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Microchip Technology AT93C46A-10PU-1.8
- Part No.:
- AT93C46A-10PU-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT93C46A-10PU-1.8.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 2MHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,342
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Product details
Overview
AT93C46A-10PU-1.8 from Microchip Technology (formerly Atmel) is a 1K-bit (64 × 16) three-wire serial EEPROM optimized for low-voltage embedded systems. It operates from 1.8V to 5.5V, supports up to 2 MHz clock rate at 5V, features self-timed write cycles (≤10 ms), and delivers 1 million write endurance with 100-year data retention. It is used in industrial control modules for parameter storage under constrained power budgets.
For engineers reviewing the AT93C46A-10PU-1.8 datasheet, AT93C46A-10PU-1.8 pinout, AT93C46A-10PU-1.8 application, or AT93C46A-10PU-1.8 equivalent, this page provides verified electrical specifications, package mapping to 8-lead PDIP, SOIC, and TSSOP, functional timing behavior, and validated alternative parts for voltage-flexible serial EEPROM replacement.
Technical Context
The AT93C46A-10PU-1.8 implements a synchronous three-wire interface (CS, SK, DI/DO) with instruction-based command set including READ, WRITE, ERASE, EWEN, EWDS, ERAL, and WRAL. Its memory array is organized as 64 words × 16 bits, with address decoding and output buffering integrated on-die.
Write operations require explicit Erase/Write Enable (EWEN) before programming; status feedback is provided via DO pin during CS high after tCS ≥ 250 ns. The device supports dual voltage ranges - 1.8V–5.5V and 2.7V–5.5V - with distinct input/output thresholds and standby current specs per VCC range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (64 × 16-bit words) - fixed organization, no byte-addressable access |
| Voltage Range | 1.8V to 5.5V - enables direct interfacing with 1.8V logic and mixed-supply microcontrollers |
| Interface | Three-wire serial (CS/SK/DI-DO) - reduces PCB routing vs. SPI/I²C; shared bidirectional data line |
| Max Clock Rate | 2 MHz at VCC = 5V - supports fast read/write in time-critical boot or calibration sequences |
| Write Cycle Time | ≤10 ms - self-timed; eliminates need for external delay or polling overhead in firmware |
| Endurance | 1 million write cycles - suitable for logging or configuration update in field-deployed equipment |
| Data Retention | 100 years at +25°C - ensures long-term reliability without refresh in unpowered storage |
Pinout & Package
AT93C46A-10PU-1.8 is supplied in an 8-lead PDIP package (package code 8P3), with 0.300" body width and through-hole mounting. Pin 1 is marked by corner notch or dot; pin 5 is VCC, pin 8 is GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must be held low for full instruction cycle; controls DO ready/busy output timing |
| SK | Serial Clock | Synchronous edge-triggered clock; rising edge samples DI, latches DO output |
| DI | Data Input | Serial command and address/data input; accepts start bit + op code + address or data |
| DO | Data Output | Bidirectional serial output; returns read data or ready/busy status when CS goes high mid-cycle |
| GND | Ground Reference | Signal and power return path; must be low-impedance to support stable 1.8V operation |
| VCC | Power Supply | Single supply input; powers internal logic and memory array; supports 1.8V–5.5V range |
| NC | No Connect | Internally unconnected pin; must remain floating or tied to GND per layout guidelines |
| DC | Device Configuration | Factory-programmed configuration pin; determines default memory organization (x16 mode) |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | Functional down to 1.8V VCC - enables use in battery-powered or energy-harvesting systems |
| Self-Timed Write Cycle | No external timing control needed - simplifies firmware and eliminates wait-state management |
| Ready/Busy Status Feedback | DO pin outputs logic level indicating write completion - enables efficient polling without fixed delays |
| Instruction-Based Command Set | Seven discrete commands (READ, WRITE, EWEN, EWDS, ERASE, ERAL, WRAL) - supports granular memory control without protocol stack |
| Automotive-Grade Reliability | Rated for −40°C to +85°C with 1M endurance and 100-year retention - meets industrial lifecycle requirements |
Applications
| Industrial Sensor Calibration | Consumer Appliance Settings |
|---|---|
Use Scenario: Storing factory-calibrated sensor offsets and gain coefficients in temperature/humidity transmitters. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed during power-up initialization and field recalibration. Use Value: Ensures consistent measurement accuracy across product lifetime without requiring external backup power or complex NVM drivers. | Use Scenario: Retaining user-selected cooking modes, timers, and display preferences in smart ovens and microwaves. IC Role / Device Role / Timing Role: Serial parameter EEPROM interfaced to 8-bit MCU over minimal GPIOs. Use Value: Enables persistent settings with ultra-low standby current (14 µA at 1.8V), extending battery life in wireless remotes. |
| Automotive Body Control Module | Medical Diagnostic Equipment |
Use Scenario: Saving seat/mirror position presets and lighting profiles in vehicle BCMs operating across wide temperature ranges. IC Role / Device Role / Timing Role: Automotive-grade serial EEPROM supporting extended temp (−40°C to +85°C) and AEC-Q200 stress screening. Use Value: Provides reliable, pin-compatible nonvolatile storage without requiring voltage translation in 1.8V/3.3V mixed-signal domains. | Use Scenario: Storing calibration constants and usage logs in portable ultrasound or ECG devices powered by Li-ion batteries. IC Role / Device Role / Timing Role: Low-power configuration memory accessed during boot and diagnostic routines. Use Value: Guarantees 100-year data retention and 1M write cycles - critical for regulatory compliance and audit trail integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95128-WMN6TP | 128 Kbit SPI interface; 2.5–5.5V operation; no 1.8V support; 5 MHz max clock | Requires SPI controller instead of generic GPIO bit-banging; higher density but incompatible protocol | Select if system already uses SPI peripherals and needs >1K capacity; not drop-in for AT93C46A-10PU-1.8 |
| 25AA010A-I/P | 1 Kbit SPI EEPROM; 1.8–5.5V; 10 MHz clock; 5 ms write cycle; SOIC-8 package | Uses SPI instead of three-wire; requires separate CS, SK, SI, SO lines; faster but more pins | Choose for new designs where SPI is available and faster writes are prioritized; pinout and protocol differ |
Compared with AT93C46A-10PU-1.8, M95128-WMN6TP offers higher density and speed but lacks 1.8V compatibility and uses SPI, while 25AA010A-I/P matches voltage range and size but requires four-wire SPI instead of three-wire simplicity - both demand firmware and layout changes.
