NJ88C50 Ver la hoja de datos (PDF) - Mitel Networks
Número de pieza
componentes Descripción
Fabricante
NJ88C50 Datasheet PDF : 15 Pages
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NJ88C50
Notes
1. Source impedance = 50Ω
2. Virtual earth input amplifier, therfore low impedance for small signals. Impedance is high once signal amplitude exceeds
typically ±0.125V.
3. Input amplifier may become unstable for higher values of Z .
S
DYNAMIC
AC Characteristics
Vdd = 5V ± 10%, Tamb = -40 to +85°C
Input signals - Logic and current defining pins
Parameter
Min
Typ
Max
Data and strobe
Input voltage high
Input voltage low
Input capacitance
Input current
Vdd-0.8
Vdd
0
0.8
10
10
Clock
Input voltage high
Input voltage low
Input capacitance
Input current
Input frequency
Vdd-0.8
Vdd
0
0.8
10
10
10
Current setting pins
Input Signal RSA
80
Input current
Input Signal RSM
32
Input current
Input Signal RSC
12.8
Input current
Unit
V
V
pF
µA
V
V
pF
µA
MHz
µA
µA
µA
Condition
Notes 1, 4
Notes 2, 4
Notes 3, 4
Notes
1. The current set on pin RSA will be scaled up on chip by a factor of 3 to give the value of the auxiliary phase detector
output.
2. The current set on pin RSM will be scaled down on chip by a factor of 32 to provide the current Ibo to the main phase
detector which gives the outputs Iprop and Iint.
3. The current set on pin RSC will be scaled down on chip by a factor of 128 to provide the current Ico to the main phase
detector which gives the outputs Icomp and Icomp 2.
4. The voltage on each of the three current setting pins (RSA, RSM, RSC) is approximately 4V.
Therefore to give a typical current of 32µA on RSM for example, a 125kΩ resistor connected between the pin and GND
would be required.
10
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