HOLTEK HT6P237A

HT6P237A/HT6P247A
Learning RF Encoder
Features
General Description
• Operating voltage: 2.0V ~3.6V
The HT6P2x7A devices form a series of data encoders
which include fully integrated ASK transmitters for
remote control system applications. These highly
integrated devices are true “switch-in, antenna-out”
monolithic devices. They encode 22 or 28 bits of
information and then serially transmits the data out
on their PAOUT pin upon receipt of transmission
enable (Data pins: D0~D3 or B0~B1) signals. They
encode address and data information into a coded
waveform suitable for modulation and transmission
using their integrated RF circuits. The devices offer
high performance in two areas: power delivery
and operating temperature. In terms of power, the
devices are capable of delivering +16 dBm into a 50Ω
load. This power level enables a small form factor
transmitter such as a key fob transmitter to operate
with a maximum distance. In terms of temperature,
they can operate from -40˚C to 85˚C with very little
frequency drift. They additionally offer exceptional
ease of use and can easily pass FCC/ETSI regulations.
One only needs a few additional components for
harmonic filtering. The devices are used with ASK/
OOK (Amplitude Shift Keying/On-Off Keyed) UHF
receiver types from wide-band super-regenerative
radios to narrow-band, high performance superheterodyne receivers to form a complete remote
system.
• Average Operating Current:
♦♦
♦♦
20mA @ VDD=3.0V, 12dBm;
30mA @ VDD=3.0V, 16dBm
• Standby current: 1.0μA (Max.) @ VDD=3V
• HT6P237A codes are fully compatible with
HT6P20B
• Up to 4 data pins
• Providing 2 compound data trigger pins
• Up to 224 address codes
• 8 bit time option via 2 pin selection
• Integrated complete UHF transmitter
• Frequency range 300MHz to 450MHz
• Supports ASK/OOK modulation
• 3 output power levels 12dBm/14dBm/16dBm via 1 pin selection
• Minimal external components
• 16-Pin NSOP package
Applications
• Burglar alarm systems
• Smoke and fire alarm systems
• Car alarm systems
• Garage door remote controllers
• Home Security systems
• Other remote control systems
Rev. 1.00
1
April 12, 2013
HT6P237A/HT6P247A
Block Diagram
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Selection Table
Part No.
VDD
Addr. No. Data No.
Compound
Data No.
Trig.
Frequency Band
RF Type
Package
HT6P237A 2.0V~3.6V
22
2
2
Data Low
300MHz~450MHz
ASK TX
16NSOP
HT6P247A 2.0V~3.6V
24
4
2
Data Low
300MHz~450MHz
ASK TX
16NSOP
Rev. 1.00
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April 12, 2013
HT6P237A/HT6P247A
Pin Description
Pin No.
Pin Name
I/O
Internal
Connection
Description
1~2
B1~B0
I
CMOS IN
Compound pin – D0~D3 for B0 and D1~D2 for B1 in HT6P247A
Compound pin – D0~D1 for B0 in HT6P237A
3~4
BTS1~BTS0
I
CMOS IN
Bit Time Select Pins Set to VDD, floating or ground to select 8 bit
width types
5
OPS
I
CMOS IN
Output Power Select Pin. Set to VDD, floating or ground to select
one of 3 power output levels
VDD: 16dBm, Floating: 14dBm, Gnd: 12dBm
6
VDD
P
—
Positive power supply
7/15
VSS
P
—
Negative power supply, ground
Pin 15 in the HT6P237A should be grounded
8
PAOUT
O
9
PVSS
P
—
10
XIN
I
Oscillator
13.56MHz Crystal oscillator input for 433.92MHz RF
11
XOUT
O
Oscillator
13.56MHz Crystal oscillator output for 433.92MHz RF
12
DOUT
O
CMOS OUT
13~16
D0~D3
I
CMOS IN
Data input and transmission enable; active low
16
BTSGS
(HT6P237A only)
I
CMOS IN
Bit time group select
0: Bit time group 1
1: Bit time group 2
This pin must be either high or low and not allowed to float
Power Amplify
L/C matching circuit
Output
RF negative power supply, ground
Encoder data out
Approximate Internal Connections
Rev. 1.00
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April 12, 2013
HT6P237A/HT6P247A
Absolute Maximum Ratings
Logic Supply Voltage.................VSS-0.3V to VSS+3.6V
Storage Temperature............................. -55˚C to 150˚C
Operating Temperature........................... -40˚C to 85˚C
Logic Input Voltage................... VSS-0.3V to VDD+0.3V
Logic Output Voltage................ VSS-0.3V to VDD+0.3V
Note: These are stress ratings only. Stresses exceeding the range specified under ”Absolute Maximum Ratings”
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.
