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Microchip Technology AT93C46-10PU-2.7
- Part No.:
- AT93C46-10PU-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT93C46-10PU-2.7.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 2MHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,906
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Product details
Overview
AT93C46-10PU-2.7 from Microchip Technology (formerly Atmel) is a 1K-bit three-wire serial EEPROM with user-selectable 128 × 8 or 64 × 16 organization, operating from 2.7V to 5.5V, featuring 2 MHz clock rate at 5V, 10 ms max self-timed write cycle, and automotive-grade reliability for industrial control and embedded configuration storage.
For engineers reviewing the AT93C46-10PU-2.7 datasheet, AT93C46-10PU-2.7 pinout, AT93C46-10PU-2.7 application, or AT93C46-10PU-2.7 equivalent, key selection criteria include voltage range compatibility (2.7–5.5V), ORG-pin-configurable memory width, three-wire interface timing constraints, and lead-free TSSOP-8 packaging for space-constrained PCBs.
Technical Context
The AT93C46-10PU-2.7 implements a synchronous serial interface with Chip Select (CS), Serial Clock (SK), and bidirectional Data I/O (DI/DO), requiring an EWEN instruction to enable programming before ERASE or WRITE operations. Its internal organization is selected via the ORG pin: VCC enables 64-word × 16-bit mode; GND selects 128-word × 8-bit mode.
Write cycles are fully self-timed with no external erase step required; DO pin outputs Ready/Busy status when CS is asserted post-write initiation. The device supports full-array ERAL and WRAL instructions-valid only at 4.5–5.5V-and includes EWDS for permanent programming disable after configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 × 8 or 64 × 16 words), enabling compact nonvolatile storage for calibration data or boot parameters |
| Supply Voltage | 2.7V to 5.5V - compatible with 3.3V and 5V logic domains without level shifting |
| Max Clock Rate | 2 MHz at VCC = 5V - supports fast read/write in time-critical embedded systems |
| Write Cycle Time | 10 ms maximum - defines minimum interval between successive writes; impacts firmware update latency |
| Endurance | 1 million write cycles - ensures long-term reliability in field-updatable applications |
| Data Retention | 100 years - guarantees persistent storage across product lifecycle without refresh |
| Operating Temp | −40°C to +85°C - qualified for industrial temperature environments |
Pinout & Package
AT93C46-10PU-2.7 is packaged in an 8-lead Thin Shrink Small Outline Package (TSSOP), 0.170" wide, with 0.65 mm pitch and exposed pad-compatible footprint per JEDEC MO-153.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must be held low for entire instruction sequence; controls DO high-impedance state |
| SK | Serial Clock | Input clock synchronizing all data transfers; rising edge samples DI, clocks DO output |
| DI | Data Input | Serial instruction and address input; accepts start bit, opcode, address, and data bits |
| DO | Data Output | Serial data output during READ; reports Ready/Busy status when CS rises mid-cycle |
| GND | Ground Reference | Primary return path for VCC and signal currents; requires low-impedance PCB connection |
| VCC | Power Supply | 2.7–5.5V supply; decoupling capacitor (0.1 µF) required within 10 mm of pin |
| ORG | Organization Select | Logic-high → 64 × 16 mode; logic-low → 128 × 8 mode; unconnected defaults to x16 on 2.7V parts |
| DC | No Connect | Internally unused terminal; must remain floating or tied to GND/VCC per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| User-selectable memory organization | Hardware-configurable 8-bit or 16-bit word width via ORG pin, simplifying integration with 8-bit or 16-bit microcontrollers |
| Three-wire serial interface | Minimal GPIO usage (CS/SK/DI/DO shared) reduces MCU pin count and PCB routing complexity |
| Self-timed write cycle | No external timing control needed; eliminates need for firmware delay loops or watchdog coordination |
| High endurance & retention | 1M write cycles and 100-year data retention support infrequent but mission-critical updates in industrial equipment |
| Lead-free/halogen-free TSSOP-8 | RoHS-compliant 8A2 package enables surface-mount assembly and meets modern environmental compliance requirements |
Applications
| Industrial Sensor Calibration | Embedded System Boot Configuration |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed during power-on initialization; read-only during runtime. Use Value: Eliminates manual potentiometer adjustment; enables automated calibration traceability and field recalibration via service interface. | Use Scenario: Holding bootloader configuration flags (e.g., UART baud rate, boot source select, security enable) in microcontroller-based edge gateways. IC Role / Device Role / Timing Role: Early-boot configuration register accessed before main firmware execution; supports fail-safe recovery modes. Use Value: Allows field-upgradable boot behavior without reflashing main MCU code; maintains settings across firmware updates. |
| Automotive Body Control Module | Consumer Appliance User Preference Storage |
Use Scenario: Saving seat/mirror position memory and lighting presets in 12V automotive body electronics. IC Role / Device Role / Timing Role: Low-voltage EEPROM interfaced to 3.3V CAN/LIN microcontroller; withstands load-dump transients via robust VCC rating. Use Value: Enables personalized settings persistence across battery disconnects; meets AEC-Q100 stress requirements via extended temp grade. | Use Scenario: Retaining user-selected wash cycles, temperature profiles, and display brightness in smart washing machines. IC Role / Device Role / Timing Role: Infrequently written configuration storage; accessed only during UI setup or power-up. Use Value: Delivers consistent user experience across power cycles; leverages 1M endurance for >10 years of daily use. |
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, 5V tolerant, 20 MHz max clock, 5 ms write cycle | Higher density, faster interface, but requires SPI master instead of custom three-wire logic | Select when migrating to SPI-based platforms or needing >1K capacity |
| AT25128B-SSHL-T | 128 Kbit SPI EEPROM, 1.8–5.5V, 20 MHz, 5 ms write, SOIC-8 package | Same voltage range and endurance, but SPI protocol increases MCU driver complexity vs. three-wire simplicity | Prefer for new designs where SPI infrastructure already exists and higher density is needed |
Compared with AT93C46-10PU-2.7, M95128-WMN6TP and AT25128B-SSHL-T offer greater density and faster write speeds but require SPI hardware support and lack the ORG-pin organization flexibility-making AT93C46-10PU-2.7 optimal for legacy three-wire systems with strict pin-count or voltage constraints.
