HT6240 [HOLTEK]
Infrared Remote Encoder; 红外遥控编码器
| 型号： | HT6240 |
| 厂家： | 
HOLTEK SEMICONDUCTOR INC |
| 描述： | Infrared Remote Encoder |
| 文件： | 总16页 (文件大小：167K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
HT6240-002
Infrared Remote Encoder
Features
·
·
Operating voltage: 2.2V~3.6V
Few external parts
·
·
Low power consumption
20/24-pin SOP package
Applications
·
·
Television and video cassette recorder
Car door controllers
controllers
·
Security systems
·
Garage door controllers
·
Other remote control systems
General Description
HT6240-002 is designed as infrared remote encoders,
usually applied to TV systems. The 4´8 key matrix input
and the extension bit input can transmit a max. of 256 in-
structions. HT6240-002 have two different packages:
20-pin SOP and 24-pin SOP.
Block Diagram
P
R
B
8
2
K
e
y
S
c
a
n
O
O
+
+
0
7
3
´
2
´
1 0 2
O
S
C
I
O
S
C
D
r
i
v
e
r
D
u
t
y
1
/
3
D
i
v
i
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O
S
C
O
D
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c
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p
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S
T
T
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S
T
C
T
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t
a
g
e
M
O
D
E
I
I
I
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E
E
E
0
1
2
3
I
E
-
K
E
Y
C
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l
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8
-
B
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h
i
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&
D
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h
V
D
D
V
S
S
Pin Assignment
V
S
S
1
2
3
4
5
6
7
8
9
1
1
1
2
2
2
2
2
1
1
1
1
1
1
1
4
3
2
1
0
9
8
7
6
5
4
3
V
C
O
O
O
O
O
O
O
O
N
N
D
D
T
E
S
T
T
V
S
S
1
2
3
4
5
6
7
8
9
1
2
1
1
1
1
1
1
1
1
1
0
9
8
7
6
5
4
3
2
1
V
D
D
P
R
B
+
+
+
+
+
+
+
+
0
1
2
3
4
5
6
7
T
E
S
T
C
O
O
O
O
O
O
O
O
T
O
S
C
I
P
R
B
+
+
+
+
+
+
+
+
0
1
2
3
4
5
6
7
O
S
C
O
O
S
C
I
D
A
T
A
O
S
C
O
I
I
E
E
0
1
D
A
T
A
I
E
0
I
E
2
I
E
1
I
E
3
0
1
2
I
I
E
E
2
3
N
N
C
C
C
C
0
H
T
6
2
4
0
-
0
0
2
H
T
6
2
4
0
-
0
0
2
2
0
S
O
P
-
A
2
4
S
O
P
-
A
Rev. 1.30
1
November 6, 2002
HT6240-002
Pad Assignment
1
8
1
9
1
7
2
0
P
R
B
1
O
S
C
I
2
O
O
+
+
0
1
1
6
(
0
,
0
)
1
1
5
4
O
S
C
O
3
O
O
+
+
2
3
1
3
D
A
T
E
4
I
I
E
E
0
1
5
6
1
2
O
O
+
+
4
5
1
1
7
8
9
1
0
Chip size: 92 ´ 118 mil2
* The IC substrate should be connected to VDD in the PCB layout artwork.
Pad Coordinates
Unit: mil
Pad No.
X
Y
Pad No.
11
X
Y
1
2
16.11
40.12
40.12
40.12
40.12
40.12
40.12
34.47
-8.97
-15.60
-22.23
-40.88
-40.88
-40.88
-40.88
-40.88
-40.88
-13.77
-7.14
9.22
-48.32
-39.74
-24.57
-15.98
-0.81
7.78
9.48
12
3
13
-11.56
-24.78
-34.04
-41.18
-52.78
-52.78
-53.55
-53.55
4
14
5
15
6
16
7
17
53.59
53.59
53.59
52.02
8
18
9
19
10
24.40
20
Rev. 1.30
2
November 6, 2002
HT6240-002
Pad Description
Internal
Connection
Pad No.
