© Semiconductor Components Industries, LLC, 2010
July, 2010 − Rev. 0
1 Publication Order Number:
EVBUM2003/D
NCN1154MUTGEVB
NCN1154 DP3T USB 2.0
High Speed Audio Switch
Evaluation Board User's
Manual
Prepared by: Bertrand RENAUD
On Semiconductor
OVERVIEW
The NCN1154 is a DP3T switch for combined
true−ground audio, USB 2.0 high speed data, and UART
applications. It allows portable systems to use a single port
to pass either USB data or audio signals from an external
headset. The switch is capable of passing signals with
negative voltages as low as 2 V below ground.
The NCN1154 features shunt resistors on the audio ports.
These resistors are switched in when the audio channel is off
and provide a safe path to ground for any charge that may
build up on the audio lines.
This reduces Pop & Click noise in the audio system. The
device has an extended V
CC
range which can operate off
V
CC
up to 4.2 V while passing true ground audio signals
down to −2 V.
The NCN1154 is housed in a space saving, ultra low
profile 1.7 x 2.0 x 0.5 mm 12 pin DFN package.
Figure 1. Board Picture
http://onsemi.com
EVAL BOARD USER’S MANUAL
