Overview
The IS42S16400J-7TLI is a 64-Mbit 3.3 V synchronous DRAM (SDRAM) memory designed for high-speed data buffering and memory expansion in digital systems. It is widely used in embedded controllers, graphics frame buffers, and communication equipment, where fast synchronous data access and reliable refresh control are required.
The device is offered in standard tray format, and a tape-and-reel version (IS42S16400J-7TLI-TR) is available for automated SMT assembly.
Core Parameters
| Parameter | Specification |
|---|---|
| Memory Density | 64 Mbit (4M x 16) |
| Memory Type | SDRAM |
| Clock Frequency | Up to 143 MHz |
| Access Time | ~5.4 ns |
| Supply Voltage | 3 V – 3.6 V |
| Interface | Parallel LVTTL |
| Package | 54-pin TSOP-II |
| Operating Temp | –40 °C to +85 °C |
These parameters make the device suitable for mid-capacity buffer memory applications, especially where high-speed synchronous access at 143 MHz and robust industrial temperature support are critical.
Features
- Synchronous DRAM with 64 Mbit density and 16-bit data bus
- Up to 143 MHz clock operation for high-speed data transfer
- Programmable burst length and CAS latency for flexible timing control
- Auto-refresh and self-refresh modes for efficient memory retention
- LVTTL compatible I/O interface
- Standard surface-mount TSOP-II package with LVTTL I/O signaling
- Tape-and-reel packaging option (IS42S16400J-7TLI-TR) for high-throughput assembly
These features support stable and efficient data buffering in systems requiring frequent read/write bursts.
Typical Application Scenarios
- Embedded processors and microcontrollers that require external SDRAM for program or data buffering
- Graphics and display controllers where frame buffer memory enhances rendering performance
- Networking and communication devices needing rapid data queueing and packet buffering
- Industrial automation equipment with real-time system state logging
- Instrumentation and test systems used in high-speed data acquisition
Its synchronous architecture and high transfer rates make it suitable for any design with timing-critical memory access.
In embedded systems built around the STM32F429IGT6, external SDRAM such as the IS42S16400J-7TLI is commonly used to provide additional memory for graphics frame buffers, data caching, and complex application processing. This combination supports stable high-speed memory access while enabling advanced HMI and data-intensive embedded designs.
Performance Comparison
Within the category of 64 Mbit SDRAMs, the IS42S16400J-7TLI distinguishes itself by offering:
- Synchronous operation up to 143 MHz
- Support for burst read/write sequences
- LVTTL standardized input/output signaling
- Robust industrial temperature rating
Compared to older asynchronous DRAM devices, synchronous SDRAM offers predictable timing and burst performance which is advantageous in systems with tight timing requirements, such as graphics and embedded buffering.
Conclusion
The IS42S16400J-7TLI is a proven 64 Mbit SDRAM solution that supports efficient synchronous memory access for mid-range buffering applications. Its combination of moderate capacity, high clock support, and flexible burst modes make it a practical choice for embedded, graphics, and communication designs requiring reliable dynamic memory.
Manufacturer Profile
Integrated Silicon Solution, Inc. (ISSI) is a fabless semiconductor company focused on memory solutions, including SRAM, DRAM, and embedded flash products for industrial, networking, consumer, and communications markets. ISSI’s SDRAM products are designed for high-speed data buffering and wide voltage compatibility, with continued support through new variants such as IS42S16400N-7TLI, which supersedes earlier J-series versions.
FAQ
1. What type of memory is the IS42S16400J-7TLI?
IS42S16400J-7TLI is a 64 Mbit synchronous DRAM (SDRAM) memory used for high-speed data buffering and external memory expansion.
2. What are common operating conditions for this memory?
It operates from a 3.3 V supply with a maximum clock frequency of 143 MHz and supports –40 °C to +85 °C operation.
3. What is the packaging option for IS42S16400J-7TLI?
The standard packaging is tray, and IS42S16400J-7TLI-TR refers to the tape-and-reel packaging option for automated manufacturing.
4. How can I verify the quality of the IS42S16400J-7TLI described in this blog?
7SEtronic has a complete quality inspection SOP process, including label verification, visual inspection, and X-ray testing, which can help ensure authenticity and reliability.
For more information and to review our available inventory, please contact our team for detailed pricing, current stock levels, and any additional technical support you may need.
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