MT41K256M16TW-107IT: Complete Engineer's Guide to Micron's 4Gb DDR3L SDRAM (Specs, Pinout, Design-In, Alternatives)

The Micron MT41K256M16TW-107IT is a 4Gb DDR3L SDRAM organized as 256M x 16, operating at 1.35V with a 933 MHz data rate (DDR3L-1866), a 20 ns access time, and a 16-bit parallel data bus in a 96-ball FBGA (8x14 mm) package rated for the industrial temperature range of -40°C to +95°C. The part is in active lifecycle status and is currently in stock at XAIPART with 99,999 units available, MOQ of 1, and pricing as of 2026-09-12 starting at $12.50 for single units and dropping to $7.90 at 1,000 units. It supports auto self-refresh, auto precharge, asynchronous reset, dynamic on-chip termination (ODT), ZQ calibration, and write leveling, and it is RoHS compliant. This guide covers everything a design engineer needs to specify, design in, and source this component.

What Is the MT41K256M16TW-107IT and Who Makes It?

The MT41K256M16TW-107IT is a 4-gigabit DDR3L SDRAM manufactured by Micron Technology, categorized under Memory ICs. The organization is 256M x 16, meaning 256 million addressable 16-bit words. It runs from a 1.35V supply — the DDR3L low-voltage standard — which reduces power consumption by approximately 20% compared with standard 1.5V DDR3. The '-107' speed grade corresponds to a 933 MHz clock rate, i.e., DDR3L-1866 data rate. The 'IT' suffix in the part number denotes the industrial temperature rating of -40°C to +95°C, distinguishing it from commercial-grade parts that typically operate from 0°C to +95°C. The device is fabricated on Micron's CMOS process and follows JEDEC-standard DDR3L timing for controller compatibility [VERIFY_NEEDED: exact JEDEC specification document reference not provided in verified data].

Key verified specifications are summarized in the table below.

How Do You Design In the MT41K256M16TW-107IT? A Technical Guide

Designing in this DDR3L SDRAM requires attention to power, signal integrity, feature configuration, and thermal management. The following practices are anchored to the device's verified feature set.

Power Delivery and Decoupling

The device operates from a 1.35V supply (VDD) with a separate I/O supply rail (VDDQ), as shown in the verified pinout where Pin A1 is VDD (power supply, 1.35V), Pin B3 is VDDQ (I/O power supply), and Pins A4 and C4 are VSS (ground). Provide dedicated 1.35V planes for VDD and VDDQ with proper decoupling; at a 933 MHz data rate, the datasheet layout guidelines must be followed to maintain signal integrity [VERIFY_NEEDED: specific decoupling capacitor values not provided in verified data — consult the Micron datasheet].

Signal Integrity at 933 MHz

At DDR3L-1866 speeds, trace-length matching, impedance control, and termination are critical. Use the device's dynamic on-chip termination (ODT) to reduce external termination component count and improve signal integrity on the DQ/DM/DQS nets. Enable write leveling during controller initialization to compensate for fly-by-routing skew on the clock/command/address bus. Perform ZQ calibration to calibrate output driver strength and ODT impedance against the external ZQ reference resistor [VERIFY_NEEDED: exact ZQ resistor value not provided in verified data — see datasheet]. The asynchronous reset input allows the controller to place the device in a known state during power sequencing events.

Controller Initialization and Feature Use

A typical DDR3L memory controller bring-up sequence enables: (1) asynchronous reset assertion, (2) ZQ calibration, (3) write leveling, (4) ODT configuration, and (5) auto precharge and auto self-refresh policy selection. Auto self-refresh lets the device maintain data with minimal controller intervention during idle periods, contributing to the ~20% power savings versus 1.5V DDR3. Auto precharge reduces command overhead for burst reads and writes that terminate at row boundaries.

Thermal Management for the Industrial Grade

The industrial temperature range requires adequate thermal management to keep the junction temperature within specified limits. The 96-ball FBGA (8x14 mm) package offers good thermal performance for its footprint, but designers working at the upper +95°C ambient extreme — such as sealed industrial enclosures or telecom cabinets — should verify PCB copper spreading and airflow against Micron's thermal application guidance [DATA_NEEDED: thermal resistance (θJA) specification].

PCB Layout Guidance

The 16-bit data bus is accompanied by data strobes DQS0/DQS#0 (Pins D1/D2) and data mask DM0 (Pin D4). Length-match each DQ within its byte lane to its DQS pair, and route the strobes differentially. Reference DQ/DQS/DM routing to clean VSS returns (Pins A4, C4) and keep VDDQ (Pin B3) local and well-decoupled. Follow the datasheet layout guidelines to maintain signal integrity at 933 MHz.

