No. 5561
CMOS LSI
53197HA(OT) No. 5561-1/11
Overview
The LC73701M is a DTMP/pulse output dual-system
dialer CMOS LSI for use in push-button telephones. It
provides an on-chip serial interface and operates under the
control of data sent over that serial interface. The
LC73701M can be easily controlled by the system CPU
using this dedicated interface.
Functions
Functions as a dialer that is controlled over a serial
interface.
The built-in oscillator circuit (f
OSC
= 4.19 MHz) can use
either a crystal oscillator or a ceramic resonator as its
oscillator element.
The adoption of a high-precision (0.04%) DTMF
signal frequency divider circuit allows a ceramic
resonator to be used as the oscillator element.
The buffer memory can store up to 32 digits of 5-bit
data.
Mode change and pause commands can also be stored as
data in the buffer memory.
Pauses can be inserted automatically on mode changes
(auto-pause).
A pause can be cancelled during that pause.
The mode change function supports changing from pulse
to tone (single direction).
Generates all 16 DTMF signals.
The pulse dialer output can be turned on or off
arbitrarily.
The pulse dialer output circuit can be selected to be
either an n-channel open drain or a complementary
circuit.
The pulse dialer muting function can be turned on or off
arbitrarily.
A redial function is provided.
Flash operation is supported. (Data can be received
during flash operation.)
The flash time can be switched to be either 277 or 707
ms.
The pause time can be switched to be either 2 or 4
seconds.
Hooking pause operation is supported. (1.2 s or 801 ms)
The dial pulse rate can be specified to be either 10 pps
or 20 pps.
The dial pulse make ratio can be specified to be either
33 or 39%.
Wide operating voltage range
Pulse mode: V
DD
= 1.5 to 5.5 V
DTMF mode: V
DD
= 2.0 to 5.5 V
Package Dimensions
unit: mm
3095-MFP18
SANYO: MFP18
[LC73701M]
LC73701M
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
Serial Interface Dialler
Pin Assignment
No. 5561-2/11
LC73701M
Pin Functions
Pin No.
Pin
I/O
Pin function
1
CE
I
Set high when data is valid. This signal is also used when DTMF signals are issued consecutively in DTMF mode. The last
DTMF signal is output until CE goes low.
2
CK
I
Data acquisition clock. Data is acquired on the rising edge of this signal.
3
NC
4
DATA
I
Input for the 8-bit data.
5
RES
I
Reset input. Apply a low level to this input to reset dialer operation when, for example, power is first applied.
6
BUSYOUT
O
Outputs a high level during dialer operation, including during pauses. This is a complementary output.
7
OSCI
I
Oscillator circuit connections. Connect either a crystal or ceramic 4.194304 MHz oscillator element to these pins.
8
OSCO
O
9
V
SS
Power supply
10
V
DD
11
BMR
I
Make ratio switching input. High: 33%, Low: 39%
12
NC
13
TEST
I
LSI internal test pin. This pin either must be left open or must be tied low during normal operation.
14
DTMF
O
DTMF output. This is an npn emitter-follower output.
15
MUTE2
O
DTMF mute output. This is an n-channel open-drain output.
16
MUTE
O
DP and DTMF mute output. This is an n-channel open-drain output.
17
MUTE1
O
DP mute output. This is an n-channel open-drain output.
18
DP
O
DP output. This can be either an n-channel open-drain output or a complementary output.
Unused inputs must always be tied to an appropriate logic level, i.e. either ground or V
DD
.
DTMF
V
SS
Block Diagram
No. 5561-3/11
LC73701M
RAM
5 bits
32 digits
No. 5561-4/11
LC73701M
Input Code Table
D7
D6
D5
D4
D3
D2
D1
D0
WRITE
Data interpretation and notes
TO RAM
X
0
0
0
0
0
0
0
YES
KEY D
X
0
0
0
0
0
0
1
YES
KEY 1
X
0
0
0
0
0
1
0
YES
KEY 2
X
0
0
0
0
0
1
1
YES
KEY 3
X
0
0
0
0
1
0
0
YES
KEY 4
X
0
0
0
0
1
0
1
YES
KEY 5
X
0
0
0
0
1
1
0
YES
KEY 6
X
0
0
0
0
1
1
1
YES
KEY 7
X
0
0
0
1
0
0
0
YES
KEY 8
X
0
0
0
1
0
0
1
YES
KEY 9
X
0
0
0
1
0
1
0
YES
KEY 0
X
0
0
0
1
0
1
1
YES
KEY
*
X
0
0
0
1
1
0
0
YES
KEY #
X
0
0
0
1
1
0
1
YES
KEY A
X
0
0
0
1
1
1
0
YES
KEY B
X
0
0
0
1
1
1
1
YES
KEY C
X
0
0
1
0
0
0
0
NO
Illegal value
X
0
0
1
0
0
0
1
NO
Illegal value
X
0
0
1
0
0
1
0
NO
PAUSE clear (Only valid during a pause.)
X
0
0
1
0
0
1
1
NO
FLASH (707 or 277 ms)
X
0
0
1
0
1
0
0
NO
STOP (Forced termination of a the current dialing operation.)
