My Inquiry
My Account
Microchip Technology 24AA01HT-I/ST
- Part No.:
- 24AA01HT-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24AA01HT-I/ST.pdf
- Description:
- IC EEPROM 1KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,915
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
24AA01HT-I/ST from Microchip Technology Inc. is a 1 Kbit (128 × 8) I²C-compatible serial EEPROM designed for low-voltage embedded systems. It operates from 1.7V to 5.5V, supports up to 400 kHz clock frequency, features hardware write-protect for the upper half-array (40h–7Fh), and delivers ≤1 μA standby current at industrial temperature (−40°C to +85°C). It is commonly used in firmware storage, calibration data retention, and configuration memory in sensor modules and industrial controllers.
For engineers reviewing the 24AA01HT-I/ST datasheet, 24AA01HT-I/ST pinout, 24AA01HT-I/ST application, or 24AA01HT-I/ST equivalent, key selection criteria include its 1.7V minimum VCC, half-array hardware write-protection via WP pin, 8-pin TSSOP package with 4.4 mm body width, 1 million erase/write cycles, and guaranteed 200-year data retention - all validated for industrial-temperature operation.
Technical Context
The 24AA01HT-I/ST implements a true 2-wire I²C interface with Schmitt-trigger inputs on SDA and SCL for noise immunity, plus output slope control to suppress ground bounce. Its internal address counter enables sequential reads across the full 128-byte array without re-addressing.
It uses an on-chip charge pump for EEPROM programming, supports byte and page (up to 8 bytes) writes with typical 3 ms page write time, and includes a VCC threshold detector that disables write operations below ~1.5V to prevent data corruption during brown-out conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Kbit (128 × 8-bit array), organized as single block - simplifies addressing logic and eliminates block-select overhead. |
| Supply Voltage Range | 1.7V to 5.5V - enables direct interfacing with 1.8V, 3.3V, and 5V microcontrollers without level shifting. |
| I²C Clock Frequency | Up to 400 kHz (100 kHz when VCC < 2.5V) - balances speed and noise immunity in mixed-signal environments. |
| Write Endurance | ≥1,000,000 cycles - supports frequent calibration updates or logging in field-deployed equipment. |
| Data Retention | ≥200 years at +25°C - ensures long-term reliability for unattended or maintenance-free applications. |
| Standby Current | ≤1 μA at −40°C to +85°C - critical for battery-powered devices requiring multi-year shelf life. |
| Write-Protect Scope | Hardware-enabled protection of addresses 40h–7Fh (64 bytes) when WP = VCC - isolates critical firmware or security keys from accidental overwrite. |
Pinout & Package
24AA01HT-I/ST is supplied in an 8-lead Plastic Thin Shrink Small Outline (TSSOP) package, 4.4 mm body width, with standard 0.65 mm lead pitch. Pin 1 is marked by a beveled corner or dot; leads are gull-wing shaped and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1, A2 | Device Address Inputs | No internal connection - may be left floating or tied to VSS/VCC without affecting operation or I²C address (fixed at 1010xxx). |
| VSS | Ground Reference | Primary return path for all internal circuitry and I/O; must be low-impedance to support noise-suppressed I²C timing. |
| SDA | Serial Data I/O | Open-drain bidirectional bus line requiring external pull-up (2 kΩ typical for 400 kHz); carries address, command, and data. |
| SCL | Serial Clock Input | Master-generated clock synchronizing all transfers; Schmitt-trigger input ensures robust edge detection on noisy boards. |
| WP | Write-Protect Control | Logic-high (VCC) enables half-array protection (40h–7Fh); logic-low (VSS) enables full-array read/write - no software configuration required. |
| VCC | Power Supply | 1.7–5.5V supply powering EEPROM core, I/O buffers, and internal charge pump; includes brown-out detection below ~1.5V. |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | Functional down to 1.7V - eliminates need for voltage regulators in 1.8V systems and extends battery life in portable designs. |
| Hardware Write-Protection | Dedicated WP pin protects upper 64 bytes (40h–7Fh) without firmware intervention - prevents corruption of boot code or security keys. |
| Page Write Capability | Up to 8-byte burst writes reduce I²C transaction count and improve system-level throughput versus byte-by-byte programming. |
| Noise Immunity | Schmitt-trigger inputs + 50 ns input filter on SDA/SCL - tolerates >100 mV of bus noise without spurious Start/Stop generation. |
| ESD Robustness | ≥4 kV HBM rating - reduces risk of field failure during handling or in electrically harsh industrial environments. |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients and sensor linearization tables in temperature/humidity sensors. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed at power-up via I²C; no timing-critical startup dependency. Use Value: Enables plug-and-play sensor replacement with pre-loaded calibration - eliminates field recalibration labor and improves manufacturing yield. |
Use Scenario: Holding user-selected therapy parameters, device ID, and usage logs in portable infusion pumps. IC Role / Device Role / Timing Role: Secure, low-power data logger and settings store; WP pin locks critical safety thresholds against runtime modification. Use Value: Meets IEC 62304 Class B software requirements for persistent parameter integrity and audit-trail retention. |
| Smart Meter Firmware Patch Storage | Automotive Body Control Module Settings |
