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Microchip Technology 93LC56CT-E/MNY
- Part No.:
- 93LC56CT-E/MNY
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
93LC56CT-E/MNY.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,288
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Product details
Overview
93LC56CT-E/MNY from Microchip Technology Inc. is a 2 Kbit low-voltage serial EEPROM with 128 × 16-bit organization, supporting Microwire-compatible 3-wire serial interface (CS/CLK/DI/DO), ORG pin for configuration, and automotive-grade operation from −40°C to +125°C. It delivers 1 million erase/write cycles, >200 years data retention, and self-timed erase/write with automatic ERAL before WRAL - used in engine control units for calibration storage.
For engineers reviewing the 93LC56CT-E/MNY datasheet, 93LC56CT-E/MNY pinout, 93LC56CT-E/MNY application, or 93LC56CT-E/MNY equivalent, key selection criteria include VCC range (2.5–5.5 V), 16-bit word mode via ORG = VCC, automotive temperature rating, TSSOP-8 package, and Ready/Busy status via DO pin during programming.
Technical Context
The 93LC56CT-E/MNY implements a synchronous Microwire-compatible serial interface with start-bit detection, opcode-driven command set (READ/WRITE/ERASE/ERAL/WRAL/EWEN/EWDS), and dual-mode memory organization selected by the ORG pin. It uses internal auto-erase prior to write and supports sequential read with dummy-zero preamble.
Its functional architecture includes an address counter, mode decode logic, clock register, output buffer, and power-on reset circuitry that inhibits all operations below VCC = 1.5 V. The DO pin serves dual roles: serial data output during READ and Ready/Busy status indicator during erase/write cycles when CS is reasserted after TCSL ≥ 250 ns.
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 |
| Temperature Range | −40°C to +125°C (Automotive E grade) - qualified for under-hood applications |
| Endurance | 1,000,000 erase/write cycles - enables frequent firmware or calibration updates |
| Data Retention | 200+ years at 25°C - ensures long-term reliability in unpowered storage |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - minimal GPIO usage on host MCU |
| Write Cycle Time | 6 ms typical (TWC) - deterministic timing for system-level timeout handling |
| Standby Current | 1 µA max (ICCS) - ultra-low quiescent power for battery-backed systems |
Pinout & Package
93LC56CT-E/MNY is housed in an 8-lead TSSOP (Thin Shrink Small Outline Package) with 0.65 mm pitch, Pb-free Matte Tin finish, and exposed pad option (not connected per datasheet). Pin 1 is marked by laser dot; orientation follows standard JEDEC TSSOP layout.
| 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 |
| CLK | Serial Clock | Synchronizes all data transfers on rising edge; stoppable at any level; no clocks required during auto-erase/write |
| DI | Data Input | Accepts start bit, opcodes, addresses, and write data; tied to DO only with series resistor to avoid bus conflict |
| DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge |
| VSS | Ground | Reference for all I/O and internal logic; connects to exposed pad if used |
| ORG | Organization Select | Logic high → 16-bit mode; logic low → 8-bit mode; must be externally biased; NC on A/B variants |
| NC | No Connect | Internally unconnected; left floating or grounded per layout best practice |
| VCC | Power Supply | 2.5–5.5 V input; POR circuit disables operations below 1.5 V; ≥4.5 V required for ERAL/WRAL |
Key Features
| Feature | Design Value |
|---|---|
| ORG-pin configurable x8/x16 organization | Enables flexible data bus alignment without hardware redesign - select 16-bit mode by tying ORG to VCC |
| Self-timed erase/write with auto-erase | Eliminates external timing control; host only waits for DO = high or polls status - simplifies firmware |
| Automatic ERAL before WRAL | Guarantees full-array erase prior to bulk write - prevents stale data corruption in calibration tables |
| Power-on/off data protection | Hardware lockout below VCC = 1.5 V prevents spurious writes during brown-out or startup - no software safeguards needed |
| Ready/Busy status on DO pin | Enables real-time polling instead of fixed delays - reduces worst-case latency and improves system responsiveness |
| 1,000,000 endurance cycles | Supports daily recalibration logging over 10+ years - validated at 25°C, 5.0 V |
Applications
| Engine Control Unit (ECU) Calibration Storage | Industrial PLC Configuration Memory |
|---|---|
Use Scenario: Storing fuel map coefficients, sensor offsets, and adaptive learning values subject to field updates via diagnostic port. IC Role / Device Role / Timing Role: Nonvolatile parameter store interfaced to MCU via Microwire; accessed during boot and runtime reconfiguration. Use Value: 128 × 16-bit organization aligns with 16-bit MCU data paths; automotive temp rating ensures reliability near engine bay heat sources. | Use Scenario: Holding I/O mapping, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in factory environments. IC Role / Device Role / Timing Role: Serial configuration EEPROM accessed during PLC initialization and maintenance mode. Use Value: 1 µA standby current extends backup battery life; 6 ms write time enables deterministic update sequences in cyclic scan logic. |
| Medical Infusion Pump Settings | Automotive Body Control Module (BCM) |
