User's Manual

VOLTAGE CHART SST-442
26
REF PIN TX RX SB DESCRIPTION
Q 204 1 0.2 0.0 0.0 TX RF driver amplifier
2 GND GND GND
3 7.0 0.0 0.0
Q 205 1 GND GND GND TX RF Final amplifier
2 0.0 0.0 0.0
3 7.5 7.5 7.5
Q 301 1 5.0 0.0 0.0 PTT detection
2 GND GND GND
3 0.0 5.0 5.0
Q 302 1 4.3 5.0 5.0 PTT detection
2 5.0 5.0 5.0
3 5.0 0.0 0.0
Q 303 1 5.0 5.0 5.0 Battery +V switching
2 4.3 4.3 4.3
3 6.8 6.8 6.8
Q 304 1 6.8 6.8 6.8 Battery +V switching
2 7.5 7.5 7.5
3 7.5 7.5 7.5
Q 306 1 4.3 4.3 5.0 +5V switching
2 5.0 5.0 5.0
35.05.0*
Q 307 1 0.0 5.0 0.0 Audio amplifier enable
2 0.0 4.3 0.0
3 7.5 6.8 7.5
Q 308 1 7.5 6.8 7.5 Audio amplifier +V
2 7.5 7.5 7.5 switching
3 0.0 7.5 0.0
Q 401 1 0.7 0.7 * VCO buffer amplifier
2 GND GND GND
32.92.9*
Q 402 1 0.7 0.7 * VCO buffer amplifier
2 GND GND GND
32.82.8*
Q 403 1 2.3 2.3 * VCO oscillator
21.61.6*
34.34.3*
Q 404 1 4.7 4.7 * VCO voltage
2 4.3 4.3 * de-coupling
35.05.0*
Q 405 1 0.0 4.3 * TX/RX VCO switching
24.34.3*
34.20.0*
Q 406 1 0.0 4.3 * TX/RX VCO switching
2 GND GND GND
34.30.0*