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PDF HT6222 Data sheet ( Hoja de datos )
| Número de pieza | HT6222 | |
| Descripción | Multi-Purpose Encoders | |
| Fabricantes | Holtek Semiconductor Inc | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de HT6222 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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HT6221/HT6222
Multi-Purpose Encoders
Features
· Operating voltage: 1.8V~3.5V
· DOUT with 38kHz carrier for IR medium
· Low standby current
· Minimum transmission word: one word
· 455kHz ceramic resonator or crystal
· 16-bit address codes
· 8-bit data codes
Applications
· Television and video cassette recorder con-
trollers
· Burglar alarm systems
· Smoke and fire alarm systems
· Garage door controllers
· PPM code method
· Three double-active keys
· Maximum active keys
- HT6221: 32 keys
- HT6222: 64 keys
· Low power and high noise immunity
CMOS technology
· Car door controllers
· Car alarm systems
· Security systems
· Other remote control systems
General Description
The HT6221/HT6222 are CMOS LSI encoders
designed for use in remote control systems. They
are capable of encoding 16-bit address codes and
8-bit data codes. Each address/data input can be
set to one of the two logic states, 0 and 1.
Block Diagram
X2 X1
The HT6221/HT6222 contain 32 keys
(K1~K32) and 64 keys (K1~K64), respectively.
When one of the keys is triggered, the pro-
grammed address/data is transmitted together
with the header bits via an IR (38kHz carrier)
transmission medium.
O s c illa to r
D iv id e r
D a ta S e le c t
& B u ffe r
DOUT
LE D
¸ 2 4 C o u n te r &
S ync.
R 1 K e y b o a rd
1 of24 D ecoder
C ir c u it
M a tr ix &
D a ta R O M
G a te & R e g is te r s
R 8 C ir c u it
B in a r y D e te c to r
C1 C8
A IN D 7
VDD VSS
1 March 2, 2000
1 page  
HT6221/HT6222
Symbol
Parameter
Test Conditions
VDD Conditions
IOL3 Output Sink Current for C1~C8
3V VO=0.3V
VIH1 Input High Voltage for R1~R8
3V
¾
VIL1 Input Low Voltage for R1~R8 3V ¾
VIH2 Input High Voltage for C1~C8
3V
¾
VIL2 Input Low Voltage for C1~C8 3V ¾
VIH3 Input High Voltage for AIN
3V ¾
VIL3 Input Low Voltage for AIN
3V ¾
RPH1 Input Pull-high Resistance for AIN 3V VIN=0V
RPL1 Input Pull-low Resistance for AIN 3V VIN=3V
RPL2 Input Pull-low Resistance for R1~R8 3V VIN=3V
RPL3 Input Pull-low Resistance for C1~C8 3V VIN=3V
fOSC System Frequency
¾
455kHz ceramic
resonator
Min. Typ. Max. Unit
10 30 ¾ mA
1.9 ¾ 3.0 V
0 ¾ 0.8 V
1.1 ¾ 3.0 V
0 ¾ 0.6 V
1.25 ¾ 3.0 V
0 ¾ 0.6 V
100 200 400 kW
70 150 250 kW
120 200 320 kW
300 500 1500 kW
¾ 455 ¾ kHz
Functional Description
Keyboard scan
The HT6221/HT6222 remain in the halt mode
during the standby state (at this time, the oscil-
lator stops, and the standby current<1mA). The
HT6221 consists of 32 active keys, and the
HT6222 has 64 active keys. The keyboard
forms of the HT6221/ HT6222 are shown below.
· The HT6221 keyboard form
C1 C2 C3 C4
C5 C6 C7 C8
R 1 K 1 K 5 K 9 K 13 K 17 K 21 K 25 K 29
R 2 K 2 K 6 K 10 K 14 K 18 K 22 K 26 K 30
R 3 K 3 K 7 K 11 K 15 K 19 K 23 K 27 K 31
R 4 K 4 K 8 K 12 K 16 K 20 K 24 K 28 K 32
· The HT6222 keyboard form
C1 C2 C3 C4 C5 C6 C7 C8
R 1 K 1 K 5 K 9 K 13 K 17 K 21 K 25 K 29
R 2 K 2 K 6 K 10 K 14 K 18 K 22 K 26 K 30
R 3 K 3 K 7 K 11 K 15 K 19 K 23 K 27 K 31
R 4 K 4 K 8 K 12 K 16 K 20 K 24 K 28 K 32
R 5 K 33 K 37 K 41 K 45 K 49 K 53 K 57 K 61
R 6 K 34 K 38 K 42 K 46 K 50 K 54 K 58 K 62
R 7 K 35 K 39 K 43 K 47 K 51 K 55 K 59 K 63
R 8 K 36 K 40 K 44 K 48 K 52 K 56 K 60 K 64
5 March 2, 2000
5 Page 
HT6221/HT6222
Application Circuits
Application circuit 1
V DD
1 .8 V ~ 3 .5 V
100pF
9
X1
330W
100pF
455kH z
LE D
c e r a m ic r e s o n a to r
8 11
X2 LE D
6
VDD
4 7 m F /1 6 V
1kW
5
DOUT
In fra re d
47W
8050
7
D7 H T6221
10
VSS
51kW ´8
C 1 C 2 C 3 C 4 C 5 C 6 C 7 C 8 R 1 R 2 R 3 R 4 A IN
19 18 17 16 15 14 13 12 1 2 3 4 20
K 1 K 5 K 9 K 13 K 17 K 21 K 25 K 29
K 2 K 6 K 10 K 14 K 18 K 22 K 26 K 30
K 3 K 7 K 11 K 15 K 19 K 23 K 27 K 31
K 4 K 8 K 12 K 16 K 20 K 24 K 28 K 32
1N 4148´8
Note: Typical infrared diode: EL-1L2 (KODENSHI CORP.)
11 March 2, 2000
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet HT6222.PDF ] | |
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