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Número de pieza | HT672B | |
Descripción | 13.56MHz RFID Transponder | |
Fabricantes | Holtek Semiconductor | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de HT672B (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
No Preview Available ! HT672B
13.56MHz RFID Transponder
www.DataSheet4U.com
Features
· Wide range operating voltage
· Batteryless RF transponder
· Data transmission in read-only operation
· 6-bits sync + 32-bits data + 8-bits CRC
· OTP data memory
· 13.56MHz carrier frequency
· Output data baud rate: 10kbps at VDD=3V
· PWM/ASK modulation
· Built-in voltage limiter
· 8-pin DIP package
Applications
· Interactive leisure products
· Security system
· Access control
· Anti-counterfeit devices
· Material management
· Animal management
· Personnel working time record
· Car park monitoring system
General Description
The HT672B is a RF transponder IC operating with
13.56MHz RF carrier, which provides a low cost
batteryless transponder solution with the addition of
merely an external inductor. The inductor and internal
capacitor form a LC tank which inducing voltage from
the radiated 13.56MHz carrier signal generated from the
reader antenna. HT672B has a built-in low power RC
oscillator which is activated if the induced carrier field
strength is high enough to supply the operating current
and the response signal(pre-programmed in the OTP
memory) is serial transmitted out. The response data is
transmitted using PWM/ASK modulation. Modulation of
13.56MHz is accomplished by damping the LC tank with
a fixed baud rate.
The transmission information is stored in 40 bits. One
Time Programmable memory (OTP) (up to 32 bits re-
served for customer) in the chip, with a 8-bits checksum
code. The effective detection range for a small sized an-
tenna is 2cm~10cm which is dependent on antenna for-
mat & reader design. The larger the antenna loop used
the longer the detection range. It is advisable to use
larger antenna to attain a 15cm detection range. Imple-
menting Holtek¢s advanced OTP and low power tech-
nology, HT672B offers a very cost effective solution for
RF contactless detection system. A code area of
32-bits(max.) wide is provided so customers can pro-
gram the device using the specified programmer sup-
plied by Holtek. The pre-programmed Ics are also
available upon customer¢s request.
Block Diagram
HF
H F1
S y s te m
C lo c k
G e n e ra to r
V C C L im ite r
and
R F L im ite r
F re q u e n c y
D r iv e r f/4
D a ta
P r o c e s s in g
P W M /A S K
M o d u la to r
S h ift
R e g is te r
D a ta
T e s t B lo c k
V P P C LK
VDD
VSS
Rev. 1.10
1 November 23, 2004
1 page 1-chip Solution (I)
H o lte k T r a n s p o n d e r S o lu tio n
www.DataSheet4U.com
E n e rg y
H T672B
ANT
D a ta
HT672B
H o lte k R e a d e r S o lu tio n
R F osc
ANT &
R e c e iv e r
D a ta
D ecode
&
S y s te m
C o n tro l
F u n c tio n
C o n tro l
1-chip Solution (II)
H o lte k T r a n s p o n d e r S o lu tio n
E n e rg y
H T672B
ANT
D a ta
H o lte k S ta n d a r d M C U :
H T 4 8 X X X /H T 4 9 X X X
H o lte k R e a d e r S o lu tio n
ANT
R F osc
&
R e c e iv e r
D a ta
D ecode
&
S y s te m
C o n tro l
F u n c tio n
C o n tro l
D a ta , V o ic e
orLC D
D is p la y
P r o c e s s in g
H o lte k E m b e d d e d M C U :
H T G 2 1 X X /H T 8 6 X X X
Rev. 1.10
5 November 23, 2004
5 Page |
Páginas | Total 8 Páginas | |
PDF Descargar | [ Datasheet HT672B.PDF ] |
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