 'B' variants lack ORG and have fixed organization, while 'C' variants require ORG biasing.
93LC56CXT-E/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, 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
93LC56CXT-E/SN FAQ
1.How can I place an order for 93LC56CXT-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC56CXT-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 93LC56CXT-E/SN reliable?
The price and inventory of 93LC56CXT-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 93LC56CXT-E/SN is usually 5 days.
3.What payment methods are accepted for 93LC56CXT-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC56CXT-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC56CXT-E/SN?
93LC56CXT-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC56CXT-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 93LC56CXT-E/SN?
For technical support, including 93LC56CXT-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC56CXT-E/SN requirements.
6.How does Aetrix verify that 93LC56CXT-E/SN is sourced from the original manufacturer or authorized distributors?
All 93LC56CXT-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 93LC56CXT-E/SN meets industry standards.
7.What is the process for return or replacement of 93LC56CXT-E/SN?
All 93LC56CXT-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93LC56CXT-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 93LC56CXT-E/SN part is unused and in its original packaging.
Return procedure for 93LC56CXT-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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