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Microchip Technology 93LC76B-E/SN
- Part No.:
- 93LC76B-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC76B-E/SN.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,079
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Product details
Overview
93LC76B-E/SN from Microchip Technology is a 8Kbit, 512 × 16-bit organization serial EEPROM with Microwire-compatible 3-wire interface, operating from 2.5V to 5.5V, rated for automotive temperature range (–40°C to +125°C), and featuring self-timed erase/write cycles, 1M endurance, and >200-year data retention. It serves as nonvolatile configuration storage in engine control units, ADAS sensors, and automotive infotainment systems.
For engineers reviewing the 93LC76B-E/SN datasheet, 93LC76B-E/SN pinout, 93LC76B-E/SN application, or 93LC76B-E/SN equivalent, key selection considerations include its fixed 16-bit word size (no ORG pin), automotive-grade VCC range and temperature rating, absence of PE/ORG pins, and compatibility with legacy Microwire controllers requiring sequential read and Ready/Busy status polling via DO.
Technical Context
The 93LC76B-E/SN implements a synchronous serial Microwire interface with CS, CLK, DI, and DO signals - no ORG or PE pins present. It executes READ, WRITE, ERASE, ERAL, EWEN, and EWDS instructions using 14- or 22-clock-cycle protocols depending on operation, with DO providing Ready/Busy status during programming.
Its memory array is organized as 512 words × 16 bits, supporting single-word and all-word operations (WRAL/ERAL). Power-on data protection activates below 2.5V, and write enable must be explicitly issued (EWEN) before any erase/write, with automatic disable (EWDS) recommended post-write to prevent accidental modification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (512 × 16-bit words) - fixed word width eliminates external ORG logic and simplifies address decoding in 16-bit microcontroller interfaces. |
| VCC Range | 2.5V to 5.5V - supports direct connection to 3.3V or 5V automotive power rails without level-shifting. |
| Temperature Grade | Automotive (–40°C to +125°C) - qualified for under-hood and safety-critical ECUs per AEC-Q100 stress test requirements. |
| Endurance | 1,000,000 erase/write cycles - enables reliable logging of diagnostic trouble codes (DTCs) over full vehicle lifetime. |
| Data Retention | >200 years at +25°C - ensures calibration data integrity across multiple vehicle ownership cycles without refresh. |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - interoperable with legacy PIC® MCU peripherals and discrete shift-register-based controllers. |
| Write Cycle Time | 5 ms typical (TWC) - deterministic timing allows precise host software timeout handling without polling overhead. |
Pinout & Package
8-pin SOIC package (SN suffix), Pb-free Matte Tin finish, 150-mil body width. Pin 1 marked by laser dot; pin 1 ID corner located at top-left when notch faces up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-high enable: must be held low ≥250 ns between commands; deselects device into ultra-low standby current (≤5 µA). |
| 2 (CLK) | Serial Clock | Synchronizes all data transfers on rising edge; clock may pause mid-sequence without corrupting state. |
| 3 (DI) | Data Input | Accepts Start bit, opcodes, addresses, and write data; high-impedance when not selected. |
| 4 (DO) | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge - enables shared bus topology. |
| 5 (VSS) | Ground | Reference return path for all I/O and internal circuitry; requires low-inductance connection to minimize noise coupling. |
| 6–7 | Not Connected | No internal connection - left unconnected per Microchip design; no pull-up/down required. |
| 8 (VCC) | Power Supply | Supplies core and I/O circuitry; bypass capacitor (0.1 µF ceramic) mandatory within 5 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed Erase/Write | Eliminates need for external timing control or busy-wait loops - host initiates command and polls DO for completion. |
| Automatic ERAL before WRAL | Ensures full-array write reliability without separate erase step - reduces firmware complexity and flash wear leveling overhead. |
| Power-On/Off Data Protection | Hardware lockout below 2.5V prevents partial writes during brown-out or hot-swap events - critical for automotive power sequencing. |
| Industry Standard 3-Wire Serial I/O | Reduces PCB trace count vs. SPI/I²C; compatible with existing Microwire firmware stacks and debug tools. |
| Device Status Signal (Ready/Busy) | DO pin doubles as status indicator - enables real-time progress monitoring without additional GPIO or interrupt lines. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance System (ADAS) |
|---|---|
Use Scenario: Storing fuel trim tables, knock sensor calibration offsets, and adaptive learning parameters that persist across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration register bank accessed during boot and runtime re-calibration sequences. Use Value: Enables closed-loop engine optimization without battery-backed SRAM, reducing BOM cost and eliminating supercapacitor aging concerns. | Use Scenario: Retaining camera lens distortion coefficients, radar beamforming profiles, and sensor fusion weighting factors after vehicle shutdown. IC Role / Device Role / Timing Role: Persistent parameter store queried during sensor initialization and updated during field calibration sessions. Use Value: Maintains ADAS accuracy across thermal cycles and vehicle lifetimes without requiring factory recalibration. |
| Automotive Infotainment | Body Control Module (BCM) |
Use Scenario: Saving user preferences (volume, equalizer settings, radio presets) and Bluetooth pairing keys across power loss. IC Role / Device Role / Timing Role: Low-power serial configuration memory interfaced directly to audio SoC or MCU with Microwire peripheral. Use Value: Delivers instant-on UX with zero boot delay for settings recall, meeting OEM human-machine interface (HMI) responsiveness targets. | Use Scenario: Storing door lock actuator timing profiles, window auto-reverse thresholds, and lighting fade curves. IC Role / Device Role / Timing Role: Field-programmable configuration storage updated during dealer programming or OTA updates. Use Value: Supports regional customization and regulatory compliance (e.g., EU pedestrian alert timing) without hardware variants. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC76B-I/SN | Industrial temperature grade (–40°C to +85°C); identical electrical specs and pinout. | Not qualified for under-hood or safety-critical locations requiring AEC-Q100 automotive qualification. | Select only for cabin-only modules where ambient temperature remains ≤85°C. |
| AT25DF041A-SSH-T | 4 Mbit SPI NOR Flash with sector protection; requires different command set and lacks Ready/Busy pin. | Higher density but slower random access; no native Microwire compatibility - necessitates firmware rewrite and layout change. | Consider only when migrating to SPI-based architecture and needing >8 Kbit capacity. |
Compared with 93LC76B-I/SN, the 93LC76B-E/SN provides guaranteed operation at +125°C for engine bay deployment, while AT25DF041A-SSH-T offers higher density at the cost of interface incompatibility and loss of deterministic write timing.
