HC55171CB Intersil Corporation, HC55171CB Datasheet
HC55171CB
Related parts for HC55171CB
HC55171CB Summary of contents
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... Ordering Information TEMP. RANGE o PART NUMBER ( C) PACKAGE HC55171IM - PLCC HC55171CM PLCC HC55171IB - SOIC HC55171CB SOIC Block Diagram TIP FEED TIP SENSE RING FEED RING SENSE 1 RING SENSE 2 V REF RTI V BAT V CC BIAS ...
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... CC BAT Relay Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to +15V Operating Conditions Temperature Range HC55171IM, HC55171IB . . . . . . . . . . . . . . . . . . . . -40 HC55171CM, HC55171CB . . . . . . . . . . . . . . . . . . . . 0 Relay Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5V to +12V Positive Power Supply + Negative Power Supply .-16V to -80V BAT CAUTION: Stresses above those listed in “ ...
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Electrical Specifications Unless Otherwise Specified, Typical Parameters are at T Operating Temperature Range 600 2-Wire terminating impedance. PARAMETER Level Linearity Absolute Delay, 2W-4W Absolute Delay, 4W-2W Absolute Delay, 4W-4W Transhybrid Loss Total Harmonic Distortion 2-Wire/4-Wire, 4-Wire/2-Wire, 4-Wire/4-Wire Idle ...
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Electrical Specifications Unless Otherwise Specified, Typical Parameters are at T Operating Temperature Range 600 2-Wire terminating impedance. PARAMETER UNCOMMITTED RELAY DRIVER On Voltage Off Leakage Current TTL/CMOS LOGIC INPUTS (F0, F1, RS, TST, RDI) Logic Low ...
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Functional Diagram TIP SENSE R 4.5K 100K 100K 15 RING SENSE 1 100K 100K 16 RING SENSE 2 4.5K 90K 90K 108k HC55171 ...
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Circuit Operation and Design Information Introduction The HC55171 is a high voltage Subscriber Line Interface Cir- cuit (SLIC) specifically designed for through SLIC ringing applications. Through SLIC ringing applications are broadly defined as any application that requires ringing capability but ...
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SLIC TIP V RX OUT1 RING FIGURE 3. COMPLETE VOICE SIGNAL PATH Impedance Matching Impedance matching is used to match the AC source imped- ance of the SLIC to the AC source impedance of the load. When the impedance is ...
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DC Operation of Tip and Ring Amplifiers SLIC in the Active Mode The tip and ring amplifiers are voltage feedback op amps that are connected to generate a differential output (e.g., if tip sources 20mA then ring sinks 20mA). Figure ...
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AC Voltage Gain Design Equations The HC55171 uses feedback to synthesize the impedance at the 2-wire tip and ring terminals. This feedback network defines the AC voltage gains for the SLIC. The 4-wire to 2-wire voltage gain (V RX feedback ...
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Impedance Matching Design Equations Matching the impedance of the SLIC to the load is accomplished by writing a loop equation starting at V going around the ...
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GROUND BATTERY (A) SINUSOID GROUND BATTERY (B) TRAPEZOID FIGURE 9. BALANCED RINGING WAVESHAPES HC55171 ringing SLIC meets the REN drive requirement, the crest factor limitations and the minimum RMS ringing voltage. The foremost requirement is that the ringing source must ...
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SLIC. A single resistor sets the open circuit RMS ringing voltage, which will set the crest factor of the ringing waveform. The crest factor of the HC55171 ...
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LOOP IMPEDANCE FIGURE 11. RMS RINGING VOLTAGE vs LOOP LENGTH REN = 100 200 300 LOOP IMPEDANCE FIGURE 12. RMS RINGING VOLTAGE vs LOOP ...
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Loop Detector Interface The RTD output should be monitored for off hook detection during the ringing period. At all other times, the SHD should be monitored for off hook detection. The application circuit can be modified to redirect the ring ...
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Polarity Reversal The HC55171 supports applications that use polarity reversal outside the speech phase of a call connection. The most com- mon implementation of this type of polarity reversal is used with pay phones. By reversing the polarity of the ...
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Pin Descriptions PLCC SYMBOL 1 AGND Analog Ground - Serves as a reference for the transmit output and receive input terminals Positive Voltage Source - Most Positive Supply external voltage connected to this pin ...
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Pinouts HC55171 (PLCC) TOP VIEW SHD 7 RTD 8 TST 9 ALM 10 ILMT Trapezoidal Ringing Application Circuit TIP RING BAT F1 ...
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... All Intersil semiconductor products are manufactured, assembled and tested under ISO9000 quality systems certification. Intersil semiconductor products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time with- out notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use ...