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Microchip Technology AT93C46EN-SH-T
- Part No.:
- AT93C46EN-SH-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C46EN-SH-T.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:70,972
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Product details
Overview
AT93C46EN-SH-T from Microchip Technology is a 1-Kbit three-wire serial EEPROM with fixed 64 × 16 internal organization, operating from 1.8V to 5.5V over -40°C to +85°C. It supports 2 MHz clock rate at 5V, features 1,000,000 write cycles endurance and 100-year data retention, and is used for configuration storage in industrial control modules and embedded sensor nodes.
For engineers reviewing the AT93C46EN-SH-T datasheet, AT93C46EN-SH-T pinout, AT93C46EN-SH-T application, or AT93C46EN-SH-T equivalent, key selection considerations include its non-user-selectable x16 organization, absence of ORG pin, SOIC-8 packaging, and compatibility with legacy Atmel-compatible three-wire serial bus designs requiring low-voltage operation and high reliability.
Technical Context
The AT93C46EN-SH-T implements a synchronous three-wire serial interface (CS/SK/DI/DO) with no ORG pin-unlike the AT93C46D-locking memory organization to 64 words × 16 bits. It uses internal high-voltage generation for EEPROM programming and includes Power-on Reset (POR) circuitry ensuring command rejection until VCC stabilizes above 1.5 V.
Write operations are self-timed with maximum 5 ms duration and require explicit EWEN/EWDS command sequencing; DO pin provides Ready/Busy status during active erase/write when CS is reasserted after tCS delay. All DC/AC timing parameters-including tWP, tSKH, tDIS, and tPD-are fully specified across 1.8V–5.5V supply range and industrial temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1,024 bits organized as 64 × 16 (fixed x16 mode only) |
| Supply Voltage | 1.8V to 5.5V - enables direct interface with 1.8V, 2.7V, and 5V logic systems without level shifters |
| Max Clock Frequency | 2 MHz at 4.5–5.5V - supports fast configuration reads in time-critical boot sequences |
| Write Cycle Time | 0.1–5 ms - deterministic self-timed erase/write eliminates need for external timeout management |
| Endurance & Retention | 1,000,000 write cycles / 100 years data retention at 55°C - validated for long-life industrial deployments |
| Operating Temperature | -40°C to +85°C - qualified for use in automotive under-hood, factory automation, and outdoor IoT nodes |
| Interface Protocol | Three-wire serial (CS/SK/DI/DO) - minimal GPIO footprint, compatible with microcontroller SPI peripherals in 3-wire mode |
Pinout & Package
AT93C46EN-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 device has no exposed pad and requires standard SOIC reflow profile.
| 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 on SK rising edge; DO outputs on same edge |
| DI | Serial Data Input | Accepts instruction opcodes (READ/EWEN/ERASE/WRITE), addresses, and 16-bit data words |
| DO | Serial Data Output | Outputs read data or Ready/Busy status (logic '1' = ready, '0' = busy) when CS reasserted post-write |
| GND | Ground Reference | System ground return path; must be low-impedance connection to minimize noise coupling into EEPROM array |
| NC | No Connect | Pin 7 is unconnected internally - must be left floating or tied to GND/VCC per PCB layout best practice |
| VCC | Power Supply | Single-supply input: powers logic, EEPROM array, and charge pump; decoupling capacitor (0.1 µF) required near pin |
Key Features
| Feature | Design Value |
|---|---|
| Fixed x16 Organization | Eliminates ORG pin dependency and simplifies PCB routing - ideal for space-constrained designs where x16 addressing suffices |
| Low-Voltage Operation | Full functionality down to 1.8V enables direct integration with battery-powered or energy-harvesting subsystems |
| Industrial Temp Range | Guaranteed operation from -40°C to +85°C supports deployment in uncontrolled environments without thermal derating |
| Green Packaging | RoHS-compliant, halide-free, lead-free SOIC-8 meets global environmental compliance requirements for industrial OEMs |
| Self-Timed Write | Hardware-managed 5 ms max write cycle removes software polling overhead and guarantees deterministic timing behavior |
Applications
| Industrial PLC Configuration Storage | Smart Sensor Calibration Data |
|---|---|
|
Use Scenario: Storing I/O mapping tables, scaling coefficients, and firmware revision flags in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding critical startup parameters accessed during cold boot. Use Value: Ensures deterministic system initialization after power loss; 100-year retention prevents field recalibration. |
Use Scenario: Holding factory-trimmed offset/gain values and temperature compensation curves for MEMS accelerometers. IC Role / Device Role / Timing Role: Calibration data vault accessed once per sensor power-up before ADC conversion begins. Use Value: Enables ±0.1% measurement accuracy without host MCU intervention; x16 organization matches typical 16-bit calibration word size. |
| Medical Device Parameter Backup | Consumer Appliance Settings Memory |
|
Use Scenario: Preserving user-adjusted therapy settings (e.g., pressure thresholds, alarm limits) in portable respiratory devices. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter store updated only during clinician setup mode. Use Value: Meets IEC 62304 Class B safety requirements via 1M-cycle endurance and lockable write protection sequence. |
