19-3972; Rev 0; 2/06
Triple Video Switch
General Description
The MAX4887 triple, high-frequency switch is intended
for notebooks and monitors to permit RGB signals to be
switched from one driver to one of two loads (1:2) or one
of two sources to be connected to one load (2:1). The
MAX4887 high-performance switch utilizes n-channel
architecture with internal high-drive pullup from a low-
noise charge pump, resulting in very low on-capacitance.
The MAX4887 features 5Ω (typ) on-resistance switches
with 10pF on-capacitances for routing RGB video sig-
nals. A logic input enables or disables the internal
charge pump for optimal frequency performances when
operating at lower input voltages resulting in standby
supply current less than 3µA. All RGB inputs/outputs are
ESD protected to ±8kV Human Body Model (HBM) and
feature a global input (EN) that places all inputs and out-
puts in a high-impedance state.
The MAX4887 is available in a small 3mm x 3mm, 16-
pin TQFN package for ease of assembly and
flowthrough layout, resulting in minimum space require-
ment and simplicity in board layout. The MAX4887
operates over the -40°C to +85°C temperature range.
♦
+3V/+5V Single-Supply Operation
♦
Low R
ON
5Ω (V+ = 5V)
♦
Low 10pF (typ) C
ON
♦
Global ENABLE Input to Turn On/Off Switches
♦
Break-Before-Make Switching
♦
±8kV HBM ESD Protection per IEC1000-4-2 on I/Os
♦
Less than 1mA Supply Current (Charge Pump
Enabled)
♦
Less than 3µA Standby Mode
♦
Charge-Pump Noise Lower than 163µV
P-P
♦
Flowthrough Layout for Easy Board Layout
♦
Space-Saving Lead-Free (3mm x 3mm) 16-Pin
TQFN Package
Features
MAX4887
Applications
Notebook Computers
Servers and Routers
Docking Stations
PC/HDTV Monitors
PART
MAX4887ETE
Ordering Information
TEMP
RANGE
-40°C to
+85°C
PIN-
PACKAGE
16 TQFN-EP*
3mm x 3mm
TOP
MARK
AEF
PKG
CODE
T1633-4
*EP
= Exposed paddle.
The MAX4887 is available only in a lead-free package. Specify
lead-free by adding the + symbol at the end of the part num-
ber when ordering.
Typical Operating Circuit
+3.3V
+5V
75Ω
V
CC
R0
G0
B0
75Ω
75Ω
V+
0.1µF
VGA
D/A
CONVERTER
MAX4887
R1
G1
B1
VGA
CONNECTOR 1
FROM CONTROL
SIGNALS
SEL
EN
QP
GND
R2
G2
B2
DOCKING
STATION
VGA
CONNECTOR 2
________________________________________________________________
Maxim Integrated Products
1
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.
Triple Video Switch
MAX4887
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.)
V+ .............................................................................-0.3V to +6V
R_, G_, B_, SEL,
QP, EN
(Note 1) ................-0.3V to (V+ + 0.3V)
Continuous Current through Any Switch ........................±120mA
Peak Current through Any Switch
(pulsed at 1ms, 10% duty cycle).................................±240mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin Thin QFN-EP (derate 15.6mW/°C above
+70°C).........................................................................1250mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1:
Signals exceeding V+ 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.
