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Microchip Technology AT93C46DN-SH-T
- Part No.:
- AT93C46DN-SH-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C46DN-SH-T.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:45,295
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Product details
Overview
AT93C46DN-SH-T from Microchip Technology is a 1-Kbit three-wire serial EEPROM with user-selectable 128 × 8 or 64 × 16 organization, operating from 1.8V to 5.5V, rated for -40°C to +85°C, and featuring 1,000,000 write cycles and 100-year data retention. It serves as nonvolatile configuration storage in embedded controllers, power management units, and sensor calibration modules.
For engineers reviewing the AT93C46DN-SH-T datasheet, AT93C46DN-SH-T pinout, AT93C46DN-SH-T application, or AT93C46DN-SH-T equivalent, key selection considerations include voltage range compatibility (1.8–5.5V), industrial temperature support, self-timed 5 ms max write cycle, ORG-pin-based memory configuration, and SOIC-8 package mechanical fit.
Technical Context
The AT93C46DN-SH-T implements a synchronous three-wire interface (CS/SK/DI/DO) with rising-edge clock synchronization and supports READ, WRITE, ERASE, EWEN, EWDS, WRAL, and ERAL commands. Its internal organization is dynamically selected via the ORG pin: tied to VCC for 64 × 16 mode, GND for 128 × 8 mode.
It integrates on-chip high-voltage generation for EEPROM programming, Power-on Reset (POR) circuitry with 100 µs tPUP delay, and Ready/Busy status reporting via DO pin during write/erase operations. The device uses a 128 × 8 or 64 × 16 EEPROM array with column/row decoding and output buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1,024 bits (128 × 8 or 64 × 16 configurable) |
| Supply Voltage Range | 1.8V to 5.5V - enables direct interface with 1.8V, 2.7V, 3.3V, and 5V logic systems without level shifting |
| Max Clock Frequency | 2 MHz at 4.5–5.5V - supports fast configuration reads in time-critical boot sequences |
| Write Cycle Time | ≤5 ms - self-timed; eliminates need for external timing control or polling overhead |
| Endurance & Retention | 1,000,000 write cycles / 100 years data retention at 55°C - suitable for field-updatable calibration tables |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded applications including motor drives and PLC I/O modules |
| Interface Protocol | Three-wire serial (CS/SK/DI/DO) - minimal GPIO usage; no SPI mode bits or CS polarity ambiguity |
Pinout & Package
AT93C46DN-SH-T is supplied in an 8-lead SOIC package (3.9 mm × 4.9 mm body, 1.27 mm pitch). Pin 1 is marked by a beveled corner or dot; the exposed pad is not present in SOIC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable: device responds only when CS = HIGH; DO enters high-Z when CS = LOW |
| SK | Serial Data Clock | Rising-edge synchronized I/O: all data latched and shifted on SK rising edge |
| DI | Serial Data Input | Receives instruction opcodes (READ/EWEN/WRITE), addresses, and write data |
| DO | Serial Data Output | Outputs read data or Ready/Busy status (logic '1' = ready, '0' = busy) when CS is reasserted post-write |
| GND | Ground Reference | System ground return path; must be low-impedance connection for stable EEPROM operation |
| ORG | Organization Select | Configures memory map: VCC → 64 × 16, GND → 128 × 8; unconnected defaults to x16 (AT93C46D family) |
| NC | No Connect | Pin 7 is internally unconnected; must be left floating or tied to GND/VCC per PCB layout constraints |
| VCC | Power Supply | Single supply input (1.8–5.5V); powers internal logic, HV generator, and EEPROM array |
Key Features
| Feature | Design Value |
|---|---|
| User-selectable memory organization | Hardware-configurable 128 × 8 or 64 × 16 via ORG pin - avoids firmware rework when migrating between byte- and word-addressed legacy systems |
| Low-voltage operation down to 1.8V | Full functionality at 1.8V with 250 kHz min clock - enables use in battery-powered IoT nodes and energy-harvesting sensors |
| Self-timed write cycle | Max 5 ms duration with automatic completion detection - eliminates need for fixed delays or status polling loops in host firmware |
| Industrial temperature grade | -40°C to +85°C operation - validated for deployment in automotive body control modules and industrial HMI front panels |
| Green packaging | RoHS-compliant, halide-free, lead-free SOIC - meets IPC-J-STD-609A Class 1 moisture sensitivity and environmental compliance requirements |
Applications
| Industrial Sensor Calibration | Embedded Controller Configuration |
|---|---|
|
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during power-up initialization; read-only during runtime. Use Value: Enables plug-and-play sensor replacement without manual recalibration; leverages 100-year retention to avoid field recalibration over product lifetime. |
Use Scenario: Holding boot-time configuration flags (e.g., UART baud rate, CAN node ID, watchdog timeout) in microcontroller-based HVAC controllers. IC Role / Device Role / Timing Role: Serial configuration store interfaced directly to MCU GPIOs; accessed once per power cycle. Use Value: Reduces BOM count by eliminating dedicated configuration jumpers or DIP switches; supports remote firmware updates of settings via host command interface. |
| Power Management Unit Settings | Consumer Appliance State Memory |
|
Use Scenario: Saving user-defined voltage/current limits and protection thresholds in DC-DC controller reference designs. IC Role / Device Role / Timing Role: Write-once or infrequent-write storage for safety-critical trip points; accessed during startup and fault recovery. Use Value: Ensures consistent protection behavior across power cycles; 1M endurance supports >10 years of daily configuration changes in lab test environments. |
Use Scenario: Retaining last-used cooking mode, timer value, and child-lock state in smart microwave ovens after AC power loss. IC Role / Device Role / Timing Role: Low-power nonvolatile memory written during UI interaction; read at wake-up to restore UI context. Use Value: Achieves <1 µA standby current at 1.8V - extends backup capacitor hold-up time and eliminates need for supercapacitor or coin-cell backup. |
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 | 4-Mbit SPI EEPROM, fixed 128 × 1024 organization, 20 MHz max clock, no ORG pin | Higher density, faster interface, but requires SPI master support and lacks hardware-configurable word size | Select when >1 Kbit capacity or higher throughput is needed; verify host supports SPI mode 0/3 and 8-bit addressing |
| 25AA010A-I/P | 1-Kbit SPI EEPROM, 1.8–5.5V, 10 MHz max clock, no ORG pin, same SOIC-8 package | Identical voltage range and package, but fixed 128 × 8 organization and SPI protocol instead of three-wire | Choose for SPI-native hosts where pin count allows SCK/MOSI/MISO/CS; not suitable if existing design relies on ORG pin configuration |
Compared with M95128-WMN6TP and 25AA010A-I/P, AT93C46DN-SH-T uniquely supports hardware-selectable memory mapping and uses a minimal three-wire interface-reducing MCU GPIO usage and enabling drop-in replacement in legacy Atmel-compatible designs without protocol conversion.
