NTE NTE1786

NTE1786
Integrated Circuit
Frequency Lock Loop (FLL)
Tuning & Control Circuit
Description:
The NTE1786 is an integrated circuit in a 24–Lead DIP type package that provides closed–loop digital
tuning of TV receivers, with or without AFC, as required. This device also controls up to 4 analog functions, 4 general purpose I/O ports and 4 high–current 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 High–Current Outputs for Direct Band Selection
D 4 Static Digital–to–Analog 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 Single–Pin, 4MHz On–Chip Oscillator
D I2C Bus Slave Transceiver
Applications:
D TV Receivers
D Satellite Receivers
D CATV Converters
Absolute Maximum Ratings:
Supply Voltage Ranges,
Pin13, VCC1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to +18V
Pin19, VCC2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to +18V
Pin14, VCC3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to +36V
Absolute Maximum Ratings (Cont’d):
Input/Output Voltage Ranges,
Pin2, VSDA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to +18V
Pin3, VSCL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to +18V
Pin4 to Pin7, VP2X . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to +18V
Pin8 & Pin9 (Note 1), VAFC+, VAFC– . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to VCC1
Pin10, VTI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to VCC1
Pin12 (Note 2), VTUN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to VCC3
Pin15 to Pin18 (Note 2), VP1X . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to VCC2
Pin20 (Note 1), VFDIV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to VCC1
Pin21, VOSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to +5V
Pin1, Pin22 to Pin24 (Note 1), VDACX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to VCC1
Total Power Dissipation, PTOT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000mW
Operating Ambient Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +70°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –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 VCC2 of current is limited to 200mA.
DC and AC Electrical Characteristics:
Parameter
Supply Voltage
Supply Current (No Outputs Loaded)
Additional Supply Currents (A)
Total Power Dissipation
Operating Ambient Temperature
I2C
Symbol
Min
Typ
Max
Unit
VCC1
10.5
12.0
13.5
V
VCC2
4.7
13.0
16.0
V
VCC3
30
32
35
V
ICC1
18
30
45
mA
ICC2
0
–
0.1
mA
ICC3
0.2
0.6
2.0
mA
Test Conditions
ICC2A
Note 3
–2
–
IOHP1X
mA
ICC3A
Note 3
0.2
–
2.0
mA
PTOT
–
380
–
mW
TA
–20
–
+70
°C
3
–
VCC–1
V
–0.3
–
1.5
V
–
–
10
µA
–
–
10
µA
–
–
0.4
V
–
5
–
mA
Bus Inuts SDA Input (Pin2); SCL Input (Pin3)
Input Voltage, HIGH
VIH
Input Voltage, LOW
VIL
Input Current, HIGH
IIH
Input Current, LOW
IIL
I2C
(TA = +25°C, VCC1, VCC2, VCC3 at typical voltages
unless otherwise specified)
Note 4
Note 4
Bus Outputs SDA Output (Pin2, Open Collector)
Output Voltage, LOW
VOL
Maximum Output Sink Current
IOL
IOL = 3mA
Open–Collector I/O Ports P20, P21, P22, P23 (Pin4 to Pin7, Open Collector)
Input Voltage, HIGH
VIH
2
–
16
V
Input Voltage, LOW
VIL
–0.3
–
0.8
V
Input Current, HIGH
IIH
–
–
25
µA
Input Current, LOW
IIL
–
–
25
µA
–
–
0.4
V
–
4
–
mA
Output Voltage, LOW
VOL
Maximum Output Sink Current
IOL
IOL = 2mA
Note 3. For each band–select output which is programmed at logic 1, sourcing a current IOOP1X, the
additional supply currents (A) shown must be added to ICC2 and ICC3, respectively.
Note 4. If VCC1 < 1V, the input current is limited to 10µA at input voltages up to 16V.
