Data Sheet

HT6221/HT6222
Multi-Purpose Encoders
Features
· Operating voltage: 1.8V~3.5V
· Three double-active keys
· DOUT with 38kHz carrier for IR medium
· Maximum active keys
· Low standby current
- HT6221: 32 keys
- HT6222: 64 keys
· Minimum transmission word: one word
· Low power and high noise immunity CMOS
· 455kHz ceramic resonator or crystal
technology
· 16-bit address codes
· HT6221: 20-pin SOP package
· 8-bit data codes
HT6222: 24-pin SOP package
· PPM code method
Applications
· Television and video cassette recorder controllers
· Car door controllers
· Burglar alarm systems
· Car alarm systems
· Smoke and fire alarm systems
· Security systems
· Garage door controllers
· 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.
The HT6221/HT6222 contain 32 keys (K1~K32) and 64
keys (K1~K64), respectively. When one of the keys is
triggered, the programmed address/data is transmitted
together with the header bits via an IR (38kHz carrier)
transmission medium.
Block Diagram
X 2
X 1
O s c illa to r
R 1
R 8
Rev. 1.70
D iv id e r
K e y b o a rd
M a tr ix &
G a te
C ir c u it
D a ta R O M
& R e g is te r s
C 1
A IN
C 8
D a ta S e le c t
& B u ffe r
¸ 2 4 C o u n te r &
1 o f 2 4 D e c o d e r
D O U T
L E D
S y n c .
C ir c u it
B in a r y D e te c to r
V D D
D 7
1
V S S
February 20, 2009
HT6221/HT6222
Pin Assignment
R 3
1
2 4
R 2
R 4
2
2 3
R 1
R 1
1
2 0
A IN
R 5
3
2 2
A IN
R 2
2
1 9
C 1
R 6
4
2 1
C 1
R 3
3
1 8
C 2
R 7
5
2 0
C 2
R 4
4
1 7
C 3
R 8
6
1 9
C 3
D O U T
5
1 6
C 4
D O U T
7
1 8
C 4
V D D
6
1 5
C 5
V D D
8
1 7
C 5
D 7
7
1 4
C 6
D 7
9
1 6
C 6
X 2
8
1 3
C 7
X 2
1 0
1 5
C 7
X 1
9
1 2
C 8
X 1
1 1
1 4
C 8
1 0
1 1
L E D
V S S
1 2
1 3
L E D
V S S
H T 6 2 2 1
2 0 S O P -A
H T 6 2 2 2
2 4 S O P -A
Pin Description
HT6222
Pin No.
Pin Name
I/O
Internal Connection
Description
1~6
R3~R8
I
CMOS IN, Pull-low
7
DOUT
O
CMOS OUT
Row control for keyboard matrix, active high
8
VDD
¾
¾
9
D7
I
CMOS IN
10
X2
O
OSCILLATOR
455kHz resonator oscillator output
11
X1
I
OSCILLATOR
455kHz resonator oscillator input
12
VSS
¾
¾
13
LED
O
CMOS OUT
14~21
C8~C1
I/O
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
Serial data output pin, with a 38kHz carrier
Positive power supply, 1.8V~3.5V for normal operation
Most significant data bit (D7) code setting
Negative power supply, ground
Transmission enable indicator output
CMOS IN/OUT, Pull-low Column control for keyboard matrix
Approximate Internal Connection Circuits
C M O S IN /O U T
V
C M O S IN /O U T
P u ll- lo w
D D
C M O S IN
P u ll- lo w
C M O S IN
C M O S O U T
V
D D
O S C IL L A T O R
X 2
X 1
1 0 M W
E N
Rev. 1.70
2
March 9, 2009
HT6221/HT6222
Absolute Maximum Ratings
Supply Voltage ..............................VSS-0.3V to VSS+6V
Storage Temperature ............................-50°C to 125°C
Input Voltage..............................VSS-0.3V to VDD+0.3V
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
Ta=25°C
Test Conditions
VDD
Conditions
¾
Min.
Typ.
Max.
