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Microchip Technology 93LC76AT-E/SN15KVAO
- Part No.:
- 93LC76AT-E/SN15KVAO
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC76AT-E/SN15KVAO.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,225
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Product details
Overview
93LC76AT-E/SN15KVAO from Microchip Technology Inc. is an 8Kbit, 512 × 16-bit organization, automotive-grade serial EEPROM with Microwire-compatible 3-wire interface, 2.5–5.5V supply range, and integrated Ready/Busy status signaling. It features self-timed erase/write cycles, automatic ERAL before WRAL, and power-on/off data protection - deployed in engine control units for calibration storage.
For engineers reviewing the 93LC76AT-E/SN15KVAO datasheet, 93LC76AT-E/SN15KVAO pinout, 93LC76AT-E/SN15KVAO application, or 93LC76AT-E/SN15KVAO equivalent, key selection criteria include automotive temperature rating (−40°C to +125°C), 16-bit word organization, PE/ORG pin control, 5 ms program cycle time, and SOIC-8 package compatibility with legacy board layouts.
Technical Context
This device implements a synchronous serial Microwire interface with CS/CLK/DI/DO signals and two dedicated control pins: ORG selects x8/x16 memory mapping, while PE enables/disables write operations. All instructions - READ, WRITE, ERASE, ERAL, WRAL, EWEN, EWDS - are clocked in via rising-edge CLK transitions, with DO serving dual role as data output and Ready/Busy indicator.
Internal logic enforces strict sequencing: EWEN must precede any erase/write; auto-erase occurs before write; ERAL initiates full-array erase; WRAL performs full-array write after implicit ERAL. VCC detection thresholds (1.5V for low-voltage operation) and power-loss protection ensure data integrity during brown-out conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (512 × 16-bit organization) |
| Supply voltage | 2.5–5.5 V - supports wide-range automotive power rails without external regulators |
| Temperature grade | Automotive (E): −40°C to +125°C - qualified for under-hood ECU deployment |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - interoperable with legacy microcontrollers lacking SPI hardware |
| Write endurance | 1,000,000 erase/write cycles - sufficient for frequent firmware parameter updates over 15+ year vehicle life |
| Data retention | 200 years at +25°C - ensures calibration data persistence across vehicle ownership cycles |
| Program cycle time | 5 ms (TWC) - deterministic timing enables precise host software timeout handling |
Pinout & Package
8-lead SOIC (SN) package with standard 150-mil body width and 1.27 mm pitch. Pin 1 marked by laser dot; exposed pad not present. RoHS-compliant matte tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS | Chip Select | Active-high enable; minimum 250 ns low time required between commands; holds device in Standby when low |
| 2 CLK | Serial Clock | Rising-edge synchronized I/O; clocking stops during self-timed erase/write; TCKH/TCKL vary with VCC |
| 3 DI | Data Input | Accepts Start bit, opcode, address, and write data; must be stable before CLK rise per AC specs |
| 4 DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS fall; requires TCSL before status polling |
| 5 VSS | Ground | Reference for all I/O and internal circuitry; must be low-impedance connection |
| 6 ORG | Organization select | Logic high → 16-bit mode; logic low → 8-bit mode; tied externally; not present on A/B variants |
| 7 PE | Program Enable | Logic high → write enabled; logic low → write inhibited; mandatory for WRAL/ERASE; must not float |
| 8 VCC | Power supply | 2.5–5.5 V input; internal POR triggers at ~1.5 V; decoupling capacitor required near pin |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for host-controlled timing delays - simplifies firmware and improves reliability |
| Automatic ERAL before WRAL | Guarantees clean array state prior to full-write - prevents partial-data corruption during bulk updates |
| Ready/Busy status on DO | Enables non-blocking polling instead of fixed timeouts - optimizes CPU utilization in real-time systems |
| Power-on/off data protection | Hardware-enforced write inhibition below VCC threshold - prevents accidental writes during power ramp |
| 100% tested 1M endurance | Validated at 25°C/5.0V - provides design margin for extended life in automotive thermal environments |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance System (ADAS) |
|---|---|
Use Scenario: Storing adaptive fuel trim tables, knock sensor learning values, and emission calibration maps subject to frequent field updates. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with deterministic 5 ms write latency and guaranteed data retention over 15-year vehicle service life. Use Value: Enables OEMs to deploy over-the-air calibration updates without requiring EEPROM reprogramming hardware or risking data corruption during ignition cycling. | Use Scenario: Retaining camera lens distortion coefficients, radar object tracking history, and sensor fusion bias offsets across power cycles. IC Role / Device Role / Timing Role: Automotive-grade serial EEPROM interfacing directly with ADAS SoC's Microwire peripheral at 2 MHz clock rate. Use Value: Provides fail-safe parameter persistence even after sudden battery disconnect, meeting ISO 26262 ASIL-B functional safety requirements for calibration data integrity. |
| Body Control Module (BCM) | Electric Power Steering (EPS) |
Use Scenario: Saving user-configurable settings (window position, mirror angle, lighting profiles) and door lock event logs. IC Role / Device Role / Timing Role: Low-power 8Kbit storage accessed intermittently via 3-wire bus; standby current ≤5 µA minimizes parasitic drain. Use Value: Extends vehicle battery life during extended parking periods while maintaining personalized settings across ignition cycles. | Use Scenario: Archiving motor phase current signatures, torque sensor zero-point drift compensation, and fault event timestamps. IC Role / Device Role / Timing Role: High-reliability EEPROM operating at +125°C ambient with validated 1M-cycle endurance under continuous vibration stress. Use Value: Supports ASIL-C EPS system certification by ensuring critical steering assist parameters survive 10+ years of harsh under-hood thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC76BT-E/SN | Same 512×16-bit organization, identical SOIC-8 package, but lacks ORG and PE pins - fixed 16-bit mode with always-enabled write | No external write protection or organization flexibility; unsuitable where dynamic word-size switching or hardware write-disable is required | Select only if board layout omits ORG/PE routing and firmware handles all write protection in software |
| AT25DF041A-SHN-T | 4 Mbit SPI NOR Flash with sector erase; no Ready/Busy pin; requires command sequence for write enable; different timing model | Higher density but slower random access; no built-in auto-erase; requires explicit WREN before each page program | Choose for firmware storage where sequential reads dominate and 5 ms deterministic write latency is not required |
Compared with 93LC76BT-E/SN, the 93LC76AT-E/SN15KVAO adds hardware-level write disable (PE) and configurable word size (ORG), enabling safer field updates; versus AT25DF041A-SHN-T, it delivers guaranteed sub-6 ms write completion with no command overhead, critical for real-time calibration logging.
