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PCF8575C Status: ACTIVE

Remote 16-Bit I2C and SMBus I/O Expander with Interrupt Output


      
         
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 PCF8575C
Voltage Nodes(V)5  
Interrupt OutputYes  
Reset InputNo  
fSCLK(Max)(MHz)0.4  
VCC(Min)(V)4.5  
VCC(Max)(V)5.5  
Pin/Package24SOIC, 24SSOP, 24SSOP/QSOP, 24TSSOP, 24TVSOP, 24VQFN  
Operating Temp Range(Celsius)-40 to 85  
Max Frequency(kHz)400  
I2C Address0100 xxx  
# of I/Os16  
Vcc range(V)4.5 to 5.5  
Open–Drain I/O TypeYes  
 Samples
 Inventory

Customers Who Evaluated This Product Also Evaluated

  • PCF8575: Remote 16-Bit I2C and SMBus I/O Expander with Interrupt Output
  • REF5050: Low Noise, Very Low Drift, Precision VOLTAGE REFERENCE
  • ADS1110: 16-Bit Delta-Sigma ADC with internal reference, PGA and oscillator. I2C Serial Interface
  • MSP430F149: 16-Bit Ultra-Low-Power Microcontroller, 60 kB Flash, 2KB RAM, 12 bit ADC, 2 USARTs, HW multiplier

Product Information

Features

  • Low Standby-Current Consumption of 10 µA Maximum
  • I2C to Parallel-Port Expander
  • Open-Drain Interrupt Output
  • Compatible With Most Microcontrollers
  • 400-kHz Fast I2C Bus
  • Address by Three Hardware Address Pins for Use of up to Eight Devices
  • Latched Outputs With High-Current Drive 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 16-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 4.5-V to 5.5-V VCC operation.

The PCF8575C provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface serial clock (SCL) and serial data (SDA).

The device features a 16-bit quasi-bidirectional input/output (I/O) port (P07-P00, P17-P10), including latched outputs with high-current drive capability for directly driving LEDs. Each quasi-bidirectional I/O can be used as an input or output without the use of a data-direction control signal. At power on, the I/Os are in 3-state mode. The strong pullup to VCC allows fast-rising edges into heavily loaded outputs. This device turns on when an output is written high and is switched off by the negative edge of SCL. The I/Os should be high before being used as inputs. After power on, as all the I/Os are set to 3-state, all of them can be used as inputs. Any change in setting of the I/Os as either inputs or outputs can be done with the write mode. If a high is applied externally to an I/O that has been written earlier to low, a large current (IOL) flows to GND.

The PCF8575C provides an open-drain interrupt (INT) output, which can be connected to the interrupt input of a microcontroller. An interrupt is generated by any rising or falling edge of the port inputs in the input mode. After time (tiv), the signal INT is valid. Resetting and reactivating the interrupt circuit is achieved when data on the port is changed to the original setting, or data is read from or written to the port that generated the interrupt. Resetting occurs in the read mode at the acknowledge (ACK) bit after the rising edge of the SCL signal or in the write mode at the ACK bit after the falling edge of the SCL signal. Interrupts that occur during the ACK clock pulse can be lost (or be very short), due to the resetting of the interrupt during this pulse. Each change of the I/Os after resetting is detected and is transmitted as INT. Reading from or writing to another device does not affect the interrupt circuit.

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 PCF8575C can remain a simple slave device.

Every data transmission to or from the PCF8575C must consist of an even number of bytes. The first data byte in every pair refers to port 0 (P07-P00), and the second data byte in every pair refers to port 1 (P17-P10). To write to the ports (output mode), the master first addresses the slave device, setting the last bit of the byte containing the slave address to logic 0. The PCF8575C acknowledges and the master sends the first data byte for P07-P00. After the first data byte is acknowledged by the PCF8575C, the second data byte (P17-P10) is sent by the master. Once again, the PCF8575C acknowledges the receipt of the data, after which this 16-bit data is presented on the port lines.

The number of data bytes that can be sent successively is not limited. After every two bytes, the previous data is overwritten. When the PCF8575C receives the pairs of data bytes, the first byte is referred to as P07-P00 and the second byte as P17-P10. The third byte is referred to as P07-P00, the fourth byte as P17-P10, and so on.

