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| Ordering number:ENN3003B CMOS IC LC7385, 7385M DTMF Receiver Overview The LC7385, 7385M CMOS DTMF Receiver ICs integrate bandsplit filter and digital decoder functions for the 16 DTMF digits used in touch-tone telephone systems. Package Dimensions unit:mm 3007B-DIP18 [LC7385] 24.0 18 10 Features * Single +5V power supply. * Decodes all 16 DTMF digits. * Built-in differential input amplifier. * On-chip filters, including * Dial tone filter. * High-group filter. * Low-group filter. * User-selectable acquisition and release times. * Pin-selectable 4-bit hexadecimal or binary-coded 2-of-8 output. * 3-state data outputs facilitate microcontroller or other peripheral interfaces. * Standby mode. * Low-power double-poly CMOS process. * LC7385 : 18-pin DIP package. LC7385M : 18-pin MFP package. 7.62 6.4 1 9 (1.84) 2.54 0.5 1.2 0.51min SANYO : DIP18 unit:mm 3095-MFP18 [LC7385M] 18 10 12.6 0.35 1.27 1.22 0.1 1.5 SANYO : MFP18 Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft's control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications. SANYO assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges,or other parameters) listed in products specifications of any and all SANYO products described or contained herein. SANYO Electric Co.,Ltd. Semiconductor Company TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN 51001TN (KT)/2090YT/D238TA, TS No.3003-1/8 0.625 1 9 1.8max 0.15 6.35 7.6 5.4 3.3 3.85max (3.25) 0.25 LC7385, 7385M Block Diagram Pin Assignment 18 17 16 15 14 13 12 11 10 1 2 3 4 5 6 7 8 9 Pin Functions Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Name IN+ IN- GS VREF B/H PD OSC1 OSC2 VSS TOE Q1 Q2 Q3 Q4 StD ESt St/GT VDD O O I/O Goes HIGH when valid tone pair duration exceeds set guard time. Goes HIGH when valid tone paire is detected. Used to set guard time. Power supply. Normally 5V. O 3-state data output I I/O I I O O I I I O Input amplifier non-inverting input. Input amplifier inverting input Input amplifier output. Reference voltage output (VDD/2) Q1 to Q4 output format selection : Binary 2-of-8 when HIGH Hexadecimal when LOW Standby mode when set to HIGH Clock pins. 3.579545MHz crystal is connected between OSC1 and OSC2. Power supply. Normally 0V. Q1 to Q4 3-state output selection : Enabled when HIGH High-impedance when LOW Description No.3003-2/8 LC7385, 7385M Specifications Absolute Maximum Ratings at Ta=252C, VSS=0V Parameter Maximum supply voltage Input voltage Input current Output voltage Allowable power dissipation Operating temperature Storage temperature Symbol VDD max VIN IIN VOUT Pd max Topr Tstg -40CTa+85C Conditions Ratings -0.3 to +7.0 -0.3 to VDD+0.3 -10 to +10 -0.3 to VDD+0.3 DIP-18 : 250 MFP-18 : 180 -40 to +85 -50 to +125 Unit V V mA V mW mW C C Allowable Operating Conditions at Ta=-40 to +85C, VSS=0V Parameter Operating voltage Input high-level voltage Input low-level voltage Symbol VDD VIH VIL Pins 6, 10 Pin 5 Pins 6, 10 Pin 5 Conditions Ratings min 4.75 0.7VDD 0.85VDD typ max 5.25 Unit V V V 0.3VDD 0.15VDD V V Note : When soldering the 18-pin MFP package, solder it manually or use the infrared reflow method. Do not use the dip-soldering method. The conditions for the infrared reflow method are 235C max., 10s. DC Electrical Characteristics at Ta=252C, VDD=5V, VSS=0V Parameter Operating supply current Standby supply current Output high-level current Output low-level current OFF-state output current Input high-level current Input low-level current Pull-up (source) current Pull-down (sink) current St/GT threshold voltage VREF output voltage VREF output resistance Symbol IDD(op) IDD(st) IOH IOL IOZH IOZL IIH IIL ISO ISI VTST VREF RREF PD=5V VOUT=4.6V, pins 11, 12, 13, 14, 15, 16 VOUT=4.6V, pin 17 VOUT=0.4V, pins 11, 12, 13, 14, 15, 16 VOUT=0.4V, pin 17 TOE=0V, VOUT=5V, pins 11, 12, 13, 14 TOE=0V, VOUT=5V, pins 11, 12, 13, 14 VIN=5V, pins 1, 2, 10 VIN=0V, pins 1, 2, 5, 6 TOE=0V, pin 10 PD, B/H=5V, pins 5, 6 Pin 17 No load, pin 4 Pin 4 2.4 1 -10 -15 -5 5 2.35 2.7 15 -10 10 1.0 1.2 -0.8 -3.0 2.5 3.0 10 Conditions Ratings