msm7715 Oki Semiconductor, msm7715 Datasheet
msm7715
Related parts for msm7715
msm7715 Summary of contents
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... MSM7715 Multi-Function Telecommunication LSI GENERAL DESCRIPTION The MSM7715 is a signal transmitting and receiving LSI device for applications such as telemeters. The MSM7715 uses a no-ringing communication mode. Built-in functions includes a 300 bps full-duplex modem complying with ITU-T V.21, a DTMF signal (PB signal) generator and receiver, and a call progress tone (CPT) detector. The answer tone (1650 Hz) generation can be accomplished with the built-in modem ...
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Pre- 2765 Hz + AIN – LPF BEF 4 dB Smooth AOUT – + GAT2 – GAT1 + MOD Voltage VR1 Ref. VR2 SGO SG SGC DTMF DTO Generator PON * Power GND 0 V ...
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... Semiconductor PIN CONFIGURATION (TOP VIEW) DTG4 1 TEN CPW 5 ICTA 6 ICTB 7 DTTIM 8 MODE1 9 MODE2 10 MODE3 connect pin 44-Pin Plastic QFP MSM7715 SGO 31 AIN AOUT PON 23 SP 3/21 ...
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... Input for controlling power-on. When “1” is input, all lines of this device enter the PON 24 I* power down state, and then the operation of each funciton stops and the receiver timer is reset. AOUT 27 O Analog signal output. The DTMF signal or modem sending signal is output. MSM7715 Description . DD 4/21 ...
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... Input for external adjustment of the modem’s carrier detection level. GND 41 — Ground. DTG1 42 Inputs for specifying the DTMF code to be sent. DTG2 43 I* Data is latched at the falling edge of TEN. DTG3 44 Note: Digital inputs that are pulled up internally by a high resistance. MSM7715 Description . DD 5/21 ...
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... DTMF mode PON = "1" Power-down –100 100 CLK I = –100 mA OH £ 100 MSM7715 Rating Unit –0 –0 0 –65 to +150 °C Min. Typ. Max. Unit 2.5 3.0 3.6 V –40 — +85 °C 0.8 V — ...
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... DTTIM = "0" DTTIM = "1" DTTIM = "0" DTTIM = "1" DTTIM = "0" t > DTTIM = "1" > DTTIM = "0" S MSM7715 = 2 3 –40°C to +85°C) Min. Typ. Max. Unit –16.5 –14.5 –12.5 dBm *1 –15.5 –13.5 – ...
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... V /V receive modem signal NRTS NRTS : 2765 Hz ±30 Hz AIN Æ Condition 400 Hz 400 Hz See Fig. 3. See Fig. 3. — — MSM7715 = 2 3 –40°C to +85°C) Min. Typ. Max. Unit –11 –9 –7 dBm –1.5 0 1.5 dB 976 ...
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... GAT1, AIN SGO AOUT Potential difference between VR1 and SGO 4 kHz to 8 kHz Measured at AOUT 8 kHz to 12 kHz R1 every 4 kHz C4 = 680 pF bandwidth of 12 kHz or more MSM7715 = 2 3 –40°C to +85°C) Min. Typ. Max. Unit — — 1.1 Vp-p 20 — — ...
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... Against the stop of the input signal, DT1 to DT4 and SP stop outputting after a delay Figure 1 DTMF Receive Timing or more, receiving is normally done less, this input signal is ignored and DT1 more, DT1 to DT4 and SP are reset. P MSM7715 less B is applicable while B . Therefore, latch DT1 SP or more. C 10/21 ...
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... When the DTMF tone is sent TEN t SDT DTG1 DTG2 DTG3 DTG4 DTO When the call progress tone (CPT) is detected AIN CP CPW = "1" CP CPW = "0" Figure 3 Call Progress Tone Detect Timing t HDT 941 Hz + 1447 Hz Figure 2 DTMF Transmit Timing 400 Hz t DELCP MSM7715 t HOLCP 11/21 ...
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... V input pin. 3.579545 MHz Figure 5 Connection of the External Clock SGC – SG voltage + generating circuit + To the internal – circuit + – SGO Figure 6 Signal Ground voltage (GND) to this pin. IL voltage remains connected to the digital IL MSM7715 X1 X2 voltage ( this IH DD 12/21 ...
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... REC. MODEM * * must be more than 2.5 V after this wait time. DD becomes more than 2 V, set PON="0". DD must be more than 2.5 V after this wait time. DD MSM7715 Functional Block CPT DET. FSK CPW = "1" CPW = "0" ...
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... AOUT Figure 7 Signal Flow in Normal Operation The MSM7715 uses the analog loopback test (ALB) mode and remote digital loopback test (RDLB) mode as the modem testing functions. In these test modes, the signal flow shown in Figure 8 is used. O (originate)/A (answer) in the test mode is the expression based on the modulator side ...
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... Table 2 DTMF Signal Codes High-group signal (Hz) 941 1209 1336 1477 1633 * * * * * * * * * * * * * * * * MSM7715 DT4 DT3 DT2 DT1 DTG4 DTG3 DTG2 DTG1 ...
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... DTG1 to DTG4. In power-down mode (PON = "1"), DT1 to DT4 enter a high-impedance state. Since the pull-up resistors in DTG1 to DTG4 also enter a high-impedance state, potential of this 4-bit bus line becomes unstable from the MSM7715. Microcontroller Figure 9 Microcontroller Interface Example DT1 ...
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... component in the first order LPF for suppressing the out-of-band output noise. Select a value C4 in such a way that cutoff frequency F 8 kHz (2p ¥ R1 ¥ 4dB AOUT RC-LPF GAT2 GAT1 DTO DTMF Generator MOD Modulator R1, R2, R3 ≥ 20 kW, R1 £ R2, R1 £ R3 AOM AODT determined by R1 and C4 will be approximately C MSM7715 + – 17/21 ...
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... SG 6 Figure 11 External Adjustment of the Carrier Detection Level The carrier detection level is determined by the resistance ratio between the MSM7715's internal resistors r1 and r2, unless external resistors R4 and R5 are connected. By connecting external resistors R4 and R5, the detection level can be adjusted. However, the width of hysteresis cannot be changed. ...
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... The peripheral circuits should be designed so that the circuit-return level, including variations of the line impedance, of the transmit signal to the AIN pin is –9 dBm or less – AMP1 R14 R10 R13 C9 – + R15 R15≥60 kW MSM7715 – + AOUT – + AIN SGO SG 19/21 ...
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... Semiconductor APPLICATION CIRCUIT C3 SGC GAT1 R1 GAT2 C4 R2 MOD R3 DTO VR1 VR2 GND DTG1 DTG2 DTG3 Line DT4 DT3 DT2 DT1 CLK Microcontroller MSM7715 20/21 ...
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... Therefore, before you perform reflow mounting, contact Oki’s responsible sales person for the product name, package name, pin number, package code and desired mounting conditions (reflow method, temperature and times). MSM7715 (Unit : mm) Package material Epoxy resin ...