The NTE7108 is an integrated circuit in an 18鈥揕ead DIP type package and when used in combination
with a VCO (tuner), comprises a digital programmable phase鈥搇ocked loop (PLL) for television devices
designed to use the PLL frequency synthesis tuning principle.
鈭?/div>
1300MHz in the
62.5kHz raster. By including an external prescaler 1/2, the component can also be used for synthesiz-
ing applications of up to 2.4GHz (e.g. satellite receivers). As a result, the resolution is doubled to
125kHz. The tuning process is controlled via an I
2
C bus by the microprocessor.
Features:
D
Low Current Consumption
D
Message Transmission Via I
2
C Bus
D
4 Software鈥揅ontrolled Outputs
D
Cost鈥揈ffective and Space鈥揝aving Design
D
Prescaler Output Frequency is Free from Interference Radiation
Absolute Maximum Ratings:
(Note 1)
Supply Voltage, V
S
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?.3V to 6V
Output PD, V
1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?.3V to V
S
Crystal Q1, V
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?.3V to V
S
Crystal Q2, V
3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?.3V to V
S
Bus Input/Output SDA, V
4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?.3V to V
S
Bus Input SCL, V
5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?.3V to V
S
Port Output P7, V
6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?.3V to +16V
Port Output P6, V
7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?.3V to +16V
Port Output P5, V
8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?.3V to +16V
Port Output P4, V
9
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?.3V to +16V
Port Output P3, V
10
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?.3V to +16V
Port Output P2, V
11
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?.3V to +16V
Port Output P1, V
12
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?.3V to +16V
Port Output P0, V
13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?.3V to +16V
Signal Input UHF/VHF, V
15
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?.3V to +2.5V
Reference Input REF, V
16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?.3V to +2.5V
Output Active Filter V
D
, V
18
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?.3V to V
S
Bus Output SDA (Open Collector), I
4L
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?mA to +5mA
Port Output P7 (Open Collector), I
6L
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?mA to +5mA
Note 1. Stresses above those listed under 鈥淎bsolute Maximum Ratings鈥?may cause permanent damage
to the device. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
1
2
3
4
