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Microchip Technology 93LC46BT-E/ST15KVAO
- Part No.:
- 93LC46BT-E/ST15KVAO
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
93LC46BT-E/ST15KVAO.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,992
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Product details
Overview
93LC46BT-E/ST15KVAO 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, -40°C to +125°C automotive temperature grade, and self-timed erase/write cycles. It operates in dedicated 16-bit organization (no ORG pin), supports Ready/Busy status polling via DO, and delivers 1,000,000 erase/write cycles with >200 years data retention - used for configuration storage in engine control units and automotive sensor modules.
For engineers reviewing the 93LC46BT-E/ST15KVAO datasheet, 93LC46BT-E/ST15KVAO pinout, 93LC46BT-E/ST15KVAO application, or 93LC46BT-E/ST15KVAO equivalent, key selection criteria include its automotive-grade temperature support, 16-bit fixed word size, TSSOP-8 package with exposed pad, Microwire protocol compliance, and integrated power-on/off data protection circuitry.
Technical Context
The 93LC46BT-E/ST15KVAO implements a synchronous 3-wire serial interface (CS, CLK, DI/DO) with start-bit detection and opcode-driven command set including READ, WRITE, ERASE, ERAL, WRAL, EWEN, and EWDS. Its internal logic enforces automatic erase-before-write and full-array erase-all (ERAL) with 6 ms typical cycle time at VCC ≥ 4.5 V.
It features dual-voltage power-on reset detection (VPOR = 1.5 V typ. for LC series), standby current ≤ 5 µA at I-temp and E-temp, and clock frequency up to 3 MHz at VCC ≥ 4.5 V. The device powers up in EWDS (Erase/Write Disable) mode and requires explicit EWEN before programming - ensuring robust immunity against accidental writes during power transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Kbit (64 words × 16 bits) - fixed x16 organization; no ORG pin required. |
| Supply Voltage | 2.5 V to 5.5 V - supports wide-range automotive rail operation; VPOR threshold 1.5 V ensures reliable power-up data protection. |
| Temperature Range | -40°C to +125°C (Automotive E-grade) - qualified for under-hood and safety-critical ECUs. |
| Endurance | 1,000,000 erase/write cycles - enables long-term field calibration and firmware parameter updates. |
| Data Retention | >200 years at 25°C - guarantees nonvolatile storage integrity over full vehicle lifecycle. |
| Interface Protocol | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - interoperable with legacy microcontrollers without SPI hardware. |
| Write Cycle Time | 6 ms typical (TWC) - self-timed; eliminates need for external timing control in host firmware. |
Pinout & Package
93LC46BT-E/ST15KVAO is packaged in an 8-lead TSSOP (ST) with exposed thermal pad (pin 8 not connected; pad tied to VSS per Microchip packaging spec). Pin functions are fully defined in DS20001749K-page 12.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; initiates self-timed write on falling edge (93LC series). |
| 2 (CLK) | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcodes, addresses, and data; stoppable mid-sequence. |
| 3 (DI) | Data Input | Accepts start bit, instruction opcodes, address bits, and write data; shares bidirectional bus with DO when externally wired. |
| 4 (DO) | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z on CS falling edge; requires CS high ≥250 ns to sample status. |
| 5 (VSS) | Ground | Reference for all I/O and internal logic; exposed pad (not pin 5) must be connected to system ground for thermal and EMI performance. |
| 6 (NC) | No Internal Connection | Pin 6 is unconnected - no routing or termination required; electrically isolated from die. |
| 7 (ORG) | Organization Select | Not applicable - 93LC46B devices have fixed x16 organization; ORG pin is NC (no internal connection) per Device Selection Table. |
| 8 (VCC) | Power Supply | 2.5–5.5 V supply input; internal POR circuit activates below 1.5 V to inhibit all operations until stable. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed Erase/Write Cycles | Eliminates host MCU timing overhead - 6 ms typical TWC allows deterministic firmware scheduling without polling delays. |
| Automatic Erase All (ERAL) Before Write All (WRAL) | Ensures full-array consistency in single-command updates - critical for boot configuration tables and security keys. |
| Power-On/Off Data Protection | Hardware-enforced write inhibition below 1.5 V VCC - prevents corruption during brown-out or hot-swap events. |
| Erase/Write Enable/Disable (EWEN/EWDS) | Explicit software-controlled lockout - enables safe default-disabled state with selective enable only during valid update windows. |
| Ready/Busy Status via DO Pin | Enables efficient polling-based host control - avoids fixed delays and reduces CPU wait states during programming. |
Applications
| Engine Control Unit (ECU) Calibration Storage | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Storing trim values, fuel map offsets, and adaptive learning parameters that persist across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration memory interfaced directly to 8-bit/16-bit MCU via Microwire; accessed during startup and runtime re-calibration. Use Value: 1M endurance and 200-year retention ensure calibration integrity over 15+ year vehicle service life; E-grade temp rating supports under-hood mounting. |
Use Scenario: Holding door lock logic states, window position memory, and lighting configuration profiles. IC Role / Device Role / Timing Role: Serial EEPROM providing persistent user preference storage; accessed asynchronously by BCM microcontroller during wake-up or button press. Use Value: Low 5 µA standby current extends battery life in sleep mode; 3-wire interface minimizes GPIO usage on resource-constrained MCUs. |
| Advanced Driver Assistance Systems (ADAS) Sensor Offset Compensation | Automotive Infotainment System Boot Configuration |
