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Microchip Technology 93LC76A-E/SN
- Part No.:
- 93LC76A-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC76A-E/SN.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,540
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Product details
Overview
93LC76A-E/SN from Microchip Technology Inc. is an 8Kbit, 1024 × 8-bit organization serial EEPROM with Microwire-compatible 3-wire interface (CS/CLK/DI/DO), operating over 2.5–5.5V supply and rated for automotive temperature range (−40°C to +125°C). It features self-timed erase/write cycles, 1 million endurance cycles, >200-year data retention, and power-on/off data protection - used in automotive body control modules for storing calibration data and configuration settings.
For engineers reviewing the 93LC76A-E/SN datasheet, 93LC76A-E/SN pinout, 93LC76A-E/SN application, or 93LC76A-E/SN equivalent, key selection considerations include its automotive-grade temperature support, dedicated 8-bit organization (no ORG pin), absence of PE/ORG pins, and compatibility with legacy Microwire host controllers requiring minimal firmware changes.
Technical Context
This device implements a synchronous serial interface compliant with Microwire protocol, using CS-active-high enable, rising-edge clocked data transfer, and DO-driven Ready/Busy status polling during erase/write operations. Its internal architecture includes an address counter, mode decode logic, and output buffer enabling sequential read without reissuing addresses.
It supports READ, WRITE, ERASE, ERAL, EWEN, and EWDS instructions with fixed 22-clock-cycle timing for 8-bit operations. Power-up default is EWDS mode, requiring explicit EWEN before programming; no external write-protection logic is needed as the 'A' variant lacks PE/ORG pins and relies solely on command-level protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (1024 × 8-bit) - fixed x8 organization, no ORG pin required |
| Supply voltage | 2.5 V to 5.5 V - supports wide-range automotive power rails including 3.3 V and 5 V systems |
| Temperature grade | Automotive (E): −40°C to +125°C - qualified per AEC-Q100 for under-hood applications |
| Endurance | 1,000,000 erase/write cycles - enables frequent recalibration logging in ECUs |
| Data retention | >200 years at +125°C - ensures long-term reliability across vehicle lifetime |
| Interface speed | Up to 3 MHz clock frequency at VCC ≥4.5 V - sufficient for fast parameter updates without CPU overhead |
| Write time | 5 ms typical program cycle (TWC) - deterministic timing for real-time system scheduling |
Pinout & Package
8-lead SOIC package (SN suffix), Pb-free Matte Tin finish, 150-mil body width, standard JEDEC MS-012AC footprint. Pin 1 marked by laser dot; pin 1 is CS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; controls Standby entry/exit |
| CLK | Serial Clock | Rising-edge synchronized I/O; clocking stops during self-timed erase/write; no CLK required post-initiation |
| DI | Data Input | Accepts Start bit, opcode, address, and data; high-impedance when CS low |
| DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge |
| VSS | Ground | Reference return path; must be low-impedance for stable timing and noise immunity |
| VCC | Power Supply | 2.5–5.5 V input; internal POR triggers at ~1.5 V; powers all logic and memory array |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control or software delays - simplifies driver implementation |
| Power-on/off data protection | Hardware-enforced write inhibition below ~1.5 V VCC - prevents corruption during brown-out or startup |
| Ready/Busy status via DO | Enables non-blocking polling instead of fixed delay loops - improves CPU efficiency in real-time systems |
| Sequential read function | Auto-incrementing address counter allows continuous multi-byte reads with single CS assertion - reduces bus overhead |
| Pb-free and RoHS compliant | Meets automotive environmental compliance requirements (e.g., ELV, IMDS) without leaded solder concerns |
Applications
| Body Control Module (BCM) | Engine Control Unit (ECU) |
|---|---|
Use Scenario: Storing seat position presets, mirror angles, and lighting profiles across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with infrequent writes and long-term retention. Use Value: Enables personalized user settings without battery backup; survives 15+ year vehicle service life. | Use Scenario: Logging engine runtime parameters (e.g., oil life, DPF regeneration count) for maintenance alerts. IC Role / Device Role / Timing Role: Low-power, high-endurance data logger interfaced to MCU via Microwire. Use Value: Supports >1M write cycles - exceeds typical vehicle lifetime usage; operates reliably at 125°C near exhaust manifolds. |
| Advanced Driver Assistance Systems (ADAS) | Instrument Cluster |
Use Scenario: Saving camera calibration offsets and sensor fusion coefficients after factory alignment. IC Role / Device Role / Timing Role: One-time or rare-write configuration storage with AEC-Q100 qualification. Use Value: Ensures functional safety compliance; retains critical calibration data through thermal cycling and vibration. | Use Scenario: Storing odometer value, service interval counters, and display brightness preferences. IC Role / Device Role / Timing Role: Automotive-grade EEPROM accessed during boot and periodic updates. Use Value: Guarantees data integrity across cold starts and battery disconnects; meets OEM EEPROM longevity specs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC76B-E/SN | 16-bit organization (512 × 16), same voltage/temp specs - requires host software adaptation for word-width | Suitable where wider data paths reduce transaction count but demand compatible addressing logic | Select only if system uses 16-bit data transfers and can accommodate different instruction timing (22 vs. 22 cycles, same structure) |
| AT25DF041A-SHN-T | SPI interface (4-wire), 4 Mbit density, sector protection, faster 20 MHz clock - not Microwire-compatible | Used in designs migrating to SPI-based memory subsystems with higher throughput needs | Choose when upgrading interface architecture; requires full driver rewrite and layout change due to different pinout and protocol |
Compared with 93LC76B-E/SN, the 93LC76A-E/SN offers simpler 8-bit data handling and identical automotive qualification; compared with AT25DF041A-SHN-T, it provides drop-in Microwire compatibility and lower power consumption but less density and no hardware write protection sectors.
