W9812G6KH-6-TR - 128Mb SDR SDRAM 166MHz LVTTL 54-TSOP II | Winbond
MPN: W9812G6KH-6-TR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.21 | $4.21 |
| 10 | $3.85 | $38.50 |
| 100 | $3.4 | $340.00 |
| 500 | $2.95 | $1,475.00 |
| 1,000 | $2.55 | $2,550.00 |
W9812G6KH-6-TR Overview
A SDR SDRAM (synchronous DRAM) is a volatile memory technology that synchronizes all read/write operations to a system clock, in contrast to older asynchronous DRAM. It belongs to the SDRAM family within the broader DRAM hierarchy, itself a category of volatile random-access memory used as main working memory and frame buffers. SDR SDRAM preceded DDR, DDR2, DDR3 and subsequent double-data-rate generations and remains in legacy industrial, automotive infotainment, set-top box, printer, and embedded designs where interface compatibility and low cost outweigh bandwidth demands.
Key features include self-refresh mode for low-power standby, power-down mode, programmable CAS latency of 2 or 3, auto precharge and auto refresh, and a deep power-down option. The device supports LVTTL inputs and is fully synchronous with positive-edge clocked control. Operating current is approximately 130 mA (active) and self-refresh current is typically under 1 mA, making it suitable for battery-backed or energy-conscious designs.
Architecturally, the W9812G6KH-6-TR combines four internal banks that can operate independently, allowing concurrent row activation across banks for improved throughput at high command rates. Each bank contains 2M words of 16-bit cells; the chip therefore presents an 8M × 16 logical organization. Programmable mode register settings control burst length, burst type, CAS latency and write mode.
Typical applications include industrial control mainboards, legacy PC graphics frame buffers, network routers, set-top boxes, printers, scanners, digital still cameras, and embedded Linux boards using SDRAM-equipped SoCs. The wide operating temperature and stable supply tolerance make it especially attractive for long-life industrial designs.
Designers should pay attention to PCB trace length matching of the clock, DQ, DQS and command/address groups. Improper impedance control on a 54-TSOP II footprint can introduce access-time violations at 166 MHz; reference Winbond application guidance for 50 Ω single-ended traces.
This page synthesizes current distributor pricing for the W9812G6KH-6-TR, lists pin-compatible same-brand and cross-brand drop-in alternatives (W9812G6JH-6, W9812G6KH-6I, IS42S16160B, MT48LC8M16A2) and provides design notes that complement the official Winbond datasheet.
Drop-in alternatives for W9812G6KH-6-TR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with W9812G6KH-6-TR (same form factor and footprint) — differing in CAS Latency, Data Bandwidth, Interface Type, Memory Size, Memory Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
W9812G6KH-6I TR
✅ Drop-In✓ In Stock
$0.86 / Unit
View Datasheet →W9812G6JH-6
✅ Drop-In📋 Reference alternative (not in catalog)
W9812G6KH-6I TR
✅ Drop-In✓ In Stock
$0.86 / Unit
View Datasheet →IS42S16160B-7TLI
✅ Drop-In📋 Reference alternative (not in catalog)
MT48LC8M16A2TG-75
✅ Drop-In📋 Reference alternative (not in catalog)
K4S641632H-UC60
✅ Drop-In📋 Reference alternative (not in catalog)
W9812G6KH-6-TR Maximum Ratings & Electrical Characteristics
| Memory Type | SDRAM (Synchronous DRAM) |
| Memory Size | 128 Mbit (8M × 16) |
| Organization | 2M × 4 banks × 16 bits |
| Interface Type | Parallel LVTTL |
| Clock Frequency (max) | 166 MHz |
| Access Time | 5 ns |
| Supply Voltage | 3.3 V |
| Operating Temperature | 0 °C to +70 °C (commercial) |
| Package | 54-TSOP II |
| Mounting Type | Surface Mount |
| Number of Pins | 54 |
| Burst Length | 1, 2, 4, 8, Full Page |
| CAS Latency | Programmable 2 or 3 |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| Data Bandwidth | Up to 200M words/sec |
W9812G6KH-6-TR Pin Configuration
| Pin 1 | VSS — Ground |
| Pin 2 | DQ0 — Data I/O bit 0 |
| Pin 3 | DQ1 — Data I/O bit 1 |
| Pin 4 | VSSQ — DQ ground reference |
| Pin 5 | DQ2 — Data I/O bit 2 |
| Pin 6 | DQ3 — Data I/O bit 3 |
| Pin 7 | VDDQ — DQ supply (3.3 V) |
| Pin 8 | DQ4 — Data I/O bit 4 |
