19-0860; Rev 0; 10/07
HDMI 2:1 Low-Frequency Translating Switch
General Description
The MAX4929E low-frequency 2:1 switch is ideal for
HDMI™/DVI™ switching applications. The device fea-
tures a voltage clamp function to protect low-voltage
systems at the output. The MAX4929E operates with a
single 5V supply or dual or triple supplies. The
MAX4929E provides clamping and voltage translation
without additional components. All external inputs/out-
puts are electrostatic-discharge (ESD)-protected to
±6kV Human Body Model (HBM).
The MAX4929E is available in 20-pin QSOP and 20-pin,
4mm x 4mm, TQFN packages. The device is specified
for the extended -40°C to +85°C operating temperature
range.
♦
DDC Switches
Low 20pF (typ) Capacitance
♦
Protects EDID (Extended Display Identification
Data) EPROM or MCU from Excess Voltage
♦
Hot-Plug Detect Signal
Translates MCU Voltage to TTL Levels
♦
Two Devices Can Be Used to Form a 4:1 Switch
No Added Active Components Needed
♦
±6kV ESD Protection HBM on All External I/Os
♦
Available in Lead-Free, 20-Pin TQFN or 20-Pin QSOP
Packages
Features
MAX4929E
Applications
HD Television Receivers
HD Monitors
High-Resolution Computer Monitors
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
20 QSOP
20 TQFN-EP*
PKG
CODE
E20-1
T2044-3
MAX4929EEEP+ -40°C to +85°C
HDMI is a trademark of HDMI Licensing, LLC.
DVI is a trademark of Digital Display Working Group (DDWG).
MAX4929EETP+ -40°C to +85°C
+Denotes
a lead-free package
*EP
= Exposed paddle.
Typical Operating Circuit
+5V
+3.3V TO +5V
Pin Configurations
SDAO
12
HIZ2
HDMI1
TMDS1
V+
CLP
2kΩ
2kΩ
V
DD
SCLO
SDAO
EXESD
0.1μF
EXESD 18
HPDO2 19
15
HIZ1 16
GND 17
14
HPD
0.1μF
13
HPIR1
SCL1
SDA1
HPDO1
TMDS1
SCLO
11
10
9
SEL
VL
CLP
V+
SCL1
0.1μF
TOP VIEW
EDID
EPROM
HPIRO
MAX4929E
*EP
8
7
6
MAX4929E
HPIR2
SCL2
SDA2
HPDO2
HIZ2
HIZ1
HPIR2 20
1
2
3
4
5
HDMI2
HPIR1
SCL2
+2V to +3.3V
SEL HPIRO HPD V
DD
MCU
0.1μF
TQFN
(4mm x 4mm)
*EXPOSED PADDLE CONNECTED TO GND OR LEAVE EP UNCONNECTED
Pin Configurations continued at end of data sheet.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
HPDO1
SDA2
SDA1
GND SEL HPIRO HPD VL
HDMI 2:1 Low-Frequency Translating Switch
MAX4929E
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND, unless otherwise noted.)
V+ ............................................................................-0.3V to +6V
All Pins (except GND) .............................................-0.3V to +6V
Continuous Current into Any I/O Terminal .........................25mA
Continuous Power Dissipation (T
A
= +70°C)
20-Pin QSOP (derate 9.1mW/°C above +70°C) ..........727mW
20-Pin TQFN (derate 16.9mW/°C above +70°C) ......1356mW
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
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
(V+ = +5V ±10%, CLP = VL = +3.3V ±10%, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
POWER SUPPLY
V+ Supply Current
V+ Supply Current
VL Supply Current
CLP Supply Current
