An248 – Cirrus Logic AN248 User Manual
Page 4
AN248
4
2.2
Transitioning from the CS4334/5/8
2.2.1
Hardware changes
The CS4344 family adds two filter pins (which require capacitors) to the eight pins of the CS4334
family. The CS4344 family also uses a smaller lead pitch which takes up about 50% less space than
the CS4334 family.
Figure 3 shows an example schematic for the CS4334. Figure 1 shows the modified new schematic
for the CS4344
The changes made between Figures 3 and 1 were as follows:
•
Removed the 267 k
Ω resistors R1 and R4.
•
Added the 10
µF C7, and added the 3.3 µF C8.
•
changed R3 and R5 to 470
Ω.
•
replaced CS4334 with CS4344.
•
Note that the same C4 and C6 capacitors may be used.
The following table shows the pin for pin mapping between the two part families:
Table 4. CS4334 to CS4344 pin mapping
Note that the AOUTL and AOUTR pins have changed position.
pin name
CS4334 family
CS4344 family
SDATA > SDIN
1
1
DEM/SCLK
2
2
LRCK
3
3
MCLK
4
4
AOUTR
5
10
GND
6
8
VA
7
9
AOUTL
8
7
VQ
5
FILT+
6
Figure 3. CS4334 family Design Schematic