Unit
1.8
3
3.5
V
VDD
Operating Voltage
¾
ISTB
Standby Current
3V
Oscillator stops
¾
0.1
1.0
mA
IDD
Operating Current
3V
fOSC=455kHz, no load
¾
200
400
mA
IOH1
Output Source Current for DOUT
3V
VO=2.7V
-2.0
-4.0
¾
mA
IOL1
Output Sink Current for DOUT
3V
VO=0.3V
50
100
¾
mA
IOH2
Output Source Current for LED
3V
VO=2.7V
-10
-60
¾
mA
IOL2
Output Sink Current for LED
3V
VO=0.3V
1.2
2.0
¾
mA
IOH3
Output Source Current for C1~C8
3V
VO=2.7V
-0.6
-2.0
¾
mA
IOL3
Output Sink Current for C1~C8
3V
VO=0.3V
10
30
¾
mA
VIH1
Input High Voltage for R1~R8
3V
¾
1.9
¾
3.0
V
VIL1
Input Low Voltage for R1~R8
3V
¾
0
¾
0.8
V
VIH2
Input High Voltage for C1~C8
3V
¾
1.6
¾
3.0
V
VIL2
Input Low Voltage for C1~C8
3V
¾
0
¾
0.6
V
VIH3
Input High Voltage for AIN
3V
¾
1.25
¾
3.0
V
VIL3
Input Low Voltage for AIN
3V
¾
0
¾
0.6
V
RPH1
Input Pull-high Resistance for AIN
3V
VIN=0V
100
200
400
kW
RPL1
Input Pull-low Resistance for AIN
3V
VIN=3V
70
150
250
kW
RPL2
Input Pull-low Resistance for R1~R8
3V
VIN=3V
120
200
320
kW
RPL3
Input Pull-low Resistance for C1~C8
3V
VIN=3V
300
500
1500
kW
fOSC
System Frequency
¾
455kHz ceramic resonator
¾
455
¾
kHz
Rev. 1.70
3
March 9, 2009
HT6221/HT6222
Functional Description
When one of the keys (32 or 64 keys) is triggered for over
36ms, the oscillator is enabled and the chip is activated. If
the key is pressed and held for 108ms or less, the 108ms
transmission codes are enabled and comprised of a
header code (9ms), an off code (4.5ms), low byte address
codes (9ms~18ms), high byte address codes
(9ms~18ms), 8-bit data codes (9ms~18ms), and the inverse codes of the 8-bit data codes (18ms~9ms). After the
pressed key is held for 108ms, if the key is still held down,
the transmission codes turn out to be a composition of
header (9ms) and off codes (2.5ms) only.
Keyboard Scan
The HT6221/HT6222 remain in the halt mode during the
standby state (at this time, the oscillator 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
C 1
C 2
C 3
C 4
C 5
C 6
C 7
C 8
R 1
K 1
R 2
K 2
K 5
K 9
K 1 3
K 1 7
K 2 1
K 2 5
K 2 9
K 6
K 1 0
K 1 4
K 1 8
K 2 2
K 2 6
K 3 0
R 3
K 3
K 7
K 1 1
K 1 5
K 1 9
K 2 3
K 2 7
K 3 1
R 4
K 4
K 8
K 1 2
K 1 6
K 2 0
K 2 4
K 2 8
K 3 2
To avoid mistakes made by keyboard scanning or simultaneous two-key inputs (except for the three double-key
active functions (K21+K22, K21+K23, and K21+K24),
the HT6221/HT6222 are facilitated with 36ms starting
time.
· The HT6222 keyboard form
C 1
C 2
C 3
C 4
C 5
C 6
C 7
C 8
R 1
K 1
K 5
K 9
K 1 3
K 1 7
K 2 1
K 2 5
K 2 9
R 2
K 2
K 6
K 1 0
K 1 4
K 1 8
K 2 2
K 2 6
K 3 0
R 3
K 3
K 7
K 1 1
K 1 5
K 1 9
K 2 3
K 2 7
K 3 1
R 4
K 4
K 8
K 1 2
K 1 6
K 2 0
K 2 4
K 2 8
K 3 2
R 5
K 3 3
K 3 7
K 4 1
K 4 5
K 4 9
K 5 3
K 5 7
K 6 1
R 6
K 3 4
K 3 8
K 4 2
K 4 6
K 5 0
K 5 4
K 5 8
K 6 2
K 3 5
K 3 9
K 4 3
K 4 7
K 5 1
K 5 5
K 5 9
K 6 3
K 3 6
K 4 0
K 4 4
K 4 8
K 5 2
K 5 6
K 6 0
K 6 4
R 7
R 8
The HT6221/HT6222 also provide three double-key active functions (K21+K22, K21+K23, and K21+K24) for
tape deck recording operations. The double-key operation rules are shown in timing 4 and timing 6.
