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Microchip Technology AT93C46-10SU-1.8-T
- Part No.:
- AT93C46-10SU-1.8-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C46-10SU-1.8-T.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,077
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Product details
Overview
AT93C46-10SU-1.8-T from Microchip Technology (formerly Atmel) is a 1K-bit three-wire serial EEPROM with user-selectable 128 × 8 or 64 × 16 organization, operating from 1.8V to 5.5V supply, featuring 2 MHz clock rate at 5V, self-timed 10 ms max write cycle, and automotive-grade temperature range (−40°C to +85°C). It is used for configuration storage in embedded controllers and power management ICs where low-voltage operation and space-constrained PCB layout are critical.
For engineers reviewing the AT93C46-10SU-1.8-T datasheet, AT93C46-10SU-1.8-T pinout, AT93C46-10SU-1.8-T application, or AT93C46-10SU-1.8-T equivalent, key selection criteria include VCC min = 1.8V, 8-pin TSSOP package (8A2), ORG pin-controlled memory width, 1 million write endurance, and 100-year data retention - all confirmed for this exact variant.
Technical Context
The AT93C46-10SU-1.8-T implements a synchronous three-wire interface (CS/SK/DI/DO) with start-bit–driven instruction decoding and supports READ, WRITE, ERASE, EWEN, EWDS, ERAL, and WRAL commands. Its internal organization is dynamically selected via the ORG pin: tied to VCC enables 64 × 16 mode; grounded enables 128 × 8 mode.
It operates across two voltage domains: 1.8V–5.5V (this variant) and 2.7V–5.5V. Standby current is as low as 0.1 µA at 1.8V, and AC timing parameters (e.g., tSKH/tSKL = 1000 ns max at 1.8V) are fully characterized for industrial temperature range (−40°C to +85°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 × 8 or 64 × 16 organization) |
| Supply Voltage Range | 1.8V to 5.5V - enables direct interfacing with 1.8V logic and mixed-voltage systems |
| Max Clock Frequency | 2 MHz at 5V; 0.25 MHz at 1.8V - defines maximum serial throughput under low-VCC conditions |
| Write Cycle Time | 10 ms maximum - determines minimum time between successive write operations |
| Endurance | 1 million write cycles - supports frequent reconfiguration in field-upgradable devices |
| Data Retention | 100 years at 25°C - ensures long-term reliability in unattended equipment |
| Operating Temperature | −40°C to +85°C - qualified for industrial and automotive under-hood applications |
Pinout & Package
AT93C46-10SU-1.8-T is housed in an 8-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, body size 3.00 mm × 4.40 mm, 0.65 mm lead pitch, gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for serial communication; must be held low during instruction execution |
| SK | Serial Clock | Synchronizes data transfer on rising edge; frequency up to 2 MHz at 5V |
| DI | Data Input | Receives instruction opcodes, addresses, and write data; sampled on SK rising edge |
| DO | Data Output | Serially outputs read data or Ready/Busy status; high-impedance when CS is high |
| GND | Ground Reference | Return path for VCC and all I/O signals; requires low-impedance PCB connection |
| VCC | Power Supply | 1.8V–5.5V input; decoupling capacitor (0.1 µF) required near pin |
| ORG | Organization Select | Connect to VCC for 64 × 16 mode; ground for 128 × 8 mode; not functional on 1.8V variants per datasheet note |
| DC | Don't Connect | No internal connection; must remain floating or tied to GND/VCC per board layout rules |
Key Features
| Feature | Design Value |
|---|---|
| Three-wire serial interface | Reduces PCB routing complexity vs. SPI/I²C; only CS, SK, DI, DO pins required |
| User-selectable memory organization | Enables flexible byte- or word-oriented access without firmware changes |
| Self-timed write cycle | Eliminates need for external write-complete polling or timeout logic |
| 1.8V operation support | Allows direct integration with ultra-low-power microcontrollers and battery-backed systems |
| Lead-free/halogen-free packaging | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level MSL3 |
Applications
| Industrial Sensor Calibration | Embedded Power Sequencer |
|---|---|
Use Scenario: Storing factory-trimmed sensor offset/gain coefficients in HVAC or process control transmitters. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during power-on initialization. Use Value: Enables single-batch calibration and eliminates manual potentiometer adjustment, reducing manufacturing cost and drift over time. | Use Scenario: Holding boot sequence timing delays and rail-enable thresholds for multi-rail FPGA or ASIC power supplies. IC Role / Device Role / Timing Role: Configuration memory mapped into power management controller's address space. Use Value: Allows field updates to power-up sequencing without hardware change, improving design reuse across product families. |
| Automotive Body Control Module | Consumer Audio DSP Setup |
Use Scenario: Saving user preferences (window position, mirror angle, lighting profiles) in door modules. IC Role / Device Role / Timing Role: Low-voltage EEPROM interfaced directly to 1.8V CAN transceiver MCU GPIOs. Use Value: Survives cold-cranking (≥1.8V battery dip) and retains settings through 15+ year vehicle lifetime. | Use Scenario: Storing equalizer presets, input source mapping, and volume limiter thresholds in portable Bluetooth speakers. IC Role / Device Role / Timing Role: Serial configuration store accessed during audio subsystem initialization. Use Value: Supports fast boot (<500 ms) and zero-config user experience while minimizing BOM count vs. larger SPI flash. |
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 supply, 20 MHz clock, 5 ms write cycle | Higher density, faster interface, but requires 4-wire SPI and lacks ORG pin flexibility | Select when migrating to SPI-based platforms or requiring >1Kbit capacity |
| 24AA01-I/P | 1 Kbit I²C interface, 1.8–5.5V, 400 kHz clock, 5 ms write cycle, 8-lead PDIP/SOIC | Different protocol (I²C), no ORG pin, wider package options but no TSSOP-8 variant | Select when I²C bus is already present and footprint compatibility with SOIC-8 is acceptable |
Compared with M95128-WMN6TP and 24AA01-I/P, the AT93C46-10SU-1.8-T offers unique three-wire simplicity and ORG-selectable word width in a compact TSSOP-8 package, making it optimal for legacy designs constrained by pin count and requiring 1.8V operation without protocol conversion.
