Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Audio Processor IC
PT2319
DESCRIPTION
PT2319 is an audio processor IC specially designed for high fidelity audio applications utilizing
advanced CMOS processing technology. Included in the IC are 5 stereo input signal ports, super bass
and bass/treble controls, volume control, balance/fader controls and muting.
The internal circuits of PT2319 have undergone meticulous adjustment to achieve the finest possible
audio quality. Extremely low signal distortion, strong signal driving ability, and clear dynamic peak and
level sound quality at any volume level distinguish PT2319 from other audio processors. PT2319 is the
ideal solution for audio systems catering to the most demanding audiophiles.
FEATURES
CMOS process technology
Low level output signal loss: Typ.=0.003% at VOUT=1Vrms
High level output driving ability: load impedance as low as 600Ω
Large output amplitude
Five stereo input signal ports
Volume, balance and fader controls
Super bass, bass and treble controls
Select Out supports addition of externals circuits
Built-in automatic power-on reset
3-wire digital control interface
36-pin SSOP packaging
APPLICATIONS
High fidelity audio systems
Car audio systems
PT2319 V1.4
-1-
December, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Audio Processor IC
PT2319
VDD
BLOCK DIAGRAM
VSS
CE
CL
DI
LROUT
LFOUT
Output Gain
& Fader
Output Gain
& Fader
RROUT
RFOUT
LFIN
Super
Bass
Super
Bass
LOUT
LSB
LBASS2
LBASS1
RFIN
ROUT
RSB
RBASS2
RBASS1
Bass
Control
Interface
Control Circuit
Control Circuit
Control Circuit
Treble
RvREF
LVref
LTRE
Treble
Bass
RTRE
LIN
Input
Gain
+
+
RIN
Input
Gain
LSELO
RSELO
Input
SEL.
Input
SEL.
L2
L1 Vref
R1
R2
R3
R4
L5
L4
L3
R5
PT2319 V1.4
-2-
December, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Audio Processor IC
PT2319
PIN CONFIGURATION
DI
CE
VS S
LROUT
LFOUT
LFIN
LOUT
LSB
LBAS S2
LBAS S1
LTRE
LIN
LSELO
L5
L4
L3
L2
L1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
CL
VDD
RROUT
RF OUT
RF IN
ROUT
RSB
RBA SS 2
RBA SS 1
RTR E
RIN
RSE LO
R5
R4
R3
R2
R1
Vref
P T 23 1 9
PT2319 V1.4
-3-
December, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Audio Processor IC
PT2319
PIN DESCRIPTION
Pin No.
1
2
3
4
5
7
8
9
10
11
13
14
15
16
17
18
19
20
21
22
23
24
25
27
28
29
30
31
33
34
35
36
Pin Name
DI
CE
VSS
LROUT
LFOUT
LOUT
LSB
LBASS2
LBASS1
LTRE
LSELO
L5
L4
L3
L2
L1
Vref
R1
R2
R3
R4
R5
RSELO
RTRE
RBASS1
RBASS2
RSB
ROUT
RFOUT
RROUT
VDD
CL
Function
3-wire serial data pin
3-wire chip enable pin
Ground pin
Left rear channel output pin
Left front channel output pin
Left super bass output and external component connection pin
Left super bass external component connection pin
Left bass filter external component connection pin 2
Left bass filter external component connection pin 1
Capacitor connection pin for configuring treble filter (left)
Input selector output pin (left)
Input signal pin 5 (left)
Input signal pin 4 (left)
Input signal pin 3 (left)
Input signal pin 2 (left)
Input signal pin 1 (left)
Reference voltage bypass capacitor
Input signal pin 1 (right)
Input signal pin 2 (right)
Input signal pin 3 (right)
Input signal pin 4 (right)
Input signal pin 5 (right)
Input selector output pin (right)
Capacitor connection pin for configuring treble filter (right)
Right bass filter external component connection pin 1
Right bass filter external component connection pin 2
Right super bass external component connection pin
Right super bass output and external component connection pin
Right front channel output pin
Right rear channel output pin
Power supply pin
3-wire serial clock input pins
PT2319 V1.4
-4-
December, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Audio Processor IC
PT2319
FUNCTION DESCRIPTION
CONTROLLER FUNCTIONS
Function
Volume
Control
Scope
81-step
gain
control
Range
0dB to –79dB
Step 81 is -∞
Step
Each step 1dB
Other
Left and right channel gain can
be adjusted independently as a
balance control.
Output Total of 16 0dB to -60dB
and Fader
steps
Step 16 is -∞
Bass
control
Treble
control
Super
bass
Input
selector
gain
Output
gain
Input
signal
selector
Total 15
steps
Total 15
steps
Total 11
steps
Total 16
steps
Total 3
steps
Total 5
inputs
±11.9dB
±11.9dB
0dB to +20dB
0dB to
+18.75dB
0dB, +6.5dB,
+8.5dB
0dB to -20dB: 2dB steps
-20dB to -25dB: 5dB steps Can select attenuation for either
-25dB to -45dB: 10dB steps the front or rear channels.
Then –60dB and -∞
Each step 1.9dB
Each step 1.9dB
Each step 2dB
Each step 1.25dB
Super bass gain boost only
Stereo inputs
PT2319 V1.4
-5-
December, 2005
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