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| 型號(hào)： | PCA9549 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Octal bus switch with individually I2C-bus controlled enables |
| 中文描述： | 個(gè)別八路與I2C總線開(kāi)關(guān)，總線控制，使 |
| 文件頁(yè)數(shù)： | 13/24頁(yè) |
| 文件大?。?/td> | 126K |
| 代理商： | PCA9549 |
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PCA9549_1
Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Product data sheet
Rev. 01 — 11 July 2006
13 of 24
Philips Semiconductors
PCA9549
Octal bus switch with individually I
2
C-bus controlled enables
10. Dynamic characteristics
[1]
Pass gate propagation delay is calculated from the 6
typical R
on
and the 50 pF load capacitance.
After this period, the first clock pulse is generated.
[2]
[3]
A device must internally provide a hold time of at least 300 ns for the SDA signal (referred to the V
IH(min)
of the SCL signal) in order to
bridge the undefined region of the falling edge of SCL.
[4]
C
b
= total capacitance of one bus line in pF.
Table 8.
Symbol
Dynamic characteristics
Parameter
Conditions
Standard-mode
I
2
C-bus
Min
-
Fast-mode I
2
C-bus
Unit
Max
0.25
[1]
Min
Max
0.25
[1]
t
PD
propagation delay
A to B;
V
DD
= 4.5 V to 5.5 V
-
ns
f
SCL
t
BUF
SCL clock frequency
bus free time between a STOP and
START condition
hold time (repeated) START condition
LOW period of the SCL clock
HIGH period of the SCL clock
set-up time for a repeated START
condition
set-up time for STOP condition
data hold time
data set-up time
rise time of both SDA and SCL
signals
fall time of both SDA and SCL signals
capacitive load for each bus line
pulse width of spikes that must be
suppressed by the input filter
data valid time
0
4.7
100
-
0
1.3
400
-
kHz
μ
s
t
HD;STA
t
LOW
t
HIGH
t
SU;STA
[2]
4.0
-
-
-
-
0.6
1.3
0.6
0.6
-
-
-
-
μ
s
μ
s
μ
s
μ
s
4.7
4.0
4.7
t
SU;STO
t
HD;DAT
t
SU;DAT
t
r
4.0
0
[3]
250
-
-
3.45
-
1000
0.6
0
[3]
100
20 + 0.1C
b
[4]
300
-
0.9
-
μ
s
μ
s
ns
ns
t
f
C
b
t
SP
-
-
-
300
400
50
20 + 0.1C
b
[4]
300
-
-
μ
s
μ
s
ns
400
50
t
VD;DAT
HIGH-to-LOW
LOW-to-HIGH
-
-
-
1
0.6
1
-
-
-
1
0.6
1
μ
s
μ
s
μ
s
t
VD;ACK
RESET
t
w(rst)L
t
rst
t
REC;STA
data valid acknowledge time
LOW-level reset time
reset time
recovery time to START condition
4
500
0
-
-
-
4
500
0
-
-
-
ns
ns
ns
SDA clear
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCA9549BS | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Octal bus switch with individually I2C-bus controlled enables |
| PCA9549BS,118 | 功能描述:數(shù)字總線開(kāi)關(guān) IC 8-BIT I2C BUS SWITCH RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)數(shù)量:24 傳播延遲時(shí)間:0.25 ns 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:TSSOP-56 封裝:Reel |
| PCA9549BS-T | 功能描述:數(shù)字總線開(kāi)關(guān) IC 8-BIT I2C BUS SWITCH W/RESET RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)數(shù)量:24 傳播延遲時(shí)間:0.25 ns 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:TSSOP-56 封裝:Reel |
| PCA9549D | 功能描述:數(shù)字總線開(kāi)關(guān) IC 8-BIT I2C BUS SWITCH W/RESET RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)數(shù)量:24 傳播延遲時(shí)間:0.25 ns 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:TSSOP-56 封裝:Reel |
| PCA9549D,112 | 功能描述:數(shù)字總線開(kāi)關(guān) IC 8-BIT I2C BUS SWITCH RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)數(shù)量:24 傳播延遲時(shí)間:0.25 ns 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:TSSOP-56 封裝:Reel |
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