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Microchip Technology AT24C16C-XHM-T
- Part No.:
- AT24C16C-XHM-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT24C16C-XHM-T.pdf
- Description:
- IC EEPROM 16KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:24,179
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Product details
Overview
AT24C16C-XHM-T from Microchip Technology is a 16-Kbit I²C-compatible serial EEPROM organized as 2,048 × 8 bits, operating from 1.7V to 5.5V across -40°C to +85°C. It supports Standard (100 kHz), Fast (400 kHz), and Fast Mode Plus (1 MHz) I²C speeds, features hardware write protection via WP pin, and delivers ultra-low standby current (6 μA max) for battery-backed data logging and configuration storage in embedded controllers.
For engineers reviewing the AT24C16C-XHM-T datasheet, AT24C16C-XHM-T pinout, AT24C16C-XHM-T application, or AT24C16C-XHM-T equivalent, key selection criteria include its 8-pin XDFN package with exposed pad, 16-byte page write capability, self-timed 5 ms max write cycle, Schmitt-triggered noise-immune inputs, and full-array hardware write protection - all validated for industrial-grade reliability.
Technical Context
The AT24C16C-XHM-T implements a true I²C slave interface with open-drain SDA/SCL pins requiring external pull-ups, integrated spike suppression filters and Schmitt triggers on both inputs, and a dedicated WP pin that disables writes when pulled high. Its memory is partitioned into 128 pages of 16 bytes each, enabling partial-page writes within the same physical row (A10–A4 unchanged).
Internally, it includes a Power-on Reset (POR) circuit with 1.5 V threshold and 100 µs tPUP delay, automatic address incrementing during sequential reads/writes, and an ACK/NACK protocol requiring nine clock cycles per byte. The device enters Standby mode after Stop condition or power-up completion and draws ≤1.0 µA at 1.7 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2,048 × 8), directly addressable via 11-bit word address |
| Supply Voltage | 1.7 V to 5.5 V - enables single-supply operation across 1.8 V, 3.3 V, and 5 V systems |
| I²C Speed Modes | 100 kHz (1.7–5.5 V), 400 kHz (1.7–5.5 V), 1 MHz FM+ (2.5–5.5 V) - supports mixed-voltage bus designs |
| Write Cycle Time | ≤5 ms - enables deterministic firmware timeout handling without polling overhead |
| Endurance & Retention | 1,000,000 write cycles / 100 years data retention at 55°C - qualified for long-life industrial deployments |
| Current Consumption | 3 mA active max (5 V, 100 kHz read), 6 μA standby max (5.5 V) - extends battery life in always-on nodes |
| ESD Protection | >4,000 V HBM - meets IEC 61000-4-2 Level 3 for robust board-level immunity |
Pinout & Package
AT24C16C-XHM-T is housed in an 8-pad XDFN package (2.0 mm × 1.6 mm, 0.5 mm pitch) with exposed thermal pad (recommended connected to GND). Pin 1 is marked by a dot; pin 1 = NC, pin 2 = NC, pin 3 = NC, pin 4 = GND, pin 5 = SDA, pin 6 = SCL, pin 7 = WP, pin 8 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| NC (1–3) | No-connect | Unused die bond pads; must be left floating or tied to GND - no electrical function |
| GND (4) | Ground reference | Primary return path for VCC and I/O; requires low-impedance connection to system ground plane |
| SDA (5) | Serial Data bidirectional I/O | Open-drain output/input; requires external pull-up (≤10 kΩ); shares bus with other I²C slaves |
| SCL (6) | Serial Clock input | Master-generated clock; rising edge latches input, falling edge clocks out data; pull-up required |
| WP (7) | Hardware write-protect control | Pulled down internally; drives high to disable all writes - prevents accidental overwrites during power transients |
| VCC (8) | Power supply input | Accepts 1.7–5.5 V; decoupling capacitor (0.1 µF) required within 5 mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| 16-byte page write with wraparound | Enables efficient bulk writes within one physical page (A10–A4 constant); avoids inter-page delays |
| Schmitt-triggered, filtered I/O | Rejects >100 ns noise spikes on SDA/SCL - eliminates false Start/Stop detection in noisy industrial environments |