X
0
0
1
0
1
0
1
NO
RD (redial)
X
0
0
1
0
1
1
0
NO
MUTE ST
X
0
0
1
0
1
1
1
NO
MUTE END
X
0
0
1
1
0
0
0
NO
ON-HOOK
X
0
0
1
1
0
0
1
NO
OFF-HOOK
X
0
0
1
1
1
0
0
YES
MODE-CH (Pulse to tone single-direction change)
X
0
0
1
1
1
0
1
YES
PAUSE (Pause for either 2.0 or 4.0 seconds.)
X : Don't care
Only bits D0 to D4 are written to RAM.
Mode Settings Command Table
Flash time
Hooking pause time
707.0 ms..................800.8 ms
277.3 ms..................1.23 s
Note that a hooking pause of 804.7 ms is also inserted automatically on a DP-off operation.
D7
D6
D5
D4
D3
D2
D1
D0
X
MODE
TEST
DPSEL
PAUSE
FLASH
P/T
DPR
X
(1)
(0)
(0) N-CH OD
(0) 4.0 s
(0) 707.0 ms
(0) Tone
(0) 20 pps
X
(1)
(0)
(0) CMP
(1) 2.0 s
(1) 277.3 ms
(1) Pulse
(1) 10 pps
No. 5561-5/11
LC73701M
Mode Settings at Power On
When power is first applied, the initial settings listed in the table below are established according to the state of the BMR
pin.
BMR PIN
DPSEL
PAUSE
FLASH
P/T
DPR
H (33.3%)
(0) N-CH OD
(0) 4.0 s
(0) 707.0 ms
(1) Pulse
(1) 10 pps
L (39.2%)
(0) N-CH OD
(0) 4.0 s
(0) 707.0 ms
(0) Tone
(1) 10 pps
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
V
DD
max
0.3 to +6.5
V
Maximum input voltage
V
IN
max
0.3 to V
DD
+0.3
V
Maximum output voltage
V
OUT
max
0.3 to V
DD
+0.3
V
Allowable power dissipation
Pd max
Ta 70C
180
mW
Minimum load resistance
R
L
min
Between the DTMF and the V
SS
pins
1
k
Operating temperature
Topr
30 to +70
C
Storage temperature
Tstg
40 to +125
C
Specifications
Absolute Maximum Ratings
at Ta = 25C, f
OSC
= 4.194304 MHz
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Supply voltage
V
DDP
Pulse mode
1.5
5.5
V
V
DDT
DTMF mode
2.0
5.5
V
Input high-level voltage
V
IHS
CK and CE input pins
0.8 V
DD
V
DD
V
V
IH
Input pins other than CK and CE
0.7 V
DD
V
DD
V
Input low-level voltage
V
ILS
CK and CE input pins
V
SS
0.2 V
DD
V
V
IL
Input pins other than CK and CE
V
SS
0.3 V
DD
V
Oscillator pin rating
f
Center frequency = 4.194304 MHz
1.4
+1.4
%
R
S
100
Allowable Operating Ranges
at Ta = 25C, f
OSC
= 4.194304 MHz
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
I
DDP
In dial pulse output mode, output open
0.3
0.5
mA
V
DD
= 3.0 V : V
DD
Quiescent current drain
I
DDT
In DTMF output mode, output open,
0.5
1.0
mA
V
DD
= 3.0 V: V
DD
I
DD(ST)
Standby mode, output open
1
A
V
DD
= 1.5 to 5.5 V : V
DD
Memory retention voltage
V
DR
Between V
DD
and V
SS
: V
DD
1
V
Memory retention current
I
DR
V
DD
= 1.0 V : V
DD
0.5
A
I
IHI
V
IH
= V
DD
, V
DD
= 5.5 V : DATA, CK, CE,
1
A
BMR, RS
Input pin current
I
ILI
V
IL
= V
SS
, V
DD
= 5.5 V : DATA, CK, CE,
1
A
BMR, RS
I
IHIT
V
IH
= V
DD
, V
DD
= 5.5 V : TEST
160
330
A
I
ILIT
V
IL
= V
SS
, V
DD
= 5.5 V : TEST
1
A
Output pin leakage current
I
OFF
V
OH
= V
DD
, V
DD
= 5.5 V, when the output is
1
A
off: BUSYOUT
V
OH1
V
DD
= 1.5 V, I
OH
= 250 A : BUSYOUT
V
DD
0.5
V
V
OH2
V
DD
= 5.5 V, I
OH
= 1 mA : BUSYOUT, DP,
V
Output pin voltage
MUTE1, MUTE2, MUTE
V
DD
1
V
OL1
V
DD
= 1.5 V, I
OL
= 250 A : BUSYOUT, DP,
0.4
V
MUTE1, MUTE2, MUTE
V
OL2
V
DD
= 5.5 V, I
OL
= 1 mA : BUSYOUT, DP,
0.4
V
MUTE1, MUTE2, MUTE
Electrical Characteristics
at Ta = 25C, f
OSC
= 4.194304 MHz
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