Availability
93LC76AT-E/SN15KVAO is available at Aetrix Electronics and suitable for engine control units, ADAS modules, and electric power steering systems requiring stable component supply with automotive qualification and long-term lifecycle support.
Supply support for 93LC76AT-E/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 microcontroller, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93LCxx family was designed specifically for cost-sensitive, low-power, automotive-qualified serial EEPROM applications requiring Microwire compatibility, hardware write protection, and robust data retention in harsh environments.
FAQ
What is the maximum clock frequency supported by the 93LC76AT-E/SN15KVAO?
The 93LC76AT-E/SN15KVAO supports up to 3 MHz clock frequency when VCC is 4.5–5.5 V, 2 MHz at 2.5–4.5 V, and 1 MHz at 1.8–2.5 V. For this specific part (E-temp, 2.5–5.5 V range), the maximum usable clock is 3 MHz at VCC ≥ 4.5 V. The 93LC76AT-E/SN15KVAO must meet TCKH/TCKL timing windows per Table 1-2 to ensure reliable instruction execution.
Does the 93LC76AT-E/SN15KVAO require an external pull-up resistor on the DO line?
No, the 93LC76AT-E/SN15KVAO does not require an external pull-up on DO. Its output buffer actively drives high or low during read/status, and enters High-Z when CS is low or during non-read states. However, if DI and DO are shorted (shared bus), a series resistor is recommended to prevent bus conflict during dummy-zero read phase - a design choice independent of DO pull-up needs. The 93LC76AT-E/SN15KVAO datasheet explicitly states DO is not open-drain.
How is write protection implemented on the 93LC76AT-E/SN15KVAO?
Write protection on the 93LC76AT-E/SN15KVAO is implemented via two independent hardware mechanisms: the Program Enable (PE) pin must be held high to allow any erase/write operation, and the Erase/Write Disable (EWDS) command must be cleared via EWEN before programming. Both conditions must be satisfied - tying PE low permanently disables writes regardless of EWEN state. This dual-layer protection prevents accidental writes during power transients or firmware faults. The 93LC76AT-E/SN15KVAO requires PE = VCC and EWEN execution prior to every WRAL or ERASE.
Can the 93LC76AT-E/SN15KVAO be used in 8-bit mode?
Yes, the 93LC76AT-E/SN15KVAO can operate in 8-bit mode by connecting the ORG pin to VSS (ground). When ORG = 0, the device uses 1024 × 8-bit organization and executes x8 instruction set (Table 1-4), including 22-clock READ/WRITE cycles and 14-clock EWEN/ERAL. This mode is fully supported per datasheet Section 2.7 and Table 1-4. The 93LC76AT-E/SN15KVAO retains all automotive temp rating and timing specs in either mode.
What is the purpose of the "15KVAO" suffix in 93LC76AT-E/SN15KVAO?
The "15KVAO" suffix in 93LC76AT-E/SN15KVAO is Microchip's date and traceability code: "15" indicates week 15 of the year, "K" is the year code (2019), "V" denotes Pb-free Matte Tin finish, "AO" is an alphanumeric lot traceability identifier. This matches Microchip's marking convention in DS21796M-page 13, where "3L76CT" is the base marking for 93LC76C in SOIC (SN) package, followed by temperature grade (E), year/week, and lot code. The full 93LC76AT-E/SN15KVAO identifies a specific production batch.
93LC76AT-E/SN15KVAO Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 8Kbit
- Memory Organization:
- 1K x 8
- Memory Interface:
- Microwire
- Clock Frequency:
- 3 MHz
- Write Cycle Time - Word, Page:
- 5ms
- 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-SOIC
93LC76AT-E/SN15KVAO FAQ
1.How can I place an order for 93LC76AT-E/SN15KVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC76AT-E/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 93LC76AT-E/SN15KVAO reliable?
The price and inventory of 93LC76AT-E/SN15KVAO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC76AT-E/SN15KVAO is usually 5 days.
3.What payment methods are accepted for 93LC76AT-E/SN15KVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC76AT-E/SN15KVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC76AT-E/SN15KVAO?
93LC76AT-E/SN15KVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC76AT-E/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 93LC76AT-E/SN15KVAO?
For technical support, including 93LC76AT-E/SN15KVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC76AT-E/SN15KVAO requirements.
6.How does Aetrix verify that 93LC76AT-E/SN15KVAO is sourced from the original manufacturer or authorized distributors?
All 93LC76AT-E/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 93LC76AT-E/SN15KVAO meets industry standards.
7.What is the process for return or replacement of 93LC76AT-E/SN15KVAO?
All 93LC76AT-E/SN15KVAO units undergo pre-shipment inspection (PSI). If there is an issue with 93LC76AT-E/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 93LC76AT-E/SN15KVAO part is unused and in its original packaging.
Return procedure for 93LC76AT-E/SN15KVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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