SC7461-103 datasheet, PDF - EEWORLD Datasheet

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SC7461-103: DescriptionIC,REMOTE-CONTROL TRANSMITTER/ENCODER,CMOS,SOP,24PIN; Categorysemiconductor Other integrated circuit (IC); File Size192KB，14 Pages; ManufacturerSilan; Websitehttp://www.silanic.com.cn/; Hangzhou Silan Microelectronics Co., Ltd. (SSE stock code: Silan Micro, 600460) is located in Hangzhou High-tech Industrial Development Zone. It is a high-tech enterprise specializing in integrated circuit chip design and semiconductor microelectronics related product production. The company's current main products are integrated circuits and semiconductor products.

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SC7461-103 Overview

IC,REMOTE-CONTROL TRANSMITTER/ENCODER,CMOS,SOP,24PIN

IC,REMOTE-控制发射机/编码器,CMOS,SOP,24PIN

SC7461-103 Parametric

Parameter Name	Attribute value
Number of terminals	24
Minimum operating temperature	-10 Cel
Maximum operating temperature	70 Cel
EU RoHS regulations	Yes
state	Contact Mf
Consumer IC Type	REMOTE CONTROL TRANSMITTER IC
jesd_30_code	R-PDSO-G24
Packaging Materials	PLASTIC/EPOXY
ckage_code	SOP
ckage_equivalence_code	SOP24,.4
packaging shape	RECTANGULAR
Package Size	SMALL OUTLINE
wer_supplies__v_	3
qualification_status	COMMERCIAL
sub_category	Remote Control ICs
surface mount	YES
Craftsmanship	CMOS
Temperature level	Commercial
Terminal form	GULL WING
Terminal spacing	1.27 mm
Terminal location	DUAL

SC7461-103 Preview

Silan

Semiconductors

INFRARED REMOTE CONTROL

TRANSMITTER

DESCRIPTION

The SC7461 is a remote control transmitter utilizing CMOS

Technology specially designed for infrared applications. It is

capable of controlling 32 function keys and 3 double keys. SC7461 is

housed in 24 pins, SO Package and provides 13 bits Custom Code.

SC7461

FEATURES

* CMOS Technology

* Low Power Consumption

* 32+3 Function Keys

* Least External Components

* Wide range of operating voltage: V

=2.0~5.5V

* Double key operation(No order of priority given)

* On-Chip Oscillator can be constructed using an externally

connected ceramic resonator

* Up to 64 Custom Codes may be selected externally for SC7461

SOP-24

ORDERING INFORMATION

Part No.

SC7461

Package

SOP-24-375-1.27

APPLICATIONS

* TV and VCR

* Audio Equipment

* Audio Cassette Deck

* Air Conditioner

* Multi-Media DVD Player

ORDERING INFORMATION

Valid Part Number

SC7461-100

SC7461-101

SC7461-103

SC7461-104

Package

SOP-24

Custom Code in Mask ROM

C6~C12=1000000

C6~C12=0000000

C6~C12=0010000

C6~C12=1010000

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.2

2002-02-28.

Silan

Semiconductors

PIN CONFIGURATION

SC7461

KI0

KI1

KI2

KI3

OUT

TEST

OSCI

KO0

KO1

KO2

KO3

KO4

KO5

KO6

KO7

SC7461

OSCO

BLOCK DIAGRAM

OSCI

OSCO

KI0

KI1

KI2

KI3

Output Circuit

OUT

OSC Circuit

Key

Input

Scan

Circuit

Timing

Generation

&Control Circuit

Custom

Code

Code Generation Circuit

Key Output Timing Signal Generator

KO7

TEST

KO0

KO1

KO2

KO3

KO4

KO5

KO6

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.2

2002-02-28.

