My Inquiry
My Account
Microchip Technology AT93C46A-10TU-1.8
- Part No.:
- AT93C46A-10TU-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT93C46A-10TU-1.8.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,130
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT93C46A-10TU-1.8 from Microchip Technology (formerly Atmel) is a 1K-bit (64 × 16) three-wire serial EEPROM optimized for low-voltage embedded systems. It operates from 1.8V to 5.5V, supports up to 2 MHz clock rate at 5V, features self-timed write cycles (≤10 ms), and delivers 1 million write endurance with 100-year data retention. It is used in industrial control modules for parameter storage and calibration data persistence.
For engineers reviewing the AT93C46A-10TU-1.8 datasheet, AT93C46A-10TU-1.8 pinout, AT93C46A-10TU-1.8 application, or AT93C46A-10TU-1.8 equivalent, key selection criteria include 1.8V minimum supply compatibility, TSSOP-8 packaging, three-wire interface timing constraints, and automotive-grade temperature range (−40°C to +85°C).
Technical Context
The AT93C46A-10TU-1.8 implements a synchronous three-wire serial interface with Chip Select (CS), Serial Clock (SK), and bidirectional Data I/O (DI/DO). It decodes seven instruction opcodes-including READ, WRITE, ERASE, EWEN, and EWDS-to manage memory access and programming states without external erase cycles.
Its internal architecture includes a 64 × 16 memory array, address decoder, mode decode logic, and output buffer. Ready/busy status is reported via DO during CS high transitions after write/erase initiation, enabling host synchronization without polling overhead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (64 words × 16 bits); supports compact configuration storage in space-constrained PCBs. |
| Supply Voltage Range | 1.8V to 5.5V; enables direct interfacing with 1.8V logic families and mixed-voltage systems. |
| Interface Type | Three-wire serial (CS/SK/DI/DO); reduces MCU GPIO count and simplifies routing versus SPI or I²C. |
| Max Clock Frequency | 2 MHz at VCC = 5V; ensures fast read/write throughput while maintaining timing margin at lower voltages. |
| Write Cycle Time | ≤10 ms (self-timed); eliminates need for external write-complete polling or timeout management in firmware. |
| Endurance & Retention | 1 million write cycles / 100-year data retention; suitable for field-updatable calibration tables in industrial equipment. |
| Operating Temperature | −40°C to +85°C; qualified for industrial and automotive under-hood applications. |
Pinout & Package
AT93C46A-10TU-1.8 is housed in an 8-lead Thin Shrink Small Outline Package (TSSOP), 4.4 mm body width, lead-free/halogen-free, compliant with JEDEC MO-153 variation AA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; device enters standby when high, reducing current to ≤20 µA at 1.8V. |
| SK | Serial Clock | Input clock synchronizing all data transfers; min/max pulse widths defined per voltage grade (e.g., 1000 ns low/high at 1.8V). |
| DI | Data Input | Serial instruction and address input; accepts start bit + opcode + 6-bit address per READ/WRITE command. |
| DO | Data Output | Serial data output (READ) or ready/busy status (logic "0" = busy, "1" = ready) when CS rises mid-cycle. |
| GND | Ground Reference | Return path for VCC and signal currents; requires low-impedance connection to minimize noise coupling. |
| VCC | Power Supply | Single-supply input; supports 1.8–5.5V operation with specified DC/AC characteristics across full range. |
| NC | No Connect | Internally unconnected pin; must remain floating or tied to GND per layout guidelines-no active function. |
| DC | Device Configuration | Factory-programmed pin determining memory organization (x16 mode only for AT93C46A); not user-modifiable. |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation down to 1.8V | Enables integration into battery-powered or ultra-low-power microcontroller subsystems without level-shifting. |
| Self-timed write/erase cycles | Removes requirement for precise firmware timing loops or external delay components during programming sequences. |
| Erase/write enable/disable protocol | Prevents accidental overwrites via explicit EWEN/EWDS commands-critical for field-deployed firmware safety. |
| Ready/busy status reporting on DO | Allows host to detect completion asynchronously, reducing CPU utilization versus fixed-delay polling. |
| Automotive-grade temperature range | Validated for continuous operation from −40°C to +85°C, supporting industrial automation and vehicle ECUs. |
Applications
| Industrial Sensor Calibration | Medical Device Configuration Storage |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and user-adjusted thresholds in programmable pressure transducers. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during power-up initialization and runtime reconfiguration. Use Value: Maintains accuracy across 100-year retention and survives 1M field updates without degradation-eliminating recalibration service visits. | Use Scenario: Holding patient-specific therapy parameters and device serialization data in portable infusion pumps. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory for FDA-required audit logs and operational settings. Use Value: 1.8V compatibility allows direct connection to low-power ARM Cortex-M0+ MCUs, reducing BOM count and board area. |
| Automotive Body Control Module | Smart Energy Meter Firmware Settings |
