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Microchip Technology AT93C46E-PU
- Part No.:
- AT93C46E-PU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT93C46E-PU.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 2MHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:792
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Product details
Overview
AT93C46E-PU from Microchip Technology is a 1-Kbit three-wire serial EEPROM with fixed 64 × 16 internal organization, operating from 1.8V to 5.5V across -40°C to +85°C. It features a self-timed write cycle (≤5 ms), 1,000,000 write endurance, and 100-year data retention. Used for configuration storage in industrial controllers and embedded power management systems.
For engineers reviewing the AT93C46E-PU datasheet, AT93C46E-PU pinout, AT93C46E-PU application, or AT93C46E-PU equivalent, this page delivers verified electrical specs, package mapping, functional role in system boot/configuration, and validated alternative parts - all confirmed against Microchip DS20006224B.
Technical Context
The AT93C46E-PU implements a synchronous three-wire interface (CS/SK/DI/DO) with no ORG pin - unlike the AT93C46D - locking memory organization to 64 words × 16 bits. Communication uses rising-edge clocking on SK, with instruction framing starting on CS high, and DO outputting Ready/Busy status during write/erase cycles.
It lacks user-selectable x8/x16 mode due to NC ORG pin, eliminating external organization control. All commands (READ, WRITE, ERASE, WRAL, ERAL, EWEN, EWDS) are issued via serial bitstream with address and data fields sized per fixed x16 layout, and write operations require prior EWEN activation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1,024 bits organized as 64 × 16 - fixed layout; no x8 option available. |
| Supply voltage | 1.8V to 5.5V - supports single-supply operation in battery-powered and industrial 3.3V/5V systems. |
| Write cycle time | Max 5 ms - self-timed; eliminates need for external timing control or polling delay estimation. |
| Endurance | 1,000,000 write cycles - enables frequent recalibration or runtime parameter logging in field-deployed devices. |
| Data retention | 100 years at 55°C - ensures long-term reliability for unattended infrastructure equipment. |
| Clock frequency | Up to 2 MHz at 4.5–5.5V - enables fast configuration readout during system boot (<130 µs for full 64-word read). |
| Operating temperature | -40°C to +85°C - qualified for industrial-grade embedded applications without derating. |
Pinout & Package
AT93C46E-PU is supplied in 8-lead PDIP (Plastic Dual In-Line Package) with 0.300-inch body width. Pin 1 is marked by notch or dot; leads are tin-lead or lead-free per RoHS compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: CS | Chip Select | Active-high enable; device ignores DI and tri-states DO when low - enables multi-device bus sharing. |
| 2: SK | Serial Data Clock | Rising-edge synchronized I/O; latches DI input and clocks DO output - defines timing boundary for all commands. |
| 3: DI | Serial Data Input | Receives instruction opcodes, addresses, and write data; sampled on SK rising edge - requires setup/hold timing compliance. |
| 4: DO | Serial Data Output | Outputs read data and Ready/Busy status; high-impedance when CS low - prevents bus contention in multi-slave systems. |
| 5: GND | Ground reference | System return path for VCC and signal currents - must be low-impedance connection to avoid noise-induced corruption. |
| 6: NC | No Connect | Internally unconnected; must remain floating - ties to VCC/GND would violate AT93C46E's fixed x16 architecture. |
| 7: NC | No Connect | Unused pin; no internal bond - PCB layout may omit trace or leave unconnected per Microchip recommendation. |
| 8: VCC | Power supply | 1.8–5.5V input; includes internal POR circuit - requires ≥100 µs delay after stable VCC before first command. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 64 × 16 organization | Eliminates external ORG pin routing and configuration logic - simplifies PCB layout and firmware initialization. |
| Three-wire serial interface | Reduces MCU GPIO count vs. parallel EEPROMs - ideal for space-constrained microcontroller-based modules. |
| Self-timed write cycle | Removes need for software wait states or hardware timers - streamlines firmware development and improves write predictability. |
| Industrial temperature range | Validated operation from -40°C to +85°C - suitable for outdoor metering, factory automation, and motor drive control units. |
| RoHS-compliant green packaging | Lead-free, halide-free construction - meets global environmental compliance requirements for commercial and industrial shipments. |
Applications
| Industrial Sensor Calibration | Embedded Power Supply Configuration |
|---|---|
|
Use Scenario: Storing sensor offset/gain coefficients and linearization tables in programmable temperature/humidity transmitters. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed during power-up and field recalibration sequences. Use Value: Enables field-updatable calibration without firmware reflash; 100-year retention ensures accuracy over product lifetime. |
Use Scenario: Holding voltage/current setpoints, protection thresholds, and startup sequencing parameters in AC-DC and DC-DC modules. IC Role / Device Role / Timing Role: Boot-time configuration source for digital power controllers (e.g., PMBus-enabled ICs). Use Value: Supports dynamic parameter adjustment via host MCU; 1.8V operation allows direct interface with low-voltage controllers. |
| Motor Drive Parameter Storage | IoT Edge Device Identity |
|