DC ELECTRICAL CHARACTERISTICS—5V SUPPLY
(V+ = 5V,
QP
= GND, T
A
= T
MIN
to T
MAX
. Typical values are at T
A
= +25°C, unless otherwise noted.) (Note 2)
PARAMETER
Power-Supply Voltage Range
Quiescent Supply Current
RGB SWITCHES
On-Resistance
On-Resistance Matching
R
ON
∆R
ON
V
IN
= +1.5V,
I
IN
= -25mA
0.3V < V
IN
< +2V,
I
IN
= -25mA (Note 3)
0 < V
IN
< +2V,
I
IN
= -25mA
0 < V
IN
< +1.5V, I
IN
=
-25mA
QP
= GND
QP
= V+
QP
= GND
QP
= V+
QP
= GND
QP
= V+
QP
=V+
-1
300
0.8
0.8
2.0
2.0
-1
Human Body Model, R_, G_, B_
Human Body Model, SEL,
EN, QP
±8
±2
+1
5
6
0.5
0.7
0.5
0.7
0.7
6.5
7.5
1.3
1.5
1
1.8
1.55
+1
µA
pA
Ω
Ω
Ω
I
+
V+ = +5.5V
QP
= GND
QP
= V+
SYMBOL
CONDITIONS
MIN
4.5
0.5
1
TYP
MAX
5.5
1
3
UNITS
V
mA
µA
On-Resistance Flatness
R
FLAT(ON)
On-Leakage Current
Off-Leakage Current
LOGIC INPUTS (SEL,
EN, QP)
Input Low Voltage
Input High Voltage
Input Leakage Current
ESD PROTECTION
ESD Protection
I
L(ON)
I
L(OFF)
R_, G_, B_ = 0.7V, 4.8V;
EN
= GND
R_, G_, B_ = 0.7V, 4.8V;
EN
= GND
V+ = 4.5V
V+ = 5.5V
V+ = 4.5V
V+ = 5.5V
V
IL
V
IH
I
LEAK
V
V
µA
kV
2
_______________________________________________________________________________________
Triple Video Switch
AC ELECTRICAL CHARACTERISTICS—5V SUPPLY
(V+ = +5V,
QP
= GND, T
A
= T
MIN
to T
MAX
. Typical values are at T
A
= +25°C, unless otherwise noted.) (Note 2)
PARAMETER
Charge-Pump Noise
Turn-On Time
Charge Injection
Propagation Delay
Output Skew Between Ports
3dB Bandwidth
Off-Isolation
Insertion Loss
Crosstalk
Off-Capacitance
On-Capacitance
I
LOS
V
CT
C
OFF
C
ON
t
PLH
/t
PHL
t
SKEW
f
MAX
SYMBOL
V
QP
t
ON
R
S
= R
L
= 50Ω
V
IN
= +4.5V, R
L
= 100Ω, Figure 2
V
GEN
= 0V, R
GEN
= 0Ω, C
L
= 1.0nF, Figure 3
C
L
= 10pF, R
S
= R
L
= 50Ω, Figure 4 (Note 3)
Skew between any two ports: R, G, B;
Figure 4 (Note 3)
R
S
= R
L
= 50Ω, Figure 6
R
S
= R
L
= 50Ω, V
IN
_ = 1V
P-P,
f = 50MHz,
Figure 5
1MHz < f < 50MHz,
R
S
= R
L
= 50Ω
QP
= GND
QP
= V+
500
-58
0.5
0.5
-40
6
10
28
400
350
CONDITIONS
MIN
TYP
163
20
MAX
UNITS
µV
P-P
µs
pC
ps
ps
MHz
dB
dB
dB
pF
pF
MAX4887
f < 50MHz, V
IN
= 1V
P-P
, R
S
= R
L
= 50Ω,
Figure 5
f = 1MHz, (R,G,B)
0
to (R,G,B)
1,2
f = 1MHz
ELECTRICAL CHARACTERISTICS—3.3V SUPPLY
(V+ = +3.3V,
QP
= GND, T
A
= T
MIN
to T
MAX
. Typical values are at T
A
= +25°C, unless otherwise noted.) (Note 2)
PARAMETER
Power-Supply Voltage Range
Quiescent Supply Current
RGB SWITCHES
On-Resistance
On-Resistance Matching
On-Resistance Flatness
On-Leakage Current
Off-Leakage Current
LOGIC INPUTS (SEL,
EN, QP)
Input Low Voltage
Input High Voltage
Input Leakage Current
ESD PROTECTION
ESD Protection
Human Body Model, R_, G_, B_
Human Body Model, SEL,
EN, QP
±8
±2
kV
V
IL
V
IH
I
LEAK
V+ = 3.0V
V+ = 3.6V
V+ = 3.0V
V+ = 3.6V
2.0
2.0
-1
+1
0.8
0.8
V
V
µA
R
ON
∆R
ON
R
FLAT(ON)
I
L(ON)
I
L(OFF)
V = +3V, V
IN
= +1.5V, I
IN
= -25mA
0 < V
IN
< +2V, I
IN
= -25mA (Note 3)
0< V
IN
< +2V, I
IN
= -25mA
R_, G_, B_ = 0V or +3.6V,
EN
= GND
R_, G_, B_ = 0V or +3.6V,
EN
= V+
-1
200
6
0.8
0.9
7
1.2
1.4
+1
Ω
Ω
Ω
µA
pA
I
+
V+ = +3.6V
SYMBOL
CONDITIONS
MIN
3.0
0.5
TYP
MAX
3.6
1
UNITS
V
mA
_______________________________________________________________________________________
3
