Datasheet

73M1866B/73M1966B Data Sheet DS_1x66B_001
10 Rev. 1.6
2.3 73M1906B 32-Pin QFN Pinout
Figure 4 shows the 73M1906B 32-pin QFN pinout.
6
7
8
9
5
4
3
2
1
17
18
19
20
24
23
22
21
10 11 12 13 14 15 16
32
31
30 29 28 27 26 25
GPIO7
TSC
DX
VPD
FS
PCLKO
PCLKI
VND
SDO
SDI
SDIT
RST
VPD
VPT
PRP
PRM
VNA /
VNPLL
VBG
AOUT
VPA /
VPPLL
N/C
VNT
N/C N/C
73M1906B
GPIO5
GPIO6
DR
VPD
CS
SCLK
INT
VND
Figure 4: 73M1906B 32-Pin QFN Pinout
Table 3 describes the pin functions for the device. Decoupling capacitors on the power supplies should
be included for each pair of supply pins.
Table 3: 73M1906B 32-Pin QFN Pin Definitions
Pin
Number
Pin Name
Type Description
1 GPIO7 I/O Configurable input/output pin
2 TSC O PCM time slot control (active low)
3 DX O PCM received data from the A to D
4 VPD PWR Positive digital supply
5
FS
I/O PCM frame synchronization
6 PCLKO O PCM clock output
7
PCLKI
I
PCM clock in
8 VND GND Negative digital ground
9 VNA/VNPLL GND Negative analog/PLL ground
10 VBG O Band gap voltage reference monitor
11 AOUT O Audio output – must be buffered for speaker
12
VPA/VPPLL
PWR
Positive analog/PLL supply
13 N/C – No connect
14 VNT GND Negative transformer supply
15 N/C – No connect
16 N/C – No connect