MAX4890ETJ+ Maxim Integrated Products, MAX4890ETJ+ Datasheet - Page 7

• Manufacturer Part Number: MAX4890ETJ+
• Description: IC ETHERNET SWITCH OCTAL 32TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX4890ETJ+

• Function: Ethernet Switch
• Circuit: 8 x 2:1
• On-state Resistance: 5.5 Ohm
• Voltage Supply Source: Single Supply
• Voltage - Supply, Single/dual (±): 3 V ~ 3.6 V
• Current - Supply: 280µA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-WFQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The MAX4890E/MAX4892E provide a single digital con-
trol SEL. SEL controls the switches as well as the LED
switches as shown in Table 1.
The on-resistance of the MAX4890E/MAX4892E is very
low and stable as the analog input signals are swept
from ground to V+ (see the Typical Operating
Characteristics). The switches are bidirectional, allow-
ing A_ and _B_ to be configured as either inputs or out-
puts.
The MAX4890E/MAX4892E are characterized using the
Human Body Model for ±15kV of ESD protection. Figure 5
shows the Human Body Model. This model consists of a
100pF capacitor charged to the ESD voltage of interest
which is then discharged into the test device through a
1.5kΩ resistor. All signal and control pins are ESD pro-
tected to ±15kV HBM (Human Body Model).
Table 1. Truth Table
1000 Base-T, ±15kV ESD Protection LAN Switches
SEL
0
1
_______________________________________________________________________________________
A_ to _B1, LED_ to _LED1
A_ to _B2, LED_ to _LED2
CONNECTION
Digital Control Inputs
Analog Signal Levels
ESD Protection
The Typical Operating Circuit shows the MAX4890E/
MAX4892E in a 1000 Base-T docking station application.
Caution: Do not exceed the absolute maximum ratings.
Stresses beyond the listed ratings may cause perma-
nent damage to the device.
Proper power-supply sequencing is recommended for
all CMOS devices. Always apply V+ before applying
analog signals, especially if the analog signal is not
current limited.
High-speed switches require proper layout and design
procedures for optimum performance. Keep design-con-
trolled-impedance pc board traces as short as possible.
Ensure that bypass capacitors are as close as possible
to the device. Use large ground planes where possible.
PROCESS: BiCMOS
Applications Information
Power-Supply Sequencing and
Typical Operating Circuit
Overvoltage Protection
Chip Information
Layout
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