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QEM77-AH Datasheet

  • QEM77-AH

  • Analog IC

  • 108.05KB

  • 7頁

  • ETC

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QEM77-AH
41 x 41 mm / 19 pins
QEM77AH
04-05-2001
TEMEX
TIME &
FREQUENCY
MCXO
Operating Procedure
5 MHz to 10 MHz
Frequency Range :
Applications :
Description :
Synchronization System
Test equipment
Military Radio
Low Power Equipment
The MCXO offers the parameters of OCXO's and TCXO's, delivering practically the frequency of an ovenized oscillator with
the power consumption associated with temperature compensated oscillators over the entire military range of -55擄C to +125擄C.
Using digital techniques, it is possible to operate a stand-by mode with low power consumption and to synchronize the 1 Hz
signal with an external source. In addition, a choice of output frequency is available.
Control of Secondary functions :
The secondary functions of the MCXO are obtained by two methods :
鈥?/div>
application of logic levels on the pin-out as indicated
鈥?/div>
inputting bytes on the RS232 port.
The details of the logic controls are shown on the following pages.
Block-Diagram :
Vcc
Gnd
CTRL
supply voltage
stabilisation
digital direct
synthesis
FMCXO
1, 5 or 10 MHz
dual-mode
oscillator
PLL
F3
F0
PC7
RESET
IRQ
FDDSI
VPP6
PD4
/3
N2
FM1 (1 Hz output)
1 Hz synch.
FM2 (1 Hz input)
delta
F尾
n
PD5
(synch enable)
Counter
N1
Microcontroller
RS 232 out
RS 232 in
PD1
PD2
PD6
PD7
n
F尾 /2
A /D converter
/2
SALES OFFICES:
Benelux:
+33 (0) 1 46 90 23 00 /
Germany:
+49 (0)
89 820 796-27
/
Nordic:
+46 (0) 8 59030300
France:
+33 (0) 1 46 90 23 00 /
Italy:
+39 (0) 738 8869 /
Spain:
+33 (0) 1 46 90 23 00 /
UK:
+44 (0) 1256 883340
USA:
+1 (623) 780-1995 /
Asia-Pacific
: +33 (0) 5 56 46 66 84
WEB SITE: http://www.temex-components.com
Specifications are subject to change without notice - Page 1 / 7

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