PCA9545CPW datasheet, PDF - EEWORLD Datasheet

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PCA9545CPW: Description4-channel I2C switch with interrupt logic and reset; Categorylogic logic; File Size136KB，28 Pages; ManufacturerNXP; Websitehttps://www.nxp.com; Environmental Compliance

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PCA9545CPW Overview

4-channel I2C switch with interrupt logic and reset

PCA9545CPW Parametric

Parameter Name	Attribute value
Is it lead-free?	Lead free
Is it Rohs certified?	conform to
Maker	NXP
Parts packaging code	TSSOP
package instruction	4.40 MM, PLASTIC, MO-153, SOT360-1, TSSOP-20
Contacts	20
Reach Compliance Code	compli
Other features	ALSO OPERATES WITH 4.5 TO 5.5V SUPPLY
series	9545
JESD-30 code	R-PDSO-G20
JESD-609 code	e4
length	6.5 mm
Logic integrated circuit type	MULTIPLEXER
Humidity sensitivity level	1
Number of functions	1
Number of entries	4
Output times	1
Number of terminals	20
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Output characteristics	OPEN-DRAIN
Output polarity	TRUE
Package body material	PLASTIC/EPOXY
encapsulated code	TSSOP
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	260
propagation delay (tpd)	0.3 ns
Certification status	Not Qualified
Maximum seat height	1.1 mm
Maximum supply voltage (Vsup)	3.6 V
Minimum supply voltage (Vsup)	2.3 V
Nominal supply voltage (Vsup)	3.3 V
surface mount	YES
Temperature level	INDUSTRIAL
Terminal surface	Nickel/Palladium/Gold (Ni/Pd/Au)
Terminal form	GULL WING
Terminal pitch	0.65 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	30
width	4.4 mm

User Manual

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PCA9545A/45B/45C

4-channel I

C-bus switch with interrupt logic and reset

Rev. 07 — 19 June 2009

Product data sheet

1. General description

The PCA9545A/45B/45C is a quad bidirectional translating switch controlled via the

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 PCA9545A/45B/45C to recover from a situation

where one of the downstream I

C-buses is stuck in a LOW state. Pulling the RESET pin

LOW resets the I

C-bus 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

pin can be used to limit

the maximum high voltage which will be passed by the PCA9545A/45B/45C. 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.

The PCA9545A, PCA9545B and PCA9545C are identical except for the ﬁxed portion of

the slave address.

2. Features

1-of-4 bidirectional translating switches

C-bus 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

C-bus

Alternate address versions A, B and C allow up to a total of 12 devices on the bus for

larger systems or to resolve address conﬂicts

Channel selection via I

C-bus, in any combination

Power-up with all switch channels deselected

Low R

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

PCA9545CPW Related Products

	PCA9545CPW	PCA9545ABS	PCA9545BPW
Description	4-channel I2C switch with interrupt logic and reset	4-channel I2C switch with interrupt logic and reset	4-channel I2C switch with interrupt logic and reset
Is it Rohs certified?	conform to	conform to	conform to
Maker	NXP	NXP	NXP
Parts packaging code	TSSOP	QFN	TSSOP
package instruction	4.40 MM, PLASTIC, MO-153, SOT360-1, TSSOP-20	5 X 5 MM, 0.85 MM HEIGHT, PLASTIC, MO-220, SOT662-1, HVQFN-20	4.40 MM, PLASTIC, MO-153, SOT360-1, TSSOP-20
Contacts	20	20	20
Reach Compliance Code	compli	compli	compli
Other features	ALSO OPERATES WITH 4.5 TO 5.5V SUPPLY	ALSO OPERATES WITH 4.5 TO 5.5V SUPPLY	ALSO OPERATES WITH 4.5 TO 5.5V SUPPLY
series	9545	9545	9545
JESD-30 code	R-PDSO-G20	S-PQCC-N20	R-PDSO-G20
JESD-609 code	e4	e4	e4
length	6.5 mm	5 mm	6.5 mm
Logic integrated circuit type	MULTIPLEXER	MULTIPLEXER	MULTIPLEXER
Humidity sensitivity level	1	1	1
Number of functions	1	1	1
Number of entries	4	4	4
Output times	1	1	1
Number of terminals	20	20	20
Maximum operating temperature	85 °C	85 °C	85 °C
Minimum operating temperature	-40 °C	-40 °C	-40 °C
Output characteristics	OPEN-DRAIN	OPEN-DRAIN	OPEN-DRAIN
Output polarity	TRUE	TRUE	TRUE
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	TSSOP	HVQCCN	TSSOP
Package shape	RECTANGULAR	SQUARE	RECTANGULAR
Package form	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	260	260	260
propagation delay (tpd)	0.3 ns	0.3 ns	0.3 ns
Certification status	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	1.1 mm	1 mm	1.1 mm
Maximum supply voltage (Vsup)	3.6 V	3.6 V	3.6 V
Minimum supply voltage (Vsup)	2.3 V	2.3 V	2.3 V
Nominal supply voltage (Vsup)	3.3 V	3.3 V	3.3 V
surface mount	YES	YES	YES
Temperature level	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
Terminal surface	Nickel/Palladium/Gold (Ni/Pd/Au)	Nickel/Palladium/Gold (Ni/Pd/Au)	Nickel/Palladium/Gold (Ni/Pd/Au)
Terminal form	GULL WING	NO LEAD	GULL WING
Terminal pitch	0.65 mm	0.65 mm	0.65 mm
Terminal location	DUAL	QUAD	DUAL
Maximum time at peak reflow temperature	30	30	30
width	4.4 mm	5 mm	4.4 mm
Is it lead-free?	Lead free	Lead free	-

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