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MAX4744, MAX4744H, MAX4745, MAX4745H, MAX4746H
Low-Voltage, Dual SPDT, Audio Clickless Switches with Negative Rail Capability
Negative Signal Handling and Audio Clickless/Popless Features in a Small, 10-Pin µDFN Package (2mm x 2mm)
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Status
Active: In Production.
Description
The MAX4744/MAX4744H/MAX4745/MAX4745H/MAX4746H dual SPDT (single-pole/double-throw) audio
switches feature negative signal capability that allows
signals as low as VCC - 5.5V to pass through without
distortion. These analog switches have a low on-resistance
and low supply current, and operate from a single
+1.8V to +5.5V supply.
The MAX4744/MAX4744H have internal shunt resistors
that automatically discharge the capacitance at the normally
open (NO) and normally closed (NC) terminals
when they are not connected. The MAX4746H features
internal shunt resistors on NC_ terminals. This reduces
click-and-pop sounds that occur when switching audio
signals between precharged points. A break-before-make
feature further reduces popping. The MAX4744/MAX4745 control the switches with two control bits CB1 and CB2. The MAX4744H/MAX4745H/MAX4746H have
one control bit to switch both switches and an enable
input active-low EN to put the switches in a high-impedance mode.
The MAX4744H/MAX4745H/MAX4746H also have an
internal protection network against voltages applied to
COM_ when VCC = 0V.
These devices are available in a space-saving 10-pin
µDFN (2mm x 2mm) package and operate over the
-40°C to +85°C extended temperature range.
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Data Sheet
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Key Features
- Distortion-Free Negative Signal Throughput Down to VCC - 5.5V
- Internal Shunt Resistor Reduces Click/Pop (MAX4744/MAX4744H)
- 0.6Ω (typ) Low On-Resistance
- 0.1Ω (max) Channel-to-Channel Matching
- 0.55Ω (max) On-Resistance Flatness
- +1.8V to +5.5V Single-Supply Voltage
- 0.01% (typ) Total Harmonic Distortion
- -75dB (typ) Crosstalk (100kHz)
- -68dB (typ) Off-Isolation (100kHz)
- Available in 10-Pin µDFN Package (2mm x 2mm)
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Applications/Uses
- Cellular Phones
- MP3 Players
- Notebook Computers
- PDAs and Other Handheld Devices
- Power Routing
- Speaker Switching
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Key Specifications:
| Switches and Multiplexers (Low Voltage) |
| Part Number |
Config. |
Channels |
VSUPPLY (Single)
(V) |
VSUPPLY (Single)
(V) |
VSIGNAL
(V) |
VSIGNAL
(V) |
Dynamic Range (max)
(V) |
RON
(Ω) |
RFLAT(ON) |
BW
(MHz) |
tON
(ns) |
tOFF
(ns) |
QINJECTION
(pC) |
CON
(pF) |
COFF
(pF) |
Budgetary Price |
| min |
max |
min |
max |
max |
max |
typ |
min |
max |
max |
max |
See Notes |
| MAX4744 |
SPDT |
2 |
1.8 |
5.5 |
-3.7 |
5.5 |
5.5 |
0.95 |
0.55 |
25 |
560 |
540 |
550 |
300 |
90 |
$1.55 @1k |
| MAX4744H |
DPDT |
1 |
-3.7 |
5.5 |
5.5 |
0.55 |
$1.55 @1k |
| MAX4745 |
SPDT |
2 |
-3.7 |
5.5 |
5.5 |
0.55 |
$1.55 @1k |
| MAX4745H |
DPDT |
1 |
-3.7 |
5.5 |
5.5 |
0.55 |
$1.55 @1k |
| MAX4746H |
DPDT |
1 |
- |
- |
- |
- |
$1.55 @1k |
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See All Switches and Multiplexers (Low Voltage) (186)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
 Typical Operating Circuit
More Information
Didn't Find What You Need?
Information Index
Document Ref.: 19-0563
Rev 1;
2007-02-13
This page last modified: 2011-12-12
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