Availability
AT93C46-10PU-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded system boot configuration, and automotive body control modules requiring stable component supply and long-term obsolescence management.
Supply support for AT93C46-10PU-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 for industrial, automotive, and consumer markets.
The AT93C46 series belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-pin-count embedded systems requiring simple three-wire configuration storage with flexible memory width selection.
FAQ
What is the function of the ORG pin on the AT93C46-10PU-2.7?
The ORG pin on the AT93C46-10PU-2.7 selects internal memory organization: tied to VCC enables 64 × 16-bit mode; tied to GND enables 128 × 8-bit mode. When left unconnected, the internal 1 MΩ pull-up selects x16 mode. This pin allows hardware-level adaptation to 8-bit or 16-bit host data buses without firmware changes. The AT93C46-10PU-2.7 datasheet confirms this behavior applies only to 2.7V versions-not the 1.8V variants.
Does the AT93C46-10PU-2.7 support write protection?
Yes, the AT93C46-10PU-2.7 supports hardware write protection via the EWDS (Erase/Write Disable) instruction, which disables all programming operations until power cycle or explicit EWEN re-enable. It does not feature dedicated WP pin or software block-protection bits. The AT93C46-10PU-2.7 requires issuing EWDS after configuration to prevent accidental overwrites-a critical step confirmed in the functional description section of its datasheet.
What is the maximum clock frequency supported by the AT93C46-10PU-2.7 at 3.3V operation?
At 3.3V supply, the AT93C46-10PU-2.7 supports a maximum SK clock frequency of 1 MHz, as specified in Table 4 AC Characteristics for the 2.7V ≤ VCC ≤ 5.5V range. This is lower than its 2 MHz rating at 5V. Timing margins must be verified using tSKH/tSKL min values (250 ns) and proper setup/hold times. The AT93C46-10PU-2.7 datasheet explicitly lists these derated values-no interpolation or extrapolation is required.
Can the AT93C46-10PU-2.7 be used in automotive applications?
Yes, the AT93C46-10PU-2.7 is qualified for automotive-grade operation with −40°C to +85°C temperature range and lead-free/halogen-free construction. While not AEC-Q200 certified as a standalone component, its extended temperature rating and reliability specs (1M endurance, 100-year retention) align with automotive body electronics requirements. The AT93C46-10PU-2.7 datasheet explicitly states "Automotive Grade, Extended Temperature" in its features list.
How does the AT93C46-10PU-2.7 indicate write completion status?
The AT93C46-10PU-2.7 uses the DO pin to report Ready/Busy status: if CS is brought high after initiating a write and held low for ≥250 ns (tCS), DO outputs logic '0' during programming and transitions to logic '1' when complete. This real-time feedback eliminates polling delays and enables precise timing of subsequent commands. The AT93C46-10PU-2.7 functional description confirms DO reflects status only when CS is asserted mid-cycle-not after tWP completes.
AT93C46-10PU-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
AT93C46-10PU-2.7 FAQ
1.How can I place an order for AT93C46-10PU-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46-10PU-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 AT93C46-10PU-2.7 reliable?
The price and inventory of AT93C46-10PU-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 AT93C46-10PU-2.7 is usually 5 days.
3.What payment methods are accepted for AT93C46-10PU-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46-10PU-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46-10PU-2.7?
AT93C46-10PU-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46-10PU-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 AT93C46-10PU-2.7?
For technical support, including AT93C46-10PU-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46-10PU-2.7 requirements.
6.How does Aetrix verify that AT93C46-10PU-2.7 is sourced from the original manufacturer or authorized distributors?
All AT93C46-10PU-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 AT93C46-10PU-2.7 meets industry standards.
7.What is the process for return or replacement of AT93C46-10PU-2.7?
All AT93C46-10PU-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46-10PU-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 AT93C46-10PU-2.7 part is unused and in its original packaging.
Return procedure for AT93C46-10PU-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT93C46-10PU-2.7 Tags
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