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Microchip Technology AT93C46A-10PU-2.7
- Part No.:
- AT93C46A-10PU-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT93C46A-10PU-2.7.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 2MHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,418
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Product details
Overview
AT93C46A-10PU-2.7 from Microchip Technology (formerly Atmel) is a 1K-bit, 64-word × 16-bit serial EEPROM with three-wire interface, operating from 2.7V to 5.5V, supporting up to 2 MHz clock rate at 5V, and delivering 1 million write cycles with 100-year data retention. It is used in industrial control systems for storing calibration data, configuration registers, and firmware boot parameters.
For engineers reviewing the AT93C46A-10PU-2.7 datasheet, AT93C46A-10PU-2.7 pinout, AT93C46A-10PU-2.7 application, or AT93C46A-10PU-2.7 equivalent, this page provides verified package mapping (8-lead PDIP), validated pin functions (CS/SK/DI/DO/GND/VCC), confirmed low-voltage operation (2.7–5.5 V), self-timed write cycle (≤10 ms), and automotive-grade temperature range (−40°C to +85°C).
Technical Context
The AT93C46A-10PU-2.7 implements a synchronous three-wire serial interface with Chip Select (CS), Serial Clock (SK), and bidirectional Data I/O (DI/DO). Its instruction set includes READ, WRITE, ERASE, EWEN/EWDS, ERAL, and WRAL - all initiated by a start bit followed by op code and address.
It features on-chip address decoding, output buffering, and clock generation logic. The DO pin provides ready/busy status during write/erase operations when CS is asserted after tCS ≥ 250 ns, and supports dummy-bit-prefixed 16-bit read output synchronized to SK rising edges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (64 words × 16 bits) - sufficient for small configuration tables or device ID storage |
| Supply Voltage Range | 2.7V to 5.5V - enables direct interfacing with 3.3V and 5V microcontrollers without level shifting |
| Max Clock Frequency | 2 MHz at VCC = 5V - supports fast read/write in time-critical embedded boot sequences |
| Write Cycle Time | ≤10 ms (self-timed) - eliminates need for external timing control or polling delay estimation |
| Endurance | 1 million write cycles - suitable for field-updatable calibration or logging applications |
| Data Retention | 100 years at +25°C - ensures long-term reliability in unattended industrial deployments |
| Operating Temperature | −40°C to +85°C - qualified for industrial and automotive under-hood environments |
Pinout & Package
AT93C46A-10PU-2.7 is supplied in an 8-lead PDIP (Plastic Dual Inline Package) with 0.300" body width, lead pitch of 0.100", and RoHS-compliant lead-free/halogen-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must be held low for ≥250 ns before SK edge to initiate valid instruction |
| SK | Serial Clock | Input clock synchronizing all data transfers; rising edge samples DI, drives DO output |
| DI | Serial Data Input | Accepts instruction start bit, op code, address, and 16-bit write data; high-impedance when not selected |
| DO | Serial Data Output | Outputs 16-bit read data (preceded by dummy "0") or ready/busy status (logic "1" = ready) |
| GND | Ground Reference | Return path for VCC and all I/O; requires low-impedance connection to minimize noise coupling |
| VCC | Power Supply | Single supply input (2.7–5.5 V); powers internal logic, memory array, and output buffer |
| DC | Don't Connect | No internal connection; must remain floating or tied to GND per layout guidelines |
| NC | No Connect | Unused pin; electrically isolated - no routing or soldering required |
Key Features
| Feature | Design Value |
|---|---|
| Three-wire serial interface | Reduces MCU GPIO count and PCB routing complexity vs. parallel or SPI EEPROMs |
| Self-timed write/erase | Eliminates need for external write-complete polling or timeout management in host firmware |
| Erase/write protection via EWEN/EWDS | Prevents accidental overwrites during power transitions or software faults |
| Ready/busy status on DO | Enables efficient host synchronization without fixed delays or continuous pin monitoring |
| Lead-free/halogen-free packaging | Meets IPC/JEDEC J-STD-609A Class 1 moisture sensitivity and RoHS 3 compliance |
Applications
| Industrial Sensor Calibration | Embedded Boot Configuration |
|---|---|
Use Scenario: Storing factory-calibrated gain/offset coefficients and linearization tables in pressure, temperature, or current sensors. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed during sensor power-up or self-test sequence. Use Value: Enables plug-and-play sensor replacement without manual recalibration; retains values across 100-year shelf life. | Use Scenario: Holding bootloader configuration flags, secure boot keys, or peripheral initialization settings in microcontroller-based edge devices. IC Role / Device Role / Timing Role: Early-boot serial EEPROM providing trusted parameter source before main flash execution. Use Value: Supports field-upgradable security policies and hardware-specific boot modes without modifying primary firmware image. |
| Automotive Body Control Module | Medical Device Parameter Storage |
Use Scenario: Saving user preferences (mirror position, seat memory), fault logs, and adaptive lighting profiles in BCMs. IC Role / Device Role / Timing Role: Low-power, AEC-Q200-aligned nonvolatile memory interfaced to 8-bit/16-bit MCUs via minimal GPIOs. Use Value: Withstands −40°C to +85°C ambient and 1M write cycles, enabling reliable recall after 15+ years of vehicle service. | Use Scenario: Storing FDA-mandated device serial numbers, calibration timestamps, and usage counters in portable diagnostic equipment. IC Role / Device Role / Timing Role: Tamper-resistant, long-retention memory for audit-trail-critical data requiring traceability over product lifetime. Use Value: Meets IEC 62304 software lifecycle requirements with guaranteed 100-year data integrity and write endurance for regulatory documentation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95128-DRMN6TP/K | 256K-bit SPI interface, 5V tolerant, 20 MHz max clock, SO8 package only | Higher density and faster interface but requires SPI controller and additional CS line | Select when system already uses SPI peripherals and needs >1K-bit storage; not pin-compatible |
| BR24G02FJ-WE2 | I²C interface, 2K-bit, 1.7–5.5V, TSSOP8, 400 kHz standard mode | Two-wire bus reduces pin count further but introduces arbitration and ACK overhead | Choose for space-constrained designs using I²C infrastructure; incompatible protocol and timing |
Compared with M95128-DRMN6TP/K and BR24G02FJ-WE2, the AT93C46A-10PU-2.7 offers deterministic three-wire timing, minimal MCU GPIO usage (3 pins), and guaranteed 2.7V operation - making it optimal for legacy 8-bit controllers and cost-sensitive industrial modules where SPI/I²C peripherals are unavailable or underutilized.
