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Microchip Technology AT93C46-10SC
- Part No.:
- AT93C46-10SC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT93C46-10SC.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 2MHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,409
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Product details
Overview
AT93C46-10SC from Microchip Technology (formerly Atmel) is a 1K-bit 3-wire serial EEPROM with user-selectable 128 × 8 or 64 × 16 organization, operating from 2.7V to 5.5V, featuring 2 MHz clock compatibility at 5V, self-timed 10 ms max write cycle, and 1 million write endurance. It serves as nonvolatile configuration storage in microcontroller-based industrial control modules requiring low-voltage operation and space-constrained PCB layouts.
For engineers reviewing the AT93C46-10SC datasheet, AT93C46-10SC pinout, AT93C46-10SC application, or AT93C46-10SC equivalent, key selection criteria include voltage range compatibility (2.7–5.5V), 8-pin SOIC JEDEC package footprint, 3-wire interface timing constraints, and ORG-pin configurable memory width for legacy system integration.
Technical Context
The AT93C46-10SC implements a synchronous 3-wire serial interface with dedicated CS, SK, DI, and DO lines, where instruction decoding begins on CS rising edge and data transfer is edge-aligned to SK. Its internal organization is dynamically selected via the ORG pin: tied to VCC enables 64-word × 16-bit mode; grounded enables 128-word × 8-bit mode.
Write operations require explicit EWEN instruction before ERASE or WRITE, and status polling is supported via DO pin during CS high after tCS ≥ 250 ns. The device supports full-array ERAL/WRAL instructions only at VCC = 4.5–5.5V, while standard READ/WRITE remain functional across the full 2.7–5.5V range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 × 8 or 64 × 16 organization) |
| Supply Voltage Range | 2.7V to 5.5V - enables direct interfacing with 3.3V and 5V logic without level shifters |
| Max Clock Frequency | 2 MHz at VCC = 5V - sets maximum serial data throughput at ~200 kbps for 8-bit reads |
| Write Cycle Time | 10 ms maximum - defines minimum interval between successive WRITE commands |
| Endurance | 1 million write cycles - supports frequent calibration or runtime parameter updates over product lifetime |
| Data Retention | 100 years at 25°C - ensures long-term reliability of stored configuration or serial ID data |
| Operating Temperature | -40°C to +85°C - qualified for industrial ambient environments without derating |
Pinout & Package
AT93C46-10SC is supplied in an 8-lead JEDEC-standard SOIC package (package code 8S1), 0.150" wide, with gull-wing leads and standard 1.27 mm pitch. Pin 1 is marked by a beveled corner or dot; the package is RoHS-compliant and moisture-sensitive level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable: device responds only when CS is low; DO enters high-impedance state when CS is high |
| SK | Serial Clock | Input clock synchronizing all data transfers; rising edge latches DI, falling edge samples DO |
| DI | Data Input | Serial instruction/address/data input; accepts 7-bit opcodes, 7-bit addresses (x8) or 6-bit (x16), and 8/16-bit data |
| DO | Data Output | Open-drain output providing read data, READY/BUSY status, or high-Z when CS high |
| VCC | Power Supply | Primary supply rail (2.7–5.5V); powers internal logic and charge pump for write operations |
| GND | Ground | Reference return path for all I/O and internal circuitry; must be low-impedance connection |
| ORG | Organization Select | Logic-level input determining memory width: VCC → 64×16, GND → 128×8; unconnected defaults to x16 via internal pull-up |
| DC | Don't Connect | No internal connection; must be left floating or tied to GND/VCC per layout best practice - no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| User-selectable memory organization | Hardware-configurable 128×8 or 64×16 via ORG pin - eliminates firmware rework when migrating between byte- and word-addressed systems |
| Multi-voltage operation | Single part supports 2.7–5.5V supply - reduces BOM count across 3.3V and 5V platforms without voltage translation |
| Self-timed write cycle | No external timing control needed; DO indicates BUSY/READY status - simplifies host controller software and removes need for fixed delays |
| High-reliability nonvolatile storage | 1M write cycles and 100-year data retention - suitable for infrequent but mission-critical parameter storage (e.g., calibration coefficients, device IDs) |
| ESD protection | >4000V HBM - enhances robustness during handling and board assembly in standard manufacturing environments |
Applications
| Industrial Sensor Calibration Storage | Embedded System Configuration Memory |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed once at power-up via SPI-compatible 3-wire interface. Use Value: Enables field-replaceable sensor modules with unique calibration data retained across power cycles without battery backup. |
Use Scenario: Holding boot-time configuration flags (e.g., UART baud rate, I/O pin mapping, watchdog timeout) in ARM Cortex-M0+ based motor drives. IC Role / Device Role / Timing Role: Serial configuration store initialized during firmware startup sequence using minimal GPIO resources. Use Value: Reduces reliance on internal flash wear cycles and allows runtime reconfiguration without MCU reset. |
| Consumer Appliance Parameter Retention | Automotive Body Control Module NVM |
Use Scenario: Preserving user preferences (e.g., temperature setpoints, display brightness) in smart thermostats after AC power loss. IC Role / Device Role / Timing Role: Low-power serial EEPROM accessed intermittently during UI state changes or power-down sequences. Use Value: Achieves sub-1 µA standby current at 2.7V - extends battery backup life beyond 10 years in coin-cell powered designs. |
Use Scenario: Storing seat position memory, mirror angle presets, and lighting profiles in automotive door modules. IC Role / Device Role / Timing Role: AEC-Q100 qualified nonvolatile memory interfaced to 8-bit microcontrollers via dedicated 3-wire bus. Use Value: Meets -40°C to +85°C industrial temp grade requirements and supports 100k-cycle durability for daily user adjustments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95128-WMN6TP | 128 Kbit SPI interface (4-wire), 2.5–5.5V, 20 MHz max clock, 5 ms write time | Higher density and faster interface; requires separate /WP and /HOLD pins not present on AT93C46-10SC | Select when migrating to SPI-based platforms with higher bandwidth needs and available GPIOs for additional control signals |
| STK11C68-CSW6F | 1K-bit NVSRAM with automatic store/restore, 4.5–5.5V only, parallel interface (8-bit data + address bus) | Zero-write-cycle latency for volatile reads/writes; requires 28-pin SOIC footprint and external capacitor for power-loss store | Choose only if deterministic sub-microsecond write latency is required and board space permits larger package and support components |
Compared with M95128-WMN6TP and STK11C68-CSW6F, the AT93C46-10SC offers lowest pin count (8-pin SOIC), simplest 3-wire protocol, and broadest voltage range - making it optimal for cost-sensitive, space-constrained embedded systems where moderate density and guaranteed 2.7V operation are primary requirements.