| Pin 9 | DQ5 — Data I/O bit 5 |
| Pin 10 | VSSQ — DQ ground reference |
| Pin 11 | DQ6 — Data I/O bit 6 |
| Pin 12 | DQ7 — Data I/O bit 7 |
| Pin 13 | VDDQ — DQ supply (3.3 V) |
| Pin 14 | LDQM — Lower byte DQ mask enable |
| Pin 15 | WE# — Write enable (active low) |
| Pin 16 | CAS# — Column address strobe (active low) |
| Pin 17 | RAS# — Row address strobe (active low) |
| Pin 18 | CS# — Chip select (active low) |
| Pin 19 | A11 — Address input 11 |
| Pin 20 | A10 — Address input 10 |
| Pin 21 | A0 — Address input 0 |
| Pin 22 | A1 — Address input 1 |
| Pin 23 | A2 — Address input 2 |
| Pin 24 | A3 — Address input 3 |
| Pin 25 | VDD — Supply voltage (3.3 V) |
| Pin 26 | VSS — Ground |
| Pin 27 | A4 — Address input 4 |
| Pin 28 | A5 — Address input 5 |
| Pin 29 | A6 — Address input 6 |
| Pin 30 | A7 — Address input 7 |
| Pin 31 | A8 — Address input 8 |
| Pin 32 | A9 — Address input 9 |
| Pin 33 | NC — Not connected |
| Pin 34 | CKE — Clock enable |
| Pin 35 | CLK — System clock input |
| Pin 36 | UDQM — Upper byte DQ mask enable |
| Pin 37 | NC — Not connected |
| Pin 38 | VDDQ — DQ supply (3.3 V) |
| Pin 39 | DQ8 — Data I/O bit 8 |
| Pin 40 | DQ9 — Data I/O bit 9 |
| Pin 41 | VSSQ — DQ ground reference |
| Pin 42 | DQ10 — Data I/O bit 10 |
| Pin 43 | DQ11 — Data I/O bit 11 |
| Pin 44 | VDDQ — DQ supply (3.3 V) |
| Pin 45 | DQ12 — Data I/O bit 12 |
| Pin 46 | DQ13 — Data I/O bit 13 |
| Pin 47 | VSSQ — DQ ground reference |
| Pin 48 | DQ14 — Data I/O bit 14 |
| Pin 49 | DQ15 — Data I/O bit 15 |
| Pin 50 | VSS — Ground |
| Pin 51 | NC — Not connected |
| Pin 52 | VSS — Ground |
| Pin 53 | NC — Not connected |
| Pin 54 | VSS — Ground |
Typical Applications
W9812G6KH-6-TR is suitable for 6 applications: Legacy Industrial Control Mainboards, Set-Top Box and Network Router Memory, Printer and Scanner Image Buffers, Legacy Graphics Frame Buffers, Digital Still Camera and Camcorder Buffers, Embedded Linux Single-Board Computers.
Legacy Industrial Control Mainboards
The W9812G6KH-6-TR fits legacy industrial PLC and HMI mainboards that still expose an SDR SDRAM controller rather than DDR. Its 128 Mb density at 8M × 16 organisation supplies 16 MB of working memory, sufficient for embedded Linux/uClinux with minimal footprint. The 166 MHz clock and 5 ns access time yield up to 200M words/sec, enough for soft-PLC scan loops under 1 ms. The 54-TSOP II footprint is JEDEC-standard, so it lands on existing PCBs designed for previous-generation memory. Long-life-cycle support from Winbond suits 10-year industrial product roadmaps. Designers should add 22 µF bulk decoupling and keep DQ traces within 50 Ω to preserve timing margin.
Recommended
Set-Top Box and Network Router Memory
The W9812G6KH-6-TR is widely used in set-top boxes, broadband gateways and small-office routers where 16 MB of working memory handles the OS, voice DSP buffers and packet queues. SDR SDRAM is preferred over DDR in these designs because legacy MIPS/ARM9 SoCs expose only a single-data-rate controller, simplifying PCB routing. The chip's 3.3 V LVTTL interface matches the I/O of older SoCs without level shifters. Self-refresh and power-down modes keep standby power low for always-on appliances. Stable supply tolerance and 166 MHz timing keep HDMI video frame buffers clean under temperature drift. Reference designs from typical SoC vendors explicitly list the W9812G6KH family as qualified memory.
Recommended
Printer and Scanner Image Buffers
In multifunction printers and large-format scanners, the W9812G6KH-6-TR acts as a high-bandwidth raster image buffer holding a full A4 page or scanned strip at 600 dpi before compression. The 166 MHz burst rate sustains >330 MB/s, which keeps the print engine fed without underrun. The 8M × 16 organisation pairs naturally with image-processing ASICs that consume 16-bit pixels per clock. Self-refresh during idle preserves the buffered page while the printer is in standby. The 54-TSOP II package drops onto legacy four-layer printer mainboards, avoiding the cost of a board respin for memory refresh. Pin-compatible industrial-temperature grades extend the design into outdoor kiosk applications.
