Cirrus Logic AN248 - 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