pca9544ad NXP Semiconductors, pca9544ad Datasheet - Page 2

• Manufacturer Part Number: pca9544ad
• Description: Pca9544a 4-channel I2c Multiplexer With Interrupt Logic
• Manufacturer: NXP Semiconductors

Philips Semiconductors
FEATURES
ORDERING INFORMATION
Standard packing quantities and other packaging data are available at www.standardproducts.philips.com/packaging.
I
2
2004 Sep 29
C is a trademark of Philips Semiconductors Corporation.
1-of-4 bi-directional translating multiplexer
I
4 Active-LOW Interrupt Inputs
Active-LOW Interrupt Output
3 address pins allowing up to 8 devices on the I
Channel selection via I
Power-up with all multiplexer channels deselected
Low Rds
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,
200 V MM per JESD22-A115 and 1000 V per JESD22-C101
Latchup testing is done to JESDEC Standard JESD78 which
exceeds 100 mA
Three packages offered: SO20, TSSOP20, and HVQFN20
4-channel I
2
20-Pin Plastic TSSOP
20-Pin Plastic HVQFN
C interface logic; compatible with SMBus
20-Pin Plastic SO
PACKAGES
ON
switches
2
2
C multiplexer with interrupt logic
C-bus
TEMPERATURE RANGE
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
2
C-bus
ORDER CODE
PCA9544APW
PCA9544ABS
PCA9544AD
2
DESCRIPTION
The PCA9544A is a 1-of-4 bi-directional translating multiplexer,
controlled via the I
four 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. Four interrupt inputs, INT0 to INT3,
one for each of the SCx/SDx downstream pairs, are provided. One
interrupt output, INT, which acts as an AND of the four interrupt
inputs, is provided.
A power-on reset function puts the registers in their default state and
initializes the I
The pass gates of the multiplexer are constructed such that the V
pin can be used to limit the maximum high voltage which will be
passed by the PCA9544A. This allows the use of different bus
voltages on each SCx/SDx pair, so that 1.8 V, 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.
2
C state machine with no channels selected.
TOPSIDE MARK
2
PCA9544AD
C-bus. The SCL/SDA upstream pair fans out to
PA9544A
9544A
DRAWING NUMBER
PCA9544A
Product data sheet
SOT163-1
SOT360-1
SOT662-1
DD