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I/O Expander. PCA9554A Datasheet

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I/O Expander. PCA9554A Datasheet






PCA9554A Expander. Datasheet pdf. Equivalent




PCA9554A Expander. Datasheet pdf. Equivalent





Part

PCA9554A

Description

Remote 8-Bit I2C and SMBus I/O Expander



Feature


Product Folder Sample & Buy Technical Documents Tools & Software Support & Community PCA9554A SCPS127E – SEPTEM BER 2006 – REVISED JUNE 2014 PCA9554A Remote 8-Bit I2C and SMBus I/O Expande r With Interrupt Output and Configurati on Registers 1 Features •1 I2C to Pa rallel Port Expander • Open-Drain Act ive-Low Interrupt Output • Operating Power-Supply Voltage Range o.
Manufacture

Texas Instruments

Datasheet
Download PCA9554A Datasheet


Texas Instruments PCA9554A

PCA9554A; f 2.3 V to 5.5 V • 5-V Tolerant I/Os 400-kHz Fast I2C Bus • Three Hardw are Address Pins Allow up to Eight Devi ces on the I2C/SMBus • Input/Output C onfiguration Register • Polarity Inve rsion Register • Internal Power-On Re set • Power-Up With All Channels Conf igured as Inputs • No Glitch on Power Up • Latched Outputs With High-Curre nt Drive Maximum Capability for Dire.


Texas Instruments PCA9554A

ctly Driving LEDs • Latch-Up Performan ce Exceeds 100 mA Per JESD 78, Class II • ESD Protection Exceeds JESD 22 – 2000-V Human-Body Model (A114-A) – 2 00-V Machine Model (A115-A) – 1000-V Charged-Device Model (C101) 2 Descript ion This 8-bit I/O expander for the two -line bidirectional bus (I2C) is design ed for 2.3-V to 5.5-V VCC operation. It provides general-purpose re.


Texas Instruments PCA9554A

mote I/O expansion for most microcontrol ler families via the I2C interface [ser ial clock (SCL), serial data (SDA)]. Th e PCA9554A consists of one 8-bit Config uration (input or output selection), In put, Output, and Polarity Inversion (ac tive high or active low) registers. At power on, the I/Os are configured as in puts with a weak pullup to VCC. However , the system maste.

Part

PCA9554A

Description

Remote 8-Bit I2C and SMBus I/O Expander



Feature


Product Folder Sample & Buy Technical Documents Tools & Software Support & Community PCA9554A SCPS127E – SEPTEM BER 2006 – REVISED JUNE 2014 PCA9554A Remote 8-Bit I2C and SMBus I/O Expande r With Interrupt Output and Configurati on Registers 1 Features •1 I2C to Pa rallel Port Expander • Open-Drain Act ive-Low Interrupt Output • Operating Power-Supply Voltage Range o.
Manufacture

Texas Instruments

Datasheet
Download PCA9554A Datasheet




 PCA9554A
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PCA9554A
SCPS127E – SEPTEMBER 2006 – REVISED JUNE 2014
PCA9554A Remote 8-Bit I2C and SMBus I/O Expander With Interrupt Output and
Configuration Registers
1 Features
1 I2C to Parallel Port Expander
• Open-Drain Active-Low Interrupt Output
• Operating Power-Supply Voltage Range of 2.3 V
to 5.5 V
• 5-V Tolerant I/Os
• 400-kHz Fast I2C Bus
• Three Hardware Address Pins Allow up to Eight
Devices on the I2C/SMBus
• Input/Output Configuration Register
• Polarity Inversion Register
• Internal Power-On Reset
• Power-Up With All Channels Configured as Inputs
• No Glitch on Power Up
• Latched Outputs With High-Current Drive
Maximum Capability for Directly Driving LEDs
• Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
• ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
2 Description
This 8-bit I/O expander for the two-line bidirectional
bus (I2C) is designed for 2.3-V to 5.5-V VCC
operation. It provides general-purpose remote I/O
expansion for most microcontroller families via the I2C
interface [serial clock (SCL), serial data (SDA)].
The PCA9554A consists of one 8-bit Configuration
(input or output selection), Input, Output, and Polarity
Inversion (active high or active low) registers. At
power on, the I/Os are configured as inputs with a
weak pullup to VCC. However, the system master can
enable the I/Os as either inputs or outputs by writing
to the I/O configuration bits. The data for each input
or output is kept in the corresponding Input or Output
register. The polarity of the Input Port register can be
inverted with the Polarity Inversion register. All
registers can be read by the system master.
The system master can reset the PCA9554A in the
event of a timeout or other improper operation by
utilizing the power-on reset feature, which puts the
registers in their default state and initializes the
I2C/SMBus state machine.
The PCA9554A open-drain interrupt (INT) output is
activated when any input state differs from its
corresponding Input Port register state and is used to
indicate to the system master that an input state has
changed.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
SSOP (16)
6.20 mm × 5.30 mm
PCA9554A
VQFN (16)
4.00 mm × 4.00 mm
QFN (16)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
DB, DBQ, DGV, DW,
OR PW PACKAGE
(TOP VIEW)
RGV PACKAGE
(TOP VIEW)
RGT PACKAGE
(TOP VIEW)
A0
A1
A2
P0
P1
P2
P3
GND
1
2
3
4
5
6
7
8
16 VCC
15 SDA
14 SCL
13 INT
12 P7
11 P6
10 P5
9 P4
16 15 14 13
A2 1
12 SCL
P0 2
11 INT
P1 3
10 P7
P2 4
9 P6
567 8
16 15 14 13
A2 1
12 SCL
P0 2
11 INT
P1 3
10 P7
P2 4
9 P6
567 8
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.




