Maxim MAX4948 Hex spdt data switch Datasheet

19-0673; Rev 1; 1/07
KIT
ATION
EVALU
E
L
B
AVAILA
Hex SPDT Data Switch
The MAX4947/MAX4948 analog switches operate from a
single +1.8V to +5.5V supply. These switches feature a
low 30pF (typ) capacitance for high-speed data switching applications.
The MAX4947 is a triple double-pole/double-throw (DPDT)
switch, and the MAX4748 is a hex single-pole/doublethrow (SPDT) switch with one control logic input. The
MAX4947 has three logic inputs to control the switches in
pairs. The MAX4948 has one logic input and an enable
input (EN) to disable the switches.
The MAX4947/MAX4948 are available in small 24-pin
(4mm x 4mm) TQFN and 25-bump (2.5mm x 2.5mm)
chip-scale packages (UCSP™).
Applications
USB Signal Switching
UART Signal Switching
Cell Phones
PDAs
SDIO/Memory Stick
Features
♦
♦
♦
♦
♦
♦
Multiplex SDIO or Memory Stick Interfaces
1.8V to 5.5V Supply Voltage Range
Low On-Resistance 4Ω (typ)
Low-Capacitance Switches, 30pF (typ)
Rail-to-Rail Signal Handling
Small 25-Bump UCSP™ (2.5mm x 2.5mm) and
24-TQFN (4mm x 4mm)
Ordering Information
PART
TEMP
RANGE
PINPACKAGE
PKG
CODE
MAX4947EBA+*
-40°C to +85°C
25 UCSP-25
B25-1
MAX4947ETG+
-40°C to +85°C
24 TQFN-EP
T2444-4
MAX4948EBA+*
-40°C to +85°C
25 UCSP-25
B25-1
MAX4948ETG+
-40°C to +85°C
24 TQFN-EP
T2444-4
* Future product—contact factory for availability.
+ Denotes lead-free package.
EP = Exposed paddle.
UCSP is a trademark of Maxim Integrated Products, Inc.
Typical Operating Circuit appears at end of data sheet.
Functional Diagram
VCC
VCC
CB12
CB
NO1
S1
COM1
NO1
S1
COM1
NC1
NC1
NO2
S2
COM2
NO2
S2
COM2
NC2
NC2
CB34
NO3
S3
COM3
NO3
S3
COM3
NC3
NC3
NO4
S4
COM4
NO4
S4
COM4
NC4
NC4
CB56
NO5
S5
COM5
NO5
S5
COM5
NC5
NC5
NO6
S6
COM6
NO6
S6
COM6
NC6
MAX4947
GND
NC6
EN
MAX4948
GND
________________________________________________________________ Maxim Integrated Products
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.
1
MAX4947/MAX4948
General Description
MAX4947/MAX4948
Hex SPDT Data Switch
ABSOLUTE MAXIMUM RATINGS
VCC to GND ...........................................................-0.3V to +6.0V
All other pins to GND (Note 1) ......................-0.3V to VCC + 0.3V
Continuous Current
NO_, NC_, COM_ .......................................................±100mA
Peak Current NO_, NC_, COM_
(pulsed at 1ms, 50% Duty Cycle)................................±200mA
(pulsed at 1ms, 10% Duty Cycle)................................±300mA
Continuous Power Dissipation (TA = +70°C)
25-Bump UCSP (derate 12.2mW/°C above +70°C) ....976mW
24-Pin TQFN (derate 20.8mW/°C above +70°C) .......1667mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ........................................................150°C
Storage Temperature Range .............................-65°C to +150°C
Bump Temperature (soldering)
Infrared (15s) ...............................................................+220°C
Vapor Phase (60s) ...........................................................+215°C
Lead Temperature (soldering) .........................................+300°C
Note 1: Signals on CB_, NO_, NC_, COM_, EN exceeding VCC or GND are clamped by internal diodes. Limit forward-diode current
to maximum current rating.
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.
