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PCA9544AD Datasheet

4-channel I2C-bus multiplexer

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PCA9544A
4-channel I2C-bus multiplexer with interrupt logic
Rev. 5 — 23 April 2014
Product data sheet
1. General description
The PCA9544A is a 1-of-4 bidirectional translating multiplexer, controlled via the I2C-bus.
The SCL/SDA upstream pair fans out to 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 I2C-bus
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 is 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. Features and benefits
1-of-4 bidirectional translating multiplexer
I2C-bus interface logic; compatible with SMBus
4 active LOW interrupt inputs
Active LOW interrupt output
3 address pins allowing up to 8 devices on the I2C-bus
Channel selection via I2C-bus
Power-up with all multiplexer channels deselected
Low Ron 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 standby current
Operating power supply voltage range of 2.3 V to 5.5 V
5 V tolerant Inputs
0 Hz to 400 kHz clock frequency
ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per
JESD22-C101
Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
Three packages offered: SO20, TSSOP20 and HVQFN20


NXP Semiconductors Electronic Components Datasheet

PCA9544AD Datasheet

4-channel I2C-bus multiplexer

No Preview Available !

NXP Semiconductors
PCA9544A
4-channel I2C-bus multiplexer with interrupt logic
3. Ordering information
Table 1. Ordering information
Type number Topside
marking
Package
Name
PCA9544ABS 9544A
HVQFN20
PCA9544AD PCA9544AD SO20
PCA9544APW PA9544A
TSSOP20
Description
plastic thermal enhanced very thin quad flat package;
no leads; 20 terminals; body 5 5 0.85 mm
plastic small outline package; 20 leads; body width 7.5 mm
plastic thin shrink small outline package; 20 leads;
body width 4.4 mm
Version
SOT662-1
SOT163-1
SOT360-1
3.1 Ordering options
Table 2. Ordering options
Type number Orderable
part number
Package Packing method
PCA9544ABS
PCA9544AD
PCA9544APW
PCA9544ABS,118
PCA9544AD,112
PCA9544AD,118
PCA9544APW,112
PCA9544APW,118
HVQFN20
SO20
SO20
TSSOP20
TSSOP20
Reel 13” Q1/T1
*Standard mark SMD
Standard marking
* IC’s tube - DSC bulk pack
Reel 13” Q1/T1
*Standard mark SMD
Standard marking
* IC’s tube - DSC bulk pack
Reel 13” Q1/T1
*Standard mark SMD
Minimum
order
quantity
6000
1520
2000
1875
2500
Temperature range
Tamb = 40 C to +85 C
Tamb = 40 C to +85 C
Tamb = 40 C to +85 C
Tamb = 40 C to +85 C
Tamb = 40 C to +85 C
PCA9544A
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 5 — 23 April 2014
© NXP Semiconductors N.V. 2014. All rights reserved.
2 of 31


Part Number PCA9544AD
Description 4-channel I2C-bus multiplexer
Maker NXP
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PCA9544AD Datasheet PDF






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