My Inquiry
My Account
Microchip Technology 93LC46AXT-I/SN
- Part No.:
- 93LC46AXT-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC46AXT-I/SN.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,635
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
93LC46AXT-I/SN from Microchip Technology Inc. is a 1Kbit (128 × 8-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 2.5–5.5 V supply range, and industrial temperature rating (−40°C to +85°C). It features self-timed erase/write cycles, automatic ERAL before WRAL, power-on/off data protection, and Ready/Busy status signaling via DO pin - used for configuration storage in microcontroller-based embedded systems.
For engineers reviewing the 93LC46AXT-I/SN datasheet, 93LC46AXT-I/SN pinout, 93LC46AXT-I/SN application, or 93LC46AXT-I/SN equivalent, key selection criteria include voltage compatibility (2.5–5.5 V), 8-bit x128 organization (no ORG pin), SOIC-8 package footprint, 1 million erase/write endurance, and 200-year data retention - critical for long-life industrial firmware parameter storage.
Technical Context
The 93LC46AXT-I/SN implements a synchronous serial Microwire interface with CS, CLK, DI, and DO signals. It operates exclusively in fixed 8-bit organization ('A' variant), eliminating ORG pin dependency. All instructions - READ (18 clocks), WRITE (18 clocks), ERASE (10 clocks), ERAL (10 clocks), WRAL (18 clocks) - are initiated by a Start bit followed by opcode and address/data on rising CLK edges.
Internal logic includes an auto-erase-before-write mechanism, EWEN/EWDS write-protection state machine, and power-on reset circuitry that inhibits operation below 1.5 V. The DO pin serves dual function: serial data output during READ and Ready/Busy status indicator during programming - requiring CS high ≥250 ns after TCSL to sample status.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1 Kbit (128 × 8-bit) - fixed x8 organization; no ORG pin; supports byte-level nonvolatile storage. |
| VCC range | 2.5 V to 5.5 V - compatible with 3.3 V and 5 V logic systems; POR threshold at 1.5 V ensures data integrity during brown-out. |
| Endurance | 1,000,000 erase/write cycles - enables frequent reconfiguration in field-upgradable devices. |
| Data retention | 200 years at 25°C - suitable for sealed industrial equipment with no maintenance access. |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - requires no additional level-shifting for standard MCU GPIOs. |
| Temp grade | Industrial (−40°C to +85°C) - validated across full range for reliable operation in factory automation controllers. |
| Write time | 6 ms typical per byte (TWC) - deterministic timing allows precise host software timeout handling. |
Pinout & Package
93LC46AXT-I/SN is packaged in 8-lead SOIC (SN), with lead finish Matte Tin (Pb-free). Pin 1 is marked by laser dot; package conforms to JEDEC MS-012AA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; deselects device into standby (ICC ≤ 1 µA). |
| CLK (Pin 2) | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcodes, addresses, and data; stoppable at any point. |
| DI (Pin 3) | Data Input | Receives Start bit, instruction opcodes, addresses, and write data; tied to VSS or VCC for EWDS/EWEN control. |
| DO (Pin 4) | Data Output / Status | Outputs read data on rising CLK; indicates Ready (high) or Busy (low) during erase/write when CS is pulsed high. |
| VSS (Pin 5) | Ground | Reference return path for all I/O and internal circuitry; must be low-impedance connection. |
| NC (Pin 6) | No Connection | Internally unconnected; must remain floating or grounded - not used for ORG (A-version only). |
| NC (Pin 7) | No Connection | Internally unconnected; no functional role; PCB trace may be omitted. |
| VCC (Pin 8) | Power Supply | Supplies core logic and memory array; bypass capacitor (0.1 µF) required within 10 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates external timing control - host MCU only needs to monitor DO pin for completion signal. |
| Automatic ERAL before WRAL | Guarantees clean memory state prior to full-array write - prevents partial writes from corrupting retained data. |
| Power-on/off data protection | Hardware lockout below 1.5 V VCC prevents inadvertent writes during power ramp - no software initialization required. |
| EWEN/EWDS write protection | Two-instruction security model forces explicit enable before each write/erase - blocks accidental overwrites in interrupt-driven code. |
| Sequential read mode | Enables continuous address increment while CS remains high - reduces SPI transaction overhead for block reads. |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed at boot; retains values across power cycles and firmware updates. Use Value: Enables field recalibration without hardware replacement; 200-year retention ensures calibration validity over equipment lifetime. | Use Scenario: Holding user-selectable therapy parameters (e.g., dosage limits, alarm thresholds) in portable infusion pumps. IC Role / Device Role / Timing Role: Secure, low-power configuration memory interfaced directly to MCU GPIOs via Microwire. Use Value: Meets IEC 62304 Class C safety requirements via deterministic write timing and hardware write protection. |
| Automotive Body Control Module | Smart Energy Meter Firmware Settings |
