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Microchip Technology 93LC56B-I/SN15KVAO
- Part No.:
- 93LC56B-I/SN15KVAO
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC56B-I/SN15KVAO.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,539
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Product details
Overview
93LC56B-I/SN15KVAO from Microchip Technology Inc. is a 2 Kbit (128 × 16-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, operating from 2.5V to 5.5V, rated for -40°C to +85°C industrial temperature range, and housed in an 8-lead SOIC (SN) package. It delivers 1 million erase/write cycles, >200 years data retention, and integrated power-on/off data protection for embedded configuration storage in microcontroller systems.
For engineers reviewing the 93LC56B-I/SN15KVAO datasheet, 93LC56B-I/SN15KVAO pinout, 93LC56B-I/SN15KVAO application, or 93LC56B-I/SN15KVAO equivalent, key selection criteria include guaranteed 16-bit word organization (no ORG pin), industrial-grade temperature support, SOIC-8 mechanical compatibility, self-timed write/erase with Ready/Busy status, and compliance with Microwire serial protocol timing at up to 3 MHz (VCC ≥ 4.5V).
Technical Context
This device implements a synchronous serial interface using CS, CLK, and DI/DO pins with no internal ORG pin-fixed 128 × 16-bit memory mapping. All instructions (READ, WRITE, ERASE, ERAL, WRAL, EWEN/EWDS) are executed via rising-edge clocked bit streams, with DO providing both data output and Ready/Busy status polling during programming.
Power management includes automatic low-VCC lockout (VPOR ≈ 1.5 V), standby current ≤1 µA, and hardware-enabled write protection: device powers up in EWDS mode, requiring explicit EWEN before any erase/write operation. Erase/write cycles are fully self-timed (TWC = 6 ms), with automatic pre-erase and ERAL-initiated full-array erase prior to WRAL.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (128 words × 16 bits); fixed x16 organization eliminates external ORG logic routing. |
| VCC range | 2.5V to 5.5V; supports direct connection to 3.3V or 5V MCU I/O rails without level shifting. |
| Endurance | 1,000,000 erase/write cycles; enables reliable field-updatable calibration or runtime parameter storage. |
| Data retention | >200 years at 25°C; suitable for long-lifecycle industrial equipment with infrequent writes. |
| Write cycle time | 6 ms typical (TWC); deterministic timing allows precise host software timeout handling. |
| Max clock frequency | 3 MHz at VCC ≥ 4.5V; enables fast bulk reads (20 CLK cycles per 16-bit word) in time-critical boot sequences. |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO); interoperable with legacy MCU peripheral modules lacking SPI hardware. |
| Temperature grade | Industrial (-40°C to +85°C); validated for use in motor drives, PLC I/O modules, and HVAC controllers. |
Pinout & Package
8-lead SOIC (SN) package, 3.9 mm × 4.9 mm body, 1.27 mm pitch, RoHS-compliant matte tin finish. Pin 1 marked by notch or laser dot; exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between commands; deselects device into standby (ICC ≤1 µA). |
| CLK | Serial Clock | Rising-edge synchronized I/O; clock can pause mid-transfer; no CLK required during 6 ms self-timed write. |
| DI | Data Input | Accepts Start bit, opcode, address, and data; high-impedance when CS low; requires pull-down if shared with DO. |
| DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge; status valid after TSV delay. |
| VSS | Ground | Reference for all I/O and internal circuitry; requires low-impedance connection to minimize noise coupling. |
| NC | No Connect | Pin 7 is unconnected internally; must be left floating or tied to VSS per layout best practice. |
| VCC | Power Supply | 2.5–5.5V supply; internal POR triggers at ~1.5V; decoupling capacitor (0.1 µF) required within 5 mm. |
| ORG | Organization | Not present on 93LC56B; dedicated x16 mode eliminates configuration uncertainty and PCB routing overhead. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for host-controlled timing loops; 6 ms fixed duration simplifies firmware state machine design. |
| Automatic ERAL before WRAL | Ensures clean memory state before bulk write; removes requirement for separate erase command in configuration update routines. |
| Power-on/off data protection | Hardware lockout below 1.5V prevents partial writes during brown-out or hot-swap events. |
| Ready/Busy status on DO | Enables non-blocking polling instead of fixed delays; reduces average write latency by up to 40% in interrupt-driven systems. |
| EWEN/EWDS write protection | Prevents accidental overwrites; mandatory EWEN before each write adds security layer for critical calibration tables. |
| 128 × 16-bit fixed organization | Matches common MCU register widths; avoids software bit-packing for 16-bit sensor offsets or PID coefficients. |
Applications
| Industrial Sensor Calibration | Motor Drive Configuration |
|---|---|
Use Scenario: Storing factory-trimmed ADC gain/offset values and temperature compensation coefficients for analog front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed once per power cycle during system initialization; supports sequential read at 3 MHz for fast boot. Use Value: Eliminates external trimming potentiometers and manual calibration; enables field recalibration via UART command with verified 1M-cycle endurance. | Use Scenario: Holding motor-specific parameters (commutation angles, current limits, acceleration profiles) in brushless DC motor controllers. IC Role / Device Role / Timing Role: Persistent parameter store updated only during commissioning or firmware upgrade; accessed via MCU GPIO-banged Microwire interface. Use Value: Allows single hardware design to support multiple motor models via software-configurable EEPROM maps; >200-year retention ensures lifetime validity. |
| Medical Device Settings | Smart Energy Meter Firmware Patch |
Use Scenario: Securing user-adjustable therapy parameters (dose rate, alarm thresholds) in portable infusion pumps with regulatory audit trail requirements. IC Role / Device Role / Timing Role: Tamper-resistant settings vault; write-protected via EWEN/EWDS sequence; accessed under RTOS task control with CRC validation. Use Value: Meets IEC 62304 Class C software safety requirements through hardware-enforced write disable and deterministic 6 ms write cycles. | Use Scenario: Storing delta patches applied to flash-resident meter firmware during OTA updates to minimize bandwidth and downtime. IC Role / Device Role / Timing Role: Low-latency patch staging area; WRAL instruction writes full 2 Kbit image atomically after ERAL pre-erase. Use Value: Reduces update window by 70% vs. byte-by-byte writes; 3.3V operation matches meter's main power rail without auxiliary regulators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC56A-I/SN | 8-bit organization (256 × 8), identical VCC range, package, and timing. | Requires software byte-swapping for 16-bit MCU registers; increases firmware complexity and code size. | Select only when legacy 8-bit bus architecture or strict pin-for-pin replacement of prior 93LC56A designs is required. |
| AT25020B-MAHL-T | SPI interface (4-wire), 2 Kbit x8, 1.8–5.5V, same endurance and retention. | Needs additional chip select line and SPI peripheral; incompatible instruction set and status reporting (no DO-based R/B). | Choose when migrating to SPI-based platforms or consolidating with other Atmel SPI EEPROMs in BOM. |
Compared with 93LC56A-I/SN, the 93LC56B-I/SN15KVAO eliminates byte alignment overhead in 16-bit systems; versus AT25020B-MAHL-T, it retains Microwire compatibility for legacy MCU peripherals but trades SPI flexibility for simpler 3-wire routing.