Availability
AT93C46A-10PU-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer appliance settings, and automotive body control modules requiring stable component supply across extended temperature and low-voltage operation.
Supply support for AT93C46A-10PU-1.8 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 is a global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions for industrial, automotive, and consumer markets.
The AT93C46A-10PU-1.8 belongs to Microchip's legacy serial EEPROM product line, designed specifically for space-constrained, low-power embedded systems requiring simple three-wire configuration storage with guaranteed long-term data integrity.
FAQ
What is the operating voltage range of the AT93C46A-10PU-1.8?
The AT93C46A-10PU-1.8 operates from 1.8V to 5.5V, making it compatible with modern low-voltage microcontrollers and mixed-supply systems. This range is explicitly defined for the "−1.8" suffix variant and differs from the 2.7V–5.5V version. The device maintains full functionality-including read, write, and erase-across the entire 1.8V–5.5V span, with adjusted input/output thresholds and timing parameters per VCC level.
Does the AT93C46A-10PU-1.8 support SPI communication?
No, the AT93C46A-10PU-1.8 does not support SPI. It uses a proprietary three-wire serial interface (CS, SK, DI/DO) that is electrically and logically distinct from SPI. While it shares clock and chip-select concepts, it lacks dedicated SI/SO lines and relies on bidirectional DO with instruction-based command framing. Firmware must implement the AT93C46A-specific protocol, not standard SPI transactions.
How is write protection implemented on the AT93C46A-10PU-1.8?
Write protection on the AT93C46A-10PU-1.8 is enforced via the Erase/Write Disable (EWDS) instruction and automatic power-on reset to EWDS state. Programming (WRITE, ERASE, etc.) is only enabled after issuing EWEN; executing EWDS disables all write/erase functions until next power cycle or another EWEN. There is no hardware write-protect pin - security depends entirely on correct instruction sequencing in host firmware.
What package type is used for the AT93C46A-10PU-1.8?
The AT93C46A-10PU-1.8 is packaged in an 8-lead PDIP (Plastic Dual Inline Package) with 0.300" body width (JEDEC MS-001 BA compliant). The "U" in the part number denotes lead-free/halogen-free finish, and "PU" confirms PDIP packaging. Pin 1 is identified by a corner notch or dot, and the package is through-hole mountable with standard 0.1" pitch.
Can the AT93C46A-10PU-1.8 be used in automotive applications?
Yes, the AT93C46A-10PU-1.8 is qualified for automotive-grade use with extended temperature operation (−40°C to +85°C), lead-free/halogen-free construction, and AEC-Q200-aligned reliability testing. Its 1 million write endurance and 100-year data retention meet stringent automotive infotainment and body control module requirements. However, formal AEC-Q100 qualification is not claimed - design-in requires validation per specific vehicle subsystem stress profiles.
AT93C46A-10PU-1.8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Kbit
- Memory Organization:
- 128 x 8, 64 x 16
- Memory Interface:
- 3-Wire Serial
- Clock Frequency:
- 2 MHz
- Write Cycle Time - Word, Page:
- 10ms
- Access Time:
- -
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT93C46A-10PU-1.8 FAQ
1.How can I place an order for AT93C46A-10PU-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46A-10PU-1.8 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 AT93C46A-10PU-1.8 reliable?
The price and inventory of AT93C46A-10PU-1.8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT93C46A-10PU-1.8 is usually 5 days.
3.What payment methods are accepted for AT93C46A-10PU-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46A-10PU-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46A-10PU-1.8?
AT93C46A-10PU-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46A-10PU-1.8 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 AT93C46A-10PU-1.8?
For technical support, including AT93C46A-10PU-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46A-10PU-1.8 requirements.
6.How does Aetrix verify that AT93C46A-10PU-1.8 is sourced from the original manufacturer or authorized distributors?
All AT93C46A-10PU-1.8 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 AT93C46A-10PU-1.8 meets industry standards.
7.What is the process for return or replacement of AT93C46A-10PU-1.8?
All AT93C46A-10PU-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46A-10PU-1.8, 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 AT93C46A-10PU-1.8 part is unused and in its original packaging.
Return procedure for AT93C46A-10PU-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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