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參數(shù)資料
| 型號(hào)： | 935266674112 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 編、解碼器及復(fù)用、解復(fù)用 |
| 英文描述： | 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDSO8 |
| 封裝： | 3.90 MM, PLASTIC, MS-012, SOT-96-1, SO-8 |
| 文件頁(yè)數(shù)： | 6/13頁(yè) |
| 文件大?。?/td> | 105K |
| 代理商： | 935266674112 |
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Philips Semiconductors
Product data
PCA9540
2-channel I2C multiplexer
2
2002 May 13
853–2185 28186
FEATURES
1-of-2 bi-directional translating multiplexer
I2C interface logic; compatible with SMBus standards
Channel selection via I2C bus
Power up with all multiplexer 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,
100 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: SO8, TSSOP8
DESCRIPTION
The PCA9540 is a 1-of-2 bi-directional translating multiplexer,
controlled via the I2C bus. The SCL/SDA upstream pair fans out to
two SCx/SDx downstream pairs, or channels. Only one SCx/SDx
channel is selected at a time, determined by the contents of the
programmable control register.
A power-on reset function puts the registers in their default state and
initializes the I2C state machine with no channels selected.
The pass gates of the multiplexer are constructed such that the VDD
pin can be used to limit the maximum high voltage which will be
passed by the PCA9540. This allows the use of different bus
voltages on each SCx/SDx pair, so that 1.8 V, 2.5, or 3.3 V parts can
communicate with 5 V parts without any additional protection.
External pull-up resistors can pull the bus up to the desired voltage
level for this channel. All I/O pins are 5 V tolerant.
PIN CONFIGURATION
1
2
3
45
6
7
8
SCL
SDA
VDD
SD0
SC1
SD1
SC0
VSS
SW00491
Figure 1. Pin configuration
PIN DESCRIPTION
PIN
NUMBER
SYMBOL
FUNCTION
1
SCL
Serial clock line
2
SDA
Serial data line
3
VDD
Supply voltage
4
SD0
Serial data 0
5
SC0
Serial clock 0
6
VSS
Supply ground
7
SD1
Serial data 1
8
SC1
Serial clock 1
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
ORDER CODE
DRAWING NUMBER
8-Pin Plastic SO
–40 to +85
°C
PCA9540D
SOT96-1
8-Pin Plastic TSSOP
–40 to +85
°C
PCA9540DP
SOT505-1
Standard packing quantities and other packaging data is available at www.philipslogic.com/packaging.
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