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Winbond Electronics Corporation W9425G6KH-5I TR
- Part No.:
- W9425G6KH-5I TR
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 66-TSSOP (0.400", 10.16mm Width)
- Datasheet:
-
W9425G6KH-5I TR.pdf
- Description:
- IC DRAM 256MBIT PAR 66TSOP II
- Quantity:
- Payment:
- Shipping:
Inventory:818
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Product details
Overview
W9425G6KH-5I TR from Winbond is a 4 M × 4 banks × 16-bit DDR SDRAM operating at 200 MHz clock frequency with 2.5 V ± 0.2 V supply, CAS latency options of 2/2.5/3, and industrial temperature range (–40°C to +85°C); it delivers up to 400 M words/s bandwidth and supports auto-refresh, self-refresh, and power-down modes for embedded main memory applications.
For engineers reviewing the W9425G6KH-5I TR datasheet, W9425G6KH-5I TR pinout, W9425G6KH-5I TR application, or W9425G6KH-5I TR equivalent, this page provides verified timing parameters, bank activation and precharge command behavior, SSTL_2 interface compliance, TSOP II 66-pin package mapping, and industrial-grade thermal validation - all critical for DDR400/CL3 system integration and memory controller co-design.
Technical Context
The W9425G6KH-5I TR implements a double-data-rate architecture synchronized to both edges of DQS, with differential CLK/CLK inputs and DLL-based timing control enabled via Extended Mode Register Set. It supports programmable burst lengths (2/4/8), interleave/sequential addressing, and write latency = 1.
Its command decoder interprets RAS/CAS/WE combinations for bank activate, precharge (per-bank or all), read/write (with or without auto-precharge), mode register setup, and refresh operations. Internal refresh counter manages 7.8 µs interval (8K/64 ms) with up to eight concurrent auto-refresh commands permitted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4,194,304 words × 4 banks × 16 bits = 128 Mbit density |
| Max Clock Frequency | 200 MHz - defines maximum data transfer rate of 400 MT/s |
| CAS Latency | Programmable CL = 2, 2.5, or 3 - determines read access delay in clock cycles |
| tCK (Cycle Time) | 5–12 ns - sets minimum clock period per CL setting (e.g., 5 ns min for CL=3) |
| tRAS / tRC | Min 40 ns / 55 ns - constrains active-to-precharge and active-to-refresh timing windows |
| Supply Voltage | 2.5 V ± 0.2 V - requires stable SSTL_2-compatible power rail |
| Operating Temperature | –40°C to +85°C - validated for industrial ambient operation |
| Refresh Interval | 7.8 µs average (8K rows / 64 ms) - mandates precise refresh scheduler alignment |
Pinout & Package
W9425G6KH-5I TR is packaged in RoHS-compliant, lead-free TSOP II (Thin Small Outline Package, Type II) with 66 pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A12 | Address Input | Multiplexed row/column address; A10 controls per-bank vs. all-bank precharge |
| BA0, BA1 | Bank Select | Selects one of four internal banks during activate/read/write commands |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional data bus synchronized to both edges of DQS |
| LDQS, UDQS | Data Strobe | Lower/upper byte strobes; edge-aligned on read, center-aligned on write |
| LDM, UDM | Data Mask | Byte-level write masking: LDM for DQ0–DQ7, UDM for DQ8–DQ15 |
| CLK, CLK | Differential Clock | Timing reference sampled at crossing point; enables DLL lock and jitter tolerance |
| CKE | Clock Enable | Controls entry/exit from power-down, suspend, and self-refresh modes |
| CS, RAS, CAS, WE | Command Inputs | Decode bank activate, precharge, read, write, MRS, EMRS, and refresh |
| VDD / VDDQ | Power Supplies | VDD = core logic (2.5 V); VDDQ = I/O buffer (separate rail for noise isolation) |
| VSS / VSSQ | GND Planes | VSS = core ground; VSSQ = I/O ground - prevents switching noise coupling |
| VREF | Input Reference | Stable 1.25 V reference for SSTL_2 input threshold calibration |
Key Features
| Feature | Design Value |
|---|---|
| Double Data Rate Architecture | Two data transfers per clock cycle - doubles effective bandwidth without increasing clock frequency |
| Programmable Burst Length | 2, 4, or 8 - optimizes bus efficiency for sequential vs. random access patterns |
