PCD3316T NXP Semiconductors, PCD3316T Datasheet - Page 8

• Manufacturer Part Number: PCD3316T
• Manufacturer: NXP Semiconductors

Specifications of PCD3316T

• Process Technology: CMOS
• Operating Frequency (max): 3580kHz
• Mounting: Surface Mount
• Lead Free Status / Rohs Status: Supplier Unconfirmed

Philips Semiconductors
9397 750 04824
Product specification
7.10 3.58 MHz oscillator circuitry
7.9 The internal Power-on reset (POR)
The device contains an on-chip Power-on reset circuitry which activates a reset as
long as V
3.58 MHz oscillator will start. The PCD3316 is initialized and the internal registers are
set to the default value (see
3.58 MHz clock to initialize all internal functions. The POR circuitry also ensures, that
the chip will be switched off as soon as a falling V
(V
The 3.58 MHz oscillator is needed for the FSK receiver and the CAS detection. This
on-chip Amplitude Controlled Oscillator (ACO) circuitry is a single-stage inverting
amplifier biased by an internal feedback resistor R
Figure
components are needed.
When using ceramic resonators to drive the oscillator, in some cases external
components are needed; refer to the ceramic resonator product specifications. Two
different configurations are shown in
To drive the device with an external clock source, apply the external clock signal to
HXIN, and leave HXOUT to float, as shown in
signal is less than V
needed as shown in
In the Power-down mode (Mode register 2, bit 7 = 0), the oscillator is stopped and
HXIN and HXOUT are internally pulled LOW. The current of the whole oscillator is
switched off.
Fig 5. Oscillator.
POR(L)
5. When using a quartz resonator to drive the oscillator, normally no external
).
DD
is below a predefined level V
handbook, halfpage
DD
Figure
11 March 1999
to DGND or a sine wave is applied, capacitive decoupling is
C1 e
PCD3316
6d.
Section
C1 i
1
HXIN
AMPLITUDE
CONTROL
7.13). It takes a maximum of 100 cycles of the
Figure 6a
R fb
POR(H)
Figure
and
. If V
on/off
DD
fb
. The oscillator circuit is shown in
Figure
DD
C2 i
reaches a predefined level
6c. If the amplitude of the input
exceeds V
HXOUT
2
C2 e
MGK723
6b.
© Philips Electronics N.V. 1999. All rights reserved.
PCD3316
POR(H)
CIDCW receiver
, the
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