NTE974
Integrated Circuit
Phase鈥揊requency Detector
Description:
The NTE974 consists of two digital phase detectors, a charge pump, and an amplifier. In combination
with a voltage controlled multivibrator, it is useful in a broad range of phase鈥搇ocked loop applications.
The circuit accepts MTTL waveforms at the R and V inputs and generates an error voltage that is pro-
portional to the frequency and/or phase difference of the input signals. Phase detector #1 is intended
for use in systems requiring zero frequency and phase difference at lock. Phase detector #2 is used
if quadrature lock is desired. Phase detector #2 can also be used to indicate that the main loop, utiliz-
ing phase detector #1, is out of lock.
Absolute Maximum Ratings:
Supply Operating Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.75 to 5.25V
Supply Voltage, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +7.0V
Input Voltage, V
I
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5.5V
Output Voltage, V
O
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5.5V
Operating Temperature Range, T
opr
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0擄 to +75擄C
Storage Temperature Range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?5擄 to +125擄C
Maximum Junction Temperature, T
J
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150擄C
Thermal Resistance, Junction鈥搕o鈥揅ase, R
thJC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.07擄C/mW
Thermal Resistance, Junction鈥搕o鈥揂mbient, R
thJA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.15擄C/mW
Electrical Characteristics:
(T
A
= +25擄C unless otherwise spcified)
Parameter
Input
Forward Current
I
IL
I
IH
1, 3
11
Leakage Current
1, 3
4
11
I
IHH
Clamp Voltage
V
IC
V
IH
= 5.5V, V
CCH
= 5.25V
V
CCH
= 5.25V
V
IH
= 5.5V, V
CCH
= 5.25V
I
IC
= 鈥?0 mA, V
CCL
= 4.75V
V
IL
= 0.4V, V
CCH
= 5.25V
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
1.0
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?.8
鈥?.6
120
5.0
40
鈥?/div>
鈥?.5
mA
mA
碌A(chǔ)
碌A(chǔ)
碌A(chǔ)
mA
V
Symbol
Pin
Test Conditions
Min
Typ
Max
Unit
1, 3, 11 V
IHH
= 5.5V, V
CCH
= 5.25V
1, 3
Note 1. The outputs of the device must be tested by sequencing through the indicated input states
according to the truth table. All input, power supply, and ground voltages must be maintained
between tests unless otherwise noted.
Note 2. Input Loading Factor: R, V = 3
Output Loading Factor (Pin8) = 10
Total Power Dissipation = 85mW Typ/Pkg
Propagation Delay Time = 9ns Typ (thru phase detector)
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