ELECTRICAL CHARACTERISTICS
(VCC = +2.7V to +5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = +3V, TA = +25°C.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
TA
MIN
TMIN to
TMAX
1.8
TYP
MAX
UNITS
5.5
V
POWER SUPPLY
Power-Supply Range
VCC
Power-Supply Current
ICC
VCC = 5.5V, VCB_ = 0V or VCC
VCC = 2.7V, VCB_ = 1.6V or 0.5V
VCC = 5.5V, VCB_ = 1.6V or 0.5V
1.0
TMIN to
TMAX
5
µA
10
ANALOG SWITCH
Analog Signal Range
VNO_, VNC_,
VCOM_,
TMIN to
TMAX
0
+25°C
On-Resistance (Note 4)
RON
VCC = 2.7V, ICOM_ = 10mA;
VNC_ or VNO_ = 0 or VCC
ΔRON
VCC = 2.7V, ICOM_ = 10mA;
VNO_ or VNC_ = 0 or VCC
RFLAT
VCC = 2.7V, ICOM_ = 10mA;
VNC_ or VNO_ = 0 or VCC
4.0
TMIN to
TMAX
0.3
TMIN to
TMAX
NO_ or NC_ Off-Leakage
Current
COM_ On-Leakage Current
2
INO_(OFF) or VCC = 3.6V; VCOM_ = 3.6V, 0;
INC_(OFF)
VNO_ or VNC_ = 0, 3.6V
INO_(ON)
VCC = 3.6V; VCOM_ = 3.6V, 0;
VNO_ or VNC_ = 3.6V, 0 or
unconnected
0.5
TMIN to
TMAX
Ω
1
1.2
+25°C
-3
+3
TMIN to
TMAX
-10
+10
+25°C
-6
+6
TMIN to
TMAX
-10
+10
_______________________________________________________________________________________
Ω
0.5
0.6
+25°C
On-Resistance Flatness
(Notes 4, 6)
V
5.5
6.5
+25°C
On-Resistance Match Between
Channels (Notes 4, 5)
VCC
Ω
nA
nA
Hex SPDT Data Switch
(VCC = +2.7V to +5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = +3V, TA = +25°C.) (Notes 2, 3)
PARAMETER
COM_ Off-Leakage Current
SYMBOL
ICOM_(OFF)
CONDITIONS
VCC = 3.6V (MAX4948);
VCOM_ = 3.3V, 0.3V;
VNO_ or VNC_ = 0, 3V, 3.3V
TA
MIN
+25°C
-6
TYP
MAX
+6
TMIN to
TMAX
-10
+10
UNITS
nA
DYNAMIC
tON
VCC = 2.7V; VNO_ or VNC_= 1.5V;
RL = 50Ω;
CL = 35pF, Figure 1
+25°C
Turn-On Time
tOFF
VCC = 2.7V; VNO_ or VNC_= 1.5V;
RL = 50Ω;
CL = 35pF, Figure 1
+25°C
Turn-Off Time
tBBM
VCC = 2.7V; VNO_ or VNC_= 1.5V;
RL = 50Ω; CL = 35pF, Figure 2
(Note 7)
+25°C
Break-Before-Make
400
TMIN to
TMAX
800
300
TMIN to
TMAX
TMIN to
TMAX
800
ns
800
800
ns
100
ns
2
HIGH-SPEED TIMING CHARACTERISTICS (rising time = 20ns)
Skew
tSKEW
VCC = 2.7V; RS = 39Ω; CL = 50pF,
Figure 3
TMIN to
TMAX
0.2
ns
VGEN = 0, RGEN = 0, CL = 1nF ,
Figure 4
+25°C
10
pC
Charge Injection
Q
-3dB Bandwidth
BW
Signal = 0dBm, CL = 5pF,
RL = 50Ω, Figure 5
+25°C
300
MHz
Off-Isolation
VISO
CL = 5pF; RL = 50Ω;
VCOM_ = 1VP-P, f = 1MHz,
Figure 5 (Note 8)
+25°C
-70
dB
Crosstalk
VCT
CL = 5pF; RL = 50Ω; f = 1MHz,
VCOM_ = 1VP-P, Figure 5 (Note 9)
+25°C
-90
dB
NC_ = NO_ = 0V, f = 1MHz
Figure 6
+25°C
15
pF
VCOM = GND, f = 1MHz
(MAX4948), Figure 6
+25°C
25
pF
COM_ = 0V, f = 1MHz, Figure 6
+25°C
30
pF
NC_ or NO_ Off-Capacitance
CNC_(OFF)
CNO_(OFF)
COM_ Off-Capacitance
CCOM_(OFF)
COM_ On-Capacitance
CCOM_(ON)
DIGITAL I/O (EN, CB_)
Input-Logic High
VIH
TMIN to
TMAX
Input-Logic Low
VIL
TMIN to
TMAX
0.5
V
Input Leakage Current
ICB
TMIN to
TMAX
1
µA
VCB_ = 0 or VCC
1.6
V
_______________________________________________________________________________________
3
MAX4947/MAX4948
ELECTRICAL CHARACTERISTICS (continued)
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +2.7V to +5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = +3V, TA = +25°C.) (Notes 2, 3)
Note 2: The algebraic convention is used. The most negative value is shown in the minimum column.
