LC73701M [SANYO]
SERIAL INTERFACE DIALLER; 串行接口拨号器
| 型号： | LC73701M |
| 厂家： | 
SANYO SEMICON DEVICE |
| 描述： | SERIAL INTERFACE DIALLER |
| 文件： | 总11页 (文件大小：113K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
CMOS LSI
No. 5561
LC73701M
Serial Interface Dialler
• The dial pulse make ratio can be specified to be either
33 or 39%.
• Wide operating voltage range
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.
Pulse mode: V = 1.5 to 5.5 V
DD
DTMF mode: V = 2.0 to 5.5 V
DD
Package Dimensions
unit: mm
Functions
3095-MFP18
• Functions as a dialer that is controlled over a serial
interface.
[LC73701M]
• The built-in oscillator circuit (f
= 4.19 MHz) can use
OSC
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).
SANYO: MFP18
• 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.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
53197HA(OT) No. 5561-1/11
LC73701M
Pin Assignment
DTMF
VSS
Pin Functions
Pin No.
1
Pin
I/O
I
Pin function
CE
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
3
CK
NC
I
Data acquisition clock. Data is acquired on the rising edge of this signal.
4
DATA
RES
I
I
Input for the 8-bit data.
5
Reset input. Apply a low level to this input to reset dialer operation when, for example, power is first applied.
Outputs a high level during dialer operation, including during pauses. This is a complementary output.
6
BUSYOUT
OSCI
OSCO
VSS
O
I
7
Oscillator circuit connections. Connect either a crystal or ceramic 4.194304 MHz oscillator element to these pins.
8
O
9
Power supply
10
11
12
13
14
15
16
17
18
VDD
BMR
I
Make ratio switching input. High: 33%, Low: 39%
NC
TEST
DTMF
MUTE2
MUTE
MUTE1
DP
I
LSI internal test pin. This pin either must be left open or must be tied low during normal operation.
DTMF output. This is an npn emitter-follower output.
O
O
O
O
O
DTMF mute output. This is an n-channel open-drain output.
DP and DTMF mute output. This is an n-channel open-drain output.
DP mute output. This is an n-channel open-drain output.
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 VDD
.
No. 5561-2/11
LC73701M
Block Diagram
RAM
5 bits × 32 digits
No. 5561-3/11
LC73701M
Input Code Table
WRITE
TO RAM
D7
D6
D5
D4
D3
D2
D1
D0
Data interpretation and notes
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
KEY D
KEY 1
KEY 2
KEY 3
KEY 4
KEY 5
KEY 6
KEY 7
KEY 8
KEY 9
KEY 0
KEY *
KEY #
KEY A
KEY B
KEY C
Illegal value
NO
Illegal value
NO
PAUSE clear (Only valid during a pause.)
NO
FLASH (707 or 277 ms)
NO
STOP (Forced termination of a the current dialing operation.)
NO
RD (redial)
NO
MUTE ST
NO
MUTE END
NO
ON-HOOK
NO
OFF-HOOK
YES
YES
MODE-CH (Pulse to tone single-direction change)
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
D7
X
D6
MODE
(1)
D5
D4
D3
D2
D1
D0
TEST
(0)
DPSEL
(0) N-CH OD
(0) CMP
PAUSE
(0) 4.0 s
(1) 2.0 s
FLASH
P/T
DPR
X
(0) 707.0 ms
(1) 277.3 ms
(0) Tone
(1) Pulse
(0) 20 pps
(1) 10 pps
X
(1)
(0)
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.
