NTE1786
Integrated Circuit
Frequency Lock Loop (FLL)
Tuning & Control Circuit
Description:
The NTE1786 is an integrated circuit in a 24Lead DIP type package that provides closedloop digital
tuning of TV receivers, with or without AFC, as required. This device also controls up to 4 analog func-
tions, 4 general purpose I/O ports and 4 highcurrent outputs for tuner band selection.
Features:
D
Combined Analog and Digital Circuitry Minimizes the Number of Additional Interfacing Components
Required
D
Frequency Measurement with Resolution of 50kHz
D
Selectable Prescaler Divisor of 64 or 256
D
32V Tuning Voltage Amplifier
D
4 HighCurrent Outputs for Direct Band Selection
D
4 Static DigitaltoAnalog Convertors (DACs) for Control of Analog Functions
D
4 General Purpose Input/Output (I/O) Ports
D
Tuning with Control of Speed and Direction
D
Tuning with or without AFC
D
SinglePin, 4MHz OnChip Oscillator
D
I
2
C Bus Slave Transceiver
Applications:
D
TV Receivers
D
Satellite Receivers
D
CATV Converters
Absolute Maximum Ratings:
Supply Voltage Ranges,
Pin13, V
CC1
0.3 to +18V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin19, V
CC2
0.3 to +18V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin14, V
CC3
0.3 to +36V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Absolute Maximum Ratings (Cont'd):
Input/Output Voltage Ranges,
Pin2, V
SDA
0.3 to +18V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin3, V
SCL
0.3 to +18V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin4 to Pin7, V
P2X
0.3 to +18V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin8 & Pin9 (Note 1), V
AFC+
, V
AFC
0.3 to V
CC1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin10, V
TI
0.3 to V
CC1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin12 (Note 2), V
TUN
0.3 to V
CC3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin15 to Pin18 (Note 2), V
P1X
0.3 to V
CC2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin20 (Note 1), V
FDIV
0.3 to V
CC1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin21, V
OSC
0.3 to +5V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin1, Pin22 to Pin24 (Note 1), V
DACX
0.3 to V
CC1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total Power Dissipation, P
TOT
1000mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Ambient Temperature Range, T
A
20
to +70
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
65
to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Note 1. Pin voltage may exceed supply voltage if current is limited to 10mA.
Note 2. Pin voltage must not exceed 18v but may exceed V
CC2
of current is limited to 200mA.
DC and AC Electrical Characteristics:
(T
A
= +25
C, V
CC1
, V
CC2
, V
CC3
at typical voltages
unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Supply Voltage
V
CC1
10.5
12.0
13.5
V
V
CC2
4.7
13.0
16.0
V
V
CC3
30
32
35
V
Supply Current (No Outputs Loaded)
I
CC1
18
30
45
mA
I
CC2
0
0.1
mA
I
CC3
0.2
0.6
2.0
mA
Additional Supply Currents (A)
I
CC2A
Note 3
2
I
OHP1X
mA
I
CC3A
Note 3
0.2
2.0
mA
Total Power Dissipation
P
TOT
380
mW
Operating Ambient Temperature
T
A
20
+70
C
I
2
C Bus Inuts SDA Input (Pin2); SCL Input (Pin3)
Input Voltage, HIGH
V
IH
Note 4
3
V
CC
1
V
Input Voltage, LOW
V
IL
0.3
1.5
V
Input Current, HIGH
I
IH
Note 4
10
A
Input Current, LOW
I
IL
10
A
I
2
C Bus Outputs SDA Output (Pin2, Open Collector)
Output Voltage, LOW
V
OL
I
OL
= 3mA
0.4
V
Maximum Output Sink Current
I
OL
5
mA
OpenCollector I/O Ports P20, P21, P22, P23 (Pin4 to Pin7, Open Collector)
Input Voltage, HIGH
V
IH
2
16
V
Input Voltage, LOW
V
IL
0.3
0.8
V
Input Current, HIGH
I
IH
25
A
Input Current, LOW
I
IL
25
A
Output Voltage, LOW
V
OL
I
OL
= 2mA
0.4
V
Maximum Output Sink Current
I
OL
4
mA
Note 3. For each bandselect output which is programmed at logic 1, sourcing a current I
OOP1X
, the
additional supply currents (A) shown must be added to I
CC2
and I
CC3
, respectively.
Note 4. If V
CC1
< 1V, the input current is limited to 10
A at input voltages up to 16V.
