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SP8855E Datasheet(PDF) 1 Page - Zarlink Semiconductor Inc

Part # SP8855E
Description  2.8GHz Parallel Load Professional Synthesiser
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Manufacturer  ZARLINK [Zarlink Semiconductor Inc]
Direct Link  http://www.zarlink.com
Logo ZARLINK - Zarlink Semiconductor Inc

SP8855E Datasheet(HTML) 1 Page - Zarlink Semiconductor Inc

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SP8855E
2.8GHz Parallel Load Professional Synthesiser
Advance Information
DS4239
ISSUE 3.0
March 1999
HP44
Figure 1 - Pin connections - top view
Pin
Description
Pin
Description
1
Input bus bit 10
23
Control Direction
2
Input bus bit 9
24
F
pd*
3
Input bus bit 8
25
F
ref*
4
Input bus bit 7
26
+5V
5
Input bus bit 6
27
Ref. osc capacitor
6
Input bus bit 5
28
Ref in/XTAL
7
Input bus bit 4
29
Reference bit 9
8
Input bus bit 3
30
Reference bit 8
9
Input bus bit 2
31
Reference bit 7
10
Input bus bit 1
32
Reference bit 6
11
Input bus bit 0
33
Reference bit 5
12
0V (prescaler)
34
Reference bit 4
13
RF input
35
Reference bit 3
14
RF input
36
Reference bit 2
15
V
CC + 5V (prescaler)
37
Reference bit 1
16
V
EE 0V
38
Reference bit 0
17
Lock detect output
39
Phase Detect Enable
18
C-lock detect
40
Phase Detect Gain 1
19
Rset
41
Phase Detect Gain 0
20
Charge pump output
42
Input bus bit 13
21
Charge pump ref.
43
Input bus bit 12
22
F
ref/Fpd enable
44
Input bus bit 11
*Fpd and Fref outputs are reversed using the Control Direction
input. The table above is correct when pin 23 is high.
OPTIONAL
PIN 1
REFERENCE
HC44
PIN 1
Features
2.8GHz Operating Frequency (IG GRADE)
Single 5V Supply Operation
High Comparison Frequency 50MHz
High Gain Phase Detector 1mA/rad
Programmable Phase Detector Gain
Zero "Dead Band" Phase Detector
Wide range of RF and Reference Divide Ratios
Programming by Hard Wired Inputs
Low cost plastic package option
GPS HI-REL level a screened option
The SP8855E is one of a family of parallel load
synthesisers containing all the elements apart from the loop
amplifier to fabricate a PLL synthesis loop. Other devices in
the series are the SP8852E which is a fully programmable
device requiring two 16 bit words to set the RF and reference
counters, and the SP8854E which has hard wired reference
counter programming and requires a single bit word to pro-
gram the RF divider. The SP8855E replaces the existing
SP8855D.
The SP8855E is intended for applications where a fixed
synthesiser frequency is required although it can also be used
where frequency selection is set by switches. In general the
device will be programmed by connecting the programming
pins to either V
CC or ground. Additional hard wired inputs can
be used to control the F
pd and Fref outputs set the control
direction of the loop and select the phase detector gain.
Another input may be used to disable the phase detector
output.
The device is available in both plastic (HP) and ceramic
(HC) J-leaded 44-lead chip carrier. Ambient temperature
ranges available are shown in the ordering information.
Absolute Maximum Ratings
Supply voltage
-0.3V to 6V
Storage temperature
-65
°C to +150°C
Operating temperature
-55
°C to +100°C
Prescaler & reference Input Voltage
2.5V p-p
Data Inputs
V
CC +0.3V
V
EE -0.3V
Junction temperature
+ 175
°C (HC package)
+ 150
°C (HP package)


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