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Microchip Technology 93AA46C-I/ST
- Part No.:
- 93AA46C-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
93AA46C-I/ST.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,702
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Product details
Overview
93AA46C-I/ST from Microchip Technology Inc. is a 1 Kbit low-voltage serial EEPROM with configurable 8-/16-bit word organization via the ORG pin, 1.8–5.5 V supply range, industrial temperature rating (−40°C to +85°C), and Microwire-compatible 3-wire serial interface. It delivers 1 million erase/write cycles and >200 years data retention for nonvolatile parameter storage in microcontroller-based embedded systems.
For engineers reviewing the 93AA46C-I/ST datasheet, 93AA46C-I/ST pinout, 93AA46C-I/ST application, or 93AA46C-I/ST equivalent, key selection criteria include ORG-pin-controlled memory width, self-timed erase/write with ERAL/WRAL support, Ready/Busy status signaling on DO, sequential read capability, and compatibility with low-power, space-constrained designs requiring stable serial NV memory.
Technical Context
The 93AA46C-I/ST implements a synchronous Microwire-compatible serial interface with CS, CLK, DI, and DO signals, where instruction execution is initiated by a Start condition (CS high + DI high on CLK rising edge). Memory organization is dynamically selected: ORG = VSS enables 128 × 8-bit mode; ORG = VCC enables 64 × 16-bit mode.
It features hardware-level data protection including power-on/off detection (VPOR = 1.5 V), automatic EWDS at power-up, and mandatory EWEN before any erase/write. All programming operations (ERASE, WRITE, ERAL, WRAL) are self-timed and report completion via DO pin polling (low = busy, high = ready), with TWC = 6 ms for erase/write and TWL = 15 ms for WRAL at VCC ≥ 4.5 V.
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 single-supply operation across wide battery and logic rail ranges |
| Endurance | 1,000,000 erase/write cycles - ensures long-term reliability in firmware parameter logging |
| Data retention | >200 years at 25°C - guarantees nonvolatile storage integrity over product lifetime |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - minimal GPIO usage, no address bus required |
| Access time | TPD ≤ 400 ns (VCC ≥ 1.8 V, CL = 100 pF) - enables fast read response in real-time control loops |
| Operating temp | −40°C to +85°C (Industrial grade) - qualified for use in industrial automation and automotive cabin modules |
Pinout & Package
93AA46C-I/ST is packaged in an 8-lead TSSOP (ST) with exposed pad option per Microchip package drawing. Pin 1 is marked by laser; pin 1 ID corner is top-left when notch faces up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; initiates self-timed write on falling edge (93AA/93LC) |
| CLK | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcode/address/data; stoppable mid-sequence |
| DI | Data Input | Receives Start bit, opcodes, addresses, and write data; shares net with DO only with external current-limiting resistor |
| DO | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z on CS falling edge |
| VSS | Ground | Reference for all I/O and internal circuitry; connects to PCB ground plane |
| ORG | Organization Control | Logic level selects 8-bit (VSS) or 16-bit (VCC) word width; must be externally biased, not floating |
| NC | No Connect | Pin 7 has no internal connection; must be left unconnected or tied to VSS per layout best practice |
| VCC | Power Supply | 1.8–5.5 V input; includes internal POR circuit triggering at 1.5 V |
Key Features
| Feature | Design Value |
|---|---|
| ORG-pin word-size selection | Enables single-part flexibility across 8-bit and 16-bit host MCU interfaces without redesign |
| Self-timed erase/write | Eliminates need for external timing control or wait-state insertion in host firmware |
| ERAL and WRAL commands | Supports full-array initialization (erase-all or write-all) in one instruction, reducing host overhead |
| Ready/Busy status on DO | Allows polling-based synchronization instead of fixed delays, improving system responsiveness |
| Power-on/off data protection | Hardware lockout below 1.5 V prevents corruption during brown-out or hot-plug events |
Applications
| Industrial Sensor Calibration | Consumer Remote Control Memory |
|---|---|
Use Scenario: Storing factory-trimmed sensor offset/gain coefficients and user-adjusted calibration points in pressure or temperature transmitters. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during boot and field recalibration; supports sequential reads for multi-parameter recall. Use Value: Eliminates external trim pots and reduces BOM count; ORG pin allows reuse across 8-bit MCU platforms (e.g., PIC12F) and 16-bit platforms (e.g., dsPIC33). | Use Scenario: Retaining user-programmed channel presets, volume levels, and IR code learning history in universal remote controls. IC Role / Device Role / Timing Role: Low-power serial NV memory interfaced to 8-bit RISC MCU; accessed infrequently but must retain data for >10 years. Use Value: 1M endurance and >200-year retention ensure reliable operation over product lifetime; 1.8 V minimum VCC enables direct connection to coin-cell backup rails. |
| Automotive Body Control Module | Medical Infusion Pump Settings |
