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參數資料
| 型號： | PCA9545A |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 4-channel I2C switch with interrupt logic and reset |
| 中文描述： | 4通道的I2C中斷邏輯開關和復位 |
| 文件頁數： | 16/27頁 |
| 文件大小： | 155K |
| 代理商： | PCA9545A |
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9397 750 14311
Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 03 — 3 March 2005
16 of 27
Philips Semiconductors
PCA9545A
4-channel I
2
C switch with interrupt logic and reset
12. Dynamic characteristics
[1]
Pass gate propagation delay is calculated from the 20
typical R
on
and the 15 pF load capacitance.
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.
[2]
[3]
C
b
= total capacitance of one bus line in pF.
Measurements taken with 1 k
pull-up resistor and 50 pF load.
[4]
Table 9:
Symbol
Dynamic characteristics
Parameter
Conditions
Standard-mode
I
2
C-bus
Min
-
Fast-mode I
2
C-bus
Unit
Max
0.3
[1]
Min
Max
0.3
[1]
t
PD
propagation delay from SDA to SDn, or
SCL to SCn
SCL clock frequency
bus free time between a STOP and
START condition
hold time (repeated) START condition.
After this period, the first clock pulse is
generated.
LOW period of the SCL clock
HIGH period of the SCL clock
setup time for a repeated START
condition
setup time for STOP condition
data hold time
data setup 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 which must be
suppressed by the input filter
data valid time
-
ns
f
SCL
t
BUF
0
4.7
100
-
0
1.3
400
-
kHz
μ
s
t
HD;STA
4.0
-
0.6
-
μ
s
t
LOW
t
HIGH
t
SU;STA
4.7
4.0
4.7
-
-
-
1.3
0.6
0.6
-
-
-
μ
s
μ
s
μ
s
t
SU;STO
t
HD;DAT
t
SU;DAT
t
r
t
f
C
b
t
SP
4.0
0
[2]
250
-
-
-
-
-
3.45
-
1000
300
400
50
0.6
0
[2]
100
20 + 0.1C
b
[3]
20 + 0.1C
b
[3]
-
-
-
0.9
-
300
300
400
50
μ
s
μ
s
ns
ns
μ
s
μ
s
ns
t
VD;DAT
HIGH-to-LOW
LOW-to-HIGH
[4]
-
1
0.6
1
-
-
-
1
0.6
1
μ
s
μ
s
μ
s
[4]
-
t
VD;ACK
INT
t
v(INTnN-INTN)
valid time from INTn to INT signal
t
d(INTnN-INTN)
delay time from INTn to INT inactive
t
w(rej)L
LOW-level rejection time
t
w(rej)H
HIGH-level rejection time
RESET
t
w(rst)L
LOW-level reset time
t
rst
reset time (SDA clear)
t
REC;STA
recovery time to START condition
data valid Acknowledge
-
-
-
1
0.5
4
2
-
-
-
100
1
0.5
4
2
-
-
μ
s
μ
s
μ
s
μ
s
INTn inputs
INTn inputs
4
500
0
-
-
-
4
500
0
-
-
-
ns
ns
ns
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相關代理商/技術參數 |
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|---|---|
| PCA9545ABS | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:4-channel I2C-bus switch with interrupt logic and reset |
| PCA9545ABS,118 | 功能描述:多路器開關 IC I2C SWITCH 4CH RoHS:否 制造商:Texas Instruments 通道數量:1 開關數量:4 開啟電阻（最大值）:7 Ohms 開啟時間（最大值）: 關閉時間（最大值）: 傳播延遲時間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UQFN-16 |
| PCA9545ABS-T | 功能描述:多路器開關 IC I2C SWITCH 4CH RoHS:否 制造商:Texas Instruments 通道數量:1 開關數量:4 開啟電阻（最大值）:7 Ohms 開啟時間（最大值）: 關閉時間（最大值）: 傳播延遲時間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UQFN-16 |
| PCA9545AD | 功能描述:多路器開關 IC 4-CH I2C SWITCH W/INT+RESET RoHS:否 制造商:Texas Instruments 通道數量:1 開關數量:4 開啟電阻（最大值）:7 Ohms 開啟時間（最大值）: 關閉時間（最大值）: 傳播延遲時間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UQFN-16 |
| PCA9545AD,112 | 功能描述:多路器開關 IC 4-CH I2C SWITCH RoHS:否 制造商:Texas Instruments 通道數量:1 開關數量:4 開啟電阻（最大值）:7 Ohms 開啟時間（最大值）: 關閉時間（最大值）: 傳播延遲時間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UQFN-16 |
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