PS9352AL2

Chapter Title

R08DS0129EJ0100 Rev.1.00

Page 16 of 19

Aug 24, 2015

(4) Cautions

• Fluxes

Avoid removing the residual flux with freon-based and chlorine-based cleaning solvent.

2. Cautions regarding noise

Be aware that when voltage is applied suddenly between the photocoupler’s input and output at startup, the output

transistor may enter the on state, even if the voltage is within the absolute maximum ratings.

USAGE CAUTIONS

1. This product is weak for static electricity by designed with high-speed integrated circuit so protect against static

electricity when handling.

2. Board designing

reduces high frequency quantization noise from the PS9352A and convers from one-bit data stream to 3-wire

serial data.

Fig. PS9352A Typical application circuit

(2) By-pass capacitor of more than 0.1

distance between the leads of the photocoupler and capacitor is no more than 10 mm.

possible. MCLK and MDAT are digital signal, but when the lines between the photocoupler and a digital filter

are long, the digital filter might not read the data.

When using long lines, use a line driver between the photocoupler and the digital filter, and keep the pattern

between the output (MCLK, MDAT) and the line driver as short as possible.

(4) Do not connect any routing to the portion of the frame exposed between the pins on the package of the

photocoupler. If connected, it will affect the photocoupler's internal voltage and the photocoupler will not

operate normally.

(5) Because the maximum frequency of the signal input to the photocoupler must be lower than the allowable

frequency band, be sure to connect an anti-aliasing filter (an RC filter with R = 39

 and C = 0.01

F, for

example).

(6) When VDD is lower than 4.5 V that is the outside of recommended operating condition, the output (MCLK,

MDAT) of this product is unstable, and this might produce undesirable operation. Be sure to check the

operation of an IC that is connected to this product during Power-up and Power-down process. And we

recommend to use a disable function (shutdown function) of the connected IC or a reset IC to avoid this

undesirable operation.

3. Avoid storage at a high temperature and high humidity.

MCLK

MDAT

+5V

0.1uF

39



0.01uF

CLK

DAT

GND

SCLK

SDAT

CS

GND2

GND1

PS9551A

+5V

0.1uF

3-Wire Serial

Interface

PS9352A