Use Scenario: Storing small firmware patches or cryptographic keys for secure over-the-air (OTA) updates in electricity meters. IC Role / Device Role / Timing Role: Read-only during normal operation; write-enabled only during authenticated update sequences via isolated I²C bus. Use Value: Provides tamper-resistant, field-upgradable code storage without requiring larger flash or external secure elements. |
Use Scenario: Retaining seat/mirror position presets, lighting profiles, and diagnostic fault codes in 12V automotive BCMs. IC Role / Device Role / Timing Role: Industrial-temp-rated EEPROM interfaced directly to 3.3V MCU I²C port; WP tied to ignition signal for runtime write lock. Use Value: Survives automotive thermal cycling (−40°C to +85°C) and meets AEC-Q100 stress requirements without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC01BHT-I/ST | Requires minimum 2.5V VCC; identical pinout, timing, and memory map - no PCB change needed. | Lacks 1.7V operation; unsuitable for 1.8V systems or deep-battery brown-out scenarios. | Select only if system VCC never drops below 2.5V and cost sensitivity outweighs low-voltage flexibility. |
| AT24C01D-SSHM-T | 1.7–5.5V operation and 400 kHz I²C, but uses different device address (1010000x) and lacks hardware WP pin - requires firmware-level protection. | Requires software-managed write lock; no dedicated hardware isolation for critical memory regions. | Choose when board space allows minor firmware adaptation and full-array write access is acceptable. |
Compared with 24AA01HT-I/ST, the 24LC01BHT-I/ST offers identical form/fit/function at higher VCC, while AT24C01D-SSHM-T trades hardware write-protection for broader vendor availability - making 24AA01HT-I/ST optimal where low-voltage resilience and hardware-enforced memory partitioning are mandatory.
Availability
24AA01HT-I/ST is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, smart meter firmware patch storage, and automotive body control module settings requiring stable component supply across extended product lifecycles.
Supply support for 24AA01HT-I/ST 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 Inc. is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions for embedded control applications.
The 24AA01H family was designed specifically for ultra-low-power, low-voltage I²C EEPROM applications in space-constrained industrial and consumer systems - prioritizing write endurance, data retention, and robust bus interface behavior.
FAQ
What is the minimum operating voltage for the 24AA01HT-I/ST?
The 24AA01HT-I/ST guarantees full functionality down to 1.7V across its industrial temperature range (−40°C to +85°C). Below approximately 1.5V, the internal VCC detector disables write operations to prevent data corruption, though read access remains possible until VCC falls below operational thresholds.
Does the 24AA01HT-I/ST require external pull-up resistors on SDA and SCL lines?
Yes, the 24AA01HT-I/ST has open-drain SDA and SCL outputs and requires external pull-up resistors. For 400 kHz operation, a 2 kΩ resistor to VCC is recommended; for 100 kHz, 10 kΩ is typical. Values must be selected based on bus capacitance and rise-time requirements per I²C specification.
How does the hardware write-protect feature work on the 24AA01HT-I/ST?
When the WP pin is tied to VCC, the 24AA01HT-I/ST hardware-write-protects memory addresses 40h through 7Fh (64 bytes), allowing reads but blocking writes to that region. Addresses 00h–3Fh remain fully writable. Pulling WP to VSS disables protection entirely - no firmware or command is needed.
Can the 24AA01HT-I/ST be used in automotive applications?
The 24AA01HT-I/ST is rated for industrial temperature (−40°C to +85°C), not automotive grade (−40°C to +125°C). For automotive use, Microchip's 24LC01BHT-E/ST variant is specified for the extended range and shares identical pinout and functionality - the 24AA01HT-I/ST itself is not qualified for under-hood deployment.
What is the maximum page write size supported by the 24AA01HT-I/ST?
The 24AA01HT-I/ST supports page writes of up to 8 bytes within a single physical page boundary. Attempting to write across a page boundary causes wraparound within the current page - application firmware must ensure word addresses do not cross 8-byte boundaries (e.g., 00h–07h, 08h–0Fh) during multi-byte writes.
24AA01HT-I/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Kbit
- Memory Organization:
- 128 x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 1.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
24AA01HT-I/ST FAQ
1.How can I place an order for 24AA01HT-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA01HT-I/ST 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 24AA01HT-I/ST reliable?
The price and inventory of 24AA01HT-I/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24AA01HT-I/ST is usually 5 days.
3.What payment methods are accepted for 24AA01HT-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA01HT-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA01HT-I/ST?
24AA01HT-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA01HT-I/ST 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 24AA01HT-I/ST?
For technical support, including 24AA01HT-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA01HT-I/ST requirements.
6.How does Aetrix verify that 24AA01HT-I/ST is sourced from the original manufacturer or authorized distributors?
All 24AA01HT-I/ST 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 24AA01HT-I/ST meets industry standards.
7.What is the process for return or replacement of 24AA01HT-I/ST?
All 24AA01HT-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24AA01HT-I/ST, 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 24AA01HT-I/ST part is unused and in its original packaging.
Return procedure for 24AA01HT-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24AA01HT-I/ST 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…
