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Microchip Technology 93LC56BT-E/MNY
- Part No.:
- 93LC56BT-E/MNY
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
93LC56BT-E/MNY.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,880
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Product details
Overview
93LC56BT-E/MNY from Microchip Technology is a 2 Kbit (256 × 8-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 2.5–5.5 V supply range, -40°C to +125°C automotive temperature grade, and 1 million erase/write cycles. It serves as nonvolatile configuration storage in automotive body control modules, industrial sensor nodes, and embedded system boot parameter retention.
For engineers reviewing the 93LC56BT-E/MNY datasheet, 93LC56BT-E/MNY pinout, 93LC56BT-E/MNY application, or 93LC56BT-E/MNY equivalent, key selection criteria include its automotive-grade reliability, ORG pin absence (fixed 8-bit organization), self-timed write/erase, Ready/Busy status signaling via DO, and compatibility with legacy Microwire controllers requiring minimal firmware changes.
Technical Context
The 93LC56BT-E/MNY implements a synchronous serial interface using CS, CLK, and DI/DO pins - no ORG pin present, confirming fixed 8-bit x256 organization. Its internal architecture includes auto-erase-before-write, ERAL (Erase All), and WRAL (Write All) commands, all self-timed with programmable status polling via DO pin during active cycles.
Power-on/off data protection circuitry ensures memory integrity across voltage transients, while the device enters EWDS (Erase/Write Disable) mode at power-up - requiring explicit EWEN command before any programming operation. Standby current is ≤5 µA over full automotive temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 words × 8 bits) - fixed x8 organization; no ORG pin support. |
| VCC range | 2.5 V to 5.5 V - supports wide-input automotive and industrial rails without level-shifting. |
| Temperature grade | -40°C to +125°C (Automotive E-grade) - qualified for under-hood and chassis-mounted applications. |
| Endurance | 1,000,000 erase/write cycles - enables long-term field calibration and logging without wear-out concerns. |
| Data retention | 200 years at +25°C - guarantees configuration persistence over product lifetime without refresh. |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - interoperable with legacy microcontrollers lacking SPI hardware. |
| Write time | 6 ms typical (TWC) - deterministic timing allows precise host software timeout management. |
| Standby current | ≤5 µA at TA = -40°C to +125°C - minimizes quiescent power in always-on systems. |
Pinout & Package
93LC56BT-E/MNY is packaged in an 8-lead 2×3 mm DFN (MNY) with exposed pad, RoHS-compliant matte tin finish. Pin 1 is laser-marked; exposed pad may be connected to VSS or left floating per design requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must remain low ≥250 ns between instructions; controls entry into Standby mode. |
| CLK | Serial Clock | Synchronizes all data transfers on rising edge; clock can be paused mid-sequence without state loss. |
| 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 signal (low = busy); enters High-Z when CS is low. |
| VSS | Ground | Reference for all I/O and internal logic; connects to exposed pad in DFN package. |
| NC | No Internal Connection | Pin 7 is unconnected - must be left floating or tied to VSS per layout best practices. |
| VCC | Power Supply | 2.5–5.5 V supply; internal POR circuit triggers at ~1.5 V to prevent partial writes during brownout. |
| ORG | Not applicable | Not present on 93LC56B-series A/B variants - organization is fixed at 8-bit; pin omitted in MNY package. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write cycles | Eliminates need for external timing control - host only waits for DO status or uses fixed 6 ms timeout. |
| Automatic ERAL before WRAL | Ensures full array is erased prior to bulk write, preventing stale data corruption without separate command sequencing. |
| Power-on/off data protection | Hardware-level lockout below VCC threshold (~1.5 V) prevents inadvertent writes during power ramp-up/down. |
| Erase/Write Enable/Disable (EWEN/EWDS) | Explicit command-based write protection - powers up in EWDS state, requiring deliberate EWEN before programming. |
| Sequential read mode | Enables continuous address increment with single CS assertion - reduces transaction overhead for block reads. |
| Industry-standard 3-wire interface | Direct drop-in replacement for legacy Microwire EEPROMs - no protocol translation or driver modification needed. |
Applications
| Automotive Body Control Unit (BCU) | Industrial Sensor Calibration Storage |
|---|---|
Use Scenario: Storing seat position presets, mirror angle configurations, and lighting profiles in vehicle door modules. IC Role / Device Role / Timing Role: Nonvolatile configuration EEPROM interfaced directly to 8-bit MCU via Microwire; accessed during power-up and user adjustment events. Use Value: Automotive-grade temperature tolerance and 200-year data retention ensure settings persist across vehicle lifetime without battery backup. | Use Scenario: Retaining factory-calibrated offset/gain coefficients and linearization tables for pressure and temperature sensors. IC Role / Device Role / Timing Role: Serial configuration memory accessed during sensor initialization; supports sequential read for fast coefficient loading. Use Value: 1M endurance enables field recalibration updates over thousands of maintenance cycles without memory wear-out. |
| Medical Infusion Pump Parameter Backup | Smart Energy Meter Firmware Configuration |
Use Scenario: Safeguarding drug library definitions, dose limits, and alarm thresholds against power loss during therapy delivery. IC Role / Device Role / Timing Role: Safety-critical nonvolatile storage with hardware write protection (EWDS default); verified via DO status polling during writes. Use Value: Power-on data protection and deterministic 6 ms write time support IEC 62304 Class C software safety requirements. | Use Scenario: Holding tariff schedules, communication keys, and metering constants updated remotely via PLC or RF link. IC Role / Device Role / Timing Role: Secure configuration store accessed by meter SoC; WRAL used for atomic full-table updates after OTA validation. Use Value: WRAL's built-in ERAL eliminates risk of partial table corruption during remote firmware updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC56B-I/MNY | Same 2 Kbit x8 EEPROM in identical 2×3 mm DFN package, but Industrial (-40°C to +85°C) grade only. | Lacks automotive qualification; unsuitable for under-hood or chassis-mounted use cases requiring AEC-Q100 compliance. | Select only for cost-sensitive non-automotive applications where extended temperature range is unnecessary. |
| AT25020B-MAHL-T | 2 Kbit SPI EEPROM (not Microwire), 1.8–5.5 V, -40°C to +125°C, 1 MHz max clock, 5 ms write time. | Requires SPI interface and different command set; no Ready/Busy pin - relies on WIP flag polling via STATUS register. | Choose when migrating to SPI-based platforms or when leveraging Atmel's enhanced security features like software write protection. |
Compared with 93LC56B-I/MNY, the 93LC56BT-E/MNY adds automotive qualification and tighter VCC min spec (2.5 V vs 1.8 V), while AT25020B-MAHL-T trades Microwire simplicity for SPI flexibility and lacks hardware-level Ready/Busy signaling.
