PS395 Ver la hoja de datos (PDF) - Pericom Semiconductor
Número de pieza
componentes Descripción
fabricante
PS395 Datasheet PDF : 13 Pages
| |||
PS395
Precision 8-Ch. 17V, SPST Switch
123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123w456/878-9B01i2t3S45e67r8i9a0l12D34e5c67o8d90e1d21C234o5n67t8r9o01l2
CS
SCLK
SWITCHES
UPDATED
DIN
DOUT
D7 D6 D5 D4 D3 D2 D1 D0
DATA BITS
D0 D7 D6 D5 D4 D3 D2 D1 D0
DATA BITS FROM PREVIOUS DATA INPUT
Figure 7. Three-Wire Interface Timing
Addressable Serial Interface
When several serial devices are configured as slaves, addressable
by the processor, DIN pins of each decode logic individually con-
trol CS of each slave device. When a slave is selected, its CS pin is
driven low, data is shifted in, and CS is driven high to latch the
data. Typically, only on slave is addressed at a time. DOUT is not
used.
Applications Information
Multiplexers
The PS395 can be used as a multiplexer.
Single Supply
The PS395 operates from a single supply between +3V and +16V
when V- is connected to GND. All of the bipolar precautions must
be observed.
High-Frequency Performance
In 50Ω systems, signal response is reasonably flat up to 50MHz
(see Typical Operating Characteristics). Above 20MHz, the on-
response has several minor peaks that are highly layout depen-
dent. The problem is not turning the switch on, but turning it
off. The off-state switch acts like a capacitor and passes higher
frequencies with less attenuation. At 10MHz, off isolation is about
-45dB in 50Ω systems, becoming worse (approximately 20dB per
decade) as frequency increases. Higher circuit impedances also
make off isolation worse. Adjacent channel attenuation is about
3dB above that of a bare IC socket, and is due entirely to capaci-
tive coupling.
Part
PS395CNB
PS395CWG
PS395ENG
PS395EWG
Temperature Range
Pin-Package
0°C to +70°C
24 Narrow Plastic Dip
0°C to +70°C
24 Wide SO
40°C to +850°C 24 Narrow Plastic Dip
40°C to +850°C 24 Wide SO
Pericom Semiconductor Corporation
2380 Bering Drive San Jose, CA 95131 1-800-435-2336 Fax (408) 435-1100 http://www.pericom.com
13
PS8462 02/22/00
Share Link: 