DC and AC Electrical Characteristics (Cont’d): (TA = +25°C, VCC1, VCC2, VCC3 at typical voltages
unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
g00
AFCS1: 0, AFCS2: 0
100
250
800
nA/V
g01
AFCS1: 0, AFCS2: 1
15
25
35
µA/V
g10
AFCS1: 1, AFCS2: 0
30
50
70
µA/V
g11
AFCS1: 1, AFCS2: 1
60
100
140
µA/V
AFC Amplifier Inputs AFC+, AFC– (Pin8, Pin9)
Transconductance for Input Voltages
up to 1V Differential
Tolerance of Transconductance
Multiplying Factor (2, 4, or 8)
when Correction–in–Band is
Used
∆Mg
–20
–
+20
%
Input Offset Voltage
VIOFF
–75
–
+75
mV
Common–Mode Input Voltage
VCOM
3
–
VCC1–2.5
V
Common–Mode Rejection Ratio
CMRR
–
50
–
dB
Power Supply (VCC1) Rejection Ratio
PSRR
–
50
–
dB
II
–
–
500
nA
VCC3–1.6
–
VCC3–0.4
V
Input Current
Tuning Voltage Amplifier Input TI, Output TUN (Pin10, Pin12)
Maximum Output Voltage
VTUN
ILOAD = ±2.5mA
Maximum Output Voltage
VTM00
ILOAD = ±2.5mA, VTMI1: 0,
VTMI0: 0
300
–
500
mV
VTM10
ILOAD = ±2.5mA, VTMI1: 1,
VTMI0: 0
450
–
650
mV
VTM11
ILOAD = ±2.5mA, VTMI1: 1,
VTMI0: 1
650
–
900
mV
–ITUNH
2.5
–
8.0
mA
ITUNL
–
40
–
mA
ITI
–5
–
+5
nA
Power Supply (VCC3) Rejection Ratio
PSRR
–
60
–
dB
Minimum Charge IT to Tuning
Voltage Amplifier
CH00
TUHN1: 0, TUHN0: 0
0.4
1.0
1.7
µA/V
CH01
TUHN1: 0, TUHN0: 1
4
8
14
µA/V
CH10
TUHN1: 1, TUHN0: 0
15
30
48
µA/V
CH11
TUHN1: 1, TUHN0: 1
130
250
370
µA/V
–20
–
+20
%
Maximum Output Source Current
Maximum Output Sink Current
Input Bias Current
Tolerance of Charge (or ∆VTUN)
Multiplying Factor when COIB
and/or TUS are Used
∆CH
Maximum Current I into Tuning
Amplifier
IT00
TUHN1: 0, TUHN0: 0
1.7
3.5
5.1
µA
IT01
TUHN1: 0, TUHN0: 1
15
29
41
µA
IT10
TUHN1: 1, TUHN0: 0
65
110
160
µA
IT11
TUHN1: 1, TUHN0: 1
530
875
1220
µA
–15
–
+15
%
VCC2–0.6
–
–
V
–
–
0.4
V
Correction–in–Band
Tolerance of Correction–in–Band
Levels 12V, 18V, and 24V
∆VCIB
Band–Select Output Ports P10, P11, P12, P13 (Pin15 to Pin18)
Output Voltge, HIGH
VOH
–IOH = 50mA, Note 5
Output Voltage, LOW
VOL
IOL = 2mA
Note 5. At continuous operation the output current should not exceed 50mA. When the output is
short–circuited to GND for several seconds the device may be damaged.
DC and AC Electrical Characteristics (Cont’d): (TA = +25°C, VCC1, VCC2, VCC3 at typical voltages
unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
–
130
200
mA
–
5
–
mA
0.1
–
2.0
V
40
–
60
%
fMAX
14.5
–
–
MHz
Input Impedance
Zi
–
8
–
kΩ
Input Capacitance
CI
–
5
–
pF
RX
–
–
150
Ω
Band–Select Output Ports (Cont’d) P10, P11, P12, P13 (Pin15 to Pin18)
Maximum Output Source Current
–IOH
Maximum Output Sink Current
Note 5
IOL
FDIV Input (Pin20)
Input Voltage (Peak–to–Peak Value)
VFDIVP–P) tRISE and tFALL ≤ 40ns
Duty Cycle
Maximum Input Frequency
OSC Input (Pin21)
Crystal Resistance at Resonance
(4MHz)
DAC Outputs (Pin1, Pin22 to Pin24)
Maximum Output Voltage (No Load)
VDH
VCC1 = 12V, Note 6
10.0
–
11.5
V
Minimum Output Voltage (No Load)
VDL
VCC1 = 12V, Note 6
0.1
–
1.0
V
Positive Value of Smallest Step
∆VD
1 Least Significant Bit
0
–
350
mV
–
–
0.5
V
–
–
70
Ω
–IDH
–
–
6
mA
IDL
–
8
–
mA
Maximum Supply Voltage (VCC1) at
which Power–Down Reset is
Active
VPD
7.5
–
9.5
V
VCC1 Rise Time During Power–Up
(Up to VPD)
tR
5
–
–
µs
Deviation from Linearity
Output Impedance
Maximum Output Source Current
ZD
Maximum Output Sink Current
ILOAD = ±2mA
Power–Down Reset
Voltage Level for Valid Module Address
Voltage Level at P20 (Pin4) for Valid
Module Address as a Function of
MA1, MA0
VVA00
MA1: 0, MA0: 0
–0.3
–
16
V
VVA01
MA1: 0, MA0: 1
–0.3
–
0.8
V
VVA10
MA1: 1, MA0: 0
2.5
–
VCC1–2
V
VVA11
MA1: 1, MA0: 1
VCC1–0.3
–
VCC1
V
Note 5. At continuous operation the output current should not exceed 50mA. When the output is
short–circuited to GND for several seconds the device may be damaged.
Note 6. Values are proportional to VCC1.
Pin Connection Diagram
DAC3 Output 1
Serial Data Line 2
Serial Clock Line 3
P20 4
P21 5
I/O Ports
P22 6
P23 7
AFC (+) Input 8
AFC (–) Input 9
Tuning Voltage Amp 10
Invert Input
GND 11
Tuning Voltage Amp 12
Output
24
23
22
21
20
19
18
17
16
15
14
13
24
13
1
12
DAC2 Output
DAC1 Output
DAC0 Output
X’tal OSC Input
Prescaler Input
VCC 2 (13V Typ)
P13
P12 Band Select
P11 Output Ports
P10
VCC 3 (32V Typ)
VCC 1 (12V Typ)
1.300 (33.02)
Max
.520
(13.2)
.255
(5.73)
Max
.100 (2.54)
1.100 (27.94)
.126
(3.22)
Min
.600
(15.24)