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PCA9674; PCA9674A: Remote 8-bit I/O expander for Fm+ I²C-bus with interrupt

The PCA9674 and PCA9674A provides general purpose remote I/O expansion via the two-line bidirectional I²C‑bus (serial clock (SCL), serial data (SDA)).

The devices consist of eight quasi-bidirectional ports, 1 MHz I²C‑bus Fast-mode Plus (Fm+) family interface, with high speed data transfer it can support PWM dimming of LEDs, and higher I²C‑bus drive 30 mA for more devices can be on the bus without the need for bus buffers. Three hardware address inputs and interrupt output operating between 2.3 V and 5.5 V. The quasi-bidirectional port can be independently assigned as an input to monitor interrupt status or keypads, or as an output to activate indicator devices such as LEDs. The system master can read from the input port or write to the output port through a single register.

The low current consumption of 4.5 μA (typical, static) is great for mobile applications and the latched output ports have 25 mA high current sink drive capability for directly driving LEDs.

The PCA9674 and PCA9674A are identical except for the different, non-overlapping slave address. The three hardware selectable address pins can be decode to 64 addresses for the PCA9674 and 62 addresses for the PCA9674A, so there can be up to 126 of these I/O expanders PCA9674/74A together on the same I²C‑bus without the need for bus buffers, supporting up to 1008 I/Os (for example, 1008 LEDs).

The active LOW open-drain interrupt output (INT) can be connected to the interrupt logic of the microcontroller and is activated when any input state differs from its corresponding input port register state. It is used to indicate to the microcontroller that an input state has changed and the device needs to be interrogated without the microcontroller continuously polling the input register via the I²C‑bus.

The internal Power-On Reset (POR) initializes the I/Os as inputs with a weak internal pull-up 100 μA current source.

Outline 3d SOT403-1

Data Sheets (1)

Application Notes (3)

Users Guides (4)

Brochures (3)

Package Information (3)

Packing (3)

Supporting Information (3)

IBIS Model

• PCA9674 IBIS model (REV 1.0) ZIP PCA9674 8/13/2014

Ordering Information

Package Information

Product ID	Package Description	Outline Version	Reflow/Wave Soldering	Packing	Product Status	Part NumberOrdering code(12NC)	Marking	Chemical Content	RoHS / Pb Free / RHF	LeadFree Conversion Date	EFR	IFR(FIT)	MTBF(hour)	MSL	MSL LF
PCA9674APW		SOT403-1	SSOP-TSSOP-VSO-WAVE	Reel 13" Q1/T1	Active	PCA9674APW,118 (9352 827 43118)	9674A	PCA9674APW		Always Pb-free	0.0	2.0	5E8	1	1
				Bulk Pack	Active	PCA9674APW,112 (9352 827 43112)	9674A	PCA9674APW		Always Pb-free	0.0	2.0	5E8	1	1
PCA9674AD		SOT162-1	SO-SOJ-REFLOW SO-SOJ-WAVE SO-SOJ-REFLOW SO-SOJ-WAVE	Reel 13" Q1/T1 in Drypack	Active	PCA9674AD,518 (9352 827 41518)	PCA9674AD	PCA9674AD		Always Pb-free	0.0	2.0	5E8	1	2
				Tube in Drypack	Active	PCA9674AD,512 (9352 827 41512)	PCA9674AD	PCA9674AD		Always Pb-free	0.0	2.0	5E8	1	2
PCA9674PW		SOT403-1	SSOP-TSSOP-VSO-WAVE	Reel 13" Q1/T1	Active	PCA9674PW,118 (9352 827 35118)	PCA9674	PCA9674PW		Always Pb-free	0.0	2.0	5E8	1	1
				Bulk Pack	Active	PCA9674PW,112 (9352 827 35112)	PCA9674	PCA9674PW		Always Pb-free	0.0	2.0	5E8	1	1
PCA9674BS		SOT758-1		Reel 13" Q1/T1	Active	PCA9674BS,118 (9352 827 38118)	674	PCA9674BS		Always Pb-free	0.0	2.0	5E8	1	1
PCA9674D		SOT162-1	SO-SOJ-REFLOW SO-SOJ-WAVE SO-SOJ-REFLOW SO-SOJ-WAVE	Reel 13" Q1/T1 in Drypack	Active	PCA9674D,518 (9352 827 36518)	PCA9674D	PCA9674D		Always Pb-free	0.0	2.0	5E8	1	2
				Tube in Drypack	Active	PCA9674D,512 (9352 827 36512)	PCA9674D	PCA9674D		Always Pb-free	0.0	2.0	5E8	1	2
PCA9674ABS		SOT758-1		Reel 13" Q1/T1	Active	PCA9674ABS,118 (9352 827 39118)	74A	PCA9674ABS		Always Pb-free	0.0	2.0	5E8	1	1