Datasheet
LM49370
www.ti.com
SNAS356D –FEBRUARY 2007–REVISED MARCH 2012
Pin Descriptions (continued)
Pin Pin Name Type Direction Description
E7 I2S_SDI Digital Input I2S Serial Data Input
F1 HP_VMID_FB Analog Input VMID Feedback in OCL
mode, otherwise a 2nd
headset detection input
F2 LS_V
DD
Supply Input Loudspeaker V
DD
F3 CPI_POS Analog Input Cell Phone analog input
positive
F4 CPO_NEG Analog Output Cell Phone analog output
negative
F5 AUX_OUT_NEG Analog Output Auxiliary analog output
negative
F6 I2S_WS Digital Inout I2S Word Select Signal
(can be master or slave)
F7 I2S_CLK Digital Inout I2S Clock Signal (can be
master or slave)
G1 LS_NEG Analog Output Loudspeaker negative
output
G2 LS_V
SS
Supply Input Loudspeaker ground
G3 LS_POS Analog Output Loudspeaker positive
output
G4 CPO_POS Analog Output Cell Phone analog output
positive
G5 AUX_OUT_POS Analog Output Auxiliary analog output
positive
G6 D_V
SS
Supply Input Digital ground
G7 MCLK Digital Input Input clock from 0.5 MHz
to 30 MHz
PIN TYPE DEFINITIONS
Analog Input—A pin that is used by the analog and is never driven by the device. Supplies are part of this
classification.
Analog Output—A pin that is driven by the device and should not be driven by external sources.
Analog Inout—A pin that is typically used for filtering a DC signal within the device, Passive components can be
connected to these pins.
Digital Input—A pin that is used by the digital but is never driven.
Digital Output—A pin that is driven by the device and should not be driven by another device to avoid
contention.
Digital Inout—A pin that is either open drain (I2C_SDA) or a bidirectional CMOS in/out. In the later case the
direction is selected by a control register within the LM49370.
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
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