| Auto-Precharge Support | Integrated post-read/write precharge - eliminates external timing management overhead |
| Self-Refresh Mode | 2 mA max current at –40°C to +85°C - maintains data integrity during host sleep states |
| SSTL_2 Interface Compliance | Guaranteed signal integrity with 1.25 V reference and controlled slew rates - ensures compatibility with DDR400 controllers |
| TSOP II 66-pin RoHS Package | Industry-standard footprint with lead-free finish - supports automated PCB assembly and thermal reliability |
Applications
| Industrial HMI Panels | Network Router Buffers |
|---|---|
Use Scenario: Touch-enabled operator interfaces in factory automation systems requiring persistent display memory and low-power standby. IC Role / Device Role / Timing Role: Main system memory storing GUI assets and runtime variables; operates in self-refresh during panel idle periods. Use Value: Industrial temperature rating (–40°C to +85°C) and 2 mA self-refresh current ensure reliable data retention across wide ambient swings without forced cooling. | Use Scenario: Packet buffering in Layer 3 enterprise routers handling mixed traffic loads with bursty ingress/egress patterns. IC Role / Device Role / Timing Role: High-bandwidth temporary storage for packet headers and payload fragments; accessed via DDR400 controller with CL=2.5 latency tuning. Use Value: 400 MT/s throughput and programmable burst length (4 or 8) match typical Ethernet frame sizes and reduce memory controller arbitration overhead. |
| Medical Imaging Controllers | Automated Test Equipment (ATE) |
Use Scenario: Real-time image acquisition subsystems capturing X-ray or ultrasound frames at 30+ fps with minimal latency. IC Role / Device Role / Timing Role: Frame buffer memory interfaced to FPGA-based pixel processors; uses bank interleaving for concurrent read/write operations. Use Value: Four independent banks enable 2-bank or 4-bank interleave reads (CL=2, BL=4), sustaining >300 MB/s sustained bandwidth for continuous streaming. | Use Scenario: High-speed digital pattern generators validating ASIC I/O timing margins under varying voltage/temperature conditions. IC Role / Device Role / Timing Role: Calibration and stimulus memory holding test vectors; accessed with precise tRCD/tRP/tRAS timing control. Use Value: Verified AC timing parameters (e.g., tRAS ≥40 ns, tRC ≥55 ns) allow deterministic setup/hold margin verification against JEDEC DDR specifications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DDR SDRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MT46V32M16-5B:J | Same 128 Mbit density, 200 MHz, CL=2.5/3, but uses 60-pin TSOP and has higher IDD0 (75 mA vs. 65 mA) | Valid for commercial-temp (0°C to +70°C) designs only; lacks industrial temp validation | Select when cost-sensitive commercial applications prioritize broad distributor availability over extended temperature support |
| IS42S16160F-5BL | Identical 4M×4×16 organization and TSOP II 66-pin package, but rated for CL=2/3 only and no CL=2.5 option | Compatible pinout and timing, but requires controller reconfiguration if CL=2.5 is used in original design | Choose for drop-in replacement where CL=2 or CL=3 suffices and existing layout matches IS42S16160F-5BL footprint |
Compared with MT46V32M16-5B:J and IS42S16160F-5BL, the W9425G6KH-5I TR uniquely combines industrial temperature range, CL=2.5 support, and 65 mA typical active current - making it optimal for thermally constrained embedded systems requiring flexible latency tuning and guaranteed data retention.
Availability
W9425G6KH-5I TR is available at Aetrix Electronics and suitable for industrial HMI panels, network router buffers, medical imaging controllers, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for W9425G6KH-5I TR 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 DRAM products for industrial, automotive, and communications markets.
The W9425G6KH-5I TR belongs to Winbond's DDR SDRAM product line, designed specifically for cost-sensitive, high-reliability embedded systems requiring industrial-grade thermal performance and JEDEC-compliant DDR400 interface timing.
FAQ
What is the maximum supported CAS latency for W9425G6KH-5I TR?
