WHDG18101G Single Port DIP Gigabit Base-T PIN18 non-PoE LAN Transformer
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Indoor Gigabit data ports where the component temperature stays between 0 °C and +70 °C and a through-hole package is required.The WHDG18101G is an 18-pin DIP single-port 100/1000 BASE-TX transformer without PoE, so the port has to be powered locally.
A DIP package is usually chosen over surface-mount for mechanical retention under vibration or stress, or because the line already runs a wave-solder process. If the equipment must power up below 0 °C or work outdoors long term, this part does not apply. Other options are listed in the10/100/1000 BASE-T range.
No. The datasheet assigns no DC balance current capability to the centre taps of the WHDG18101G, so they cannot be used as a supply path.Termination values and the grounding approach should follow the reference design for the target PHY.
If the design needs power over the cable, move to a part that carries a PoE current rating rather than reworking the circuit around this one.
How insertion loss and return loss are specified: the WHDG18101G gives fixed limits, while theWHDG18110Ggives formulas.The WHDG18101G specifies -1.1 dB max insertion loss from 1 to 100 MHz and return loss as fixed values at five frequency points; the other expresses insertion loss as a function of frequency and, above 40.1 MHz, return loss as a formula too.
OCL, DCR, turns ratio, crosstalk, common-mode rejection, isolation and temperature range are identical on both. The difference matters in a link budget: a fixed limit can be read directly, whereas a formula has to be evaluated at your actual frequency. Both ship 30 pcs per tube.
