| Customization: | Available |
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| Conductive Type: | Bipolar Integrated Circuit |
| Integration: | MSI |
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PCAL6416AHF,128 : I/O Expander 16 I²C, SMBus 400 kHz 24-HWQFN (4x4)
Mfr. Part#: PCAL6416AHF,128
Datasheet: 
(e-mail or chat us for PDF file)
ROHS Status:
Quality: 100% Original
Warranty: ONE YEAR
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Product Status
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Active
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Number of I/O
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16
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Interface
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I²C, SMBus
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Interrupt Output
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Yes
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Features
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POR
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Output Type
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Open Drain, Push-Pull
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Current - Output Source/Sink
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10mA, 25mA
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Clock Frequency
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400 kHz
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Voltage - Supply
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1.65V ~ 5.5V
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Operating Temperature
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-40°C ~ 85°C
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Mounting Type
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Surface Mount
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Package / Case
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24-WFQFN Exposed Pad
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Supplier Device Package
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24-HWQFN (4x4)
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Base Product Number
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PCAL6416
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The PCAL6416A is a 16-bit general-purpose I/O expander that provides remote I/O expansion for most microcontroller families via the I2C-bus interface. NXP I/O expanders provide a simple solution when additional I/Os are needed while keeping interconnections to a minimum, for example, in battery-powered mobile applications for interfacing to sensors, push buttons, keypad, etc. In addition to providing a flexible set of GPIOs, it simplifies interconnection of a processor running at one voltage level to I/O devices operating at a different (usually higher) voltage level. The PCAL6416A has built-in level shifting feature that makes these devices extremely flexible in mixed signal environments where communication between incompatible I/O voltages is required. Its wide VDD range of 1.65 V to 5.5 V on the dual power rail allows seamless communications with next-generation low voltage microprocessors and microcontrollers on the interface side (SDA/SCL) and peripherals at a higher voltage on the port side. There are two supply voltages for PCAL6416A: VDD(I2C-bus) and VDD(P). VDD(I2Cbus) provides the supply voltage for the interface at the master side (for example, a microcontroller) and the VDD(P) provides the supply for core circuits and Port P. The bidirectional voltage level translation in the PCAL6416A is provided through VDD(I2C-bus). VDD(I2C-bus) should be connected to the VDD of the external SCL/SDA lines. This indicates the VDD level of the I2C-bus to the PCAL6416A, while the voltage level on Port P of the PCAL6416A is determined by the VDD(P). The PCAL6416A contains the PCA6416A register set of four pairs of 8-bit Configuration, Input, Output, and Polarity Inversion registers and additionally, the PCAL6416A has Agile I/O, which are additional features specifically designed to enhance the I/ O. These additional features are: programmable output drive strength, latchable inputs, programmable pull-up/pull-down resistors, maskable interrupt, interrupt status register, programmable open-drain or push-pull outputs. The PCAL6416A is a pinto-pin replacement to the PCA6416A, however, the PCAL6416A powers up with all I/ O interrupts masked. This mask default allows for a board bring-up free of spurious interrupts at power-up. 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 or output register. The polarity of the Input Port register can be inverted with the Polarity Inversion register, saving external logic gates. Programmable pull-up and pull-down resistors eliminate the need for discrete components.
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