K4D261638F-LC50 – GDDR SDRAM – Samsung

The Samsung K4D261638F-LC50 is a 128Mbit Graphics DDR (GDDR) SDRAM organized as 8M x 16 (4 banks x 2M x 16), rated at the -50 speed grade (200MHz clock, 5ns cycle time, 400 Mbps/pin) in a lead-free 66-pin TSOP-II package. This obsolete, hard-to-find part is available for RFQ.

The Samsung K4D261638F-LC50 is a 128-megabit Graphics Double Data Rate (GDDR) Synchronous DRAM designed for high-bandwidth graphics and embedded display applications. It is organized as 8M x 16 (4 banks x 2,097,152 words x 16 bits), for a total of 134,217,728 bits, with an SSTL_2-compatible interface. The “-LC50” designation denotes a lead-free (Pb-free) 66-pin TSOP-II package at the -50 speed grade, which corresponds to a 200MHz clock (5ns cycle time) and 400 Mbps/pin double-data-rate operation. The device supports programmable read (CAS) latencies of 3, 4 and 5 clocks and burst lengths of 2, 4 and 8.

This device belongs to Samsung’s legacy K4D261638F GDDR SDRAM family (datasheet circa 2004) and is now an obsolete, end-of-life component with little to no authorized-distributor availability. Pacific Component Xchange maintains inventory of this scarce part to support repair, replacement, and end-of-life production needs.

Key Features

• Memory type: Graphics DDR (GDDR) SDRAM
• Density: 128 Mbit (134,217,728 bits)
• Organization: 8M x 16 (4 banks x 2M x 16)
• Speed grade: -50 (200MHz / 5ns cycle time, DDR / 400 Mbps per pin)
• CAS latency: Programmable read latency of 3, 4 or 5 clocks
• Burst length: 2, 4 or 8
• Supply voltage: 2.5V +/-5% (VDD / VDDQ)
• I/O interface: SSTL_2 compatible
• Package: Lead-free (Pb-free) 66-pin TSOP-II
• Data path: x16 I/O width, 4 internal banks

Applications

• Graphics cards and display controllers
• Embedded and industrial graphics subsystems
• Set-top boxes and digital TV / multimedia systems
• Networking and telecom line cards requiring fast buffer memory
• Legacy system repair, maintenance, and end-of-life production builds

Why Source K4D261638F-LC50 from Pacific Component Xchange

The K4D261638F-LC50 is an obsolete Samsung GDDR SDRAM that is difficult to obtain through authorized channels. As an independent distributor specializing in hard-to-find and end-of-life memory, Pacific Component Xchange helps engineers and procurement teams keep aging designs in production without costly redesigns. Every order is backed by inspection and authenticity verification to guard against counterfeit and substandard parts, with global shipping to meet your schedule. Submit a Request for Quote (RFQ) with your target quantity and date code requirements, and our team will respond with current availability and pricing.