My Inquiry
My Account
Microchip Technology 93AA46CX-I/SN
- Part No.:
- 93AA46CX-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93AA46CX-I/SN.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,605
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
93AA46CX-I/SN from Microchip Technology Inc. is a 1 Kbit (128 × 8-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, operating across 1.8–5.5 V, supporting Industrial temperature range (−40°C to +85°C), and featuring self-timed erase/write cycles, automatic ERAL/WRAL, and Ready/Busy status output via DO pin - used for configuration storage in microcontroller-based embedded systems.
For engineers reviewing the 93AA46CX-I/SN datasheet, 93AA46CX-I/SN pinout, 93AA46CX-I/SN application, or 93AA46CX-I/SN equivalent, key selection criteria include voltage compatibility (1.8–5.5 V), 8-bit fixed organization (no ORG pin), SOIC-8 package footprint, 1 million endurance cycles, and 200-year data retention - critical for long-life industrial firmware parameter storage.
Technical Context
This device implements a synchronous serial Microwire interface with CS, CLK, DI, and DO signals, requiring a Start bit detection before instruction execution. It uses internal address decoding and auto-erase-before-write logic, with all programming operations gated by EWEN/EWDS control states.
Memory access follows strict timing: TCSL ≥ 250 ns between instructions; TPD ≤ 400 ns (1.8 V); and TWC = 6 ms for erase/write cycles. The DO pin serves dual function - data output during READ and Ready/Busy status polling during programming - with High-Z behavior when CS is low or during non-read states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Kbit (128 × 8-bit organization; fixed x8 mode, no ORG pin) |
| VCC Range | 1.8 V to 5.5 V - supports single-supply operation in battery-powered and mixed-voltage MCU systems |
| Endurance | 1,000,000 erase/write cycles - enables frequent calibration or logging updates without wear-out risk |
| Data Retention | 200 years at 25°C - ensures firmware configuration integrity over full product lifecycle |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - minimal GPIO usage, no SPI mode bits required |
| Write Cycle Time | 6 ms typical - deterministic timing for host software timeout handling |
| Operating Temp | −40°C to +85°C (Industrial grade) - validated for use in factory automation and outdoor electronics |
Pinout & Package
Package: 8-lead SOIC (SN), Pb-free Matte Tin finish, 150 mil body width, standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS | Chip Select | Active-high enable; must be held low ≥250 ns between commands; resets internal logic when low |
| 2 CLK | Serial Clock | Positive-edge synchronized I/O; clocking stops during self-timed write; no clock required post-instruction |
| 3 DI | Data Input | Accepts Start bit, opcode, address, and data; high-impedance when not selected |
| 4 DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge |
| 5 VSS | Ground | Reference for all I/O and internal circuitry; must be low-impedance connection |
| 6 NC | No Connection | Internally unconnected; must be left floating or tied to VSS per layout best practice |
| 7 NC | No Connection | Internally unconnected; no routing or loading required |
| 8 VCC | Power Supply | 1.8–5.5 V supply; includes internal POR detection at ~1.5 V to inhibit writes during brownout |
Key Features
| Feature | Design Value |
|---|---|
| Low-power CMOS | Standby current ≤1 µA at 25°C - extends battery life in always-on sensor nodes |
| Self-timed Erase/Write | No external timing components needed; host only waits for DO status or fixed 6 ms timeout |
| Auto-ERAL before WRAL | WRAL command internally executes full array erase before write - eliminates separate ERAL step |
| Power-On/Off Data Protection | Hardware lockout below VPOR ≈1.5 V prevents corruption during power ramp-up/down |
| Ready/Busy Status | DO pin provides real-time programming status without requiring command overhead or polling delay registers |
Applications
| Industrial Sensor Calibration Storage | Consumer Appliance Configuration Memory |
|---|---|
|
Use Scenario: Storing factory-calibrated ADC offset/gain coefficients and user-adjusted settings in temperature/humidity sensors. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed infrequently during boot or service mode via Microwire interface. Use Value: Enables field-replaceable sensor modules with persistent calibration data across power cycles and firmware updates. |
Use Scenario: Retaining user preferences (e.g., cooking time, temperature presets) and error logs in smart ovens and washing machines. IC Role / Device Role / Timing Role: Low-pin-count serial EEPROM interfaced directly to 8-bit MCU GPIOs with minimal board space. Use Value: Provides reliable, low-cost, long-retention memory without requiring complex SPI initialization or external voltage supervisors. |
| Medical Device Parameter Backup | Automotive Body Control Module Settings |
|
Use Scenario: Saving therapy parameters and usage history in portable infusion pumps where data integrity is safety-critical. IC Role / Device Role / Timing Role: Fail-safe configuration store with hardware brownout protection and 200-year retention. Use Value: Meets IEC 62304 Class C software requirements for persistent data without external supervision circuitry. |
