IN91531N 查看數據表（PDF） - Integral Corp.

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IN91531N

PARALLEL INPUT TONE/PULSE DIALER High-Performance Silicon-Gate CMOS

Integral Corp. 

TECHNICAL DATA

IN91531

PARALLEL INPUT TONE/PULSE DIALER

High-Performance Silicon-Gate CMOS

The IN91531 provides a 4-bit data input and a handshaking signal

to serve as microcomputer interfaces. Under microcomputer control the

IN91531 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

ORDERING INFORMATION

IN91531N

TA = -10° to 70° C

PIN ASSIGNMENT

LOGIC DIAGRAM

PIN 10 = GND

PIN 16 = VCC

1

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