IL91531 Datasheet – Parallel Input Tone / Pulse Dialer
Parallel Input Tone / Pulse Dialer ( HIGH-PERFORMANCE SILICON-GATE CMOS )
Package DIP 16 Pin Type
IL91531 overview
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.
Datasheet
il91531-datasheet.pdf
IL91531 features
- 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
IL91531 pinout
IL91531 applications
- LED Lighting Drivers
- DC/DC Converters
- Power Management
- Industrial Applications
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