Use Scenario: Storing seat/mirror position memory, lighting profiles, and diagnostic trouble code (DTC) history in BCMs. IC Role / Device Role / Timing Role: Industrial-grade EEPROM operating across −40°C to +85°C ambient, interfaced to CAN-linked microcontrollers. Use Value: Eliminates need for higher-cost AEC-Q100 qualified EEPROMs while meeting functional safety data retention needs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC46A-I/SN | VCC min = 2.5 V; same 128 × 8-bit organization, SOIC-8 package, and Microwire interface | Not suitable for 1.8 V systems; otherwise pin- and function-compatible | Select if system operates ≥2.5 V and requires Microchip's extended temp support (I/E grades) |
| AT25010B-MAHL-T | SPI interface (4-wire), 1 Kbit (128 × 8), 1.8–5.5 V, 20 MHz max clock, different command set | Requires SPI peripheral instead of generic GPIO bit-banging; no Ready/Busy pin - relies on WIP flag polling | Choose when existing design uses SPI peripherals and higher throughput is needed; not drop-in replaceable |
Compared with 93LC46A-I/SN, the 93AA46CX-I/SN supports lower voltage operation (1.8 V vs. 2.5 V), making it preferable for energy-harvesting or coin-cell systems; versus AT25010B-MAHL-T, it offers simpler timing control and hardware status signaling but at lower maximum clock rate.
Availability
93AA46CX-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration storage, consumer appliance configuration memory, and medical device parameter backup requiring stable component supply, long-term data retention, and low-voltage operation.
Supply support for 93AA46CX-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 devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93AAxx series is part of Microchip's legacy serial EEPROM product line designed specifically for cost-sensitive, low-pin-count embedded systems requiring robust nonvolatile storage with minimal external components and wide supply voltage tolerance.
FAQ
What is the memory organization of the 93AA46CX-I/SN?
The 93AA46CX-I/SN is a fixed 128 × 8-bit (1 Kbit) device with no ORG pin - it operates exclusively in x8 mode. Unlike 'C' variants (e.g., 93AA46C), the 'X' suffix in 93AA46CX-I/SN confirms absence of ORG functionality, eliminating configuration ambiguity in host firmware.
Does the 93AA46CX-I/SN require an external pull-up resistor on the DO pin?
No - the 93AA46CX-I/SN drives DO actively during READ and Ready/Busy status reporting. A pull-up is unnecessary and may cause contention; DO transitions to High-Z when CS is low or during non-read states, so bus-sharing designs should use series resistors if DI/DO are shorted.
How is write protection implemented on the 93AA46CX-I/SN?
Write protection is enforced via hardware POR lockout below ~1.5 V and software-controlled EWEN/EWDS commands. The device powers up in EWDS (Erase/Write Disable) state; an explicit EWEN instruction is mandatory before any ERASE or WRITE, and EWDS should follow each write to prevent accidental modification.
Can the 93AA46CX-I/SN be used in a 3.3 V system?
Yes - the 93AA46CX-I/SN is fully specified for 1.8–5.5 V operation, including 3.3 V nominal systems. All DC and AC parameters (e.g., VIH/VIL thresholds, TPD, FCLK up to 3 MHz) are guaranteed across this range, with no level-shifting required for MCU GPIO interfacing.
What is the purpose of the NC pins on the 93AA46CX-I/SN SOIC package?
Pins 6 and 7 of the 93AA46CX-I/SN SOIC-8 package are No Connect (NC) - internally unconnected and electrically isolated. They must be left floating in PCB layout; tying them to VSS or VCC is not recommended and provides no functional benefit.
93AA46CX-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
93AA46CX-I/SN FAQ
1.How can I place an order for 93AA46CX-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA46CX-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 93AA46CX-I/SN reliable?
The price and inventory of 93AA46CX-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 93AA46CX-I/SN is usually 5 days.
3.What payment methods are accepted for 93AA46CX-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA46CX-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA46CX-I/SN?
93AA46CX-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA46CX-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 93AA46CX-I/SN?
For technical support, including 93AA46CX-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA46CX-I/SN requirements.
6.How does Aetrix verify that 93AA46CX-I/SN is sourced from the original manufacturer or authorized distributors?
All 93AA46CX-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 93AA46CX-I/SN meets industry standards.
7.What is the process for return or replacement of 93AA46CX-I/SN?
All 93AA46CX-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93AA46CX-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 93AA46CX-I/SN part is unused and in its original packaging.
Return procedure for 93AA46CX-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93AA46CX-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…
