My Inquiry
My Account
Microchip Technology AT93C46A-10SU-2.7-T
- Part No.:
- AT93C46A-10SU-2.7-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C46A-10SU-2.7-T.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,816
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT93C46A-10SU-2.7-T from Microchip Technology (formerly Atmel) is a 1K-bit, 64-word × 16-bit serial EEPROM with three-wire interface, operating from 2.7V to 5.5V, featuring 1 million write cycles, 100-year data retention, and automotive-grade temperature range (−40°C to +85°C). It is used in industrial control systems for storing calibration data, configuration settings, and firmware parameters.
For engineers reviewing the AT93C46A-10SU-2.7-T datasheet, AT93C46A-10SU-2.7-T pinout, AT93C46A-10SU-2.7-T application, or AT93C46A-10SU-2.7-T equivalent, this page provides verified electrical specifications, validated pin functions, confirmed package dimensions (8-lead SOIC), real-world use scenarios, and two technically documented alternative parts for design flexibility.
Technical Context
The AT93C46A-10SU-2.7-T implements a synchronous three-wire serial interface (CS/SK/DI/DO) with instruction-based command set including READ, WRITE, ERASE, EWEN, EWDS, ERAL, and WRAL. It supports dual voltage operation (2.7V–5.5V), self-timed write cycle (≤10 ms), and ready/busy status reporting via DO pin during programming.
Memory organization is fixed at 64 × 16-bit words with no internal address pointer; each READ/WRITE requires explicit 6-bit address input. The device enters Erase/Write Disable (EWDS) state on power-up and requires explicit EWEN instruction before programming - ensuring data integrity against accidental writes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (64 words × 16 bits); enables compact storage of small configuration tables or calibration coefficients without external address decoding logic. |
| Supply Voltage Range | 2.7V to 5.5V; compatible with both 3.3V and 5V microcontroller I/O domains without level shifting. |
| Write Endurance | 1 million cycles; supports frequent field updates such as sensor offset recalibration or runtime parameter logging. |
| Data Retention | 100 years at 25°C; ensures long-term reliability in unattended industrial equipment and automotive modules. |
| Max Clock Frequency | 2 MHz at 5V; allows fast read/write throughput (e.g., ~16 µs per 16-bit word at max speed) for time-critical boot-time configuration loads. |
| Operating Temperature | −40°C to +85°C; qualified for industrial and automotive under-hood applications where ambient thermal stress is present. |
| Interface Protocol | Three-wire serial (CS/SK/DI/DO); reduces MCU pin count and PCB routing complexity versus SPI or I²C peripherals. |
Pinout & Package
AT93C46A-10SU-2.7-T is packaged in an 8-lead JEDEC SOIC (package code 8S1), 0.150" wide body, surface-mount format with standard gull-wing leads and pin 1 indicator marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; device ignores SK/DI until CS is asserted low, enabling multi-device bus sharing. |
| SK | Serial Clock | Synchronous edge-triggered clock (rising edge for data sampling); timing-critical for instruction decode and data transfer alignment. |
| DI | Data Input | Serial command and address/data input path; accepts start bit + op-code + 6-bit address + 16-bit data per WRITE instruction. |
| DO | Data Output | Tri-state serial output; delivers read data or ready/busy status (logic '0' = busy, '1' = ready) when CS is raised mid-cycle. |
| GND | Ground Reference | Primary return path for VCC current and signal reference; must be low-impedance to maintain noise immunity during write operations. |
| VCC | Power Supply | Single-supply input (2.7–5.5V); powers internal logic, memory array, and output buffer; decoupling capacitor required near pin. |
| DC | Device Configuration | Factory-bonded pin determining internal logic configuration; not user-accessible or externally connected in standard operation. |
| NC | No Connect | Internally unused terminal; must remain unconnected to avoid parasitic coupling or ESD risk. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed Write Cycle | Eliminates need for external write timing control or polling delay loops - DO pin signals completion status directly. |
| Erase/Write Enable Lock | Requires explicit EWEN instruction before programming; prevents unintended writes during power transients or software faults. |
| Dual-Voltage Compatibility | Supports both 2.7V–5.5V and 1.8V–5.5V variants; AT93C46A-10SU-2.7-T is specifically rated for 2.7V minimum, simplifying supply rail selection. |
| Automotive-Qualified Packaging | Lead-free/halogen-free 8-lead SOIC meets AEC-Q200 stress test requirements for vibration, thermal cycling, and humidity resistance. |
| Status Reporting via DO Pin | Enables real-time monitoring of write progress without dedicated status register reads - reduces host MCU overhead and bus traffic. |
Applications
| Industrial Sensor Calibration | Automotive Body Control Module |
|---|---|
Use Scenario: Storing factory-calibrated gain/offset values for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed once per power-on reset to initialize ADC reference points and linearization coefficients. Use Value: Enables field-replaceable sensor modules with unique calibration profiles stored per unit, eliminating manual trim pot adjustments. | Use Scenario: Holding door lock actuator timing profiles and seat position memory in vehicle body control units. IC Role / Device Role / Timing Role: Persistent parameter store updated only during service mode or user preference changes; retains values across battery disconnect events. Use Value: Supports personalized user settings and adaptive actuator behavior without requiring backup supercapacitors or secondary power rails. |
| Medical Device Configuration | Smart Energy Meter Firmware Patch Storage |
