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Microchip Technology 93LC46B-I/SN15KVAO
- Part No.:
- 93LC46B-I/SN15KVAO
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC46B-I/SN15KVAO.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,474
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Product details
Overview
93LC46B-I/SN15KVAO from Microchip Technology Inc. is a 1 Kbit (64 × 16-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 2.5–5.5 V supply range, industrial temperature grade (−40°C to +85°C), and SOIC-8 package. It features self-timed erase/write cycles, automatic ERAL before WRAL, and Ready/Busy status via DO pin - used for configuration storage in microcontroller-based embedded systems.
For engineers reviewing the 93LC46B-I/SN15KVAO datasheet, 93LC46B-I/SN15KVAO pinout, 93LC46B-I/SN15KVAO application, or 93LC46B-I/SN15KVAO equivalent, key selection criteria include guaranteed 16-bit word organization (no ORG pin), 1 million erase/write endurance, 200-year data retention, and compatibility with legacy Microwire controllers requiring minimal software overhead.
Technical Context
This device implements a synchronous serial interface with CS, CLK, and DI/DO pins operating at up to 3 MHz (VCC ≥ 4.5 V) and supports dedicated 16-bit memory mapping without external ORG pin control. Its internal logic enforces power-on write protection and requires explicit EWEN/EWDS commands to enable/disable programming.
Timing-critical operations - including READ (18 clock cycles), WRITE (18 clocks), ERASE (10 clocks), and WRAL (18 clocks) - are fully defined across voltage and temperature ranges. The DO pin serves dual function: serial data output during READ and active-low Ready/Busy indicator during all programming cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1 Kbit organized as 64 words × 16 bits - fixed 16-bit interface simplifies alignment with 16-bit MCU peripherals. |
| VCC range | 2.5 V to 5.5 V - supports direct interfacing with 3.3 V and 5 V logic without level shifting. |
| Endurance | 1,000,000 erase/write cycles - sufficient for firmware parameter logging in industrial controllers. |
| Data retention | Greater than 200 years at 25°C - ensures long-term reliability in unattended equipment. |
| Max clock frequency | 3 MHz at VCC ≥ 4.5 V - enables fast configuration loading during system boot. |
| Write cycle time | 6 ms typical for erase/write - deterministic timing allows precise host-side polling intervals. |
| Operating temp | −40°C to +85°C (Industrial grade) - qualified for use in factory automation and outdoor metering. |
Pinout & Package
Package: 8-lead SOIC (SN), body width 3.9 mm, RoHS-compliant matte tin finish, Pb-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions to reset internal state. |
| 2 CLK | Serial Clock | Synchronizes all data transfers on rising edge; clock can be paused mid-sequence without corruption. |
| 3 DI | Data Input | Accepts Start bit, opcode, address, and data; tied to DO in shared-bus configurations with current-limiting resistor. |
| 4 DO | Data Output / Status | Outputs read data or drives low during erase/write - no external pull-up required for status polling. |
| 5 VSS | Ground | Reference for all I/O and internal circuitry; must be low-impedance connection for noise immunity. |
| 6 NC | No Connect | Internally unconnected; left floating per datasheet - no routing or termination needed. |
| 7 NC | No Connect | Same as Pin 6 - both NC pins are unused and electrically isolated. |
| 8 VCC | Power Supply | Supplies core logic and memory array; includes on-chip POR detection at 1.5 V threshold. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control - host only polls DO pin for completion. |
| Automatic ERAL before WRAL | Ensures full-array write integrity without separate erase command - reduces firmware complexity. |
| Power-on/off data protection | Hardware lockout below 1.5 V VCC prevents partial writes during brownout or power ramp. |
| Industry-standard 3-wire interface | Direct drop-in replacement for legacy Microwire EEPROMs - no driver layer changes required. |
| Ready/Busy status on DO | Enables efficient polling without additional GPIO or interrupt lines - simplifies PCB layout. |
Applications
| Industrial Sensor Calibration | Consumer Appliance Configuration |
|---|---|
Use Scenario: Storing sensor offset/gain coefficients and calibration timestamps in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during power-up and field recalibration. Use Value: Maintains accuracy over 200+ years without battery backup; withstands 1M rewrites during maintenance cycles. |
Use Scenario: Saving user preferences (temperature setpoints, cycle modes) in washing machines and HVAC remotes. IC Role / Device Role / Timing Role: Low-pin-count serial memory interfaced directly to 8-bit microcontrollers. Use Value: SOIC-8 footprint fits space-constrained PCBs; 2.5 V operation extends battery life in portable remotes. |
| Medical Device Settings Storage | Automotive Body Control Module |
Use Scenario: Retaining therapy parameters and usage logs in portable infusion pumps and diagnostic monitors. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for FDA-regulated operational data. Use Value: Industrial temp rating ensures reliability inside sealed enclosures; RoHS compliance meets medical directives. |
Use Scenario: Holding door lock actuator profiles and lighting dimming curves in vehicle BCMs. IC Role / Device Role / Timing Role: Configuration memory accessed by CAN-connected microcontrollers during wake-up. Use Value: 6 ms write time enables fast reprogramming during service mode; 5.5 V tolerance handles automotive load-dump transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC46A-I/SN | 64 × 8-bit organization; identical VCC range, timing, and package. | Requires byte-aligned access; unsuitable where 16-bit word writes are mandatory. | Select when MCU uses 8-bit data bus or firmware avoids 16-bit packing logic. |
| AT25010B-MAHL-T | SPI interface (4-wire), 1 Kbit × 8, 1.8–5.5 V, same endurance and retention. | Needs CS, CLK, DI, DO, and separate HOLD pin - increases GPIO count and firmware overhead. | Choose if existing design already uses SPI peripherals and requires multi-master support. |
Compared with 93LC46A-I/SN, the 93LC46B-I/SN15KVAO provides native 16-bit word access without software bit-packing, while AT25010B-MAHL-T offers SPI compatibility at the cost of extra pin and protocol complexity - making 93LC46B-I/SN15KVAO optimal for Microwire-limited or legacy 16-bit MCU designs.
