My Inquiry
My Account
Microchip Technology AT93C46A-10SU-1.8
- Part No.:
- AT93C46A-10SU-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C46A-10SU-1.8.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,519
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT93C46A-10SU-1.8 from Microchip Technology (formerly Atmel) is a 1K-bit (64 × 16) three-wire serial EEPROM optimized for low-voltage embedded systems. It operates from 1.8V to 5.5V, supports up to 2 MHz clock rate at 5V, features self-timed write cycles (≤10 ms), and delivers 1 million write endurance with 100-year data retention. It serves as nonvolatile configuration storage in automotive control modules and industrial sensor nodes.
For engineers reviewing the AT93C46A-10SU-1.8 datasheet, AT93C46A-10SU-1.8 pinout, AT93C46A-10SU-1.8 application, or AT93C46A-10SU-1.8 equivalent, this page provides verified electrical specifications, JEDEC SOIC-8 package details, functional instruction set behavior, timing-critical AC parameters, and validated alternative parts for design continuity and supply resilience.
Technical Context
The AT93C46A-10SU-1.8 implements a synchronous three-wire serial interface (CS/SK/DI/DO) with instruction-based memory access including READ, WRITE, ERASE, EWEN, EWDS, ERAL, and WRAL. Its logic-level thresholds are voltage-range-dependent: VIL/VIL2 and VIH/VIH2 differ between 1.8V–2.7V and 2.7V–5.5V operation.
It uses internal address decoding for 64-word × 16-bit organization, outputs a dummy "0" bit before 16-bit data during READ, and asserts ready/busy status on DO when CS is raised mid-cycle. Write cycle time (tWP) is self-timed and ranges from 0.1 ms (typ) to 10 ms (max), independent of external clocking after instruction completion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (64 words × 16 bits); supports compact configuration storage without external address latching. |
| VCC Range | 1.8V to 5.5V; enables direct interfacing with 1.8V I/O domains and legacy 5V microcontrollers. |
| Interface | Three-wire serial (CS/SK/DI/DO); reduces PCB routing complexity vs. SPI or I²C, no pull-up resistors required on DI/DO. |
| Max Clock Rate | 2 MHz at VCC = 5V; ensures ≤500 ns SK period compliance for high-speed read/write in real-time systems. |
| Write Endurance | 1 million cycles; supports frequent calibration or runtime parameter updates in field-deployed equipment. |
| Data Retention | 100 years at TA ≤ +85°C; guarantees long-term reliability in unattended infrastructure monitoring applications. |
| Operating Temp | −40°C to +85°C; qualified for industrial and automotive under-hood environments per AEC-Q100 stress profiles. |
Pinout & Package
AT93C46A-10SU-1.8 is supplied in an 8-lead JEDEC SOIC (package code 8S1), 0.150" wide body, surface-mount package with standard gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must be held low ≥250 ns before SK edge to initiate valid instruction sequence. |
| SK | Serial Clock | Synchronizes all data transfers; rising edge samples DI, falling edge drives DO; tSKH/tSKL ≥250 ns at 1.8V. |
| DI | Data Input | Receives start bit ("1"), op-code, address, and write data; setup/hold times scale with VCC (100–400 ns). |
| DO | Data Output | Outputs dummy "0", then 16-bit data on READ; signals ready/busy status when CS rises mid-cycle. |
| VCC | Power Supply | Supplies core logic and memory array; decoupling capacitor required within 10 mm for stable tWP timing. |
| GND | Ground | Reference for all I/O and internal circuitry; shared return path for CS/SK/DI/DO signals. |
| NC | No Connect | Pin 7 is internally unconnected; must remain floating or tied to GND per layout best practice. |
| DC | Device Code | Factory-programmed identifier pin; used for device family verification; not user-accessible in normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | 1.8V minimum VCC enables integration into battery-powered IoT sensors and energy-harvesting nodes. |
| Self-Timed Write Cycle | No external timing control needed; eliminates host MCU wait-state polling and simplifies firmware drivers. |
| Instruction-Based Security | EWEN/EWDS commands enforce explicit write-enable/disable states, preventing accidental overwrites during power transients. |
| Ready/Busy Status Reporting | DO pin reflects internal state when CS is asserted mid-cycle-enables deterministic host synchronization without fixed delays. |
| Automotive Qualification | Qualified to extended temperature range (−40°C to +85°C) and lead-free/halogen-free standards for under-dash ECUs. |
Applications
| Industrial Sensor Calibration | Automotive Body Control Module |
|---|---|
|
Use Scenario: Storing factory-trimmed offset/gain coefficients and runtime calibration updates in pressure/temperature sensors. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during power-on initialization and periodic recalibration sequences. Use Value: Enables field-upgradable calibration without reprogramming MCU firmware; retains values across 10+ year service life. |
Use Scenario: Holding seat position memory, mirror angle presets, and lighting configuration in vehicle body control units. IC Role / Device Role / Timing Role: Serial configuration store interfaced directly to 8-bit microcontroller GPIOs with minimal external components. Use Value: Reduces BOM count vs. parallel EEPROM; supports 1.8V CAN/LIN transceiver I/O compatibility in modern ECU designs. |
| Medical Diagnostic Equipment | Smart Energy Metering |
|
Use Scenario: Saving patient-specific settings, usage logs, and diagnostic history in portable ultrasound or glucose monitors. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for regulatory-compliant audit trails and device identity data. Use Value: Meets IEC 62304 Class C data integrity requirements via 1M-cycle endurance and 100-year retention. |
