My Inquiry
My Account
Microchip Technology AT93C46A-10PI
- Part No.:
- AT93C46A-10PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT93C46A-10PI.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 2MHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,648
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT93C46A-10PI from Microchip Technology (formerly Atmel) is a 1K-bit (64 × 16) three-wire serial EEPROM optimized for low-voltage industrial applications. It operates from 2.7V to 5.5V, supports up to 2 MHz clock rate at 5V, features self-timed write cycles (≤10 ms), and delivers 1 million write cycles with 100-year data retention. It is used in microcontroller configuration storage, calibration data logging, and power-management parameter backup.
For engineers reviewing the AT93C46A-10PI datasheet, AT93C46A-10PI pinout, AT93C46A-10PI application, or AT93C46A-10PI equivalent, key selection criteria include its 2.7–5.5V supply range, PDIP-8 package, 16-bit word organization, automotive-grade temperature rating (−40°C to +85°C), and compatibility with legacy three-wire host interfaces requiring no external timing control.
Technical Context
The AT93C46A-10PI implements a synchronous three-wire serial interface (CS/SK/DI/DO) with instruction-based addressing and status feedback via DO pin. Its internal architecture includes a 64-word × 16-bit memory array, address decoder, mode logic, and clock generator enabling deterministic read/write/erase operations without external erase cycles.
It supports seven instructions-READ, EWEN, ERASE, WRITE, ERAL, WRAL, and EWDS-with voltage-dependent validity (e.g., ERAL/WRAL only at 4.5–5.5V). Ready/busy status is returned on DO when CS is asserted after tCS ≥ 250 ns during self-timed programming, enabling host polling without fixed delays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (64 words × 16 bits); enables compact storage of calibration coefficients or device IDs in space-constrained designs. |
| Supply Voltage Range | 2.7V to 5.5V; supports direct interfacing with 3.3V and 5V microcontrollers without level-shifting. |
| Max Clock Frequency | 2 MHz at VCC = 5V; allows fast serial access while maintaining compatibility with legacy 8-bit MCU SPI-like peripherals. |
| Write Cycle Time | ≤10 ms (self-timed); eliminates need for host-controlled timing loops or external watchdogs during writes. |
| Endurance | 1 million write cycles; suitable for field-updatable parameters updated daily over 27 years. |
| Data Retention | 100 years at +25°C; ensures long-term reliability in unpowered storage of critical system settings. |
| Operating Temperature | −40°C to +85°C; qualified for industrial and automotive under-hood environments. |
Pinout & Package
AT93C46A-10PI is supplied in an 8-lead PDIP (package code 8P3) with 0.300" body width and standard through-hole mounting. Pin 1 is marked by corner notch or dot; leads are gull-wing shaped with 0.100" pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable: must be held low for entire instruction sequence; controls DO output impedance and ready/busy reporting. |
| SK | Serial Clock | Synchronizes all data transfers; rising edge samples DI and clocks DO; max frequency 2 MHz at 5V. |
| DI | Data Input | Receives start bit, op code, address, and write data; latched on SK rising edge. |
| DO | Data Output | Outputs read data (with leading dummy bit) or ready/busy status (logic 1 = ready, 0 = busy). |
| GND | Ground Reference | Return path for VCC and I/O; requires low-impedance connection to minimize noise coupling into serial interface. |
| VCC | Power Supply | Supplies core logic and memory array; decoupling capacitor (0.1 µF) required within 10 mm of pin. |
| DC | Don't Connect | No internal connection; must remain floating or tied to GND per design guidelines to avoid leakage paths. |
| NC | No Connect | Internally unconnected; electrically isolated; may be left unconnected or grounded for mechanical stability. |
Key Features
| Feature | Design Value |
|---|---|
| Three-wire serial interface | Reduces MCU GPIO usage to just CS/SK/DI/DO - no chip-select decoding logic or parallel bus overhead required. |
| Self-timed write cycle | Eliminates need for precise host timing control; DO pin provides real-time status feedback for efficient polling. |
| Erase/write protection | EWEN/EWDS instructions prevent accidental overwrites; programming disabled by default on power-up for data integrity. |
| Low-power standby current | 14–50 µA across 1.8–5.0V supply range; enables battery-backed operation in always-on systems. |
| Automotive-grade qualification | Rated for −40°C to +85°C operation with 100-year data retention; meets AEC-Q100 stress test requirements for industrial reliability. |
Applications
| Motor Control Configuration | Industrial Sensor Calibration |
|---|---|
Use Scenario: Storing motor phase alignment offsets, PID tuning constants, and fault history in BLDC driver modules. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during boot and runtime reconfiguration. Use Value: Enables field recalibration without firmware update; retains settings across power cycles and thermal stress. | Use Scenario: Recording factory-trimmed gain/offset values and temperature compensation coefficients for analog sensor front-ends. IC Role / Device Role / Timing Role: Persistent parameter store queried at system startup before ADC initialization. Use Value: Eliminates need for external trimming components; supports multi-point calibration with 16-bit precision per channel. |
| Power Supply Sequencing | Embedded System Bootloader Settings |