D.C. Characteristics
Symbol
Ta=25°C
Test condition
Parameter
VDD
Min.
Typ.
Max.
2.0
3
3.6
V
—
—
1.0
μA
—
0.8VDD
—
—
V
—
condition
—
Unit
VDD
Logic Supply Voltage
—
ISB
Stand-by current
3
VIH
“H” Input Voltage
—
VIL
“L” Input Voltage
—
—
—
0.2VDD
V
RPL
Pull-high Resistance
3
D0~D3, B0~B1
—
500
—
kΩ
IOH
Hi-level output current
3
VOH=0.9VDD; DOUT
—
7
—
mA
IOL
Low-level output current
3
VOL=0.1VDD; DOUT
—
2
—
mA
No load. Input pins floating
R.F. Characteristics
Specifications apply for VDD=3.0V, TA=25°C, Freq 433MHz unless otherwise noted. RL 50Ω load (matched)
P
Parameter
Test Conditions
VDD
I1
Average Data Current*
(Data is 50% duty cycle)
3V
I0
Data LOW current
3V
Min
Conditions
@ 433MHz, POUT=+16dBm
—
@ 433MHz, POUT=+12dBm
—
Typ
21
12
Max
Units
—
mA
mA
—
5
—
RF and Crystal
Output power level
3V
OPS
0
—
12
—
Floating
—
14
—
1
—
16
—
—
76
—
dBc
dBm
Extinction ratio for ASK
10Kbps
3V
Output Blanking
3V STDBY transition from Low to High
—
1800
—
μs
ASK to RF Out Response
Time
Delta between ASK Input Transition from Low to
3V
High to RF Output Transition from Low to High
—
1
—
μs
Harmonic output for
433.92 MHz
3V
—
dBc
Occupied Bandwidth
3V @433.92MHz
—
kHz
—
dBc/Hz
—
pF
—
@867.84MHz, 2nd harm
@1301.76MHz, 3rd harm
—
@100kHz from Carrier
433.92 MHz Single Side
Band Phase Noise
3V
XTLIN, XTLOUT
3V Pin capacitance
—
@1000kHz from Carrier
—
—
-50
-51
<1000
-70
-75
15
Note: It is recommended that VDD power on stability time should be less than 500μs to allow the device to operate
normally.
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April 12, 2013
HT6P237A/HT6P247A
Functional Description
Code bits
The devices encode both address and data information
into an encoded waveform and output it on DOUT.
This waveform is fed to the RF modulator for
transmission purposes.
A code bit is the basic component of the encoded
waveform, and can be classified as either an address/data
bit or a pilot-code which is a synchronous bit.
Normal Operation
Address/Data bit waveform
The devices encode and transmits the address/data
information to a decoder upon receipt of a trigger
signal. The transmission function of the series are
enabled by the data inputs, which are the active low
pins D0~D3 and B0~B1. The following diagram
shows the transmission timing of these devices.
An address/data bit can be designated as either a ”0”
or “1” bit depending upon its waveform type. A one
bit waveform consists of one pulse cycle, as shown in
the following diagram.
1λ
D0~D3, B0, B1
t DW
1ms
(typ.)
1λ
Pilot Address/Data/End
code code
Address/Data bit
Note: 1. A “0” consists of a “low” pulse for 1λ then a
“high” pulse for 2λ.