Availability
93LC76A-E/SN is available at Aetrix Electronics and suitable for automotive electronics, engine management systems, and instrument cluster designs requiring stable component supply with AEC-Q100-compliant nonvolatile memory.
Supply support for 93LC76A-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.
The 93LCxx family was designed specifically for cost-sensitive, low-power serial EEPROM applications in automotive and industrial control systems where Microwire compatibility, extended temperature operation, and long data retention are essential.
FAQ
What is the memory organization of the 93LC76A-E/SN?
The 93LC76A-E/SN has a fixed 1024 × 8-bit (8 Kbit) organization. Unlike 'C' variants, it does not feature an ORG pin - the 8-bit word size is hardwired. This eliminates external configuration logic and simplifies PCB layout and firmware design for systems requiring byte-oriented access.
Does the 93LC76A-E/SN include a Program Enable (PE) pin?
No, the 93LC76A-E/SN does not include a PE pin. The PE pin is exclusive to 'C' variants (e.g., 93LC76C). On the 93LC76A-E/SN, write protection is implemented exclusively via the EWEN/EWDS command sequence - no external hardware enable is required or supported.
What is the maximum clock frequency supported by the 93LC76A-E/SN at 3.3 V?
At VCC = 3.3 V (within 2.5–4.5 V range), the 93LC76A-E/SN supports a maximum clock frequency of 2 MHz. This is specified in Table 1-2 (A1), with corresponding timing constraints for TCKH (250 ns min), TCKL (200 ns min), and other AC parameters ensuring reliable communication.
How is data protection handled during power transitions in the 93LC76A-E/SN?
The 93LC76A-E/SN incorporates hardware-based power-on/power-off data protection: internal circuitry inhibits all write operations when VCC falls below ~1.5 V. This prevents partial writes and memory corruption during brown-out conditions or uncontrolled power-down sequences - critical for automotive ECU reliability.
Is the 93LC76A-E/SN pin-compatible with other members of the 93XX76 family?
The 93LC76A-E/SN shares the same 8-pin SOIC (SN) package and pinout with 93LC76B-E/SN and 93LC76C-E/SN. However, pin compatibility does not imply functional equivalence: 'B' variants use 16-bit addressing, and 'C' variants add ORG/PE pins. Only 'A' variants match exactly in pin function and command set.
93LC76A-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:
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
93LC76A-E/SN FAQ
1.How can I place an order for 93LC76A-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC76A-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 93LC76A-E/SN reliable?
The price and inventory of 93LC76A-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 93LC76A-E/SN is usually 5 days.
3.What payment methods are accepted for 93LC76A-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC76A-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC76A-E/SN?
93LC76A-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC76A-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 93LC76A-E/SN?
For technical support, including 93LC76A-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC76A-E/SN requirements.
6.How does Aetrix verify that 93LC76A-E/SN is sourced from the original manufacturer or authorized distributors?
All 93LC76A-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 93LC76A-E/SN meets industry standards.
7.What is the process for return or replacement of 93LC76A-E/SN?
All 93LC76A-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93LC76A-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 93LC76A-E/SN part is unused and in its original packaging.
Return procedure for 93LC76A-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93LC76A-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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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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