Semiconductor Pinout Informations
Part Number : BF494
Function : NPN medium frequency transistors
Package : TO92, SOT54 Package
Manufactures : Philips, NXP
Image
Description
NPN medium frequency transistor in a TO-92; SOT54 plastic package.
Pinout
Features
1. Low current (max. 30 mA)
2. Low voltage (max. 20 V).
Applications
1. HF applications in radio and television receivers
2. FM tuners
3. Low noise AM mixer-oscillators
4. IF amplifiers in AM/FM receivers.
Part Number : TSA5527T
Function : 1.3 GHz universal bus-controlled TV synthesizer
Package : SO, SSOP 16 Pin Type
Manufacturers : Philips Electronics ( https://www.nxp.com/ )
Pinouts :
Description :
The device is a single-chip PLL frequency synthesizer designed for TV and VCR tuning systems. The circuit consists of a divide-by-eight prescaler with its own preamplifier, a 15-bit programmable divider, a crystal oscillator and its programmable reference divider and a phase/frequency detector combined with a charge-pump which drives the tuning amplifier and the 33 V output. Four high-current PNP band switch buffers are provided for band switching. Two PNP buffers can be switched on simultaneously. The sum of the collector currents is limited to 50 mA.
Features
1. Complete 1.3 GHz single chip system
2. Four PNP band switch buffers (40 mA)
3. 33 V output tuning voltage
4. In-lock detector
5. 5-step ADC
6. 15-bit programmable divider
7. Low power and low radiation
Block Diagram
Applications
1. TV tuners and front ends
2. VCR tuners.
Other data sheets within the file :
TSA5526, TSA5526AM, TSA5526AT, TSA5526M, TSA5526T,
TSA5527, TSA5527AM, TSA5527AT, TSA5527M
