DESCRIPTION
The SMA540B is a NPN Transistor integrating a current mirror as biasing. In this way the IC (collector current) can be controlled setting the current at Bias pin according to IC = 10 * IBIAS. The IBIAS current is easy adjustable using an external resistor. SMA540B is housed in ultra miniature SOT323-4L package(LEAD FREE), the relative dimensions are 1.15mmx1.8mm with 0.8mm thickness.

• HIGH GAIN LOW NOISE AMPLIFIERS Gms = 19 dB at 1.8 GHz
• CURRENT EASY ADJUSTABLE BY AN EXTERNAL RESISTOR
• OPEN COLLECTOR OUTPUT
• TYPICAL SUPPLY VOLTAGE: 1.4-3.3 V
• TRANSITION FREQUENCY 42 GHz
• ULTRA MINIATURE SOT323-4L PACKAGE (LEAD FREE)

APPLICATIONS
• WIDEBAND APPLICATIONS
• CELLULAR AND CORDLESS TELEPHONES
• HIGH FREQUENCY OSCILLATORS