 PCA9554A
PCA9554A
SCPS127E – SEPTEMBER 2006 – REVISED JUNE 2014
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Description ............................................................. 1
3 Revision History..................................................... 2
4 Description (Continued) ........................................ 3
5 Pin Configuration And Functions ........................ 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ..................................... 4
6.2 Handling Ratings....................................................... 4
6.3 Recommended Operating Conditions....................... 4
6.4 Electrical Characteristics........................................... 5
6.5 I2C Interface Timing Requirements........................... 6
6.6 Switching Characteristics .......................................... 6
6.7 Typical Characteristics .............................................. 7
7 Parameter Measurement Information ................ 10
8 Detailed Description ............................................ 13
8.1 Functional Block Diagram ....................................... 13
8.2 Device Functional Modes........................................ 14
8.3 Programming........................................................... 15
9 Application And Implementation........................ 21
9.1 Typical Application ................................................. 21
10 Power Supply Recommendations ..................... 23
10.1 Power-On Reset Errata......................................... 23
11 Device and Documentation Support ................. 23
11.1 Trademarks ........................................................... 23
11.2 Electrostatic Discharge Caution ............................ 23
11.3 Glossary ................................................................ 23
12 Mechanical, Packaging, and Orderable
Information ........................................................... 23
3 Revision History
Changes from Revision D (August 2008) to Revision E
Page
• Added Interrupt Errata section. ............................................................................................................................................ 15
• Added Power-On Reset Errata section. .............................................................................................................................. 23
2 Submit Documentation Feedback
Product Folder Links: PCA9554A
Copyright © 2006–2014, Texas Instruments Incorporated




 PCA9554A
www.ti.com
PCA9554A
SCPS127E – SEPTEMBER 2006 – REVISED JUNE 2014
4 Description (Continued)
INT can be connected to the interrupt input of a microcontroller. By sending an interrupt signal on this line, the
remote I/O can inform the microcontroller if there is incoming data on its ports without having to communicate via
the I2C bus. Thus, the PCA9554A can remain a simple slave device.
The device's outputs (latched) have high-current drive capability for directly driving LEDs and low current
consumption.
Three hardware pins (A0, A1, and A2) are used to program and vary the fixed I2C address and allow up to eight
devices to share the same I2C bus or SMBus.
The PCA9554A is pin-to-pin and I2C address compatible with the PCF8574A. However, software changes are
required, due to the enhancements in the PCA9554A over the PCF8574A.
The PCA9554A and PCA9554 are identical except for their fixed I2C address. This allows for up to 16 of these
devices (8 of each) on the same I2C/SMBus.
5 Pin Configuration And Functions
DB, DBQ, DGV, DW,
OR PW PACKAGE
(TOP VIEW)
RGV PACKAGE
(TOP VIEW)
RGT PACKAGE
(TOP VIEW)
A0
A1
A2
P0
P1
P2
P3
GND
1
2
3
4
5
6
7
8
16 VCC
15 SDA
14 SCL
13 INT
12 P7
11 P6
10 P5
9 P4
16 15 14 13
A2 1
12 SCL
P0 2
11 INT
P1 3
10 P7
P2 4
9 P6
567 8
16 15 14 13
A2 1
12 SCL
P0 2
11 INT
P1 3
10 P7
P2 4
9 P6
567 8
NAME
A0
A1
A2
P0
P1
P2
P3
GND
P4
P5
P6
P7
INT
SCL
SDA
VCC
PIN
QSOP (DBQ)
SOIC (DW),
SSOP (DB),
TSSOP (PW), AND
TVSOP (DGV)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin Functions
QFN (RGT AND
RGV)
DESCRIPTION
15 Address input. Connect directly to VCC or ground.
16 Address input. Connect directly to VCC or ground.
1 Address input. Connect directly to VCC or ground.
2 P-port input/output. Push-pull design structure.
3 P-port input/output. Push-pull design structure.
4 P-port input/output. Push-pull design structure.
5 P-port input/output. Push-pull design structure.
6 Ground
7 P-port input/output. Push-pull design structure.
8 P-port input/output. Push-pull design structure.
9 P-port input/output. Push-pull design structure.
10 P-port input/output. Push-pull design structure.
11 Interrupt output. Connect to VCC through a pullup resistor.
12 Serial clock bus. Connect to VCC through a pullup resistor.
13 Serial data bus. Connect to VCC through a pullup resistor.
14 Supply voltage
Copyright © 2006–2014, Texas Instruments Incorporated
Product Folder Links: PCA9554A
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