K4E640412D 16Mx4 EDO Mode DRAM

Overview

The K4E640412D is a 16Mx4 Extended Data Out (EDO) Mode DRAM component manufactured using Samsung's advanced CMOS process technology. This high-performance memory device is designed to deliver high bandwidth, low power consumption, and reliable operation for various computing and embedded applications. The device supports multiple refresh modes, including CAS-before-RAS, RAS-only, Hidden refresh, and Self-refresh (L-version only), making it suitable for systems requiring efficient memory management.

Features

• Extended Data Out (EDO) Mode Operation: Enhances data access speed by allowing data output to remain valid after CAS transitions, improving system performance.
• Multiple Refresh Modes: Supports CAS-before-RAS, RAS-only, and Hidden refresh for flexible memory management.
• Self-Refresh Capability (L-version only): Enables low-power operation by allowing the device to refresh itself without external control signals.
• Fast Parallel Test Mode: Facilitates efficient testing during manufacturing and quality assurance.
• LVTTL (3.3V) Compatibility: Inputs and outputs are compatible with 3.3V LVTTL logic levels, ensuring seamless integration with modern systems.
• Early Write or Output Enable Controlled Write: Provides flexibility in write operation timing.
• JEDEC Standard Pinout: Ensures compatibility with industry-standard designs and layouts.
• Package Options: Available in Plastic SOJ and TSOP(II) packages for versatile PCB mounting.
• Power Supply: Operates at +3.3V ±0.3V, suitable for low-power applications.

Applications

The K4E640412D is designed for use in a variety of electronic systems requiring high-speed, low-power memory solutions. Typical applications include:

• Desktop and Laptop Computers: Used as system memory in PCs and notebooks.
• Embedded Systems: Ideal for industrial control systems, medical devices, and automotive electronics.
• Networking Equipment: Suitable for routers, switches, and other communication devices.
• Consumer Electronics: Used in gaming consoles, set-top boxes, and multimedia devices.
• Test and Measurement Instruments: Provides reliable memory for data acquisition and processing.

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (Vcc): -0.5V to +4.6V
• Input Voltage (Vin): -0.5V to Vcc + 0.5V
• Output Voltage (Vout): -0.5V to Vcc + 0.5V
• Operating Temperature Range: 0°C to +70°C (Commercial), -40°C to +85°C (Industrial)
• Storage Temperature Range: -55°C to +150°C

Recommended Operating Conditions

• Supply Voltage (Vcc): +3.3V ±0.3V
• Input High Voltage (VIH): 2.0V to Vcc + 0.3V
• Input Low Voltage (VIL): -0.3V to +0.8V
• Output High Voltage (VOH): 2.4V (min) at IOH = -4.0mA
• Output Low Voltage (VOL): 0.4V (max) at IOL = +8.0mA

Timing Characteristics

• RAS Precharge Time (tRP): 20ns (min)
• CAS Precharge Time (tCP): 20ns (min)
• RAS to CAS Delay (tRCD): 20ns (min)
• CAS Pulse Width (tCAS): 20ns (min)
• Access Time from CAS (tCAC): 15ns (max)
• Refresh Cycle Time (tREF): 64ms (max)

Package Information

Plastic SOJ Package

• Package Dimensions: 400mil width, 20-pin configuration
• Pin Pitch: 1.27mm
• Lead Material: Copper alloy
• Mounting Style: Surface mount (SMD)

TSOP(II) Package

• Package Dimensions: 10.16mm x 18.41mm, 20-pin configuration
• Pin Pitch: 0.5mm
• Lead Material: Copper alloy
• Mounting Style: Surface mount (SMD)

Functional Block Diagram

The K4E640412D features a memory array of 16,777,216 x 4 cells, organized for efficient data storage and retrieval. The control clocks (RAS, CAS, W) manage the timing of read and write operations, while the address inputs (A0~A12) select the memory locations. The device includes a 4K refresh cycle capability to maintain data integrity.

Conclusion

The K4E640412D 16Mx4 EDO Mode DRAM is a versatile and high-performance memory solution suitable for a wide range of applications. Its advanced features, including multiple refresh modes and LVTTL compatibility, make it an excellent choice for systems requiring reliable and efficient memory operation. With options for both SOJ and TSOP(II) packages, the K4E640412D offers flexibility in design and integration.