| Part
Number |
Configuration |
Channel |
Vsupply(V) |
Ron(ohm) |
¦¤Ron(ohm) |
RFALT(ohm) |
tON(ns) |
tOFF(ns) |
tBBM(ns) |
Il(off)(uA) |
BW(MHz)
|
QINJ(pC)
|
CON(pF) |
COFF(pF) |
VISO(dB)
|
VCT(dB)
|
Features
|
ESD(kV)
|
ROHS
|
Package
|
| Min |
Max |
Typ |
Max |
Max |
Max |
Max |
Max |
Max |
Max |
Max |
UM3157  |
2:1 Multiplexers |
1 |
1.65 |
5.5 |
10 |
0.5 |
125 |
24 |
13 |
0.5 |
1 |
250 |
7 |
18.5 |
6.5 |
57 |
54 |
- |
2 |
Available |
SC70-6 |
UM3257 |
SPDT |
2 |
1.65 |
5.5 |
10 |
0.5 |
110 |
32 |
28 |
0.5 |
1 |
250 |
7 |
18.5 |
6.5 |
55 |
54 |
Lower Icc |
2 |
Available |
DFN12 |
| UM3258 |
SPDT |
2 |
1.65 |
5.5 |
10 |
0.5 |
110 |
32 |
28 |
0.5 |
1 |
300 |
7 |
18.5 |
6..5 |
55 |
54 |
Lower Icc |
2 |
Available |
DFN12 |
UM4684 |
SPDT |
2 |
1.8 |
5.5 |
0.5 |
0.05 |
0.15 |
90 |
78 |
6 |
0.02 |
- |
21 |
406 |
145 |
69 |
69 |
- |
2 |
Available |
CSP-10 |
UM4717 |
SPDT |
2 |
1.8 |
5.5 |
4.5 |
0.4 |
1.5 |
100 |
50 |
8 |
0.001 |
300 |
5 |
15 |
9 |
80 |
110 |
1.8V Logic Compatible |
- |
Available |
CSP-10 |
UM3699 |
DPDT |
2 |
1.65 |
5.5 |
0.75 |
0.06 |
0.15 |
60 |
40 |
15 |
0.01 |
70 |
50 |
230 |
72 |
62 |
62 |
Internal Shutdown Resistors |
4 |
Available |
QFN-16 |
Analog Switches and Multiplexers |
| Union offer the industry's
wide selection of low-on-resistance, high performance analog switches
and multiplexers, Products are available for general-purpose use and
specific applications. |
| UM4684-UM4684 is low
on-resistance, low voltage, dual SPDT analog switch operate from
a single +1.8V to +5.5V supply. The UM4684 features a 0.5 ohmRON
for its NC switch and 0.8 ohm RON for its NO switch at
a +2.7V supply, has break-before-make switching action (2ns) with
tON = 50 ns and tOFF = 40ns at +3V. The digital
logic inputs are 1.8V logic-compatible with a +2.7V to +3.3V supply,
it is available in 4X3 bumps Wafer level Flip Chip package. |
| UM3157- UM3157 is a 10ohm,
low voltage, SPDT analog switch operating from a single +1.65V to
+5.5V supply. It features very low propagation delay and on-resistance
match of 0.2ohm at 3.0V while maintaining CMOS low power dissipation.
The switch conducts signals within power rails equally well in both
directions when on, and blocks up to the power supply level when off.
It offers break-before-make switching action (0.5ns) with tON
= 14ns and tOFF = 7.5ns at +2.7V, 1.2 ns (max) differential
skew and 250MHz -3dB bandwidth, with less than 20pF on-channel capacitance.
It is available in a 2.1mmx 1.25mm SC70-6 package. |
| UM3257- UM3257 is a 10ohm,
low voltage, dual SPDT analog switch operating from a single +1.65V
to +5.5V supply. It features very low propagation delay and on-resistance
match of 0.2ohm at 3.0V while maintaining CMOS low power dissipation.
The switch conducts signals within power rails equally well in both
directions when on, and blocks up to the power supply level when off.