| Dedicated WP pin with internal pull-down | Guarantees safe default state (write-enabled) while allowing explicit hardware lockout - no external bias needed |
| 1.7 V minimum VCC operation | Supports direct interface with 1.8 V microcontrollers without level shifters - reduces BOM count and layout complexity |
| Green RoHS-compliant packaging | Lead-free, halide-free XDFN package - satisfies IPC/JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) |
Applications
| Industrial Sensor Node | Medical Device Calibration Storage |
|---|---|
Use Scenario: Storing calibrated offset/gain coefficients and sensor ID in battery-powered wireless temperature/humidity nodes deployed in factory floors. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed at boot and during field recalibration; retains data through 10+ year deployments. Use Value: 100-year data retention and 1M endurance ensure calibration integrity across product lifetime without service intervention. | Use Scenario: Holding FDA-mandated calibration history, user preferences, and fault logs in portable ECG monitors with coin-cell backup. IC Role / Device Role / Timing Role: Secure parameter vault with hardware write-protection activated during clinical use to prevent tampering. Use Value: WP pin hard-locks memory during operation - meets IEC 62304 software safety requirements for Class B devices. |
| Smart Energy Meter | Automotive Body Control Module |
Use Scenario: Recording tariff schedules, meter firmware version, and tamper-event timestamps in DIN-rail mounted electricity meters. IC Role / Device Role / Timing Role: Industrial-grade EEPROM interfacing directly to 3.3 V MCU over I²C; withstands wide ambient temperature swings. Use Value: -40°C to +85°C rating and 6 μA standby current enable reliable operation in unconditioned outdoor enclosures. | Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in 12 V automotive BCMs with local 3.3 V LDO regulation. IC Role / Device Role / Timing Role: Configuration memory accessed during ignition-on initialization; survives load-dump transients via robust ESD design. Use Value: >4 kV HBM ESD rating and 1.7 V min VCC allow direct connection to 3.3 V domain without additional protection circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C16D-XHM-T | Same 16-Kbit capacity and XDFN-8 package; updated revision with enhanced ESD (6 kV HBM) and tighter tWR spec (4.5 ms max) | Preferred for new designs requiring higher ESD robustness or faster write confirmation | Select AT24C16D-XHM-T if qualification testing mandates ≥6 kV HBM or sub-5 ms write-cycle predictability |
| M95128-DFMN6TP | 128-Kbit SPI EEPROM in same 8-pin XDFN; requires SPI interface instead of I²C; no WP pin - uses software protection only | Suitable where MCU has SPI but limited I²C resources; lacks hardware write lock for critical parameters | Choose M95128-DFMN6TP only if SPI bus is available and hardware WP is not required for functional safety compliance |
Compared with AT24C16C-XHM-T, the AT24C16D-XHM-T offers improved ESD margin and slightly faster write timing but identical pinout and firmware compatibility; the M95128-DFMN6TP provides greater density and SPI flexibility but sacrifices I²C interoperability and hardware write protection - making it unsuitable for safety-critical parameter storage.
Availability
AT24C16C-XHM-T is available at Aetrix Electronics and suitable for industrial sensor nodes, medical calibration storage, smart energy meters, automotive body control modules, and portable instrumentation requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AT24C16C-XHM-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 Inc. is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with ISO 9001-certified manufacturing and global distribution.
The AT24C16C-XHM-T belongs to Microchip's AT24Cxx family of I²C serial EEPROMs, designed specifically for low-power, space-constrained embedded systems requiring reliable, byte-addressable nonvolatile storage with minimal external components.
FAQ
What is the package type and footprint of the AT24C16C-XHM-T?
