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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Winbond Electronics Corporation W9864G2JH-6I TR

Name: W9864G2JH-6I TR
Brand: Winbond Electronics Corporation
SKU: W9864G2JH-6I TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: W9864G2JH-6I TR

Manufacturer:: Winbond Electronics Corporation

Category:: Memory

Package:: 86-TFSOP (0.400", 10.16mm Width)

Datasheet:: W9864G2JH-6I TR.pdf

Description:: IC DRAM 64MBIT LVTTL 86TSOP II

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Product details

Overview

W9864G2JH-6I TR from Winbond is a 512K × 4 banks × 32-bit synchronous DRAM (SDRAM) operating at 166 MHz with CAS Latency 3, 3.3V ±0.3V supply, and industrial temperature range (−40°C to +85°C), used as main memory in embedded controllers and industrial HMIs requiring burst-access bandwidth up to 664 MB/s.

For engineers reviewing the W9864G2JH-6I TR datasheet, W9864G2JH-6I TR pinout, W9864G2JH-6I TR application, or W9864G2JH-6I TR equivalent, this page delivers verified timing parameters, TSOP II 86-pin terminal mapping, industrial-grade self-refresh behavior, and functional alternatives for SDRAM-based memory subsystems.

Technical Context

This SDRAM implements four independent 512K-word banks with interleaved access capability to hide precharge latency. It supports programmable burst lengths (1, 2, 4, 8, full-page) and dual burst modes (sequential/interleave), controlled via a Mode Register set during initialization.

It features LVTTL-compatible interface signaling, DQM-controlled byte masking (DQM0–DQM3), auto-precharge triggered by A10 high during read/write, and power management modes including Self Refresh (2 mA typical) and Power Down, all synchronized to CLK rising edges with CKE-gated clock enable logic.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	524,288 words × 4 banks × 32 bits = 67,108,864 bits (8 MB)
Max Clock Frequency	166 MHz - defines maximum data transfer rate of 664 MB/s (166M × 4 bytes)
CAS Latency	CL = 3 - fixed 3-clock delay between column address strobe and first valid data output
Burst Length	1, 2, 4, 8, or full-page - determines number of consecutive data transfers per command
Supply Voltage	3.3 V ± 0.3 V - requires stable LDO or regulator meeting DC specs; not compatible with 2.5 V systems
Operating Temperature	−40°C to +85°C - qualified for industrial environments without derating
Refresh Rate	4,096 cycles / 64 ms - mandates refresh controller support for CBR mode every 15.625 µs average interval

Pinout & Package

W9864G2JH-6I TR is housed in a RoHS-compliant, lead-free 86-pin TSOP II (Thin Small Outline Package, Type II) with standard 0.5 mm pitch and 12.0 mm × 20.0 mm body dimensions.

Pin/Terminal	Circuit Role	Design Meaning
A0–A10	Address Input	Multiplexed row/column address lines; A10 controls all-bank precharge when sampled during PRE command
BS0, BS1	Bank Select	Two-bit encoding selects one of four internal banks during ACT or READ/WRITE commands
DQ0–DQ31	Data I/O	32-bit bidirectional data bus; each byte group masked independently by DQM0–DQM3
CS, RAS, CAS, WE	Command Control	Four active-low control signals decoded synchronously on CLK rising edge to define operation
CLK, CKE	Timing Interface	CLK provides synchronous edge sampling; CKE enables/disables internal clock domain (Power Down/Self Refresh entry)
DQM0–DQM3	Data Mask	Per-byte write blocking (zero-latency) and read output disable (2-cycle latency to Hi-Z)
VDD / VSS	Core Power/Ground	3.3 V supply and return for logic circuitry; separate VDDQ/VSSQ required for I/O buffers
VDDQ / VSSQ	I/O Power/Ground	Dedicated 3.3 V supply/ground for DQ drivers/receivers to minimize switching noise coupling

Key Features

Feature	Design Value
Industrial Temp Grade	Rated −40°C to +85°C with guaranteed 166 MHz/CL3 operation and 2 mA self-refresh current
Programmable Burst Modes	Configurable sequential or interleave addressing via Mode Register - enables optimal cache-line alignment or DMA burst efficiency
Auto-precharge Support	A10-driven automatic bank precharge after read/write - eliminates explicit PRE command overhead in streaming workloads
Per-Byte Write Masking	DQM0–DQM3 allow selective byte writes without read-modify-write - critical for mixed-endian or partial-register updates
Low-Power States	Self Refresh (2 mA) and Power Down modes reduce standby power - essential for battery-backed or energy-constrained systems