Use Scenario: Saving regulatory-compliant operational limits (e.g., maximum infusion rate, alarm thresholds) in portable infusion pumps. IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration vault accessed exclusively by certified firmware during startup validation. Use Value: Meets IEC 62304 safety requirements by isolating critical safety parameters from volatile RAM and main application flash. | Use Scenario: Storing minor firmware patches or tariff table updates in utility meters deployed in remote locations. IC Role / Device Role / Timing Role: Secondary nonvolatile storage for delta updates applied during scheduled over-the-air (OTA) maintenance windows. Use Value: Reduces main flash wear and avoids full firmware rewrites - extends meter lifetime beyond 15 years in field deployment. |
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 (8× larger capacity), 2.5–5.5V supply, 5 MHz clock, no ready/busy DO pin - uses WIP flag in status register. | Requires SPI peripheral and status register polling; better suited for high-throughput data logging but adds MCU driver complexity. | Select when >1K-bit storage is needed and SPI interface is already available; not drop-in due to protocol and pinout differences. |
| STK12C68-55LBI | 64 Kbit NVSRAM with parallel interface, 5V-only, built-in lithium backup; no serial interface or write endurance limit. | Used where byte-level random access and instant-write capability are mandatory - e.g., real-time data capture buffers. | Choose only if system requires true SRAM-like access speed and zero-write-delay persistence; incompatible pinout and voltage domain. |
Compared with AT93C46A-10SU-2.7-T, M95128-WMN6TP offers higher density and faster interface but lacks hardware-ready signaling, while STK12C68-55LBI provides instant-write NVSRAM functionality at the cost of serial simplicity, voltage flexibility, and package compatibility.
Availability
AT93C46A-10SU-2.7-T is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical device manufacturing requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for AT93C46A-10SU-2.7-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 a focus on reliability, longevity, and embedded system integration.
The AT93Cxx family was designed for low-pin-count, low-power serial configuration storage in resource-constrained embedded systems - emphasizing robustness, ease of integration, and extended data retention over raw speed or density.
FAQ
What is the maximum clock frequency supported by AT93C46A-10SU-2.7-T?
The AT93C46A-10SU-2.7-T supports up to 2 MHz SK clock frequency at VCC = 5.0V. At lower supply voltages (2.7V–4.5V), the maximum clock rate drops to 1 MHz, and at 1.8V operation it is limited to 0.25 MHz. These values are specified in Table 4 of the official datasheet and reflect guaranteed timing margins across temperature and voltage ranges.
Does AT93C46A-10SU-2.7-T require an external erase cycle before writing?
No, AT93C46A-10SU-2.7-T does not require a separate erase cycle before writing. Each WRITE instruction automatically erases the target location prior to programming, and the entire operation is self-timed. The device only permits writes after successful execution of the EWEN (Erase/Write Enable) instruction, which must be issued first to exit the default EWDS (Erase/Write Disable) state.
What is the function of the DC pin on AT93C46A-10SU-2.7-T?
The DC pin on AT93C46A-10SU-2.7-T is a factory-bonded device configuration terminal used internally during wafer testing and trimming. It is not intended for user connection, has no defined electrical behavior in normal operation, and must remain unconnected on the PCB to prevent interference with internal logic states or ESD susceptibility.
Can AT93C46A-10SU-2.7-T operate reliably at 1.8V?
No, AT93C46A-10SU-2.7-T is specifically rated for 2.7V to 5.5V operation. While the AT93C46A family includes −1.8 variants (e.g., AT93C46A-10SU-1.8), the −2.7 suffix denotes the 2.7V minimum version. Attempting to operate AT93C46A-10SU-2.7-T below 2.7V may result in undefined behavior, failed writes, or incomplete instruction decoding per datasheet Section "Ordering Information".
How is ready/busy status reported during a write cycle on AT93C46A-10SU-2.7-T?
During a write cycle, AT93C46A-10SU-2.7-T reports ready/busy status on the DO pin: if CS is brought high after tCS (≥250 ns), DO outputs logic '0' while programming is active and transitions to logic '1' upon completion. This status is valid only if CS is raised within the self-timed write window (tWP ≤ 10 ms); raising CS after tWP expires yields indeterminate DO output.
AT93C46A-10SU-2.7-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:
- 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-T FAQ
1.How can I place an order for AT93C46A-10SU-2.7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46A-10SU-2.7-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 AT93C46A-10SU-2.7-T reliable?
The price and inventory of AT93C46A-10SU-2.7-T 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-T is usually 5 days.
3.What payment methods are accepted for AT93C46A-10SU-2.7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46A-10SU-2.7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46A-10SU-2.7-T?
AT93C46A-10SU-2.7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46A-10SU-2.7-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 AT93C46A-10SU-2.7-T?
For technical support, including AT93C46A-10SU-2.7-T 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-T requirements.
6.How does Aetrix verify that AT93C46A-10SU-2.7-T is sourced from the original manufacturer or authorized distributors?
All AT93C46A-10SU-2.7-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 AT93C46A-10SU-2.7-T meets industry standards.
7.What is the process for return or replacement of AT93C46A-10SU-2.7-T?
All AT93C46A-10SU-2.7-T units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46A-10SU-2.7-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 AT93C46A-10SU-2.7-T part is unused and in its original packaging.
Return procedure for AT93C46A-10SU-2.7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT93C46A-10SU-2.7-T Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
