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PS394 Datasheet(PDF) 2 Page - Pericom Semiconductor Corporation

Part No. PS394
Description  Precision, Quad, SPDT, 17V Analog Switch
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Maker  PERICOM [Pericom Semiconductor Corporation]
Homepage  http://www.pericom.com
Logo PERICOM - Pericom Semiconductor Corporation

PS394 Datasheet(HTML) 2 Page - Pericom Semiconductor Corporation

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PS394
Precision, Quad, SPDT, 17VAnalog Switch
2
PS8444
01/13/00
Note1:
Signals on NC, NO, COM, or IN exceeding V+ or V– are clamped
by internal diodes. Limit forward diode current to maximum
current rating.
CAUTION
Stresses beyond those listed under “Absolute Maximum Ratings”
may cause permanent damage to the device. This is a stress only
rating and operation of the device at these or any other conditions
beyond those indicated in the operational sections of this specifi-
cation is not implied.
AbsoluteMaximumRatings
Voltages Referenced to GND
V+ ....................................................................–0.3Vto+17V
V– ....................................................................+0.3Vto–17V
V+toV– ..........................................................–0.3Vto+17V
COM_, NO_, NC_, IN_(1) ....................... (V––2V)to(V++2V)
or 30mA, whichever occurs first
Continuous Current, Any Pin ...................................... 30mA
Peak Current, Any Pin
(pulsed at 1ms, 10% duty cycle max.) ..................... 100mA
Continuous power Dissipation (TA = +70°C)
PlasticDIP(derate10.53mW/°Cabove+70°C) ..... 842mW
Narrow SO (derate 8.70mW/°C above +70°C) ...... 696mW
Operating Temperature Ranges
PS394C_P ...................................................... 0°Cto+70°C
PS394E_P .................................................. –40°Cto+85°C
Storage Temperature Range .......................–65°Cto+150°C
Lead Temperature (soldering, 10sec) .........................+300°C
ApplicationsInformation
OperationwithSupplyVoltagesOtherthan±5V
The PS394 switch operates with ±2.7V to ±8V bipolar supplies and
a+2.7Vto+15Vsinglesupply.Ineithercase,analogsignalsranging
from V+ to V- can be switched. The Typical Operating Character-
istics graphs show the typical on-resistance variation with analog
signal and supply voltage. The usual on-resistance temperature
coefficient is 0.5%/°C (typ).
Power-SupplySequencingandOvervoltageProtection
Do not exceed the absolute maximum ratings, because stresses
beyond the listed ratings may cause permanent damage to the
device. Proper power-supply sequencing is recommended for all
CMOS devices. Always apply V+, followed by V- (when using split
supplies) before applying analog signals or logic inputs, especially
if the analog or logic signals are not current-limited. If this sequenc-
ing is not possible and if the analog or logic inputs are not current
limited to less than 30mA, add a single diode (D1) for single-supply
operation(Figure1).Ifusingdualsuppliesoriftheanalogsignalcan
dip below ground in single-supply operation, add two small signal
diodes (D1, D2), as shown in Figure 1. Adding protection diodes
reduces the analog signal range to a diode drop above V- for D2.
Leakage is not affected by adding the diodes. On-resistance
increases by a small amount at low supply voltages. Maximum
supply voltage (V- to V+) must not exceed 17V.
Adding diodes D1 and D2 also protects against some overvoltage
situations. With the circuit of Figure 1, if the supply voltage is below
the absolute maximum rating and if a fault voltage up to the absolute
maximum rating is applied to an analog signal pin, no damage will
result.Forexample,with±5Vsupplies,analogsignalsupto±8.5Vwill
not damage the circuit of Figure 1. If only a single fault signal is
present, the fault voltage can go to +12V or -12V without damage.
+5V
+5V
D1
D1
V+
V–
COM
NO or NC
*
*
*
*
*Internal Protection Diodes
Figure1.OvervoltageProtectionusingBlockingDiodes


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