PCA9674; PCA9674A
Remote 8-bit I/O expander for Fm+ I
2
C-bus with interrupt
Rev. 7 — 30 May 2013
Product data sheet
1. General description
The PCA9674/74A provides general-purpose remote I/O expansion via the two-wire
bidirectional I
2
C-bus (serial clock (SCL), serial data (SDA)).
The devices consist of eight quasi-bidirectional ports, 1 MHz I
2
C-bus Fast-mode Plus
(Fm+) family interface, with high speed data transfer it can support PWM dimming of
LEDs, and higher I
2
C-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
A
(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 I
2
C-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 I
2
C-bus.
The internal Power-On Reset (POR) initializes the I/Os as inputs with a weak internal
pull-up 100
A
current source.
2. Features and benefits
I
2
C-bus to parallel port expander
1 MHz I
2
C-bus interface (Fast-mode Plus I
2
C-bus)
SDA with 30 mA sink capability for 4000 pF buses
Operating supply voltage 2.3 V to 5.5 V with 5.5 V tolerant I/Os held to V
DD
with
100
A
current source
8-bit remote I/O pins that default to inputs at power-up
Latched outputs with 25 mA sink capability for directly driving LEDs
Total package sink capability of 200 mA
NXP Semiconductors
PCA9674; PCA9674A
Remote 8-bit I/O expander for Fm+ I
2
C-bus with interrupt
Active LOW open-drain interrupt output
Sixty-four programmable slave addresses using three address pins
(PCA9674A - sixty-two)
Readable device ID (manufacturer, device type, and revision)
Software Reset pushes the device back to Power-On Reset state
Low standby current (4.5
A
typical)
40 C
to +85
C
operation
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
Packages offered: SO16, TSSOP16, HVQFN16
3. Applications
LED signs and displays
Servers
Key pads
Industrial control
Medical equipment
PLCs
Cellular telephones
Mobile devices
Gaming machines
Instrumentation and test measurement
PCA9674_PCA9674A
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 7 — 30 May 2013
2 of 40
NXP Semiconductors
PCA9674; PCA9674A
Remote 8-bit I/O expander for Fm+ I
2
C-bus with interrupt
4. Ordering information
Table 1.
Ordering information
Topside
mark
674
74A
PCA9674D
PCA9674AD
PCA9674
9674A
TSSOP16
plastic thin shrink small outline package; 16 leads;
body width 4.4 mm
SOT403-1
SO16
Package
Name
HVQFN16
Description
Version
plastic thermal enhanced very thin quad flat package; no leads; SOT758-1
16 terminals; body 3
3
0.85 mm
plastic small outline package; 16 leads; body width 7.5 mm
SOT162-1
Type number
PCA9674BS
PCA9674ABS
PCA9674D
PCA9674AD
PCA9674PW
PCA9674APW
4.1 Ordering options
Table 2.
Ordering options
Orderable
part number
PCA9674BS,118
PCA9674ABS,118
PCA9674D,512
PCA9674D,518
PCA9674AD
PCA9674AD,512
PCA9674AD,518
PCA9674PW
PCA9674PW,112
PCA9674PW,118
PCA9674APW
PCA9674APW,112
PCA9674APW,118
Package
Packing method
Minimum Temperature range
order
quantity
6000
6000
1920
1000
1920
1000
2400
2500
2400
2500
T
amb
=
40 C
to +85
C
T
amb
=
40 C
to +85
C
T
amb
=
40 C
to +85
C
T
amb
=
40 C
to +85
C
T
amb
=
40 C
to +85
C
T
amb
=
40 C
to +85
C
T
amb
=
40 C
to +85
C
T
amb
=
40 C
to +85
C
T
amb
=
40 C
to +85
C
T
amb
=
40 C
to +85
C
Type number
PCA9674BS
PCA9674ABS
PCA9674D
HVQFN16
HVQFN16
SO16
SO16
SO16
SO16
TSSOP16
TSSOP16
TSSOP16
TSSOP16
Reel 13” Q1/T1
*standard mark SMD
Reel 13” Q1/T1
*standard mark SMD
Standard marking *
tube dry pack
Reel 13” Q1/T1
*standard mark SMD dry pack
Standard marking *
tube dry pack
Reel 13” Q1/T1
*standard mark SMD dry pack
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
PCA9674_PCA9674A
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 7 — 30 May 2013
3 of 40
NXP Semiconductors
PCA9674; PCA9674A
Remote 8-bit I/O expander for Fm+ I
2
C-bus with interrupt
6. Pinning information
6.1 Pinning
AD0
AD1
AD2
P0
P1
P2
P3
V
SS
1
2
3
4
5
6
7
8
002aac111
16 V
DD
15 SDA
14 SCL
13 INT
12 P7
11 P6
10 P5
9
P4
AD0
AD1
AD2
P0
P1
P2
P3
V
SS
1
2
3
4
5
6
7
8
002aac113
16 V
DD
15 SDA
14 SCL
13 INT
12 P7
11 P6
10 P5
9
P4
PCA9674D
PCA9674AD
PCA9674PW
PCA9674APW
Fig 3.
Pin configuration for SO16
Fig 4.
PCA9674BS
PCA9674ABS
Pin configuration for TSSOP16
terminal 1
index area
AD2
P0
P1
P2
1
2
3
4
5
6
7
8
13 SDA
12 SCL
11 INT
10 P7
9
P6
P5
16 AD1
15 AD0
V
SS
P3
P4
14 V
DD
002aac114
Transparent top view
Fig 5.
Pin configuration for HVQFN16
6.2 Pin description
Table 3.
Symbol
AD0
AD1
AD2
P0
P1
P2
P3
V
SS
P4
PCA9674_PCA9674A
Pin description
Pin
SO16, TSSOP16
1
2
3
4
5
6
7
8
9
HVQFN16
15
16
1
2
3
4
5
6
[1]
7
address input 0
address input 1
address input 2
quasi-bidirectional I/O 0
quasi-bidirectional I/O 1
quasi-bidirectional I/O 2
quasi-bidirectional I/O 3
supply ground
quasi-bidirectional I/O 4
© NXP B.V. 2013. All rights reserved.
Description
All information provided in this document is subject to legal disclaimers.
Product data sheet
Rev. 7 — 30 May 2013
5 of 40
MCU
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