Pad Name
I/O
Description
CMOS
1
PRB
I
Power on reset
Pull-high
2
3
OSCI
I
CMOS
CMOS
Oscillator input
Oscillator output
OSCO
O
CMOS, NMOS
Pull-high
4
DATA
I/O
I
Detect custom code and extended code
Detect input from key matrix
CMOS
5~8
IE0~IE3
Pull-high
9~16
17
OF7~OF0
CT
O
O
NMOS
CMOS
¾
Drive for key scan
Generates output transmission code
Positive power supply
18
VDD
¾
¾
19
VSS
Negative power supply
¾
TEST=Low normal mode
TEST=High test mode
20
TEST
I
CMOS
Approximate internal connection circuits
I
O
B
n
p
u
t
t
e
r
m
i
n
a
l
P
i
n
:
T
E
S
T
,
O
S
C
I
P
i
n
:
P
R
B
,
I
E
0
~
I
E
3
V
D
D
V
D
D
V
D
D
u
t
p
u
t
t
e
r
m
i
n
a
l
P
i
n
:
O
S
C
O
,
C
T
P
i
n
:
O
+
0
~
O
+
7
V
D
D
i
d
i
r
e
c
t
i
o
n
a
l
t
e
r
m
i
n
a
l
P
i
n
:
D
A
T
A
V
D
D
Rev. 1.30
3
November 6, 2002
HT6240-002
Absolute Maximum Ratings
Supply Voltage .........................................-0.3V to 5.2V
Output Voltage..............................................VSS to VDD
Operating Temperature...........................-20°C to 70°C
Input Voltage ..................................VSS-0.3 to VDD+0.3
Storage Temperature............................-40°C to 125°C
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² may
cause substantial damage to the device. Functional operation of this device at other conditions beyond those
listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil-
ity.
Recommended Operating Condition
Ta=-20°C~70°C, unless otherwise noted
Test Conditions
Conditions
Symbol
Parameter
Supply Voltage
Min.
Typ.
Max.
Unit
VDD
VDD
2.2
3.6
3V
V
¾
¾
¾
¾
High-level Input Voltage IE0~IE3, DATA 3V
3V
Low-level Input Voltage IE0~IE3, DATA 3V
2.4V
3V
VIH
V
High-level Voltage PRB
2.1V
0
3V
0
3V
1.2V
0.9V
¾
¾
¾
¾
¾
VIL
V
3V
3V
Low-level Input Voltage PRB
Clock Oscillating Frequency
0
0
fOSC
455
kHz
¾
Electric Characteristics
Ta=25°C, VDD=3V, VSS=0V, unless otherwise noted
Test Conditions
Limits
Typ.
Symbol
Parameter
Unit
VDD
Conditions
Min.
Max.
fOSC=455kHz,
VDD
Supply Voltage
2.2
3.6
V
¾
¾
Ta=-20°C~70°C
IDD
IDD
IOH
fOSC=455kHz
Supply Current (during operation)
Supply Current (while not in operation)
High-level Output Current CT
Low-level Output Current CT
Low-level Output Current DATA
Low-level Output Current OF0~OF7
Pull-up Resistance PRB
3V
3V
3V
3V
3V
3V
3V
3V
3V
0.1
¾
0.3
1
mA
mA
¾
¾
-5
0.3
1
¾
VOH=2V
mA
-10
0.8
4
¾
¾
¾
¾
¾
¾
¾
VOL=0.9V
VOL=0.9V
VOL=0.9V
IOL
mA
1
4
80
70
70
¾
¾
¾
¾
¾
¾
RI
Pull-up Resistance DATA
kW
Pull-up Resistance E0~E3
Rev. 1.30
4
November 6, 2002
HT6240-002
Functional Description
Key operation
The input pins (IE0~IE3) and the output pins
(OF0~OF7) constitute a max. of 4´8 key matrix which is
also called standard key. The extended key is formed by
input pin DATA and the scan output (OF5~OF7). The
4´8 key matrix and the extended key can transmit a
max. of 256 instruction.