Transmission Codes
The transmission codes of the HT6221/HT6222 consist
of a 9ms header code, a 4.5ms off code, 16-bit address
codes (18ms~36ms), 9ms~18ms 8-bit data codes, and
the inverse code of the 8-bit data codes. The following is
an illustration of the transmission codes:
K e y - in
(K 1 ~ K 6 4 )
K e y E n a b le s
3 6 m s m in .
X 2
F o s c = 4 5 5 k H z
4 .5 m s
0 .5 6 m s
D O U T
9 m s
4 5 m s ~ 6 3 m s
(A 0 ~ A 1 5 + D 0 ~ D 7 + D 0 ~ D 7 )
9 m s
3 8 k H z ,
3 3 % d u ty c a r r ie r
2 .5 m s
0 .5 6 m s
9 m s
2 .5 m s
1 0 8 m s
1 0 8 m s
Output Format for the DOUT
The output code carrier of the DOUT pin is shown in Timing 2:
3 8 k H z
C a r r ie r
8 .7 7 m s
2 6 .3 m s
38kHz Carrier
Rev. 1.70
4
March 9, 2009
HT6221/HT6222
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:
3 8 k H z c a r r ie r
"Z e ro "
0 .5 6 m s
d a ta p e r io d ( 1 .1 2 m s )
3 8 k H z c a r r ie r
"O n e "
d a ta p e r io d ( 2 .2 4 m s )
Logic States
· Setting the address codes (A0~A15)
the external switch S0~S7 and the ROM1. The
A8~A15 equal some bits inverted to A0~A7, the inversion 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).
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
H T 6 2 2 1 /H T 6 2 2 2
A IN
C 1
C 2
C 3
C 4
C 5
C 6
C 7
C 8
2 0 0 k W ´ 8
S 8
S 9
S 1 0
S 1 1
S 1 2
S 1 3
S 1 4
S 1 5
1 N 4 1 4 8 ´ 8
S 0
S 1
S 2
S 3
S 4
S 5
S 6
S 7
( S w itc h O p e n : 0 , S w itc h C lo s e : 1 )
E x te r n a l S w itc h S 0 ~ S 1 5 :
O n - c h ip R O M 1 , R O M 2 :
A 0 ~ A 7 :
1
0
0
0
b it0
0
1
0
0
0
1
0
0
1
0
0
0
0
S 0 ~ S 7 O R R O M 1
0
0
1
1
0
1
0
b it7
Rev. 1.70
0
0
b it0
1
A 0 A 1 A 2
1
1
0
A 3
1
A 4 A 5 A 6
0
1
1
5
1
A 7
1
0
0
0
A 8 '~ A 1 5 ':
A 8 ~ A 1 5 :
0
0
0
0
0
1
0
0
0
0
S 8 ~ S 1 5 O R R O M 2
1
0
0
1
0
0
b it7
0
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
March 9, 2009
HT6221/HT6222
· Values of the data codes (D0~D7)
Table 3: Double-key data code table
The HT6221/HT6222 contain 32 and 64 active keys, respectively. Each key corresponds to a data code. For
tape deck recording, the HT6221/HT6222 provide three
double-key functions. The double-key, single-key, and
double-key operation rules are shown in Table 3, Table 4, Timing 4, Timing 5 and Timing 6.
