Sanyo LC7465M 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

Infrared Remote Control Transmitter IC

Ordering number:ENN *3590

LC7465M

SANYO Electric Co.,Ltd. Semiconductor Company

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

Preliminary
Overview

The LC7465M is a 64-key infrared remote controller trans­mitter IC that incorporates key-scanning, oscillator and tim­ing circuits on-chip, resulting in a very low external com­ponent count.
The LC7465M generates 256 function codes using the 64
function keys. The output data format comprises the mask­programmed custom code, the parity field, the mask-pro­grammed system code, the product code, the function code
and the data check code.
The LC7465M operates from a 2.0 to 3.6 V supply and is
available in 30-pin MFPs.

Features

• Low external component count.

• 64 function keys.

• 256 function codes.

• Mask-programmable custom and system codes.

• 64 product codes.

• Output conforms to Japan’s Association for Electric Home
Appliances recommended standards for infrared remote
controls.

• On-chip input pull-down resistors.

• 2.0 to 3.6 V supply.

• 30-pin MFP.

Package Dimensions

unit:mm

3073B-MFP30SD

[LC7465M]

15.2

30

1

0.4

Pin Assignment

16

15

(2.25)

0.1

(0.6)

1.0

SANYO : MFP30SD

7.9

0.25

2.45max

9.2

0.65

10.5

Top view

71901TN (KT)/2123JN No.3590–1/8

Block Diagram

LC7465M

OSC1
OSC2

Pin Description

rebmuNemaNtiucrictnelaviuqEnoitpircseD

KI0
KI1
KI2
KI3
KI4
KI5
KI6
KI7

OSC

KEY

INPUT

BUFFER

KEY DIGIT
TIMING GENERATOR

KO0

KO1

KO2

KO3

DIVIDER

KEY

DATA

REGISTER

KO4

KO5

KO6

KO7

SEL

FCS1

FCS2

FCS3

TIMING
GENERATOR

OUTPUT

CONTROL

GC CODE
REGISTER

GCL

GCH

V

DD

V

SS

TEST
NC

NC

REM

8ot17IKot0IK stupnigninnacshctiwsyeK

9MERtuptuorevirdDEL

01V
11TSET noitarepolamronrofnepotfelroHGIHdeitebdluohsTSET.tupnitseT

211CSO noitcennoctupnirotallicsocimareC

312CSO noitcennoctuptuorotallicsocimareC

41V

61,51CN nepotfelebdluohS.noitcennocoN

71LES stupnitcelesedomedocnoitcnuF

02ot813SCFot1SCF stupnitcelesedocnoitcnuF
12HCG
22LCG

03ot327OKot0OK stuptuogninnacshctiwsyeK

DD

SS

egatlovylppuS

dnuorG

stupnitcelesedoctcudorP

No.3590–2/8

LC7465M

Specifications

Absolute Maximum Ratings at Ta = 25˚C

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egatlovtupnIV

egatlovtuptuOV

tnerructuptuOI

noitapissidrewopelbawollAxamdP 051Wm

erutarepmetgnitarepOrpoT –58+ot04

erutarepmetegarotSgtsT –521+ot05

Recommended Operating Conditions at Ta = –40 to +85˚C

retemaraPlobmySsnoitidnoC

egnaregatlovylppuSV

LESdna3SCFot1SCF,HCG,LCG,7IKot0IK

egatlovlevel-hgihtupni

LESdna3SCFot1SCF,HCG,LCG,7IKot0IK

egatlovlevel-woltupni

ycneuqerfrotallicsOf

xamDD

I

O

O

Ta≤85˚C

DD

V

HI

V

LI

CSO

VSS–5.5+ot3.0V

VSS–Vot3.0
VSS–Vot3.0

sgnitaR

nimpytxam

0.20.36.3V

V7.0

DD

V

SS

334554

3.0+

DD

3.0+

DD

–53Am

V

DD

V3.0

DD

774

˚C
˚C

V
V

tinU

V

V

zHk

Electrical Characteristics at Ta = –40 to +85˚C, V

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tnerrucylppusgnitarepOI

tnerrucylppusybdnatSI

tnerruclevel-hgihtuptuoMERI

egatlovlevel-hgihtuptuo7OKot0OKV

egatlovlevel-woltuptuoMERdna7OKot0OKV

level-hgihtupni3SCFot1SCFdnaHCG,LCG

tnerruc

level-woltupni3SCFot1SCFdnaHCG,LCG

tnerruc

egatlovgnitaolftupni7IKot0IKV

ecnatsisernwod-lluptupni7IKot0IKR

DD
SD

V

HO

HO
LO

I

HI

I

LI

FI
NI

DD

V

DD

IHO=– Am1.0
I

LO

VIV=

VIV=

= 2.0 to 3.6 V

DD

sgnitaR

nimpytxam

daolon,desserpyeK 1Am

deppotsrotallicso,desserpyekoN 1Aµ
V,V2=
V,V3=

Am1.0= 3.0V

DD

SS

–V1–5.2

HOV=DD

–V1–11

HOV=DD

VDD–3.0

1Aµ

–1 Aµ

V1.0

DD

57001

521

tinU

Am

V

V

kΩ

No.3590–3/8

LC7465M

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16

17
18
19
20
21
22
23
24

25
26
27
28
29
30
31
32

33
34
35
36
37
38
39
40

41
42
43
44
45
46
47
48

49
50
51
52
53
54
55
56

57
58
59
60
61
62
63
64

KI0 KI1 KI2 KI3 KI4 KI5 KI6 KI7

KO0
KO1
KO2
KO3
KO4
KO5
KO6
KO7

Functional Description

Key Inputs

An eight-by-eight matrix is formed with the keyswitch
scanning outputs KO0 to KO7 and the keyswitch scan­ning inputs KI0 to KI7 as shown in the following figure.
When a key is held down, either the normal or abbrevi­ated continuation code is output continously, depending
on the mask option selected.
Normally, only one key can be pressed at a time. If more
than one key is pressed, all keys are ignored and no
output is generated. However, when the appropriate mask
option is selected, seven function codes can be generated
by holding down key 8 and one of keys 16, 24, 32, 40,
48, 56 and 64 as shown in table 1.

