8
Specifications
Input signal
Levels
LED’s
BEEPER(LP25B)
Logic “1”
TTL: > 2.3 V ± 0.2 VDC
HI (Red) ON
Fixed Tone
CMOS: >70 % Vcc ± 10%
HI (Red) ON
Logic “0”
TTL: < 0.8 V ± 0.2 VDC
LO (Green) ON
Fixed Tone
CMOS: <30 % Vcc ± 10%
LO (Green) ON
Bad Logic Level or Open circuit
none
No Tone