Availability
AT93C46A-10PU-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded boot configuration, and automotive body control modules requiring stable component supply across extended product lifecycles.
Supply support for AT93C46A-10PU-2.7 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, with broad industrial and automotive qualification coverage.
The AT93C46A-10PU-2.7 belongs to Microchip's legacy serial EEPROM product line, designed specifically for low-pin-count, low-power, and high-reliability configuration storage in resource-constrained embedded systems.
FAQ
What is the operating voltage range of the AT93C46A-10PU-2.7?
The AT93C46A-10PU-2.7 operates from 2.7V to 5.5V, supporting both 3.3V and 5V logic systems without level translation. This dual-voltage capability allows direct integration with a wide range of microcontrollers and FPGAs. The part maintains full AC/DC specifications across this range, including 2 MHz clock compatibility at 5V and guaranteed 100-year data retention at rated temperatures. AT93C46A-10PU-2.7 does not support the 1.8V variant - that is designated separately as AT93C46A-10PU-1.8.
How many write cycles can the AT93C46A-10PU-2.7 endure?
The AT93C46A-10PU-2.7 guarantees 1 million write/erase cycles per memory location, validated under standard industrial conditions (VCC = 5.0V, TA = 25°C). This endurance rating applies to individual word writes, bulk erase (ERAL), and full-array write (WRAL) operations. Each write cycle is self-timed and completes within 10 ms maximum, enabling predictable firmware scheduling. AT93C46A-10PU-2.7 retains this specification across its full operating temperature range (−40°C to +85°C) and voltage range (2.7–5.5 V).
Does the AT93C46A-10PU-2.7 support ready/busy status reporting?
Yes, the AT93C46A-10PU-2.7 reports ready/busy status on the DO pin: a logic "1" indicates completion of a write or erase operation, while a logic "0" indicates ongoing activity. This status is accessible only when CS is asserted high after being held low for ≥250 ns (tCS), and remains valid until the next instruction begins. The feature eliminates the need for fixed-delay polling loops and enables efficient host synchronization. AT93C46A-10PU-2.7 does not provide interrupt or dedicated BUSY pin - status is strictly serial and pin-multiplexed.
What packages are available for the AT93C46A-10PU-2.7?
The AT93C46A-10PU-2.7 is supplied exclusively in the 8-lead PDIP (Plastic Dual Inline Package) with 0.300" body width and lead pitch of 0.100". The "U" suffix in the part number explicitly denotes PDIP packaging, distinguishing it from SOIC ("S") and TSSOP ("T") variants. This through-hole package supports manual prototyping, socket-based testing, and legacy board assembly. AT93C46A-10PU-2.7 is lead-free and halogen-free, meeting RoHS 3 and JEDEC J-STD-609A Class 1 standards.
Is the AT93C46A-10PU-2.7 compatible with automotive applications?
Yes, the AT93C46A-10PU-2.7 is qualified for automotive-grade use with an extended industrial temperature range of −40°C to +85°C and AEC-Q200 alignment per its datasheet characterization. It supports automotive body electronics such as mirror/seat memory, lighting control, and gateway module configuration storage. While not formally AEC-Q200 certified as a standalone part, its process, testing, and reliability data (1M cycles, 100-year retention, ESD >4 kV HBM) meet automotive subsystem requirements. AT93C46A-10PU-2.7 is widely deployed in Tier-1 automotive modules where extended temperature and long-term data integrity are mandatory.
AT93C46A-10PU-2.7 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:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT93C46A-10PU-2.7 FAQ
1.How can I place an order for AT93C46A-10PU-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46A-10PU-2.7 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-2.7 reliable?
The price and inventory of AT93C46A-10PU-2.7 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-2.7 is usually 5 days.
3.What payment methods are accepted for AT93C46A-10PU-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46A-10PU-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46A-10PU-2.7?
AT93C46A-10PU-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46A-10PU-2.7 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-2.7?
For technical support, including AT93C46A-10PU-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46A-10PU-2.7 requirements.
6.How does Aetrix verify that AT93C46A-10PU-2.7 is sourced from the original manufacturer or authorized distributors?
All AT93C46A-10PU-2.7 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-2.7 meets industry standards.
7.What is the process for return or replacement of AT93C46A-10PU-2.7?
All AT93C46A-10PU-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46A-10PU-2.7, 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-2.7 part is unused and in its original packaging.
Return procedure for AT93C46A-10PU-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT93C46A-10PU-2.7 Tags
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