KEY
Data Codes
D0~D6
Data Code D7
K21+K22
1010110
0/1
K21+K23
0110110
0/1
K21+K24
1110110
0/1
Note: D7 is defined by an external switch
Table 4: K1~K64 single-key data code table
KEY
Data Codes
D0~D6
Data Code
D7
KEY
Data Codes
D0~D6
Data Code
D7
K1
0000 000
0/1
K33
0000 001
0/1
K2
1000 000
0/1
K34
1000 001
0/1
K3
0100 000
0/1
K35
0100 001
0/1
K4
1100 000
0/1
K36
1100 001
0/1
K5
0010 000
0/1
K37
0010 001
0/1
K6
1010 000
0/1
K38
1010 001
0/1
K7
0110 000
0/1
K39
0110 001
0/1
K8
1110 000
0/1
K40
1110 001
0/1
K9
0001 000
0/1
K41
0001 001
0/1
K10
1001 000
0/1
K42
1001 001
0/1
K11
0101 000
0/1
K43
0101 001
0/1
K12
1101 000
0/1
K44
1101 001
0/1
K13
0011 000
0/1
K45
0011 001
0/1
K14
1011 000
0/1
K46
1011 001
0/1
K15
0111 000
0/1
K47
0111 001
0/1
K16
1111 000
0/1
K48
1111 001
0/1
K17
0000 100
0/1
K49
0000 101
0/1
K18
1000 100
0/1
K50
1000 101
0/1
K19
0100 100
0/1
K51
0100 101
0/1
K20
1100 100
0/1
K52
1100 101
0/1
K21
0010 100
0/1
K53
0010 101
0/1
K22
1010 100
0/1
K54
1010 101
0/1
K23
0110 100
0/1
K55
0110 101
0/1
K24
1110 100
0/1
K56
1110 101
0/1
K25
0001 100
0/1
K57
0001 101
0/1
K26
1001 100
0/1
K58
1001 101
0/1
K27
0101 100
0/1
K59
0101 101
0/1
K28
1101 100
0/1
K60
1101 101
0/1
K29
0011 100
0/1
K61
0011 101
0/1
K30
1011 100
0/1
K62
1011 101
0/1
K31
0111 100
0/1
K63
0111 101
0/1
K32
1111 100
0/1
K64
1111 101
0/1
Note: D7 is defined by an external switch
D7=0 : connect to VDD
D7=1 : connect to VSS
Rev. 1.70
6
March 9, 2009
HT6221/HT6222
K 2 1 In p u t
K m
K 2 1
In p u t
K m
3 6 m s
D O U T
3 6 m s < t < 1 2 6 m s
1 0 8 m s ( m in .)
3 6 m s
K 2 1 c o d e tr a n s m is s io n
(a )
K 2 1 In p u t
K m
K 2 1
In p u t
K m
0 < t < 3 6 m s
N o tr a n s m is s io n
D O U T
(b )
K 2 1 In p u t
K 2 1
0 < t < 3 6 m s
K m
In p u t
K m
N o tr a n s m is s io n
D O U T
(c )
K 2 1 In p u t
K m
K 2 1
In p u t
K m
3 6 m s
3 6 m s < t < 1 2 6 m s
3 6 m s
D O U T
1 0 8 m s ( m in .)
K m
c o d e tr a n s m is s io n
(d )
Invalid Double-Key Input
K n In p u t
K n
3 6 m s
t > 1 0 8 m s
D O U T
K n c o d e tr a n s m is s io n
(a )
K n In p u t
K n
t < 1 0 8 m s
3 6 m s
D O U T
1 0 8 m s
K n c o d e tr a n s m is s io n
(b )
Note: Kn can be one of K1~K64
Valid Single-Key Input
Rev. 1.70
7
March 9, 2009
HT6221/HT6222
K 2 1 In p u t
K m
K 2 1
In p u t
K m
3 6 m s
3 6 m s
D O U T
t > 1 2 6 m s
1 0 8 m s ( m in .)
K 2 1 c o d e tr a n s m is s io n
K 2 1 + K m c o d e
tr a n s m is s io n
Note: Km can be one of K22~K24
Valid Double-Key Input
DOUT and LED
After the transmission codes are sent, the DOUT pin generates transmission codes with a carrier, and the LED goes
low to drive a transmission indicator.