Triple Video Switch
MAX4887
AC ELECTRICAL CHARACTERISTICS—3.3V SUPPLY
(V+ = +3.3V,
QP
= GND, T
A
= T
MIN
to T
MAX
. Typical values are at T
A
= +25°C, unless otherwise noted.) (Note 2)
PARAMETER
Charge-Pump Noise
Turn-On Time
Charge Injection
Propagation Delay
Output Skew Between Ports
3dB Bandwidth
Insertion Loss
Crosstalk
Off-Isolation
Off-Capacitance
On-Capacitance
C
OFF
C
ON
t
PHL
/t
PLH
t
SKEW
f
MAX
I
LOS
V
CT
SYMBOL
V
QP
t
ON
R
S
= R
L
= 50Ω
V
IN
= +3V, R
L
= 100Ω , Figure 2
V
GEN
= 0V, R
GEN
= 0Ω, C
L
= 1.0nF,
Figure 3
C
L
= 10pF, R
S
= R
L
= 50Ω, Figure 4 (Note 3)
Skew between any two ports: R, G, B,
Figure 5 (Note 3)
R
S
= R
L
= 50Ω, Figure 5
1MHz < f < 50MHz, R
S
= R
L
= 50Ω
f < 50MHz, R
S
= R
L
= 50Ω, Figure 5
R
S
= R
L
= 50Ω, V
IN
_ = 1V
P-P
, f = 50MHz,
Figure 5
f = 1MHz, (R,G,B)
0
to (R,G,B)
1,2
f = 1MHz
500
0.6
-40
-55
6
10
21
400
350
CONDITIONS
MIN
TYP
100
25
MAX
UNITS
µV
P-P
µs
pC
ps
ps
MHz
dB
dB
dB
pF
pF
Note 2:
Maximum and minimum limits over temperature are guaranteed by design and characterization. Device is production tested
at T
A
= +85°C.
Note 3:
Guaranteed by design.
4
_______________________________________________________________________________________
Triple Video Switch
MAX4887
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
ON-RESISTANCE vs. V+
MAX4887 toc01
ON-RESISTANCE vs. V
RGB
MAX4887 toc02
ON-RESISTANCE vs. V+
QP = LOW
4.9
4.8
ON-RESISTANCE (Ω)
4.7
4.6
4.5
4.4
4.3
4.2
4.1
4.0
V+ = 5.5V
V+ = 4.5V
V+ = 5V
MAX4887 toc03
5.0
4.9
4.8
ON-RESISTANCE (Ω)
4.7
4.6
4.5
4.4
4.3
4.2
4.1
4.0
0
0.6
1.2
1.8
V
RGB
(V)
2.4
3.0
V+ = 3V
V+ = 3.6V
V+ = 3.3V
QP = LOW
10
9
8
ON-RESISTANCE (Ω)
7
6
5
4
3
2
1
0
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
V+ = 3.3V
QP = LOW
5.0
3.6
0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0 3.3
V
RGB
(V)
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
V
RGB
(V)
ON-RESISTANCE vs. V
RGB
MAX4887 toc04
ON-RESISTANCE vs. V+
MAX4887 toc05
ON-RESISTANCE vs. V
RGB
35
ON-RESISTANCE (Ω)
30
25
20
15
10
5
0
T
A
= -40°C
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
V
RGB
(V)
T
A
= +25°C
T
A
= +85°C
MAX4887 toc06
10
9
8
ON-RESISTANCE (Ω)
7
6
5
4
3
2
1
0
0
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
60
54
48
ON-RESISTANCE (Ω)
42
36
30
24
18
12
6
0
QP = HIGH
V+ = 4.5V
V+ = 5V
V+ = 5.5V
40
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
V
RGB
(V)
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
V
RGB
(V)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX4887 toc07
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX4887 toc08
RGB ON/OFF-LEAKAGE CURRENT
vs. TEMPERATURE
V+ = 5V
MAX4887 toc09
700
650
600
SUPPLY CURRENT (nA)
550
500
450
400
350
300
250
200
3.0
3.5
4.0
V+ (V)
4.5
5.0
QP = HIGH
500
QP = LOW
450
SUPPLY CURRENT (µA)
400
350
300
250
200
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
1000
100
LEAKAGE CURRENT (nA)
10
ON-LEAKAGE
1
0.1
0.01
OFF-LEAKAGE
0.001
3.0
3.5
4.0
V+ (V)
4.5
5.0
5.5
-40
-15
10
35
60
85
TEMPERATURE (°C)
5.5
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5
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