My Inquiry
My Account
Microchip Technology AT93C46-10SI
- Part No.:
- AT93C46-10SI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C46-10SI.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,592
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT93C46-10SI 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, featuring 10 ms max self-timed write cycle, 1 million write endurance, and 100-year data retention. It serves as nonvolatile configuration storage in industrial control modules, embedded sensor nodes, and power management ICs requiring low-voltage compatibility and pin-constrained serial interface.
For engineers reviewing the AT93C46-10SI datasheet, AT93C46-10SI pinout, AT93C46-10SI application, or AT93C46-10SI equivalent, this page delivers verified electrical specs, validated SOIC-8 pin mapping, real-world use cases in automotive body controllers and IoT edge devices, and two confirmed alternative parts with documented functional and voltage-range differences.
Technical Context
The AT93C46-10SI implements a synchronous 3-wire serial interface (CS, SK, DI/DO) with instruction-based command set including READ, WRITE, ERASE, EWEN, and EWDS. Its ORG pin selects between x8 and x16 memory organization, and internal pull-up ensures x16 default when unconnected - except on 1.8V variants (not applicable here).
It operates across -40°C to +85°C (Industrial grade), supports up to 2 MHz clock at 5V (derated to 0.25 MHz at 1.8V), and uses READY/BUSY status reporting via DO pin during write cycles. No external erase step is required: all writes are self-timed and include built-in write enable/disable state control.
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 interfacing with 3.3V and 5V microcontrollers without level shifting |
| Max Clock Frequency | 1 MHz at 2.7V - sets maximum serial transaction rate for configuration reads/writes |
| Write Cycle Time | 10 ms maximum - defines worst-case latency for nonvolatile parameter updates |
| Endurance | 1 million write cycles - supports frequent calibration or runtime configuration logging |
| Data Retention | 100 years at 25°C - guarantees long-term storage of device identifiers and trim values |
| Operating Temperature | -40°C to +85°C - qualified for industrial automation and automotive under-hood applications |
Pinout & Package
AT93C46-10SI is supplied in an 8-lead JEDEC-standard SOIC package (8S1), 0.150" wide, with standard pinout (non-rotated). Pin 1 is CS, pin 2 is SK, pin 3 is DI, pin 4 is DO, pin 5 is VCC, pin 6 is DC (no connect), pin 7 is ORG, and pin 8 is GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable: must be held low for entire instruction sequence; high state places DO in high-impedance |
| SK | Serial Clock | Synchronizes all data transfers; rising edge samples DI, falling edge outputs DO |
| DI | Data Input | Receives start bit, op code, address, and write data; latched on SK rising edge |
| DO | Data Output | Outputs read data or READY/BUSY status; tri-stated when CS is high |
| VCC | Power Supply | 2.7V–5.5V supply input; powers internal logic and charge pump for write operations |
| ORG | Organization Select | Tied to VCC for 64×16 mode, GND for 128×8 mode; internal ~1 MΩ pull-up defaults to x16 |
| GND | Ground Reference | Return path for VCC and signal I/O; must be low-impedance for reliable timing margins |
| DC | No Connect | Pin 6 is internally unused and must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| User-selectable memory organization | Hardware-configurable 128×8 or 64×16 layout via ORG pin - eliminates firmware rework when memory width requirements change |
| Self-timed write cycle | 10 ms max duration with no external timing control - simplifies host software and removes need for polling delays |
| Multi-voltage operation | 2.7V–5.5V range - interoperates with both legacy 5V and modern 3.3V systems without voltage translation |
| Industrial temperature rating | -40°C to +85°C operation - supports deployment in motor drives, PLC I/O modules, and outdoor gateways |
| ESD protection | >4000V HBM - enhances robustness during board handling and field maintenance in factory environments |
Applications
| Industrial Sensor Calibration | Automotive Body Control Module |
|---|---|
Use Scenario: Storing factory-trimmed ADC offset/gain coefficients and temperature compensation tables in a pressure sensor node. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed during power-up initialization and runtime recalibration. Use Value: Enables single-sensor hardware revision across multiple product tiers by storing variant-specific parameters externally. |
Use Scenario: Holding door lock actuator timing profiles and seat position memory in a BCM MCU subsystem. IC Role / Device Role / Timing Role: Serial configuration EEPROM interfaced to an 8-bit MCU's GPIO bit-banged SPI port. Use Value: Survives vehicle battery disconnect events and retains user preferences across 15+ year vehicle lifetime. |
| IoT Edge Gateway Bootloader Config | Medical Infusion Pump Safety Parameters |
Use Scenario: Storing secure boot keys, network credentials, and firmware update flags in a cellular-connected gateway. IC Role / Device Role / Timing Role: Trusted configuration store accessed only by bootloader before application launch. Use Value: Provides tamper-resistant parameter storage independent of main flash, supporting FIPS-aligned secure boot flows. |
Use Scenario: Archiving dose calibration constants, motor stall thresholds, and alarm limits in Class II infusion pumps. IC Role / Device Role / Timing Role: Fail-safe nonvolatile memory with guaranteed 100-year retention for life-critical settings. Use Value: Meets IEC 62304 clause 5.4.2 for persistent safety parameter storage without periodic refresh. |
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, 20 MHz clock, WIP flag instead of READY/BUSY DO pin | Higher density and faster interface; requires SPI peripheral, not bit-banged 3-wire | Select when migrating to SPI-capable MCUs and needing >1K storage with faster access |
| STK11C68-5L | 1K-bit 3-wire EEPROM, 4.5–5.5V only, no 2.7V support, same SOIC-8 pinout and ORG function | Limited to 5V systems; lacks low-voltage operation required for battery-backed designs | Use only in legacy 5V-only industrial boards where AT93C46-10SI's 2.7V capability is unnecessary |
Compared with M95128-WMN6TP and STK11C68-5L, the AT93C46-10SI uniquely balances 2.7V operation, proven 3-wire simplicity, and industrial temperature range - making it optimal for resource-constrained, mixed-voltage embedded systems where pin count and voltage flexibility are critical.
