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Microchip Technology 93C76C-E/SN
- Part No.:
- 93C76C-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93C76C-E/SN.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,688
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Product details
Overview
93C76C-E/SN from Microchip Technology Inc. is an 8Kbit, 4.5–5.5V serial EEPROM with Microwire-compatible 3-wire interface, ORG-selectable 8-/16-bit word organization, and Program Enable (PE) pin for full-array write protection. It delivers 1 million erase/write cycles, >200-year data retention, and industrial/automotive temperature operation (–40°C to +125°C), used in automotive body control modules for calibration storage.
For engineers reviewing the 93C76C-E/SN datasheet, 93C76C-E/SN pinout, 93C76C-E/SN application, or 93C76C-E/SN equivalent, key selection criteria include VCC range compatibility (4.5–5.5V), PE-driven write-protection enforcement, ORG-configurable memory mapping, and automotive-grade reliability under thermal cycling and voltage transients.
Technical Context
The 93C76C-E/SN implements a synchronous Microwire-compatible serial interface with CS/CLK/DI/DO signaling and two dedicated control pins: ORG sets x8 (low) or x16 (high) memory organization, while PE must be logic-high to enable erase/write operations. All programming requires prior EWEN command execution.
It features self-timed erase/write cycles (2 ms typical), automatic ERAL before WRAL, Ready/Busy status polling via DO pin, and power-on/off data protection triggered at VCC < 3.8V. The device supports sequential read and uses rising-edge clocking for all instruction, address, and data transfers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (1024 × 8 or 512 × 16, selected by ORG pin) |
| VCC operating range | 4.5 V to 5.5 V - ensures compatibility with 5V automotive microcontroller I/O domains |
| Endurance | 1,000,000 erase/write cycles - supports frequent firmware parameter updates in telematics units |
| Data retention | 200+ years at 25°C - guarantees long-term calibration stability without refresh |
| Max clock frequency | 3 MHz at VCC ≥ 4.5 V - enables fast configuration loading during boot-up sequences |
| Write cycle time | 2 ms (TWC) - defines minimum interval between successive write commands |
| Temperature grade | Automotive (–40°C to +125°C) - qualified for engine bay and ADAS ECU mounting locations |
Pinout & Package
93C76C-E/SN is packaged in an 8-lead SOIC (SN) with Pb-free Matte Tin finish, footprint compatible with industry-standard 150-mil SOIC-8 layouts. Pin 1 is marked by laser dot; package meets JEDEC MS-012AA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must remain low ≥250 ns between instructions to reset internal state |
| CLK | Serial Clock | Rising-edge synchronized timing for opcode/address/data; stoppable mid-transfer |
| DI | Data Input | Accepts Start bit, opcodes (e.g., 01 for WRITE), addresses, and data bits |
| DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge |
| VSS | Ground | Reference return path for all digital and analog functions |
| ORG | Organization select | High = 512 × 16-bit; Low = 1024 × 8-bit - must be hardwired, not floated |
| PE | Program Enable | High = write enabled; Low = full-array write protection - mandatory for safe field updates |
| VCC | Power supply | 4.5–5.5 V input; internal POR triggers at ~3.8 V to block writes during brownout |
Key Features
| Feature | Design Value |
|---|---|
| ORG-selectable word size | Enables single hardware design to support either byte- or word-oriented firmware architectures |
| Program Enable (PE) pin | Hardware-level write lockout prevents accidental corruption during power transitions or noise events |
| Self-timed ERAL and WRAL | Eliminates need for external timing circuitry or software delay loops in safety-critical systems |
| Ready/Busy polling via DO | Allows deterministic synchronization of host MCU without fixed timeout delays |
| Power-on/off data protection | Blocks all write operations when VCC drops below 3.8 V, preventing partial writes during undervoltage |
Applications
| Automotive Body Control Module | Industrial PLC Configuration Storage |
|---|---|
Use Scenario: Storing seat position presets, mirror angles, and lighting profiles across vehicle ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile parameter store interfaced to 8-bit MCU via Microwire; accessed during initialization and runtime updates. Use Value: ORG pin allows reuse of same PCB layout for both 8-bit legacy MCUs (x8 mode) and newer 16-bit controllers (x16 mode). | Use Scenario: Retaining I/O mapping, PID tuning constants, and alarm thresholds after factory power-down. IC Role / Device Role / Timing Role: Serial EEPROM providing robust, low-pin-count configuration memory for DIN-rail mounted controllers. Use Value: PE pin enables hardware-enforced write protection during normal operation, reducing firmware complexity for secure parameter updates. |
| Medical Infusion Pump Calibration | Smart Energy Meter Firmware Patch Storage |
Use Scenario: Holding flow-rate calibration coefficients and sensor offset values validated during production test. IC Role / Device Role / Timing Role: Safety-critical nonvolatile memory storing traceable calibration data accessible only during service mode. Use Value: 200+ year data retention ensures calibration integrity over product lifetime without periodic revalidation. | Use Scenario: Storing field-deployed firmware patches that survive meter power loss during grid outages. IC Role / Device Role / Timing Role: Secure update storage with hardware write lock (PE) and auto-erase-before-write (ERAL) ensuring atomic patch application. Use Value: 1M endurance supports daily patch deployments over 27 years - exceeding utility infrastructure upgrade cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC76C-E/SN | VCC range 2.5–5.5 V; lacks VCC brownout threshold at 3.8 V; same pinout and ORG/PE functionality | Suitable for mixed-voltage systems (e.g., 3.3V logic with 5V peripherals); not rated for 4.5–5.5V-only environments | Select when system operates below 4.5 V or requires wider supply tolerance; verify POR behavior matches host MCU sequencing. |
| AT25DF041A-SHN-T | 4 Mbit SPI NOR Flash; no ORG/PE pins; sector erase only; 100k endurance; different command set and timing | Used where code shadowing or larger firmware storage is needed; incompatible with Microwire protocol | Choose only if migrating from EEPROM to flash-based architecture; requires full interface and firmware redesign. |
Compared with 93LC76C-E/SN, the 93C76C-E/SN provides tighter VCC regulation for 5V-centric automotive designs and higher inherent write-protection assurance via its 3.8V POR threshold; versus AT25DF041A-SHN-T, it offers pin- and protocol-compatible drop-in replacement for existing Microwire EEPROM implementations with superior endurance and simpler command structure.