No. 5561-4/11
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
(0) 4.0 s
(0) 4.0 s
FLASH
P/T
DPR
H (33.3%) (0) N-CH OD
L (39.2%) (0) N-CH OD
(0) 707.0 ms
(0) 707.0 ms
(1) Pulse
(0) Tone
(1) 10 pps
(1) 10 pps
Specifications
Absolute Maximum Ratings at Ta = 25°C, f
= 4.194304 MHz
OSC
Parameter
Maximum supply voltage
Symbol
DD max
Conditions
Ratings
–0.3 to +6.5
–0.3 to VDD +0.3
–0.3 to VDD +0.3
180
Unit
V
V
Maximum input voltage
Maximum output voltage
Allowable power dissipation
Minimum load resistance
Operating temperature
Storage temperature
VIN max
V
VOUT max
V
Pd max
L min
Ta 70°C
Between the DTMF and the VSS pins
mW
k
R
1
Topr
Tstg
–30 to +70
–40 to +125
°C
°C
Allowable Operating Ranges at Ta = 25°C, f
= 4.194304 MHz
OSC
Ratings
typ
Parameter
Symbol
Conditions
Unit
min
1.5
max
5.5
VDDP
VDDT
VIHS
VIH
VILS
VIL
Pulse mode
V
V
V
V
V
V
%
Supply voltage
DTMF mode
2.0
0.8 VDD
0.7 VDD
VSS
5.5
VDD
CK and CE input pins
Input high-level voltage
Input low-level voltage
Oscillator pin rating
Input pins other than CK and CE
CK and CE input pins
VDD
0.2 VDD
0.3 VDD
+1.4
Input pins other than CK and CE
Center frequency = 4.194304 MHz
VSS
f
–1.4
RS
100
Electrical Characteristics at Ta = 25°C, f
= 4.194304 MHz
OSC
Ratings
typ
Parameter
Symbol
Conditions
Unit
min
max
0.5
In dial pulse output mode, output open
DD = 3.0 V : VDD
IDDP
IDDT
0.3
0.5
mA
mA
V
In DTMF output mode, output open,
VDD = 3.0 V: VDD
1.0
Quiescent current drain
Standby mode, output open
IDD(ST)
1
µA
V
DD = 1.5 to 5.5 V : VDD
Memory retention voltage
Memory retention current
VDR
IDR
Between VDD and VSS: VDD
VDD = 1.0 V : VDD
1
V
0.5
1
µA
VIH = VDD, VDD = 5.5 V : DATA, CK, CE,
BMR, RS
IIHI
µA
µA
VIL = VSS, VDD = 5.5 V : DATA, CK, CE,
BMR, RS
Input pin current
IILI
–1
–1
IIHIT
IILIT
VIH = VDD, VDD = 5.5 V : TEST
VIL = VSS, VDD = 5.5 V : TEST
160
330
1
µA
µA
VOH = VDD, VDD = 5.5 V, when the output is
off: BUSYOUT
Output pin leakage current
IOFF
VOH1
VOH2
µA
V
VDD = 1.5 V, IOH = –250 µA : BUSYOUT
VDD = 5.5 V, IOH = –1 mA : BUSYOUT, DP,
MUTE1, MUTE2, MUTE
VDD –0.5
V
V
V
V
DD –1
Output pin voltage
VDD = 1.5 V, IOL = 250 µA : BUSYOUT, DP,
MUTE1, MUTE2, MUTE
VOL1
0.4
0.4
VDD = 5.5 V, IOL = 1 mA : BUSYOUT, DP,
MUTE1, MUTE2, MUTE
VOL2
No. 5561-5/11
LC73701M
Dialer Input Format
The serial data is input starting with the LSB.
T1 must be at least 6.5 µs (When an external clock is supplied to OSC1.)
If an oscillator element is used, T1 depends on the oscillator startup time for that oscillator element.
*: For example, for ceramic oscillators, T1 will be about 1 ms (V = 3.0 to 5.5 V).
DD
T2 and T3 must be at least 1.0 µs.
Serial Data Sequential Input Format
Point when the DTMF output for KEY32 goes off
KEY1 to KEY31 are guaranteed by the DTMF output time.
*: Continuous input is limited to dial data. Continuous input of mode setting commands is not possible.
