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Microchip Technology AT93C46E-TH-B
- Part No.:
- AT93C46E-TH-B
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT93C46E-TH-B.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,126
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Product details
Overview
AT93C46E-TH-B from Microchip Technology is a 1-Kbit three-wire serial EEPROM with fixed 64 × 16 internal organization, operating from 1.8V to 5.5V over -40°C to +85°C. It features self-timed write cycles ≤5 ms, 1,000,000 write endurance, and 100-year data retention. Used for configuration storage in industrial controllers and embedded sensor nodes where pin count and voltage flexibility are critical.
For engineers reviewing the AT93C46E-TH-B datasheet, AT93C46E-TH-B pinout, AT93C46E-TH-B application, or AT93C46E-TH-B equivalent, key selection factors include its non-user-selectable x16 organization, absence of ORG pin, SOIC-8 packaging, industrial temperature rating, and compatibility with low-voltage microcontroller I/O interfaces.
Technical Context
The AT93C46E-TH-B implements a synchronous three-wire serial 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 decoding initiated by CS high, and DO outputting data or Ready/Busy status depending on command phase.
It integrates on-chip high-voltage generation for EEPROM programming, power-on reset (POR) circuitry with 1.5 V threshold, and supports full-memory erase/write commands (ERAL/WRAL) only at VCC ≥4.5 V. Standby current is as low as 0.4 µA at 1.8 V, enabling battery-backed operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1,024 bits (64 × 16), fixed organization-no ORG pin support; eliminates external pull-up/down decisions. |
| Supply Voltage | 1.8 V to 5.5 V-enables direct interfacing with 1.8 V, 3.3 V, and 5 V logic without level shifters. |
| Write Cycle Time | Max 5 ms-self-timed; frees host MCU from polling delay; supports deterministic firmware timing. |
| Endurance & Retention | 1,000,000 write cycles / 100 years data retention at 55°C-validated for long-life industrial deployments. |
| Operating Temperature | -40°C to +85°C-qualified for industrial-grade environments including factory automation and outdoor metering. |
| Interface Clock Rate | Up to 2 MHz at 5 V-supports fast configuration loading; drops to 250 kHz at 1.8 V for ultra-low-power modes. |
| Package | 8-lead SOIC (TH-B)-standard footprint compatible with automated assembly and legacy PCB layouts. |
Pinout & Package
AT93C46E-TH-B is supplied in an 8-lead SOIC package (TH-B suffix). Pin 6 (ORG) is No Connect (NC), distinguishing it from AT93C46D and confirming fixed x16 organization.
| 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 and clocks DO-simplifies timing-critical MCU firmware. |
| 3: DI | Serial Data Input | Accepts instructions (READ/EWEN/WRITE), addresses, and data-requires setup/hold per VCC grade. |
| 4: DO | Serial Data Output | Outputs read data or Ready/Busy status (logic 0 = busy); high-impedance when CS low-prevents bus contention. |
| 5: GND | Ground Reference | System ground return path; must be low-impedance to ensure noise immunity during write operations. |
| 6: NC | No Connect | Unused pin; must remain unconnected-no pull-up/down required; distinguishes AT93C46E from AT93C46D. |
| 7: NC | No Connect | Unused pin; electrically isolated-no routing or termination needed on PCB. |
| 8: VCC | Power Supply | 1.8–5.5 V input; internal POR ensures safe initialization; decoupling capacitor (0.1 µF) required near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 64 × 16 Organization | Eliminates ORG pin routing and configuration ambiguity-reduces BOM variants and layout complexity. |
| Low-Voltage Operation (1.8 V) | Enables direct integration with energy-harvesting systems and coin-cell-powered devices without regulators. |
| Self-Timed Write Cycle | Removes need for external write-complete polling or timeout loops-simplifies driver development. |
| Industrial Temperature Range | Validated operation from -40°C to +85°C-suitable for uncontrolled environments like motor drives and HVAC controls. |
| Green Packaging | RoHS-compliant, halide-free SOIC-meets global environmental compliance requirements without derating. |
Applications
| Industrial Sensor Calibration | Consumer Appliance Configuration |
|---|---|
|
Use Scenario: Storing calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during power-up before ADC sampling begins. Use Value: Ensures repeatable measurement accuracy across field units without factory recalibration; leverages 100-year retention. |
Use Scenario: Saving user preferences (e.g., temperature setpoints, cycle timers) in smart washing machines and dishwashers. IC Role / Device Role / Timing Role: Persistent parameter store updated infrequently but requiring high reliability across 10+ years of service life. Use Value: Supports >1M write cycles-exceeds typical appliance lifetime usage; 1.8 V operation enables direct MCU I/O drive. |
| Medical Device Settings | Automotive Body Control Module |
|
Use Scenario: Retaining safety-critical operational parameters (e.g., alarm thresholds, calibration history) in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage accessed only during boot or maintenance mode via authenticated interface. Use Value: Industrial temp range and 100-year retention meet IEC 60601-1 long-term reliability requirements for Class II devices. |
