Datasheet
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28
27
26
25
24
23
22
21
20
19
18
17
16
15
D+
D-
V
BUS
DGNDU
HID0
HID1
HID2
SEL0
SEL1
V
CCC
AGNDC
V L
IN
V R
IN
V
COM
SSPND
DIN
V
CCX
AGNDX
XTO
V
CCP2
DGND
V
CCP1
V L
OUT
XTI
DOUT
V
DD
AGNDP
V R
OUT
PCM2903C
SBFS038 –JUNE 2012
www.ti.com
PIN CONFIGURATIONS
DB PACKAGE
SSOP-28
(TOP VIEW)
PIN DESCRIPTIONS
PIN
NAME NO. I/O DESCRIPTION
AGNDC 11 – Analog ground for codec
AGNDP 18 – Analog ground for PLL
AGNDX 22 – Analog ground for oscillator
D– 2 I/O USB differential input/output minus
(1)
D+ 1 I/O USB differential input/output plus
(1)
DGND 26 – Digital ground
DGNDU 4 – Digital ground for USB transceiver
DIN 24 I S/PDIF input
(2)
DOUT 25 O S/PDIF output
HID0 5 I HID key state input (mute), active-high
(3)
HID1 6 I HID key state input (volume up), active-high
(3)
HID2 7 I HID key state input (volume down), active-high
(3)
SEL0 8 I Must be set to high
(4)
SEL1 9 I Connected to the USB port of V
BUS
(4)
SSPND 28 O Suspend flag, active-low (Low: suspend, High: operational)
V
BUS
3 – Must be connected to V
DD
V
CCC
10 – Analog power supply for codec
(5)
V
CCP1
17 – Analog power supply for PLL
(5)
V
CCP2
19 – Analog power supply for PLL
(5)
V
CCX
23 – Analog power supply for oscillator
(5)
V
COM
14 – Common for ADC/DAC (V
CCC
/2)
(5)
V
DD
27 – Digital power supply
(5)
V
IN
L 12 I ADC analog input for L-channel
V
IN
R 13 I ADC analog input for R-channel
V
OUT
L 16 O DAC analog output for L-channel
V
OUT
R 15 O DAC analog output for R-channel
XTI 21 I Crystal oscillator input
(6)
XTO 20 O Crystal oscillator output
(1) LV-TTL level.
(2) 3.3-V CMOS-level input with internal pulldown, 5-V tolerant.
(3) 3.3-V CMOS-level input with internal pulldown. This pin informs the PC of serviceable control signals such as mute, volume up, or
volume down, which have no direct connection with the internal DAC or ADC. See the Interface #3 and End-Points sections.
(4) TTL Schmitt trigger, 5-V tolerant.
(5) Connect a decoupling capacitor to GND.
(6) 3.3-V CMOS-level input.
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Product Folder Link(s): PCM2903C