D
A
T
A
O
+
0
O
+
1
O
+
2
O
+
3
O
+
4
C
0
C
1
C
2
C
3
C
4
C
5
C
6
C
7
C
u
s
t
o
m
c
o
d
e
1
1
0
0
1
0
0
0
CT maintains ²L² and no transmission code is gener-
ated when two or more keys in standard key are
pressed.
Table 1 shows the relationship between the key matrix
and the transmission code.
Fig. 1
Table 1
Transmission Code
Key Input
D1
D0
Extended bit
The extended bit is formed by input pin DATA and the
scan output (OF5~OF7). Fig. 2 shows an example of ex-
tended bit selection.
IE0
0
0
1
1
0
1
0
1
IE1
IE2
IE3
D
A
T
A
O
+
5
O
+
6
O
+
7
Transmission Code
Scan Output
D4
D3
D2
OF0
OF1
OF2
OF3
OF4
OF5
OF6
OF7
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
D
5
D
6
D
7
D
A
T
A
c
o
d
e
1
1
0
S
S
W
=
O
N
1
0
0
W
=
O
+
+
S
W
Transmission Code
DATA Input
D7
D6
D5
OF5
OF6
OF7
1
¾
¾
1
¾
1
Fig. 2
Clock oscillating circuit
¾
¾
¾
HT6240 has built-in feedback resistor and CMOS in-
verter, so a ceramic resonator can connect between the
oscillator circuit input pin (OSCI) and the output pin
(OSCO), (see Fig. 3).
Custom code
The custom code is made up of input pin DATA and scan
output OF0~OF4. It has 8 bits (C0~C7); the lower 3 bits
of the custom code (C5, C6 and C7) are fixed as ²0².
When the ceramic resonator is set to 455kHz, the carrier
can be set 38kHz.
Fig. 1 shows an example of custom code selection.
Rev. 1.30
5
November 6, 2002
HT6240-002
Transmission code
The oscillating circuit will stop when there is no key
pressed to save power dissipation.
When the resonator is 455kHz, the carrier of the trans-
mission signal is 38kHz. One pulse width is 0.53ms.
Therefore, twenty 38kHz clocks are included in the
0.53ms pulse width. (Fig.4 shows the carrier)
H
T
6
2
4
0
-
0
0
2
HT6240-002 has two different formats. When the cus-
tom code is equal to zero, CT will send the 1st format.
Otherwise, it will send the 2nd format.
O
S
C
I
O
S
C
O
If the custom code (C0~C7) is ²0000 0000² then Fig. 5
shows the formation of the transmission code. Fig. 6
shows the transmission code ²0² and ²1² and pulse
width. Fig. 7 shows the formation of the 1-word trans-
mission code. If a legal key is pressed, HT6240-002 will
send at least five words (see Fig. 8).
C
L
I
C
L
O
N
o
t
e
:
T
h
e
s
e
c
a
p
a
c
i
t
o
r
s
d
e
p
e
n
d
o
n
t
h
e
r
e
s
o
n
a
t
o
r
s
.
U
m
s
e
t
h
e
v
a
l
u
e
s
r
e
c
o
m
m
e
n
d
e
d
b
y
t
h
e
r
e
s
o
n
a
t
o
r
a
n
u
f
a
c
t
u
r
e
r
.
Fig. 3
2
6
.
4
m
s
m
8 . 8 s
0
.
5
3
m
s
Fig. 4 Carrier
0
.
5
3
m
s
D
0
D
1
D
2
D
3
D
4
D
5
D
a
t
a
c
o
d
e
B
i
t
"
0
"
Fig. 5 Formation of the transmission code
2
.
1
1
m
s
0
.
5
3
m
s
B
i
t
"
1
"
4
.
2
2
m
s
Fig. 6 Transmission code ²0² and ²1² and pulse width of
HT6240-002
D
0
D
1
D
2
D
3
D
4
D
5
1
w
o
r
d
5
0
.
