HTRC11001 Philips Semiconductors, HTRC11001 Datasheet - Page 15

• Manufacturer Part Number: HTRC11001
• Description: HITAG reader chip
• Manufacturer: Philips Semiconductors

Philips Semiconductors
12 APPLICATION INFORMATION
Figure 4 shows a minimal application circuitry for the
HTRC11001T.
The reader coil L
series resonant LC circuit (f
voltages in the LC circuit are divided to safe operating
levels by R
The two capacitors connected to pin XTAL1 and
pin XTAL2 shall be the recommended values and types
from the data sheet of the crystal.
2001 Nov 23
handbook, full pagewidth
HITAG reader chip
v
and the internal resistor R
a
together with the capacitor C
0
= 125 kHz). The high
R v
L a
C a
i
behind pin RX.
V DD
Fig.4 Minimum application circuitry.
100 nF
10 F
XTAL1
XTAL2
MODE
a
V DD
V SS
TX2
TX1
forms a
1
2
3
4
5
6
7
HTRC11001T
15
Alternatively to a crystal, a ceramic resonator can be used
or an external clock source can be connected to
pin XTAL1.
MGW267
14
13
12
11
10
9
8
RX
QGND
CEXT
n.c.
DOUT
DIN
SCLK
100 nF
100 nF
to microcontroller
HTRC11001T
Product specification