IL91531 ETC | Alldatasheet

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Technical content

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: belms@belms.belpak.minsk.by URL: www.bms.by 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 micro computer 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 frequencies, providing high accuracy and stability
  • 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 signaling VCC 2.5 - 10k TTL - compatible 3.58MHz 0.1mk 2.2k OSCO OSCI TONE ACK DP LATCH CE GND VCC T/P M/B MODE

ORDERING INFORMATION

TA = -10° to 70° C PIN ASSIGNMENT

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: belms@belms.belpak.minsk.by URL: www.bms.by DC ELECTRICAL CHARACTERISTICS(VCC=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 IOL2 Minimum Output Sink Current, DP VCC =2.5 V, V OL = 0.4V VCC =5.0 V, V OL = 0.4V mA mA 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, V OH = 2.4 V 1.6 mA IOLACK Minimum Output Current, ACK Sink VCC = 5.0 V, V OL = 0.4 V 4.0 mA VOR Single Row Tone VCC = 2.5 V, R L = 2.2 k Ω 500 mVp-p Output Amplitude VCC = 5.5 V, R L = 2.2 k Ω 1500 VOC Single Column Tone VCC = 2.5 V, R L = 2.2 k Ω 500 mVp-p Output Amplitude VCC = 5.5 V, RL = 2.2 k Ω 1600 AC ELECTRICAL CHARACTERISTICS Parameter Symbol Condition Guaranteed Limits Min Typ Max Unit Make/break Ratio M/B = V CC 1/2 M/B M/B = GND 2/3 Make Time M/B = 1/2 33.3 ms TM M/B = 2/3 40 Break Time M/B = 1/2 66.6 ms TB M/B = 2/3 60 Inter-Digit Pause Time M/B = 1/2 791 ms TIDP M/B = 2/3 763 Predigit Pause M/B = 1/2 35 ms TPDP M/B = 2/3 21 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: belms@belms.belpak.minsk.by URL: www.bms.by