PCA9548APW Datasheet PDF – 8-Channel I2C-Bus Switch

Part Number : PCA9548APW

Function : 8-channel I2C-bus switch with reset

Package : SO, TSSOP, HVQFN 24 Pin Type

Manufacturers : NXP Semiconductors.

Pinouts :
PCA9548APW datasheet

Description :

The PCA9548A is an octal bidirectional translating switch controlled via the I2C-bus. The SCL/SDA upstream pair fans out to eight downstream pairs, or channels. Any individual SCx/SDx channel or combination of channels can be selected, determined by the contents of the programmable control register.


1. 1-of-8 bidirectional translating switches
2. I2C-bus interface logic; compatible with SMBus standards
3. Active LOW reset input
4. Three address pins allowing up to eight devices on the I2C-bus
5. Channel selection via I2C-bus, in any combination
6. Power-up with all switch channels deselected

Other data sheets within the file : PCA9548A, PCA9548ABS, PCA9548ABS, PCA9548AD

PCA9548APW Datasheet PDF Download

PCA9548APW pdf


LP2950-N Datasheet PDF – Micropower Voltage Regulator – TI

Part Number : LP2950-N

Function : Adjustable Micropower Voltage Regulator

Package : TO-92, TO-252 Type

Manufacturers : Texas Instruments

Pinouts :

LP2950-N datasheet


Description :

The LP2950-N and LP2951-N are micropower voltage regulators with very low quiescent current (75μA typ.) and very low dropout voltage (typ. 40 mV at light loads and 380 mV at 100 mA). They are ideallysuited for use in battery-powered systems. Furthermore, the quiescent current of the LP2950-N/LP2951-N increases only slightly in dropout, prolonging battery life. The LP2950-N-5.0 is available in the surface-mount PFM package, and in the popular 3-pin TO-92 package for pin-compatibility with older 5V regulators.

The 8-lead LP2951-N is available in plastic, ceramic dual-in-line, WSON, or metal can packages and offers additional system functions. One such feature is an error flag output which warns of a low output voltage, often due to falling batteries on the input. It may be used for a power-on reset. A second feature is the logic-compatible shutdown input which enables the regulator to be switched on and off.  Also, the part may be pin-strapped for a 5V, 3V, or 3.3V output (depending on the version), or programmed from 1.24V to 29V with an external pair of resistors.

Block Diagram

LP2950-N block diagram


1. 5V, 3V, and 3.3V Versions Available
2. High Accuracy Output Voltage
3. Ensured 100 mA Output Current
4. Extremely Low Quiescent Current
5. Low Dropout Voltage
6. Extremely Tight Load and Line Regulation
7. Very Low Temperature Coefficient
8. Use as Regulator or Reference
9. Needs Minimum Capacitance for Stability
10. Current and Thermal Limiting
11. Stable With Low-ESR Output Capacitors (10mΩ to 6Ω)


1. High-Efficiency Linear Regulator
2. Regulator with Undervoltage Shutdown
3. Low Dropout Battery-powered Regulator
4. Snap-ON/Snap-OFF Regulator

Other data sheets within the file : LP2950ACZ-3.0/NOPB, LP2950ACZ-3.3/NOPB, LP2951-N

LP2950-N Datasheet PDF Download

LP2950-N pdf