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Microchip Technology AT93C46A-10SU-2.7
- Part No.:
- AT93C46A-10SU-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C46A-10SU-2.7.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,371
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Product details
Overview
AT93C46A-10SU-2.7 from Microchip Technology (formerly Atmel) is a 1K-bit serial EEPROM organized as 64 words × 16 bits, featuring a three-wire SPI-compatible interface (CS/SK/DI/DO), 2.7V to 5.5V supply operation, and self-timed write cycles up to 10 ms. It delivers high reliability with 1 million write cycles and 100-year data retention, targeting configuration storage in industrial control modules, automotive body electronics, and embedded sensor nodes.
For engineers reviewing the AT93C46A-10SU-2.7 datasheet, AT93C46A-10SU-2.7 pinout, AT93C46A-10SU-2.7 application, or AT93C46A-10SU-2.7 equivalent, this page provides verified electrical specifications, package mapping to 8-lead SOIC (8S1), functional timing behavior, real-world use scenarios, and two validated alternative parts for design continuity planning.
Technical Context
The AT93C46A-10SU-2.7 implements a synchronous serial interface with chip-select–gated access and supports seven instruction opcodes (READ, EWEN, ERASE, WRITE, ERAL, WRAL, EWDS) decoded from a start bit + 2-bit opcode + 6-bit address. All programming operations require prior execution of EWEN and are disabled by EWDS to prevent accidental writes.
It features dual-voltage support: the -2.7 suffix denotes guaranteed operation from 2.7V to 5.5V, with input thresholds (VIL/VIH) and output drive (VOL/VOH) specified across that range. AC timing parameters-including SK clock frequency up to 2 MHz at 5V, tSKH/tSKL ≥ 250 ns, and tWP ≤ 10 ms-are fully characterized for industrial temperature (−40°C to +85°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (64 × 16-bit words) - fixed organization; no byte-addressable access |
| Supply Voltage | 2.7V to 5.5V - enables direct interfacing with 3.3V and 5V microcontrollers without level shifters |
| Interface | Three-wire serial (CS/SK/DI/DO) - compatible with SPI master mode using software bit-banging or hardware SPI with CS control |
| Write Cycle Time | Max 10 ms - self-timed; DO pin indicates busy/ready status during write via CS-high sampling |
| Endurance | 1 million write cycles - sufficient for firmware parameter logging or calibration storage in field-deployed equipment |
| Data Retention | 100 years at 25°C - ensures long-term validity of stored configuration or calibration data |
| Operating Temp | −40°C to +85°C - qualified for industrial and automotive under-hood applications |
Pinout & Package
AT93C46A-10SU-2.7 is supplied in an 8-lead JEDEC SOIC package (package code 8S1), measuring 5.0 mm × 6.2 mm × 1.75 mm (max height), with gull-wing leads and lead-free/halogen-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must be held low for entire instruction sequence; DO outputs ready/busy status when pulled high mid-cycle |
| SK | Serial Clock | Input clock synchronized to host controller; max 2 MHz at 5V; defines timing for DI sampling and DO output edges |
| DI | Data Input | Serial instruction/data input; accepts start bit + opcode + address (READ/ERASE/WRITE) or 16-bit data (WRITE) |
| DO | Data Output | Open-drain output; drives data during READ; returns logic 0 (busy) or 1 (ready) during write status polling |
| VCC | Power Supply | 2.7V–5.5V supply; decoupling capacitor required near pin for stable read/write operation |
| GND | Ground | Reference return path for all I/O and internal circuitry; must be connected to system ground plane |
| NC | No Connect | Internally unconnected; must remain floating or tied to GND per layout best practice (not driven) |
| DC | Device Code | Factory-programmed identification pin; not used in standard operation; left unconnected in typical designs |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed write cycle | Eliminates need for external write-complete polling delay; DO status bit enables precise host synchronization |
| Erase/write enable/disable protocol | EWEN/EWDS instructions prevent accidental overwrites-critical for field-updatable systems with persistent settings |
| Dual voltage range support | 2.7V–5.5V operation allows drop-in replacement in both 3.3V and 5V legacy systems without redesign |
| Industrial temperature grade | −40°C to +85°C qualification ensures reliable boot-time configuration loading in harsh environments |
| Lead-free/halogen-free packaging | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow profiles for automated assembly |
Applications
| Motor Control Configuration | Automotive Body Controller |
|---|---|
Use Scenario: Storing motor phase calibration offsets, current limit thresholds, and startup ramp profiles in BLDC driver modules. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during MCU initialization before PWM generation begins. Use Value: Enables field recalibration without firmware update; retains values across power cycles and thermal stress. | Use Scenario: Holding door lock actuator timing maps, mirror position presets, and lighting dimming curves in vehicle body control units. IC Role / Device Role / Timing Role: Serial configuration store interfaced to 8-bit automotive MCU via GPIO bit-banged SPI. Use Value: Survives 100+ year data retention requirement for OEM service life; operates reliably at −40°C cold cranking. |
| Industrial Sensor Node | Medical Diagnostic Equipment |
Use Scenario: Saving sensor linearization coefficients, gain trim values, and factory calibration dates in wireless temperature/humidity transmitters. IC Role / Device Role / Timing Role: Low-power serial memory accessed only during device wake-up or commissioning-minimizes active current draw. Use Value: 20 µA standby current at 2.7V extends battery life in energy-harvesting deployments. | Use Scenario: Storing user-defined display contrast levels, alarm thresholds, and audit log timestamps in portable ultrasound devices. IC Role / Device Role / Timing Role: Secure configuration storage isolated from main processor bus; accessed only during GUI initialization. Use Value: 1M endurance supports daily clinical recalibration without wear-out risk over 10-year product lifecycle. |
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 (16K × 8), SPI interface, 2.5–5.5V, 20 MHz clock, WIP bit polling instead of DO status | Higher density, faster interface, but requires different command set and no ready/busy DO pin | Choose when migrating to larger configuration space and higher throughput; requires firmware rewrite and layout review for SPI signal integrity |
| BR24G01FJ-WE2 | 1 Kbit (128 × 8), I²C interface, 1.7–5.5V, 400 kHz, built-in write protection (WP pin) | I²C bus compatibility, lower pin count (2-wire), but lacks three-wire timing flexibility and status feedback | Prefer for space-constrained boards with existing I²C infrastructure; avoid if DO status polling or deterministic write timing is required |
Compared with M95128-WMN6TP and BR24G01FJ-WE2, the AT93C46A-10SU-2.7 offers unique ready/busy status reporting via DO pin and deterministic 10 ms max write time-enabling simpler, more robust host firmware without timeout loops or interrupt-driven completion handling.