Applications

Industrial HMI Memory Buffer	Embedded Controller Main RAM
Use Scenario: Touchscreen-based human-machine interface running real-time graphics rendering and local data logging. IC Role / Device Role / Timing Role: Primary working memory for ARM Cortex-M7 MCU executing frame buffer management and event queue handling. Use Value: 166 MHz clock and 4-bank interleaving sustain >500 MB/s sustained read throughput needed for 800×480 @ 60 Hz UI refresh with minimal CPU intervention.	Use Scenario: Programmable logic controller (PLC) with deterministic I/O scanning and ladder logic execution. IC Role / Device Role / Timing Role: System RAM for dual-core RISC-V processor managing cyclic task scheduling and buffered serial protocol stacks. Use Value: Industrial temperature rating and auto-precharge ensure reliable operation across factory floor thermal swings while reducing command overhead in time-critical scan cycles.
Network Edge Gateway Cache	Medical Device Data Acquisition Buffer
Use Scenario: Low-power cellular IoT gateway aggregating sensor telemetry and performing local packet buffering before LTE transmission. IC Role / Device Role / Timing Role: Temporary storage for encrypted payload assembly and TCP retransmission queue under intermittent connectivity. Use Value: Self-refresh current ≤2 mA enables multi-hour battery backup during network outages without compromising data integrity or timing predictability.	Use Scenario: Portable ECG monitor capturing 12-lead analog waveforms at 1 kS/s with onboard FFT processing. IC Role / Device Role / Timing Role: High-bandwidth buffer between ADC interface and DSP core for real-time signal analysis. Use Value: 32-bit bus width and burst-length-8 support deliver 531 MB/s peak bandwidth - sufficient for concurrent acquisition, filtering, and display update without pipeline stalls.

Industrial HMI Memory Buffer

Embedded Controller Main RAM

Use Scenario: Touchscreen-based human-machine interface running real-time graphics rendering and local data logging.

IC Role / Device Role / Timing Role: Primary working memory for ARM Cortex-M7 MCU executing frame buffer management and event queue handling.

Use Value: 166 MHz clock and 4-bank interleaving sustain >500 MB/s sustained read throughput needed for 800×480 @ 60 Hz UI refresh with minimal CPU intervention.

Use Scenario: Programmable logic controller (PLC) with deterministic I/O scanning and ladder logic execution.

IC Role / Device Role / Timing Role: System RAM for dual-core RISC-V processor managing cyclic task scheduling and buffered serial protocol stacks.

Use Value: Industrial temperature rating and auto-precharge ensure reliable operation across factory floor thermal swings while reducing command overhead in time-critical scan cycles.

Network Edge Gateway Cache

Medical Device Data Acquisition Buffer

Use Scenario: Low-power cellular IoT gateway aggregating sensor telemetry and performing local packet buffering before LTE transmission.

IC Role / Device Role / Timing Role: Temporary storage for encrypted payload assembly and TCP retransmission queue under intermittent connectivity.

Use Value: Self-refresh current ≤2 mA enables multi-hour battery backup during network outages without compromising data integrity or timing predictability.

Use Scenario: Portable ECG monitor capturing 12-lead analog waveforms at 1 kS/s with onboard FFT processing.

IC Role / Device Role / Timing Role: High-bandwidth buffer between ADC interface and DSP core for real-time signal analysis.

Use Value: 32-bit bus width and burst-length-8 support deliver 531 MB/s peak bandwidth - sufficient for concurrent acquisition, filtering, and display update without pipeline stalls.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IS42S16400F-6BLI	16M × 16-bit organization, same 166 MHz/CL3 speed, but 54-pin TSOP	Requires PCB redesign due to different pin count, width, and address/data multiplexing scheme	Choose if board layout allows 54-pin footprint and system uses 16-bit data path
MT48LC4M32B2P-6A:J	Same 512K × 4 × 32-bit density and 86-pin TSOP II package, but commercial temp grade (0°C to +70°C)	Lacks industrial temperature qualification; self-refresh current not specified over full range	Select only for non-industrial environments where cost sensitivity outweighs thermal robustness

Compared with IS42S16400F-6BLI and MT48LC4M32B2P-6A:J, W9864G2JH-6I TR uniquely combines industrial temperature operation, 86-pin TSOP II compatibility, and verified 2 mA self-refresh in its grade - making it the only drop-in option for legacy-replacement SDRAM designs requiring extended thermal reliability without layout change.

Availability

W9864G2JH-6I TR is available at Aetrix Electronics and suitable for industrial HMIs, embedded controllers, network edge gateways, and medical data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for W9864G2JH-6I 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 SPI NOR Flash, PSRAM, and SDR/DDR SDRAM for industrial and automotive markets.

W9864G2JH belongs to Winbond's legacy parallel SDRAM product line, designed specifically for cost-sensitive, thermally demanding embedded systems needing reliable asynchronous-to-synchronous memory bridging without DDR complexity.

FAQ

What is the maximum operating frequency and CAS latency supported by W9864G2JH-6I TR?

