PIN CONFIGURATION
PIN ASSIGNMENTS
TOP VIEW
SSOP
PIN NAME TYPE
FUNCTION
1
2
MCKI
IN
Master Clock Input.
SCKO
OUT
System Clock Out. This output is 256fS or 384fS
system clock generated by the internal PLL.
MCKI
SCKO
VCP
1
2
3
4
5
6
7
8
9
24 NC
3
VCP
SCKI
RES
ML
PWR
IN
PLL Power Supply (+5V)
23 PGND
22 DGND
21 VDD
4
System Clock (256fS or 384fS) Input.
Reserved for factory use, do not connect.
Latch for serial control data
Clock for serial control data
Data for serial control
5
N/A
IN
6*
7*
8*
9*
SCKI
RES
ML
MC
IN
20 RES
19 TEST
18 LRCIN
17 DIN
MD
IN
RSTB
IN
Reset Input. When this pin is low, the digital
filters and modulators are held in reset.
MC
10
ZERO
OUT
Zero Data Flag. This pin is low when the input
data is continuously zero for more than 65, 535
cycles of BCKIN.
MD
RSTB
16 BCKIN
15 CAP
11
12
13
14
15
V
OUTR
OUT
GND
PWR
OUT
Right Channel Analog Output
Analog Ground
AGND
VCC
ZERO 10
VOUT
11
Analog Power Supply (+5V)
Left Channel Analog Output
Common pin for analog output amplifiers.
Bit clock for clocking in the audio data.
Serial audio data input
R
14 VOUT
13 VCC
L
VOUT
L
CAP
AGND 12
16* BCKIN
17* DIN
18* LRCIN
IN
IN
IN
Left/Right Word Clock. Frequency is equal to fS.
Test pin, must be tied “LOW”.
Reserved for factory use, do not connect.
Analog Power Supply (+5V)
Digital Ground
19
20
21
22
23
24
TEST
RES
N/A
N/A
PWR
GND
GND
—
PACKAGE INFORMATION
VDD
PACKAGE DRAWING
NUMBER(1)
DGND
PGND
NC
PRODUCT
PACKAGE
PLL Ground
PCM1721
24-Pin SSOP
338
No Connection
* These pins include internal pull-up resistors.
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix C of Burr-Brown IC Data Book.
ABSOLUTE MAXIMUM RATINGS
Power Supply Voltage....................................................................... +6.5V
+VCC to +VDD Difference ................................................................... ±0.1V
Input Logic Voltage .................................................. –0.3V to (VDD + 0.3V)
Power Dissipation .......................................................................... 530mW
Operating Temperature Range ............................................. 0°C to +70°C
Storage Temperature ...................................................... –55°C to +125°C
Lead Temperature (soldering, 5s) .................................................. +260°C
Thermal Resistance, θJA ....................................................................................... +70°C/W
®
3
PCM1721
BB [ BURR-BROWN CORPORATION ]
