SP4666 Datasheet, PDF (2/5 Pages) Zarlink Semiconductor Inc – Prescaler with low current and low radiation

SP4666
Prescaler with low current and low radiation
DS2219 - 2.4
The SP4666 is a selectable division ratio high speed divider
capable of replacing separate fixed ratio ECL prescalers with a
single part in applications with alternative 464 and 4256 division
requirements.
A switched low pass filter with 23dB points at 5·3MHz and
15·6MHz is connected before the output stage to reduce the
harmonic content to a very low level.
FEATURES
s Switched Low Pass Filter for Very Low Output Radiation
s Low Supply Current
s Input Wideband Amplifier
s High Input Sensitivity
s High Input Impedance
s Balanced ECL Outputs
s Electrostatic Protection †
† ESD precautions must be observed
ABSOLUTE MAXIMUM RATINGS
Supply voltage, V_CC
Input voltage
Storage temperature
Operating temperature range
17V
2·5V p-p
255°C to 1150°C
0°C to180°C
1k
2k
1k
2k
NC
INPUT
INPUT
0V
1
8
2
7
SP4666
3
6
4
5
15V
OUTPUT
OUTPUT
464 /4256 SELECT
DP8
NC
INPUT
INPUT
0V
1
8
2
7
SP4666
3
6
4
5
15V
OUTPUT
OUTPUT
464 /4256 SELECT _MP8
Fig 1. Pin connections - top view
ORDERING INFORMATION
SP4666 NA DP
SP4666 NA MP
500
500
8 _VCC
7
OUTPUTS
6
2

INPUTS 

3
464/4256 SELECT ⁵
464/4256
V_CC
FILTER
10k
20k
50µA
Fig. 2 SP4666 block diagram
2mA
4
0V