htrc110 NXP Semiconductors, htrc110 Datasheet - Page 7

• Manufacturer Part Number: htrc110
• Description: Hitag Reader Chip
• Manufacturer: NXP Semiconductors

HTRC110 Hitag Reader Chip
7.
The following figure shows a minimal application circuitry for the HTRC110. The reader coil L
together with the capacitor C
the LC circuit are divided to safe operating levels by R
the RX-pin. The two capacitors connected to XTAL1 and XTAL2 shall be the recommended values
and types from the crystal’s data sheet. Alternatively to a crystal a ceramic resonator can be used or
an external clock source can be connected to XTAL1.
8.
8.1.
The HTRC110 works with an external 5V±10% power supply at VDD. The maximum DC-current
is 10mA+Î
bypassed to ground with a 100nF capacitor close to the IC.
ant
Power Supply
Minimum Application Circuitry
Functional Description
*2/π = 137mA. For optimum performance, the power supply connection should be
a
forms a series resonant LC circuit (f = 125 kHz). The high voltages in
Figure 3: Minimum application circuitry
Page 7 of 30
Rev. 3.0
v
and the chip internal resistor R
dem_in
July 2006
behind
a