ANALOG SWITCH
On-Resistance
On-Resistance Match Between
Channels
On-Resistance Flatness
Off-Leakage Current
On-Leakage Current
Output Clamped Voltage
R
ON(SCL_),
R
ON(SDA_)
ΔR
ON
R
FLAT
I
SCL_(OFF),
I
SDA_(OFF)
I
SCL_(ON),
I
SDA_(ON)
V+ = 4.5V, CLP = 3V, V
SCL_
or V
SDA_
= 0 to
1.5V; I
SCL_
or I
SDA_
= ±10mA
V+ = 4.5V, CLP = 3V, V
SCL_
or V
SDA_
= 0 to
1.5V; I
SCL_
or I
SDA_
= ±10mA
V+ = 4.5V, CLP = 3V, V
SCL_
or V
SDA_
= 0 to
1.5V; I
SCL_
or I
SDA_
= ±10mA
V+ = 5.5V, V
SCL_
or V
SDA_
= 0V, 5.5V;
HIZ1 = HIZ2 = 0V or VL (Note 1)
V+ = 5.5V, V
SCL_
or V
SDA_
= 0V, 5.5V
(Note 1)
-5
-5
3.3
10
2
25
8
13
+5
+5
Ω
Ω
Ω
µA
µA
V
I+
I+
I
VL
I
CLP
V+ = 5.5V, VL = CLP = 3.6V
V+ = 0V, VL = CLP = 0V, V
HPIR_
= +5.5V
V+ = 5.5V, VL = CLP = 3.6V
V+ = 5.5V, VL = CLP = 3.6V
3
8
200
1
1
µA
µA
µA
µA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V
OVC(SCLO),
V+ = 5V, CLP = 3.3V, VL = 5V, R
P
= 1kΩ
V
OVC(SDAO)
(Note 2)
C
SCL_(OFF),
V+ = 5V, T
A
= +25°C, Figure 1
C
SDA_(OFF)
C
SCL_(ON),
C
SDA_(ON)
BW
V
CT
V
ISO
V
IL
V
IH
I
INL
V+ = 5V, T
A
= +25°C, Figure 1
R
S
= R
L
= 50Ω, C
L
= 10pF
R
S
= R
L
= 50Ω, f = 1MHz, Figure 2 (Note 3)
R
S
= R
L
= 50Ω, f = 1MHz, Figure 2 (Note 4)
V+ = 4.5V
V+ = 5.5V
3.8
SWITCH DYNAMIC CHARACTERISTICS
SCL_, SDA_ Off-Capacitance
SCL_, SDA_ On-Capacitance
Bandwidth
Crosstalk
Off-Isolation
LOGIC INPUT (HPIR1, HPIR2)
Input Logic-Low Voltage
Input Logic-High Voltage
Input Logic Leakage
0.8
0.01
1
V
V
µA
20
30
40
-75
-70
pF
pF
MHz
dB
dB
2
_______________________________________________________________________________________
HDMI 2:1 Low-Frequency Translating Switch
ELECTRICAL CHARACTERISTICS (continued)
(V+ = +5V ±10%, CLP = VL = +3.3V ±10%, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
Input Logic-Low Voltage
Input Logic-High Voltage
Hysteresis
Input Logic-Leakage Current
HPDO_ Output Logic-Low Voltage
HPDO_ Output Logic-High Voltage
HPIRO Output Logic-Low Voltage
HPIRO Output Logic-High Voltage
Output-Logic Leakage Current
TIMING CHARACTERISTICS
t
PD(HPDO_)
Logic Delay
t
PD(HPIRO)
ESD PROTECTION
ESD Protection, Human Body
Model
EXESD Leakage Current
HPIR1, HPIR2, HPDO1, HPDO2, SCL1,
SCL2, SDA1, SDA2 (Note 5)
HPIRO, HPD, SEL, SCLO, SDAO, HIZ1,
HIZ2 (Note 6)
±6
kV
±2
1.0
µA
V+ = 4.5V, VL = CLP = 3.0V, C
L
= 15pF,
SEL = 0V or VL (Figure 3)
33
V+ = 4.5V, VL = CLP = 3.0V, C
L
= 15pF,
SEL = 0V or VL (Figure 3)
33
ns
SYMBOL
V
IL
V
IH
V
HYST
I
INL
V
OL(HPDO_)
V+ = 4.5V, VL = CLP = 3.0V, I
SINK
= 4mA
V
OH(HPDO_)
V+ = 4.5V, VL = CLP = 3.0V, I
SOURCE
= 4mA
V
OL(HPIRO)
I
O
V+ = 4.5V, VL = CLP = 3.0V, I
SINK
= 2mA
2.5
1
HIZ1 = HIZ2 = 0V or VL
V
OH(HPIRO)
V+ = 4.5V, VL = CLP = 3.0V, I
SOURCE
= 2mA
4.0
0.5
CONDITIONS
V+ = 4.5V, VL = CLP = 3V
V+ = 5.5V, VL = CLP = 3.6V
3V
≤
VL = CLP
≤
3.6V
2.0
150
0.01
1
0.5
MIN
TYP
MAX
0.8
UNITS
V
V
mV
µA
V
V
V
V
µA
LOGIC INPUT (SEL, HPD, HIZ1, HIZ2)
MAX4929E
LOGIC OUTPUT (HPDO1, HPDO2, HPIRO)
Note 1:
Leakage measured at SCLO or SDAO with SCL_ and SDA_ open.
