PCA9600DP-T NXP Semiconductors, PCA9600DP-T Datasheet - Page 22

• Manufacturer Part Number: PCA9600DP-T
• Manufacturer: NXP Semiconductors

Specifications of PCA9600DP-T

• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Package Type: TSSOP
• Pin Count: 8
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

NXP Semiconductors
PCA9600_4
Product data sheet
Fig 25. Wiring transients limited by a Schottky diode
Question: If we add 100
smaller. Is this a good idea?
Answer: No, it is not necessary to add any resistance. When the logic signal generated
by TX or TY of PCA9600 drives long traces or wiring with ICs other than PCA9600
being driven, then adding a Schottky diode (BAT54A) as shown in
the wiring undershoot to a value that will not cause conduction of the IC’s internal
diodes.
voltage
Rev. 04 — 11 November 2009
SX
(V)
5 V
RX
PCA9600
TX
6
4
2
0
2
horizontal scale = 62.5 ns/div
send
send
to 200
5 V
300
at signal line, the overshoot becomes slightly
2 meter
cable
receive
5 V
1 /
300
receive
2 BAT54A
time (ns)
Dual bidirectional bus buffer
GND
RX
TX
002aaf083
5 V
SX
Figure 25
PCA9600
© NXP B.V. 2009. All rights reserved.
will clamp
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