Before reading from the PCF8575C, all ports desired as input should be set to logic 1. To read from the ports (input mode), the master first addresses the slave device, setting the last bit of the byte containing the slave address to logic 1. The data bytes that follow on the SDA are the values on the ports. If the data on the input port changes faster than the master can read, this data may be lost.

When power is applied to VCC, an internal power-on reset holds the PCF8575C in a reset state until VCC has reached VPOR. At that time, the reset condition is released, and the device I2C-bus state machine initializes the bus to its default state.

The 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 fixed I2C address of the PCF8575C is the same as the PCF8575, PCF8574, PCA9535, and PCA9555, allowing up to eight of these devices, in any combination, to share the same I2C bus or SMBus.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
PCF8575CDBACTIVE-40 to 851.60 | 1kuSSOP (DB) | 24 View 60 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
PCF8575CDBE4ACTIVE-40 to 851.60 | 1kuSSOP (DB) | 24 View 60 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
PCF8575CDBG4ACTIVE-40 to 851.60 | 1kuSSOP (DB) | 24 View 60 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
PCF8575CDBQRACTIVE-40 to 851.45 | 1kuSSOP/QSOP (DBQ) | 24 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
PCF8575CDBQRE4ACTIVE-40 to 851.45 | 1kuSSOP/QSOP (DBQ) | 24 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
PCF8575CDBQRG4ACTIVE-40 to 851.45 | 1kuSSOP/QSOP (DBQ) | 24 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
PCF8575CDBRACTIVE-40 to 851.45 | 1kuSSOP (DB) | 24 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
PCF8575CDBRE4ACTIVE-40 to 851.45 | 1kuSSOP (DB) | 24 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
PCF8575CDBRG4ACTIVE-40 to 851.45 | 1kuSSOP (DB) | 24 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
PCF8575CDGVRACTIVE-40 to 851.45 | 1kuTVSOP (DGV) | 24  2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
PCF8575CDGVRE4ACTIVE-40 to 851.45 | 1kuTVSOP (DGV) | 24  2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
PCF8575CDGVRG4ACTIVE-40 to 851.45 | 1kuTVSOP (DGV) | 24  2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
PCF8575CDWACTIVE-40 to 851.60 | 1kuSOIC (DW) | 24 View 25 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
PCF8575CDWE4ACTIVE-40 to 851.60 | 1kuSOIC (DW) | 24 View 25 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
PCF8575CDWG4ACTIVE-40 to 851.60 | 1kuSOIC (DW) | 24 View 25 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
PCF8575CDWRACTIVE-40 to 851.45 | 1kuSOIC (DW) | 24 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
PCF8575CDWRE4ACTIVE-40 to 851.45 | 1kuSOIC (DW) | 24 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
PCF8575CDWRG4ACTIVE-40 to 851.45 | 1kuSOIC (DW) | 24 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
PCF8575CPWACTIVE-40 to 851.60 | 1kuTSSOP (PW) | 24 View 60 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
PCF8575CPWE4ACTIVE-40 to 851.60 | 1kuTSSOP (PW) | 24 View 60 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
PCF8575CPWG4ACTIVE-40 to 851.60 | 1kuTSSOP (PW) | 24 View 60 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
PCF8575CPWRACTIVE-40 to 851.45 | 1kuTSSOP (PW) | 24 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
PCF8575CPWRE4ACTIVE-40 to 851.45 | 1kuTSSOP (PW) | 24 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
PCF8575CPWRG4ACTIVE-40 to 851.45 | 1kuTSSOP (PW) | 24 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
PCF8575CRGERACTIVE-40 to 851.45 | 1kuVQFN (RGE) | 24 View 3000 | LARGE T&R Download CAD Format for this Symbol 
PCF8575CRGERG4ACTIVE-40 to 851.45 | 1kuVQFN (RGE) | 24 View 3000 | LARGE T&R Download CAD Format for this Symbol 

