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參數(shù)資料
| 型號： | PCA9545PW |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 通用總線功能 |
| 英文描述： | 4-channel I2C switch with interrupt logic and reset |
| 中文描述： | 9545 SERIES, 4 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDSO20 |
| 封裝： | 4.40 MM, PLASTIC, MO-153, SOT-360-1, TSSOP-20 |
| 文件頁數(shù)： | 2/14頁 |
| 文件大小： | 118K |
| 代理商： | PCA9545PW |
Philips Semiconductors
Product data
PCA9545
4-channel I
2
C switch with interrupt logic and reset
2
2002 Mar 28
853-2302 27940
FEATURES
1-of-4 bi-directional translating switches
I
2
C interface logic; compatible with SMBus standards
4 active low interrupt inputs
Active low interrupt output
Active low reset input
2 address pins allowing up to 4 devices on the I
2
C bus
Channel selection via I
2
C bus, in any combination
Power up with all switch channels deselected
Low RDS
ON
switches
Allows voltage level translation between 1.8 V, 2.5 V, 3.3 V and
5 V buses
No glitch on power-up
Supports hot insertion
Low stand-by current
Operating power supply voltage range of 2.3 V to 5.5 V
5 V tolerant Inputs
0 to 400 kHz clock frequency
ESD protection exceeds 2000 V HBM per JESD22-A114,
150 V MM per JESD22-A115 and 1000 V per JESD22-C101
Latch-up testing is done to JESDEC Standard JESD78 which
exceeds 100 mA
Package Offer: SO20, TSSOP20
DESCRIPTION
The PCA9545 is a quad bi-directional translating switch controlled
via the I
2
C bus. The SCL/SDA upstream pair fans out to four
downstream pairs, or channels. Any individual SCx/SDx channel or
combination of channels can be selected, determined by the
contents of the programmable control register. Four interrupt inputs,
INT0 to INT3, one for each of the downstream pairs, are provided.
One interrupt output, INT, acts as an AND of the four interrupt
inputs.
An active-LOW reset input allows the PCA9545 to recover from a
situation where one of the downstream I
2
C buses is stuck in a LOW
state. Pulling the RESET pin LOW resets the I
2
C state machine and
causes all the channels to be deselected as does the internal power
on reset function.
The pass gates of the switches are constructed such that the V
DD
pin can be used to limit the maximum high voltage which will be
passed by the PCA9545. This allows the use of different bus
voltages on each pair, so that 1.8 V or 2.5 V or 3.3 V parts can
communicate with 5 V parts without any additional protection.
External pull-up resistors pull the bus up to the desired voltage level
for each channel. All I/O pins are 5 V tolerant.
PIN CONFIGURATION
A0
A1
RESET
INT0
SD1
V
DD
SDA
SCL
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
SD0
SC0
INT1
INT
SC3
SD3
INT3
SC2
9
12
10
11
SC1
VSS
SD2
INT2
SW00762
Figure 1. Pin configuration
PIN DESCRIPTION
PIN
NUMBER
1
SYMBOL
FUNCTION
A0
Address input 0
2
A1
Address input 1
3
RESET
Active low reset input
4
INT0
Active low interrupt input 0
5
SD0
Serial data 0
6
SC0
Serial clock 0
7
INT1
Active low interrupt input 1
8
SD1
Serial data 1
9
SC1
Serial clock 1
10
V
SS
INT2
Supply ground
11
Active low interrupt input 2
12
SD2
Serial data 2
13
SC2
Serial clock 2
14
INT3
Active low interrupt input 3
15
SD3
Serial data 3
16
SC3
Serial clock 3
17
INT
Active low interrupt output
18
SCL
Serial clock line
19
SDA
Serial data line
20
V
DD
Supply voltage
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
–40 to +85
°
C
–40 to +85
°
C
ORDER CODE
DRAWING NUMBER
20-Pin Plastic SO
PCA9545D
SOT163-1
20-Pin Plastic TSSOP
Standard packing quantities and other packaging data is available at www.philipslogic.com/packaging.
PCA9545PW
SOT360-1
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相關代理商/技術參數(shù) |
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|---|---|
| PCA9546 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:4-channel I2C switch with reset |
| PCA9546A | 制造商:TI 制造商全稱:Texas Instruments 功能描述:4-CHANNEL I2C AND SMBus SWITCH WITH RESET FUNCTION |
| PCA9546A_1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:4-CHANNEL I2C AND SMBus SWITCH WITH RESET FUNCTION |
| PCA9546A_2 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:4-CHANNEL I2C AND SMBus SWITCH WITH RESET FUNCTION |
| PCA9546A_3 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:4-CHANNEL I2C AND SMBus SWITCH WITH RESET FUNCTION |
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