Use Scenario: Saving seat/mirror position memory, lighting profiles, and door lock preferences in vehicle BCMs operating across −40°C to +85°C. IC Role / Device Role / Timing Role: Industrial-grade EEPROM storing user-configurable settings; accessed via SPI-like Microwire interface during wake-up sequence. Use Value: Qualified for industrial temp range and RoHS-compliant packaging meets automotive qualification requirements without derating. | Use Scenario: Storing drug library parameters, dose limits, alarm thresholds, and audit logs in Class II medical infusion pumps requiring traceable configuration. IC Role / Device Role / Timing Role: Secure, tamper-resistant nonvolatile memory with hardware write-protection (EWEN/EWDS); accessed during startup and therapy setup. Use Value: Automatic EWDS at power-up prevents accidental writes; ERAL/WRAL support simplifies factory reprogramming and field updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC46C-I/ST | Same pinout and ORG functionality, but 2.5–5.5 V VCC range and extended temp support (−40°C to +125°C) | Required for automotive under-hood or high-temp industrial environments where 1.8 V operation is unnecessary | Select 93LC46C-I/ST if system VCC ≥2.5 V and extended temperature range is needed; otherwise 93AA46C-I/ST offers wider low-voltage compatibility. |
| AT25010B-SSHL-T | SPI interface (4-wire), 1.8–5.5 V, 1 Kbit, no ORG pin - fixed 8-bit organization | Lacks dynamic word-width selection; requires separate CS/CLK/MOSI/MISO lines instead of shared DI/DO | Choose AT25010B-SSHL-T only if existing design uses SPI peripherals and 8-bit-only access suffices; 93AA46C-I/ST provides ORG flexibility and lower pin count. |
Compared with 93LC46C-I/ST, the 93AA46C-I/ST supports lower VCC (1.8 V) for battery-backed operation but lacks extended temperature rating; compared with AT25010B-SSHL-T, it offers Microwire compatibility and ORG-selectable word width at the cost of SPI ecosystem alignment.
Availability
93AA46C-I/ST is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer remote control memory, and automotive body control module applications requiring stable component supply, long-term obsolescence management, and RoHS-compliant sourcing.
Supply support for 93AA46C-I/ST 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, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design, manufacturing, and sales operations.
The 93XX46 series is designed specifically for low-power, serial nonvolatile memory applications in resource-constrained embedded systems, emphasizing simplicity, reliability, and broad voltage/temp compatibility.
FAQ
What is the function of the ORG pin on the 93AA46C-I/ST?
The ORG pin on the 93AA46C-I/ST selects memory organization: tied to VSS (ground) configures 128 × 8-bit mode; tied to VCC configures 64 × 16-bit mode. This allows a single 93AA46C-I/ST part to serve both 8-bit and 16-bit host microcontrollers without redesign. The ORG pin must be externally biased-floating is not permitted-and its state is sampled at instruction start.
How does the 93AA46C-I/ST indicate readiness after an erase or write operation?
The 93AA46C-I/ST uses the DO pin to signal Ready/Busy status: DO = low indicates ongoing erase/write; DO = high indicates completion. To poll, CS must be brought high for ≥250 ns after the instruction completes, then DO is sampled. After completion, issuing a Start bit followed by CS low clears the status. This eliminates fixed delay loops in host firmware.
What is the minimum VCC required for reliable operation of the 93AA46C-I/ST?
The 93AA46C-I/ST requires a minimum VCC of 1.8 V for full specification compliance across the industrial temperature range (−40°C to +85°C). Its internal power-on reset (POR) circuit triggers at 1.5 V, disabling all operations below this threshold to prevent data corruption during brown-out conditions.
Can the 93AA46C-I/ST be used in a 3-wire bus with shared DI/DO lines?
Yes, the 93AA46C-I/ST supports shared DI/DO lines, but a current-limiting resistor (typically 10 kΩ) must be placed between them to prevent bus conflict during the dummy zero preceding read operations. Without this resistor, undefined voltage levels may occur if address bit A0 is high, risking data integrity or excessive current draw.
What packaging and marking details apply to the 93AA46C-I/ST?
The 93AA46C-I/ST in ST package is an 8-lead TSSOP with lead finish Matte Tin (Pb-free), industrial temperature grade (I), and laser-marked top-side identification including part code "A46C", year/week code, and traceability characters. Per Microchip DS20001749K, pin 1 is identified by a laser mark in the top-left corner adjacent to the notch.
93AA46C-I/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- 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-TSSOP
93AA46C-I/ST FAQ
1.How can I place an order for 93AA46C-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA46C-I/ST 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 93AA46C-I/ST reliable?
The price and inventory of 93AA46C-I/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93AA46C-I/ST is usually 5 days.
3.What payment methods are accepted for 93AA46C-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA46C-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA46C-I/ST?
93AA46C-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA46C-I/ST 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 93AA46C-I/ST?
For technical support, including 93AA46C-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA46C-I/ST requirements.
6.How does Aetrix verify that 93AA46C-I/ST is sourced from the original manufacturer or authorized distributors?
All 93AA46C-I/ST 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 93AA46C-I/ST meets industry standards.
7.What is the process for return or replacement of 93AA46C-I/ST?
All 93AA46C-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 93AA46C-I/ST, 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 93AA46C-I/ST part is unused and in its original packaging.
Return procedure for 93AA46C-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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