* 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 11:37 AM GMT, 08 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 11 WeeksPCF8575CDB
AmericasArrow 600
Rochester Electronics 202
AsiaFarnell Asia 20
EuropeAvnet-SILICA 810
WorldwideDigiKey  Available
Mouser Electronics 176
TI Lead Time*: 11 WeeksPCF8575CDBE4
AsiaFarnell Asia 687
EuropeFarnell 304
WorldwideDigiKey  Available
TI Lead Time*: 11 WeeksPCF8575CDBG4
EuropeEBV Elektronik 60
WorldwideDigiKey  Available
TI Lead Time*: 15 WeeksPCF8575CDBQR
AmericasArrow >1k
Avnet >1k
EuropeAvnet-SILICA >1k
WorldwideDigiKey >1k
TI Lead Time*: 15 WeeksPCF8575CDBQRE4
WorldwideDigiKey  Available
TI Lead Time*: 15 WeeksPCF8575CDBQRG4
WorldwideDigiKey  Available
TI Lead Time*: 11 WeeksPCF8575CDBR
AmericasArrow >1k
Rochester Electronics >1k
EuropeAvnet-SILICA >1k
WorldwideDigiKey >1k
Mouser Electronics >1k
TI Lead Time*: 11 WeeksPCF8575CDBRE4
WorldwideDigiKey  Available
TI Lead Time*: 11 WeeksPCF8575CDBRG4
WorldwideDigiKey  Available
TI Lead Time*: 15 WeeksPCF8575CDGVR
AmericasRochester Electronics >1k
WorldwideDigiKey >1k
Mouser Electronics >1k
TI Lead Time*: 15 WeeksPCF8575CDGVRE4
WorldwideDigiKey  Available
TI Lead Time*: 15 WeeksPCF8575CDGVRG4
WorldwideDigiKey  Available
TI Lead Time*: 11 WeeksPCF8575CDW
AmericasArrow 600
Newark 92
Rochester Electronics 288
AsiaWPI 48
EuropeArrow Northern Europe 225
Avnet-SILICA 300
WorldwideDigiKey  Available
Mouser Electronics 212
TI Lead Time*: 11 WeeksPCF8575CDWE4
AsiaFarnell Asia >1k
EuropeFarnell >1k
Spoerle 375
WorldwideDigiKey  Available
TI Lead Time*: 11 WeeksPCF8575CDWG4
EuropeEBV Elektronik 100
WorldwideDigiKey  Available
TI Lead Time*: 15 WeeksPCF8575CDWR
AmericasArrow >1k
EuropeAvnet-SILICA >1k
WorldwideDigiKey >1k
Mouser Electronics >1k
TI Lead Time*: 15 WeeksPCF8575CDWRE4
WorldwideDigiKey  Available
TI Lead Time*: 15 WeeksPCF8575CDWRG4
WorldwideDigiKey  Available
TI Lead Time*: 14 WeeksPCF8575CPW
AmericasArrow 600
Avnet 205
Rochester Electronics >1k
AsiaFarnell Asia 392
EuropeFarnell 382
WorldwideDigiKey  Available
Mouser Electronics 182
TI Lead Time*: 14 WeeksPCF8575CPWE4
WorldwideDigiKey  Available
TI Lead Time*: 14 WeeksPCF8575CPWG4
EuropeEBV Elektronik 54
WorldwideDigiKey  Available
TI Lead Time*: 14 WeeksPCF8575CPWR
AmericasArrow >1k
Rochester Electronics >1k
EuropeAvnet-SILICA >1k
WorldwideDigiKey >1k
Mouser Electronics >1k
TI Lead Time*: 14 WeeksPCF8575CPWRE4
WorldwideDigiKey  Available
TI Lead Time*: 14 WeeksPCF8575CPWRG4
WorldwideDigiKey  Available
TI Lead Time*: 17 WeeksPCF8575CRGER
AmericasRochester Electronics >1k
WorldwideDigiKey >1k
Mouser Electronics >1k
TI Lead Time*: 17 WeeksPCF8575CRGERG4
WorldwideDigiKey  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 ContentDPPM / MTBF / FIT Rate
DeviceEco Plan* Lead / Ball FinishMSL Rating / Peak ReflowDetailsDetails
PCF8575CDB RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCF8575CDBE4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCF8575CDBG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCF8575CDBQR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
PCF8575CDBQRE4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
PCF8575CDBQRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
PCF8575CDBR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCF8575CDBRE4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCF8575CDBRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCF8575CDGVR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCF8575CDGVRE4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCF8575CDGVRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCF8575CDW RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCF8575CDWE4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCF8575CDWG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCF8575CDWR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCF8575CDWRE4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCF8575CDWRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCF8575CPW RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCF8575CPWE4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCF8575CPWG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCF8575CPWR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCF8575CPWRE4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCF8575CPWRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCF8575CRGER RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
PCF8575CRGERG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView

* 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.

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