Availability
AT93C46-10SC is available at Aetrix Electronics and suitable for industrial sensor calibration storage, embedded system configuration memory, consumer appliance parameter retention, and automotive body control module NVM requiring stable component supply and long-lifecycle support.
Supply support for AT93C46-10SC 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 acquired Atmel in 2016 and maintains full technical and manufacturing continuity for the AT93C series. The company specializes in microcontrollers, analog, and memory solutions for industrial, automotive, and consumer markets.
The AT93C46-10SC belongs to Microchip's legacy serial EEPROM product line, designed specifically for low-pin-count, low-power configuration storage in resource-constrained embedded systems where simplicity, reliability, and wide supply voltage tolerance are critical.
FAQ
What is the function of the ORG pin on the AT93C46-10SC?
The ORG pin on the AT93C46-10SC selects internal memory organization: when tied to VCC, it configures the device as 64 words × 16 bits; when grounded, it configures as 128 words × 8 bits. An unconnected ORG pin defaults to x16 mode via an internal ~1 MΩ pull-up. This hardware-selectable width eliminates firmware dependency and supports interoperability with both byte- and word-oriented host processors.
Does the AT93C46-10SC support 1.8V operation?
No, the AT93C46-10SC does not support 1.8V operation. Its specified supply range is 2.7V to 5.5V, as indicated by the "-2.7" suffix in the ordering code. Devices with 1.8V capability carry the "-1.8" suffix (e.g., AT93C46-10SC-1.8) and exhibit different DC/AC characteristics, including reduced maximum clock frequency and higher standby current limits.
How is write protection implemented on the AT93C46-10SC?
Write protection on the AT93C46-10SC is instruction-based: the device powers up in Erase/Write Disable (EWDS) state, and all programming instructions (WRITE, ERASE, WRAL, ERAL) are blocked until an Erase/Write Enable (EWEN) instruction is issued. After programming, executing EWDS restores protection. There is no hardware write-protect pin - security relies entirely on correct instruction sequencing and host software control.
Can the AT93C46-10SC be used with a 3.3V microcontroller without level shifting?
Yes, the AT93C46-10SC is fully compatible with 3.3V microcontrollers. Its VIH min is VCC × 0.7 (2.31V at 3.3V), and its VOL max is 0.2V at 0.15 mA - well within 3.3V logic thresholds. All I/O pins are 5V-tolerant, allowing direct connection to 3.3V GPIOs without external level shifters, provided VCC is supplied at 3.3V or within the 2.7–5.5V range.
What is the purpose of the DC pin on the AT93C46-10SC?
DC (Don't Connect) is a no-connect pin on the AT93C46-10SC with no internal bond wire or circuit connection. It must be left floating on the PCB; tying it to VCC or GND has no functional effect but may introduce unintended parasitic capacitance. Layout guidelines recommend omitting solder paste on this pad to prevent accidental bridging during reflow.
AT93C46-10SC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- 3-Wire Serial
- Clock Frequency:
- 2 MHz
- Write Cycle Time - Word, Page:
- 10ms
- Access Time:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT93C46-10SC FAQ
1.How can I place an order for AT93C46-10SC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46-10SC 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 AT93C46-10SC reliable?
The price and inventory of AT93C46-10SC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT93C46-10SC is usually 5 days.
3.What payment methods are accepted for AT93C46-10SC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46-10SC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46-10SC?
AT93C46-10SC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46-10SC 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 AT93C46-10SC?
For technical support, including AT93C46-10SC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46-10SC requirements.
6.How does Aetrix verify that AT93C46-10SC is sourced from the original manufacturer or authorized distributors?
All AT93C46-10SC 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 AT93C46-10SC meets industry standards.
7.What is the process for return or replacement of AT93C46-10SC?
All AT93C46-10SC units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46-10SC, 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 AT93C46-10SC part is unused and in its original packaging.
Return procedure for AT93C46-10SC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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