Use Scenario: Saving torque curves, commutation angles, and fault log history in BLDC motor drives deployed in HVAC and robotics. IC Role / Device Role / Timing Role: Persistent memory for runtime-tuned operational parameters and diagnostic event timestamps. Use Value: 1M write cycles support frequent adaptation during commissioning and maintenance; 5 ms write enables real-time updates. |
Use Scenario: Securing MAC address, device serial number, and cryptographic key seeds in battery-powered wireless sensors. IC Role / Device Role / Timing Role: Immutable identity anchor used during secure boot and TLS certificate provisioning. Use Value: Low standby current (≤1.0 µA at 1.8V) extends battery life; RoHS compliance supports global IoT certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT93C46D-PU | Includes functional ORG pin enabling x8/x16 selection; otherwise identical pinout, timing, and voltage range. | Required where firmware must support both 8-bit and 16-bit memory access patterns dynamically. | Select AT93C46D-PU only if x8/x16 flexibility is needed; AT93C46E-PU is preferred for fixed 16-bit systems to avoid ORG pin misconnection risk. |
| M95128-WMN6TP | 256-Kbit SPI EEPROM (8-pin SO8); 5V-only operation; 10 MHz max clock; different command set and addressing. | Used where higher density or faster SPI interface is required; not drop-in compatible due to protocol and voltage mismatch. | Choose M95128-WMN6TP only when migrating to SPI-based designs with >1K capacity needs; AT93C46E-PU remains optimal for legacy three-wire systems. |
Compared with AT93C46D-PU, AT93C46E-PU removes ORG pin ambiguity and simplifies layout, while M95128-WMN6TP trades pin compatibility for higher speed and density - making AT93C46E-PU the most robust choice for cost-sensitive, fixed-configuration industrial EEPROM use cases.
Availability
AT93C46E-PU is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded power supply configuration, and motor drive parameter storage requiring stable component supply across extended production lifecycles.
Supply support for AT93C46E-PU 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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with ISO 9001-certified manufacturing and global distribution.
The AT93C46E-PU belongs to Microchip's legacy AT93Cxx serial EEPROM family, designed specifically for low-pin-count, low-power configuration storage in industrial and commercial embedded systems.
FAQ
What is the memory organization of AT93C46E-PU?
The AT93C46E-PU has a fixed internal organization of 64 words × 16 bits (1,024 bits total). Unlike the AT93C46D, it does not support x8 mode because its ORG pin is internally disconnected (NC), eliminating user-selectable configuration. This is explicitly stated in Microchip DS20006224B Section 3 and Table 2-1.
Does AT93C46E-PU support 1.8V operation?
Yes, AT93C46E-PU operates from 1.8V to 5.5V across the full industrial temperature range (-40°C to +85°C). At 1.8V, maximum clock frequency is 250 kHz, and standby current is ≤1.0 µA - confirmed in DS20006224B Sections 4.2 and 4.3.
What is the maximum write endurance of AT93C46E-PU?
The AT93C46E-PU guarantees 1,000,000 write cycles at 25°C and 5.0V, with data retention rated at 100 years at 55°C. These values are characterized and specified in DS20006224B Table 4-6 and apply directly to the AT93C46E variant.
Can AT93C46E-PU be used as a direct replacement for AT93C46D-PU?
No - AT93C46E-PU is not a direct replacement for AT93C46D-PU because pin 6 (ORG) is NC on the AT93C46E-PU but functional on the AT93C46D-PU. If the host design ties ORG to VCC or GND, AT93C46E-PU will not respond correctly. Only use AT93C46E-PU in new designs where x16-only operation is intended.
What packages are available for AT93C46E-PU?
AT93C46E-PU is offered in 8-lead PDIP, 8-lead SOIC, and 8-lead TSSOP packages. The 8-pad UDFN and 8-ball VFBGA variants are exclusive to the AT93C46D per DS20006224B Page 4 footnote - confirming AT93C46E-PU's PDIP availability as indicated by the "-PU" suffix.
AT93C46E-PU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Kbit
- Memory Organization:
- 64 x 16
- Memory Interface:
- 3-Wire Serial
- Clock Frequency:
- 2 MHz
- Write Cycle Time - Word, Page:
- 5ms
- 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
AT93C46E-PU FAQ
1.How can I place an order for AT93C46E-PU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46E-PU 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 AT93C46E-PU reliable?
The price and inventory of AT93C46E-PU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT93C46E-PU is usually 5 days.
3.What payment methods are accepted for AT93C46E-PU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46E-PU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46E-PU?
AT93C46E-PU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46E-PU 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 AT93C46E-PU?
For technical support, including AT93C46E-PU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46E-PU requirements.
6.How does Aetrix verify that AT93C46E-PU is sourced from the original manufacturer or authorized distributors?
All AT93C46E-PU 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 AT93C46E-PU meets industry standards.
7.What is the process for return or replacement of AT93C46E-PU?
All AT93C46E-PU units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46E-PU, 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 AT93C46E-PU part is unused and in its original packaging.
Return procedure for AT93C46E-PU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT93C46E-PU Tags
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