DS1640S ,Personal Computer Power FETPIN DESCRIPTIONV - +3 to +5 Volt InputCCGND - GroundIN1-IN4 - FET SourcesOUT1-OUT4 - FET DrainsGATE ..
DS1640S ,Personal Computer Power FETFEATURES PIN ASSIGNMENT Contains four P channel power FET switchesIN1 IN41 16that can each supply ..
DS1642 ,Nonvolatile Real Time Clocks RAMPIN DESCRIPTION PIN NAME FUNCTION 1 A7 2 A6 3 A5 4 A4 5 A3 6 A2 Address Input 7 A1 8 A0 19 A10 22 A ..
DS1642-100 ,Nonvolatile Timekeeping RAMPIN DESCRIPTION§ Lithium energy source is electricallyA0-A10 - Address Inputdisconnected to retain ..
DS1642-100+ ,Nonvolatile Timekeeping RAMPIN DESCRIPTION PIN NAME FUNCTION 1 A7 2 A6 3 A5 4 A4 5 A3 6 A2 Address Input 7 A1 8 A0 19 A10 22 A ..
DS1643 ,Nonvolatile Timekeeping RAMFEATURES PIN CONFIGURATIONS Integrated NV SRAM, Real-Time Clock, VN.C. 1 28 CCCrystal, Power-Fail ..
DTTI5516AUA ,DTTI5516 SINGLE MODULE DEMODULATOR AND DECODER IC FOR DIGITAL VIDEO SET-TOP BOXES Data Briefing®DTTi5516Single module demodulator and decoder ICfor digital video set-top boxesDATA BRIEFDescripti ..
DTV110 ,CRT HORIZONTAL DEFLECTION HIGH VOLTAGE DAMPER DIODEFEATURES AND BENEFITSHIGH BREAKDOWN VOLTAGE CAPABILITYISOWATT220ACTO-220ACVERY FAST RECOVERY DIODED ..
DTV110F ,CRT HORIZONTAL DEFLECTION HIGH VOLTAGE DAMPER DIODEFEATURES AND BENEFITSHIGH BREAKDOWN VOLTAGE CAPABILITYISOWATT220ACTO-220ACVERY FAST RECOVERY DIODED ..
DTV1500 ,CRT HORIZONTAL DEFLECTION HIGH VOLTAGE DAMPER DIODEABSOLUTE MAXIMUM RATINGSSymbol Parameter Value UnitV Repetitive peak reverse voltage 1500 VRRMI RMS ..
DTV1500H ,HIGH VOLTAGE DAMPER DIODE (CRT HORIZONTAL DEFLECTION)ABSOLUTE MAXIMUM RATINGSSymbol Parameter Value UnitV Repetitive peak reverse voltage 1500 VRRMI RMS ..
DTV1500HD ,HIGH VOLTAGE DAMPER DIODE (CRT HORIZONTAL DEFLECTION)ABSOLUTE MAXIMUM RATINGSSymbol Parameter Value UnitV Repetitive peak reverse voltage 1500 VRRMI RMS ..
DS1640S
Personal Computer Power FET
FEATURESContains four P channel power FET switches
that can each supply over 300 mA @ 0.2 volts
dropControlled directly from CMOS or TTL level
signalsFast switching time of less than 10 μs at rated
supply current16-pin DIP or 16-pin SOIC surface mount
packagePositive logic signal turns each FET on and
ground or low level signal turns each FET offOff condition allows less than 50 nA of
current flowLow control gate capacitance of less than 5FET gates can either follow inputs or be
latchedDesigned for use with power supplies ranging
from +3 to +5 volts
PIN ASSIGNMENT
PIN DESCRIPTIONVCC - +3 to +5 Volt Input
GND - Ground
IN1-IN4 - FET Sources
OUT1-OUT4 - FET Drains
GATE1-GATE4 - FET Control Gates
NC - No Connection
LATCH - Gate Inputs Latch Control
DESCRIPTIONThe DS1640 contains four P channel power MOS FETs designed as switches to conserve power in
personal computer systems. When connected to power management control units, power consuming
devices like disk drives or display panel backlights can be routinely shut down to conserve battery or
main power supply energy. The P channel power MOS FETs are individually controlled and are capable
of handling 300 mA each continuously with less than 0.2 volts drop from input to output. The device
requires a +3 Û +5 volt power supply input which is used to power internal logic and to operate a gate
bias generator.