6
m
s
Fig. 7 The formation of the 1-word transmission code
1
-
w
o
r
d
1
-
w
o
r
d
1
-
w
o
r
d
1
-
w
o
r
d
1
-
w
o
r
d
5
0
.
6
m
s
5
0
.
6
m
s
5
0
.
6
m
s
5
0
.
6
m
s
Fig. 8 A legal key will send at least five words
Rev. 1.30
6
November 6, 2002
HT6240-002
On table 2, the relationship between the key matrix and
the transmission code is shown when custom
code=²0000 0000². The asterisks means that
HT6240-002 can just send five words at a time even if a
legal key is pressed for a long time. The others mean
that HT6240-002 will send five or six words, even some
more words if a legal key is still pressed.
If custom code ¹ ²0000 0000² then Fig. 9 shows the for-
mation of the transmission code. The transmission code
consists of a head pulse, 8-bit custom code and 8-bit
data code. Fig. 10 shows bit ²0² and bit ²1².
The formation of a 1-word transmission code without
carrier is shown in detail in Fig.11. Output CT should
combine with the carrier when CT is high.
Table 2
CT will send at least three words if we press a legal key.
CT may send three or four words, or several words de-
pending on the length of time the legal key is pressed.
(see Fig. 12)
OF0 OF1 OF2 OF3 OF4 OF5 OF6 OF7
IE0
IE1
IE2
IE3
00
01
02
03
04
08 0C 10* 14* 18* 1C*
05 09* 0D* 11* 15* 19* 1D*
06 0A* 0E* 12* 16* 1A* 1E*
07 0B* 0F* 13* 17* 1B* 1F*
Power on reset function (PRB)
The power on reset function can be activated by con-
necting a capacitor to PRB pin while power is applied.
The time (tC) must be longer than 0.1ms when the volt-
age in PRB pin (VC) becomes higher than 0.3VDD after
the voltage in VDD pin exceeds 2.2V.
There are 64 instructions when the custom code=²0000
0000² in HT6240-002. The transmission output CT is
still ²L² and the transmission code will not be sent when
two or more keys are pressed simultaneously.
When the power on reset function is activated, the
standby state continues until an ²L² is input to IE0~IE3.
4
.
2
2
m
s
4
.
2
2
m
s
8
.
4
4
m
s
C
0
C
1
C
2
C
3
C
4
C
5
C
6
C
7
D
0
D
1
D
2
D
3
D
4
D
5
D
6
D
7
H
e
a
d
p
u
l
s
e
C
u
s
t
o
m
c
o
d
e
D
a
t
a
c
o
d
e
Fig. 9 The formation of the transmission code when custom code ¹ ²0000 0000²
0
.
5
3
m
s
B
i
t
"
0
"
1
.
0
6
m
s
0
.
5
3
m
s
B
i
t
"
1
"
2
.
1
1
m
s
Fig. 10
D
a
t
a
c
o
d
e
1
C
u
s
t
o
m
c
o
d
e
H
e
a
d
p
u
l
s
e
C
0
=
0
C
1
=
1
C
2
=
1
C
3
=
0
C
4
=
0
C
5
=
0
C
6
=
0
C
7
=
0
D
0
=
0
D
1
=
0
D
2
=
0
D
3
=
0
D
4
=
D
5
=
0
D
6
=
0
D
7
=
0
8
.
4
4
m
s
4
.
2
2
m
s
4
.
2
2
m
s
1
-
w
o
r
d
Fig. 11
Rev. 1.30
7
November 6, 2002
HT6240-002
V
o
l
t
a
g
e
1
w
o
r
d
1
w
o
r
d
V
D
D
p
i
n
V
D
D
6
7
.
5
m
s
2
.
2
V
Fig. 12
P
R
B
p
i
n
V
S
S
V
D
D
0
.
