Winbond Electronics Corporation W9864G6KH-6

Overview

W9864G6KH-6 from Winbond is a 1M × 4 banks × 16-bit synchronous DRAM (SDRAM) operating at 166 MHz with CAS Latency 3, 3.3V ±0.3V supply, and TSOP II-54 package. It delivers 332 MB/s peak bandwidth and supports burst lengths of 1/2/4/8/full-page in sequential or interleave mode for embedded main memory applications.

For engineers reviewing the W9864G6KH-6 datasheet, W9864G6KH-6 pinout, W9864G6KH-6 application, or W9864G6KH-6 equivalent, key selection factors include its industrial-grade timing compliance (tRCD = 20 ns, tRP = 20 ns), LVTTL interface compatibility, self-refresh current ≤2 mA, and support for auto-precharge and bank interleaving to hide latency in real-time systems.

Technical Context

This SDRAM implements four independent 1M-word banks with shared address/command bus and multiplexed row/column addressing. Row activation (RAS) and column access (CAS) are synchronized to CLK rising edges, with CKE enabling/disabling clock domain operation including Power Down and Self Refresh modes.

It uses a programmable Mode Register to configure burst length, CAS latency, and burst type (sequential/interleave), and supports full-page, single-write, and burst-stop operations. Internal refresh counter executes 4K cycles per 64 ms, and DQ masking via LDQM/UDQM enables byte-level write control without external logic.

Key Specifications

Pinout & Package

W9864G6KH-6 is housed in a RoHS-compliant, lead-free TSOP II-54 package (400 mil width), with 54 pins arranged in two rows. Pin functions are strictly defined per JEDEC SDRAM standards and validated in Winbond's official datasheet revision A03.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar SDRAM applications.

Compared with IS42S16100E-6BLI and MT48LC16M16A2P-6A, W9864G6KH-6 offers optimal balance of commercial-temperature reliability, strict JEDEC timing compliance, and drop-in replaceability in existing TSOP II-54 designs - making it ideal for cost-sensitive, volume production of mid-tier embedded systems.

Availability

W9864G6KH-6 is available at Aetrix Electronics and suitable for industrial HMI display controllers, network router packet buffers, medical ultrasound image processors, and automotive infotainment head units requiring stable component supply and long-term manufacturing continuity.

Supply support for W9864G6KH-6 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

Winbond Electronics is a Taiwan-based semiconductor company specializing in specialty memory solutions, including NOR/NAND Flash, SRAM, and SDRAM products for industrial, communications, and consumer markets.

W9864G6KH-6 belongs to Winbond's legacy SDR SDRAM product line, designed specifically for cost-optimized, high-reliability embedded systems requiring JEDEC-compliant synchronous DRAM with proven manufacturability and long-lifecycle support.

FAQ

What is the maximum operating frequency and CAS latency of the W9864G6KH-6?

The W9864G6KH-6 is rated for a maximum clock frequency of 166 MHz with a fixed CAS latency of 3 (CL3). This means the device requires exactly three clock cycles between issuing a read command and the appearance of the first valid data word on DQ pins, as confirmed in the "Order Information" table and AC characteristics section of the datasheet revision A03.

Does the W9864G6KH-6 support auto-precharge, and how is it enabled?

Yes, the W9864G6KH-6 supports auto-precharge. It is enabled by driving A10 high during a READ or WRITE command cycle. When activated, the SDRAM automatically initiates precharge of the accessed bank before the burst completes - eliminating the need for a separate PRECHARGE command and reducing command overhead in streaming applications.

What package type and pin count does the W9864G6KH-6 use?

The W9864G6KH-6 uses a RoHS-compliant, lead-free TSOP II-54 package with 54 pins in a 400-mil body width. Pin configuration and numbering are fully documented in Section 4 ("Pin Configuration") and Section 5 ("Pin Description") of the official datasheet, confirming compatibility with standard SDRAM socket footprints.

What is the memory organization and total capacity of the W9864G6KH-6?

The W9864G6KH-6 is organized as 1M words × 4 banks × 16 bits, resulting in a total capacity of 128 Mbit (16 MB). This structure is explicitly stated in the General Description section and verified across the Block Diagram, Functional Description, and Ordering Information tables in the datasheet.

How does the W9864G6KH-6 handle power management modes like Self Refresh and Power Down?

The W9864G6KH-6 supports both Self Refresh (entered via CS/RAS/CAS/WE=L, CKE=L) and Power Down (CKE=L while idle). In Self Refresh, it consumes ≤2 mA and maintains data without external clocks; in Power Down, all input receivers except CKE are gated off but refresh must be externally maintained within 64 ms intervals.