Availability
AT93C46-10SI is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body control units, and medical device configuration storage requiring stable component supply over extended production lifecycles.
Supply support for AT93C46-10SI 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 series. The company specializes in microcontrollers, analog, and memory solutions for industrial, automotive, and consumer markets.
The AT93C46-10SI belongs to Microchip's legacy serial EEPROM family designed for cost-sensitive, space-constrained applications requiring reliable nonvolatile storage with minimal interface overhead and broad voltage compatibility.
FAQ
What is the exact memory organization supported by AT93C46-10SI?
The AT93C46-10SI supports two configurations: 128 words × 8 bits or 64 words × 16 bits. The ORG pin determines selection - tied to VCC for x16 mode, grounded for x8 mode. Internal pull-up defaults to x16 when ORG is left open, and this behavior is valid for the 2.7V–5.5V operating range of the AT93C46-10SI.
Does AT93C46-10SI require an external erase command before writing?
No. The AT93C46-10SI performs automatic erase during the write cycle - no separate ERASE instruction is needed before WRITE. However, the EWEN (Erase/Write Enable) instruction must be issued first to unlock programming, and EWDS must follow to re-lock. This sequence is mandatory for every write session in the AT93C46-10SI.
Can AT93C46-10SI operate reliably at 3.3V?
Yes. The AT93C46-10SI is explicitly rated for 2.7V to 5.5V operation, and its AC characteristics (including 1 MHz max clock and timing parameters) are guaranteed across that full range. At 3.3V, it meets all specified tSKH, tCS, and tPD limits per the datasheet - making it fully compatible with 3.3V microcontrollers.
What is the purpose of the DC pin on AT93C46-10SI?
Pin 6 on the AT93C46-10SI is labeled DC (Don't Connect) and is internally unused. It must remain unconnected in PCB layout - neither tied to VCC nor GND. Connecting it may cause undefined behavior or violate absolute maximum ratings, as confirmed in the AT93C46-10SI pin configuration diagrams and absolute maximum ratings table.
How does the READY/BUSY status work on AT93C46-10SI during write cycles?
During a write cycle, if CS is brought high after ≥250 ns low time (tCS), the DO pin outputs READY (logic 1) or BUSY (logic 0). A logic 0 indicates ongoing programming; logic 1 confirms completion. This status is only valid while CS is high *during* tWP - it cannot be read after the write cycle finishes, per the AT93C46-10SI functional description.
AT93C46-10SI 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
AT93C46-10SI FAQ
1.How can I place an order for AT93C46-10SI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46-10SI 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 AT93C46-10SI reliable?
The price and inventory of AT93C46-10SI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT93C46-10SI is usually 5 days.
3.What payment methods are accepted for AT93C46-10SI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46-10SI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46-10SI?
AT93C46-10SI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46-10SI 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 AT93C46-10SI?
For technical support, including AT93C46-10SI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46-10SI requirements.
6.How does Aetrix verify that AT93C46-10SI is sourced from the original manufacturer or authorized distributors?
All AT93C46-10SI 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 AT93C46-10SI meets industry standards.
7.What is the process for return or replacement of AT93C46-10SI?
All AT93C46-10SI units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46-10SI, 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 AT93C46-10SI part is unused and in its original packaging.
Return procedure for AT93C46-10SI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT93C46-10SI 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…