Note 3: UCSP parts are 100% tested at TA = +25°C. Limits across the full temperature range are guaranteed by correlation and
design. TQFN parts are guaranteed by correlation and design at - 40°C.
Note 4: RON and ΔRON matching specifications are guaranteed by design.
Note 5: ΔRON = RON(MAX) - RON(MIN).
Note 6: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the
specified analog signal ranges.
Note 7: Guaranteed by design, not production tested.
Note 8: Off-Isolation = 20log10 [VCOM_ / (VNO_ or VNC_)], VCOM_ = output, VNO_ or VNC_ = input to off switch.
Note 9: Between any two switches.
Typical Operating Characteristics
(VCC = 3V, TA = +25°C, unless otherwise noted.)
4
VCC = 2.3V
4
TA = -40°C
3
5
1
0
0
5
NO/NC OFF-LEAKAGE CURRENT
vs. TEMPERATURE
VCC = 3V/5V
1
0.1
VCC = 5V
0.01
VCC = 3V
0.001
0.0001
10
COM ON-LEAKAGE CURRENT (nA)
MAX4947/48 toc04
10
VCOM (V)
2
3
VCOM (V)
COM ON-LEAKAGE CURRENT
vs. TEMPERATURE
COM OFF-LEAKAGE CURRENT
vs. TEMPERATURE (MAX4748)
0.5
1.0
1.5
2.0
2.5
VCC = 3V/5V
1
0.1
0.01
VCC = 5V
VCC = 3V
0.001
0.0001
-40
-15
10
35
TEMPERATURE (°C)
60
85
0
3.0
1
4
10
VCC = 3V/5V
COM OFF-LEAKAGE CURRENT (nA)
4
MAX4947/48 toc05
2
3
VCOM (V)
TA = -40°C
1
VCC = 5.0V
0
1
2
2
0
0
3
5
MAX4947/48 toc06
VCC = 2.7V
VCC = 3.0V
TA = +25°C
TA = +85°C
15
10
4
VCC = 5V
RON (Ω)
RON (Ω)
20
TA = +25°C
5
VCC = 2.0V
25
TA = +85°C
6
5
MAX4947/48 toc03
VCC = 3V
MAX4947/48 toc02
VCC = 1.8V
30
ON-RESISTANCE (Ω)
7
MAX4947/48 toc01
40
35
ON-RESISTANCE
vs. VCOM AND TEMPERATURE
ON-RESISTANCE
vs. VCOM TEMPERATURE
ON-RESISTANCE vs. VCOM
NO/NC OFF-LEAKAGE CURRENT (nA)
MAX4947/MAX4948
Hex SPDT Data Switch
1
0.1
0.01
VCC = 5V
VCC = 3V
0.001
0.0001
-40
-15
10
35
TEMPERATURE (°C)
60
85
-40
-15
10
35
TEMPERATURE (°C)
_______________________________________________________________________________________
60
85
Hex SPDT Data Switch
V+ = 5V
V+ = 3V
10
5
0
0
1
2
3
VCOM (V)
4
5
5
-40
800
2.5
3.5
4.5
SUPPLY VOLTAGE (V)
600
500
tOFF
400
350
200
100
100
50
2.5
3.5
4.5
SUPPLY VOLTAGE (V)
5.5
-40
-60
10
35
TEMPERATURE (°C)
60
85
SUPPLY CURRENT vs. LOGIC VOLTAGE
VCC = 5.5V
6
SUPPLY CURRENT (μA)
RL = 600Ω
-15
7
MAX4947/48 toc14
1
THD+N (%)
-40
tON, V+ = 5V
tOFF, V+ = 5V
0
1.5
MAX4947/48 toc13
-20
-80
250
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
ON-LOSS
0
tOFF, V+ = 3V
150
tON
FREQUENCY RESPONSE
20
85
tON, V+ = 3V
400
200
5.5
60
TURN-ON/-OFF TIMES vs. TEMPERATURE
0
1.5
10
35
TEMPERATURE (°C)
300
300
0
-15
450
tON/tOFF (ns)
VIL
0.8
1
6
MAX4947/48 toc11
900
0.4
ON-LOSS (dB)
3
4
SUPPLY VOLTAGE (V)
1000
MAX4947/48 toc10
VIH
MAX4947/48 toc09
MAX4947/48 toc08
2
700
1.2
VCC = 3V
TURN-ON/-OFF TIME
vs. SUPPLY VOLTAGE
tON/tOFF (ns)
LOGIC THRESHOLD (V)
1.6
VCC = 5V
0.1
1
LOGIC THRESHOLD vs. SUPPLY VOLTAGE
2.0
10
MAX4947/48 toc12
SUPPLY CURRENT (nA)
CHARGE INJECTION (pC)
20
100
SUPPLY CURRENT (nA)
MAX4947/48 toc07
CL = 1nF
15
SUPPLY CURRENT vs. TEMPERATURE
SUPPLY CURRENT vs. SUPPLY VOLTAGE
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0.1
OFF-ISOLATION
-100
MAX4947/48 toc15
CHARGE INJECTION vs. VCOM
25
5
4
3
2
CROSSTALK
1
-120
-140
0.0001
0
0.01
0.01
1
FREQUENCY (MHz)
100
0.01
0.1
1
10
FREQUENCY (kHz)
100
0 0.5 1.0 1.6 2.0
3.0
4.0
LOGIC VOLTAGE (V)
5.0
_______________________________________________________________________________________
6.0
5
MAX4947/MAX4948
Operating Characteristics (continued)
(VCC = +3V, TA = +25°C, unless otherwise noted.)