Use Scenario: Retaining user preferences (cook time, temperature presets, language selection) across AC power cycles in smart ovens. IC Role / Device Role / Timing Role: Low-power standby memory accessed infrequently but requiring instant availability on wake-up. Use Value: Sub-1 µA standby current at 1.8V extends battery backup life; SOIC-8 footprint fits tight front-panel PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT93C46DN-SH-T | Same die, identical x16 organization and SOIC-8 package; differs only in tape-and-reel packaging (N vs T suffix) | No functional difference - suitable for same PCBs and firmware; selected based on assembly line feeding requirements | Choose AT93C46DN-SH-T for automated SMT placement with reel-fed feeders; AT93C46EN-SH-T is tube-packaged for manual or semi-auto insertion. |
| M95128-WMN6TP | 4× larger capacity (128 Kbit), SPI interface (4-wire), 5 MHz max clock, but requires separate HOLD and WP pins | Not drop-in: different pinout (8-pin SOIC but pin 7 = HOLD, pin 8 = WP), incompatible command set, and higher VCC min (2.5V) | Select only if design requires >1 Kbit or SPI-native interface; migration requires PCB redesign and firmware driver rewrite. |
Compared with AT93C46EN-SH-T, AT93C46DN-SH-T offers identical electrical and functional behavior with packaging variation only, while M95128-WMN6TP delivers higher density and speed at the cost of interface incompatibility and increased pin count-making it unsuitable for direct replacement.
Availability
AT93C46EN-SH-T is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostic instruments, smart home appliances, and embedded sensor nodes requiring stable component supply across multi-year production cycles.
Supply support for AT93C46EN-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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with ISO 9001-certified manufacturing and global distribution.
The AT93C46EN-SH-T belongs to Microchip's legacy Atmel EEPROM product line, designed specifically for cost-sensitive, low-power, and high-reliability applications in industrial and consumer electronics where simple three-wire serial configuration storage is required.
FAQ
What is the memory organization of AT93C46EN-SH-T?
The AT93C46EN-SH-T has a fixed internal organization of 64 words × 16 bits (1,024 bits total). Unlike the AT93C46D, it lacks an ORG pin and does not support user-selectable x8/x16 modes. This fixed x16 structure simplifies hardware design and ensures consistent addressing behavior across all units of AT93C46EN-SH-T.
Does AT93C46EN-SH-T support 1.8V operation?
Yes, AT93C46EN-SH-T fully supports 1.8V operation across its entire industrial temperature range (-40°C to +85°C). At 1.8V, it operates with reduced clock frequency (max 250 kHz), guaranteed read/write functionality, and sub-1 µA standby current-making it suitable for battery-backed or ultra-low-power embedded systems.
What is the purpose of the NC pin on AT93C46EN-SH-T?
Pin 7 on AT93C46EN-SH-T is designated NC (No Connect) and is unconnected internally. It must be left floating or tied to GND/VCC per board-level EMI mitigation practices. This pin corresponds to the ORG pin on the AT93C46D variant but is omitted in the AT93C46E family-including AT93C46EN-SH-T-to enforce fixed x16 organization.
How does write protection work on AT93C46EN-SH-T?
AT93C46EN-SH-T uses command-based write protection: the EWEN (Erase/Write Enable) instruction must be issued before any ERASE or WRITE command, and EWDS (Erase/Write Disable) must follow to lock the array. There is no hardware write-protect pin; protection relies entirely on correct command sequencing and software discipline to prevent accidental writes.
Is AT93C46EN-SH-T RoHS compliant?
Yes, AT93C46EN-SH-T is RoHS compliant, lead-free, and halide-free. Its SOIC-8 package meets EU Directive 2011/65/EU and is certified for green manufacturing. The "-SH-T" suffix explicitly denotes the RoHS-compliant, tape-and-reel packaged version-verified in Microchip's official packaging specification documents.
AT93C46EN-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:
- 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
AT93C46EN-SH-T FAQ
1.How can I place an order for AT93C46EN-SH-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46EN-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 AT93C46EN-SH-T reliable?
The price and inventory of AT93C46EN-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 AT93C46EN-SH-T is usually 5 days.
3.What payment methods are accepted for AT93C46EN-SH-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46EN-SH-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46EN-SH-T?
AT93C46EN-SH-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46EN-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 AT93C46EN-SH-T?
For technical support, including AT93C46EN-SH-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46EN-SH-T requirements.
6.How does Aetrix verify that AT93C46EN-SH-T is sourced from the original manufacturer or authorized distributors?
All AT93C46EN-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 AT93C46EN-SH-T meets industry standards.
7.What is the process for return or replacement of AT93C46EN-SH-T?
All AT93C46EN-SH-T units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46EN-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 AT93C46EN-SH-T part is unused and in its original packaging.
Return procedure for AT93C46EN-SH-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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