W9864G2JH-6I TR is rated for 166 MHz maximum clock frequency with CAS Latency 3 (CL3) across its full industrial temperature range (−40°C to +85°C). This specification is validated per the device's AC timing table and applies to all supported burst lengths and command sequences. The -6I suffix explicitly denotes this speed/temperature grade, distinguishing it from the faster -5 (200 MHz) and slower -7 (143 MHz) variants. W9864G2JH-6I TR must be initialized with CL3 in the Mode Register to meet timing guarantees.

Does W9864G2JH-6I TR support auto-precharge, and how is it enabled?

Yes, W9864G2JH-6I TR supports auto-precharge on both read and write commands. It is enabled by driving A10 high during the assertion of a READ or WRITE command (CS, RAS, CAS, WE active). When triggered, the SDRAM automatically initiates precharge of the accessed bank after the burst completes - eliminating the need for a separate PRE command. This feature reduces command overhead in sequential access patterns. W9864G2JH-6I TR does not support auto-precharge for full-page bursts, and the tDAL (Data-in to Active) timing constraint (tWR + tRP) must be observed before reactivating the bank.

What package type and pin count does W9864G2JH-6I TR use?

W9864G2JH-6I TR uses an 86-pin TSOP II (Thin Small Outline Package, Type II) with lead-free, RoHS-compliant construction. Its mechanical dimensions are 12.0 mm × 20.0 mm with 0.5 mm pin pitch. The pinout includes dedicated VDDQ/VSSQ rails for I/O power isolation, four DQM lines for byte masking, and BS0/BS1 for bank selection - all consistent with JEDEC-standard SDRAM interface requirements. W9864G2JH-6I TR is not pin-compatible with 54-pin or 66-pin SDRAM packages.

How does W9864G2JH-6I TR handle refresh operations in low-power modes?

W9864G2JH-6I TR supports Self Refresh mode, entered via the Self Refresh Command (CS, RAS, CAS, WE = L, CKE = L), where it maintains data integrity using an internal oscillator while drawing ≤2 mA typical current. During Self Refresh, external clocks and control signals (except CKE) are ignored, and the internal refresh counter executes 4,096 CBR cycles autonomously. W9864G2JH-6I TR does not perform refresh in Power Down mode - that mode must be exited before refresh can resume. Exit from Self Refresh requires CKE high followed by tXSR delay before issuing new commands.

Can W9864G2JH-6I TR be used as a direct replacement for other Winbond SDRAMs like W9864G2JH-6?

W9864G2JH-6I TR is functionally identical to W9864G2JH-6 in electrical and timing specifications (166 MHz/CL3), differing only in temperature qualification: W9864G2JH-6I TR is rated for −40°C to +85°C, while W9864G2JH-6 is commercial grade (0°C to +70°C). Both share the same pinout, package, and AC/DC characteristics. Therefore, W9864G2JH-6I TR can replace W9864G2JH-6 in industrial applications without hardware or firmware changes - provided the design operates within the extended temperature range and accounts for potential minor self-refresh current variation.

W9864G2JH-6I TR Specifications

Product attributes: Attribute value

Manufacturer:: Winbond Electronics Corporation

Series:: -

Package/Case:: 86-TFSOP (0.400", 10.16mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Not For New Designs

Programmable:: Not Verified

Memory Type:: Volatile

Memory Format:: DRAM

Technology:: SDRAM

Memory Size:: 64Mbit

Memory Organization:: 2M x 32

Memory Interface:: LVTTL

Clock Frequency:: 166 MHz

Write Cycle Time - Word, Page:: -

Access Time:: 5 ns

Voltage - Supply:: 3V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 86-TSOP II

W9864G2JH-6I TR FAQ

1.How can I place an order for W9864G2JH-6I TR through Aetrix?

Please submit a Request for Quotation (RFQ) for W9864G2JH-6I 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 W9864G2JH-6I TR reliable?

The price and inventory of W9864G2JH-6I TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W9864G2JH-6I TR is usually 5 days.

3.What payment methods are accepted for W9864G2JH-6I TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W9864G2JH-6I TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for W9864G2JH-6I TR?

W9864G2JH-6I TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your W9864G2JH-6I 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 W9864G2JH-6I TR?

For technical support, including W9864G2JH-6I TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W9864G2JH-6I TR requirements.

6.How does Aetrix verify that W9864G2JH-6I TR is sourced from the original manufacturer or authorized distributors?

All W9864G2JH-6I 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 W9864G2JH-6I TR meets industry standards.

7.What is the process for return or replacement of W9864G2JH-6I TR?

All W9864G2JH-6I TR units undergo pre-shipment inspection (PSI). If there is an issue with W9864G2JH-6I 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 W9864G2JH-6I TR part is unused and in its original packaging.

Return procedure for W9864G2JH-6I TR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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