3
V
2
0
1
3
P
R
B
T
i
m
e
0
T
C
> 0 . 1 m s
H
T
6
2
4
0
-
0
0
2
Fig. 14 Relationship between the PRB pin and the
voltage
Fig. 13 Example of power-on reset function
Application Circuits
Example (1)
S
e
t
t
i
n
g
t
h
e
c
u
s
t
o
m
c
o
d
e
S
e
t
t
i
n
g
D
5
,
D
6
,
D
7
b
i
t
s
V
D
D
S
t
a
n
d
a
r
d
k
e
y
4
7
W
1
k
W
V
D
D
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
V
D
D
C
T
O
+
0
O
+
1
O
+
2
O
+
3
O
+
4
O
+
5
O
+
6
O
+
7
H
T
6
2
4
0
-
0
0
2
V
S
S
T
E
S
T
P
R
B
O
S
C
I
O
S
C
O
D
A
T
A
I
E
0
I
E
1
I
E
2
I
E
3
1
2
3
4
5
6
7
8
9
1
0
4
5
5
K
1
0
3
4
7
1
4
7
1
"
1
"
"
0
"
o
r
Rev. 1.30
8
November 6, 2002
HT6240-002
Example (2)
S
e
t
t
i
n
g
t
h
e
c
u
s
t
o
m
c
o
d
e
D
o
u
b
l
e
-
p
u
s
h
e
d
k
e
y
V
D
D
S
t
a
n
d
a
r
d
k
e
y
4
7
W
1
k
W
V
D
D
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
V
D
D
C
T
O
+
0
O
+
1
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2
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+
3
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+
4
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5
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6
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+
7
H
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S
T
P
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1
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2
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1
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4
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7
8
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1
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5
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1
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Rev. 1.30
9
November 6, 2002
HT6240-002
Example (3)
S
e
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1
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D
2
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1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
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D
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O
+
0
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1
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2
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3
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4
O
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5
O
+
6
O
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7
H
T
6
2
4
0
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V
S
S
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3
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4
5
6
7
8
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3
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1
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Rev. 1.30
10
November 6, 2002
HT6240-002
Example (4)
V
D
D
4
7
W
1
k
W
V
D
D
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
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1
V
D
D
C
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1
I
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2
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3
1
2
3
4
5
6
7
8
9
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5
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Rev. 1.30
11
November 6, 2002
HT6240-002
Package Information
20-pin SOP (300mil) outline dimensions
2
0
1
1
A
B
1
1
0
C
C
'
G
H
D
a
E
+
Dimensions in mil
Nom
Symbol
Min
394
290
14
490
92
¾
Max
419
300
20
A
B
C
C¢
D
E
F
¾
¾
¾
¾
¾
50
¾
¾
¾
¾
510
104
¾
4
¾
G
H
a
32
4
38
12
0°
10°
Rev. 1.30
12
November 6, 2002
HT6240-002
24-pin SOP (300mil) outline dimensions
2
4
1
3
A
B
1
1
2
C
C
'
G
H
D
a
E
+
Dimensions in mil
Nom.
Symbol
Min.
394
290
14
590
92
¾
Max.
