My Inquiry
My Account
Microchip Technology 93AA46CXT-I/SN
- Part No.:
- 93AA46CXT-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93AA46CXT-I/SN.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,053
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
93AA46CXT-I/SN from Microchip Technology is a 1 Kbit low-voltage serial EEPROM with Microwire-compatible 3-wire interface, ORG-pin-selectable 8-/16-bit word organization, 1.8–5.5 V supply range, and industrial temperature rating (–40°C to +85°C). It delivers self-timed erase/write cycles, automatic ERAL/WRAL support, and 1 million endurance cycles for nonvolatile storage in microcontroller peripherals and power management systems.
For engineers reviewing the 93AA46CXT-I/SN datasheet, 93AA46CXT-I/SN pinout, 93AA46CXT-I/SN application, or 93AA46CXT-I/SN equivalent, key selection criteria include ORG-pin configuration flexibility, 3-wire timing compliance at 1.8 V, Ready/Busy status signaling via DO, and Pb-free SOIC-8 packaging suitable for space-constrained embedded designs.
Technical Context
The 93AA46CXT-I/SN implements a synchronous serial Microwire protocol with CS/CLK/DI/DO signals and an ORG input that determines memory mapping: logic high selects 64 × 16-bit (x16), logic low selects 128 × 8-bit (x8) organization. All instructions-including READ, WRITE, ERASE, ERAL, WRAL, EWEN, and EWDS-are clocked on CLK rising edges with defined setup/hold times.
It features internal power-on reset detection (VPOR = 1.5 V typical), automatic erase-before-write, and hardware-level data protection: write operations require explicit EWEN command, and device defaults to EWDS mode at power-up. The DO pin serves dual function-data output during READ and Ready/Busy status indicator during programming-with High-Z state maintained when CS is low or no operation is active.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Kbit (128 × 8-bit or 64 × 16-bit, selectable via ORG pin) |
| Supply Voltage | 1.8 V to 5.5 V - supports direct interfacing with 1.8 V, 2.5 V, 3.3 V, and 5 V logic domains |
| Clock Frequency | Up to 3 MHz at VCC ≥ 4.5 V - enables fast configuration loading without external wait states |
| Endurance | 1,000,000 erase/write cycles - ensures long-term reliability in firmware parameter logging |
| Data Retention | Greater than 200 years at 25°C - guarantees nonvolatile storage integrity across product lifecycle |
| Operating Temp | –40°C to +85°C (Industrial grade) - validated for use in automotive body control and industrial HMI modules |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - minimal GPIO usage, compatible with legacy MCU peripheral drivers |
Pinout & Package
93AA46CXT-I/SN is packaged in 8-lead SOIC (SN) with Pb-free Matte Tin finish. Pin 1 is marked by laser dot; package dimensions conform to JEDEC MS-012AA standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable signal; must be held low ≥250 ns between instructions to reset internal logic |
| CLK | Serial Clock | Synchronizes all data transfers on rising edge; stoppable at any point without corruption |
| DI | Data Input | Accepts Start bit, opcodes, addresses, and write data; tolerant of bus conflict when shared with DO |
| DO | Data Output / Status | Outputs read data or Ready/Busy flag (low = busy); enters High-Z when CS is low or no operation active |
| VSS | Ground | Reference for all I/O and internal circuitry; requires low-impedance connection to system ground plane |
| ORG | Organization Select | Logic high → 64×16-bit mode; logic low → 128×8-bit mode; must be externally biased to valid level |
| NC | No Internal Connection | Pin 7 has no die bond; may be left floating or tied to ground for mechanical stability |
| VCC | Power Supply | Supplies core and I/O circuitry; includes internal POR detection at ~1.5 V to prevent spurious writes during brownout |
Key Features
| Feature | Design Value |
|---|---|
| ORG-pin word-size selection | Enables single BOM part to serve both 8-bit and 16-bit host interfaces without redesign |
| Self-timed erase/write cycles | Eliminates need for external timing control or software delays - reduces firmware overhead |
