Multi-Purpose Encoders. HT6221B Datasheet

HT6221B Encoders. Datasheet pdf. Equivalent

HT6221B Datasheet
Recommendation HT6221B Datasheet
Part HT6221B
Description Multi-Purpose Encoders
Feature HT6221B; HT6220A/HT6221A/HT6221B/HT6222A Multi-Purpose Encoders Features · Operating voltage: 2.0V~3.6V · DO.
Manufacture Holtek Semiconductor
Datasheet
Download HT6221B Datasheet




Holtek Semiconductor HT6221B
HT6220A/HT6221A/HT6221B/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: 6 keys (8SOP) or 30 keys (16NSOP)
- HT6221A: 32 keys
- HT6221B: 48 keys
- HT6222A: 64 keys
· Low power and high noise immunity CMOS
technology
· HT6220A: selection of 16-pin NSOP or 8-pin SOP
package
HT6221A/HT6221B: 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/HT6221B/HT6222A contain
6keys (K21~K23, K25~K27) or 30keys (K1~K20,
K33~K34, K37~K38, K41~K42, K45~K46, K49~K50),
32 keys (K1~K32), 48 keys (K1~K32, K33~K34,
K37~K38, K41~K42, K45~K46, K49~K50, K53~K54,
K57~K58, K61~K62) and 64 keys (K1~K64), respec-
tively. 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 me-
dium.
Block Diagram
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. 1.20
1 October 12, 2010



Holtek Semiconductor HT6221B
HT6220A/HT6221A/HT6221B/HT6222A
Pin Assignment
R3
DOUT
VDD
VSS
1
2
3
4
8 R2
7 R1
6 C6
5 C7
R3
R4
R5
R6
DOUT
VDD
D7
VSS
1
2
3
4
5
6
7
8
R1 1
R2 2
16 R 2
R3 3
15 R 1
R4 4
1 4 A IN D O U T 5
13 C 1
VDD 6
12 C 2
D7 7
11 C 3
NC 8
10 C 4
NC 9
9 C5
V S S 10
2 0 A IN
19 C 1
18 C 2
17 C 3
16 C 4
15 C 5
14 C 6
13 C 7
12 C 8
11 LE D
R1
R2
R3
R4
DOUT
VDD
D7
R5
R6
VSS
1
2
3
4
5
6
7
8
9
10
2 0 A IN
19 C 1
18 C 2
17 C 3
16 C 4
15 C 5
14 C 6
13 C 7
12 C 8
11 LE D
R3
R4
R5
R6
R7
R8
DOUT
VDD
D7
NC
NC
VSS
1
2
3
4
5
6
7
8
9
10
11
12
24 R 2
23 R 1
2 2 A IN
21 C 1
20 C 2
19 C 3
18 C 4
17 C 5
16 C 6
15 C 7
14 C 8
13 LE D
H T6220A
8 S O P -A
H T6220A
1 6 N S O P -A
H T6221A
2 0 S O P -A
H T6221B
2 0 S O P -A
H T6222A
2 4 S O P -A
Pin Description
HT6222A
Pin No. Pin Name I/O Internal Connection
Description
1~6 R3~R8 I CMOS IN, Pull-low Row control for keyboard matrix, active high
7
DOUT
O
NMOS OUT
Serial data output pin, with a 38kHz carrier
8
VDD
¾
¾ Positive power supply, 2.0V~3.6V for normal operation
9 D7
I
CMOS IN
Most significant data bit (D7) code setting
10, 11 NC
¾
¾ No connection
12 VSS ¾
¾ Negative power supply, ground
13 LED O
CMOS OUT
Transmission enable indicator output
14~21 C8~C1 I/O CMOS IN/OUT, Pull-low Column control for keyboard matrix
22 AIN
I
CMOS IN, Pull-high
Pull-low
Low byte address codes (8 bits) scan input
23~24 R1~R2 I CMOS IN, Pull-low Row control for keyboard matrix, active high
Approximate Internal Connection Circuits
C M O S IN /O U T
V DD
C M O S IN /O U T
P u ll- lo w
C M O S IN
P u ll- lo w
C M O S IN
CM OS OUT
V DD
NM OS OUT
Rev. 1.20
2 October 12, 2010



Holtek Semiconductor HT6221B
HT6220A/HT6221A/HT6221B/HT6222A
Absolute Maximum Ratings
Supply Voltage ..............................VSS-0.3V to VSS+6V
Input Voltage..............................VSS-0.3V to VDD+0.3V
Storage Temperature ............................-50°C to 125°C
Operating Temperature...........................-20°C to 75°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 reliability.
Electrical Characteristic
Symbol
Parameter
VDD
ISTB
IDD
IOL1
IOH2
IOL2
IOH3
IOL3
VIH1
VIL1
VIH2
VIL2
VIH3
VIL3
RPH1
RPL1
RPL2
RPL3
Operating Voltage
Standby Current
Operating Current
Output Sink Current for DOUT
Output Source Current for LED
Output Sink Current for LED
Output Source Current for C1~C8
Output Sink Current for C1~C8
Input High Voltage for R1~R8
Input Low Voltage for R1~R8
Input High Voltage for C1~C8
Input Low Voltage for C1~C8
Input High Voltage for AIN
Input Low Voltage for AIN
Input Pull-high Resistance for AIN
Input Pull-low Resistance for AIN
Input Pull-low Resistance for R1~R8
Input Pull-low Resistance for C1~C8
Test Conditions
VDD Conditions
¾¾
3V Oscillator stops
3V fOSC=455kHz, no load
3V VO=0.6V
3V VO=2.7V
3V VO=0.3V
3V VO=2.7V
3V VO=0.3V
3V ¾
3V ¾
3V ¾
3V ¾
3V ¾
3V ¾
3V VIN=0V
3V VIN=3V
3V VIN=3V
3V VIN=3V
Min.
2.0
¾
¾
300
-10
1
-0.6
10
1.9
0
1.6
0
1.5
0
100
70
120
300
Typ.
3.0
0.1
600
350
-60
2
-2.0
30
¾
¾
¾
¾
¾
¾
200
150
200
500
Ta=25°C
Max. Unit
3.6
1.0
900
¾
¾
¾
¾
¾
3.0
0.8
3.0
0.6
3.0
0.6
400
250
320
1500
V
mA
mA
mA
mA
mA
mA
mA
V
V
V
V
V
V
kW
kW
kW
kW
fOSC
System Frequency
3V Ta=25°C
2.0V~
3.6V
0°C < Ta < 70°C
450.45 455 459.55 kHz
445.90 455 464.10 kHz
Note: fOSC specification is guaranteed by design under 0°C < Ta < 70°C and not subject to production testing.
Rev. 1.20
3 October 12, 2010





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