Sanyo LC7385M Specifications

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.

CMOS IC

DTMF Receiver

Ordering number:ENN3003B

LC7385, 7385M

SANYO Electric Co.,Ltd. Semiconductor Company

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

Overview

The LC7385, 7385M CMOS DTMF Receiver ICs inte grate
bandsplit filter and digital decoder functions for the 16

DTMF digits used in touch-tone telephone systems.

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.

Package Dimensions

unit:mm

3007B-DIP18

[LC7385]

24.0

18

1

(1.84)

2.54

unit:mm

3095-MFP18

[LC7385M]

18

10

6.4

7.62

0.25

9

(3.25)

3.85max

3.3

1.20.5

10

0.51min

SANYO : DIP18

1

12.6

0.35

51001TN (KT)/2090YT/D238TA, TS No.3003–1/8

9

1.27

5.4

0.15

1.8max

1.5

0.1

1.22

SANYO : MFP18

6.35

0.625

7.6

Block Diagram

Pin Assignment

LC7385, 7385M

Pin Functions

.oNniPemaNO/InoitpircseD
1NI
2NI
3SGO .tuptuoreifilpmatupnI
4V

5H/BI

6DPI HGIHottesnehwedomybdnatS
7

8
9V

01EOTI

111Q
212Q
313Q
414Q
51DtSO .emitdraugtessdeecxenoitarudriapenotdilavnehwHGIHseoG
61tSEO .detcetedsieriapenotdilavnehwHGIHseoG
71TG/tSO/I.emitdraugtesotdesU
81V

+
–

FER

1CSO
2CSO

SS

DD

15 14

18 17

16

12345

I.tupnignitrevni-nonreifilpmatupnI
ItupnignitrevnireifilpmatupnI

OV(tuptuoegatlovecnerefeR

I

O

Otuptuoatadetats-3

13 12 11

678

DD

HGIHnehw8-fo-2yraniB

WOLnehwlamicedaxeH

.V0yllamroN.ylppusrewoP

HGIHnehwdelbanE

.V5yllamroN.ylppusrewoP

10

9

)2/
:noitcelestamroftuptuo4Qot1Q

.2CSOdna1CSOneewtebdetcennocsilatsyrczHM545975.3.snipkcolC

:noitcelestuptuoetats-34Qot1Q

WOLnehwecnadepmi-hgiH

No.3003–2/8

LC7385, 7385M

Specifications

Absolute Maximum Ratings at Ta=25±2˚C, VSS=0V

retemaraPlobmySsnoitidnoCsgnitaRtinU

egatlovylppusmumixaMV

egatlovtupnIV

tnerructupnII

egatlovtuptuOV

noitapissidrewopelbawollAxamdP

erutarepmetgnitarepOrpoT 58+ot04–

erutarepmetegarotSgtsT 521+ot05–

Allowable Operating Conditions at Ta=–40 to +85˚C, VSS=0V

retemaraPlobmySsnoitidnoC

egatlovgnitarepOV

egatlovlevel-hgihtupnIV

egatlovlevel-woltupnIV

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 235°C max., 10s.