| Automatic ERAL before WRAL | Guarantees full-array write success without requiring separate erase command in initialization sequence |
| Ready/Busy status on DO | Allows polling-based flow control instead of fixed delay loops - improves system responsiveness |
| Power-on/off data protection | Hardware lockout below 1.5 V prevents corruption during power ramp-up/down transitions |
Applications
| Motor Control Configuration Storage | Smart Sensor Calibration Data |
|---|---|
Use Scenario: Storing motor phase timing offsets, current limits, and PID coefficients in BLDC driver modules. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed during boot and runtime via SPI-like Microwire interface. Use Value: Enables field-upgradable motor profiles without reprogramming MCU flash; ORG pin allows reuse across 8-bit and 16-bit controller platforms. | Use Scenario: Holding factory-trimmed gain/offset values and temperature compensation tables for MEMS pressure sensors. IC Role / Device Role / Timing Role: Dedicated calibration memory mapped to sensor ASIC via dedicated CS line. Use Value: Eliminates need for OTP fuses or MCU flash partitioning; 200-year retention ensures accuracy over equipment service life. |
| Industrial PLC I/O Module Settings | USB-to-Serial Bridge Configuration |
Use Scenario: Saving channel enable/disable states, scaling factors, and alarm thresholds in modular I/O terminals. IC Role / Device Role / Timing Role: System-level configuration store accessed by ARM Cortex-M host during initialization. Use Value: Supports hot-swap module identification and parameter persistence across power cycles; 1.8 V compatibility enables direct interface with low-power PMIC rails. | Use Scenario: Storing VID/PID, UART baud rate presets, and GPIO mapping for FTDI-compatible bridge ICs. IC Role / Device Role / Timing Role: Boot-time configuration source for USB enumeration and serial interface setup. Use Value: Allows single hardware design to support multiple end-product SKUs via EEPROM-programmed identifiers; WRAL simplifies factory provisioning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC46CXT-I/SN | Same pinout and ORG functionality, but 2.5–5.5 V VCC range - lacks 1.8 V operation | Not suitable for 1.8 V systems; otherwise identical instruction set and timing | Select when higher minimum VCC aligns with system rail constraints and 1.8 V operation is unnecessary |
| AT25010B-MAHL-T | SPI interface (4-wire), no ORG pin, 1.8–5.5 V, 1 Kbit capacity - different protocol and pin count | Requires SPI-capable MCU peripheral; no word-size flexibility; uses separate SO and WP pins | Choose when SPI-native interface is preferred and ORG configurability is not required |
Compared with 93LC46CXT-I/SN, the 93AA46CXT-I/SN extends low-voltage operation down to 1.8 V while retaining identical package and ORG control; versus AT25010B-MAHL-T, it offers Microwire compatibility and hardware word-size selection at the cost of SPI-standardization and write-protection pin separation.
Availability
93AA46CXT-I/SN is available at Aetrix Electronics and suitable for motor control configuration storage, smart sensor calibration data, and industrial PLC I/O module settings requiring stable component supply across extended temperature ranges and multi-voltage designs.
Supply support for 93AA46CXT-I/SN 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 Inc. is a leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona.
The 93AA46CXT-I/SN belongs to Microchip's legacy 93XX serial EEPROM family, designed specifically for low-power, pin-efficient nonvolatile storage in resource-constrained embedded systems where Microwire protocol compatibility and flexible word organization are critical.
FAQ
What is the function of the ORG pin on the 93AA46CXT-I/SN?
The ORG pin on the 93AA46CXT-I/SN selects memory organization: logic high configures 64 × 16-bit (x16) mode, logic low configures 128 × 8-bit (x8) mode. This allows a single 93AA46CXT-I/SN part to interface with either 8-bit or 16-bit host controllers without hardware change. The pin must be externally biased to a valid logic level (VCC or VSS); floating is not permitted. This feature is unique to 'C' variants like the 93AA46CXT-I/SN and absent in 'A' or 'B' versions.
