pca9601 NXP Semiconductors, pca9601 Datasheet - Page 14

• Manufacturer Part Number: pca9601
• Description: Dual Bidirectional Bus Buffer
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Table 7.
Refer to
PCA9601_1
Product data sheet
V
(V)
5
5
3.3
3.3
Fig 15. Driving ribbon or flat telephone cables
CC1
+V
cable
(V)
12
12
5
5
Figure
MASTER
I
2
C-BUS
Examples of bus capability
V
GND
CC1
15.
V
(V)
5
5
3.3
3.3
CC2
SCL
SDA
C2
R2
330
330
R1
(Ω)
750
750
For more examples of faster alternatives for driving over longer cables such as Cat5
communication cable, see AN10658. Communication at 1 MHz is possible over short
cables and > 400 kHz is possible over 50 m of cable.
R2
SX
SY
C2
R2
(kΩ)
2.2
2.2
1
1
PCA9601
V
C2
(pF)
220
100
400
220
CC
RX
TX
TY
RY
All information provided in this document is subject to legal disclaimers.
+V cable drive
Cable
length
(m)
250
100
25
3
R1
BAT54A
Rev. 01 — 28 May 2010
R1
Cable
capacitance
n/a
(delay based)
n/a
(delay based)
1 nF
120 pF
delay ≈ 5 ns/m
propagation
cable
Cable
delay
1.25 μs
500 ns
125 ns
15 ns
BAT54A
R1
R1
Set master
nominal SCL
HIGH
period
(ns)
600
600
260
260
RX
RY
TX
TY
PCA9601
LOW
period
(ns)
3850
2450
770
720
V
CC
Dual bidirectional bus buffer
C2
SX
SY
R2
620
690
Effective
bus
clock
speed
(kHz)
125
195
R2
SDA
SCL
C2
PCA9601
© NXP B.V. 2010. All rights reserved.
SLAVE(S)
V
I
GND
002aae879
2
CC2
C-BUS
meets Fm+
meets Fm+
Max. slave
response
delay
normal
specification
400 kHz parts
normal
specification
400 kHz parts
specification
specification
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