My Inquiry
My Account
Microchip Technology 93AA46AE48T-I/OT
- Part No.:
- 93AA46AE48T-I/OT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SOT-23-6
- Datasheet:
-
93AA46AE48T-I/OT.pdf
- Description:
- IC EEPROM 1KBIT MIC WIRE SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:13,378
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
93AA46AE48T-I/OT from Microchip Technology Inc. is a 1 Kbit (128 × 8) low-voltage serial EEPROM with factory-programmed EUI-48™ node address, 1.8V–5.5V supply range, and industrial temperature rating (–40°C to +85°C). It uses Microwire-compatible 3-wire serial interface (CS/CLK/DI/DO), supports self-timed erase/write cycles, and delivers >200 years data retention. It is used in Ethernet controller boot-up for MAC address loading in LAN92xx-series systems.
For engineers reviewing the 93AA46AE48T-I/OT datasheet, 93AA46AE48T-I/OT pinout, 93AA46AE48T-I/OT application, or 93AA46AE48T-I/OT equivalent, key selection criteria include EUI-48 preprogramming validation, SOT-23-6 package compatibility, 1.8V minimum VCC operation, Ready/Busy status via DO pin, and ERAL/WRAL command support at ≥4.5V.
Technical Context
The 93AA46AE48T-I/OT implements a synchronous Microwire-compatible serial interface with CS-active-high selection, rising-edge clocked DI/DO, and integrated Ready/Busy status output on DO. Its memory array is organized as 128 words × 8 bits, with factory-programmed EUI-48 address stored at 0x01–0x06 and EEPROM Programmed Indicator (EPI = 0xA5) at 0x00.
It features hardware-level data protection including power-on/off circuitry, EWEN/EWDS write-enable/disable commands, and automatic ERAL before WRAL. All programming operations (ERASE, WRITE, ERAL, WRAL) are self-timed and require VCC ≥4.5V for full-cycle execution (ERAL/WRAL), while read and standby functions operate down to 1.8V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Kbit (128 × 8-bit words) - fixed storage capacity for MAC address and small configuration data |
| Supply Voltage Range | 1.8V to 5.5V - enables direct interfacing with 1.8V, 2.5V, 3.3V, and 5V logic systems without level shifters |
| Data Retention | >200 years - ensures long-term validity of preprogrammed EUI-48 address across product lifecycle |
| Endurance | 1,000,000 erase/write cycles - supports frequent reconfiguration in development or field-update scenarios |
| Interface Protocol | Microwire 3-wire serial (CS/CLK/DI/DO) - minimal pin count, compatible with legacy and resource-constrained microcontrollers |
| Node Address | Preprogrammed EUI-48™ (OUI + Extension) at 0x01–0x06 - eliminates need for external MAC provisioning in LAN92xx Ethernet controllers |
| Temperature Range | Industrial: –40°C to +85°C - qualified for deployment in embedded networking, industrial control, and automotive infotainment environments |
Pinout & Package
93AA46AE48T-I/OT is packaged in a 6-lead SOT-23 (OT) surface-mount package, measuring 2.80 mm × 1.60 mm × 1.15 mm (L × W × H), with gull-wing leads and RoHS-compliant matte tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DO) | Data Output / Ready-Busy Status | Tri-state output delivering read data or active-low busy signal during erase/write; high-Z when deselected |
| 2 (VSS) | Ground Reference | Primary return path for all internal circuits; must be low-impedance connection to system ground plane |
| 3 (DI) | Data Input | Serial input for opcodes, addresses, and write data; synchronized to rising CLK edge |
| 4 (CLK) | Serial Clock Input | Master-synchronized timing source; supports up to 2 MHz (≥2.5V) or 1 MHz (1.8–2.5V) |
| 5 (CS) | Chip Select Input | Active-high enable; device enters standby when low, but completes ongoing programming before sleep |
| 6 (VCC) | Power Supply | Single-supply input supporting 1.8V–5.5V; internal voltage detect (VPOR = 1.5V) prevents operation below safe threshold |
Key Features
| Feature | Design Value |
|---|---|
| EUI-48™ Preprogramming | Globally unique 48-bit node address factory-written at 0x01–0x06 with EPI (0xA5) at 0x00 - enables plug-and-play MAC identity for LAN9210/LAN9221 Ethernet controllers |