Output Data Configuration

The 48-bit output data configuration is shown in the
following figure. Note that the data is sent least-signifi­cant bit first.

Table 1. Function code generation

noitanibmocyeK

0CF1CF2CF3CF4CF5CF6CF7CF
61,8 11101001
42,8 11100101
23,8 11101101
04,8 11100011
84,8 11101011
65,8 11100111
46,8 11101111

edocnoitcnuF

C0 to C15

16-bit custom code 4-bit parity 4-bit system code 8-bit product code 8-bit function code 8-bit data check code

P0 to P3 SC0 to SC3 GC0 to GC7 FC0 to FC7 DC0 to DC7

Custom code

The 16-bit mask-programmable custom code (C0 to C15)
is a unique code registered with the Association for
Electric Home Appliances.

Parity bits

The four parity bits (P0 to P3) are used for error detec­tion. Their value is given by the following equation.
Pn=Cn ⊕ C(n+4) ⊕ C(n+8) ⊕ (n+12)
where n=0 to 3.

System code

The four-bit system code (SC0 to SC3) is mask-pro­grammed into the LC7465M during fabrication.

Product code

The eight-bit product code (GC0 to GC7) consists of two
mask-programmable bits and six bits that are set by
connecting each of GCL and GCH to one of KO0 to
KO7. The block diagram of the product code generator is
shown in the following figure. GC1 and GC3 are the
mask-programmable bits, shown set to zero.

No.3590–4/8

LC7465M

Tables 2 and 3 show the relationships between GCL and
L0 to L2, and between GCH and H0 to H2, respectively.
Table 2. GCL product codes

niP

0OK 000
1OK 100
2OK 010
3OK 110
4OK 001
5OK 101
6OK 011
7OK 111

0L1L2L

detarenegedoC

Table 3. GCH product codes

niP

0OK 000
1OK 100
2OK 010
3OK 110
4OK 001
5OK 101
6OK 011
7OK 111

0H1H2H

detarenegedoC

Function code

The eight-bit function code (FC0 to FC7) is determined
by the number of the key pressed and the SEL and FCS1
to FCS3 inputs.
When SEL is LOW, bits FC3 and FC7 of the function
codes for the 64 keys are determined by FCS1 and FCS3,
respectively, as shown in tabel 4 and the following figure.

Table 4. Function code generation when SEL is LOW

1SCF2SCF3SCF

WOL

HGIH

WOL

HGIH

×
×
×
×

WOL –––0–––0
WOL –––1–––0

HGIH –––0–––1
HGIH –––1–––1

0CF1CF2CF3CF4CF5CF6CF7CF

Note

× = don’t care

− = key press code

The function codes when SEL is LOW, FCS1 is HIGH
and FCS3 is LOW are shown in the following figure. For
example, when key 23 is pressed, the generated function
code is 2EH.

edocnoitcnuF

When SEL is HIGH, the function codes for keys 1 to 32
are fixed, and bits FC3, FC6 and FC7 of the function
codes for keys 33 to 64 are determined by FCS1 to FCS3
as shown in table 5 and the following figure.

No.3590–5/8

LC7465M

Table 5. Function code generation when SEL is HIGH

1SCF2SCF3SCF

WOLWOLWOL –––0––10

HGIHWOLWOL –––1––00

WOLHGIHWOL –––0––10

HGIHHGIHWOL –––1––10

WOLWOLHGIH –––0––01

HGIHWOLHGIH –––1––01

WOLHGIHHGIH –––0––11

HGIHHGIHHGIH –––1––11

0CF1CF2CF3CF4CF5CF6CF7CF

Note

− = key press code

The function codes when SEL is HIGH, FCS1 is HIGH, FCS2 is LOW and FCS3 is HIGH are shown in the following
figure. For example, when key 45 is pressed, the generated function code is 9CH.

edocnoitcnuF

Note that when the appropriate mask option is selected, function codes 97H, A7H, B7H, C7H, D7H, E7H and F7H can
also be generated by holding down key 8 and one of keys 16, 24, 32, 40, 48, 56 and 64.

Data check code

The eight-bit data check code (DC0 to DC7) is generated by adding the carry bits from the system code to the product
and function code bits. This code is used for error detection. The data check code is calculated using the following
equation.
DC=SC+GC0 to GC3+GC4 to GC7+FC0 to
FC3+FC4 to FC7
For example, when
SC=0H, GC=0B1H, FC=35H
DC=0H+1H+0BH+5H+3H=14H

No.3590–6/8

Data Transmission Waveforms

Abbreviated transmission mode

Abbreviated mode detail

Normal transmission mode

LC7465M

Oscillator

The LC7465M contains a self-biased CMOS inverter that is used as an oscillator when connected to a ceramic resona­tor as shown in the following figure. To reduce power cunsumption, the oscillator operates only when a key is pressed.

No.3590–7/8

T ypical Application

LC7465M

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 July, 2001. Specifications and information herein are subject to
change without notice.

No.3590–8/8