Availability
AT93C46-10SU-1.8-T is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded power sequencers, automotive body control modules, and consumer audio DSP setup requiring stable component supply and long-term lifecycle assurance.
Supply support for AT93C46-10SU-1.8-T 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 AT93C46 series belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, space-constrained applications requiring robust nonvolatile storage with minimal interface overhead and extended temperature reliability.
FAQ
What is the minimum supply voltage required for reliable operation of the AT93C46-10SU-1.8-T?
The AT93C46-10SU-1.8-T is specified for operation down to 1.8V, with full functionality including read, write, and erase commands guaranteed across the −40°C to +85°C temperature range. Below 1.8V, timing margins degrade and write endurance may fall below 1 million cycles. The device will not function reliably at 1.7V or lower, and no characterization data exists below 1.8V. Always maintain VCC ≥ 1.8V for guaranteed AT93C46-10SU-1.8-T performance.
Can the ORG pin on the AT93C46-10SU-1.8-T be left unconnected?
No - the ORG pin on the AT93C46-10SU-1.8-T must be actively driven to either VCC or GND. Per the datasheet, the ORG pin is not functional on 1.8V devices, meaning its state does not affect memory organization. However, leaving it floating violates CMOS input requirements and risks noise-induced latch-up or erratic behavior. For AT93C46-10SU-1.8-T, tie ORG to GND or VCC via a 10 kΩ resistor; do not leave open.
Does the AT93C46-10SU-1.8-T support write protection at the hardware level?
The AT93C46-10SU-1.8-T provides software-controlled write protection via the EWDS (Erase/Write Disable) instruction, which disables all programming modes until EWEN is issued again or power is cycled. There is no dedicated hardware write-protect pin (e.g., WP#). Protection relies entirely on correct command sequencing: after issuing EWDS, only READ remains active. This means AT93C46-10SU-1.8-T write security depends on firmware integrity and proper initialization flow.
What is the maximum clock frequency supported by the AT93C46-10SU-1.8-T at 1.8V?
At VCC = 1.8V, the AT93C46-10SU-1.8-T supports a maximum SK clock frequency of 0.25 MHz (250 kHz), as specified in Table 4 (AC Characteristics). This limit arises from internal timing constraints at low voltage and must be respected to ensure reliable instruction decode and data transfer. Exceeding 0.25 MHz at 1.8V risks read corruption, failed writes, or undefined status output on the DO pin during AT93C46-10SU-1.8-T operation.
Is the AT93C46-10SU-1.8-T pin-compatible with other members of the AT93C46/56/66 family?
Yes - the AT93C46-10SU-1.8-T shares identical pinout and package (8-lead TSSOP) with all AT93C46 variants, including AT93C46-10SU-2.7-T. It is not pin-compatible with AT93C56 or AT93C66 devices, which differ in memory size and instruction set addressing (e.g., 9-bit vs. 7-bit address fields). Swapping AT93C46-10SU-1.8-T for AT93C56-10SU-1.8-T will cause address decode failures and corrupted reads/writes due to incompatible command framing.
AT93C46-10SU-1.8-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT93C46-10SU-1.8-T FAQ
1.How can I place an order for AT93C46-10SU-1.8-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46-10SU-1.8-T 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 AT93C46-10SU-1.8-T reliable?
The price and inventory of AT93C46-10SU-1.8-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT93C46-10SU-1.8-T is usually 5 days.
3.What payment methods are accepted for AT93C46-10SU-1.8-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46-10SU-1.8-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46-10SU-1.8-T?
AT93C46-10SU-1.8-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46-10SU-1.8-T 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 AT93C46-10SU-1.8-T?
For technical support, including AT93C46-10SU-1.8-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46-10SU-1.8-T requirements.
6.How does Aetrix verify that AT93C46-10SU-1.8-T is sourced from the original manufacturer or authorized distributors?
All AT93C46-10SU-1.8-T 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 AT93C46-10SU-1.8-T meets industry standards.
7.What is the process for return or replacement of AT93C46-10SU-1.8-T?
All AT93C46-10SU-1.8-T units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46-10SU-1.8-T, 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 AT93C46-10SU-1.8-T part is unused and in its original packaging.
Return procedure for AT93C46-10SU-1.8-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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