My Inquiry
My Account
Microchip Technology AT93C46A-10SI-2.7-T
- Part No.:
- AT93C46A-10SI-2.7-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C46A-10SI-2.7-T.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,982
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT93C46A-10SI-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, supporting up to 2 MHz clock rate at 5V, 1 million write cycles endurance, and 100-year data retention. It serves as nonvolatile configuration storage in industrial control modules, automotive body electronics, and embedded sensor nodes requiring low-voltage reliability.
For engineers reviewing the AT93C46A-10SI-2.7-T datasheet, AT93C46A-10SI-2.7-T pinout, AT93C46A-10SI-2.7-T application, or AT93C46A-10SI-2.7-T equivalent, this page delivers verified electrical specs, JEDEC SOIC-8 package details, functional instruction set behavior, real-world use cases, and two validated alternative parts for design continuity.
Technical Context
The AT93C46A-10SI-2.7-T implements a synchronous three-wire serial interface (CS/SK/DI/DO) with start-bit–driven command decoding, supporting seven instructions including READ, WRITE, ERASE, EWEN, EWDS, ERAL, and WRAL. Its memory array is organized as 64 words of 16 bits each, with no separate erase cycle required prior to write.
Write operations are fully self-timed (tWP ≤ 10 ms), and ready/busy status is reported via DO when CS is asserted high during programming. The device enters Erase/Write Disable (EWDS) state on power-up and requires explicit EWEN instruction before enabling any programming mode - ensuring data integrity in noisy or unstable supply environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (64 × 16-bit words) - sufficient for storing calibration coefficients, device IDs, or small firmware patches. |
| Supply Voltage Range | 2.7V to 5.5V - enables direct interfacing with 3.3V and 5V microcontrollers without level-shifting. |
| Clock Frequency | Up to 2 MHz at VCC = 5V - supports fast configuration loading in time-critical boot sequences. |
| Write Endurance | 1 million cycles - suitable for field-updatable parameters that change daily over 27 years. |
| Data Retention | 100 years at +25°C - guarantees long-term storage of factory-set values across product lifecycle. |
| Operating Temperature | −40°C to +85°C - qualified for industrial and automotive under-hood applications. |
| Interface Protocol | Three-wire serial (CS/SK/DI/DO) - reduces PCB routing complexity versus SPI or I²C, with minimal GPIO usage. |
Pinout & Package
AT93C46A-10SI-2.7-T is housed in an 8-lead JEDEC-standard SOIC package (package code 8S1), measuring 5.0 mm × 4.0 mm × 1.5 mm, with gull-wing leads and 1.27 mm pitch. This RoHS-compliant, lead-free/halogen-free package supports reflow soldering and meets industrial thermal cycling requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must be held low for entire instruction sequence; determines device activation window. |
| SK | Serial Clock | Synchronous timing reference for all data transfers; rising edge samples DI and clocks DO. |
| DI | Data Input | Serial command and address input path; accepts start bit + opcode + address + data per instruction. |
| DO | Data Output | Serial read-data output and ready/busy status indicator; high = ready, low = busy during write/erase. |
| GND | Ground Reference | Return path for all internal logic and I/O; must be connected to system ground plane for noise immunity. |
| VCC | Power Supply | Primary supply rail; decoupling capacitor (0.1 µF) required within 10 mm for stable operation. |
| DC | Device Configuration | Internally tied; used during factory test; no external connection required in application circuit. |
| NC | No Connect | Unbonded pin; must remain floating or grounded per layout best practice to avoid parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed write cycle | Eliminates need for external timing control or polling delay loops - simplifies firmware driver implementation. |
| Erase/write enable/disable protocol | Prevents accidental writes via mandatory EWEN/EWDS handshake - critical for safety-critical or remote-deployed systems. |
| Dual voltage support (2.7V/1.8V variants) | Same pinout and instruction set across voltage grades - enables single PCB design supporting multiple supply domains. |
| Ready/busy status reporting | Real-time feedback via DO pin during programming - allows host to pause other tasks instead of fixed delays. |
| Automotive-grade qualification | Validated for extended temperature and AEC-Q200 stress tests - suitable for body control modules and infotainment subsystems. |
Applications
| Industrial PLC Configuration Storage | Automotive Door Module Calibration |
|---|---|
Use Scenario: Storing I/O mapping tables and user-defined logic parameters in programmable logic controllers deployed in factory automation lines. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding runtime-modifiable settings; accessed during startup and maintenance mode. Use Value: Enables field reconfiguration without firmware update; 1M endurance supports weekly parameter tuning over 27+ years. | Use Scenario: Retaining mirror position offsets, window auto-reverse thresholds, and keyless entry pairing codes in vehicle door control units. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for safety-critical calibration data; accessed only during initialization or service mode. Use Value: Meets automotive data retention and temperature stability requirements; eliminates recalibration after battery disconnect. |
| Medical Sensor Node ID Storage | Smart Meter Firmware Patch Log |
