(Hong Kong)
Product Summary
The XC74WL125ASR is a dual tone multiple frequency receiver. The XC74WL125ASR is a silicon gate CMOS LSI device containing the filter and decoder for detection of a pair of tones confirming to the DTMF standard with outputs in hexadecimal. The XC74WL125ASR provides excellent power line noise and dial tone rejection and is suitable for applications in central office equipment, PABX, and keyphone systems, remote control equipment and consumer telephony product.
Parametrics
XC74WL125ASR absolute maximum ratings: (1) DC supply voltage VDD: -0.5 to 6V; (2) Input voltage, any pin except Ain: -0.5 to VDD +0.5V; (3) Input voltage, Ain: VDD -10 to VDD +0.5V; (4) DC current drain per pin I: ±10mA; (5) power disspation PD: 30mW; (6) Operating temperature range TA: -40 to +85°C; (7) storage temperature range: -65 to +150°C.
Features
XC74WL125ASR features: (1) single +5V power supply; (2) detects all 16 standard digits; (3) uses inexpensive 3.58MHz crystal; (4) provides guard time controls to improve speech immunity; (5) output in 4-bit hexadeciamal code; (6) built-in 60Hz and dial tone rejection.
Diagrams
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