M-8880-01P Clare, M-8880-01P Datasheet - Page 11
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M-8880-01P
Manufacturer Part Number
M-8880-01P
Description
IC TRANSCEIVER DTMF CMOS 20-DIP
Manufacturer
Clare
Datasheet
1.M-8880-01P.pdf
(13 pages)
Specifications of M-8880-01P
Function
DTMF Transceiver
Number Of Circuits
1
Voltage - Supply
4.75 V ~ 5.25 V
Current - Supply
10mA
Power (watts)
78.75mW
Operating Temperature
-40°C ~ 85°C
Mounting Type
Through Hole
Package / Case
*
Includes
Automatic Tone Burst Mode, Call Progress Mode
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Interface
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
M-8880-01P
Manufacturer:
TELTONE
Quantity:
20 000
40-406-00012, Rev. G
Explanation of Events
(A) Tone bursts detected, tone duration invalid, RX Data Register not updated.
(B) Tone #n detected, tone duration valid, tone decoded and latched in RX Data Register.
(C) End of tone #n detected, tone absent duration valid, RX Data Register remain latched until next valid tone.
(D) Tone #n + 1 detected, tone duration valid, tone decoded and latched in RX Data Register.
(E) Acceptable dropout of tone #n + 1, tone absent duration invalid, RX Data Register remain latched.
(F) End of tone #n + 1 detected, tone absent duration valid, RX Data Register remain latched until next valid tone.
Explanation of Symbols
V
ESt
St/GT
RX
b3
b2
IRQ/CP
t
t
t
t
t
t
T
t
REC
REC
ID
DO
DP
DA
GTA
GTP
IN
0
-RX
3
DTMF composite input signal.
Early steering output. Indicates detection of valid tone frequencies.
Steering input/guard time output. Drives external RC timing circuit.
4-bit decoded data in receive data register.
Delayed steering output. Indicates that valid frequencies have been present/absent for the
required guard time, thus constituting a valid DTMF signal.
Output enable (input). A low level shifts Q1 - Q4 to its high impedance state.
Interrupt is active indicating that new data is in the RX data register. The interrupt is cleared
after the status register is ready.
Maximum DTMF signal duration not detected as valid.
Minimum DTMF signal duration required for valid recognition.
Minimum time between valid DTMF signals.
Maximum allowable dropout during valid DTMF signal.
Time to detect the presence of valid DTMF signals.
Time to detect the absence of valid DTMF signals.
Guard time, tone present.
Guard time, tone absent.
Figure 13 Timing Diagrams
Page 11
M-8880
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