Hex SPDT Data Switch
MAX4947/MAX4948
Pin Description
PIN
NAME
MAX4947
6
FUNCTION
MAX4948
TQFN
UCSP
TQFN
UCSP
1
D2
1
D2
2
D1
2
3
C1
3
4
C2
4
5
B1
6, 21
A1, C3,
D3
7
8
NC6
Analog Switch 6. Normally Closed Terminal 6.
D1
NO5
Analog Switch 5. Normally Open Terminal 5.
C1
COM5
C2
NC5
Analog Switch 5. Normally Closed Terminal 5.
—
—
CB56
Digital Control Input for Analog Switches 5 and 6
6, 21
A1, C3,
D3
GND
Ground
B2
7
B2
COM4
A2
8
A2
NO4
Analog Switch 4. Normally Open Terminal 4.
9
B3
9
B3
NC4
Analog Switch 4. Normally Closed Terminal 4.
10
A3
10
A3
NO3
Analog Switch 3. Normally Open Terminal 3.
11
A4
11
A4
COM3
12
B4
12
B4
NC3
Analog Switch 3. Normally Closed Terminal 3.
13
A5
—
—
CB34
Digital Control Input for Analog Switches 3 and 4
14
B5
—
—
CB12
Digital Control Input for Analog Switches 1 and 2
15
C4
15
C4
NC2
Analog Switch 2. Normally Closed Terminal 2.
16
C5
16
C5
COM2
17
D5
17
D5
NO2
18
D4
18
D4
NC1
Analog Switch 1. Normally Closed Terminal 1.
19
E5
19
E5
NO1
Analog Switch 1. Normally Open Terminal 1.
20
E4
20
E4
COM1
Analog Switch 1. Common Terminal 2.
Positive Supply Voltage
22
E3
22
E3
23
E2
23
E2
VCC
COM6
24
E1
24
E1
NO6
—
—
5
B1
EN
—
—
13
A5
N.C.
Analog Switch 5. Common Terminal 5.
Analog Switch 4. Common Terminal 4.
Analog Switch 3. Common Terminal 3.
Analog Switch 2. Common Terminal 2.
Analog Switch 2. Normally Open Terminal 2.
Analog Switch 6. Common Terminal 6.
Analog Switch 6. Normally Open Terminal 6.
Enable-Logic In. Drive EN high to set all switches into highimpedance mode.
No Connection. Leave N.C. unconnected.
—
—
14
B5
CB
Digital Control Input for Analog Switches 1–6. Drive CB low to
connect COM_ to NC_ for all six switches. Drive CB high to connect
COM_ to NO_ for all six switches. CB is valid only when EN is driven
low. If EN is driven high then all switches are high impedance.
EP
—
EP
—
EP
Exposed Pad. Connect exposed pad to ground.