Use Scenario: Saving seat/mirror position presets and lighting profiles in vehicle BCMs operating at 12 V nominal (5 V rail). IC Role / Device Role / Timing Role: 8-bit serial EEPROM interfaced to 8-bit MCU with limited peripheral resources. Use Value: Industrial temp grade ensures reliability under hood temperature cycling; 1M endurance supports daily user adjustments. | Use Scenario: Storing tariff schedules, meter ID, and communication keys in ANSI C12.19-compliant utility meters. IC Role / Device Role / Timing Role: Tamper-resistant configuration store with hardware POR protection against power glitch attacks. Use Value: RoHS-compliant Pb-free SOIC-8 simplifies compliance documentation; 2.5 V min VCC supports wide-input DC-DC converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC46BXT-I/SN | 16-bit (64 × 16) organization; same VCC range, package, and timing; no ORG pin. | Requires 16-bit MCU interface or byte-swapping firmware; incompatible with existing 8-bit address/data handling. | Select only if system uses native 16-bit data paths and firmware can accommodate different instruction clock counts (25 vs 18). |
| AT25010B-SSHL-T | 1 Kbit SPI interface (4-wire), 1.8–5.5 V, 20 MHz max clock; no ERAL/WRAL; 100-year retention. | Lacks Microwire compatibility; requires separate CS/CLK/MOSI/MISO routing; no hardware ERAL pre-check. | Choose when migrating to SPI ecosystem or needing higher clock speed; verify firmware rewrite for command set and status polling. |
Compared with 93LC46BXT-I/SN, the 93LC46AXT-I/SN provides direct 8-bit alignment without data packing, reducing MCU cycle count per write. Versus AT25010B-SSHL-T, it offers Microwire legacy support and integrated ERAL-before-WRAL safety but trades off maximum clock rate and SPI toolchain compatibility.
Availability
93LC46AXT-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control modules, and smart energy meter firmware settings requiring stable component supply across extended product lifecycles.
Supply support for 93LC46AXT-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 93LC46A/B/C series was designed specifically for cost-sensitive, low-power embedded systems requiring reliable nonvolatile storage with minimal pin count and simple firmware integration.
FAQ
What is the memory organization of the 93LC46AXT-I/SN?
The 93LC46AXT-I/SN has a fixed 128 × 8-bit (1 Kbit) organization. As an 'A' variant, it does not include an ORG pin and operates exclusively in 8-bit mode - unlike 'C' variants which support configurable 8/16-bit via the ORG pin. This eliminates external configuration logic and simplifies PCB layout for 8-bit microcontroller interfaces.
Does the 93LC46AXT-I/SN require an external pull-up resistor on the DO pin?
No, the 93LC46AXT-I/SN does not require an external pull-up on DO. During READ, DO actively drives high/low; during READY/BSY polling, it outputs valid logic levels. However, if DI and DO are shorted (shared bus), a 10 kΩ series resistor is recommended to prevent bus conflict when A0 = high during dummy-zero phase - per Microchip DS20001749K Section 2.2.
What is the minimum VCC required for reliable operation of the 93LC46AXT-I/SN?
The 93LC46AXT-I/SN requires VCC ≥ 2.5 V for guaranteed specification compliance across the industrial temperature range. Its power-on reset circuitry disables all operations below 1.5 V (typical), preventing spurious writes during power ramp - a hardware safeguard independent of MCU firmware control.
How does the 93LC46AXT-I/SN indicate readiness after a WRITE command?
After issuing a WRITE command, the 93LC46AXT-I/SN enters a self-timed 6 ms programming cycle. To check readiness, the host must bring CS high for ≥250 ns after TCSL, then sample DO: logic low = Busy, logic high = Ready. Issuing a Start bit followed by CS low clears the status flag - enabling immediate next instruction.
Is the 93LC46AXT-I/SN RoHS compliant and Pb-free?
Yes, the 93LC46AXT-I/SN is RoHS compliant and features a Matte Tin (Sn) Pb-free finish per JEDEC J-STD-609. The 'SN' suffix explicitly denotes the 8-lead SOIC package with this environmentally compliant termination - verified in Microchip's DS20001749K packaging section and marking table.
93LC46AXT-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:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Kbit
- Memory Organization:
- 128 x 8
- Memory Interface:
- Microwire
- Clock Frequency:
- 2 MHz
- Write Cycle Time - Word, Page:
- 6ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
93LC46AXT-I/SN FAQ
1.How can I place an order for 93LC46AXT-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC46AXT-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 93LC46AXT-I/SN reliable?
The price and inventory of 93LC46AXT-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 93LC46AXT-I/SN is usually 5 days.
3.What payment methods are accepted for 93LC46AXT-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC46AXT-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC46AXT-I/SN?
93LC46AXT-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC46AXT-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 93LC46AXT-I/SN?
For technical support, including 93LC46AXT-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC46AXT-I/SN requirements.
6.How does Aetrix verify that 93LC46AXT-I/SN is sourced from the original manufacturer or authorized distributors?
All 93LC46AXT-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 93LC46AXT-I/SN meets industry standards.
7.What is the process for return or replacement of 93LC46AXT-I/SN?
All 93LC46AXT-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93LC46AXT-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 93LC46AXT-I/SN part is unused and in its original packaging.
Return procedure for 93LC46AXT-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93LC46AXT-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…