Where Is the MT41K256M16TW-107IT Used? Verified Application Scenarios

The verified application set for this part spans networking, embedded computing, industrial automation, test and measurement, medical devices, and automotive infotainment. Three representative scenarios:

• Networking equipment: The 4Gb capacity and 933 MHz data rate support high-throughput packet processing in routers and switches, while 1.35V operation reduces power in always-on infrastructure. The industrial temperature range suits uncontrolled environments like telecom cabinets.
• Embedded computing: 4Gb is sufficient for running operating systems and complex applications; the 96-FBGA package fits compact PCBs in industrial PCs and single-board computers, with the -40°C to +95°C range supporting rugged designs.
• Industrial automation: Controllers on factory floors and in outdoor installations benefit from the full industrial temperature range, with the 933 MHz data rate enabling fast data logging and real-time control in sealed enclosures.

Additional verified applications include test and measurement instruments (large 4Gb acquisition buffers, fast 933 MHz transfer to processors), medical imaging and monitoring devices, and automotive infotainment systems covering -40°C to +95°C cabin and under-hood requirements.

What Are the Best Alternatives to the MT41K256M16TW-107IT?

Verified alternatives include Micron's own automotive-temperature-grade variant and three cross-brand equivalents with matching footprint and electrical specifications.

The Samsung K4B4G1646D-BYMA is identified as the best drop-in replacement: a 4Gb DDR3L SDRAM in the same 96-FBGA package with identical pinout and electrical specifications, suitable for direct substitution during Micron part shortages. Within the Micron family, choose the MT41K256M16TW-107IT over the commercial-grade MT41K256M16TW-107:P when your application requires operation below 0°C — the 'IT' version is rated -40°C to +95°C, while the non-IT commercial version is rated 0°C to +95°C; the ':P' suffix on the latter denotes tray packaging. For under-hood and extreme-temperature automotive designs, step up to the AIT:P automotive grade. Detailed specifications for the cross-brand equivalents are available on their respective product pages [DATA_NEEDED: full spec tables for K4B4G1646D-BYMA, H5TC4G63AFR, NT5CB256M16DP].

What Is the Market Position, Lifecycle Status, and Supply Situation?

The MT41K256M16TW-107IT is in active lifecycle status per the verified database. Supply at XAIPART is strong: 99,999 units in stock with a minimum order quantity of 1, as of 2026-09-12. Pricing is tiered as follows: $12.50 for 1 unit, $11.20 for 10 units, $9.80 for 100 units, $8.50 for 500 units, and $7.90 for 1,000 units, as of 2026-09-12. Distributor listings have shown the part as 'ships today' for in-stock items, while larger direct orders from Micron may require 8–12 weeks lead time as of 2026-08-18. [DATA_NEEDED: projected end-of-life date and long-term DDR3 supply outlook — not provided in verified data.]

What Should Buyers Watch? Trends and Outlook

Buyers of this part should monitor the following, anchored to verified data:

• Price leverage through volume: The 37% unit-price reduction from single-unit ($12.50) to 1,000-unit ($7.90) quantities rewards consolidated ordering. Current XAIPART depth of 99,999 units supports substantial buys without allocation risk.
• Industrial vs. commercial grade sourcing: Demand for the IT grade (-40°C to +95°C) outpaces commercial parts in rugged applications. Dual-source qualification against the pin-compatible K4B4G1646D-BYMA protects programs against single-vendor supply shocks.
• Automotive upward migration: Designs near the +95°C ceiling or with automotive qualification requirements should evaluate the MT41K256M16TW-107 AIT:P grade with extended reliability.
• Power-driven design decisions: The 1.35V DDR3L supply's roughly 20% power savings over 1.5V DDR3 remains a key justification for DDR3L in battery-powered medical and portable designs; verify this trade-off remains valid against newer low-power memory families for each new design [VERIFY_NEEDED: comparison with newer memory families not provided in verified data].

How Do You Source the MT41K256M16TW-107IT on XAIPART?

Order directly from the MT41K256M16TW-107IT product page on XAIPART, with MOQ of 1 and tiered pricing as of 2026-09-12. The official Micron datasheet is available for download. For footprint-identical second sources, review the Samsung K4B4G1646D-BYMA product page and browse the full Memory ICs catalog. Always confirm current stock and pricing before placing purchase orders, as availability can change.