IL91531 Datasheet, PDF (1/3 Pages) List of Unclassifed Manufacturers – PARALLEL INPUT TONE/PULSE DIALER HIGH-PERFORMANCE SILICON-GATE CMOS

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
frequencies, providing high accuracy and stability
ORDERING INFORMATION
IN91531N
• Operating voltage: 2.5 to 5.5 Volts
T_A = -10° to 70° C
• 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
03
04
05
06
07
08
13
02
MODE
M/B
T/P
D0
D1
D2
D3
16
VCC
DP
ACK
TONE
OSCI
CE
LATCH
GND
OSCO
10
2.5 - 10k
09
14
15
2.2k
12
3.58MHz
11
Korzhenevskogo 12, Minsk, 220064, Republic of
Belarus
Fax: [phone],
Phone: [phone],
277 69 16
E-mail: [e-mail]
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