Does the 93AA46CXT-I/SN support true 3-wire SPI communication?
No, the 93AA46CXT-I/SN implements Microwire protocol-not SPI. While both use CS/CLK/DI/DO signals, Microwire requires strict start-bit detection (CS and DI high on first CLK rising edge), prohibits bidirectional data sharing without external resistor mitigation, and defines distinct instruction opcodes and timing windows. The 93AA46CXT-I/SN does not support SPI modes (CPOL/CPHA), daisy-chaining, or 4-wire full-duplex operation. Its interface is electrically and logically optimized for Microwire-compliant MCUs.
How does the Ready/Busy status work on the 93AA46CXT-I/SN?
The 93AA46CXT-I/SN asserts Ready/Busy status on the DO pin during erase/write operations: DO = low indicates ongoing programming, DO = high indicates completion. To read status, CS must be brought high for ≥250 ns after TCSL, then sampled on CLK rising edges. DO returns to High-Z when CS is low or after status is cleared by issuing a Start bit followed by CS low. This polling mechanism eliminates fixed-delay loops and enables deterministic timing control in real-time systems using the 93AA46CXT-I/SN.
What is the minimum VCC required for reliable operation of the 93AA46CXT-I/SN?
The 93AA46CXT-I/SN requires a minimum VCC of 1.8 V for guaranteed functional operation across the full industrial temperature range (–40°C to +85°C). Below 1.8 V, internal power-on reset (VPOR ≈ 1.5 V) disables all write functions to prevent data corruption. At 1.8 V, maximum clock frequency is 1 MHz per AC specifications; performance scales with voltage up to 3 MHz at VCC ≥ 4.5 V. This wide 1.8–5.5 V range makes the 93AA46CXT-I/SN suitable for mixed-voltage systems without level-shifting.
Can the 93AA46CXT-I/SN be used in automotive applications?
The 93AA46CXT-I/SN is rated for Industrial temperature (–40°C to +85°C), not Automotive (–40°C to +125°C). While its electrical specs meet many automotive subsystem requirements (e.g., engine bay sensors operate below 85°C), it lacks AEC-Q100 qualification and the extended high-temperature endurance validation required for under-hood deployment. For automotive-grade alternatives, consider the 93LC46CXT-E/SN or 93C46CXT-E/SN, which are explicitly qualified for E-temp operation and specified up to +125°C. The 93AA46CXT-I/SN remains appropriate for cabin electronics, infotainment, and ADAS modules operating within industrial thermal limits.
93AA46CXT-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Kbit
- Memory Organization:
- 128 x 8, 64 x 16
- Memory Interface:
- Microwire
- Clock Frequency:
- 3 MHz
- Write Cycle Time - Word, Page:
- 6ms
- 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
93AA46CXT-I/SN FAQ
1.How can I place an order for 93AA46CXT-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA46CXT-I/SN 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 93AA46CXT-I/SN reliable?
The price and inventory of 93AA46CXT-I/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93AA46CXT-I/SN is usually 5 days.
3.What payment methods are accepted for 93AA46CXT-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA46CXT-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA46CXT-I/SN?
93AA46CXT-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA46CXT-I/SN 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 93AA46CXT-I/SN?
For technical support, including 93AA46CXT-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA46CXT-I/SN requirements.
6.How does Aetrix verify that 93AA46CXT-I/SN is sourced from the original manufacturer or authorized distributors?
All 93AA46CXT-I/SN 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 93AA46CXT-I/SN meets industry standards.
7.What is the process for return or replacement of 93AA46CXT-I/SN?
All 93AA46CXT-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93AA46CXT-I/SN, 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 93AA46CXT-I/SN part is unused and in its original packaging.
Return procedure for 93AA46CXT-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93AA46CXT-I/SN 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…
