SANYO LC7461M Datasheet

Ordering number: EN2119D

CMOS LSI

LC7461M

Infrared Remote Control Transmitter IC

Functions

.

32%3 function keys

.

13-bit custom codes

.

Operating supply voltage range VDD= 1.8 to 3.6 V

.

Supply current at the standby mode IDD= 1 µA or less

.

Double-press operation keys (no priority given)

.

On-chip oscillator (ceramic resonator : connected externally)

Package Dimensions

unit : mm

3045B-MFP24

[LC7461M]

Features

.

The custom code consists of 7 bits to be fixed by the
on-chip ROM and 6 bits being pin-settable. Sixty-four
custom codes may be selected externally (no diode required).

.

Minimum number of external parts required

SANYO : MFP24

Specifications

Absolute Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit
Maximum supply voltage V
Input voltage V
Output voltage V
Output current I
Allowable power dissipation Pd max Ta % 85°C 150 mW
Operating temperature Topr –40 to +85 °C
Storage temperature Tstg –50 to +125 °C

max V

DD

IN

OUT

OUT

DD

Each input pin VSS–0.3 to VDD+0.3 V
Each output pin VSS–0.3 to VDD+0.3 V
OUT –35 mA

VSS–0.3 to +5.5 V

Allowable Operating Conditions at Ta = 25°C

Parameter Symbol Pin Name Conditions min typ max Unit

Supply voltage V
Input high-level voltage V

Input low-level voltage V
Oscillation frequency f

DD

IH

IL

OSC

V

DD

KI0toKI3,

C

to C

0

KI0toKI3,

C

to C

0

f

= 455 kHz 1.8 3.0 3.6 V

OSC

0.7 V

5

5

DD

V

SS

400 455 500 kHz

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

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

O3096HA(II)/7058YT/6036KI,TS(KOTO) No.2119-1/7

0.3V

V

DD

DD

V

V

LC7461M

Electrical Characteristics at Ta = 25°C, VDD= 3.0 V

Parameter Symbol Pin Name Conditions min typ max Unit

Operating supply
current

Quiescent supply
current

Output high-level
current

Output high-level
voltage

Output low-level
voltage

Output OFF-state
leakage current

Input high-level current I
Input low-level current I
Input floating voltage V
Input pull down

resistance

Internal Block Diagram

I

DD

I

DS

I

1 OUT VDD= 1.8 V, VOH= 1.0 V –8 mA

OH

I

2 OUT VDD= 3.0 V, VOH= 1.0 V –25 mA

OH

V

OH

V

OL

I

OFF

IH

IL

IF

R

IN

V

DD

V

DD

KO0toKO7IOH= –0.1 mA 0.3 V

OUT IOL= 0.1 mA 0.3 V

KO0toKO71µA

C0to C
C0to C

KI0toKI3 0.1 V
KI0toKI3 75 100 125 kΩ

Key ON, output: no load 1 mA

All keys OFF, OSC stop 1 µA

VIN=V

5
5

VIN=V

DD
SS

–1 µA

1µA

V

DD

Key
output
timing
signal
generator

Oscillator

Key
entry
circuit

Divider

Key data
register

Output
circuit

Decoder

Custom code
register

No.2119-2/7

LC7461M

Pin Assignment

Top view

Pin Description

Pin Name Pin No. Input/Output Internal Equivalent Circuit Pin Function
V

DD,VSS

0toKO7 13 to 20 Output Key scan timing signal output pins

K

O

8, 12 Power supply pins VSS= GND

K

0toKI3 1 to 4 Input Keys return signal entry pins

I

Input/output pins for ceramic resonator-used
oscillation

OSC1
OSC2

C

to C

0

5

OUT 7 Output

TEST 9 Input

10
11

21 to 24,

5, 6

Input/output

Input

Oscillator configuration

Input pins for custom code setting
Capable of externally setting 6 bits of 13 bits in
all that provide a custom code

Output pin for transmit LED drive

LSI test pin
Normally set to high-level or brought to open
state

No.2119-3/7