_______________________________________________________________________________________
Hex SPDT Data Switch
NO4
NO3
COM3
CB34
A
NC3
COM5
NC5
NC2
GND
COM2
15
14
13
12
NC3
COM1 20
11
COM3
10
NO3
9
NC4
8
NO4
7
COM4
CB12
B
16
GND 21
C
MAX4947
VCC 22
NC1
GND
NO2
COM6 23
D
NO6
COM6
*EP
NO6 24
COM1
VCC
+
NO1
1
2
NC6
E
UCSP 2.5mm x 2.5mm
3
COM5
NC6
NO5
NO5
4
5
6
GND
NC4
17
CB56
COM4
18
NO1 19
NC5
CB56
CB34
5
CB12
4
NC2
3
COM2
+ GND
TOP VIEW
MAX4947
2
NO2
1
NC1
(BUMPS SIDE DOWN)
TQFN 4mm x 4mm
*EXPOSED PADDLE CONNECT TO GROUND
NO3
COM3
N.C.
NC3
CB
COM5
NC5
NC2
GND
COM2
16
15
14
13
NO1 19
12
NC3
COM1 20
11
COM3
10
NO3
9
NC4
8
NO4
7
COM4
GND 21
C
MAX4948
VCC 22
NC6
NC1
GND
NO2
COM6 23
D
NO6
COM6
*EP
NO6 24
COM1
VCC
+
NO1
1
NC6
E
UCSP 2.5mm x 2.5mm
2
NO5
NO5
3
4
5
6
GND
NC4
17
EN
COM4
18
NC5
EN
B
N.C.
NO4
A
CB
5
NC2
4
COM2
3
COM5
+ GND
TOP VIEW
MAX4948
2
NO2
1
NC1
(BUMPS SIDE DOWN)
TQFN 4mm x 4mm
*EXPOSED PADDLE-CONNECT TO GROUND
MAX4947
CB12
NO1/NO2 NC1/INC2
0
OFF
ON
1
CB34
0
1
ON
NO3/NO4
OFF
ON
OFF
NC3/NC4
ON
OFF
CB56
0
1
NO5/NO6
OFF
ON
NC5/NC6
ON
OFF
MAX4948
EN
LOW
CB
LOW
NO_
OFF
NC_
LOW
HIGH
HIGH
X
ON
OFF
OFF
OFF
ON
_______________________________________________________________________________________
7
MAX4947/MAX4948
Pin Configurations/Truth Tables
MAX4947/MAX4948
Hex SPDT Data Switch
Detailed Description
The MAX4947 triple DPDT and the MAX4948 hex SPDT
analog switches operate from a single +1.8V to
+5.5V supply. These devices are fully specified for +3V
applications.
The MAX4947/MAX4948 have a guaranteed 4Ω (typ) onresistance and a low 30pF (typ) capacitance that makes
the switch ideal for data switching applications. The
MAX4947 has three logic inputs to control two switches in
pairs and the MAX4948 has one logic control input and
an enable input (EN) to disable the switches.
Applications Information
Digital Control Inputs
The MAX4947/MAX4948 provide a digital control logic
input, CB_. CB_ controls the position of the switches as
shown in the Pin Configurations/Truth Tables. Driving
CB_ rail-to-rail minimizes power consumption.
The MAX4948 features an EN input to turn all switches
on or off. When EN is driven high, CB is disabled, and
the analog inputs enter a high-impedance state. Drive
EN low to turn the switches on and enable CB.
Analog Signal Levels
The on-resistance of the MAX4947/MAX4948 is very low
and stable as the analog input signals are swept
from ground to V CC (see the Typical Operating
Characteristics). These switches are bidirectional, allowing NO_, NC_, and COM_ to be configured as either
inputs or outputs.
Power-Supply Biasing
Power-supply bypassing improves noise margin and
prevents switching noise to propagate from VCC supply
to other components. A 0.1µF capacitor connected
from V+ to GND is adequate for most applications.
Power-Supply Sequencing
CMOS devices require proper power-supply sequencing.
Always apply VCC before the analog signals, especially
if the input signal is not current limited.
UCSP Applications Information
For the latest application details on UCSP construction,
dimensions, tape carrier information, printed circuit
board techniques, bump-pad layout, and recommended reflow temperature profile, as well as the latest information on reliability testing results, go to the Maxim
website at www.maxim-ic.com/ucsp for the Application
Note: UCSP-A Wafer-Level Chip-Scale Package.