Availability
AT93C46A-10SU-2.7 is available at Aetrix Electronics and suitable for industrial automation controllers, automotive body electronics, and medical diagnostic equipment requiring stable component supply across extended product lifecycles.
Supply support for AT93C46A-10SU-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 AT93C46A series belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-pin-count applications needing reliable configuration storage with minimal MCU resource usage.
FAQ
What is the maximum clock frequency supported by AT93C46A-10SU-2.7?
The AT93C46A-10SU-2.7 supports a maximum SK clock frequency of 2 MHz when operated at VCC = 5.0V. At 2.7V, the maximum rated clock frequency drops to 1 MHz, and at 1.8V it is 0.25 MHz. These limits are defined in Table 4 of the datasheet and reflect guaranteed timing margins across the full industrial temperature range (−40°C to +85°C). Exceeding these frequencies may result in unreliable instruction decoding or data corruption.
Does AT93C46A-10SU-2.7 require an external erase cycle before writing?
No, the AT93C46A-10SU-2.7 does not require a separate erase cycle before writing. Each WRITE instruction automatically erases the target 16-bit word before programming new data. The device uses a self-timed write cycle (tWP ≤ 10 ms) that internally handles both erase and program phases. This eliminates the need for pre-erase commands and simplifies firmware implementation compared to flash-based alternatives.
How is ready/busy status reported during a write cycle in AT93C46A-10SU-2.7?
During a write cycle, the AT93C46A-10SU-2.7 reports ready/busy status on the DO pin. After initiating a WRITE instruction, if CS is brought high for at least 250 ns (tCS) while SK remains low, DO outputs logic 0 (busy) until programming completes, then transitions to logic 1 (ready). This status is valid only when sampled within the self-timed write window-sampling after tWP expires yields undefined DO state.
What is the function of the DC pin on AT93C46A-10SU-2.7?
The DC (Device Code) pin on AT93C46A-10SU-2.7 is a factory-programmed identification pin used internally for production testing and marking. It is not functional in normal operation and must be left unconnected (floating) or tied to GND per board layout guidelines. Driving or pulling DC high may cause undefined behavior and is strictly prohibited per the datasheet.
Can AT93C46A-10SU-2.7 be used in 1.8V systems?
No, the AT93C46A-10SU-2.7 is specifically rated for 2.7V to 5.5V operation, as indicated by the "-2.7" suffix in its ordering code. For 1.8V systems, the correct variant is AT93C46A-10SU-1.8, which guarantees functionality down to 1.8V and uses different input/output threshold specifications (VIL2/VIH2, VOL2/VOH2). Using AT93C46A-10SU-2.7 below 2.7V violates absolute maximum ratings and risks data corruption or communication failure.
AT93C46A-10SU-2.7 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:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT93C46A-10SU-2.7 FAQ
1.How can I place an order for AT93C46A-10SU-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46A-10SU-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 AT93C46A-10SU-2.7 reliable?
The price and inventory of AT93C46A-10SU-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 AT93C46A-10SU-2.7 is usually 5 days.
3.What payment methods are accepted for AT93C46A-10SU-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46A-10SU-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46A-10SU-2.7?
AT93C46A-10SU-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46A-10SU-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 AT93C46A-10SU-2.7?
For technical support, including AT93C46A-10SU-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46A-10SU-2.7 requirements.
6.How does Aetrix verify that AT93C46A-10SU-2.7 is sourced from the original manufacturer or authorized distributors?
All AT93C46A-10SU-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 AT93C46A-10SU-2.7 meets industry standards.
7.What is the process for return or replacement of AT93C46A-10SU-2.7?
All AT93C46A-10SU-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46A-10SU-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 AT93C46A-10SU-2.7 part is unused and in its original packaging.
Return procedure for AT93C46A-10SU-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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