PCA9538 Status: ACTIVE

Remote 8-Bit I2C and SMBus Low-Power I/O Expander With Interrupt Output, Reset, and Config Registers

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Datasheet

Remote 8-Bit I2C and SMBus Low-Power I/O Expander (Rev. E) (PDF 619 KB)
17 Jun 2008
Datasheet Errata for PCA9557 and PCA6107 Device Types (Rev. A) (PDF 86 KB) 952 views
04 Aug 2008

	PCA9538
Interrupt Output	Yes
Reset Input	Yes
Technology Family	I2C,SMBus
fSCLK(Max)(MHz)	0.1,0.4
VCC(Min)(V)	2.3
VCC(Max)(V)	5.5
Pin/Package	16SSOP, 16TSSOP, 16TVSOP, 16SOIC
Operating Temp Range(Celsius)	-40 to 85
Max Frequency(kHz)	400
I2C Address	1110 0xx
# of I/Os	8
Vcc range(V)	2.3 to 5.5
Low Power	Yes
Configuration Registers	Yes
5V Tolerant I/O	Yes
Push–Pull I/O Type	Yes
	Samples
	Inventory

Customers Who Evaluated This Product Also Evaluated

PCA9539: Remote 16-Bit I2C And SMBus, Low-Power I/O Expander With Interrupt Output, Reset & Config. Registers
PCA9534: Remote 8-Bit I2C and Low-Power I/O Expander with Interrupt Output and Configuration Registers
PCA9557: Remote 8-Bit I2C and SMBus Low-Power I/O Expander with Reset and Configuration Registers
MAX3232: 3-V to 5.5-V Multichannel RS-232 Line Driver/Receiver

Product Information

Features

Low Standby Current Consumption of 1 µA Max
I²C to Parallel Port Expander
Open-Drain Active-Low Interrupt Output
Active-Low Reset Input
Operating Power-Supply Voltage Range of 2.3 V to 5.5 V
5-V Tolerant I/O Ports
400-kHz Fast I²C Bus
Two Hardware Address Pins Allow up to Four Devices on the I²C/SMBus
Input/Output Configuration Register
Polarity Inversion Register
Power-Up With All Channels Configured as Inputs
No Glitch on Power Up
Noise Filter on SCL/SDA Inputs
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 PCA9538 consists of one 8-bit Configuration (input or output selection), Input Port, Output Port, and Polarity Inversion (active high or active low) registers. At power on, the I/Os are configured as inputs. 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 Port or Output Port 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 PCA9538 in the event of a timeout or other improper operation by asserting a low in the RESET input. The power-on reset puts the registers in their default state and initializes the I²C/SMBus state machine. The RESET pin causes the same reset/initialization to occur without powering down the part.

The PCA9538 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 PCA9538 can remain a simple slave device.

The device outputs (latched) have high-current drive capability for directly driving LEDs. It has low current consumption.