Availability
93LC56BT-E/MNY is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and medical device design requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for 93LC56BT-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 microcontroller, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93LC56 series belongs to Microchip's legacy Microwire-compatible EEPROM product line, designed specifically for cost-sensitive, low-power embedded systems requiring simple 3-wire nonvolatile storage with robust data integrity.
FAQ
What is the memory organization of the 93LC56BT-E/MNY?
The 93LC56BT-E/MNY has a fixed 256 × 8-bit (2 Kbit) organization. It is a 'B'-series variant with no ORG pin - unlike 'C' versions, it does not support configurable 8-/16-bit word size. This simplifies PCB layout and firmware design by eliminating external ORG biasing requirements. The 93LC56BT-E/MNY strictly operates in x8 mode.
Does the 93LC56BT-E/MNY require an external pull-up resistor on the DO pin?
No, the 93LC56BT-E/MNY does not require an external pull-up on DO. The DO pin actively drives high/low during read or Ready/Busy status reporting and enters High-Z when deselected (CS low) or idle. However, if DI and DO are shorted (shared bus), a current-limiting resistor is recommended to prevent bus conflict during dummy-zero read preamble - this applies to the 93LC56BT-E/MNY only in shared-bus configurations.
How is write protection implemented on the 93LC56BT-E/MNY?
Write protection on the 93LC56BT-E/MNY is implemented via Erase/Write Enable/Disable (EWEN/EWDS) commands. The device powers up in EWDS mode, blocking all erase/write operations until an explicit EWEN instruction is issued. After programming, executing EWDS restores protection. This hardware-enforced mechanism prevents accidental writes during power transients or firmware glitches - a critical feature for the 93LC56BT-E/MNY in automotive safety systems.
What is the maximum clock frequency supported by the 93LC56BT-E/MNY?
The 93LC56BT-E/MNY supports a maximum clock frequency of 3 MHz at VCC ≥ 4.5 V, 2 MHz at 2.5 V ≤ VCC < 4.5 V, and 1 MHz at 1.8 V ≤ VCC < 2.5 V. Since the 93LC56BT-E/MNY operates from 2.5–5.5 V, its usable range is 2–3 MHz. Clock timing parameters (TCKH, TCKL, TDIS, etc.) are fully specified across this range in the official DS21794G datasheet.
Can the 93LC56BT-E/MNY be used in place of a 93LC56B-I/MNY on the same PCB?
Yes, the 93LC56BT-E/MNY is pin-compatible and functionally identical to the 93LC56B-I/MNY in the same MNY (2×3 mm DFN) package, differing only in temperature grade (E-grade automotive vs I-grade industrial) and associated qualification testing. No PCB or firmware changes are required for substitution - the 93LC56BT-E/MNY meets all electrical and timing specs of the industrial version while adding AEC-Q100 alignment for automotive deployment.
93LC56BT-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:
- 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:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (2x3)
93LC56BT-E/MNY FAQ
1.How can I place an order for 93LC56BT-E/MNY through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC56BT-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 93LC56BT-E/MNY reliable?
The price and inventory of 93LC56BT-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 93LC56BT-E/MNY is usually 5 days.
3.What payment methods are accepted for 93LC56BT-E/MNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC56BT-E/MNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC56BT-E/MNY?
93LC56BT-E/MNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC56BT-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 93LC56BT-E/MNY?
For technical support, including 93LC56BT-E/MNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC56BT-E/MNY requirements.
6.How does Aetrix verify that 93LC56BT-E/MNY is sourced from the original manufacturer or authorized distributors?
All 93LC56BT-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 93LC56BT-E/MNY meets industry standards.
7.What is the process for return or replacement of 93LC56BT-E/MNY?
All 93LC56BT-E/MNY units undergo pre-shipment inspection (PSI). If there is an issue with 93LC56BT-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 93LC56BT-E/MNY part is unused and in its original packaging.
Return procedure for 93LC56BT-E/MNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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