Mode Settings Format
Don’t care
A06518
No. 5561-6/11
LC73701M
Timing Charts
(1) Pulse mode
(2) Tone mode
DTMF output
DP output
AC Characteristics at Ta = 25°C, f
= 4.194304 MHz
OSC
Ratings
typ
Parameter
Symbol
Conditions
Unit
min
max
When the D3 mode setting code is low (0)
When the D3 mode setting code is high (1)
4.0
s
s
Pause time
TAP
2.0
DTMF output time
TMFON
100.6
114.0
109.9
707.0
277.3
800.8
1.23
200
ms
ms
ms
ms
ms
ms
s
For the first and later digits
DTMF inter-digit pause time
Flash time
TMFOFF
For the last digit
When the D2 mode setting code is low (0)
When the D2 mode setting code is high (1)
When the D2 mode setting code is low (0)
When the D2 mode setting code is high (1)
VDD = 3.5 V, RL = 10 k
TFL
Hooking pause time
THKP
Low tone amplitude
Tone output ratio
VOR
165
1
240
3
mVrms
dB
dBCR
%DIS
V
DD = 2.0 to 5.5 V, RL = 10 k
DD = 2.0 to 5.5 V, RL = 10 k
2
Tone output distortion
V
10
%
Pulse Output at Ta = 25°C, f
= 4.194304 MHz
OSC
DPR
H
BMR
Dial pulse rate
9.97 PPS
Pre-digit pause
33.3 + 10 ms
39.2 + 10 ms
16.7 + 10 ms
19.7 + 10 ms
Inter-digit pause
839.0 ms
Make ratio
33.3%
H
L
H
9.97 PPS
844.9 ms
39.2%
L
H
L
19.93 PPS
19.93 PPS
571.6 ms
33.3%
L
574.6 ms
39.2%
DTMF Output Frequencies at Ta = 25°C, f
= 4.194304 MHz
OSC
Output frequency (Hz)
Input
Deviation (%)
Rating
697
LC73701
697.2
R1
R2
R3
R4
C1
C2
C3
C4
+0.027
–0.016
–0.023
+0.029
+0.036
–0.018
–0.009
+0.018
770
769.9
852
851.8
941
941.3
1209
1336
1477
1633
1209.4
1335.8
1476.9
1633.3
No. 5561-7/11
LC73701M
Internal Pin Circuits
Pin No.
Pin
Internal circuit
1
2
CE
CK
4
5
DATA
RES
11
BMR
6
BUSYOUT
DP
18
7
8
OSCI
OSCO
15
16
17
MUTE2
MUTE
MUTE1
13
TEST
Continued on next page.
No. 5561-8/11
LC73701M
Continued from preceding page.
Pin No.
Pin
Internal circuit
14
DTMF
18
DP
Notes:
(1) The LC73701M output ports are initialized to the following states when power is first applied.
BUSYOUT and DP pins: Low
DTMF, MUTE1, MUTE, and MUTE2 pins: High-impedance
OSC0 pin: High
(2) The following methods can be used to forcibly terminate dial output.
1. STOP command input
Output ports: The DP and MUTE1 pins hold their previous states, all others are initialized.
Redialing is possible after a STOP command is input. However, this requires that a dialing operation had been
performed previously.
2. Applying a low-level pulse (of at least 1 µs) to the RES pin.
The operation is identical to that of the STOP command.
However, redialing is not possible after this hardware reset.
3. ON-HOOK command input
The DP pin goes low, thus releasing the telephone line (circuit). Redialing is possible after an ON-HOOK
command is input. However, if this dialing operation is performed, although DTMF signals will be output, since
the DP is low dial pulses will not be output. (Since the LSI performs a redial operation internally, the BUSYOUT
pin will go high and the associated muting signal will also be output.)
4. OFF-HOOK command input
A hooking pause will be inserted automatically after the OFF-HOOK command input. Redialing is possible.
5. FLASH command input
A hooking pause will be inserted automatically after the FLASH command input. Redialing is possible.
(3) The MUTE ST and MUTE END commands
These commands allows the MUTE1 pin to be controlled arbitrarily. The other muting outputs cannot be controlled
explicitly.
The figure below shows the timing.
When a MUTE ST command is input, the MUTE1 pin goes low. During this low period, inputting pulse dial data
will not cause the MUTE1 pin to return to the high level. That is, the low level is held until the next MUTE END
command is input.