419
300
20
A
B
C
C¢
D
E
F
¾
¾
¾
¾
¾
50
¾
¾
¾
¾
614
104
¾
4
¾
G
H
a
32
4
38
12
0°
10°
Rev. 1.30
13
November 6, 2002
HT6240-002
Product Tape and Reel Specifications
Reel dimensions
D
T
2
C
A
B
T
1
SOP 20W
Symbol
Description
Dimensions in mm
A
B
Reel Outer Diameter
Reel Inner Diameter
330±1.0
62±1.5
13.0+0.5
-0.2
C
D
Spindle Hole Diameter
Key Slit Width
2.0±0.5
24.8+0.3
-0.2
T1
T2
Space Between Flange
Reel Thickness
30.2±0.2
SOP 24W
Symbol
Description
Dimensions in mm
330±1.0
A
B
Reel Outer Diameter
Reel Inner Diameter
62±1.5
13.0+0.5
-0.2
C
D
Spindle Hole Diameter
Key Slit Width
2.0±0.5
24.8+0.3
-0.2
T1
T2
Space Between Flange
Reel Thickness
30.2±0.2
Rev. 1.30
14
November 6, 2002
HT6240-002
Carrier tape dimensions
P
0
P
1
t
D
E
+
W
B
0
C
D
1
P
K
0
A
0
SOP 20W
Symbol
Description
Dimensions in mm
24.0+0.3
-0.1
W
Carrier Tape Width
P
E
Cavity Pitch
12.0±0.1
1.75±0.1
11.5±0.1
1.5+0.1
1.5+0.25
4.0±0.1
2.0±0.1
10.8±0.1
13.3±0.1
3.2±0.1
0.3±0.05
21.3
Perforation Position
F
Cavity to Perforation (Width Direction)
Perforation Diameter
Cavity Hole Diameter
Perforation Pitch
D
D1
P0
P1
A0
B0
K0
t
Cavity to Perforation (Length Direction)
Cavity Length
Cavity Width
Cavity Depth
Carrier Tape Thickness
Cover Tape Width
C
SOP 24W
Symbol
Description
Carrier Tape Width
Dimensions in mm
24.0±0.3
12.0±0.1
1.75±0.1
11.5±0.1
1.55+0.1
1.5+0.25
4.0±0.1
W
P
Cavity Pitch
E
Perforation Position
Cavity to Perforation (Width Direction)
Perforation Diameter
Cavity Hole Diameter
Perforation Pitch
F
D
D1
P0
P1
A0
B0
K0
t
Cavity to Perforation (Length Direction)
Cavity Length
2.0±0.1
10.9±0.1
15.9±0.1
3.1±0.1
Cavity Width
Cavity Depth
Carrier Tape Thickness
Cover Tape Width
0.35±0.05
21.3
C
Rev. 1.30
15
November 6, 2002
HT6240-002
Holtek Semiconductor Inc. (Headquarters)
No.3, Creation Rd. II, Science Park, Hsinchu, Taiwan
Tel: 886-3-563-1999
Fax: 886-3-563-1189
http://www.holtek.com.tw
Holtek Semiconductor Inc. (Taipei Sales Office)
4F-2, No. 3-2, YuanQu St., Nankang Software Park, Taipei 115, Taiwan
Tel: 886-2-2655-7070
Fax: 886-2-2655-7373
Fax: 886-2-2655-7383 (International sales hotline)
Holtek Semiconductor Inc. (Shanghai Sales Office)
7th Floor, Building 2, No.889, Yi Shan Rd., Shanghai, China 200233
Tel: 021-6485-5560
Fax: 021-6485-0313
http://www.holtek.com.cn
Holtek Semiconductor Inc. (Shenzhen Sales Office)
5/F, Unit A, Productivity Building, Cross of Science M 3rd Road and Gaoxin M 2nd Road, Science Park, Nanshan District,
Shenzhen, China 518057
Tel: 0755-8616-9908, 8616-9308
Fax: 0755-8616-9533
Holtek Semiconductor Inc. (Beijing Sales Office)
Suite 1721, Jinyu Tower, A129 West Xuan Wu Men Street, Xicheng District, Beijing, China 100031
Tel: 010-6641-0030, 6641-7751, 6641-7752
Fax: 010-6641-0125
Holtek Semiconductor Inc. (Chengdu Sales Office)
709, Building 3, Champagne Plaza, No.97 Dongda Street, Chengdu, Sichuan, China 610016
Tel: 028-6653-6590
Fax: 028-6653-6591
Holmate Semiconductor, Inc. (North America Sales Office)
46729 Fremont Blvd., Fremont, CA 94538
Tel: 510-252-9880
Fax: 510-252-9885
http://www.holmate.com
Copyright Ó 2002 by HOLTEK SEMICONDUCTOR INC.
The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek as-
sumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used
solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable
without further modification, nor recommends the use of its products for application that may present a risk to human life
due to malfunction or otherwise. Holtek¢s products are not authorized for use as critical components in life support devices
or systems. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information,
please visit our web site at http://www.holtek.com.tw.
Rev. 1.30
16
November 6, 2002
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