HTRC11001T 데이터 시트보기 (PDF) - Philips Electronics

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HTRC11001T

HITAG reader chip

Philips Electronics 

Philips Semiconductors

HITAG reader chip

Product specification

HTRC11001T

12 APPLICATION INFORMATION

Figure 4 shows a minimal application circuitry for the

HTRC11001T.

The reader coil La together with the capacitor Ca forms a

series resonant LC circuit (f0 = 125 kHz). The high

voltages in the LC circuit are divided to safe operating

levels by Rv and the internal resistor Ri behind pin RX.

The two capacitors connected to pin XTAL1 and

pin XTAL2 shall be the recommended values and types

from the data sheet of the crystal.

Alternatively to a crystal, a ceramic resonator can be used

or an external clock source can be connected to

pin XTAL1.

handbook, full pagewidth

VDD

10 µF

100 nF

Rv

Ca

La

VSS

TX2

VDD

TX1

MODE

XTAL1

XTAL2

1

14

2

13

3

12

HTRC11001T

4

11

5

10

6

9

7

8

RX

QGND

CEXT

n.c.

DOUT

DIN

SCLK

100 nF

100 nF

to microcontroller

MGW267

Fig.4 Minimum application circuitry.

2001 Nov 23

15

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