ml7020mb Oki Semiconductor, ml7020mb Datasheet

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ml7020mb

Manufacturer Part Number
ml7020mb
Description
1200 Bps Modem For Remote Control Systems
Manufacturer
Oki Semiconductor
Datasheet

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GENERAL DESCRIPTION
The ML7020 is a 1200 bps modem LSI developed for remote control systems. The functions incorporated are
those of a 1200 bps FSK modem conforming to ITU-T Recommendations V.23, DTMF signal generation and
detection, call progress tone (CPT) generation and detection. Each functional block can be controlled via a 4-bit
processor
FEATURES
FEDL7020-02
1 Semiconductor
ML7020
1200 bps MODEM for Remote Control Systems
Single 5 V power supply operation (V
Low power consumption: During operation: 5 mA typ.
Built-in 1200 bps modem conforming to ITU-T V.23 recommendations
Built-in DTMF signal generator with a switchable 6-dB attenuator
Built-in DTMF detector (the input can be selected from either the line or the terminal)
Built-in call progress tone generator. The output frequency can be selected from 400 Hz and 800 Hz.
Built-in call progress tone detector
Three analog input systems (switchable)
Analog output for the line is of the differential type and can drive a 600
Analog output for the terminal is of the single-ended type and can drive a 1.2 k load.
Built-in switch for selecting the 600
4-Bit processor interface
Built-in oscillator circuit for a 3.579545 MHz crystal
Package: 32-Pin plastic SSOP (SSOP32-P-430-1.00-K) (Product name: ML7020MB)
interface.
During the power down mode: 7 A typ.
DD
termination
: 4.5 to 5.5 V)
line transformer.
This version:
Previous version: Feb. 2000
Nov. 2000
1/19

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ml7020mb Summary of contents

Page 1

... Analog output for the terminal is of the single-ended type and can drive a 1.2 k load. Built-in switch for selecting the 600 4-Bit processor interface Built-in oscillator circuit for a 3.579545 MHz crystal Package: 32-Pin plastic SSOP (SSOP32-P-430-1.00-K) (Product name: ML7020MB) : 4 termination This version: Nov ...

Page 2

Semiconductor BLOCK DIAGRAM Input Amplifier 1 TI– TI+ TIO Input Amplifier 2 LI1– LI1+ LI1O Input Amplifier 3 LI2– LI2O Output Amplifier 1 TO 1.2 k Output Amplifier 2 LO– –1 1 LO+ Output Amplifier 3 SWI ...

Page 3

Semiconductor PIN CONFIGURATION (TOP VIEW TIO 2 TI– 3 TI+ 4 LI1O 5 LI1– 6 LI1+ 7 SWI 8 SGO 9 LI2O 10 LI2– LO+ 13 LO– 14 SGC 15 GND 16 32-Pin ...

Page 4

Semiconductor PIN DESCRIPTIONS Pin No. Symbol I Power supply pin. Connect power supply to this pin. DD The output pin of the input amplifier 1. See Figure 1. For the sake of noise reduction, ...

Page 5

Semiconductor Pin No. Symbol I The address input pin A1 for the processor interface The data input/output pin D0 for the processor interface The data input/output pin D1 for the ...

Page 6

Semiconductor C1 R1 Terminal C2 R3 Line Line 2 Figure 1 Input amplifier interface Output amplifier 2 Figure 2 Output amplifier 2, 3 interface example TIO R2 Input amplifier 1 TI– TI+ SGO ...

Page 7

Semiconductor ABSOLUTE MAXIMUM RATINGS Parameter Symbol Power supply voltage V Permissible power P dissipation Output short circuit current I SHT Analog input voltage V Digital input voltage V Storage temperature range T RECOMMENDED OPERATING CONDITIONS Parameter Symbol Power supply ...

Page 8

Semiconductor ELECTRICAL CHARACTERISTICS DC Characteristics Parameter Symbol I DD1 I DD2 Power supply current I DD3 I DD4 I IH Input leak current I IL High level output V OH voltage Low level output V OL voltage Input capacitance ...

Page 9

Semiconductor AC Characteristics (DTMF Section) Parameter Symbol V DTTL Transmit level V DTTH Transmit signal level V DTDF relative value Transmit signal frequency f DDT deviation Transmit signal distortion THD DT rate DTMF detection level V DETDT DTMF non-detection ...

Page 10

Semiconductor t l DTMF signal DTMF receive data Input signal persistence duration (detection) s Normal reception is made when the input signal persistence duration is equal Input signal persistence duration (non-detection) I ...

Page 11

Semiconductor AC Characteristics (Modem Section) Parameter Symbol Modem transmit level V AOM Transmit signal level V DM relative value f Transmit carrier M frequency f S Receive signal level Carrier detection level V OFF Carrier ...

Page 12

Semiconductor AC Characteristics (Call Progress Tone Section) Parameter Symbol Transmit level V CPT Transmit frequency f CPT Distortion rate THD CPT Detection level V DETCP Non-detection level V REJCP Detection frequency f DETCP Non-detection f rejCP frequency t Detection ...

Page 13

Semiconductor AC Characteristics (Processor Interface) Parameter Symbol Write signal period Write signal width Read signal width Address data setup time Address data hold time Chip select setup time Chip select hold time Data setup time Data hold time Data ...

Page 14

Semiconductor FUNCTIONAL DESCRIPTION Description of Processor Interface List of Registers Table 1 List of processor interface registers Data written into ...

Page 15

Semiconductor MODE2 to MODE0 These registers are used for setting the mode. The contents of setting are shown in Table 3. MODE2 MODE1 MODE0 Mode name Modulator Modem transmission Modem reception Tone 1 ...

Page 16

Semiconductor SW1CONT This is the switch for selecting the DTMF reception input. 0: The input amplifier 1 is connected to the DTMF reception circuit. 1: The input amplifier 2 is connected to the DTMF reception circuit. SW2CONT This is ...

Page 17

Semiconductor APPLICATION CIRCUIT EXAMPLE 500 From 30 k terminal 500 From line terminal To line TIO 2 TI– 3 TI+ 4 LI1O 5 LI1– 6 ...

Page 18

Semiconductor PACKAGE DIMENSIONS SSOP32-P-430-1.00-K Mirror finish 5 Notes for Mounting the Surface Mount Type Package The surface mount type packages are very susceptible to heat in reflow mounting and humidity absorbed in storage. Therefore, before you perform reflow mounting, ...

Page 19

Semiconductor NOTICE 1. The information contained herein can change without notice owing to product and/or technical improvements. Before using the product, please make sure that the information being referred to is up-to- date. 2. The outline of action and ...

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