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PDF LC72701M Data sheet ( Hoja de datos )
| Número de pieza | LC72701M | |
| Descripción | Serial Interface Dialler | |
| Fabricantes | Sanyo Semicon Device | |
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No. 5561
CMOS LSI
LC73701M
Serial Interface Dialler
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 (fOSC = 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: VDD = 1.5 to 5.5 V
DTMF mode: VDD = 2.0 to 5.5 V
Package Dimensions
unit: mm
3095-MFP18
[LC73701M]
SANYO: MFP18
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
1 page  
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
H (33.3%)
L (39.2%)
DPSEL
(0) N-CH OD
(0) N-CH OD
PAUSE
(0) 4.0 s
(0) 4.0 s
FLASH
(0) 707.0 ms
(0) 707.0 ms
P/T
(1) Pulse
(0) Tone
DPR
(1) 10 pps
(1) 10 pps
Specifications
Absolute Maximum Ratings at Ta = 25°C, fOSC = 4.194304 MHz
Parameter
Maximum supply voltage
Maximum input voltage
Maximum output voltage
Allowable power dissipation
Minimum load resistance
Operating temperature
Storage temperature
Symbol
VDD max
VIN max
VOUT max
Pd max
RL min
Topr
Tstg
Conditions
Ta ≤ 70°C
Between the DTMF and the VSS pins
Ratings
–0.3 to +6.5
–0.3 to VDD +0.3
–0.3 to VDD +0.3
180
1
–30 to +70
–40 to +125
Unit
V
V
V
mW
kΩ
°C
°C
Allowable Operating Ranges at Ta = 25°C, fOSC = 4.194304 MHz
Parameter
Symbol
Conditions
Supply voltage
Input high-level voltage
Input low-level voltage
Oscillator pin rating
VDDP
VDDT
VIHS
VIH
VILS
VIL
f
RS
Pulse mode
DTMF mode
CK and CE input pins
Input pins other than CK and CE
CK and CE input pins
Input pins other than CK and CE
Center frequency = 4.194304 MHz
Electrical Characteristics at Ta = 25°C, fOSC = 4.194304 MHz
min
1.5
2.0
0.8 VDD
0.7 VDD
VSS
VSS
–1.4
Parameter
Quiescent current drain
Memory retention voltage
Memory retention current
Input pin current
Output pin leakage current
Output pin voltage
Symbol
Conditions
IDDP
IDDT
IDD(ST)
VDR
IDR
IIHI
IILI
IIHIT
IILIT
IOFF
VOH1
VOH2
VOL1
VOL2
In dial pulse output mode, output open
VDD = 3.0 V : VDD
In DTMF output mode, output open,
VDD = 3.0 V: VDD
Standby mode, output open
VDD = 1.5 to 5.5 V : VDD
Between VDD and VSS: VDD
VDD = 1.0 V : VDD
VIH = VDD, VDD = 5.5 V : DATA, CK, CE,
BMR, RS
VIL = VSS, VDD = 5.5 V : DATA, CK, CE,
BMR, RS
VIH = VDD, VDD = 5.5 V : TEST
VIL = VSS, VDD = 5.5 V : TEST
VOH = VDD, VDD = 5.5 V, when the output is
off: BUSYOUT
VDD = 1.5 V, IOH = –250 µA : BUSYOUT
VDD = 5.5 V, IOH = –1 mA : BUSYOUT, DP,
MUTE1, MUTE2, MUTE
VDD = 1.5 V, IOL = 250 µA : BUSYOUT, DP,
MUTE1, MUTE2, MUTE
VDD = 5.5 V, IOL = 1 mA : BUSYOUT, DP,
MUTE1, MUTE2, MUTE
min
1
–1
–1
VDD –0.5
VDD –1
Ratings
typ
max
5.5
5.5
VDD
VDD
0.2 VDD
0.3 VDD
+1.4
100
Ratings
typ
0.3
0.5
max
0.5
1.0
1
0.5
1
160 330
1
0.4
0.4
Unit
V
V
V
V
V
V
%
Ω
Unit
mA
mA
µA
V
µA
µA
µA
µA
µA
µA
V
V
V
V
No. 5561-5/11
5 Page 
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 VDD = 3.0 to 5.5 V). In
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.
s 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.
s Anyone purchasing any products described or contained herein for an above-mentioned use shall:
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:
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.
s 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
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet LC72701M.PDF ] | |
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