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NE57814DD PDF даташит

Спецификация NE57814DD изготовлена ​​​​«Philipss» и имеет функцию, называемую «DDR memory termination regulator with standby mode and enhanced efficiency».

Детали детали

Номер произв NE57814DD
Описание DDR memory termination regulator with standby mode and enhanced efficiency
Производители Philipss
логотип Philipss логотип 

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NE57814DD Даташит, Описание, Даташиты
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









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NE57814DD Даташит, Описание, Даташиты
Philips Semiconductors
DDR memory termination regulator with
standby mode and enhanced efficiency
Product data
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)
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
Internal divider maintains termination voltage at 1/2 memory
supply voltage
RefOut output pin for other memory and control components
APPLICATIONS
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
HSO8 (BOTTOM)
RefOut
0.1 µF
VD VDD
MEMORY
CONTROLLER
RS
20 (typical)
Control & Address
Data
VTT SENSE
VTT
NE57814
TERMINATION
POWER
RT
27 (typical)
100 µF
Figure 1. Simplified system diagram.
SL01877
STANDBY
(OPTIONAL)
ExtRefIn
(OPTIONAL)
2003 Apr 03
2









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NE57814DD Даташит, Описание, Даташиты
Philips Semiconductors
DDR memory termination regulator with
standby mode and enhanced efficiency
Product data
NE57814
ORDERING INFORMATION
TYPE NUMBER
PACKAGE
NAME
DESCRIPTION
NE57814DD
HSO8
plastic thermal enhanced small outline package; 8 leads;
body width 3.9 mm; exposed die pad
VERSION
SOT786-2
TEMPERATURE
RANGE
0 °C to +70 °C
PIN CONFIGURATION
VSS 1
VTT SENSE 2
VTT 3
VD 4
8 RefOut
7 STANDBY
6 ExtRefIn
5 VDD
SL01878
Figure 2. Pin configuration.
PIN DESCRIPTION
PIN SYMBOL
DESCRIPTION
1 VSS
2 VTT SENSE
3 VTT
4 VD
5 VDD
6 ExtRefIn
7 STANDBY
Terminator ground
VTT remote sense.
Connect to pin 3 (VTT)
Terminator voltage output
VTT output MOSFET drain
DDRAM supply voltage
Reference node used for external
control of VTT
Places device into standby mode
(active-LOW)
8 RefOut
Buffered VTT reference output, used
for cascading terminators
NOTE:
1. The thermal heatspreader connects electrically to VSS internally
and provides enhancement to thermal conductivity, but it should
not be used as the primary connection to ground. Device
specifications apply to use of the VSS pin as the connection to
ground.
MAXIMUM RATINGS
SYMBOL
PARAMETER
VDD VDD to VSS voltage
Tamb
Operating ambient temperature
Tstg Storage temperature
Tj Junction temperature
Rth(j-a)
Thermal resistance, junction to ambient (Note 1)
P Power dissipation (Note 1)
NOTE:
1. Tested on a minimum footprint on a four-layer PCB per JEDEC specification JESD51-7.
MIN.
–0.3
0
–40
TYP.
38.5
MAX.
+3.6
+70
+165
160
2.1
UNIT
V
°C
°C
°C
°C/W
W
2003 Apr 03
3










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Номер в каталогеОписаниеПроизводители
NE57814DDDDR memory termination regulator with standby mode and enhanced efficiencyPhilipss
Philipss

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