DC and AC Electrical Characteristics (Cont'd): (T
A
= +25
C, V
CC1
, V
CC2
, V
CC3
at typical voltages
unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
AFC Amplifier Inputs AFC+, AFC (Pin8, Pin9)
Transconductance for Input Voltages
g00
AFCS1: 0, AFCS2: 0
100
250
800
nA/V
up to 1V Differential
g01
AFCS1: 0, AFCS2: 1
15
25
35
A/V
g10
AFCS1: 1, AFCS2: 0
30
50
70
A/V
g11
AFCS1: 1, AFCS2: 1
60
100
140
A/V
Tolerance of Transconductance
Multiplying Factor (2, 4, or 8)
when CorrectioninBand is
Used
M
g
20
+20
%
Input Offset Voltage
V
IOFF
75
+75
mV
CommonMode Input Voltage
V
COM
3
V
CC1
2.5
V
CommonMode Rejection Ratio
CMRR
50
dB
Power Supply (V
CC1
) Rejection Ratio
PSRR
50
dB
Input Current
I
I
500
nA
Tuning Voltage Amplifier Input TI, Output TUN (Pin10, Pin12)
Maximum Output Voltage
V
TUN
I
LOAD
=
2.5mA
V
CC3
1.6
V
CC3
0.4
V
Maximum Output Voltage
V
TM00
I
LOAD
=
2.5mA, VTMI1: 0,
VTMI0: 0
300
500
mV
V
TM10
I
LOAD
=
2.5mA, VTMI1: 1,
VTMI0: 0
450
650
mV
V
TM11
I
LOAD
=
2.5mA, VTMI1: 1,
VTMI0: 1
650
900
mV
Maximum Output Source Current
I
TUNH
2.5
8.0
mA
Maximum Output Sink Current
I
TUNL
40
mA
Input Bias Current
I
TI
5
+5
nA
Power Supply (V
CC3
) Rejection Ratio
PSRR
60
dB
Minimum Charge IT to Tuning
CH
00
TUHN1: 0, TUHN0: 0
0.4
1.0
1.7
A/V
Voltage Amplifier
CH
01
TUHN1: 0, TUHN0: 1
4
8
14
A/V
CH
10
TUHN1: 1, TUHN0: 0
15
30
48
A/V
CH
11
TUHN1: 1, TUHN0: 1
130
250
370
A/V
Tolerance of Charge (or
V
TUN
)
Multiplying Factor when COIB
and/or TUS are Used
CH
20
+20
%
Maximum Current I into Tuning
I
T00
TUHN1: 0, TUHN0: 0
1.7
3.5
5.1
A
Amplifier
I
T01
TUHN1: 0, TUHN0: 1
15
29
41
A
I
T10
TUHN1: 1, TUHN0: 0
65
110
160
A
I
T11
TUHN1: 1, TUHN0: 1
530
875
1220
A
CorrectioninBand
Tolerance of CorrectioninBand
Levels 12V, 18V, and 24V
V
CIB
15
+15
%
BandSelect Output Ports P10, P11, P12, P13 (Pin15 to Pin18)
Output Voltge, HIGH
V
OH
I
OH
= 50mA, Note 5
V
CC2
0.6
V
Output Voltage, LOW
V
OL
I
OL
= 2mA
0.4
V
Note 5. At continuous operation the output current should not exceed 50mA. When the output is
shortcircuited to GND for several seconds the device may be damaged.
DC and AC Electrical Characteristics (Cont'd): (T
A
= +25
C, V
CC1
, V
CC2
, V
CC3
at typical voltages
unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
BandSelect Output Ports (Cont'd) P10, P11, P12, P13 (Pin15 to Pin18)
Maximum Output Source Current
I
OH
Note 5
130
200
mA
Maximum Output Sink Current
I
OL
5
mA
FDIV Input (Pin20)
Input Voltage (PeaktoPeak Value)
V
FDIV
PP)
t
RISE
and t
FALL
40ns
0.1
2.0
V
Duty Cycle
40
60
%
Maximum Input Frequency
f
MAX
14.5
MHz
Input Impedance
Z
i
8
k
Input Capacitance
C
I
5
pF
OSC Input (Pin21)
Crystal Resistance at Resonance
(4MHz)
R
X
150
DAC Outputs (Pin1, Pin22 to Pin24)
Maximum Output Voltage (No Load)
V
DH
V
CC1
= 12V, Note 6
10.0
11.5
V
Minimum Output Voltage (No Load)
V
DL
V
CC1
= 12V, Note 6
0.1
1.0
V
Positive Value of Smallest Step
V
D
1 Least Significant Bit
0
350
mV
Deviation from Linearity
0.5
V
Output Impedance
Z
D
I
LOAD
=
2mA
70
Maximum Output Source Current
I
DH
6
mA
Maximum Output Sink Current
I
DL
8
mA
PowerDown Reset
Maximum Supply Voltage (V
CC1
) at
which PowerDown Reset is
Active
V
PD
7.5
9.5
V
V
CC1
Rise Time During PowerUp
(Up to V
PD
)
t
R
5
s
Voltage Level for Valid Module Address
Voltage Level at P20 (Pin4) for Valid
V
VA00
MA1: 0, MA0: 0
0.3
16
V
Module Address as a Function of
MA1, MA0
V
VA01
MA1: 0, MA0: 1
0.3
0.8
V
MA1, MA0
V
VA10
MA1: 1, MA0: 0
2.5
V
CC1
2
V
V
VA11
MA1: 1, MA0: 1
V
CC1
0.3
V
CC1
V
Note 5. At continuous operation the output current should not exceed 50mA. When the output is
shortcircuited to GND for several seconds the device may be damaged.
Note 6. Values are proportional to V
CC1
.
Pin Connection Diagram
V
CC
1 (12V Typ)
V
CC
3 (32V Typ)
V
CC
2 (13V Typ)
Tuning Voltage Amp
P12
Prescaler Input
P10
P11
P13
X'tal OSC Input
DAC0 Output
DAC2 Output
P20
1
2
3
4
DAC3 Output
Serial Data Line
Serial Clock Line
5
P21
6
P22
7
P23
8
AFC (+) Input
24
23
22
21
20
19
18
17
9
AFC () Input
16
10
Tuning Voltage Amp
11
GND
15
14
12
13
DAC1 Output
I/O Ports
Invert Input
Output
Band Select
Output Ports
1
12
24
13
1.300 (33.02)
Max
.520
(13.2)
.600
(15.24)
1.100 (27.94)
.255
(5.73)
Max
.126
(3.22)
Min
.100 (2.54)
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