Use Scenario: Storing factory-calibrated offset corrections for radar or camera sensors subject to thermal drift. IC Role / Device Role / Timing Role: Dedicated x16-word memory storing 16-bit compensation coefficients; updated only during service-mode calibration routines. Use Value: Fixed 16-bit organization matches sensor register width - eliminates host-side bit-packing; automotive temp range covers full operational envelope. |
Use Scenario: Holding display brightness settings, audio equalizer presets, and Bluetooth pairing IDs across power cycles. IC Role / Device Role / Timing Role: Microwire EEPROM accessed early in boot sequence to configure UI behavior before OS load. Use Value: 6 ms write time enables fast save of user preferences; RoHS-compliant Pb-free finish meets automotive ELV directive requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC46B-I/ST | Industrial grade (-40°C to +85°C); same 64×16-bit organization, TSSOP-8 package, and electrical specs. | Not qualified for under-hood or safety-critical automotive use; suitable for cabin electronics or industrial controls. | Select for cost-sensitive non-automotive designs where extended temperature is unnecessary. |
| AT25010B-MAHL-T | SPI interface (4-wire), 1 Kbit (128×8), 1.8–5.5 V, -40°C to +125°C; no ERAL/WRAL commands. | Lacks Microwire compatibility and array-level erase/write; requires SPI-capable host controller. | Choose when migrating to SPI infrastructure or when 8-bit word access suffices and Microwire legacy is not required. |
Compared with 93LC46B-I/ST, the 93LC46BT-E/ST15KVAO adds automotive qualification and tighter voltage monitoring; versus AT25010B-MAHL-T, it retains Microwire compatibility and provides hardware-accelerated full-array operations essential for automotive firmware updates.
Availability
93LC46BT-E/ST15KVAO is available at Aetrix Electronics and suitable for automotive engine management systems, body control modules, ADAS calibration storage, and infotainment configuration requiring stable component supply across multi-year production programs.
Supply support for 93LC46BT-E/ST15KVAO 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 93LC46B family is part of Microchip's legacy serial EEPROM product line designed specifically for cost-sensitive, low-power, and automotive-qualified nonvolatile storage in resource-constrained embedded systems.
FAQ
What is the memory organization of the 93LC46BT-E/ST15KVAO?
The 93LC46BT-E/ST15KVAO is a fixed 64 × 16-bit (1 Kbit) device - designated as a 'B' variant - meaning it operates exclusively in 16-bit word mode with no ORG pin functionality. This eliminates external configuration logic and simplifies interface timing compared to 'C' variants requiring ORG pin control.
Does the 93LC46BT-E/ST15KVAO require an external pull-up resistor on the DO pin?
No, the 93LC46BT-E/ST15KVAO does not require an external pull-up on DO. The DO pin actively drives high/low during READ and Ready/Busy status reporting, and enters High-Z when CS is low or during non-read operations. External pull-ups may interfere with status polling accuracy.
What is the minimum VCC required for reliable operation of the 93LC46BT-E/ST15KVAO?
The 93LC46BT-E/ST15KVAO requires VCC ≥ 2.5 V for guaranteed functional operation across its full automotive temperature range. Its internal voltage detect (VPOR) triggers at ~1.5 V to disable all operations during power ramp-up or brown-out, preventing data corruption.
Can the 93LC46BT-E/ST15KVAO be used in a shared bus configuration with DI and DO connected together?
Yes, but with caution: DI and DO can be wired together using a series resistor (e.g., 10 kΩ) to prevent bus conflict during the dummy zero preceding READ. Without the resistor, undefined voltage levels may occur if address bit A0 is high, risking communication errors.
Is the exposed pad on the TSSOP-8 package of the 93LC46BT-E/ST15KVAO electrically connected?
Yes - the exposed pad on the 93LC46BT-E/ST15KVAO's TSSOP-8 package is internally connected to VSS and must be soldered to a PCB ground plane for optimal thermal dissipation and EMI performance. Per Microchip Packaging Specification, it is not optional or floating.
93LC46BT-E/ST15KVAO Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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 ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
93LC46BT-E/ST15KVAO FAQ
1.How can I place an order for 93LC46BT-E/ST15KVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC46BT-E/ST15KVAO 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 93LC46BT-E/ST15KVAO reliable?
The price and inventory of 93LC46BT-E/ST15KVAO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC46BT-E/ST15KVAO is usually 5 days.
3.What payment methods are accepted for 93LC46BT-E/ST15KVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC46BT-E/ST15KVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC46BT-E/ST15KVAO?
93LC46BT-E/ST15KVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC46BT-E/ST15KVAO 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 93LC46BT-E/ST15KVAO?
For technical support, including 93LC46BT-E/ST15KVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC46BT-E/ST15KVAO requirements.
6.How does Aetrix verify that 93LC46BT-E/ST15KVAO is sourced from the original manufacturer or authorized distributors?
All 93LC46BT-E/ST15KVAO 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 93LC46BT-E/ST15KVAO meets industry standards.
7.What is the process for return or replacement of 93LC46BT-E/ST15KVAO?
All 93LC46BT-E/ST15KVAO units undergo pre-shipment inspection (PSI). If there is an issue with 93LC46BT-E/ST15KVAO, 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 93LC46BT-E/ST15KVAO part is unused and in its original packaging.
Return procedure for 93LC46BT-E/ST15KVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93LC46BT-E/ST15KVAO Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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M24C02-FMC6TG
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