ICM7101D

FEATURES Include Dialer, Speech, and Ringer Circuit in Single Chip, Replacing Two or More ICs Single Board Design Meets Multiple PTT Requirements. Operating Range From 15 to 100mA Selectable Make-Break Ratio Tone/Pulse Dialing 32 Digit Last Number Redial Ring Frequency Discrimination 2-tones Melody Generator ICM7101D is a single chip telephone CMOS integrated circuits that meets multiple PTT requirements, allowing phone manufacturers to have single board design for various countries. This reduces inventory and simplify manufacturing processes. ICM7101D integrates dialer, speech, and ringer circuits. The integration reduces component counts, hence increases product reliability. OVERVIEW TYPICAL APPLICATION CIRCUIT Rev. 2.0 ICmic reserves the right to change the specifications without prior notice 1 PACKAGE 28-Lead SOIC AGND 1 VDD 2 VDDI 3 GND 4 TXO 5 VL 6 LLC 7 FOPT0 8 MFL0 9 HS/DPB 10 OSC1 11 OSC2 12 RGD 13 MO 14 SOIC 28 STB 27 RXI 26 RXO 25 CI 24 M1 23 M2 22 R1 21 R2 20 R3 19 R4 18 C1 17 C2 16 C3 15 C4 Rev. 2.0 ICmic reserves the right to change the specifications without prior notice 2 PIN DESCRIPTION Pin No 1 2 3 4 5 Symbol AGND VDD VDDI GND TXO Description Analog Ground Supply Voltage Ground Supply Input Voltage Power for the chip is extracted from this pin Transmit Output Transmit output to be connected to external power transistor for the modulation of line voltage and for shorting the line during make period of pulse dialing. Line Volt...