Application Circuits
Application Circuit 1
V
D D
1 .8 V ~ 3 .5 V
In fra re d
4 7 m F /1 6 V
3 3 0 W
4 7 W
1 0 0 p F
1 0 0 p F
1 k W
L E D
4 5 5 k H z
c e r a m ic r e s o n a to r
9
8
X 1
7
1 1
X 2
5
6
L E D
D O U T
V D D
H T 6 2 2 1
D 7
C 1
C 2
1 9
5 1 k W ´ 8
C 3
1 8
C 4
1 7
C 5
1 6
C 6
1 5
V S S
C 7
1 4
C 8
1 3
R 1
1 2
K 1
K 5
K 9
K 1 3
K 1 7
K 2 1
K 2 5
K 2 9
K 2
K 6
K 1 0
K 1 4
K 1 8
K 2 2
K 2 6
K 3 0
K 3
K 7
K 1 1
K 1 5
K 1 9
K 2 3
K 2 7
K 3 1
K 4
K 8
K 1 2
K 1 6
K 2 0
K 2 4
K 2 8
K 3 2
R 2
1
R 3
2
8 0 5 0
R 4
3
1 0
A IN
4
2 0
1 N 4 1 4 8 ´ 8
Note: Typical infrared diode: EL-1L2 (KODENSHI CORP.)
Rev. 1.70
8
March 9, 2009
HT6221/HT6222
Application Circuit 2
V
D D
1 .8 V ~ 3 .5 V
In fra re d
4 7 m F /1 6 V
3 3 0 W
4 7 W
1 0 0 p F
1 0 0 p F
1 k W
4 5 5 k H z
c e r a m ic r e s o n a to r
1 0
1 1
X 1
9
X 2
1 3
8
L E D
V D D
D 7
8 0 5 0
7
D O U T
H T 6 2 2 2
C 1
C 2
2 1
5 1 k W ´ 8
C 3
2 0
C 4
1 9
C 5
1 8
C 6
1 7
C 7
1 6
C 8
1 5
R 1
1 4
K 1
K 5
K 9
K 1 3
K 1 7
K 2 1
K 2 5
K 2 9
K 2
K 6
K 1 0
K 1 4
K 1 8
K 2 2
K 2 6
K 3 0
K 3
K 7
K 1 1
K 1 5
K 1 9
K 2 3
K 2 7
K 3 1
K 4
K 8
K 1 2
K 1 6
K 2 0
K 2 4
K 2 8
K 3 2
K 3 3
K 3 7
K 4 1
K 4 5
K 4 9
K 5 3
K 5 7
K 6 1
K 3 4
K 3 8
K 4 2
K 4 6
K 5 0
K 5 4
K 5 8
K 6 2
K 3 5
K 3 9
K 4 3
K 4 7
K 5 1
K 5 5
K 5 9
K 6 3
K 3 6
K 4 0
K 4 4
K 4 8
K 5 2
K 5 6
K 6 0
K 6 4
V S S
R 2
2 3
R 3
2 4
R 4
1
R 5
2
R 6
3
R 7
4
R 8
5
1 2
A IN
6
2 2
1 N 4 1 4 8 ´ 8
Note: Typical infrared diode: EL-1L2 (KODENSHI CORP.)
Rev. 1.70
9
March 9, 2009
HT6221/HT6222
Package Information
20-pin SOP (300mil) Outline Dimensions
1 1
2 0
A
B
1
1 0
C
C '
G
H
D
E
a
F
· MS-013
Symbol
Rev. 1.70
Dimensions in mil
Min.
Nom.
Max.
A
393
¾
419
B
256
¾
300
C
12
¾
20
C¢
496
¾
512
D
¾
¾
104
E
¾
50
¾
F
4
¾
12
G
16
¾
50
H
8
¾
13
a
0°
¾
8°
10
March 9, 2009
HT6221/HT6222
24-pin SOP (300mil) Outline Dimensions
1 3
2 4
A
B
1 2
1
C
C '
G
H
D
E
a
F
· MS-013
Symbol
Rev. 1.70
Dimensions in mil
Min.
Nom.
Max.