min typ 3.0 max 7.0 100 -0.4 -1.2 Unit mA A mA mA mA mA A A A A A A V V k Input Amplifier Characteristics at Ta=252C, VDD=5V, VSS=0V Parameter Input offset voltage Input offset current Power supply rejection Common mode rejection Open-loop voltage gain 0dB Gain Bandwidth Maximum output voltage Tolerable capacitive load Tolerable resistive load Common mode range Symbol VIO IIO PSRR CMRR AO fT VO CL RL VCM No load RL100k Conditions Ratings min -25 VSSVINVDD 1kHz 100 60 60 65 1.5 4.5 100 50 3.0 typ max +25 Unit mV nA dB dB dB MHz Vp-p pF k Vp-p No.3003-3/8 LC7385, 7385M AC Characteristics at Ta=252C, VDD=5V, VSS=0V, fOSC=3.579545MHz Parameter Valid input signal level Twist accept limit Frequency deviation accept limit Frequency deviation accept limit Third tone tolerance Dial tone tolerance Noise tolerance Tone present detection time Tone absent detection time Tone duration accept Tone duration regect Interdigit pause accept Interdigit pause reject Propagation delay (St Q) Propagation delay (St StD) Output data set-up (Q StD) Output enable delay Output disable delay Clock frequency Clock capacitive load tDP tDA tREC tREJ tID tDO tPQ tPSTD tQSTD tPTE tPTD fOSC CXO OSC2 TOE=5V, No load TOE=5V, No load TOE=5V, No load RL=10k, CL=50pF RL=10k, CL=50pF 8 12 4.5 50 300 3.5759 3.5795 3.5831 30 100 Adjustable. See guard time adjustment. Symbol 1, 2, 3, 5, 6, 9 2, 3, 6, 9, 11 2, 3, 5, 9 2, 3, 5 2, 3, 4, 5, 9, 10 2, 3, 4, 5, 8, 9, 10 2, 3, 4, 5, 7, 9, 10 See timing diagram. 5 0.5 40 20 40 20 11 3.5 -16 +18 -12 11 4.0 14 8.5 Conditions Ratings min -29 10 1.5% 2Hz % dB dB dB ms ms ms ms ms ms s s s ns ns MHz pF typ max 1.1 Unit dBm dB Conditions 1. dBm=decibels avove or below a reference power of 1mW into a 600 load. 2. All 16 DTMF tones. 3. 40ms DTMF tone duration and 40ms pause duration. 4. Nominal DTMF frequencies. 5. Both tones in composite signal have an equal amplitude. 6. Tone pair deviated by 1.5% 2Hz. 7. Bandwidth limited (0 to 3kHz) Gaussian noise. 8. 350Hz and 440Hz +2% dial tone frequencies. 9. Error rate better than 1 in 10,000. 10. Referenced to lowest level frequency component in DTMF signal. 11. Twist=ratio of high-frequency tone level to low-frequency tone level. Single-Ended Input Configuration No.3003-4/8 LC7385, 7385M Timing Diagram No.3003-5/8 LC7385, 7385M Decode Table B/H="L" FL 697 697 697 770 770 770 852 852 852 941 941 941 697 770 852 941 - FH 1209 1336 1477 1209 1336 1477 1209 1336 1477 1336 1209 1477 1633 1633 1633 1633 - KEY 1 2 3 4 5 6 7 8 9 0 * # A B C D - TOE Q4 H H H H H H H H H H H H H H H H L L L L L L L L H H H H H H H H L Z Q3 L L L H H H H L L L L H H H H L Z Q2 L H H L L H H L L H H L L H H L Z Q1 H L H L H L H L H L H L H L H L Z Q4 L L L L L L H H H H H H L L H H Z Q3 L L L H H H L L L H H H L H L H Z Q2 L L H L L H L L H L L H H H H H Z COL n Q1 L H L L H L L H L H L L H H H H Z B/H="H" ROW m Note : Z=High impedance DTMF Dialing Matrix No.3003-6/8 LC7385, 7385M Guard Time Setting Component values are chosen using the following formula : tREC=tDP+tGTP tID=tDA+tGTA (a) Basic Circuit tGTP=RC * In [VDD/(VDD-VTST)] tGTA=RC * In (VDD/VTST) Guard Time Adjustment (b) tGTP Differential Input Configuration Example of component values C1=C2=0.01F R1=R2=R5=100k R4=60k, R3=37.5k R3= R4 R5 R4+R5 R5 R1 Voltage gain : AV= Input impedance= 2 R1 + 2 1 2fC1 2 No.3003-7/8 LC7385, 7385M Specifications of any and all SANYO products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's products or equipment. SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO products(including technical data,services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be expor ted without obtaining the expor t license from the authorities concerned in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of SANYO Electric Co., Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the SANYO product that you intend to use. 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, 2001. Specifications and information herein are subject to change without notice. PS No.3003-8/8 |
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