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MAX4745ELB+T

P1-P3P4-P6P7-P9P10-P12
General 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 V
CC
- 5.5V to pass through without
distortion. These analog switches have a low on-resis-
tance 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 nor-
mally 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 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 V
CC
= 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.
Applications
Speaker Switching
Power Routing
Cellular Phones
MP3 Players
PDAs and Other Handheld Devices
Notebook Computers
Features
Distortion-Free Negative Signal Throughput Down
to V
CC
- 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)
MAX4744/MAX4744H/MAX4745/MAX4745H/MAX4746H
Low-Voltage, Dual SPDT, Audio Clickless
Switches with Negative Rail Capability
________________________________________________________________
Maxim Integrated Products
1
19-0563; Rev 1; 11/06
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
123
10 9 8
45
76
COM1 V
CC
COM2NC1
CB1 CB2GNDNO1
MAX4744
MAX4745
μDFN
(2mm x 2mm)
TOP VIEW
NC2
NO2
123
10 9 8
45
76
COM1 V
CC
COM2NC1
EN CB0GNDNO1
MAX4744H
MAX4745H
MAX4746H
μDFN
(2mm x 2mm)
NC2
NO2
+
+
Pin Configurations
Ordering Information/Selector Guide
PART
PIN-
PACKAGE
TOP
MARK
CLICKLESS COM PROTECTION PKG CODE
MAX4744ELB+T 10 µDFN-10 +AAF Yes No L1022-1
MAX4744HELB+T 10 µDFN-10 +AAG Yes Yes L1022-1
MAX4745ELB+T 10 µDFN-10 +AAH No No L1022-1
MAX4745HELB+T 10 µDFN-10 +AAI No Yes L1022-1
MAX4746HELB+T 10 µDFN-10 +AAM Yes, on NC_ Yes L1022-1
Note: All devices are specified over the -40°C to +85°C operating temperature range.
+
Denotes a lead-free package.
MAX4744/MAX4744H/MAX4745/MAX4745H/MAX4746H
Low-Voltage, Dual SPDT, Audio Clickless
Switches with Negative Rail Capability
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
(All voltages referenced to GND.)
V
CC
, CB_, EN ........................................................-0.3V to +6.0V
NC_, NO_ ...........................................(V
CC
- 6V) to (V
CC
+ 0.3V)
COM_ (MAX4744/MAX4745).............(V
CC
- 6V) to (V
CC
+ 0.3V)
COM_ (MAX4744H/MAX4745H/MAX4746H) ..................(Note 1)
Continuous Current NO_, NC_, COM_. ..........................±300mA
Peak Current NO_, NC_, COM_ (pulsed at 1ms, 50%
duty cycle) ...................................................................±400mA
Peak Current NO_, NC_, COM_ (pulsed at 1ms, 10%
duty cycle) ...................................................................±500mA
ESD Protection per Method 3015.7
NO_, NC_, COM_, V
CC
, GND, CB_, EN...............................±2kV
Continuous Power Dissipation (T
A
= +70°C)
10-Pin µDFN (derate 5mW/°C above +70°C) ...............403mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
ELECTRICAL CHARACTERISTICS
(V
CC
= +2.7V to +5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= 3.3V, T
A
= +25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
POWER SUPPLY
Supply-Voltage Range V
CC
1.8 5.5 V
V
CC
= 5.5V, V
CB
_ = 0V or V
CC
0.3 1
V
CC
= 5.5V, V
CB
_ = 0.5V or 1.4V 8
Supply Current I
CC
V
CC
= 2.7V, V
CB
_ = 0.5V or 1.4V 4
