Winbond Electronics Corporation W9816G6IH-6

Overview

W9816G6IH-6 from Winbond Electronics is a 512K × 2 banks × 16-bit synchronous DRAM (SDRAM) operating at 166 MHz with CAS Latency 3, 3.3V ±0.3V supply, and TSOP II-50 package. It delivers up to 266 MB/s bandwidth and supports burst lengths of 1, 2, 4, 8, and full page for high-throughput memory buffering in embedded controllers and industrial display systems.

For engineers reviewing the W9816G6IH-6 datasheet, W9816G6IH-6 pinout, W9816G6IH-6 application, or W9816G6IH-6 equivalent, key selection criteria include its 166 MHz/CL3 timing compliance, dual-bank interleaving capability, LVTTL interface compatibility, self-refresh current ≤2 mA, and industrial-grade alternatives with extended temperature support.

Technical Context

This SDRAM implements fully synchronous operation latched on the rising edge of CLK, with programmable Mode Register control over burst type (sequential/interleave), burst length, and CAS latency. Its dual-bank architecture enables bank interleaving to hide precharge delays, supporting continuous data streaming across pages without bus idle cycles.

Command decoding relies on RAS/CAS/WE/CS combinations synchronized to CLK, with CKE enabling power management modes including Power Down and Self Refresh. The device uses separate VCCQ/VSSQ rails for I/O buffers to improve noise immunity, and supports auto-precharge, burst stop, and DQM-controlled byte masking for precise data integrity in mixed-read/write environments.

Key Specifications

Pinout & Package

W9816G6IH-6 is housed in a 50-pin, 400-mil TSOP II (Thin Small Outline Package, Type II) with lead-free, RoHS-compliant construction. Pin pitch is 0.5 mm, body width 10.16 mm, and height ≤1.2 mm - suitable for space-constrained PCB layouts in industrial and consumer electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with W9816G6IH-6, IS42S16100E-6BLI offers wider voltage tolerance and extended temperature support at the cost of higher self-refresh current, while MT48LC16M16A2P-6A provides automotive-grade qualification and longer production continuity but with relaxed tRC timing - both require board-level validation due to pin count and package differences.

Availability

W9816G6IH-6 is available at Aetrix Electronics and suitable for industrial HMI display buffers, network router packet buffers, and embedded media player memory requiring stable component supply, long-term lifecycle assurance, and commercial-temperature SDRAM performance.

Supply support for W9816G6IH-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 manufacturer specializing in specialty memory solutions, including SPI NOR Flash, DDR/SDRAM, and voice/audio ICs, serving industrial, communications, and consumer markets since 1987.

The W98 series SDRAM product line targets cost-sensitive, high-reliability embedded systems requiring JEDEC-compliant synchronous DRAM with industrial temperature variants and long-lifecycle support.

FAQ

What is the maximum operating frequency and CAS latency supported by W9816G6IH-6?

W9816G6IH-6 is rated for 166 MHz operation with CAS Latency 3 (CL3), and also supports CL2 timing at reduced frequencies. Its tCK specification is 6 ns, and it complies with JEDEC Standard No. 21-C for SDRAM timing. This makes W9816G6IH-6 suitable for systems requiring deterministic 16-bit memory bandwidth up to 266 MB/s without overclocking.

Does W9816G6IH-6 support auto-precharge and how is it enabled?

Yes, W9816G6IH-6 supports auto-precharge: when A10 is driven high during a READ or WRITE command, the SDRAM automatically initiates precharge after burst completion. For reads, precharge begins before burst end based on CL; for writes, it starts two clocks after final data-in (tWR). This eliminates manual precharge commands and reduces controller overhead in W9816G6IH-6 implementations.

What package type and pin count does W9816G6IH-6 use?

W9816G6IH-6 uses a 50-pin, 400-mil TSOP II (Thin Small Outline Package, Type II) with 0.5 mm pitch and RoHS-compliant lead-free finish. Its mechanical dimensions conform to JEDEC MO-152AA, and it features separate VCCQ/VSSQ pins for I/O power isolation - a key layout requirement reflected in W9816G6IH-6 reference designs.

Can W9816G6IH-6 operate in self-refresh mode, and what is its typical current draw?

Yes, W9816G6IH-6 supports self-refresh mode entered via the Self Refresh Command (CS=RAS=CAS=WE=low, CKE=low), drawing ≤2 mA typical current. This allows W9816G6IH-6 to retain memory contents during system sleep or power-loss events without external refresh circuitry, making it ideal for battery-backed or energy-conscious embedded applications.

How does W9816G6IH-6 handle byte-level write masking?

W9816G6IH-6 implements byte-level write masking using LDQM (pins 14, 36) for DQ0–DQ7 and UDQM for DQ8–DQ15. When asserted high during a write cycle, each mask signal blocks corresponding byte writes with zero latency - enabling precise peripheral register updates or partial buffer writes without read-modify-write sequences in W9816G6IH-6 systems.