KK91531 Datasheet, PDF (1/8 Pages) KODENSHI KOREA CORP. – PARALLEL INPUT TONE/PULSE DIALER High-Performance Silicon-Gate CMOS

TECHNICAL DATA
PARALLEL INPUT TONE/PULSE DIALER
High-Performance Silicon-Gate CMOS
KK91531
The KK91531 provides a 4-bit data input and a handshaking signal to
serve as microcomputer interfaces. Under microcomputer control the
KK91531 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
KK91531N
T_A = -10° to 70° C
PIN ASSIGNMENT
LOGIC DIAGRAM
PIN 10 = GND
PIN 16 = V_CC
1