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Microchip Technology AT93C46W-10SI
- Part No.:
- AT93C46W-10SI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C46W-10SI.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,764
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Product details
Overview
AT93C46W-10SI from Microchip Technology (formerly Atmel) is a 1K-bit 3-wire serial EEPROM with user-selectable 128 × 8 or 64 × 16 organization, operating from 2.7V to 5.5V, and rated for industrial temperature range (−40°C to +85°C). It features self-timed write cycles (≤10 ms), 1 million write endurance, and 100-year data retention - deployed in embedded system configuration storage, sensor calibration memory, and power-management parameter backup.
For engineers reviewing the AT93C46W-10SI datasheet, AT93C46W-10SI pinout, AT93C46W-10SI application, or AT93C46W-10SI equivalent, key selection criteria include low-voltage operation down to 2.7V, SOIC-8 (EIAJ) package compatibility, 2 MHz clock support at 5V, ORG-pin configurable word width, and industrial-grade reliability for automotive body control modules and industrial PLC I/O modules.
Technical Context
The AT93C46W-10SI implements a synchronous 3-wire serial interface (CS, SK, DI/DO) with instruction-based command set including READ, WRITE, ERASE, EWEN, and EWDS. Its internal organization is dynamically selected via the ORG pin: tied to VCC for 64 × 16 mode, grounded for 128 × 8 mode, or left unconnected (internal ~1 MΩ pull-up) for x16 default - though this pull-up is disabled on 1.8V variants (not applicable here).
Write operations require explicit Erase/Write Enable (EWEN) before programming; status is monitored via DO pin during CS high after tCS ≥ 250 ns. The device supports READY/BUSY polling and requires no external erase cycle - all write/erase functions are self-timed with tWP ≤ 10 ms at VCC ≥ 4.5V and ≤ 30 ms at VCC = 2.7V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 × 8 or 64 × 16 organization) |
| Supply Voltage Range | 2.7V to 5.5V - enables direct interface with 3.3V and 5V microcontrollers without level shifting |
| Max Clock Frequency | 2 MHz at 5V - supports high-speed configuration reads in boot-time sequences |
| Write Cycle Time | ≤10 ms (max) - ensures predictable firmware update latency in host-controlled calibration writes |
| Endurance & Retention | 1 million write cycles / 100 years data retention - suitable for field-updatable parameter storage in industrial equipment |
| Operating Temperature | −40°C to +85°C - qualified for under-hood automotive and factory-floor industrial environments |
| ESD Protection | >4000V HBM - robust against handling and board-level ESD events during manufacturing and service |
Pinout & Package
AT93C46W-10SI is housed in an 8-lead EIAJ SOIC package (package code 8S2), 0.200" wide, with standard gull-wing lead form. Pin 1 is marked by a beveled corner or dot; the package is RoHS-compliant and moisture-sensitive level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable: must be held low for entire instruction sequence; controls DO tri-state and command decoding |
| SK | Serial Clock | Synchronous edge-triggered input: rising edge latches DI, falling edge clocks DO; max 2 MHz at 5V |
| DI | Data Input | Serial command/address/data input - accepts 7-bit address + 2-bit opcode + optional data per instruction |
| DO | Data Output | Open-drain output with internal pull-up: delivers read data, READY/BUSY status, or high-impedance when CS high |
| GND | Ground Reference | Primary return path for VCC current and signal reference - must be low-impedance connection to system ground plane |
| VCC | Power Supply | Single 2.7–5.5V supply - powers internal logic, charge pump, and EEPROM array; bypass capacitor required |
| ORG | Organization Select | Logic-level input: VCC → 64×16 mode; GND → 128×8 mode; unconnected → internal pull-up selects x16 (valid at 2.7V+) |
| DC | Don't Connect | No internal connection - must be left floating or tied to GND/VCC only if required by PCB layout constraints |
Key Features
| Feature | Design Value |
|---|---|
| 3-wire serial interface | Reduces MCU GPIO count and PCB routing complexity vs. SPI/I²C; compatible with minimal microcontroller firmware stacks |
| User-selectable x8/x16 organization | Enables flexible byte- or word-aligned access without changing hardware - simplifies firmware adaptation across product variants |
| Self-timed write cycle | Eliminates need for external timing control or busy-wait loops - host can poll DO or use fixed delay (≤10 ms) for deterministic flow |
| Industrial temperature rating | Validated operation from −40°C to +85°C - supports deployment in engine control units, motor drives, and outdoor telecom equipment |
| High-reliability nonvolatile storage | 1M write cycles and 100-year retention meet long-life requirements for medical device calibration and industrial sensor zero-offset storage |
Applications
| Automotive Body Control Module | Industrial PLC I/O Configuration |
|---|---|
Use Scenario: Storing door lock actuator calibration offsets, mirror position presets, and lighting dimming profiles across vehicle lifecycle. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed during MCU boot and runtime via 3-wire serial bus; ORG pin hardwired for x16 mode to minimize address bits. Use Value: Enables field-upgradable settings without reprogramming MCU flash; 2.7V operation ensures functionality during cold-cranking battery dips. |
Use Scenario: Holding module-specific I/O mapping, scaling factors, and alarm thresholds for modular analog/digital I/O cards in programmable logic controllers. IC Role / Device Role / Timing Role: Dedicated parameter store interfaced to ARM Cortex-M host via GPIO-banged 3-wire protocol; write-protected during normal operation using EWDS. Use Value: Survives 1M+ configuration edits over 15+ years of plant operation; 100-year retention avoids recalibration during equipment relocation or long-term storage. |
| Medical Infusion Pump Calibration | Smart Energy Meter Firmware Parameters |