Availability
93C76C-E/SN is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and medical device manufacturing requiring stable component supply across extended lifecycle programs.
Supply support for 93C76C-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 devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93C76C-E/SN belongs to Microchip's legacy 93XX serial EEPROM family, designed specifically for cost-sensitive, high-reliability applications demanding simple 3-wire communication, hardware write protection, and extended temperature operation.
FAQ
What is the function of the ORG pin on the 93C76C-E/SN?
The ORG pin on the 93C76C-E/SN selects memory organization: tied to VCC for 512 × 16-bit mode, or to VSS for 1024 × 8-bit mode. This pin must be hardwired - floating is prohibited. The 93C76C-E/SN uses this pin to configure word size at power-up, enabling one hardware design to serve multiple MCU data-bus widths without changing the 93C76C-E/SN part number.
How does the Program Enable (PE) pin protect memory on the 93C76C-E/SN?
The PE pin on the 93C76C-E/SN acts as a hardware gate for all erase and write operations: only when PE is logic-high can EWEN, ERASE, or WRITE commands execute. If PE is held low, the 93C76C-E/SN ignores all programming instructions - even if EWEN is issued - providing fail-safe protection against spurious writes during power-up, ESD events, or firmware errors.
What is the minimum VCC required for reliable operation of the 93C76C-E/SN?
The 93C76C-E/SN requires VCC ≥ 4.5 V for guaranteed operation, with a power-on reset threshold of 3.8 V. Below 4.5 V, the device may power up but will inhibit all write operations and enter undefined behavior per datasheet specification. This 4.5–5.5 V range ensures compatibility with 5V automotive power domains and eliminates marginal operation near 5V rail droop.
Can the 93C76C-E/SN be used in place of the 93C76A-E/SN?
No - the 93C76C-E/SN is not a direct replacement for the 93C76A-E/SN. While both share the same 8Kbit capacity and SOIC-8 package, the 93C76A-E/SN lacks ORG and PE pins and is fixed at 8-bit organization with always-enabled writes. Substituting 93C76C-E/SN requires adding external pull-up/down resistors for ORG/PE and modifying firmware to manage write-enable sequencing, making it a board-level redesign rather than a drop-in swap.
What is the maximum clock frequency supported by the 93C76C-E/SN at 5.0 V VCC?
At VCC = 5.0 V (within the 4.5–5.5 V range), the 93C76C-E/SN supports a maximum clock frequency of 3 MHz, as specified in Table 1-2 (A1 parameter). This allows high-speed configuration reads during system boot while maintaining timing margins for signal integrity on longer PCB traces in automotive harness interfaces.
93C76C-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:
- 1K x 8, 512 x 16
- Memory Interface:
- Microwire
- Clock Frequency:
- 3 MHz
- Write Cycle Time - Word, Page:
- 2ms
- Access Time:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
93C76C-E/SN FAQ
1.How can I place an order for 93C76C-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C76C-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 93C76C-E/SN reliable?
The price and inventory of 93C76C-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 93C76C-E/SN is usually 5 days.
3.What payment methods are accepted for 93C76C-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C76C-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C76C-E/SN?
93C76C-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C76C-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 93C76C-E/SN?
For technical support, including 93C76C-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C76C-E/SN requirements.
6.How does Aetrix verify that 93C76C-E/SN is sourced from the original manufacturer or authorized distributors?
All 93C76C-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 93C76C-E/SN meets industry standards.
7.What is the process for return or replacement of 93C76C-E/SN?
All 93C76C-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93C76C-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 93C76C-E/SN part is unused and in its original packaging.
Return procedure for 93C76C-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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