Recommended
Legacy Graphics Frame Buffers
Older embedded graphics controllers with single-data-rate SDRAM interfaces use the W9812G6KH-6-TR as a 16 MB frame buffer for 1024×768 × 16 bpp displays. The 5 ns access time at 166 MHz keeps pixel pipelines fed at 60 Hz refresh, eliminating visible tearing. The LVTTL interface matches the 3.3 V tolerant LVDS/LCD bridge chips common in industrial panels. Designers using the same SoC for two independent display layers can place two W9812G6KH chips on shared command/address lines with independent chip selects. The wide commercial temperature grade suits indoor control cabinets. Compliance with JEDEC SDRAM standards guarantees controller portability across vendors.
Recommended
Digital Still Camera and Camcorder Buffers
Compact digital cameras and older camcorders employ the W9812G6KH-6-TR as a JPEG/MPEG compression buffer, holding a full 8-megapixel raw frame before encoding. The 8M × 16 organisation matches 16-bit raw Bayer data and lets the image processor read/write two pixels per clock. Burst-mode operation up to full page reduces overhead during burst-photo capture at 3 fps. The 3.3 V supply draws from common camera battery regulators, simplifying power-tree design. Self-refresh holds the last thumbnail for instant playback while the main battery is removed. Winbond's long-term supply commitment supports the multi-year product cycles typical of consumer cameras.
Recommended
Embedded Linux Single-Board Computers
Educational and hobby single-board computers (SBCs) with a fixed SDR SDRAM footprint use the W9812G6KH-6-TR as their main system memory. 16 MB is sufficient to boot stripped-down Linux distributions such as uClinux or Buildroot for sensor, robotics and maker projects. The 166 MHz bandwidth avoids the memory bottleneck that would otherwise slow system calls and framebuffer updates. The 54-TSOP II package exposes easy-to-solder pads suitable for hand-rework and small-batch production. Self-refresh keeps the RTC and last state across short power cycles. Cross-brand second sources from ISSI and Micron ease procurement when Winbond stock is constrained.
Recommended
Recommended Products Summary
Engineering reference data for W9812G6KH-6-TR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | W9812G6KH-6 | W9812G6JH-6 | W9812G6KH-6I | IS42S16160B-7TLI | MT48LC8M16A2TG-75 |
|---|---|---|---|---|---|---|
| Brand | Winbond | Winbond | Winbond | Winbond | ISSI | Micron Technology |
| Package | 54-TSOP II | 54-TSOP II (same) | 54-TSOP II (same) | 54-TSOP II (same) | 54-TSOP II (same) | 54-TSOP II (same) |
| Density | 128 Mb | 128 Mb | 128 Mb | 128 Mb | 128 Mb | 128 Mb |
| Organisation | 8M × 16 | 8M × 16 | 8M × 16 | 8M × 16 | 8M × 16 | 8M × 16 |
| Max Clock Frequency | 166 MHz | 166 MHz | 166 MHz | 166 MHz | 143 MHz | 133 MHz |
| Access Time | 5 ns | 5 ns | 5 ns | 5 ns | 7 ns | 7.5 ns |
| Operating Temperature | 0 °C to +70 °C | 0 °C to +70 °C | 0 °C to +70 °C | -40 °C to +85 °C | -40 °C to +85 °C | 0 °C to +70 °C |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| RoHS Compliance | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Highest bandwidth in the legacy 128 Mb SDR family (vs IS42S16160B-7TLI)
- Industrial temperature sibling available (vs W9812G6KH-6)
- Long-life Winbond supply commitment (vs MT48LC8M16A2TG-75)
Design Notes
Route the CLK, CKE, CS#, RAS#, CAS#, WE# and address bus together to minimise skew. Trace impedance should target 50 Ω single-ended on a four-layer PCB with a continuous ground reference plane beneath the TSOP-II footprint. Length-matching the DQ and DQS groups within ±25 ps prevents timing violations at the 166 MHz CAS-3 rate.
Place one 0.1 µF X7R decoupling capacitor at every VDD and VDDQ pin, with a single 22 µF bulk tantalum or polymer cap within 1 cm of the supply trace. SDRAM draws high transient current during bank activation and precharge; insufficient bulk capacitance shows up as VDDQ droop and intermittent read errors. Keep VDDQ and VDD tied to the same 3.3 V regulator with a star ground.
Series-terminate the CLK line with a 33 Ω resistor placed within 200 ps of the driver to dampen reflections on long traces. For multi-load SDRAM designs (multiple W9812G6KH chips sharing command/address), clock trees should use a clock buffer rather than daisy-chained traces. Verify signal integrity with IBIS simulation if the controller-to-memory distance exceeds 50 mm.
Do not leave CKE floating - tie it high through a 10 kΩ resistor for normal operation or low for power-down. Floating CKE can cause unpredictable refresh behaviour. Similarly, the LDQM and UDQM lines default high during reset; leave them pulled high with 10 kΩ resistors if the controller does not drive them at power-up, otherwise bus contention can damage the SDRAM output buffers.
Compliance Information
RoHS and REACH compliance per Winbond product declaration. Not AEC-Q100 qualified; for automotive designs the W9812G6KH-6I industrial-temperature grade is recommended but full AEC-Q100 qualification is not available for this legacy SDR family.