µA
ANALOG SWITCH
Analog Signal Range
V
NC
_,
V
NO
_,
V
COM
_
(Note 3)
V
CC
- 5.5V
V
CC
V
T
A
= +25°C 0.6 0.95
On-Resistance (Note 4) R
ON
V
CC
= +2.7V; V
NC_
or V
NO
_
= V
CC
- 5.5V, -1V, 0V, 1V,
2V, V
CC
; I
COM_
= 100mA
T
A
= T
MIN
to
T
MAX
1.0
Ω
T
A
= +25°C 0.1
On-Resistance Match Between
Channels (Notes 4 and 5)
ΔR
ON
V
C C
= 2.7V , V
N C
_ or V
N O
_ =
0V , I
C OM _
= 100m A
T
A
= T
MIN
to
T
MAX
0.1
Ω
T
A
= +25°C 0.55
On-Resistance Flatness (Note 6) R
FLAT
V
C C
= + 2.7V , V
N C
_ or V
N O
_ =
V
C C
- 5.5V , - 1V , 0V , 1V , 2V ,
V
C C
; I
C OM _
= 100m A
T
A
= T
MIN
to
T
MAX
0.6
Ω
Shunt Switch Resistance R
SH
MAX4744/MAX4744H/MAX4746H only,
V
CC
= 2.7V
25kΩ
T
A
= +25°C -15 +15
NC_, NO_ Off-Leakage Current
(Note 3)
I
NO_(OFF),
I
NC_
(
OFF
)
V
C C
= + 2.7V sw i tch op en;
V
N C _
or V
N O
_ = - 2.5V , + 2.5V
( M AX 4745/M AX 4745H onl y)
( M AX 4746H - I
N O_
(
OFF
) onl y)
T
A
= T
MIN
to
T
MAX
-50 +50
nA
T
A
= +25°C -15 +15
COM_ On-Leakage Current
(Note 3)
I
COM_
(
ON
)
V
C C
= 2.7V sw i tch cl osed ;
V
N C _
or V
N O
_ = - 2.5V , + 2.5V ;
V
C OM
_ = - 2.5V , + 2.5V
T
A
= T
MIN
to
T
MAX
-100 +100
nA
Note 1: If V
CC
> 0.5V, limits are (V
CC
- 6V) to (V
CC
+ 0.3V). If V
CC
< 0.5V, limits are (V
CC
- 6.0V) to +6.0V.
MAX4744/MAX4744H/MAX4745/MAX4745H/MAX4746H
Low-Voltage, Dual SPDT, Audio Clickless
Switches with Negative Rail Capability
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +2.7V to +5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= 3.3V, T
A
= +25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
T
A
= +25°C 30
COM_ Leakage Under Protection
Conditions
I
L
(
PROT
)
V
CC
= 0V; V
COM
_ = +5.5V;
V
NC
_ and V
NO
_ are
unconnected or connected to
GND; V
CB
_ = 0V
(MAX4744H/MAX4745H/
MAX4746H only)
T
A
= T
MIN
to
T
MAX
500
nA
DYNAMIC CHARACTERISTICS
For N O_, V
N O_
= 1.5V ,
V
C B_
= 0V to V
C C
55
Turn-On Time t
ON
V
C C
= 2.7V ,
R
L
= 32Ω ,
C
L
= 35p F, Fi g ur e 2
For N C _, V
N C _
= 1.5V ,
V
C B_
= V
C C
to 0V
560
ns
For N O_, V
N O_
= 1.5V ,
V
C B_
= V
C C
to 0V
540
Turn-Off Time t
OFF
V
CC
= 2.7V, R
L
=
32Ω, C
L
= 35pF,
Figure 2
For N C _, V
N C _
= 1.5V ,
V
C B_
= 0V to V
C C
36
ns
Break-Before-Make Delay Time t
D
V
CC
= 2.7V, V
NC
_ = V
NO_
= 1.5V; for NO_,
V
CB
_ = V
CC
to 0V; for NC_, V
CB
_ = 0V to
V
CC
; R
L
= 32Ω; C
L
= 35pF; Figure 3
20 ns
Power-Supply Rejection Ratio PSRR
f = 100kHz, V
COM
_ = 1V
RMS
, R
L
= 50Ω,
C
L
= 5pF
52 dB
Charge Injection Q V
GEN
_ = 0V; R
GEN
= 0Ω, C
L
= 1nF, Figure 4 450 pC
Off-Isolation V
ISO
C
L
= 5pF; R
L
= 50Ω; f = 100kHz;
V
COM
_ = 1V
RMS
; Figure 5 (Note 7)
-68 dB
Crosstalk V
CT
C
L
= 5pF; R
L
= 50Ω;
f = 100kHz; V
COM
_ = 1V
RMS
; Figure 5
-75 dB
Total Harmonic Distortion THD
f = 20Hz to 20kHz, V
COM_
= 0.5V
P-P
,
R
L
= 50Ω
0.01 %
NO_, NC_ Off-Capacitance
C
NO_(OFF),
C
NC_
(
OFF
)
f = 1MHz, Figure 6 90 pF
COM On-Capacitance C
COM_
(
ON
)
f = 1MHz, Figure 6 300 pF
P1-P3P4-P6P7-P9P10-P12

MAX4745ELB+T

Mfr. #:
Buy MAX4745ELB+T
Manufacturer:
Maxim Integrated
Description:
Analog Switch ICs Dual SPDT Audio Clickless Switch
Lifecycle:
New from this manufacturer.
Delivery:
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