| Self-Timed Erase/Write | No external timing control required; falling edge of CS initiates auto-erase + program cycle (TWC = 6 ms max) - simplifies firmware timing logic |
| Automatic ERAL before WRAL | WRAL instruction internally executes ERAL first - guarantees clean memory state before bulk write, eliminating separate erase step |
| Power-On/Off Data Protection | Hardware lockout below VPOR = 1.5V and EWDS default-on reset state - prevents corruption during brown-out or hot-plug events |
| Sequential Read Mode | Holding CS high after READ enables automatic address increment and continuous 8-bit word streaming - reduces host CPU overhead in configuration dump scenarios |
Applications
| Ethernet Controller Boot | Industrial Device Identity |
|---|---|
Use Scenario: Power-on initialization of LAN9221 Ethernet PHY where MAC address must be loaded before link establishment. IC Role / Device Role / Timing Role: Nonvolatile MAC address source providing EUI-48™ identity to LAN9221 via Microwire interface during reset sequence. Use Value: Eliminates need for external MAC programming; LAN9221 automatically reads 0x01–0x06 on startup, reducing BOM and boot-time latency. |
Use Scenario: Unique device serialization in programmable logic controllers (PLCs) requiring traceable node identity across firmware updates. IC Role / Device Role / Timing Role: Factory-provisioned identity storage holding immutable OUI+extension pair, accessible via standard READ command. Use Value: Enables deterministic device identification in Modbus TCP networks without host-side address management or flash partitioning. |
| Embedded Network Diagnostics | Secure Firmware Binding |
Use Scenario: Field-service tool querying node identity during network diagnostics of remote IoT gateways. IC Role / Device Role / Timing Role: Read-only access point for EUI-48™ address via simple 3-wire SPI-like transaction, independent of main MCU state. Use Value: Allows service technicians to retrieve verified hardware identity even if primary MCU is unresponsive or corrupted. |
Use Scenario: Binding firmware image checksum to hardware identity in secure boot chain for industrial edge devices. IC Role / Device Role / Timing Role: Immutable root-of-trust anchor storing cryptographic binding key derived from EUI-48™ value during manufacturing. Use Value: Prevents firmware cloning across units; each device's signature incorporates its globally unique 48-bit address. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM with preprogrammed node identity applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93AA46A-I/SN | No factory EUI-48™ programming; blank memory array; SOIC-8 package | Requires external MAC provisioning; not compatible with LAN92xx auto-detect | Select only if custom node address assignment is needed and SOIC-8 footprint is acceptable |
| AT24MAC402-MAHM-T | EUI-48™ preprogrammed; I²C interface; 2-Kbit capacity; 8-lead UDFN package | Uses I²C instead of Microwire; incompatible clock/data protocol; different pinout and voltage thresholds | Choose only if system already uses I²C infrastructure and UDFN assembly capability exists |
Compared with 93AA46AE48T-I/OT, the 93AA46A-I/SN lacks EUI-48™ identity and requires host-based MAC management, while the AT24MAC402-MAHM-T offers higher density and I²C compatibility but mandates interface redesign and layout changes - neither is pin- or protocol-compatible.
Availability
93AA46AE48T-I/OT is available at Aetrix Electronics and suitable for Ethernet controller boot, industrial device identity, embedded network diagnostics, and secure firmware binding requiring stable component supply across multi-year production cycles.
Supply support for 93AA46AE48T-I/OT 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 global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with design centers and manufacturing facilities across North America, Asia, and Europe.
