PCA9901DP: One wire single LED driver
The PCA9901 is a 20 mA current source for a single LED that allows stand-alone blinking of a predefined pattern to off-load the microcontroller and save battery power.
Programming of the device is done through a training sequence: the host controller sends the LED lighting sequence and the PCA9901 memorizes it. Once the sequence has been memorized, the PCA9901 can be programmed to send it once or in a loop until the host controller requests the sequence to be stopped.
Commands and blinking sequence are sent through a uni-directional one-wire interface. Commands include: Training Start, Training End, Execute Sequence (once or in loop until a Stop Command is requested) and Reset. A blinking sequence includes up to 3 different blinking patterns, each defined by its ON and OFF timings.
A bypass mode allows the training sequence to be ignored and the LED output to follow the one-wire interface Logic state to directly control the LED from the microcontroller.
An external resistor sets the maximum current that flows in the LED, which can be set between 1 mA and 20 mA.
The PCA9901 operates from a 2.7 V to 5.5 V power supply.
Outline 3d SOT505-1
Data Sheets (1)
Users Guides (3)
Brochures (1)
Selector Guides (1)
Package Information (1)
Packing (1)
Supporting Information (1)
Ordering Information
| Product | Status | Package version | Application | Enable | Operating Temperature (Cel) | PWMs | I2C-bus interface | Reset input pin | I2C-bus (kHz) | Operating voltage (VDC) | Max Sink Current per bit (mA) | No of Addresses | Max Sink Current, per package (mA) | Number of bits |
|---|
| PCA9901DP | End of Life | SOT505-1 | | | | | | | | | | | | |
Package Information
| Product ID | Package Description | Outline Version | Reflow/Wave Soldering | Packing | Product Status | Part NumberOrdering code(12NC) | Marking | Chemical Content | RoHS / Pb Free / RHF | LeadFree Conversion Date | MSL | MSL LF |
|---|
| PCA9901DP | | SOT505-1 | Reflow_Soldering_Profile | Reel 13" Q1/T1 | Discontinued | PCA9901DP,118
(9352 866 73118) | 9901 | PCA9901DP |    | Always Pb-free | 1 | 1 |