A
393
¾
419
B
256
¾
300
C
12
¾
20
C¢
598
¾
613
D
¾
¾
104
E
¾
50
¾
F
4
¾
12
G
16
¾
50
H
8
¾
13
a
0°
¾
8°
11
March 9, 2009
HT6221/HT6222
Product Tape and Reel Specifications
Reel Dimensions
D
T 2
A
C
B
T 1
SOP 20W
Symbol
Description
Dimensions in mm
A
Reel Outer Diameter
330.0±1.0
B
Reel Inner Diameter
100.0±1.5
C
Spindle Hole Diameter
13.0+0.5/-0.2
D
Key Slit Width
T1
Space Between Flange
T2
Reel Thickness
2.0±0.5
24.8+0.3/-0.2
30.2±0.2
SOP 24W
Symbol
Description
Dimensions in mm
A
Reel Outer Diameter
B
Reel Inner Diameter
100.0±1.5
13.0+0.5/-0.2
C
Spindle Hole Diameter
D
Key Slit Width
T1
Space Between Flange
T2
Reel Thickness
Rev. 1.70
330.0±1.0
2.0±0.5
24.8+0.3/-0.2
30.2±0.2
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March 9, 2009
HT6221/HT6222
Carrier Tape Dimensions
P 0
D
P 1
t
E
F
W
C
D 1
P
B 0
K 0
A 0
R e e l H o le
IC
p a c k a g e p in 1 a n d th e r e e l h o le s
a r e lo c a te d o n th e s a m e s id e .
SOP 20W
Symbol
Description
Dimensions in mm
24.0+0.3/-0.1
W
Carrier Tape Width
P
Cavity Pitch
12.0±0.1
E
Perforation Position
1.75±0.10
F
Cavity to Perforation (Width Direction)
11.5±0.1
D
Perforation Diameter
1.5+0.1/-0.0
D1
Cavity Hole Diameter
1.50+0.25/-0.00
P0
Perforation Pitch
P1
Cavity to Perforation (Length Direction)
2.0±0.1
A0
Cavity Length
10.8±0.1
B0
Cavity Width
13.3±0.1
K0
Cavity Depth
3.2±0.1
4.0±0.1
t
Carrier Tape Thickness
0.30±0.05
C
Cover Tape Width
21.3±0.1
SOP 24W
Symbol
Description
Dimensions in mm
W
Carrier Tape Width
24.0±0.3
P
Cavity Pitch
12.0±0.1
E
Perforation Position
1.75±0.1
F
Cavity to Perforation (Width Direction)
11.5±0.1
D
Perforation Diameter
1.55+0.10/-0.00
D1
Cavity Hole Diameter
1.50+0.25/-0.00
P0
Perforation Pitch
4.0±0.1
P1
Cavity to Perforation (Length Direction)
2.0±0.1
A0
Cavity Length
10.9±0.1
B0
Cavity Width
15.9±0.1
K0
Cavity Depth
3.1±0.1
t
Carrier Tape Thickness
0.35±0.05
C
Cover Tape Width
21.3±0.1
Rev. 1.70
13
March 9, 2009
HT6221/HT6222
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)
G Room, 3 Floor, No.1 Building, No.2016 Yi-Shan Road, Minhang District, Shanghai, China 201103
Tel: 86-21-5422-4590
Fax: 86-21-5422-4705
http://www.holtek.com.cn
Holtek Semiconductor Inc. (Shenzhen Sales Office)
5F, Unit A, Productivity Building, Gaoxin M 2nd, Middle Zone Of High-Tech Industrial Park, ShenZhen, China 518057
Tel: 86-755-8616-9908, 86-755-8616-9308
Fax: 86-755-8616-9722
Holtek Semiconductor Inc. (Beijing Sales Office)
Suite 1721, Jinyu Tower, A129 West Xuan Wu Men Street, Xicheng District, Beijing, China 100031
Tel: 86-10-6641-0030, 86-10-6641-7751, 86-10-6641-7752
Fax: 86-10-6641-0125
Holtek Semiconductor Inc. (Chengdu Sales Office)
709, Building 3, Champagne Plaza, No.97 Dongda Street, Chengdu, Sichuan, China 610016
Tel: 86-28-6653-6590
Fax: 86-28-6653-6591
Holtek Semiconductor (USA), Inc. (North America Sales Office)
46729 Fremont Blvd., Fremont, CA 94538, USA
Tel: 1-510-252-9880
Fax: 1-510-252-9885
http://www.holtek.com
Copyright Ó 2009 by HOLTEK SEMICONDUCTOR INC.
The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes 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. 1.70
14
March 9, 2009