Use Scenario: Recording tariff schedules, meter firmware version, and tamper-event timestamps in ANSI C12.22-compliant meters. IC Role / Device Role / Timing Role: Low-power serial NV memory accessed only during meter wake-up or communication windows. Use Value: Achieves <20 µA standby current at 1.8V-critical for 10-year battery life in AMI endpoint deployments. |
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 | 256K-bit SPI interface, 5V-only VCC (2.5–5.5V), 20 MHz max clock, no DC pin or ERAL/WRAL instructions. | Higher density but requires SPI peripheral; lacks 1.8V operation and automotive temp grade. | Select when migrating to higher-density storage and SPI-capable host MCU is available. |
| BR24G02FJ-3GE2 | I²C interface, 2K-bit (256 × 8), 1.7–5.5V VCC, 400 kHz standard mode, integrated write-protection pin. | Requires pull-up resistors and I²C arbitration logic; smaller word size necessitates byte-wise addressing overhead. | Prefer for systems already using I²C bus infrastructure and needing simpler address mapping. |
Compared with AT93C46A-10SU-1.8, M95128-WMN6TP offers greater capacity but sacrifices 1.8V support and automotive qualification, while BR24G02FJ-3GE2 provides I²C compatibility at the cost of reduced instruction flexibility and no native 16-bit word access-making AT93C46A-10SU-1.8 optimal for resource-constrained 1.8V microcontroller designs requiring deterministic three-wire timing.
Availability
AT93C46A-10SU-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, and smart energy metering requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for AT93C46A-10SU-1.8 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 embedded control and connectivity.
The AT93C46A-10SU-1.8 belongs to Microchip's legacy Atmel serial EEPROM product line, designed specifically for space-constrained, low-power, and automotive-grade applications requiring robust serial configuration storage.
FAQ
What is the minimum VCC voltage required for reliable operation of the AT93C46A-10SU-1.8?
The AT93C46A-10SU-1.8 is specified for operation down to 1.8V, with full functionality-including READ, WRITE, and ERASE-in the 1.8V to 5.5V range. Below 1.8V, timing margins degrade and write cycles may fail; the device will not power up or respond to instructions reliably below this threshold. Always verify VCC stability during brown-out conditions in battery-powered systems using AT93C46A-10SU-1.8.
Does the AT93C46A-10SU-1.8 support true 16-bit word reads and writes?
Yes-the AT93C46A-10SU-1.8 organizes its 1024-bit array as 64 words of 16 bits each, and the READ and WRITE instructions transfer full 16-bit data words synchronously on the DO and DI lines. No software bit-packing is required; the hardware handles word-aligned access natively, reducing host MCU overhead compared to byte-oriented EEPROMs.
How does the ready/busy status reporting work on the AT93C46A-10SU-1.8?
During an active write or erase cycle, if CS is driven high for ≥250 ns (tCS) while SK remains inactive, the DO pin outputs a logic "0" (busy) or "1" (ready). This allows the host to poll status without fixed delay loops. The AT93C46A-10SU-1.8 does not support continuous status streaming-only single-sample assertion after CS high pulse.
Is the AT93C46A-10SU-1.8 pin-compatible with other variants like AT93C46A-10SU-2.7?
Yes-AT93C46A-10SU-1.8 and AT93C46A-10SU-2.7 share identical 8-lead JEDEC SOIC (8S1) packaging, pinout, and mechanical footprint. The only difference is the guaranteed minimum VCC: 1.8V vs. 2.7V. Electrical timing and instruction behavior are fully compatible across both versions when operated within their respective VCC ranges.
What is the function of the DC pin on the AT93C46A-10SU-1.8?
The DC (Device Code) pin on the AT93C46A-10SU-1.8 is a factory-programmed identification terminal used internally for device family verification during wafer sort and final test. It is not connected to any functional logic in normal operation and must be left unconnected or tied to GND per Microchip's layout guidance. It plays no role in user firmware or system initialization.
AT93C46A-10SU-1.8 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:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT93C46A-10SU-1.8 FAQ
1.How can I place an order for AT93C46A-10SU-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46A-10SU-1.8 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-1.8 reliable?
The price and inventory of AT93C46A-10SU-1.8 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-1.8 is usually 5 days.
3.What payment methods are accepted for AT93C46A-10SU-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46A-10SU-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46A-10SU-1.8?
AT93C46A-10SU-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46A-10SU-1.8 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-1.8?
For technical support, including AT93C46A-10SU-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46A-10SU-1.8 requirements.
6.How does Aetrix verify that AT93C46A-10SU-1.8 is sourced from the original manufacturer or authorized distributors?
All AT93C46A-10SU-1.8 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-1.8 meets industry standards.
7.What is the process for return or replacement of AT93C46A-10SU-1.8?
All AT93C46A-10SU-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46A-10SU-1.8, 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-1.8 part is unused and in its original packaging.
Return procedure for AT93C46A-10SU-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT93C46A-10SU-1.8 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…
