IN91531N

IL91531 PARALLEL INPUT TONE/PULSE DIALER HIGH-PERFORMANCE SILICON-GATE CMOS The IN91531N provides a 4-bit data input and a handshaking signal to serve as microcomputer interfaces. Under microcomputer control the IN91531N generates both a DTMF signal and a pulse output for telephone dialing. All necessary dual-tone frequencies and dial pulse outputs are derived from the widely used TV crystal standard, providing high accuracy and stability. The required sinusoidal waveform for individual tones is digitally synthesized on the chip, resulting in a waveform with very low total harmonic distortion. 4-bit parallel data input from microcomputer TTL compatible inputs and outputs Uses TV crystal standard (3.58 MHz) to derive all ORDERING INFORMATION frequencies, providing high accuracy and stability IN91531N TA = -10° to 70° C Operating voltage: 2.5 to 5.5 Volts Selectable M/B ratio 10 PPS dial rate DTMF signaling of digits 0 9, *, #, A, B, C, and D Pulse signaling of 0 ∼ 9, *, #, and A High group tone pre-emphasis: 2 dB Low total harmonic distortion in DTMF PIN ASSIGNMENT signaling VCC 0.1mk 01 MODE 03 M/B 04 T/P 05 06 D1 07 D2 08 D3 13 CE 02 LATCH 16 VCC DP 14 ACK 15 TONE 09 2.5 - 10k TTL - compatible D0 2.2k 12 OSCI 3.58MHz 11 OSCO GND 10 Korzhenevskogo 12, Minsk, 220064, Republic of Belarus Fax: +375 (17) 278 28 22, Phone: +375 (17) 278 07 11, 277 24 70, 277 24 61, 277 69 16 E-mail: [email protected] URL: www.bms.by IL91531 DC ELECTRICAL CHARA...