The AT24C16C-XHM-T uses an 8-pad XDFN package measuring 2.0 mm × 1.6 mm with 0.5 mm pitch and an exposed thermal pad. Its footprint matches JEDEC MO-229WEED-1, and the pad is recommended to be connected to GND for thermal and EMI performance. Pin 1 is marked by a dot; pins 1–3 are no-connect, pin 4 is GND, pin 5 is SDA, pin 6 is SCL, pin 7 is WP, and pin 8 is VCC. This compact package enables high-density PCB layouts in wearables and IoT edge nodes.
Does the AT24C16C-XHM-T support I²C Fast Mode Plus (1 MHz)?
Yes, the AT24C16C-XHM-T supports I²C Fast Mode Plus up to 1 MHz, but only when VCC is between 2.5 V and 5.5 V. At 1.7–2.4 V, maximum speed is limited to 400 kHz (Fast Mode). This voltage-dependent speed scaling ensures signal integrity across the full operating range. The device meets I²C specification timing requirements including tLOW (500 ns min), tHIGH (400 ns min), and tR/tF (≤300 ns), and requires appropriate pull-up resistors (e.g., 1.3 kΩ for 1 MHz) per bus capacitance.
How does the Write-Protect (WP) pin function on the AT24C16C-XHM-T?
The WP pin on the AT24C16C-XHM-T is an active-high hardware lock: when driven to VCC, it disables all write operations to the entire memory array; when grounded or left floating, writes are enabled. Internally, the pin is pulled down, so floating defaults to write-enabled - but Microchip recommends tying it to a known state (GND or VCC via ≤10 kΩ resistor) to prevent noise-induced glitches. Unlike software locks, WP operates independently of I²C commands and remains effective even during power transitions or bus faults.
What is the maximum write endurance and data retention for the AT24C16C-XHM-T?
The AT24C16C-XHM-T is rated for 1,000,000 write cycles per memory location and guarantees 100 years of data retention at 55°C - verified per JEDEC JESD22-A117 stress testing. These figures apply across the full industrial temperature range (-40°C to +85°C) and 1.7–5.5 V supply. Endurance is measured using page-write patterns under worst-case voltage/temperature conditions, and retention is extrapolated from accelerated high-temperature testing with statistical confidence. No derating is required for typical embedded use cases.
Can the AT24C16C-XHM-T operate reliably at 1.7 V supply voltage?
Yes, the AT24C16C-XHM-T is fully specified and tested down to 1.7 V, supporting I²C Standard Mode (100 kHz) and Fast Mode (400 kHz) at this minimum voltage. DC characteristics including ICC1 (read current), ISB (standby current), and VIH/VIL thresholds are guaranteed across 1.7–5.5 V. At 1.7 V, standby current is ≤1.0 μA, and the device maintains full functionality including WP pin operation, page writes, and ACK/NACK protocol compliance - making it ideal for energy-harvesting and coin-cell-powered systems.
AT24C16C-XHM-T 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:
- 16Kbit
- Memory Organization:
- 2K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 550 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
AT24C16C-XHM-T FAQ
1.How can I place an order for AT24C16C-XHM-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C16C-XHM-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 AT24C16C-XHM-T reliable?
The price and inventory of AT24C16C-XHM-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C16C-XHM-T is usually 5 days.
3.What payment methods are accepted for AT24C16C-XHM-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C16C-XHM-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C16C-XHM-T?
AT24C16C-XHM-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C16C-XHM-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 AT24C16C-XHM-T?
For technical support, including AT24C16C-XHM-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C16C-XHM-T requirements.
6.How does Aetrix verify that AT24C16C-XHM-T is sourced from the original manufacturer or authorized distributors?
All AT24C16C-XHM-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 AT24C16C-XHM-T meets industry standards.
7.What is the process for return or replacement of AT24C16C-XHM-T?
All AT24C16C-XHM-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C16C-XHM-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 AT24C16C-XHM-T part is unused and in its original packaging.
Return procedure for AT24C16C-XHM-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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