Use Scenario: Persisting drug library, dose limits, and user preferences across power cycles in Class II medical devices. IC Role / Device Role / Timing Role: Safety-critical nonvolatile memory storing FDA-mandated configuration data; accessed via isolated SPI-to-Microwire bridge. Use Value: >200-year data retention meets regulatory archival requirements; ERAL/WRAL support enables secure factory reset without external erasure tools. | Use Scenario: Saving window position memory, mirror presets, and lighting profiles in vehicle body modules. IC Role / Device Role / Timing Role: Low-power serial EEPROM interfaced directly to 8-bit or 16-bit automotive microcontroller. Use Value: TSSOP-8 package fits tight PCB spaces; −40°C to +125°C rating matches BCM under-dash thermal profile. |
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/MNY | Dedicated 16-bit organization (no ORG pin); same VCC/temp/package | Fixed 16-bit interface - eliminates need for ORG biasing but removes flexibility | Select when system always uses 16-bit words and board space allows removal of ORG pull-up/down resistor |
| AT25128B-MAHL-T | SPI interface (4-wire), 128 Kbit capacity, 1.8–5.5 V, SOIC-8 | Higher density, faster clock (20 MHz), but requires additional CS and MOSI/MISO lines | Choose for bandwidth-sensitive applications needing >2 Kbit or SPI-native hosts; not drop-in compatible |
Compared with 93LC56BT-E/MNY, the 93LC56CT-E/MNY offers configurable word size via ORG-critical for mixed-bus systems-while AT25128B-MAHL-T provides greater density and speed at the cost of interface compatibility and pin count.
Availability
93LC56CT-E/MNY is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and medical device design requiring stable component supply, long-lifecycle assurance, and AEC-Q200-aligned qualification.
Supply support for 93LC56CT-E/MNY 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 93LCxx family was designed specifically for cost-sensitive, low-power serial EEPROM applications in automotive, industrial, and consumer systems where Microwire compatibility, small footprint, and robust data integrity are essential.
FAQ
What is the function of the ORG pin on the 93LC56CT-E/MNY?
The ORG pin on the 93LC56CT-E/MNY selects memory organization: logic high (VCC) configures 128 × 16-bit mode, logic low (VSS) configures 256 × 8-bit mode. Unlike 93LC56BT-E/MNY, the 'C' variant requires external biasing of ORG - it is not internally fixed. This pin is absent on 'A' and 'B' versions.
Does the 93LC56CT-E/MNY support sequential read operation?
Yes, the 93LC56CT-E/MNY supports sequential read: when CS remains high after a READ instruction, the internal address counter automatically increments, and subsequent data bits stream out on DO. Each 16-bit word is preceded by a dummy zero, and data toggles on the rising edge of CLK with TPD ≤ 400 ns.
What voltage is required for ERAL and WRAL commands on the 93LC56CT-E/MNY?
The 93LC56CT-E/MNY requires VCC ≥ 4.5 V to execute ERAL (Erase All) and WRAL (Write All) commands reliably. Below this threshold, these instructions will not initiate - a hardware-level safeguard preventing incomplete or corrupted bulk operations during brown-out conditions.
How does the Ready/Busy status work on the 93LC56CT-E/MNY DO pin?
During erase or write cycles, the DO pin of the 93LC56CT-E/MNY outputs Ready/Busy status: logic low indicates ongoing programming, logic high signals completion. To read status, CS must be brought high for ≥250 ns after TCSL, then sampled - DO returns to High-Z on CS falling edge.
Is the 93LC56CT-E/MNY pin-compatible with other 93LC56x variants in TSSOP-8?
Yes, the 93LC56CT-E/MNY shares identical TSSOP-8 pinout and footprint with 93LC56AT-E/MNY and 93LC56BT-E/MNY per Microchip DS21794G-page 12. However, ORG functionality differs: 'C' uses it for configuration, while 'A'/'B' have it as NC - direct replacement requires verifying ORG handling in firmware and schematic.
93LC56CT-E/MNY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- 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-TDFN (2x3)
93LC56CT-E/MNY FAQ
1.How can I place an order for 93LC56CT-E/MNY through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC56CT-E/MNY 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-E/MNY reliable?
The price and inventory of 93LC56CT-E/MNY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC56CT-E/MNY is usually 5 days.
3.What payment methods are accepted for 93LC56CT-E/MNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC56CT-E/MNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC56CT-E/MNY?
93LC56CT-E/MNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC56CT-E/MNY 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-E/MNY?
For technical support, including 93LC56CT-E/MNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC56CT-E/MNY requirements.
6.How does Aetrix verify that 93LC56CT-E/MNY is sourced from the original manufacturer or authorized distributors?
All 93LC56CT-E/MNY 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-E/MNY meets industry standards.
7.What is the process for return or replacement of 93LC56CT-E/MNY?
All 93LC56CT-E/MNY units undergo pre-shipment inspection (PSI). If there is an issue with 93LC56CT-E/MNY, 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-E/MNY part is unused and in its original packaging.
Return procedure for 93LC56CT-E/MNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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