IS43TR16256AL-107MBLI-TR 完全ガイド：4Gb DDR3L SDRAM 256Mx16 の仕様、価格、代替品、設計導入

IS43TR16256AL-107MBLI-TR Quick Answers: What Is It, What Does It Cost, and Is It In Stock?

The IS43TR16256AL-107MBLI-TR is a 4Gb DDR3L SDRAM from ISSI (Integrated Silicon Solution Inc), organized as 256M x 16 with a 16-bit parallel interface. It operates at 1.35V (VDD and VDDQ, ±0.1V tolerance) and delivers a maximum data rate of 1866 Mbps at a 933 MHz clock frequency, with a 20 ns access time. The device is housed in a 96-ball TWBGA (9x13 mm) surface-mount package, is backward compatible with 1.5V DDR3, and is RoHS compliant with an active lifecycle status. As of 2026-09-11, XAIPART stocks 99,999 units with an MOQ of 1. Pricing starts at $8.50 for single units and drops to $5.60 at 1,000 pieces (as of 2026-09-11). View the full IS43TR16256AL-107MBLI-TR product page for real-time stock and the official datasheet.

This article serves as the definitive engineering reference for the part: how to select and design it in, which verified drop-in alternatives exist, its market and supply position, and what buyers should watch next. All specifications cited below come directly from the ISSI datasheet and the XAIPART verified product database.

Technical Guide: How Do You Select and Design In the IS43TR16256AL-107MBLI-TR?

Step 1: Confirm System Requirements Against Verified Specs

Before committing to this part, verify your memory controller and PCB requirements against these verified specifications:

The 1.35V core and I/O supply reduces power consumption by roughly 20% versus standard 1.5V DDR3, while backward compatibility with 1.5V DDR3 gives designers flexibility across mixed-voltage platforms.

Step 2: Understand the Feature Set for Configuration

The device supports burst lengths of 8 and 4, programmable CAS latency and additive latency, on-die termination (ODT), and a DLL-off mode for power saving. Configuration is performed through the mode register set (MRS). For signal integrity at 1866 Mbps, the device supports write leveling and read leveling, which your memory controller should use during training. Auto-refresh and self-refresh modes are available; the typical self-refresh current is [DATA_NEEDED: self-refresh current], so consult the ISSI datasheet for this figure.

Step 3: Follow Power Delivery and Layout Best Practices

The device requires a stable 1.35V supply (VDD) and a separate VDDQ rail for the I/O. Place decoupling capacitors close to the power pins and follow the PCB layout guidelines in the datasheet to maintain signal integrity at 1866 Mbps. The 96-TWBGA (9x13 mm) package keeps the BGA fanout compact, but length-matched fly-by or point-to-point routing for the address/command bus and matched-length DQ/DQS groups remain essential at this speed grade. [VERIFY_NEEDED: specific trace length matching tolerances and topology recommendations — refer to the datasheet layout section.]

Step 4: Key Pin Functions

The full 96-ball pinout is available on the product page, but the functionally critical pins for bring-up are: the differential clock pair CK/CK# (F2/F3), data strobes DQS0/DQS0# (G2/G3) and DQS1/DQS1# (G12/H1), data masks DM0/DM1 (G1/G11), the command pins RAS#/CAS#/WE# (E8–E10), chip select CS# (E11), clock enable CKE (E12), on-die termination control ODT (F1), and the bank address pins BA0–BA2 (E5–E7). The 16-bit data bus DQ0–DQ15 spans rows A and B, and address inputs A0–A15 sit on rows D and E, with A10/AP doubling as the auto-precharge pin.

Step 5: Temperature and Application Fit

The operating temperature range is 0°C to +95°C (case temperature), which suits commercial and industrial environments but is not AEC-Q100 qualified — this part is not rated for automotive use. For automotive programs, use ISSI's automotive-grade DDR3L parts instead.

Step 6: Procurement Planning

Pricing on XAIPART as of 2026-09-11: $8.50 (qty ≥ 1), $7.80 (qty ≥ 10), $6.90 (qty ≥ 100), $6.20 (qty ≥ 500), and $5.60 (qty ≥ 1000). The part ships in tape-and-reel (-TR suffix). Stock is 99,999 units with MOQ 1. DigiKey listed the part as 'ships today' as of 2026-08-18; for larger orders, typical lead times run 8–12 weeks, so plan buffer stock for production ramps.

Alternatives & Comparison: Which Drop-In Replacements Exist for the IS43TR16256AL-107MBLI-TR?

All alternatives below are verified from the XAIPART product database:

The best drop-in replacement is the IS43TR16256BL-107MBLI-TR: both are 4Gb DDR3L SDRAMs with the same 256M x 16 organization, 96-TWBGA package, and 1866 Mbps data rate. The 'BL' version is a newer die revision and can be used without PCB changes. Note that the 'AL' and 'BL' suffixes indicate different die revisions, and the 'BL' version may have improved performance or power characteristics — verify the latest datasheet for specific differences. The IS43TR16256AL-15HBLI is NOT a drop-in replacement at the system timing level because it runs at 1333 Mbps rather than 1866 Mbps; use it only if your controller can be reconfigured. Browse the full IS43TR16256BL-107MBLI-TR listing and the broader Memory ICs category on XAIPART.

Industry Insight: Where Does This Part Stand in the Market and Supply Chain?

The IS43TR16256AL-107MBLI-TR has an active lifecycle status and active part status in the XAIPART database, confirming continued manufacturer support from ISSI. It is classified under EAR99 export control, which simplifies international shipping for most destinations. DDR3L remains a widely deployed memory class for servers, networking equipment, and embedded systems where power efficiency matters — the 1.35V operation cuts power roughly 20% versus 1.5V DDR3. Supply looks healthy: XAIPART holds 99,999 units in stock as of 2026-09-11, and major distributors (DigiKey, Mouser) showed in-stock, ships-today availability as of 2026-08-18. Standard lead time for larger orders runs 8–12 weeks. [DATA_NEEDED: long-term lifecycle/PCN outlook and fabs supply commitment for DDR3L 4Gb from ISSI.]

Trends & Outlook: What Should Buyers Watch?

Three verified-spec-anchored considerations should shape your sourcing strategy. First, die revision migration: ISSI offers the newer 'B' die (IS43TR16256BL-107MBLI-TR) as a pin-compatible replacement with the same 4Gb/256Mx16/1866 Mbps/96-TWBGA profile — buyers should qualify the 'BL' version now to de-risk future allocation shifts. Second, speed-grade flexibility: if cost pressure grows, the 1333 Mbps IS43TR16256AL-15HBLI covers the same footprint at lower performance, useful for cost-optimized embedded designs that do not need full 1866 Mbps bandwidth. Third, power-efficiency demand: with 1.35V operation and DLL-off plus self-refresh modes, this DDR3L class remains attractive for battery-powered and always-on devices, and the 20 ns access time plus 933 MHz clock keep it relevant for real-time embedded processing. When placing volume orders, note the tiered pricing curve ($8.50 → $5.60 at 1K, as of 2026-09-11) — consolidating to the 500- or 1000-piece tier saves 27–34% per unit. Always pull current pricing from the XAIPART product page before quoting designs.