ICM7101D IC MICROSYSTEMS, ICM7101D Datasheet - Page 2

• Manufacturer Part Number: ICM7101D
• Description: Low Cost Single Chip Telephone Ic
• Manufacturer: IC MICROSYSTEMS

PIN DESCRIPTION
Rev. 2.4
Pin No
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
1
2
3
4
5
6
7
8
9
ICmic reserves the right to change the specifications without prior notice
Symbol
HS/DPB
FOPT0
AGND
OSC1
OSC2
MFL0
VDDI
GND
RGD
RXO
VDD
TXO
STB
LLC
RXI
MO
C4
C3
C2
C1
R4
R3
R2
R1
M2
M1
VL
CI
Analog Ground
Supply Voltage
Supply Input Voltage
Power for the chip is extracted from this pin
Ground
Transmit Output
Transmit output to be connected to external power transistor for the
modulation of line voltage and for shorting the line during make period of pulse
dialing.
Line Voltage
Line Loss Compensation
0V = No LLC;
AGND=Low LLC;
VDD=High LLC.
Flash Option
FOPT0=0 - 100ms
FOPT0=1 - 600ms
DTMF Level Option
MFL0=0 - Low DTMF (~ -8/-10dB for ZAC=600ohm)
MFL0=1 - High DTMF (~ -6/-8dB for ZAC=600ohm)
Hook Switch Input and Dial Pulse Output
When off-hook, this pin is pulled high by the hook switch. During pulse dialing,
this pin is pulled low during break periods.
Oscillator Input
3.58MHz ceramic resonator input.
Oscillator Output
Ring Detection Input
Input for ring frequency detection.
Melody Output
Melody pulse output for tone ringer.
Keypad Columns
Keypad column inputs.
Keypad Rows
Keypad rows. These pins are also used to determine the operating mode.
Microphone Inputs
Input for electret microphone.
Complex Impedance and AC Impedance Input
Placing resistor between CI and AGND pins adjusts the AC impedance. If
there is no such resistor the typical AC impedance is 1000 ohm.
Receive Output
These outputs drive a dynamic earpiece.
Receive Input
Input for received signal.
Side Tone Balance Input
Side tone cancellation input.
L
OW
C
OST
S
INGLE
Description
C
HIP
ICM7101D
T
ELEPHONE
IC
2