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C-MAX Time Solutions
Datasheet
CME6005
6- Pad Layout
Pin Layout SSO16
QC 1
16 NC
QC
QIN
GND
13
1
2
12
11
10
DEM
HLD
PK
QIN 2
GND 3
15 DEM
14 HLD
QOUT
VCC
IN 2
IN 1
3
4
5
6
7
9
8
PON
TCO
TCON
Th e PA D co or d in a te s
are referred to the left
bottom point of the contact
window
QOUT 4
VCC 5
IN 2 6
IN 1 7
CME6005
FB
13 PK
12 PON
11 TCO
10 TCON
Y-axis
X-axis
NC 8
9 NC
Reference point (%)
Figure 2. Pad layout
Figure 3. Pin layout SSO16
PIN Description
IN1, IN2
A ferrite antenna is connected between IN 1 and IN 2. For high sensitivity, the Q factor of the antenna circuit
should be as high as possible. Please note that a high Q factor requires temperature compensation of the
resonant frequency in most cases. We recommend a Q factor between 40 and 150, depending on the
application. An optimal signal-to-noise ratio will be achieved by a resonator resistance of 40 k ? to 100 k ? .
QOUT, QIN , QC
In order to achieve a high selectivity, a crystal is connected between the Pins QOUT and QIN. It is used with
the serial resonant frequency according to the time-code transmitter and acts as a serial resonator. Up to 2
crystals can be connected parallel between QOUT and QIN. For one crystal, the given parallel capacitor of
the filter crystal (about 1.4 pF) is internally compensated so that the bandwidth of the filter is about 10 Hz.
For two crystals, an additional external capacitor with the value of about 1.4 pF has to be connected parallel
between QC and QIN. The impedance of QIN is high. Parasitic loads have to be avoided.
DEM
Demodulator output. To ensure the function, an external capacitor has to be connected at this output.
HLD
AGC hold mode: HLD high (V HLD = V CC ) sets normal function, HLD low (V HLD = 0) holds for a short time the
AGC voltage. This can be used to prevent the AGC from peak voltages, created by e.g. a stepper motor
PK
Peak detector output. An external capacitor has to be connected to ensure the function of the AGC
regulation. The value of the capacitance influences the AGC regulation time.
NOTE: To realize a good regulation timing of the demodulator and the peak detector the value of the
capacitors at DEM and PK have to be changed for the different protocols.
SPEC No.
CME6005
Revision
A.8
State
04.12.06
C-MAX printed
03.05.2007
Version
English
Page
3 of 15
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