Availability
AT93C46DN-SH-T is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded controller configuration, and power management unit settings requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT93C46DN-SH-T 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 is a global semiconductor company specializing in microcontrollers, analog devices, and memory products, with a focus on reliability, low-power design, and long-term product availability.
The AT93C46D series was designed for cost-sensitive, space-constrained embedded systems requiring robust nonvolatile storage with flexible memory organization and wide voltage operation - particularly in industrial automation and consumer appliance markets.
FAQ
What is the function of the ORG pin on the AT93C46DN-SH-T?
The ORG pin on the AT93C46DN-SH-T selects internal memory organization: tying it to VCC configures the device as 64 × 16 (word mode), while tying it to GND configures it as 128 × 8 (byte mode). If left unconnected, the internal 1 MΩ pull-up defaults to x16 mode. This hardware-selectable feature eliminates firmware dependency for memory access alignment and is unique to the AT93C46D family - the AT93C46E variant omits this pin entirely.
Does the AT93C46DN-SH-T require external components for reliable operation?
No external components are required for basic operation of the AT93C46DN-SH-T. A 0.1 µF decoupling capacitor between VCC and GND near the package is recommended for noise suppression. Pull-up resistors on CS and SK are unnecessary - the device operates with direct GPIO drive. The ORG pin may optionally use a pull-up/down resistor for deterministic startup, but the internal 1 MΩ pull-up suffices for x16 default behavior.
How does the AT93C46DN-SH-T indicate write completion?
The AT93C46DN-SH-T signals write completion via the DO pin when CS is reasserted after initiating a WRITE or ERASE command. While the self-timed write cycle executes (≤5 ms), holding CS low keeps DO in high-impedance. After tCS minimum, bringing CS high causes DO to output logic '0' (busy) until completion, then logic '1' (ready). This Ready/Busy mechanism eliminates polling delays and allows precise timing of subsequent commands.
Is the AT93C46DN-SH-T compatible with 5V microcontrollers?
Yes, the AT93C46DN-SH-T is fully compatible with 5V microcontrollers: its VCC range spans 1.8V to 5.5V, and its input thresholds (VIH1 ≥ 2.0V, VIL1 ≤ 0.8V) meet standard 5V TTL logic levels. At 5V, it supports up to 2 MHz clock frequency and delivers VOL1 ≤ 0.4V and VOH1 ≥ 2.4V - ensuring noise margins >0.4V for robust communication without level shifters.
What is the maximum write endurance of the AT93C46DN-SH-T?
The AT93C46DN-SH-T guarantees a minimum write endurance of 1,000,000 cycles per memory location, characterized at 25°C and VCC = 5.0V. This specification ensures reliable operation in applications involving frequent parameter updates - such as calibration logging or usage counters - and supports greater than 10 years of daily writes (275 cycles/day) under industrial temperature conditions.
AT93C46DN-SH-T 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:
- 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:
- 5ms
- 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
AT93C46DN-SH-T FAQ
1.How can I place an order for AT93C46DN-SH-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46DN-SH-T 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 AT93C46DN-SH-T reliable?
The price and inventory of AT93C46DN-SH-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT93C46DN-SH-T is usually 5 days.
3.What payment methods are accepted for AT93C46DN-SH-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46DN-SH-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46DN-SH-T?
AT93C46DN-SH-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46DN-SH-T 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 AT93C46DN-SH-T?
For technical support, including AT93C46DN-SH-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46DN-SH-T requirements.
6.How does Aetrix verify that AT93C46DN-SH-T is sourced from the original manufacturer or authorized distributors?
All AT93C46DN-SH-T 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 AT93C46DN-SH-T meets industry standards.
7.What is the process for return or replacement of AT93C46DN-SH-T?
All AT93C46DN-SH-T units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46DN-SH-T, 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 AT93C46DN-SH-T part is unused and in its original packaging.
Return procedure for AT93C46DN-SH-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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