Note 2:
Pullup resistor of R
P
= 1kΩ at SCLO and SDAO. These resistors are necessary for the clamp/translation to operate correctly.
Note 3:
Crosstalk is measured between any two analog inputs, crosstalk = 20log(V
OUT
/ V
IN
).
Note 4:
Off-isolation = 20log10 (V
SCLO
/ V
SCL_
), V
SCLO
= output, V
SCL_
= input to off switch.
Note 5:
Referenced to GND.
Note 6:
Any combination of pin to any other pin.
_______________________________________________________________________________________
3
HDMI 2:1 Low-Frequency Translating Switch
MAX4929E
Test Circuits/Timing Diagrams
0.1μF
+5V
+3.3V
V+
SDAO/SCLO
MAX4929E
VL
0.1μF
CLP
SEL
CAPACITANCE
METER
f = 1MHz
SDA_/
SCL_
GND
HIZ1
HIZ2
V
IL
OR V
IH
VL
Figure 1. Channel Off-/On-Capacitance
0.1μF
+3.3V +5V 0.1μF
NETWORK
ANALYZER
V
OFF-ISOLATION = 20log
OUT
V
IN
50Ω
V
ON-LOSS = 20log
OUT
V
IN
V
CROSSTALK = 20log
OUT
V
IN
0V OR VL
SEL
CLP VL V+
SDAO/
SCLO
MAX4929E
V
IN
50Ω
SDA1/
SCL1
50Ω
VL
HIZ1
HIZ2
SDA2/
SCL2*
GND
V
OUT
MEAS
REF
50Ω
50Ω
MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS.
OFF-ISOLATION IS MEASURED BETWEEN SDAO/SCLO AND "OFF" SDA_/SCL_ TERMINAL ON EACH SWITCH.
ON-LOSS IS MEASURED BETWEEN SDAO/SCLO AND "ON" SDA_/SCL_ TERMINAL ON EACH SWITCH.
CROSSTALK IS MEASURED FROM ONE CHANNEL TO THE OTHER CHANNEL.
SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
*FOR CROSSTALK THIS PIN IS SCL2.
SCL1 AND SCL0 ARE OPEN.
Figure 2. On-Loss, Off-Isolation, and Crosstalk
V+ or V
L
HPD
HPIR_
0V
50%
t r < 5ns
t f < 5ns
V
OUT
HPDO_
HPIRO 0V
0.9 x V
0UT
t
PD(HP DO)
t
PD(HP IRO)
Figure 3. Logic Delay Timing
4
_______________________________________________________________________________________
HDMI 2:1 Low-Frequency Translating Switch
Typical Operating Characteristics
(V+ = 5V, VL = 3.3V, CLP = 3.3V, T
A
= +25°C, unless otherwise noted.)
ON-RESISTANCE vs. V
SCLO
MAX4929E toc01
MAX4929E
ON-RESISTANCE vs. TEMPERATURE
V+ = 4V
MAX4929E toc02
12
10
V+ = 4V
ON-RESISTANCE (Ω)
8
6
V+ = 4.5V
4
2
0
0
0.5
V
SCLO
(V)
1.0
V+ = 5V
14
12
ON-RESISTANCE (Ω)
10
8
6
4
2
0
V+ = 4.5V
V+ = 5V
1.5
-40
-15
10
35
TEMPERATURE (°C)
60
85
SUPPLY CURRENT vs. TEMPERATURE
MAX4929E toc03
ON-LEAKAGE CURRENT
vs. TEMPERATURE
V+ = 5.5V
V
L
= CLP = 3.3V
MAX4929E toc04
1.0
40
ON-LEAKAGE CURRENT (nA)
0.8
SUPPLY CURRENT (μA)
30
0.6
20
0.4
10
0.2
0
-40
-15
10
35
TEMPERATURE (°C)
60
85
-40
-15
10
35
TEMPERATURE (°C)
60
85
0
OFF-LEAKAGE CURRENT
vs. TEMPERATURE
MAX4929E toc05
FREQUENCY RESPONSE
0
-20
ON-LOSS
ON-LOSS (dB)
-40
-60
-80
CROSSTALK
-100
-120
OFF-ISOLATION
MAX4929E toc06
40
V+ = 5.5V
V
L
= CLP = 3.3V
OFF-LEAKAGE CURRENT (nA)
30
20
20
10
0
-40
-15
10
35
TEMPERATURE (°C)
60
85
-140
0.1
1
10
FREQUENCY (MHz)
100
_______________________________________________________________________________________
5
模拟与混合信号
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