Availability
93LC56B-I/SN15KVAO is available at Aetrix Electronics and suitable for industrial sensor calibration, motor drive configuration, and medical device settings requiring stable component supply across multi-year production programs.
Supply support for 93LC56B-I/SN15KVAO 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, with global design and manufacturing operations.
The 93LCxx family was designed specifically for cost-sensitive, low-power embedded systems requiring robust nonvolatile storage with minimal pin count and software overhead-targeting applications in industrial automation, automotive subsystems, and consumer electronics.
FAQ
What is the memory organization of the 93LC56B-I/SN15KVAO?
The 93LC56B-I/SN15KVAO has a fixed 128-word × 16-bit organization. Unlike 'C' variants, it lacks an ORG pin-ensuring deterministic x16 addressing without external logic. This matches native 16-bit MCU register widths and avoids software bit manipulation during read/write operations, directly supporting applications like motor control coefficient storage.
Does the 93LC56B-I/SN15KVAO require an external ORG pin connection?
No, the 93LC56B-I/SN15KVAO does not have an ORG pin. Pin 6 in the SOIC-8 package is NC (No Connect), confirming its dedicated 16-bit configuration. This eliminates routing complexity and potential misconfiguration risks associated with ORG pin biasing, making it ideal for space-constrained PCBs where pin count and layout simplicity are critical.
What is the maximum clock frequency supported by the 93LC56B-I/SN15KVAO?
The 93LC56B-I/SN15KVAO supports up to 3 MHz clock frequency when VCC is 4.5V to 5.5V. At 2.5V to 4.5V, the maximum is 2 MHz. This timing is defined in Table 1-2 (A1) of DS21794G and enables fast sequential reads (20 clocks per 16-bit word), reducing boot-time configuration loading latency in real-time embedded systems.
How does write protection work on the 93LC56B-I/SN15KVAO?
The 93LC56B-I/SN15KVAO powers up in Erase/Write Disable (EWDS) mode. An explicit EWEN instruction must precede any ERASE or WRITE command. After programming, executing EWDS re-enables hardware protection. This two-step process prevents accidental overwrites during noise events or firmware exceptions, a critical feature for medical and industrial safety-critical parameter storage.
Is the 93LC56B-I/SN15KVAO compatible with standard Microwire protocol?
Yes, the 93LC56B-I/SN15KVAO is fully Microwire-compatible: it uses CS/CLK/DI/DO signals, accepts 9-bit instruction frames (Start bit + 2-bit opcode + 7-bit address), and provides Ready/Busy status on DO. Its timing parameters-including TCKH, TCKL, and TPD-meet Microwire specifications, ensuring interoperability with legacy microcontrollers featuring dedicated Microwire peripherals.
93LC56B-I/SN15KVAO Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- 3 MHz
- Write Cycle Time - Word, Page:
- 6ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
93LC56B-I/SN15KVAO FAQ
1.How can I place an order for 93LC56B-I/SN15KVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC56B-I/SN15KVAO 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 93LC56B-I/SN15KVAO reliable?
The price and inventory of 93LC56B-I/SN15KVAO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC56B-I/SN15KVAO is usually 5 days.
3.What payment methods are accepted for 93LC56B-I/SN15KVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC56B-I/SN15KVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC56B-I/SN15KVAO?
93LC56B-I/SN15KVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC56B-I/SN15KVAO 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 93LC56B-I/SN15KVAO?
For technical support, including 93LC56B-I/SN15KVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC56B-I/SN15KVAO requirements.
6.How does Aetrix verify that 93LC56B-I/SN15KVAO is sourced from the original manufacturer or authorized distributors?
All 93LC56B-I/SN15KVAO 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 93LC56B-I/SN15KVAO meets industry standards.
7.What is the process for return or replacement of 93LC56B-I/SN15KVAO?
All 93LC56B-I/SN15KVAO units undergo pre-shipment inspection (PSI). If there is an issue with 93LC56B-I/SN15KVAO, 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 93LC56B-I/SN15KVAO part is unused and in its original packaging.
Return procedure for 93LC56B-I/SN15KVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93LC56B-I/SN15KVAO Tags
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