SP4740 Datasheet, PDF (2/6 Pages) Zarlink Semiconductor Inc – 1·3GHz 4256 PRESCALER WITH LOW CURRENT AND LOW RADIATION

3062-2.2
SP4740
1·3GHz 4256 PRESCALER WITH LOW CURRENT AND LOW RADIATION
The SP4740 4256 prescaler is one of GPS’ range of high
speed dividers for consumer frequency synthesis and
measurement systems. It has a low supply current, giving reduced
dissipation and operating temperatures in an 8-pin plastic DIL
(DP8) or miniature plastic DIL (MP8) package. Spurious radiation
has been reduced from all stages.
The SP4740 incorporates an on-chip preamplifier with
differential inputs and has a TTL/CMOS compatible output.
FEATURES
s Low Supply Current
s Low Radiation
s Input Wideband Amplifier
s High Input Sensitivity
s High Input Impedance
s TTL/CMOS Output
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

INPUT 

VCC
VCC
1
8
2
7
SP4740
3
6
4
5
0V
0V
OUTPUT
DP8

INPUT _

V_CC
VCC
1
8
2
7
SP4740
3
6
4
5
0V
0V
OUTPUT
MP8
Fig 1. Pin connections - top view
ORDERING IFORMATION
SP4740 NA DP
SP4740 NA MP
1
DIFFERENTIAL
INPUT



2
1k
2k
1k
2k
V_CC
3
4256
8
0V
Fig. 2 SP4740 block diagram
V_CC
4
600
5
OUTPUT
7
0V