Silan

Semiconductors

ABSOLUTE MAXIMUM RATING

(Tamb=25

°C,

unless otherwise specified)

Characteristic

Maximum Supply Voltage

Input Voltage

Output Voltage

Output Current

Allowable Power Dissipation

Storage Temperature

Operating Temperature

SC7461

Description

Each Input pin

OUT

Ta<=85°C

Symbol

DD(max)

OUT

(max)

stg

opr

Value

Vss-0.3~10

Vss-0.3~V

+0.3

Vss-0.3~V

+0.3

-35

150

-40~+125

-10~+70

Unit

°C

ELECTRICAL CHARACTERISTICS

(Tamb=25

°C

, V

=3.0V,unless otherwise specified)

Parameter

Operating Supply Current

Quiescent Supply Current

High Level Output Current

High Level Output Voltage

Low Level Output Voltage

Output OFF-State Leakage Current

Custom Code High Level Input Current

Custom Code Low Level Input Current

Input Floating Voltage

Input Pull-Down Resistance

Symbol

OH1

OH2

OFF

Test conditions

Key ON, Output: no load

All keys OFF, OSC stops

=1.8V, V

=1.0V

=3.0V, V

=2.0V

=1mA

= V

Min

Typ

Max

Unit

µA

-8

-25

2.4

0.2

-1

0.1V

100

125

µA

kΩ

RECOMMENDED OPERATING CONDITIONS

(Tamb=25°C, fosc=455kHz,unless otherwise specified)

Characteristic

Supply Voltage

High Level Input Voltage

Low Level Input Voltage

Oscillation Frequency

Symbol

fosc

Min.

2.0

0.7V

Vss

400

Typ.

3.0

Max.

3.3

0.3V

Unit

KHz

455

500

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.2

2002-02-28.

Silan

Semiconductors

PIN DESCRIPTION

Pin No.

1~4

13~20

21~24

5,6

SC7461

I/O

Key Input Pins

Output Pins For Transit LED Drive

Power Supply

LSI Test Pin. This pin is normally set to High State or Floating.

Oscillator Input Pin

Oscillator Output Pin

Power Supply Vss=GND

Key Scan Timing Signal Output Pins

Custom Code Input Pins. Capable of externally setting 6 out of

13 bits for custom coding.

Symbol

KI0~KI3

OUT

TEST

OSCI

OSCO

KO7~KO0

C0~C3

C4~C5

Description

FUNCTIONAL DESCRIPTION

1.OSCILLATION CIRCUIT

A self-biased type amplifier is housed by a CMOS Inverter Method. Thus, an oscillation circuit can be

constructed by connecting a ceramic resonator. Please refer to Figure 4 for the oscillation circuit diagram.

100pF

455KHz

100pF

SC7461

FIGURE 1. OSCILLATION CIRCUIT DIAGRAM

Unless the keys are being operated, the oscillation is normally stopped. Thus, power consumption is considerably

reduced.

2.KEY INPUT

A total of 32 keys can be connected by Key Inputs--KI0~KI3 and Timing Signals--KO0~KO7. Double Key

Operation is possible for only Key No.20 in combination with the other keys connected to the KO5 line, namely: Key

No.21, 22 or 23. Thus, only the following key combinations may be used for the double key operation:

1).Key Nos.20 and 21

2).Key Nos.20 and 22

3).Key Nos.20 and 23

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.2

2002-02-28.

Silan

Semiconductors

SC7461

There is no order of priority given in key input. This means that keys designated for the double keying operation

may be pressed in any sequence. When two keys (designated for the double key operation) are pressed

simultaneously, a series of pulse is outputted according to each key input. Pressing other keys that are NOT

intended for the double key operation do NOT generate any output.

The Key Matrix is given in the following diagram.

KO0 KO1 KO2 KO3 KO4 KO5 KO6 KO7

KI0

KI1

KI2

KI3

FIGURE 2. KEY MATRIX

3.DOUBLE KEY OPERATION

Double Key Operation is useful for tape deck recording operation. The following table shows the Key Data

corresponding to the double keys pressed. Also refer to the Key Input Section.

Key

K20+K21

K20+K22

K20+K23

NOTE: Key Data--D6 and D7 may be preset to "0", "1" by mask option.

Key 20

(H=Key-ON)

Key 21

Key 22

Key 20&21

Key 21

Key 22

Key 20&22

Key 20

Transmission

Transmission Transmission

Transmission Transmission Transmission

Stops

Data

FIGURE 3. TRANSMISSION DATA DIAGRAM

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.2

2002-02-28.

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