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 16 01 2.5 - 10k VCC MODE 09 DP 03 M/B 14 04 ACK T/P TTL - compatible 15 05 TONE D0 06 2.2k D1 07 D2 12 08 OSCI D3 13 3.58MHz CE 11 02 OSCO LATCH 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 CHARACTERISTICS(V CC=3.5V,FOSC =3.579545MHz, TA = +25°C) Guaranteed Limits Symbol Parameter Test Conditions Min Max Unit VCC Operating Voltage 2.5 5.5 V VIH High-Level Input Voltage 0.8 1 VCC VIL Low-Level Input Voltage 0 0.2 VCC IOL1 Minimum Output Sink Current, DP VCC =2.5 V, VOL = 0.4V VCC =5.0 V, VOL = 0.4V ICC Maximum Supply Current (Stand-by) CE=VCC All outputs unloaded 8 µA ICCP Maximum Supply Current (Pulse) CE=GND All outputs unloaded 1 mA ICCT Maximum Supply Current (Tone) CE=GND All outputs unloaded 1 mA IOHACK Minimum Output Current, ACK Source VCC = 5.0 V, VOH = 2.4 V 1.6 mA IOLACK Minimum Output Current, ACK Sink VCC = 5.0 V, VOL = 0.4 V 4.0 mA Single Row Tone VCC = 2.5 V, RL = 2.2 kΩ 500 mVp-p Output Amplitude VCC = 5.5 V, RL = 2.2 kΩ Single Column Tone VCC = 2.5 V, RL = 2.2 kΩ Output Amplitude VCC = 5.5 V, RL = 2.2 kΩ IOL2 VOR VOC 1 mA 3 mA 1500 500 mVp-p 1600 AC ELECTRICAL CHARACTERISTICS Parameter Symbol Condition Guaranteed Limits Min Make/break Ratio M/B Make Time TM Break Time TB Inter-Digit Pause Time TIDP Predigit Pause TPDP Typ M/B = VCC 1/2 M/B = GND 2/3 M/B = 1/2 33.3 M/B = 2/3 40 M/B = 1/2 66.6 M/B = 2/3 60 M/B = 1/2 791 M/B = 2/3 763 M/B = 1/2 35 M/B = 2/3 21 Max Unit ms ms ms ms Minimum Tone Duration TMFD 70 ms Minimum Tone Inter-digit Pause TTIDP 70 ms Tone Output Pre-digit Pause TTPDP 0 ms Oscillator Set-up Time TSTART 5 ms 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 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