Use Scenario: Holding soft-start delay times, rail enable order, and overvoltage thresholds in multi-rail DC/DC controllers. IC Role / Device Role / Timing Role: Configuration memory mapped into power management IC's control logic via dedicated serial interface. Use Value: Allows OEM-specific sequencing profiles without hardware changes; supports dynamic updates via service port. | Use Scenario: Storing secure boot keys, firmware version locks, and recovery partition pointers in resource-constrained microcontrollers. IC Role / Device Role / Timing Role: Trusted nonvolatile storage accessed early in boot sequence prior to RAM initialization. Use Value: Provides tamper-resistant parameter storage with 1M endurance for frequent OTA update tracking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95128-DRMN6TP/K | 128 Kbit (16K × 8), SPI interface, 5 MHz max clock, 1.8–5.5V supply | Higher density, faster interface, but requires SPI-compatible host; incompatible pinout and protocol | Select when >1K storage or SPI-native host is available; not drop-in compatible with AT93C46A-10PI. |
| STMicro M95010-WMN6TP | 1 Kbit (128 × 8), SPI interface, 2.5–5.5V supply, 5 ms max write time | Same capacity but 8-bit organization; lacks ERAL/WRAL instructions and voltage-flexible op-code encoding | Choose for SPI-based designs needing minimal footprint; requires firmware adaptation for 8-bit vs. 16-bit word access. |
Compared with M95128-DRMN6TP/K and M95010-WMN6TP, the AT93C46A-10PI offers native 16-bit word access, three-wire simplicity, and dual-voltage support (1.8V/2.7V variants), making it optimal for legacy MCU platforms with limited GPIO and strict low-power constraints.
Availability
AT93C46A-10PI is available at Aetrix Electronics and suitable for industrial motor drives, sensor calibration modules, and embedded power management systems requiring stable component supply, long-lifecycle assurance, and RoHS-compliant through-hole packaging.
Supply support for AT93C46A-10PI 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 nonvolatile memory solutions, with broad industrial and automotive qualification coverage.
The AT93C46A product line delivers cost-effective, low-pin-count serial EEPROMs designed specifically for configuration storage in resource-constrained embedded systems where pin count, power, and reliability are critical.
FAQ
What is the operating voltage range for the AT93C46A-10PI?
The AT93C46A-10PI operates from 2.7V to 5.5V, supporting both 3.3V and 5V system rails without level translation. This range is confirmed in Table 3 of the datasheet (VCC2 parameter), and the "−2.7" suffix in the ordering code explicitly denotes this voltage grade. The AT93C46A-10PI does not support 1.8V operation - that variant is designated AT93C46A-10PI-1.8.
Does the AT93C46A-10PI require an external erase cycle before writing?
No, the AT93C46A-10PI does not require a separate erase cycle. Each WRITE instruction automatically erases and reprograms the target 16-bit word in a single self-timed operation (≤10 ms). The ERASE instruction is optional and only needed when setting specific locations to 0xFFFF without writing new data. This behavior is documented in the Functional Description section and timing diagrams for WRITE and ERASE.
What package type is used for the AT93C46A-10PI?
The AT93C46A-10PI uses an 8-lead PDIP (Plastic Dual Inline Package) with 0.300" body width (JEDEC MS-001 BA compliant, package code 8P3). This through-hole package is explicitly listed in the Ordering Information table and illustrated in Drawing 8P3 on page 11 of the datasheet. It is distinct from SOIC (8S1) and TSSOP (8A2) variants.
How does the AT93C46A-10PI indicate write completion status?
The AT93C46A-10PI outputs ready/busy status on the DO pin: a logic high ('1') indicates completion, and logic low ('0') indicates ongoing programming. To read this status, the host must hold CS low for ≥250 ns (tCS), then drive CS high while monitoring DO. This mechanism is defined in the Functional Description and verified in Figures 6–9 of the datasheet.
Is the AT93C46A-10PI pin-compatible with other members of the AT93Cxx family?
Yes, the AT93C46A-10PI shares identical pinout and interface protocol with AT93C46A-10SI-2.7 and AT93C46A-10TI-2.7 - differing only in package (SOIC/TSSOP) and not function or pin assignment. However, it is not pin-compatible with AT93C56A or AT93C66A due to different memory sizes and instruction encoding; those require distinct address widths and timing margins.
AT93C46A-10PI 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT93C46A-10PI FAQ
1.How can I place an order for AT93C46A-10PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46A-10PI 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 AT93C46A-10PI reliable?
The price and inventory of AT93C46A-10PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT93C46A-10PI is usually 5 days.
3.What payment methods are accepted for AT93C46A-10PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46A-10PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46A-10PI?
AT93C46A-10PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46A-10PI 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 AT93C46A-10PI?
For technical support, including AT93C46A-10PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46A-10PI requirements.
6.How does Aetrix verify that AT93C46A-10PI is sourced from the original manufacturer or authorized distributors?
All AT93C46A-10PI 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 AT93C46A-10PI meets industry standards.
7.What is the process for return or replacement of AT93C46A-10PI?
All AT93C46A-10PI units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46A-10PI, 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 AT93C46A-10PI part is unused and in its original packaging.
Return procedure for AT93C46A-10PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT93C46A-10PI 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…