Use Scenario: Saving seat/mirror position presets and lighting profiles in 12V automotive BCMs with wide-input DC-DC supplies. IC Role / Device Role / Timing Role: Persistent memory for user preferences and fault-code history with extended temperature resilience. Use Value: Qualified to −40°C to +85°C and withstands load-dump transients via robust ESD protection-ensuring reliability in harsh environments. | Use Scenario: Storing tariff schedules, meter ID, and cryptographic keys in ANSI C12.19-compliant smart meters. IC Role / Device Role / Timing Role: Secure boot-time configuration store with hardware-level write-protection enforcement. Use Value: Three-wire interface minimizes routing congestion on dense meter PCBs; TSSOP-8 footprint saves >30% area vs. SOIC-8. |
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 | 256K-bit SPI interface, 2.5–5.5V supply, 20 MHz max clock; no 1.8V support. | Higher density but requires SPI-capable MCU; incompatible pinout and protocol stack. | Select when >1K memory or faster throughput is required and 1.8V operation is not mandatory. |
| BR24G02FJ-WE2 | I²C interface, 2K-bit, 1.7–5.5V, 400 kHz standard mode; lacks ready/busy status reporting. | Requires I²C bus arbitration and pull-up resistors; no asynchronous status feedback during writes. | Choose for systems already using I²C infrastructure and where firmware can tolerate fixed 5ms write delays. |
Compared with M95128-DRMN6TP/K and BR24G02FJ-WE2, the AT93C46A-10TU-1.8 uniquely balances 1.8V operation, three-wire simplicity, and ready/busy signaling-making it optimal for resource-constrained, low-voltage industrial controllers where pin count and voltage headroom are critical.
Availability
AT93C46A-10TU-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, and smart energy meter firmware settings requiring stable component supply across long production lifecycles.
Supply support for AT93C46A-10TU-1.8 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 for industrial, automotive, and consumer markets.
The AT93C46A series belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-pin-count embedded systems needing reliable, low-voltage configuration storage.
FAQ
What is the maximum clock frequency supported by AT93C46A-10TU-1.8?
The AT93C46A-10TU-1.8 supports up to 2 MHz clock frequency at VCC = 5.0V. At 1.8V, the maximum SK clock rate drops to 250 kHz per AC specifications. This voltage-dependent timing ensures reliable operation across its full 1.8–5.5V supply range without external clock dividers or voltage translation.
Does AT93C46A-10TU-1.8 require an external erase cycle before writing?
No, the AT93C46A-10TU-1.8 does not require a separate erase cycle before writing. Its self-timed write operation automatically handles erasure and programming in a single step. The write cycle completes within 10 ms maximum, and the DO pin reports ready/busy status if CS is raised during execution.
What package type is used for AT93C46A-10TU-1.8?
The AT93C46A-10TU-1.8 uses an 8-lead Thin Shrink Small Outline Package (TSSOP), designated JEDEC MO-153 variation AA. Its 4.4 mm body width and 0.65 mm lead pitch provide a compact, surface-mount solution compatible with automated assembly and high-density PCB layouts.
How is write protection implemented in AT93C46A-10TU-1.8?
Write protection in AT93C46A-10TU-1.8 is enforced through an explicit Erase/Write Disable (EWDS) instruction. After power-up, the device defaults to EWDS state. An Erase/Write Enable (EWEN) command must be issued first to allow programming; EWDS must be re-executed afterward to prevent accidental writes-providing deterministic, software-controlled security.
Can AT93C46A-10TU-1.8 operate reliably at −40°C?
Yes, the AT93C46A-10TU-1.8 is rated for operation from −40°C to +85°C and is qualified as automotive-grade. Its DC and AC characteristics-including standby current, clock timing, and output drive-are guaranteed across this full industrial temperature range, making it suitable for outdoor and under-hood applications.
AT93C46A-10TU-1.8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- 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:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
AT93C46A-10TU-1.8 FAQ
1.How can I place an order for AT93C46A-10TU-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46A-10TU-1.8 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-10TU-1.8 reliable?
The price and inventory of AT93C46A-10TU-1.8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT93C46A-10TU-1.8 is usually 5 days.
3.What payment methods are accepted for AT93C46A-10TU-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46A-10TU-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46A-10TU-1.8?
AT93C46A-10TU-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46A-10TU-1.8 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-10TU-1.8?
For technical support, including AT93C46A-10TU-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46A-10TU-1.8 requirements.
6.How does Aetrix verify that AT93C46A-10TU-1.8 is sourced from the original manufacturer or authorized distributors?
All AT93C46A-10TU-1.8 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-10TU-1.8 meets industry standards.
7.What is the process for return or replacement of AT93C46A-10TU-1.8?
All AT93C46A-10TU-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46A-10TU-1.8, 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-10TU-1.8 part is unused and in its original packaging.
Return procedure for AT93C46A-10TU-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT93C46A-10TU-1.8 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…
