PCA9554A Status: ACTIVE

Remote 8-Bit I2C and SMBus I/O Expander with Interrupt Output and Configuration Registers

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Datasheet

Remote 8-Bit I2C and SMBus I/O Expander (Rev. D) (PDF 1089 KB)
05 Aug 2008
Datasheet Errata for PCA9557 and PCA6107 Device Types (Rev. A) (PDF 86 KB) 925 views
04 Aug 2008

	PCA9554A
No. of Outputs	8
Interrupt Output	Yes
fSCLK(Max)(MHz)	0.1,0.4
VCC(Min)(V)	2.3
VCC(Max)(V)	5.5
Pin/Package	16QFN, 16SOIC, 16SSOP, 16TSSOP, 16TVSOP
Operating Temp Range(Celsius)	-40 to 85
Max Frequency(kHz)	400
I2C Address	0111 xxx
# of I/Os	8
Vcc range(V)	2.3 to 5.5
Configuration Registers	Yes
5V Tolerant I/O	Yes
Push–Pull I/O Type	Yes
	Samples
	Inventory

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Product Information

Features

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)

DESCRIPTION/ORDERING INFORMATION

This 8-bit I/O expander for the two-line bidirectional bus (I²C) is designed for 2.3-V to 5.5-V V_CC 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 V_CC. 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.

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.

Pricing / Packaging / CAD Design Tools / Samples

			Price	Packaging			CAD Design Tools		Samples
Device	Status	Temp (^oC)	Price \| Quantity	Package \| Pins	Top Side Marking	Package QTY \| Package Carrier	Symbols	Footprints	Samples
PCA9554ADB	ACTIVE	-40 to 85	0.95 \| 1ku	SSOP (DB) \| 16	View	80 \| TUBE		Purchase Samples
PCA9554ADBG4	ACTIVE	-40 to 85	0.95 \| 1ku	SSOP (DB) \| 16	View	80 \| TUBE		Purchase Samples
PCA9554ADBR	ACTIVE	-40 to 85	0.85 \| 1ku	SSOP (DB) \| 16	View	2000 \| LARGE T&R
PCA9554ADBRG4	ACTIVE	-40 to 85	0.85 \| 1ku	SSOP (DB) \| 16	View	2000 \| LARGE T&R
PCA9554ADGVR	ACTIVE	-40 to 85	0.85 \| 1ku	TVSOP (DGV) \| 16		2000 \| LARGE T&R
PCA9554ADGVRG4	ACTIVE	-40 to 85	0.85 \| 1ku	TVSOP (DGV) \| 16		2000 \| LARGE T&R
PCA9554ADW	ACTIVE	-40 to 85	0.95 \| 1ku	SOIC (DW) \| 16	View	40 \| TUBE		Purchase Samples
PCA9554ADWG4	ACTIVE	-40 to 85	0.95 \| 1ku	SOIC (DW) \| 16	View	40 \| TUBE	Purchase Samples
PCA9554ADWR	ACTIVE	-40 to 85	0.85 \| 1ku	SOIC (DW) \| 16	View	2000 \| LARGE T&R
PCA9554ADWRG4	ACTIVE	-40 to 85	0.85 \| 1ku	SOIC (DW) \| 16	View	2000 \| LARGE T&R
PCA9554APW	ACTIVE	-40 to 85	0.95 \| 1ku	TSSOP (PW) \| 16	View	90 \| TUBE		Purchase Samples
PCA9554APWG4	ACTIVE	-40 to 85	0.95 \| 1ku	TSSOP (PW) \| 16	View	90 \| TUBE		Purchase Samples
PCA9554APWR	ACTIVE	-40 to 85	0.85 \| 1ku	TSSOP (PW) \| 16	View	2000 \| LARGE T&R
PCA9554APWRG4	ACTIVE	-40 to 85	0.85 \| 1ku	TSSOP (PW) \| 16	View	2000 \| LARGE T&R
PCA9554ARGTR	ACTIVE	-40 to 85	0.85 \| 1ku	QFN (RGT) \| 16	View	3000 \| LARGE T&R
PCA9554ARGTRG4	ACTIVE	-40 to 85	0.85 \| 1ku	QFN (RGT) \| 16	View	3000 \| LARGE T&R
PCA9554ARGVR	ACTIVE	-40 to 85	0.85 \| 1ku	QFN (RGV) \| 16	View	2500 \| LARGE T&R
PCA9554ARGVRG4	ACTIVE	-40 to 85	0.85 \| 1ku	QFN (RGV) \| 16	View	2500 \| LARGE T&R