No. 5561-9/11
LC73701M
(4) The ON-HOOK and OFF-HOOK commands
These commands allows the DP pin to be controlled arbitrarily. The figure below shows the timing.
A hooking pause is inserted automatically when the OFF-HOOK command is input. The DP pin goes low when an
ON-HOOK command is input. During this low period, inputting pulse dial data will not cause the DP pin to return to
the high level. (Since the LSI performs a redial operation internally, the BUSYOUT pin will go high.) That is, the
low level is held until the next OFF-HOOK command is input.
(5) The redial command
The redial operation re-outputs the dial data in the LC73701M’s internal buffer memory. This buffer memory (redial
memory) can hold up to 32 digits of dialing data. This means that if 33 or more digits of dialing data are input, earlier
data will be overwritten starting with the thirty-third digit. After the following operations, the LC73701M will
perform a redial operation if a redial command is input.
1. When a flash command is input after dialing data has been input
2. When an STOP command is input after dialing data has been input
3. When an ON-HOOK command is input after dialing data has been input
4. When an OFF-HOOK command is input after dialing data has been input
(6) Mode settings
The break/make ratio (BMR) is switched between 33% and 39% by the BMR pin. The BMR pin is initialized after
power is first applied as shown in the table below.
BMR PIN
DPSEL
PAUSE
(0) 4.0 s
(0) 4.0 s
FLASH
P/T
DPR
H (33.3%) (0) N-CH OD
L (39.2%) (0) N-CH OD
(0) 707.0 ms
(0) 707.0 ms
(1) Pulse
(0) Tone
(1) 10 pps
(1) 10 pps
Settings other than BMR (i.e. DPR, P/T, FLASH, PAUSE, and DPSEL) are switched using mode commands. The
information set by mode setting commands is stored internally by the LSI. Set the desired mode before inputting dial
data. When dial data is written to the buffer memory, the P/T register data is attached to that dial data.
(7) Output pins during dialing and the redial operation
See the table below. The terms ON and OFF in the table below refer to the on or off state of the n-channel open drain
output transistor.
DP
ON (L)
MUTE1
MUTE, MUTE2
OFF
BUSYOUT
Redial memory
Readout is illegal
Readout is illegal
Readout allowed
Readout allowed
Readout allowed
Readout allowed
Readout allowed
Power on
OFF
L
L
L
L
RES pin
ON (L)
*1 OFF
OFF
STOP command
ON-HOOK command
OFF-HOOK command
MUTE-ST command
MUTE-END command
*2 OFF (H)
*3 OFF
OFF
ON (L)
Retains the previous state
OFF
OFF (H)
Retains the previous state
OFF
*4
H
L
L
Retains the previous state
Retains the previous state
ON
OFF
OFF
OFF
Notes: *2 Turned off during dialing. However, since this command takes priority after an OFF-HOOK command is input, the on state is retained.
*1, 3: Turned off during dialing. However, since this command takes priority after a MUTE-ST command is input, the on state is retained.
*4: Since a hooking pause is inserted automatically, this output goes high during that operation.
No. 5561-10/11
LC73701M
(8) CE input format (When an oscillator element is used.)
The figure below shows the CE timing.
Although in the timing shown in the previous figure, T1 depends on the oscillator element startup time, here, this
time does not need to be provided in the T1 period as long as it can be provided by the T4 period. For example,
assume that the oscillator startup time when a ceramic oscillator is used is about 1 ms (when V = 3.0 to 5.5 V). In
DD
this case, this time must be provided by either setting T1 = 1 ms, or by setting T4 = 1 ms. However, note that T1
must be 6.5 µs or greater and T4 must be 1 µs or greater.
■ No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace
equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of
which may directly or indirectly cause injury, death or property loss.
■ Anyone purchasing any products described or contained herein for an above-mentioned use shall:
➀ Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and
distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all
damages, cost and expenses associated with such use:
➁ Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on
SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees
jointly or severally.
■ Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for
volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied
regarding its use or any infringements of intellectual property rights or other rights of third parties.
This catalog provides information as of May, 1997. Specifications and information herein are subject to change
without notice.
No. 5561-11/11
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