The 93AA46AE48 series belongs to Microchip's serial EEPROM product line, engineered specifically for embedded networking applications requiring guaranteed-unique hardware identity and low-voltage, low-pin-count nonvolatile storage.
FAQ
What is the factory-programmed content of the 93AA46AE48T-I/OT?
The 93AA46AE48T-I/OT contains a globally unique EUI-48™ node address prewritten to memory locations 0x01–0x06, preceded by an EEPROM Programmed Indicator (EPI = 0xA5) at location 0x00. This allows LAN92xx Ethernet controllers to auto-detect and load the MAC address at power-up without host intervention. The 93AA46AE48T-I/OT does not ship with user data preloaded outside this identity block.
Does the 93AA46AE48T-I/OT support I²C or SPI interfaces?
No, the 93AA46AE48T-I/OT uses a Microwire-compatible 3-wire serial interface (CS/CLK/DI/DO) and is not electrically or logically compatible with I²C or SPI protocols. It requires dedicated Microwire timing (e.g., start condition detection, opcode-driven instruction set) and does not support multi-master arbitration, ACK/NACK, or 4-wire full-duplex operation. The 93AA46AE48T-I/OT must be driven by a controller capable of generating Microwire waveforms.
What voltage range is required to execute ERAL or WRAL commands on the 93AA46AE48T-I/OT?
Both ERAL (Erase All) and WRAL (Write All) commands on the 93AA46AE48T-I/OT require VCC ≥4.5V for reliable execution, as specified in the datasheet AC characteristics table (A13, A14). Operating below this threshold may result in incomplete erasure or write failure. Standard READ, WRITE, and ERASE operations function across the full 1.8V–5.5V range, but bulk operations are voltage-gated for process reliability.
How is Ready/Busy status monitored on the 93AA46AE48T-I/OT?
Ready/Busy status is monitored on the DO pin of the 93AA46AE48T-I/OT: after initiating an ERASE, WRITE, ERAL, or WRAL command, bring CS high for ≥250 ns (TCSL), then sample DO - low indicates ongoing operation, high indicates completion. DO returns to high-Z when CS is low. The 93AA46AE48T-I/OT does not provide interrupt or status register access; polling is the sole method.
Can the preprogrammed EUI-48™ address in the 93AA46AE48T-I/OT be overwritten?
Yes, the EUI-48™ address stored at 0x01–0x06 in the 93AA46AE48T-I/OT is fully writable using standard WRITE or WRAL commands - it is not hardware-locked. However, overwriting requires prior execution of EWEN (Erase/Write Enable), and accidental modification will break LAN92xx auto-detection. The 93AA46AE48T-I/OT datasheet explicitly warns users to protect this region in firmware unless intentional reprogramming is intended.
93AA46AE48T-I/OT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-23-6
- 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:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
93AA46AE48T-I/OT FAQ
1.How can I place an order for 93AA46AE48T-I/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA46AE48T-I/OT 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 93AA46AE48T-I/OT reliable?
The price and inventory of 93AA46AE48T-I/OT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93AA46AE48T-I/OT is usually 5 days.
3.What payment methods are accepted for 93AA46AE48T-I/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA46AE48T-I/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA46AE48T-I/OT?
93AA46AE48T-I/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA46AE48T-I/OT 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 93AA46AE48T-I/OT?
For technical support, including 93AA46AE48T-I/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA46AE48T-I/OT requirements.
6.How does Aetrix verify that 93AA46AE48T-I/OT is sourced from the original manufacturer or authorized distributors?
All 93AA46AE48T-I/OT 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 93AA46AE48T-I/OT meets industry standards.
7.What is the process for return or replacement of 93AA46AE48T-I/OT?
All 93AA46AE48T-I/OT units undergo pre-shipment inspection (PSI). If there is an issue with 93AA46AE48T-I/OT, 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 93AA46AE48T-I/OT part is unused and in its original packaging.
Return procedure for 93AA46AE48T-I/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93AA46AE48T-I/OT 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…
