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MC44871

Features: • The Pin Called VCC2 for the MC44818 is Now Called CP (Charge Pump). This Pin is the Output of the DC/DC Converter; a 1.0 nF Capacitor Replaces the Need for an External 30 V Supply• High Speed I2C Bus (up to 800 kHz)• I2C Bus Read Mode for Lock Detector and AFC Level&#...

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SeekIC No. : 004416015 Detail

MC44871: Features: • The Pin Called VCC2 for the MC44818 is Now Called CP (Charge Pump). This Pin is the Output of the DC/DC Converter; a 1.0 nF Capacitor Replaces the Need for an External 30 V Supply&...

MC44871 Data Sheet

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Part Number:
MC44871
Supply Ability:
5000

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  • 1~5000
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Product Details

Description



Features:

• The Pin Called VCC2 for the MC44818 is Now Called CP (Charge Pump). This Pin is the Output of the 
    DC/DC Converter; a 1.0 nF Capacitor Replaces the Need for an External 30 V Supply
• High Speed I2C Bus (up to 800 kHz)
• I2C Bus Read Mode for Lock Detector and AFC Level
• HF Input is Balanced
• MC44871 has Three PNP High Current (30 mA) Band Buffers (B0, B1, B2) and One NPN Low Current (5.0 mA) 
    Band Buffer (B4)
• VCC Internally Supplies PNP Band Buffers
• The Tuning Voltage is Generated Through an External PullUp Resistor (750 k)
• Less Phase Comparator Output Current
• Single 5.0 V Supply Operation


Pinout

Connection Diagram


Specifications

Rating
Pin
Value
Unit
Power Supply Voltage (VCC)
11
6.0
V
Storage Temperature
-
65 to +150
Operating Temperature Range
-
20 to +85
Operational Amplifier Output Voltage
1
40
V
RF Input Level 80 MHz to 1.3 GHz
3, 4
1.5
Vrms
NPN Band Buffer "Off" Voltage
9
10
V
NPN Band Buffer "On" Current
9
15
mA
PNP Band Buffer "Off" Voltage
6, 7, 8
6.0
V
PNP Band Buffer "On" Current
6, 7, 8
50
mA
PNP Band Buffer Short Circuit Duration (Note 1)
6, 7, 8
Continuous
-
Band Buffer Operation at 40 mA
all PNP Buffers "On"
6, 7, 8
10
s
NOTES: 1. At VCC = 5.0 V and TA = 20° to +80  one buffer "On" only.
             2. ESD data available upon request.


Description

The MC44871 is a tuning circuit for TV, VCR and Multimedia tuner applications. This device contains on one chip all the functions required for PLL control of a VCO. The MC44871 also contains a high frequency prescaler and thus can handle frequencies up to 1.3 GHz.

The MC44871 has an integrated dc/dc converter to generate the 30 V supply voltage for the tuning amplifier on the chip. A tuner using the MC44871 does not require an external 30 V supply.

The MC44871 is controlled by a I2C bus, and has a chip address function. Its data format is the same as the MC44818.

The MC44871 is manufactured on a single silicon chip using Motorola's high density bipolar process, MOSAICETM(Motorola Oxide Self Aligned Implanted Circuits).




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