DS1640/DS1640C
Personal Computer Power FET
www.dalsemi.comIN1
16-Pin DIP (300-mil)
See Mech. Drawings Section
OUT1
GND
GATE2
IN2
IN4
GATE4
OUT4
VCC
OUT3
GATE3
IN3
GATE1
LATCH
OUT2
IN1
16-Pin DIP SOIC (300-mil)
See Mech. Drawings Section
OUT1
GND
GATE2
IN2
IN4
GATE4
OUT4
VCC
OUT3
GATE3
IN3
GATE1
LATCH
OUT2
DS1640/DS1640C
OPERATIONWith +3 Û +5 volts applied between the VCC pin and ground, any one of four inputs can be connected or
disconnected from its respective output based on the bias applied to the control gate (see Figure 1). A set
of four internal latches is controlled by the latch input. The logic levels passed to the FET gates are
controlled by the gate inputs and latch pin status. When the latch pin is logic 0, the gate input levels are
inverted and passed directly to the control gates, enabling the switches to be switched both independently
and asynchronously. With a transition from logic 0 to logic 1 on the latch pin, the input levels present on
the gate inputs are locked by the four internal latches, maintaining the corresponding FET gates at those
levels. As long as the latch input is maintained at logic 1, the FET gate levels are maintained. When the
latch input is returned to logic 0, the gate inputs again are inverted and passed to the FET control gates
without being latched. A TTL or CMOS logic 1 turns a switch completely on and TTL or CMOS logic 0
turns a switch completely off. The four switches can be operated independently or two or more can be
connected in parallel for added current carrying capability. The four switches contained within the
DS1640 are not designed to be operated in a linear manner. When VCC is not applied to the DS1640 or if
VCC is not within nominal limits, the output levels and current carrying capability of the four switches are
not guaranteed. When all four gate inputs are off (logic 0) the device enters a low VCC current standby
mode because the onboard charge pump is turned off. The gate and latch inputs are CMOS-compatible
throughout the entire VCC range and are TTL-compatible when VCC falls between 4.5 and 5.5V.
DS1640 BLOCK DIAGRAM Figure 1
DS1640/DS1640C
ABSOLUTE MAXIMUM RATINGS*Voltage on Any Pin Relative to Ground -0.3V to +7.0V
Operating Temperature 0°C to 70°C
Storage Temperature -55°C to +125°C
Soldering Temperature 260°C for 10 seconds
* This is a stress rating only and functional operation of the device at these or any other conditions above
those indicated in the operation sections of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods of time may affect reliability.
DC OPERATING CONDITIONS(0°C to 70°C)
PARAMETERSYMBOLMINTYPMAXUNITSNOTESSupply VoltageVCC3.05.5V1, 2
Logic 0 Input 3.0 V < VCC <
4.5 V
VIL2-0.3+0.5V
Logic 0 Input 4.5 V < VCC <
5.0 V
VIL1-0.3+0.8V1
Logic 1 Input 3.0 V < VCC <
5.0 V
VIH2.0VCC +0.5V1, 7
Source VoltageVSOURCEVCC +0.5V1, 7
DC ELECTRICAL CHARACTERISTICS(0°C to 70°C; VCC = +5V + 10%)
PARAMETERSYMBOLMINTYPMAXUNITSNOTESSupply CurrentICC10.31mA3
Supply CurrentICC20.11μA4
Switch Off LeakageISL100nA
Switch On ResistanceRON0.30.67Ω
Switch Current @ VF = 200300mA5
Input LeakageIIL-1+1μA6
Gate Input CapacitanceCG5pF7
DC ELECTRICAL CHARACTERISTICS(0°C to 70°C; VCC = +5V + 10%)
PARAMETERSYMBOLMINTYPMAXUNITSNOTESSwitching Time (OFF → ON)tSTON10μs
Switching Time (ON → OFF)tSTOFF10μs
Minimum Time to Engage
Latch
tLM50ns
DS1640/DS1640C
NOTES:1. All voltages are referenced to ground.
2. When VCC is below minimum limits output levels are not guaranteed.
3. ICC1 is the supply current with one or more switches on.
4. ICC2 is when all switches are off and all inputs are within 0.5V of a supply rail.
5. Each switch is capable of carrying 300 mA maximum at 200 mV forward drop.
6. Input leakage applies to the four gate inputs and the latch input only.
7. Applies to each of four gate inputs and the latch input.
Dallas Semiconductor devices are built to the highest quality standards and manufactured for long term
reliability. All DS1640 devices are made using the same quality materials and manufacturing methods.
However, consumer versions of the DS1640 are not exposed to environmental stresses that some
commercial device manufacturing flows require. Devices that are designated as consumer product have a
“C” designator in the product number. For example, the DS1640C is a consumer grade product.
This datasheet has been :
www.ic-phoenix.com
Datasheets for electronic components.