It offers break-before-make switching action (0.5ns) with tON
= 14ns and tOFF = 15ns at +2.7V, 1.2 ns (max) differential
skew and 250MHz -3dB bandwidth, with less than 20pF on-channel capacitance.
It is available in a 3.0mmx 1.6mm DFN12 package. |
| UM3258- UM3258 is a 10ohm,
low voltage, dual SPDT analog switch operating from a single +1.65V
to +5.5V supply. It features very low propagation delay and on-resistance
match of 0.2ohm at 3.0V while maintaining CMOS low power dissipation.
The switch conducts signals within power rails equally well in both
directions when on, and blocks up to the power supply level when off.
It offers break-before-make switching action (0.5ns) with tON
= 14ns and tOFF = 15ns at +2.7V, 1.2 ns (max) differential
skew and 300MHz -3dB bandwidth, with less than 20pF on-channel capacitance.
It is available in a 3.0mmx 1.0mm DFN12 package. |
| UM4717- UM4717 is a low-voltage,
low on-resistance, dual SPDT analog switch operating from a single
+1.8V to +5.5V supply. It is designed for USB 1.1/2.0 and audio switching
applications. The UM4717 features two 4.5¦¸ RON (max) SPDT
switches with 1.2¦¸ flatness and 0.3¦¸ matching between channels. It
offers break-before-make switching (1ns) with tON <
80ns and tOFF < 40ns at +2.7V, and 300MHz -3dB bandwidth,
with less than 15pF on-channel capacitance. The digital logic inputs
are 1.8V logic-compatible with a +2.7V to +3.6V supply. It is available
in 4x3 bumps Wafer level Flip Chip package. |
| UM3699- The UM3699/UM3699A
are dual independent ultra low RON DPDT analog switchs. These devices
are designed for low operating voltage, high current switching of
speaker output for cell phone applications. They can switch a balanced
stereo output and can handle a balanced microphone/speaker/ring?tone
generator in a monophone mode. The UM3699 has a 3.8K¦¸ internal shunt
resistors that automatically discharge the capacitance at the normally
open (NO) and normally closed (NC) terminals when they are not connected.
This reduces click-and-pop noises that occur when switching audio
signals between precharged points. The UM3699A has no internal shunt
resistors, which make it compatible for switching data lines that
keep a specific voltage when the NO or NC terminals are not connected,
avoiding power loss on the shunt resistors. Both devices have a break-before-make
feature that further reduces popping. |
Frequent
Q&A Regarding Analog Switch |
Should an analog
switch be selected primarily based on On Resistance (Ron)?
No. On resistance is very important but each application is unique
and the trade-off between Ron and Con needs to be fully understood.
Low Ron (1 ohm or less) devices will have greater on-capacitance so
for capacitive sensitive, high frequency or high speed data rate applications
the low Con is the more critical parameter. |
What is Ron Flatness
for an Analog Switch?
Ron (flatness) is a measure of the ˇ°peakˇ± and ˇ°valleyˇ± of the composite
analog switch Ron. If this parameter is large then the composite,
Ron can cause variable attenuation, which is particularly bad for
audio applications. The UM-family of switches are specifically designed
to minimize this variable attenuation. A low Ron (flatness) also results
in excellent THD characteristics (Total Harmonic Distortion).
|
Can an analog
switch pass a digital signal?
Yes, an analog switch can pass a digital signal. Since the analog
switch is an NMOS/PMOS transmission gate there is also no voltage
translation or clamping action so the preferred choice may be the
analog switch over a digital switch. |
| Featured
Application Notes |
|
Selecting the right CMOS Analog Switch |
|
Port Multiplexing using Analog Switch in Portable Equipment |
|
Signal Modulating & Demodulating Using Analog Switch |
| Low
Resistance Analog Switch permit speaker switching in audio devices
|
| Low
Icct Analog Switches for Ultra Portable Designs |
| Applications |
| Cellular Handsets |
| Computers: Notebook |
| Network Hubs, Switches
and Routers |
| PDAs and handheld Equipment
|
PRODUCTS 