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PCA9601DP 데이터시트(PDF) 14 Page - NXP Semiconductors

부품명 PCA9601DP
상세설명  Dual bidirectional bus buffer
PDF  32 Pages
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제조업체  NXP [NXP Semiconductors]
홈페이지  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCA9601DP 데이터시트(HTML) 14 Page - NXP Semiconductors

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PCA9601
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 2 — 6 May 2011
14 of 32
NXP Semiconductors
PCA9601
Dual bidirectional bus buffer
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.
Fig 15. Driving ribbon or flat telephone cables
PCA9601
SCL
RX
TX
002aae879
SX
VCC
TY
RY
SY
R2
R2
C2
C2
I2C-BUS
MASTER
SDA
VCC1
GND
R1
R1
BAT54A
cable
propagation
delay
≈ 5 ns/m
BAT54A
R1
R1
PCA9601
RX
TX
TY
RY
VCC
SX
SY
R2
R2
SCL
SDA
VCC2
GND
I2C-BUS
SLAVE(S)
C2
C2
+V cable drive
Table 7.
Examples of bus capability
Refer to Figure 15.
VCC1
(V)
+V
cable
(V)
VCC2
(V)
R1
(
Ω)
R2
(k
Ω)
C2
(pF)
Cable
length
(m)
Cable
capacitance
Cable
delay
Set master
nominal SCL
Effective
bus
clock
speed
(kHz)
Max. slave
response
delay
HIGH
period
(ns)
LOW
period
(ns)
5
12
5
750
2.2
400
250
n/a
(delay based)
1.25
μs 600
3850
125
normal
specification
400 kHz parts
5
12
5
750
2.2
220
100
n/a
(delay based)
500 ns
600
2450
195
normal
specification
400 kHz parts
3.3
5
3.3
330
1
220
25
1 nF
125 ns
260
770
620
meets Fm+
specification
3.3
5
3.3
330
1
100
3
120 pF
15 ns
260
720
690
meets Fm+
specification



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