Use Scenario: Holding unique device identifiers, sensor calibration constants, and regulatory compliance flags in portable diagnostic sensors. IC Role / Device Role / Timing Role: Trusted identity anchor; read at power-on to establish secure boot chain and authenticate firmware signature. Use Value: 100-year retention ensures lifetime traceability; low-voltage operation extends battery life in coin-cell–powered devices. | Use Scenario: Logging successful firmware patch versions and rollback checkpoints in utility-grade electricity meters operating unattended for 15+ years. IC Role / Device Role / Timing Role: Immutable audit trail storage; written once per update, read during boot validation and diagnostics. Use Value: Prevents bricking due to failed updates; 1M write cycles accommodate 3 patches/year for >300 years of field service. |
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-only supply (4.5–5.5V), 5 MHz max clock, 400 µA active current | Requires SPI master with full-duplex capability; not pin-compatible; higher density but less flexible voltage range | Select when migrating to SPI-based platforms and needing larger storage; requires PCB redesign and driver rewrite. |
| CAT93C46VI-GT3 | Same 1K-bit × 16 organization, 2.5–5.5V supply, 3-wire interface, identical SOIC-8 pinout, but rated for −40°C to +105°C | Direct functional replacement with extended high-temp rating; same instruction set and timing | Preferred for new designs targeting extended temperature range; drop-in substitute if board layout matches SOIC-8 footprint. |
Compared with AT93C46A-10SI-2.7-T, M95128-WMN6TP offers higher density and speed but demands SPI infrastructure changes, while CAT93C46VI-GT3 provides identical functionality with broader temperature tolerance - making it the most seamless upgrade path for industrial deployments.
Availability
AT93C46A-10SI-2.7-T is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, and medical sensor nodes requiring stable component supply, long-lifecycle support, and guaranteed RoHS compliance.
Supply support for AT93C46A-10SI-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 broad industrial and automotive qualification expertise.
The AT93C46A-10SI-2.7-T belongs to Microchip's legacy Atmel serial EEPROM family, designed specifically for space-constrained, low-power embedded systems requiring robust, pin-efficient nonvolatile storage.
FAQ
What is the maximum clock frequency supported by the AT93C46A-10SI-2.7-T at 3.3V operation?
The AT93C46A-10SI-2.7-T supports up to 1 MHz SK clock frequency when operated at 2.7V–3.6V (per Table 4 AC Characteristics). At 3.3V, the device meets all timing specifications with tSKH/tSKL ≥ 250 ns, enabling reliable communication with standard 3.3V microcontrollers without derating.
Does the AT93C46A-10SI-2.7-T require an external pull-up resistor on the DO pin?
No, the AT93C46A-10SI-2.7-T features an internally weak-pull-up on the DO pin during read operations and open-drain ready/busy signaling during write cycles. External pull-up is unnecessary unless driving long traces (>10 cm) or multiple loads - in which case a 10 kΩ resistor to VCC is recommended.
Can the AT93C46A-10SI-2.7-T be used in place of the AT93C46A-10PI-2.7 in a PDIP-based design?
No - the AT93C46A-10SI-2.7-T uses an 8-lead JEDEC SOIC package (8S1), while AT93C46A-10PI-2.7 uses an 8-lead PDIP (8P3). They share identical electrical specs and instruction set, but mechanical incompatibility prevents direct substitution without PCB revision.
What happens if the AT93C46A-10SI-2.7-T receives a WRITE instruction without prior EWEN execution?
The AT93C46A-10SI-2.7-T ignores the WRITE instruction and maintains current memory contents. The device remains in Erase/Write Disable (EWDS) state after power-up until EWEN is issued; this hardware-enforced lock prevents accidental writes during brown-out or reset conditions.
Is the AT93C46A-10SI-2.7-T compatible with 1.8V microcontrollers?
No - the AT93C46A-10SI-2.7-T is the 2.7V–5.5V variant. For 1.8V operation, use AT93C46A-10SI-1.8, which has different input threshold voltages (VIL2/VIH2) and is characterized down to 1.8V. Mixing variants risks read/write failures due to incompatible logic levels.
AT93C46A-10SI-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-10SI-2.7-T FAQ
1.How can I place an order for AT93C46A-10SI-2.7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46A-10SI-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-10SI-2.7-T reliable?
The price and inventory of AT93C46A-10SI-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-10SI-2.7-T is usually 5 days.
3.What payment methods are accepted for AT93C46A-10SI-2.7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46A-10SI-2.7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46A-10SI-2.7-T?
AT93C46A-10SI-2.7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46A-10SI-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-10SI-2.7-T?
For technical support, including AT93C46A-10SI-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-10SI-2.7-T requirements.
6.How does Aetrix verify that AT93C46A-10SI-2.7-T is sourced from the original manufacturer or authorized distributors?
All AT93C46A-10SI-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-10SI-2.7-T meets industry standards.
7.What is the process for return or replacement of AT93C46A-10SI-2.7-T?
All AT93C46A-10SI-2.7-T units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46A-10SI-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-10SI-2.7-T part is unused and in its original packaging.
Return procedure for AT93C46A-10SI-2.7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT93C46A-10SI-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…
