LC7464M Infrared Remote Control Transmitter Preliminary Over

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LC7464M Infrared Remote Control Transmitter Preliminary Over

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Ordering number:ENN *3588
LC7464M
Infrared Remote Control Transmitter
Preliminary Overview
LC7464M 64-key infrared remote control transmitter that incorporates key-scanning, oscillator timing function on-chip, resulting very external component count. LC7464M generates function codes using function keys. output data format comprises maskprogrammed custom code, parity field, mask-programmed system code, product code, function code data check code. LC7464M operates from supply available 24-pin MFPs.
Package Dimensions
unit:mm 3045B-MFP24
[LC7464M]
15.3
Features
external component count. function keys. function codes. Mask-programmable custom system codes. product codes. Output conforms Japan's Association Electric Home Appliances recommended standards infrared remote controls. On-chip input pull-down resistors. supply. 24-pin MFP.
0.35 1.27
0.67
SANYO MFP24
Assignment
TEST
LC7464M
OSC1 OSC2
(Top View)
SANYO products described contained herein have specifications that handle applications that require extremely high levels reliability, such life-support systems, aircraft's control systems, other applications whose failure reasonably expected result serious physical and/or material damage. Consult with your SANYO representative nearest before using SANYO products described contained herein such applications. SANYO assumes responsibility equipment failures that result from using products values that exceed, even momentarily, rated values (such maximum ratings, operating condition ranges,or other parameters) listed products specifications SANYO products described contained herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
71901TN (KT)/2132JN No.3588-1/7
2.5max
0.15
2.15
0.75
10.5
LC7464M
Block Diagram
Description
Number Name Equivalent circuit Description
Keyswitch scanning inputs
TEST OSC1
driver output Supply voltage Test input. TEST should tied HIGH left open normal operation Ceramic oscillator input connection
OSC2 GCL,
Ceramic oscillator output connection Ground Product code select inputs
Keyswitch scanning outputs
No.3588-2/7
LC7464M Specifications
Absolute Maximum Ratings 25°C
Parameter Supply voltage Input voltage range Output voltage range Output current Power dissipation Operating temperature range Storage temperature range Symbol Topr Tstg Ta85°C Conditions Ratings VSS- to+5.5
VSS- VDD+0.3 VSS- VDD+0.3
Unit
+125
Recommended Operating Conditions +85°C
Parameter Supply voltage KI7, high-level input voltage KI7, low-level input voltage Oscillator frequency Symbol fOSC Conditions Ratings
0.7VDD
0.3VDD
Unit
Electrical Characteristics +85°C,
Parameter Operating supply current Standby supply current high-level output current high-level output voltage low-level output voltage high-level input current low-level input current input floating voltage input pull-down resistance Symbol Conditions pressed, load pressed, oscillator stopped VDD=2V, VDD=3V, VOH=VDD- VOH=VDD-
VDD-
Ratings
0.1VDD
Unit
IOH=- 0.1mA IOL=0.1mA VI=VDD VI=VSS
No.3588-3/7
LC7464M Functional Description
Inputs eight-by-eight matrix formed with keyswitch scanning outputs keyswitch scanning inputs shown following figure. When held down, either normal abbreviated continuation code output continously, depending mask option selected. Normally, only pressed time. more than pressed, keys ignored output generated. However, when appropriate mask option selected, three extra codes generated holding down either shown table
Table Function code generation
combination Function code
Output Data Configuration 48-bit output data configuration shown following figure. Note that data sent least-significant first.
16-bit custom code
4-bit parity
4-bit system code
8-bit product code
8-bit function code
8-bit data check code
Custom code 16-bit mask-programmable custom code C15) unique code registered with Association Electric Home Appliances. Parity bits four parity bits used error detection. Their value given following equation. Pn=Cn C(n+4) C(n+8) C(n+12) where System code four-bit system code (SC0 SC3) mask-programmed into LC7464M during fabrication.
Product code eight-bit product code (GC0 GC7) consists mask-programmable bits bits that connecting each KO7. block diagram product code generator shown following figure. mask-programmable bits, shown zero.
No.3588-4/7
LC7464M
Tables show relationships between between respectively. Table product codes
Code generated
Function code eight-bit function code (FC0 FC7) determined number pressed shown following figure, Note that when appropriate mask option selected, function codes 97H, A7H, B7H, C7H, D7H, generated holding down keys
Table product codes
Code generated
Data check code eight-bit data check code (DC0 DC7) generated adding carry bits from system code product function code bits. This code used error detection. data chek code calculated using following equation. DC=SC+GC0 GC3+GC4 GC7+FC0 FC3+FC4 example, when SC=0H, GC=0B1H, FC=35H DC=0H+1H+0BH+5H+3H=14H
Data Transmission Waveforms
Abbreviated transmission mode
Abbreviated mode detail
No.3588-5/7
LC7464M
Normal transmission mode
Oscillator LC7464M contains self-biasing CMOS inverter that used oscillator when connected ceramic resonator shown following figure. reduce power, oscillator operates only when pressed.
Typical Application
No.3588-6/7
LC7464M
Specifications SANYO products described contained herein stipulate performance, characteristics, functions described products independent state, guarantees performance, characteristics, functions described products mounted customer's products equipment. verify symptoms states that cannot evaluated independent device, customer should always evaluate test devices mounted customer's products equipment. SANYO Electric Co., Ltd. strives supply high-quality high-reliability products. However, semiconductor products fail with some probability. possible that these probabilistic failures could give rise accidents events that could endanger human lives, that could give rise smoke fire, that could cause damage other property. When designing equipment, adopt safety measures that these kinds accidents events cannot occur. Such measures include limited protective circuits error prevention circuits safe design, redundant design, structural design. event that SANYO products(including technical data,services) described contained herein controlled under applicable local export control laws regulations, such products must expor without obtaining expor license from authorities concerned accordance with above law. part this publication reproduced transmitted form means, electronic mechanical, including photocopying recording, information storage retrieval system, otherwise, without prior written permission SANYO Electric Co., Ltd. information described contained herein subject change without notice product/technology improvement, etc. When designing equipment, refer "Delivery Specification" SANYO product that intend use. Information (including circuit diagrams circuit parameters) herein example only guaranteed volume production. SANYO believes information herein accurate reliable, guarantees made implied regarding infringements intellectual property rights other rights third parties.
This catalog provides information July, 2001. Specifications information herein subject change without notice.
No.3588-7/7

LC7464M Infrared Remote Control Transmitter Preliminary Over

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