Availability
93LC46B-I/SN15KVAO is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer appliance configuration, and medical device settings storage requiring stable component supply across extended production lifecycles.
Supply support for 93LC46B-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 components, and nonvolatile memory solutions, headquartered in Chandler, Arizona.
The 93LC46B-I/SN15KVAO belongs to Microchip's legacy 93XX serial EEPROM family, designed specifically for cost-sensitive, low-power embedded systems requiring simple 3-wire configuration storage with high reliability and long data retention.
FAQ
What is the memory organization of the 93LC46B-I/SN15KVAO?
The 93LC46B-I/SN15KVAO has a fixed 64 × 16-bit organization - meaning it stores 64 words of 16 bits each, with no ORG pin required. This differs from 'C' variants that use the ORG pin to select between 8-bit and 16-bit modes, and from 'A' variants that are strictly 128 × 8-bit. The 93LC46B-I/SN15KVAO delivers true 16-bit parallel-equivalent access over its serial interface.
Does the 93LC46B-I/SN15KVAO require an external pull-up resistor on the DO pin?
No, the 93LC46B-I/SN15KVAO does not require an external pull-up on DO for Ready/Busy polling. During programming cycles, DO actively drives low (Ready/Busy = 0) or high (Ready/Busy = 1); during READ, it drives data with sufficient sink/source capability. A pull-up is only needed if sharing DI/DO on a bidirectional bus - and even then, a current-limiting resistor (not pull-up) is recommended per Section 2.2.
What is the minimum VCC required for reliable operation of the 93LC46B-I/SN15KVAO?
The 93LC46B-I/SN15KVAO incorporates an internal voltage detector that inhibits all operations below approximately 1.5 V. Reliable read, write, and erase functions require VCC ≥ 2.5 V, as specified in the DC Characteristics table. Operation below 2.5 V may result in undefined behavior or incomplete writes - the device remains in standby until VCC rises above the POR threshold.
Can the 93LC46B-I/SN15KVAO be used in automotive applications?
The 93LC46B-I/SN15KVAO is rated for Industrial temperature range (−40°C to +85°C), not Automotive (−40°C to +125°C). While it may function in some under-hood environments, Microchip does not qualify or guarantee performance beyond +85°C. For automotive body control modules or infotainment systems requiring AEC-Q100 compliance, the 93LC46B-E/SN variant (with E-grade marking) is the approved alternative.
How does the WRAL instruction work on the 93LC46B-I/SN15KVAO?
The WRAL (Write All) instruction on the 93LC46B-I/SN15KVAO writes the same 16-bit data value to all 64 memory locations. It automatically executes an ERAL (Erase All) before writing, ensuring full-array consistency. WRAL requires VCC ≥ 4.5 V and takes 15 ms to complete. Unlike standard WRITE, WRAL does not require prior ERAL - but the device must first be placed in EWEN (Erase/Write Enable) state.
93LC46B-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:
- 1Kbit
- Memory Organization:
- 64 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 ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
93LC46B-I/SN15KVAO FAQ
1.How can I place an order for 93LC46B-I/SN15KVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC46B-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 93LC46B-I/SN15KVAO reliable?
The price and inventory of 93LC46B-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 93LC46B-I/SN15KVAO is usually 5 days.
3.What payment methods are accepted for 93LC46B-I/SN15KVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC46B-I/SN15KVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC46B-I/SN15KVAO?
93LC46B-I/SN15KVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC46B-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 93LC46B-I/SN15KVAO?
For technical support, including 93LC46B-I/SN15KVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC46B-I/SN15KVAO requirements.
6.How does Aetrix verify that 93LC46B-I/SN15KVAO is sourced from the original manufacturer or authorized distributors?
All 93LC46B-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 93LC46B-I/SN15KVAO meets industry standards.
7.What is the process for return or replacement of 93LC46B-I/SN15KVAO?
All 93LC46B-I/SN15KVAO units undergo pre-shipment inspection (PSI). If there is an issue with 93LC46B-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 93LC46B-I/SN15KVAO part is unused and in its original packaging.
Return procedure for 93LC46B-I/SN15KVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93LC46B-I/SN15KVAO Tags
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