Availability
93LC76B-E/SN is available at Aetrix Electronics and suitable for automotive ECU development, ADAS sensor calibration, and infotainment system production requiring stable component supply with long-term lifecycle assurance.
Supply support for 93LC76B-E/SN 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, serving automotive, industrial, and consumer markets with high-reliability silicon and development tools.
The 93LC76B-E/SN belongs to Microchip's legacy 93XX serial EEPROM family, designed specifically for cost-sensitive, low-pin-count nonvolatile storage in resource-constrained embedded systems with Microwire-compatible controllers.
FAQ
What is the memory organization of the 93LC76B-E/SN?
The 93LC76B-E/SN has a fixed 512 × 16-bit (8 Kbit) organization. Unlike 'C' variants, it does not include an ORG pin - word size is permanently configured for 16-bit access. This eliminates external configuration logic and simplifies integration with 16-bit data buses or microcontrollers supporting native 16-bit EEPROM addressing.
Does the 93LC76B-E/SN require an external write-enable signal?
No. The 93LC76B-E/SN does not have a Program Enable (PE) pin and does not require external write-enable signaling. Write operations are enabled via the EWEN instruction and disabled via EWDS - both executed over the serial interface. This eliminates the need for additional GPIO control lines and simplifies PCB routing.
How is Ready/Busy status monitored on the 93LC76B-E/SN?
Ready/Busy status is monitored on the DO pin: DO = low indicates ongoing erase/write operation; DO = high indicates completion. To read status, CS must be brought high for ≥250 ns after TCSL, then the host clocks CLK to sample DO. The 93LC76B-E/SN does not provide dedicated status pins - DO serves dual function.
What is the maximum clock frequency supported by the 93LC76B-E/SN?
The 93LC76B-E/SN supports up to 3 MHz clock frequency when VCC ≥ 4.5V, 2 MHz at 2.5V ≤ VCC < 4.5V, and 1 MHz at 1.8V ≤ VCC < 2.5V. Since the 93LC76B-E/SN operates from 2.5V to 5.5V, its practical max clock is 3 MHz (at 4.5–5.5V) or 2 MHz (at 2.5–4.5V), enabling fast configuration loading in automotive boot sequences.
Is the 93LC76B-E/SN RoHS compliant and lead-free?
Yes. The 93LC76B-E/SN is Pb-free and RoHS compliant, with a Matte Tin (Sn) finish on its 8-pin SOIC (SN) package. This meets global environmental regulations including EU RoHS Directive 2011/65/EU and China RoHS, and supports lead-free reflow soldering profiles (J-STD-020).
93LC76B-E/SN 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:
- 8Kbit
- Memory Organization:
- 512 x 16
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
93LC76B-E/SN FAQ
1.How can I place an order for 93LC76B-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC76B-E/SN 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 93LC76B-E/SN reliable?
The price and inventory of 93LC76B-E/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC76B-E/SN is usually 5 days.
3.What payment methods are accepted for 93LC76B-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC76B-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC76B-E/SN?
93LC76B-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC76B-E/SN 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 93LC76B-E/SN?
For technical support, including 93LC76B-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC76B-E/SN requirements.
6.How does Aetrix verify that 93LC76B-E/SN is sourced from the original manufacturer or authorized distributors?
All 93LC76B-E/SN 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 93LC76B-E/SN meets industry standards.
7.What is the process for return or replacement of 93LC76B-E/SN?
All 93LC76B-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93LC76B-E/SN, 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 93LC76B-E/SN part is unused and in its original packaging.
Return procedure for 93LC76B-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93LC76B-E/SN Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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