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PDF HT6220A Data sheet ( Hoja de datos )
| Número de pieza | HT6220A | |
| Descripción | (HT6220A - HT6222A) Multi-Purpose Encoders | |
| Fabricantes | Holtek Semiconductor | |
| Logotipo |  |
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HT6220A/HT6221A/HT6222A
Multi-Purpose Encoders
Features
· Operating voltage: 2.0V~3.6V
· DOUT with 38kHz carrier for IR medium
· Low standby current
· Minimum transmission word: one word
· Build-in RC (Internal RC) oscillator
· 16-bit address codes
· 8-bit data codes
· PPM code method
· Three double-active keys
· Maximum active keys
- HT6220A: 30 keys
- HT6221A: 32 keys
- HT6222A: 64 keys
· Low power and high noise immunity CMOS
technology
· HT6220A: 16-pin NSOP package
HT6221A: 20-pin SOP package
HT6222A: 24-pin SOP package
Applications
· Television , setup box and DVD player controllers
· Burglar alarm systems
· Smoke and fire alarm systems
· Garage door controllers
· Car door controllers
· Car alarm systems
· Security systems
· Other remote control systems
General Description
The devices are CMOS LSI encoders designed for use
in remote control systems. They are capable of encod-
ing 16-bit address codes and 8-bit data codes. Each ad-
dress/data input can be set to one of the two logic
states, 0 and 1.
The HT6220A/HT6221A/HT6222A contain 30keys
(K1~K16, K17~K20, K33~K34, K37~K38, K41~K42,
K45~K46, K49~K50), 32 keys (K1~K32) and 64 keys
(K1~K64), respectively. When one of the keys is trig-
gered, the programmed address/data is transmitted to-
gether with the header bits via an IR (38kHz carrier)
transmission medium.
Block Diagram
www.DataSheet4U.com
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
Rev. 1.00
1 July 27, 2009
1 page  
HT6220A/HT6221A/HT6222A
The output code carrier of the DOUT pin is shown in Timing 2.
38kH z
C a r r ie r
8 .7 7 m s
2 6 .3 m s
Timing 2. 38kHz Carrier
The transmission codes employ the PPM (Pulse Position Modulation) method to represent their two logic states by ²0²
(1.12ms) and ²1² (2.24ms) as shown in Timing 3.
"Z e ro "
0 .5 6 m s
"O n e "
3 8 k H z c a r r ie r
d a ta p e r io d ( 1 .1 2 m s )
d a ta p e r io d ( 2 .2 4 m s )
Timing 3. Logic States
3 8 k H z c a r r ie r
· Setting the address codes (A0~A15)
The algorithm rule of the address codes (A0~A15) can
be selected by mask option.
In this case, the 16-bit on-chip MASK ROM (ROM1
and ROM2) are available, and the value of ROM1 (8
bits) and ROM2 (8 bits) are decided by one MASK
LAYER. The current value of ROM1 and ROM2 are
both ²00H². The A0~A7 are set by logical OR between
the external switch S0~S7 and the ROM1. The
A8~A15 equal some bits inverted to A0~A7, the inver-
sion are decided by Logical OR between the external
switch S8~S15 and the ROM2.
For example:
The following is an illustration of these rules in selecting
the address codes (A0~A15).
A IN
C1
H T6220A
C2 C3
C4
C5
200kW ´5
S 8 S 9 S 10 S 11 S 12
www.DataSheet4U.com
1N 4148´5
S0 S1 S2 S3 S4
( S w itc h O p e n : 0 , S w itc h C lo s e : 1 )
F ill w ith z e r o a u to m a tic a lly
E x te r n a l S w itc h S 0 ~ S 7 : 1 0 0 0 0 0 0 0
S0 S1 S2 S3 S4
O n - c h ip R O M 1 , R O M 2 : 0 0 0 0 0 0 0 0
b it0 b it7
S 0~S 4 O R R O M 1
A 0~A 7: 1 0 0 0 0 0 0 0
A0 A1 A2 A3 A4 A5 A6 A7
A 8 '~ A 1 5 ':
101000
S 8 S 9 S 10 S 11 S 12
000000
b it0
00
00
b it7
S 8~S 12 O R R O M 2
10100000
A0 A1 A2 A3 A4 A5 A6 A7
A 8~A 15: 1 1 0 1 1 1 1 1
C o m p le m e n t
1 : n o n in v e r s io n
0 : in v e r s io n
Rev. 1.00
5 July 27, 2009
5 Page 
HT6222A Application Circuit
V DD
HT6220A/HT6221A/HT6222A
4 7 m F /1 6 V
1 k W In fra re d
L E D 4 .7 W
9 D7
13 8
LE D VD D
H T6222A
7
DOUT
12
VSS
200kW ´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 R 5 R 6 R 7 R 8 A IN
21 20 19 18 17 16 15 14 23 24 1 2 3 4 5 6 22
www.DataSheet4U.com
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
K 33 K 37 K 41 K 45 K 49 K 53 K 57 K 61
K 34 K 38 K 42 K 46 K 50 K 54 K 58 K 62
K 35 K 39 K 43 K 47 K 51 K 55 K 59 K 63
K 36 K 40 K 44 K 48 K 52 K 56 K 60 K 64
1N 4148´8
Note: Typical infrared diode: EL-1L2 (KODENSHI CORP.)
Rev. 1.00
11 July 27, 2009
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet HT6220A.PDF ] | |
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