SPDT switch in a 6-ball BGA — what the 15 Ohm Ron means for your signal path
The SN74LVC1G3157YEPR is a single-pole double-throw (SPDT) analog switch from TI's 74LVC logic family, packaged in a 6-ball DSBGA (6-XFBGA) that occupies roughly 1.5 mm² of board area. Its 15 Ohm max on-state resistance sets the insertion loss for the signal passing through the switch — at 10 mA load current the voltage drop is 150 mV, which matters for low-voltage analog paths running at 1.8 V or 3.3 V.
340 MHz bandwidth and 5.7 ns switching — fast enough for RF and digital muxing
The -3 dB bandwidth of 340 MHz means the switch passes signals up to UHF frequencies with minimal attenuation, suitable for RF path selection or high-speed digital multiplexing. The maximum turn-on time of 5.7 ns and turn-off time of 3.8 ns allow the switch to follow fast control signals without introducing timing skew in the data path.
No separate level translator is needed when the switch interfaces between a 1.8 V microcontroller and a 3.3 V peripheral — the supply rail sets the logic threshold.