MAX4929E 查看數據表（PDF） - Maxim Integrated
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MAX4929E Datasheet PDF : 13 Pages
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HDMI 2:1 Low-Frequency Translating Switch
Table 1. Inputs Selection for 2:1 Mux
Truth Table
INPUTS
SEL HIZ1 HIZ2
0
0
1
0
1
0
1
0
1
1
1
0
X
0
0
X
1
1
SWITCH CONNECTIONS
SDAO to SDA1, SCLO to SCL1
SDAO to SDA1, SCLO to SCL1
SDAO to SDA2, SCLO to SCL2
SDAO to SDA2, SCLO to SCL2
High Impedance
High Impedance
Table 4. Mode of Operation
INPUTS
HIZ1 HIZ2
0
0
0
1
1
0
1
1
OUTPUTS
MODE OF OPERATION
High Impedance: SDAO, SDA1, SDA2,
SCLO, SCL1, SCL2, HPDO1, HPDO2, HPIRO
Normal Operation
Normal Operation
High Impedance: SDAO, SDA1, SDA2,
SCLO, SCL1, SCL2, HPDO1, HPDO2, HPIRO
Table 2. HPD Output Channel Selection
INPUTS
OUTPUTS
SEL HPD HIZ1 HIZ2 HPDO1
HPDO2
X
0
0
1
0
0
1
0
0
1
0
1
1
0
1
0
1
1
0
1
1
0
0
1
X
X
1
1
High
High
Impedance Impedance
X
X
0
0
High
High
Impedance Impedance
Table 3. HPIRO Output Channel Selection
INPUTS
SEL HPIR1 HPIR2 HIZ1
X
0
0
0
1
X
1
1
0
1
0
0
X
0
1
0
1
X
0
1
1
X
0
0
1
1
X
1
0
1
X
X
X
0
X
X
X
1
HIZ2
1
0
1
0
1
0
1
0
1
0
1
0
0
1
OUTPUT
HPIRO
0
1
0
1
0
1
High
Impedance
High
Impedance
RC
1MΩ
RD
1500Ω
CHARGE-CURRENT-
LIMIT RESISTOR
DISCHARGE
RESISTANCE
HIGH-
VOLTAGE
DC
SOURCE
Cs
100pF
STORAGE
CAPACITOR
DEVICE
UNDER
TEST
Figure 4. Human Body ESD Test Model
Logic Outputs
The HPDO_ signals are 5V TTL-compatible, per HDMI/
DVI specifications. HPIRO is VL compatible.
ESD Protection
As with all Maxim devices, ESD-protection structures
are incorporated on all pins to protect against ESD
encountered during handling and assembly.
Additionally, the MAX4929E is protected to ±6kV (HBM)
on SCL1, SCL2, SDA1, SDA2, HPDO1, HPDO2, HPIR1,
and HPIR2 by the HBM.
Human Body Model
Several ESD testing standards exist for measuring the
robustness against ESD events. The ESD protection of
the MAX4929E is characterized with the HBM method.
Figure 4 shows the model used to simulate an ESD event
resulting from contact with the human body. The model
consists of a 100pF storage capacitor that is charged to a
high voltage, then discharged through a 1.5kΩ resistor.
Figure 5 shows the current waveform when the storage
capacitor is discharged into a lower impedance.
ESD Test Conditions
ESD performance depends on a variety of conditions.
Contact Maxim for a reliability report documenting test
setup, methodology, and results.
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