Timing Circuits/Timing Diagrams
MAX4947/
MAX4948
VCC
VN_
LOGIC
INPUT
VCC
COM_
NO_
OR NC_
0V
RL
t OFF
CL
VOUT
GND
SWITCH
OUTPUT
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
RL
RL + RON
VOUT = VN_
50%
VOUT
CB_
LOGIC
INPUT
(
)
t r < 5ns
t f < 5ns
50%
VCC
0.9 x V0UT
t ON
IN DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
Figure 1. Switching Time
8
0.9 x VOUT
0V
_______________________________________________________________________________________
Hex SPDT Data Switch
VCC
MAX4947/
MAX4948
LOGIC
INPUT
VCC
VOUT
COM_
NO_
RL
CB_
LOGIC
INPUT
50%
0V
NC_
VN_
VCC
CL
GND
0.9 x VOUT
VOUT
tBBM
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
Figure 2. Break-Before-Make-Interval
tri
90%
50%
B+
A+
TxD+
Rs
INPUT A+
10%
tskew_i
CL
•
INPUT A-
90%
•
•
•
MAX4947/MAX4948
•
50%
10%
tfi
tro
•
•
A-
TxDRs
Rs = 39Ω
CL = 50pF
B-
OUTPUT B+
10%
90%
50%
tskew_o
CL
OUTPUT B-
90%
50%
10%
tfo
|tro - tri| DELAY DUE TO SWITCH FOR RISING INPUT AND RISING OUTPUT SIGNALS.
|tfo - tfi|
DELAY DUE TO SWITCH FOR FALLING INPUT AND FALLING OUTPUT SIGNALS.
|tskew_o| CHANGE IN SKEW THROUGH THE SWITCH FOR OUTPUT SIGNALS.
|tskew_i| CHANGE IN SKEW THROUGH THE SWITCH FOR INPUT SIGNALS.
Figure 3. Input/Output Skew Timing Diagram
_______________________________________________________________________________________
9
MAX4947/MAX4948
Timing Circuits/Timing Diagrams (continued)
MAX4947/MAX4948
Hex SPDT Data Switch
Timing Circuits/Timing Diagrams (continued)
V CC
MAX4947/
MAX4948
ΔVOUT
V CC
RGEN
VOUT
COM_
NC_
OR NO_
VOUT
CB_
OFF
CL
V GEN
GND
OFF
ON
CB_
VIL TO VIH
OFF
CB_
ON
OFF
Q = (ΔV OUT )(C L )
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
Figure 4. Charge Injection
+5V 10nF
V
OFF-ISOLATION = 20log ✕ OUT
VCB_.>
NETWORK
ANALYZER
0V OR V+
CB_
NC1
VCC
COM1
50Ω
ON-LOSS = 20log ✕
CROSSTALK = 20log ✕
MAX4947/
MAX4948
NO1*
50Ω
50Ω
VCB_
MEAS
VOUT
GND
REF
50Ω
*FOR CROSSTALK THIS PIN IS NO2.
NC2 AND COM2 ARE OPEN.
Figure 5. On-Loss, Off-Isolation, and Crosstalk
VCC
VCC
COM_
MAX4947/
MAX4948
CB_
CAPACITANCE
METER
f = 1MHz
VIL OR VIH
NC_ or
NO_
GND
Figure 6. On-Loss, Off-Isolation, and Crosstalk
10
VOUT
VCB_.>
50Ω
MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS.
OFF-ISOLATION IS MEASURED BETWEEN COM_ AND OFF NO_ OR NC_ TERMINAL ON EACH SWITCH.
ON-LOSS IS MEASURED BETWEEN COM_ AND ON NO_ OR NC_ TERMINAL ON EACH SWITCH.
CROSSTALK IS MEASURED FROM ONE CHANNEL TO THE OTHER CHANNEL.
SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
10nF
VOUT
VCB_.>
______________________________________________________________________________________
Hex SPDT Data Switch
VCC
CB
CLK
NO1
NC1
CMD
DAT1
SD
HOST
COM4
S4
NO5
NC5
DAT3
COM3
S3
NO4
NC4
DAT2
COM2
S2
NO3
NC3
SD I/O 1
COM1
S1
NO2
NC2
DAT0
EN
LOGIC
COM5
S5
NO6
NC6
COM6
S6
CLK
MAX4948
CMD
GND
DAT0
SD I/O 2
DAT1
DAT2
DAT3
Chip Information
PROCESS: CMOS
______________________________________________________________________________________
11
MAX4947/MAX4948
Typical Operating Circuit
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
25L, UCSP.EPS
MAX4947/MAX4948
Hex SPDT Data Switch
PACKAGE OUTLINE, 5x5 UCSP
21-0096
12
______________________________________________________________________________________
H
1
1
Hex SPDT Data Switch
24L QFN THIN.EPS
Revision History
Pages changed at Rev 1: 1.
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 13
© 2007 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
MAX4947/MAX4948
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
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