Use Scenario: Retaining flow-rate calibration coefficients, motor step compensation tables, and safety limit values across power cycles and firmware updates. IC Role / Device Role / Timing Role: Safety-critical parameter vault accessed only during maintenance mode; write-enabled only after multi-step host authentication sequence. Use Value: Meets IEC 62304 Class C software requirements via deterministic write timing (≤10 ms) and verified 1M-cycle endurance under thermal stress. |
Use Scenario: Storing tariff schedules, CT/PT ratio configurations, and tamper-event logs in ANSI C12.20-compliant electricity meters. IC Role / Device Role / Timing Role: Secure configuration store with dedicated write-enable handshake (EWEN) and status polling (DO) to prevent partial writes during grid transients. Use Value: Guarantees parameter integrity during brownouts (2.7V min) and meets ANSI 12.22 security lifetime requirements via 100-year data retention. |
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 (4-wire), 2.5–5.5V, 20 MHz clock, WLCSP package | Higher density, faster interface, but requires SPI peripheral and extra CS line; no ORG pin flexibility | Choose for bandwidth-constrained systems needing >1K storage and existing SPI infrastructure |
| STK12C68-5A5T | 8K-bit NVSRAM with parallel interface, 4.5–5.5V only, built-in lithium backup | Byte-wide random access, nanosecond read/write, but no low-voltage support and larger footprint | Prefer where microsecond read latency and unlimited write cycles outweigh density and voltage limitations |
Compared with M95128-WMN6TP and STK12C68-5A5T, the AT93C46W-10SI offers unique value in ultra-low-pin-count 3-wire systems requiring 1K-bit nonvolatile storage with dual-voltage operation, configurable word width, and industrial temperature assurance - without demanding SPI hardware or parallel bus resources.
Availability
AT93C46W-10SI is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC configuration, medical device calibration, and smart meter parameter storage requiring stable component supply across extended product lifecycles.
Supply support for AT93C46W-10SI 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 acquired Atmel in 2016 and maintains full technical and manufacturing continuity for the AT93C family. The company specializes in microcontrollers, analog, and nonvolatile memory solutions for embedded control markets.
The AT93C46W-10SI belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, space-constrained applications requiring reliable, low-pin-count nonvolatile storage in automotive, industrial, and medical systems.
FAQ
What is the function of the ORG pin on the AT93C46W-10SI?
The ORG pin on the AT93C46W-10SI selects internal memory organization: tied to VCC for 64 × 16 mode, grounded for 128 × 8 mode. With internal ~1 MΩ pull-up active at 2.7V+, leaving ORG unconnected defaults to x16 mode. This pin enables firmware-agnostic hardware reuse across byte- or word-oriented system architectures without redesigning the AT93C46W-10SI interface.
Does the AT93C46W-10SI support 1.8V operation?
No, the AT93C46W-10SI does not support 1.8V operation. Its ordering code "-2.7" specifies a 2.7V to 5.5V supply range. The 1.8V variant is designated with "-1.8" suffix (e.g., AT93C46W-10SI-1.8) and lacks the internal ORG pull-up. Using AT93C46W-10SI below 2.7V may result in unreliable read/write behavior or failure to enter programming modes.
How is write protection implemented on the AT93C46W-10SI?
Write protection on the AT93C46W-10SI is enforced via the Erase/Write Disable (EWDS) instruction. After power-on, the device defaults to EWDS state. Programming requires first issuing EWEN, then executing WRITE/ERASE commands, and finally sending EWDS to lock against accidental writes. The AT93C46W-10SI has no hardware write-protect pin - protection is purely instruction-based and host-controlled.
What package type is used for the AT93C46W-10SI?
The AT93C46W-10SI uses an 8-lead EIAJ SOIC package (package code 8S2), 0.200" wide, with gull-wing leads. This differs from the JEDEC SOIC (8S1) variant used in AT93C46W-10SC. The EIAJ outline has wider lead spacing and is commonly used in automotive and industrial designs requiring higher mechanical robustness and thermal cycling performance.
Can the AT93C46W-10SI be used as a direct replacement for AT93C46-10SI?
Yes, the AT93C46W-10SI is a functional and pin-compatible replacement for AT93C46-10SI. Both share identical pinout, electrical specifications, and 2.7–5.5V operation. The "W" suffix denotes enhanced reliability screening (e.g., extended temperature validation and wafer-level testing), making AT93C46W-10SI preferred for mission-critical automotive and industrial deployments where AT93C46-10SI was previously specified.
AT93C46W-10SI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT93C46W-10SI FAQ
1.How can I place an order for AT93C46W-10SI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46W-10SI 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 AT93C46W-10SI reliable?
The price and inventory of AT93C46W-10SI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT93C46W-10SI is usually 5 days.
3.What payment methods are accepted for AT93C46W-10SI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46W-10SI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46W-10SI?
AT93C46W-10SI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46W-10SI 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 AT93C46W-10SI?
For technical support, including AT93C46W-10SI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46W-10SI requirements.
6.How does Aetrix verify that AT93C46W-10SI is sourced from the original manufacturer or authorized distributors?
All AT93C46W-10SI 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 AT93C46W-10SI meets industry standards.
7.What is the process for return or replacement of AT93C46W-10SI?
All AT93C46W-10SI units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46W-10SI, 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 AT93C46W-10SI part is unused and in its original packaging.
Return procedure for AT93C46W-10SI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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