The W9425G6KH-5I TR supports three CAS latency settings: CL = 2, CL = 2.5, and CL = 3. These are programmable via the Mode Register Set (MRS) command during initialization. CL = 2.5 is confirmed in the datasheet's Features section and Key Parameters table, and is required for DDR400/CL3 compliance at 200 MHz operation. The W9425G6KH-5I TR must be configured with the appropriate CL value before any read commands are issued.
Does W9425G6KH-5I TR support self-refresh mode, and what is its current draw?
Yes, the W9425G6KH-5I TR supports self-refresh mode, which retains memory contents without external clocking. Its maximum self-refresh current is 2 mA across the full industrial temperature range (–40°C to +85°C), as specified in the Order Information table and Electrical Characteristics section. This low current enables extended battery-backed or low-power standby operation in applications like portable medical devices or remote sensors where the W9425G6KH-5I TR serves as persistent working memory.
What package type and pin count does W9425G6KH-5I TR use?
The W9425G6KH-5I TR uses a RoHS-compliant, lead-free TSOP II (Thin Small Outline Package, Type II) with 66 pins. This is explicitly stated in the Features section and confirmed by the Pin Configuration diagram (page 6) and Pin Description table (page 7) of the datasheet. The TSOP II 66-pin footprint is industry-standard for x16 DDR SDRAMs and ensures mechanical and thermal compatibility with existing DDR400 PCB layouts.
How many internal banks does W9425G6KH-5I TR have, and how are they selected?
The W9425G6KH-5I TR contains four internal banks, organized as 4 M × 4 banks × 16 bits. Bank selection is performed using the BA0 and BA1 inputs, which are sampled during bank activate, read, and write commands. As documented in the Pin Description and Command Function sections, BA0/BA1 determine which of the four banks (Bank #0 to Bank #3) is targeted for row activation or column access - enabling true bank interleaving to hide tRCD and tRP delays in high-throughput applications using the W9425G6KH-5I TR.
What is the refresh interval requirement for W9425G6KH-5I TR?
The W9425G6KH-5I TR requires an average refresh interval of 7.8 µs, corresponding to 8K rows refreshed over 64 ms (8K/64 ms). This is specified in the Features section and reinforced in Functional Description section 8.2.13. The device allows up to eight auto-refresh commands to be posted, with a maximum absolute interval between successive commands of 8 × tREFI (62.4 µs), providing scheduling flexibility for memory controllers integrating the W9425G6KH-5I TR into real-time systems.
W9425G6KH-5I TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Winbond Electronics Corporation
- Series:
- -
- Package/Case:
- 66-TSSOP (0.400", 10.16mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- DRAM
- Technology:
- SDRAM - DDR
- Memory Size:
- 256Mbit
- Memory Organization:
- 16M x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- 200 MHz
- Write Cycle Time - Word, Page:
- 15ns
- Access Time:
- 55 ns
- Voltage - Supply:
- 2.3V ~ 2.7V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 66-TSOP II
W9425G6KH-5I TR FAQ
1.How can I place an order for W9425G6KH-5I TR through Aetrix?
Please submit a Request for Quotation (RFQ) for W9425G6KH-5I TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for W9425G6KH-5I TR reliable?
The price and inventory of W9425G6KH-5I TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W9425G6KH-5I TR is usually 5 days.
3.What payment methods are accepted for W9425G6KH-5I TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W9425G6KH-5I TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W9425G6KH-5I TR?
W9425G6KH-5I TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W9425G6KH-5I TR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for W9425G6KH-5I TR?
For technical support, including W9425G6KH-5I TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W9425G6KH-5I TR requirements.
6.How does Aetrix verify that W9425G6KH-5I TR is sourced from the original manufacturer or authorized distributors?
All W9425G6KH-5I TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that W9425G6KH-5I TR meets industry standards.
7.What is the process for return or replacement of W9425G6KH-5I TR?
All W9425G6KH-5I TR units undergo pre-shipment inspection (PSI). If there is an issue with W9425G6KH-5I TR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The W9425G6KH-5I TR part is unused and in its original packaging.
Return procedure for W9425G6KH-5I TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
W9425G6KH-5I TR Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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