xam 0.7+ot3.0–V

DD

NI

NI

TUO

–40˚C≤Ta≤+85°C

nimpytxam

DD

HI

LI

01,6sniP

5niP

01,6sniP

5niP

57.452.5V

V7.0

DD

V58.0

DD

Vot3.0–

DD

Vot3.0–

DD

sgnitaR

3.0+V
01+ot01–Am

3.0+V
052:81-PIDWm
081:81-PFMWm

˚C
˚C

V
V

V3.0

V

DD

V51.0

V

DD

tinU

DC Electrical Characteristics at T a=25±2˚C, VDD=5V, VSS=0V

retemaraPlobmySsnoitidnoC

tnerrucylppusgnitarepOI

tnerrucylppusybdnatSI

tnerruclevel-hgihtuptuOI

tnerruclevel-woltuptuOI

tnerructuptuoetats-FFO

tnerruclevel-hgihtupnII

tnerruclevel-woltupnII

tnerruc)ecruos(pu-lluPI
tnerruc)knis(nwod-lluPI

egatlovdlohserhtTG/tSV

V

FER

V

FER

egatlovtuptuoV

ecnatsisertuptuoR

)po( 0.30.7Am

DD

)ts(DD

HO

LO

I

HZO

I

LZO

HI
LI

OS

IS

TST
FER
FER

V5=DP 001Aµ

V

TUO

V

TUO

V

TUO

V

TUO

V

NI

V

NI

71niP53.2V

4niP1kΩ

71nip,V6.4=0.3–2.1–Am

71nip,V4.0=2.10.3Am

V,V0=EOT

TUO

V,V0=EOT

TUO

01,2,1snip,V5= 01Aµ

6,5,2,1snip,V0=01–Aµ

01nip,V0=EOT51–5–Aµ

6,5snip,V5=H/B,DP551Aµ

4nip,daoloN4.27.2V

Input Amplifier Characteristics at Ta=25±2˚C, VDD=5V, VSS=0V

retemaraPlobmySsnoitidnoC

egatlovtesffotupnIV

tnerructesffotupnII

noitcejerylppusrewoPRRSPzHk106Bd

noitcejeredomnommoCRRMC 06Bd

niagegatlovpool-nepOA

htdiwdnaBniaGBd0f

egatlovtuptuomumixaMV

daoleviticapacelbareloTC

daolevitsiserelbareloTR

egnaredomnommoCV

OI

VSS≤VNI≤V

OI

O
T

RL≥ k001 Ω 5.4p-pV

O

L
L

MC

DD

daoloN0.3p-pV

sgnitaR

nimpytxam

61,51,41,31,21,11snip,V6.4=8.0–4.0–Am

61,51,41,31,21,11snip,V4.0=0.15.2Am

41,31,21,11snip,V5=01Aµ
41,31,21,11snip,V5=01–Aµ

sgnitaR

nimpytxam

52–52+Vm

001±An

56Bd

5.1zHM

001Fp
05kΩ

tinU

tinU

No.3003–3/8

LC7385, 7385M

AC Characteristics at Ta=25±2˚C, VDD=5V, VSS=0V, f

retemaraPlobmySsnoitidnoC

levellangistupnidilaV 9,6,5,3,2,192–1.1mBd

timiltpeccatsiwT 11,9,6,3,201±Bd

timiltpeccanoitaivedycneuqerF9,5,3,2
timiltpeccanoitaivedycneuqerF5,3,25.3±%

ecnarelotenotdrihT 01,9,5,4,3,261–Bd

ecnarelotenotlaiD 01,9,8,5,4,3,281+Bd

ecnarelotesioN 01,9,7,5,4,3,221–Bd

emitnoitcetedtneserpenoTt

emitnoitcetedtnesbaenoTt

tpeccanoitarudenoTt

tcegernoitarudenoTt

tpeccaesuaptigidretnIt
tcejeresuaptigidretnIt
tS(yalednoitagaporP → )QtQPdaoloN,V5=EOT811sµ
tS(yalednoitagaporP → )DtSt

Q(pu-tesatadtuptuO → )DtSt

yaledelbanetuptuOt

yaledelbasidtuptuOt

ycneuqerfkcolCf

daoleviticapackcolCC

PD
AD

CER

JER

DI

OD

DTSP

DTSQ

R

ETP

L

R

DTP

L

CSO

OX

2CSO 03Fp

=3.579545MHz

OSC

nimpytxam

.margaidgnimiteeS

.tnemtsujdaemitdraugeeS.elbatsujdA

daoloN,V5=EOT21sµ
daoloN,V5=EOT5.4sµ

C,k01=

Fp05=05001sn

L

C,k01=

Fp05=003sn

L

51141sm

5.00.45.8sm
04sm

04sm

9575.35975.31385.3zHM

sgnitaR

tinU

%5.1±

zH2±

02sm

02sm

Conditions

1. dBm=decibels avove or below a reference power of 1mW into a 600Ω 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

Timing Diagram

LC7385, 7385M

No.3003–5/8

Decode Table

LFHFYEKEOT

796
796
796
077
077
077
258
258
258
149
149
149
796
077
258
149

–

9021
6331
7741
9021
6331
7741
9021
6331
7741
6331
9021
7741
3361
3361
3361
3361

–

Note : Z=High impedance

DTMF Dialing Matrix

LC7385, 7385M

"L"=H/B"H"=H/B

4Q3Q2Q1Q4Q3Q2Q1Q

L

L

L

L

H

L

L

1
2
3
4
5
6
7
8
9
0
*
#
A
B
C
D
–

H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L

L

L

L

L

L

H

L

H

L

H

L

H

L

L

H

L

H

L

H

L

H

H

H

H

H

H

H

H

H

L

L

Z

Z

L

H

H

H

L

L

H

L

L

H

H

H

L

L

H

L

L

H

H

H

L

L

H

L

L

H

H

H

L

L

Z

Z

L
L
L
L

L
H
H
H
H
H
H

L

L
H
H

Z

L
L
H
H
H
L
L
L
H
H
H
L
H
L
H
Z

mWORnLOC

H

L

L

H

L

L

H

L

L

H

L

L

H

L

L

H

H

L

L

L

L

H

H

H

H

H

H

H

H

H

Z

Z

No.3003–6/8

LC7385, 7385M

Guard Time Setting Guard Time Adjustment

Component values are chosen using the following formula :

t

REC=tDP+tGTP

tID=tDA+t

(a) Basic Circuit

t

GTP

t

GTA

(b) t

GTP<tGTRA

t

GTP=R1 R2

t

GTA=R1

GTA

=RC · In [VDD/(VDD–V
=RC · In (VDD/V

TST

)

/(R1+R2) · C · In [VDD/(VDD–V

C · In (VDD/V

TST

)

TST

)]

)]

TST

(c) t

GTP>tGTA

t

GTP=R1

t

GTA=R1 R2

C · In [VDD/(VDD–V

/(R1+R2) · C · In (VDD/V

Differential Input Configuration

Example of component values

C1=C2=0.01µF
R1=R2=R5=100kΩ
R4=60kΩ, R3=37.5kΩ

TST

)]

)

TST

R4R

R4+R

5

5

R3=

Voltage gain : AV=

Input impedance=

R

5

R

1

2

2 √ R

2

1

1

+

2πf

C1

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 exported without obtaining the export 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