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

Reported Distributor Inventory as of 11:35 AM GMT, 06 Nov 2009
Region	Company	In Stock	Purchase
TI Lead Time*: 11 WeeksPCA9554ADB
Americas	Arrow	690
	Avnet	229
	Rochester Electronics	>1k
Europe	Avnet-SILICA	140
Worldwide	DigiKey	Available
TI Lead Time*: 11 WeeksPCA9554ADBG4
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksPCA9554ADBR
Americas	Arrow	>1k
Americas	Rochester Electronics	>1k
Worldwide	DigiKey	>1k
TI Lead Time*: 15 WeeksPCA9554ADBRG4
Worldwide	DigiKey	Available
TI Lead Time*: 16 WeeksPCA9554ADGVR
Americas	Arrow	>1k
Americas	Rochester Electronics	>1k
Worldwide	DigiKey	718
TI Lead Time*: 16 WeeksPCA9554ADGVRG4
Worldwide	DigiKey	Available
TI Lead Time*: 11 WeeksPCA9554ADW
Americas	Arrow	320
Americas	Avnet	257
Asia	WPI	70
Europe	Avnet-SILICA	80
Worldwide	DigiKey	Available
Worldwide	Mouser Electronics	46
TI Lead Time*: 11 WeeksPCA9554ADWG4
Worldwide	DigiKey	Available
TI Lead Time*: 11 WeeksPCA9554ADWR
Americas	Arrow	>1k
Americas	Rochester Electronics	>1k
Asia	WPI	>1k
Europe	Avnet-SILICA	>1k
Worldwide	DigiKey	>1k
TI Lead Time*: 11 WeeksPCA9554ADWRG4
Worldwide	DigiKey	Available
TI Lead Time*: 14 WeeksPCA9554APW
Americas	Arrow	570
	Newark	298
	Rochester Electronics	890
Europe	Avnet-SILICA	630
Europe	Spoerle	360
Worldwide	DigiKey	Available
Worldwide	Mouser Electronics	323
TI Lead Time*: 14 WeeksPCA9554APWG4
Worldwide	DigiKey	Available
TI Lead Time*: 14 WeeksPCA9554APWR
Americas	Arrow	>1k
Europe	Avnet-SILICA	>1k
Worldwide	DigiKey	>1k
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 14 WeeksPCA9554APWRG4
Worldwide	DigiKey	Available
TI Lead Time*: 18 WeeksPCA9554ARGTR
Asia	WPI	>1k
Worldwide	DigiKey	670
TI Lead Time*: 18 WeeksPCA9554ARGTRG4
Worldwide	DigiKey	Available
TI Lead Time*: 17 WeeksPCA9554ARGVR
Americas	Arrow	>1k
Asia	WPI	>1k
Worldwide	DigiKey	>1k
TI Lead Time*: 17 WeeksPCA9554ARGVRG4
Worldwide	DigiKey	Available
View all Distributors

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

	Product Content				DPPM / MTBF / FIT Rate
Device	Eco Plan*	Lead / Ball Finish	MSL Rating / Peak Reflow	Details	Details
PCA9554ADB	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9554ADBG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9554ADBR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9554ADBRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9554ADGVR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9554ADGVRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9554ADW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9554ADWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9554ADWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9554ADWRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9554APW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9554APWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9554APWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9554APWRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9554ARGTR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
PCA9554ARGTRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
PCA9554ARGVR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
PCA9554ARGVRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

Most useful technical documents for PCA9554A

Datasheet

Remote 8-Bit I2C and SMBus I/O Expander (Rev. D) (PDF, 1089 KB)
05 Aug 2008

Application Notes

Shelf-Life Evaluation of Lead-Free Component Finishes (HTM, 8 KB) 26941 views
24 May 2004 Read Abstract
Understanding and Interpreting Standard-Logic Data Sheets (Rev. B) (HTM, 8 KB) 21328 views
28 May 2003 Read Abstract
Programming Fun Lights With TI's TCA6507 (HTM, 8 KB) 3455 views
30 Nov 2007 Read Abstract

Selection Guides

Logic Guide 2009 (Rev. Z) (PDF, 4263 KB) 88336 views
23 Jul 2009
I2C Guide (Rev. B) (PDF, 2830 KB) 12794 views
12 Aug 2009

Errata

Datasheet Errata for PCA9557 and PCA6107 Device Types (Rev. A) (PDF, 86 KB) 925 views
04 Aug 2008

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PCA9554A Status: ACTIVE

Remote 8-Bit I2C and SMBus I/O Expander with Interrupt Output and Configuration Registers

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