AS4C512M16D4-75BCNTR: Complete Guide to Alliance Memory's 8Gb DDR4-2666 SDRAM

The AS4C512M16D4-75BCNTR is an 8-Gbit DDR4 SDRAM from Alliance Memory organized as 512M x 16, operating at a clock frequency of 1.333 GHz (DDR4-2666, 2666 Mbps per pin) from a 1.2V nominal supply (1.14V–1.26V) in a 96-ball FBGA package measuring 7.5x13 mm. It is rated for commercial temperatures of 0°C to 95°C (case), carries an 18 ns access time and 15 ns write cycle time, and is RoHS compliant and lead-free. As of 2026-09-02, the part is active in lifecycle status, in stock at XAIPART with 99,999 units, MOQ of 1, and tiered pricing from $12.50 (qty 1) down to $8.10 (qty 1,000+). This guide covers selection, design-in, alternatives, and market outlook for this high-density memory component.

What Is the AS4C512M16D4-75BCNTR and Why Does It Matter?

The AS4C512M16D4-75BCNTR is a high-performance 8-Gbit DDR4 SDRAM component from Alliance Memory, a Memory IC in the DDR4 SDRAM category. It transfers data on both edges of the clock signal using an 8n prefetch architecture, is internally configured as sixteen banks, and uses a parallel memory interface. Compared with DDR3, DDR4's lower 1.2V core supply reduces power consumption — the device's supply range of 1.14V to 1.26V delivers that efficiency in data centers, networking, and embedded systems. The die is built on a 20nm-class DRAM process, and the device includes a temperature sensor for thermal management plus pseudo-differential DQS for improved signal integrity. Key features include on-die termination (ODT), programmable read and write latencies, and auto-refresh and self-refresh modes. The -75BCNTR suffix denotes the tape-and-reel packaging variant of the AS4C512M16D4-75BCN: both share identical electrical specifications and the same 96-FBGA package, with TR optimized for automated surface-mount assembly.

How Do You Select and Design In This DDR4 SDRAM?

Start with four verified electrical parameters. First, capacity and organization: 8 Gbit organized as 512M x 16, giving a 16-bit wide data bus per device. Second, speed: a clock frequency of 1.333 GHz corresponding to DDR4-2666 with a data rate of 2666 Mbps per pin, an 18 ns access time, and a 15 ns word/page write cycle time. Third, power: a 1.2V nominal supply with an allowed window of 1.14V to 1.26V. Fourth, environment: a commercial case-temperature range of 0°C to 95°C — suitable for standard enterprise and consumer environments, but not extreme automotive or industrial conditions (for those, see the alternatives section).

For PCB design-in, follow the Alliance Memory datasheet layout guidelines to maintain signal integrity at 2666 Mbps. Place decoupling capacitors close to the power pins and provide a stable 1.2V rail within the 1.14V–1.26V window. Route the high-speed data and address buses carefully, taking advantage of the pseudo-differential DQS signaling for timing margin. The 96-ball FBGA (7.5x13 mm) is surface-mount only and suits high-density DIMM and embedded memory designs. The device supports ODT, programmable read and write latencies, and auto-refresh and self-refresh modes, which your memory controller must configure during initialization. Download the full datasheet PDF from the Alliance Memory website (linked on the XAIPART product page) for AC/DC timing tables and initialization sequences.

What Are the Drop-In Alternatives to AS4C512M16D4-75BCNTR?

According to the verified FAQ data, the best drop-in replacement is the AS4C512M16D4-75BIN — the industrial temperature variant (-40°C to 95°C) with the same package and pinout, so you can switch without PCB changes. A faster speed-grade option, the AS4C512M16D4A-62BCN, is also listed, as is the cross-brand MT40A512M16JY-075E from Micron. Both the AS4C512M16D4-75BCNTR and the MT40A512M16JY-075E are 8Gb DDR4-2666 SDRAMs in 96-FBGA packages, making them drop-in compatible; the Micron part is a well-established option in server applications, while the Alliance Memory part is a functionally equivalent, cost-effective alternative.

Note: [DATA_NEEDED: verified specification tables for AS4C512M16D4-75BIN, AS4C512M16D4A-62BCN, and MT40A512M16JY-075E] — full numeric comparison of these alternatives requires their XAIPART product records, available via the linked product pages.

What Should Designers Know About Power and Signal Integrity?

A practical design calculation: at 1.2V nominal operation the device draws from a narrow 1.14V–1.26V window, so power-tree tolerance budgets must stay within ±5% of nominal. Because the device runs at DDR4-2666, every trace in the data and address bus must meet the datasheet layout guidelines; use the pseudo-differential DQS strobes for data capture and enable ODT per your controller's calibration algorithm. The integrated temperature sensor supports thermal management in dense DIMM stacks, and self-refresh mode allows low-power data retention during system idle. Exact idle/active current figures are not listed in the verified data: [DATA_NEEDED: IDD current specifications].

Where Is This Component Used? (Top Application Scenarios)

The verified application data maps the AS4C512M16D4-75BCNTR to six scenarios: server memory (8Gb capacity, DDR4-2666 speed for virtualization, database management, and cloud computing; 1.2V operation cuts data-center power), networking equipment (fast packet buffering and routing table storage with a 2666 Mbps data rate), industrial computing (machine vision and real-time data processing; the FBGA package withstands vibration), consumer electronics (gaming consoles, smart TVs, set-top boxes needing multimedia bandwidth), automotive infotainment (cabin environments; use the industrial-temperature -75BIN variant for under-hood applications), and data-center accelerators (AI and FPGA compute as a cost-effective alternative to HBM for many workloads).

What Is the Market Position and Supply Situation for AS4C512M16D4-75BCNTR?

The lifecycle status of the AS4C512M16D4-75BCNTR is active, per the verified database. On the supply side, XAIPART lists 99,999 units in stock with MOQ of 1 as of 2026-09-02, and per the verified FAQ the part has shown in stock at major distributors including DigiKey and Mouser. Typical factory lead time is 4–6 weeks from Alliance Memory, though in-stock distributors enable immediate shipment. Volume pricing as of 2026-09-02: $12.50 at qty 1, $11.20 at qty 10, $9.80 at qty 100, $8.90 at qty 500, and $8.10 at qty 1,000+. [DATA_NEEDED: long-term lifecycle forecast and manufacturer end-of-life policy].

What Trends Should Buyers Watch for DDR4 Memory Components?

Anchor your sourcing decisions to the verified specs: DDR4's 1.2V supply and 8n prefetch architecture remain the standard for servers, networking, and data-center accelerators where this part competes as a cost-effective alternative to HBM. Buyers should watch three things. First, price-break economics — the gap from $12.50 (qty 1) to $8.10 (qty 1,000+) means consolidating orders at 500 or 1,000 units saves 29–35% per unit. Second, temperature-grade fit — if designs drift toward harsher environments, the pin-compatible AS4C512M16D4-75BIN (-40°C to 95°C) removes the commercial-range limit without a PCB respin. Third, second-source coverage — the drop-in compatible Micron MT40A512M16JY-075E provides supply-chain flexibility for high-volume server builds, though the Alliance part is functionally equivalent. Verify current stock and pricing on the XAIPART product page before ordering, since availability changes.