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NE57814

Philipss
Part Number NE57814
Manufacturer Philipss
Description DDR memory termination regulator with standby mode and enhanced efficiency
Published May 7, 2005
Detailed Description INTEGRATED CIRCUITS NE57814 DDR memory termination regulator with standby mode and enhanced efficiency Product data Sup...
Datasheet PDF File NE57814 PDF File

NE57814
NE57814

Overview
INTEGRATED CIRCUITS NE57814 DDR memory termination regulator with standby mode and enhanced efficiency Product data Supersedes data of 2003 Jan 22 2003 Apr 03 Philips Semiconductors Philips Semiconductors Product data DDR memory termination regulator with standby mode and enhanced efficiency NE57814 DESCRIPTION The NE57814 is designed to provide power for termination of a DDR memory bus.
It significantly reduces parts count, board space, and overall system cost over previous switching solutions.
The NE57814 has an independent power source pin (VD) for further reducing the operational power and a standby low-power mode for energy-sensitive portable applications.
The DDR terminator regulator provides a very accurate reference (RefOut) and termination voltage (VTT) which is one-half of the RAM supply voltage over wide range of current demand.
HSO8 (TOP) HSO8 (BOTTOM) FEATURES • Fast transient response time • Over-temperature protection • Over-current protection • Commercial (0 °C to 70 °C) temperature range • High bandwidth drivers minimize requirement for output hold-up filter capacitors APPLICATIONS • Internal divider maintains termination voltage at 1/2 memory supply voltage • RefOut output pin for other memory and control components • Laptop computers • Desktop microcomputer systems • Workstations • Set-top boxes • Servers • Networking routers and switches • Video display systems • Personal video recorders • Game machines • Embedded systems SIMPLIFIED SYSTEM DIAGRAM DIMM0 DIMM1 RefOut 0.
1 µF VD VDD Control & Address VTT SENSE MEMORY CONTROLLER STANDBY (OPTIONAL) NE57814 Data VTT 100 µF RS 20 Ω (typical) RT 27 Ω (typical) TERMINATION POWER ExtRefIn (OPTIONAL) SL01877 Figure 1.
Simplified system diagram.
2003 Apr 03 2 Philips Semiconductors Product data DDR memory termination regulator with standby mode and enhanced efficiency NE57814 ORDERING INFORMATION PACKAGE TYPE NUMBER NAME NE57814DD HSO8 DESCRIPTION plastic thermal enhanced small...


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