The transmission sequence is Pilot, Address, Data,
End code.
2. A “1” consists of a “low” pulse for 2λ then a
“high” pulse for 1λ.
D0~D3, B0, B1
< 1 pilot code 1pilot code<Active<1 code word
> 1 code word
One-Bit Data Width
DOUT
There are 8 different one-bit data widths as shown in
the following table. They are selected by the control
pins BTS1 and BTS0. In the table “F” refers to a
floating input level.
1 code word
Transmission Timing Diagram
tDW
2λ
Bit “1”
DOUT
Symbol
2λ
Bit “0”
Parameter
One bit data width
(tDW) @433.92MHz
Pin condition
BTS1/BTS0
Group 1
Group2
0/0
1.1
0.4
0/F
1.2
0.5
0/1
1.3
0.6
F/0
1.4
0.7
F/F
1.5
0.8
F/1
1.6
0.9
1/0
1.76
2.0
1/ F
1.9
2.1
1/1
NC
NC
Unit
ms
—
Note: 1. Group2 is only available for the HT6P237A.
2. The BTS0 and BTS1 pins can be set either high, low or floating.
3. The BTS0 and BTS1 pins should never be both high as this may cause erroneous operation.
4. If there is an overlap bit time range then select the closest typical bit time. For example if the desired bit
time is 1.46ms, choosing the 1.5ms setting is best.
5. For other frequencies, the bit time will be the ratio of 433.92/freq. For example, for a frequency of
315MHz, the bit time 1.1ms will be 1.1×433.92/315=1.51ms.
Rev. 1.00
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April 12, 2013
HT6P237A/HT6P247A
Synchronous bit Waveform
Operation Flowchart
The synchronous bit waveform is 8-bits long and
exhibits a low pulse for 23λ followed by a high pulse
for 1λ as shown in the following below:
Power ON
Stand-By Mode
1λ
Pilot code
23λ
No
Code Word
A group of code bits is called a code word. A code
word consists of a Pilot-code (Synchronous bit)
followed by the address/data bits and end-code as
shown in the following diagram.
Yes
1 word of
pilot/address/data/end
transmitted
• HT6P237A
Pilot-code
A0~A21
D1~D0
“0101”
A0~A23
D3~D0
“0101”
• HT6P247A
Pilot-code
Data input Pin in
Low State
No
Data input Pin
still in Low
State
Yes
Application Circuit
Rev. 1.00
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April 12, 2013
HT6P237A/HT6P247A
Rev. 1.00
7
April 12, 2013
HT6P237A/HT6P247A
Package Information
Note that the package information provided here is for consultation purposes only. As this information may be
updated at regular intervals users are reminded to consult the Holtek website for the latest version of the package
information.
Additional supplementary information with regard to packaging is listed below. Click on the relevant section to be
transferred to the relevant website page.
• Further Package Information (include Outline Dimensions, Product Tape and Reel Specifications)
• Packing Meterials Information
• Carton information
• PB FREE Products
• Green Packages Products
Rev. 1.00
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April 12, 2013
HT6P237A/HT6P247A
16-pin NSOP (150mil) Outline Dimensions
MS-012
Symbol
Nom.
Max.
A
0.228
―
0.244
B
0.150
―
0.157
C
C‫׳‬
0.012
―
0.020
0.386
―
0.402
D
―
―
0.069
E
―
0.050
―
F
0.004
―
0.010
G
0.016
―
0.050
H
0.007
―
0.010
α
0°
―
8°
Symbol
Rev. 1.00
Dimensions in inch
Min.
Dimensions in mm
Min.
Nom.
Max.
A
5.79
―
6.20
B
3.81
―
3.99
C
C‫׳‬
0.30
―
0.51
9.80
―
10.21
D
―
―
1.75
E
―
1.27
―
F
0.10
―
0.25
G
0.41
―
1.27
H
0.18
―
0.25
α
0°
―
8°
9
April 12, 2013
HT6P237A/HT6P247A
Copyright© 2013 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.
Rev. 1.00
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April 12, 2013