Two hardware pins (A0 and A1) are used to program and vary the fixed I²C address and allow up to four devices to share the same I²C bus or 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
PCA9538DB	ACTIVE	-40 to 85	1.05 \| 1ku	SSOP (DB) \| 16	View	80 \| TUBE		Purchase Samples
PCA9538DBG4	ACTIVE	-40 to 85	1.05 \| 1ku	SSOP (DB) \| 16	View	80 \| TUBE		Purchase Samples
PCA9538DBR	ACTIVE	-40 to 85	1.00 \| 1ku	SSOP (DB) \| 16	View	2000 \| LARGE T&R
PCA9538DBRG4	ACTIVE	-40 to 85	1.00 \| 1ku	SSOP (DB) \| 16	View	2000 \| LARGE T&R
PCA9538DGVR	ACTIVE	-40 to 85	1.00 \| 1ku	TVSOP (DGV) \| 16		2000 \| LARGE T&R
PCA9538DGVRG4	ACTIVE	-40 to 85	1.00 \| 1ku	TVSOP (DGV) \| 16		2000 \| LARGE T&R
PCA9538DW	ACTIVE	-40 to 85	1.05 \| 1ku	SOIC (DW) \| 16	View	40 \| TUBE		Purchase Samples
PCA9538DWG4	ACTIVE	-40 to 85	1.05 \| 1ku	SOIC (DW) \| 16	View	40 \| TUBE	Purchase Samples
PCA9538DWR	ACTIVE	-40 to 85	1.00 \| 1ku	SOIC (DW) \| 16	View	2000 \| LARGE T&R
PCA9538DWRG4	ACTIVE	-40 to 85	1.00 \| 1ku	SOIC (DW) \| 16	View	2000 \| LARGE T&R
PCA9538PW	ACTIVE	-40 to 85	1.05 \| 1ku	TSSOP (PW) \| 16	View	90 \| TUBE		Purchase Samples
PCA9538PWG4	ACTIVE	-40 to 85	1.05 \| 1ku	TSSOP (PW) \| 16	View	90 \| TUBE		Purchase Samples
PCA9538PWR	ACTIVE	-40 to 85	1.00 \| 1ku	TSSOP (PW) \| 16	View	2000 \| LARGE T&R
PCA9538PWRG4	ACTIVE	-40 to 85	1.00 \| 1ku	TSSOP (PW) \| 16	View	2000 \| 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 11:45 AM GMT, 20 Nov 2009
Region	Company	In Stock	Purchase
TI Lead Time*: 15 WeeksPCA9538DB
Americas	Arrow	640
Americas	Rochester Electronics	>1k
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksPCA9538DBG4
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksPCA9538DBR
Americas	Arrow	>1k
Americas	Rochester Electronics	>1k
Worldwide	DigiKey	>1k
TI Lead Time*: 15 WeeksPCA9538DBRG4
Worldwide	DigiKey	Available
TI Lead Time*: 14 WeeksPCA9538DGVR
Americas	Arrow	>1k
Worldwide	DigiKey	894
TI Lead Time*: 14 WeeksPCA9538DGVRG4
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksPCA9538DW
Americas	Newark	232
Americas	Rochester Electronics	>1k
Asia	Farnell Asia	232
Asia	WPI	33
Europe	Avnet-SILICA	160
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksPCA9538DWG4
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksPCA9538DWR
Americas	Arrow	>1k
	Newark	>1k
	Rochester Electronics	>1k
Asia	Farnell Asia	>1k
Asia	WPI	>1k
Europe	Avnet-SILICA	>1k
Worldwide	DigiKey	840
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 15 WeeksPCA9538DWRG4
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksPCA9538PW
Americas	Arrow	776
	Newark	275
	Rochester Electronics	199
Asia	WPI	30
Europe	Compel	355
Worldwide	DigiKey	Available
Worldwide	Mouser Electronics	7
TI Lead Time*: 20 WeeksPCA9538PWG4
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksPCA9538PWR
Americas	Newark	>1k
Asia	Farnell Asia	>1k
Worldwide	DigiKey	>1k
Worldwide	Mouser Electronics	673
TI Lead Time*: 20 WeeksPCA9538PWRG4
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
PCA9538DB	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9538DBG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9538DBR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9538DBRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9538DGVR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9538DGVRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9538DW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9538DWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9538DWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9538DWRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9538PW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9538PWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9538PWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9538PWRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	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 PCA9538

Datasheet

Remote 8-Bit I2C and SMBus Low-Power I/O Expander (Rev. E) (PDF, 619 KB)
17 Jun 2008

Application Notes

Shelf-Life Evaluation of Lead-Free Component Finishes (HTM, 8 KB) 27183 views
24 May 2004 Read Abstract
Understanding and Interpreting Standard-Logic Data Sheets (Rev. B) (HTM, 8 KB) 21623 views
28 May 2003 Read Abstract
Programming Fun Lights With TI's TCA6507 (HTM, 8 KB) 3555 views
30 Nov 2007 Read Abstract

Selection Guides

Logic Guide 2009 (Rev. Z) (PDF, 4263 KB) 90161 views
23 Jul 2009
I2C Guide (Rev. B) (PDF, 2830 KB) 13396 views
12 Aug 2009

Errata

Datasheet Errata for PCA9557 and PCA6107 Device Types (Rev. A) (PDF, 86 KB) 952 views
04 Aug 2008

Simulation Models

IBIS Model
- PCA9538 IBIS Model (Rev. A) (Multiple File Format) 77 views
  15 Feb 2008 Read Abstract

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PCA9534	Remote 8-Bit I2C and Low-Power I/O Expander with Interrupt Output and Configuration Registers	I2C (SL)-I2C IO EXPANDERS	TI customers also evaluated this product.
PCA9557	Remote 8-Bit I2C and SMBus Low-Power I/O Expander with Reset and Configuration Registers	I2C (SL)-I2C IO EXPANDERS	TI customers also evaluated this product.
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PCA9538 Status: ACTIVE

Remote 8-Bit I2C and SMBus Low-Power I/O Expander With Interrupt Output, Reset, and Config Registers

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