NTE1208
Integrated Circuit
CMOS, Phase Comparator
Description:
The NTE1208 is an integrated circuit in a 9–Lead SIP type package consisting of a digital phase
comparator and an amplifier. Three state output connected to low pass filter (using an internal amplifi-
er) will produce DC voltage to control a VCO.
Low state pulses appear on phase out as long as the loop is unlocked and these can be utilized as
lock indicator.
Absolute Maximum Ratings:
(T
A
= +25°C unless otherwise speciied)
Supply Voltage, V
DD
10V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Voltage, V
IN
–0.3V to V
DD
+0.3V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, T
opr
–30° to +75°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
–55° to +125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics:
(T
A
= –35° to +75°C, V
DD
= 7.5V unless otherwise speciied)
Parameter Symbol Test Conditions Min Typ Max Unit
Operating Supply Voltage V
DD
4.5 – 8.0 V
Output Voltage, “H” Level V
OH
V
IL
= 1.6V, V
IH
= 6.6V, I
OH
= –50µA
7.3 – – V
Output Voltage, “L” Level V
OL
– – 0.2 V
Quiescent Current I
DD
V
IH
= 7.5V, V
IL
= 0V – – 200 µA
3 State Leakage Current I
TLH
– – 500 nA
I
TLL
– – –500 nA
Filter Amp Voltage Gain A
V
R
1–2
= 1MΩ, f
IN
= 1kHz, R
g
= 600Ω – 3.0 – dB