Use Scenario: Storing door lock configuration, mirror position memory, and lighting profiles in automotive BCMs. IC Role / Device Role / Timing Role: Low-pin-count, low-power EEPROM interfaced to 3.3 V CAN microcontrollers for infrequent updates. Use Value: SOIC-8 package fits constrained BCM PCB space; 5.5 V tolerance accommodates automotive load-dump transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT93C46D-TH-B | Includes functional ORG pin; supports both 128×8 and 64×16 configurations via external connection. | Required when design needs runtime reconfiguration between x8/x16 addressing or shares layout with AT93C46E. | Select AT93C46D-TH-B only if ORG pin control is needed; otherwise AT93C46E-TH-B reduces component count and layout risk. |
| M95128-WMN6TP | 128-Kbit SPI EEPROM (16×8K); 4-wire interface; 20 MHz max clock; different command set and address width. | Suitable for higher-density storage but requires SPI controller support and larger PCB footprint (SOIC-8 same, but pinout incompatible). | Choose M95128-WMN6TP only when >1 Kbit capacity is required; not drop-in-firmware and layout changes needed. |
Compared with AT93C46D-TH-B, AT93C46E-TH-B removes ORG pin dependency for simplified layout and guaranteed x16 behavior; compared with M95128-WMN6TP, it offers lower density but identical SOIC-8 footprint and simpler three-wire protocol-ideal for cost- and space-constrained designs.
Availability
AT93C46E-TH-B is available at Aetrix Electronics and suitable for industrial automation, consumer appliance control, and medical device manufacturing requiring stable component supply, long-lifecycle assurance, and RoHS-compliant sourcing.
Supply support for AT93C46E-TH-B 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.
The AT93C46E-TH-B belongs to Microchip's legacy serial EEPROM product line, designed specifically for low-pin-count, low-voltage embedded systems requiring robust, long-life configuration storage.
FAQ
What is the memory organization of AT93C46E-TH-B?
The AT93C46E-TH-B has a fixed internal organization of 64 words × 16 bits (1,024 bits total). Unlike the AT93C46D, it lacks an ORG pin-so x8/x16 selection is not possible. This simplifies design by eliminating external pull-up/pull-down components and ensuring consistent addressing behavior across all units of AT93C46E-TH-B.
Does AT93C46E-TH-B support 1.8 V operation?
Yes, AT93C46E-TH-B operates across 1.8 V to 5.5 V. At 1.8 V, it supports up to 250 kHz clock frequency and achieves standby current as low as 0.4 µA. This makes AT93C46E-TH-B suitable for battery-powered or energy-harvesting applications where ultra-low power consumption is essential.
What is the maximum write cycle time for AT93C46E-TH-B?
The maximum write cycle time for AT93C46E-TH-B is 5 ms across its full 1.8–5.5 V supply range. This self-timed operation means the host MCU does not need to manage precise timing windows-after issuing a WRITE command, it can poll the DO pin for Ready/Busy status or wait a fixed 5 ms before proceeding.
Is AT93C46E-TH-B pin-compatible with AT93C46D-TH-B?
AT93C46E-TH-B and AT93C46D-TH-B share identical SOIC-8 pinouts and signal assignments, but Pin 6 (ORG) is No Connect on AT93C46E-TH-B versus functional on AT93C46D-TH-B. Layouts designed for AT93C46D-TH-B will accommodate AT93C46E-TH-B, but the ORG trace must remain unconnected or terminated as NC to avoid unintended behavior.
What is the data retention specification for AT93C46E-TH-B?
AT93C46E-TH-B guarantees 100 years of data retention at 55°C, validated through accelerated testing and qualification per JEDEC standards. This exceeds typical industrial equipment lifespans and ensures configuration data remains intact across decades of deployment-even in thermally stressed environments like enclosed control cabinets.
AT93C46E-TH-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- 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:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
AT93C46E-TH-B FAQ
1.How can I place an order for AT93C46E-TH-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46E-TH-B 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-TH-B reliable?
The price and inventory of AT93C46E-TH-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT93C46E-TH-B is usually 5 days.
3.What payment methods are accepted for AT93C46E-TH-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46E-TH-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46E-TH-B?
AT93C46E-TH-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46E-TH-B 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-TH-B?
For technical support, including AT93C46E-TH-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46E-TH-B requirements.
6.How does Aetrix verify that AT93C46E-TH-B is sourced from the original manufacturer or authorized distributors?
All AT93C46E-TH-B 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-TH-B meets industry standards.
7.What is the process for return or replacement of AT93C46E-TH-B?
All AT93C46E-TH-B units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46E-TH-B, 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-TH-B part is unused and in its original packaging.
Return procedure for AT93C46E-TH-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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