ATTL7554AP Agere Systems, ATTL7554AP Datasheet
ATTL7554AP
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ATTL7554AP Summary of contents
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March 1997 Features Low active power (typical 165 mW during on-hook transmission) Sleep state for low idle power (76 mW) Quiet Tip/Ring polarity reversal Supports meter pulse injection Spare op amp for meter pulse filtering – –72 V ...
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L7554 Low-Power SLIC Content Features .................................................................................................................................................................. 1 Description ............................................................................................................................................................... 1 Pin Information ......................................................................................................................................................... 4 Functional Description .............................................................................................................................................. 6 Absolute Maximum Ratings ..................................................................................................................................... 6 Recommended Operating Conditions ..................................................................................................................... 7 Electrical Characteristics ......................................................................................................................................... 7 Ring Trip Requirements ..................................................................................................................................... 11 Test Configurations ............................................................................................................................................... ...
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Data Sheet March 1997 Description (continued RESISTANCE DCR LOOP CLOSURE DETECTOR LCTH RTSP RING TRIP DETECTOR RTSN RING GROUND ICM DETECTOR Lucent Technologies Inc. POWER CONDITIONING & REFERENCE – –1 V/ ...
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L7554 Low-Power SLIC Pin Information V CC RCVP RCVN TXI LCTH V REG DCOUT V BAT PR Table 1. Pin Descriptions Pin Symbol Type Current-Limit Program Input. A resistor to DCOUT sets the dc current limit of ...
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Data Sheet March 1997 Pin Information (continued) Table 1. Pin Descriptions (continued) Pin Symbol Type 20 VITR O Transmit ac Output Voltage. This output is a voltage that is directly proportional to the differential ac Tip/Ring current ...
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L7554 Low-Power SLIC Functional Description Table 2. Input State Coding Powerup, Forward Battery. Normal talk and battery feed state. Pin PT is positive with respect to PR. On-hook transmission is enabled ...
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Data Sheet March 1997 Recommended Operating Conditions Parameter Ambient Temperature V Supply Voltage CC V Supply Voltage: BAT L7554AP L7554BP Loop Closure Threshold-detection Programming Range dc Loop Current-limit Programming Range On- and Off-hook 2-wire Signal Level ac Termination Impedance Programming ...
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L7554 Low-Power SLIC Electrical Characteristics Table 5. 2-Wire Port Parameter Tip or Ring Drive Current = dc + Longitudinal + Signal Currents Signal Current Longitudinal Current Capability per Wire 2 dc Loop Current Limit R = 100 LOOP Programmability Range ...
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Data Sheet March 1997 Electrical Characteristics Table 6. Analog Pin Characteristics Parameter Differential PT/PR Current Sense (DCOUT) Gain (PT/PR to DCOUT) Offset Voltage @ BAT LOOP Loop Closure Detector Threshold Programming Accuracy Ring Ground Detector Threshold ...
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L7554 Low-Power SLIC Electrical Characteristics Table 8. ac Feed Characteristics Parameter 1 ac Termination Impedance 2 Longitudinal Impedance Total Harmonic Distortion—200 kHz Off-hook On-hook Transmit Gain kHz (PT/PR to VITR) Transmit Accuracy in dB, ...
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Data Sheet March 1997 Electrical Characteristics Table 9. Logic Inputs and Outputs All outputs except RGDET are open-collector with internal pull-up resistor. RGDET is open-collector without inter- nal pull-up. Parameter Input Voltages Low Level (permissible range) High Level (permissible range) ...
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L7554 Low-Power SLIC Test Configurations R LOOP 68 BAT 100 4.7 µ BAT BASIC 900 V T/R TEST CIRCUIT – --------- - PSRR = 20 log ...
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Data Sheet March 1997 Test Configurations (continued) 100 µ 368 V M 368 – PR 100 µF LONGITUDINAL BALANCE = 20 log Figure 7. Longitudinal Balance 0.01 µF 82.5 1 600 50 6,7 2 LB1201 V ...
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L7554 Low-Power SLIC Applications R PROG 3 66 PROG 14 DCOUT R 12 LCTH LCTH 24 0.1 µ TIP L7581 250 V PROT RELAY RING ...
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Data Sheet March 1997 Applications (continued) Table 10. Parts List for Loop Start and Ground Start Applications Name Integrated Circuits SLIC L7554 Protector 250 V Thyristor type Ringing Relay L7581 Codec T7513 Overvoltage Protection Fusible PT R ...
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L7554 Low-Power SLIC Applications (continued) Design Considerations Table 11 shows the design parameters of the application circuit shown in Figure 11. Components that are adjusted to program these values are also shown. Table 11. 600 Design Parameters Design Parameter Loop ...
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Data Sheet March 1997 Applications (continued) Characteristic Curves 0 RECEIVE GAIN –10 –20 –30 –40 –50 100 1000 FREQUENCY (Hz) Figure 13. 7551 Receive Gain and Hybrid Balance vs. Frequency 0 TRANSMIT GAIN –10 –20 –30 RETURN LOSS –40 –50 ...
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L7554 Low-Power SLIC Applications (continued) Characteristic Curves (continued LOOP CLOSURE THRESHOLD RESISTOR, R Note –48 V. BAT Figure 17. Loop Closure Program Resistor Selection 2000 1500 1000 STILL ...
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Data Sheet March 1997 Applications (continued) Characteristic Curves (continued) 1500 1000 500 0 0 500 1000 LOOP RESISTANCE, R Note – mA 113 . BAT LIM DC1 Figure 21. 7551 Typical SLIC ...
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L7554 Low-Power SLIC Applications (continued) dc Applications Battery Feed The dc feed characteristic can be described by – ------------------------------------------- - Rdc + + L P ...
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Data Sheet March 1997 Applications (continued) dc Applications (continued T/R T/R AMP – – Figure 26. SLIC 2-Wire Output Stage In addition to the ...
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L7554 Low-Power SLIC Applications (continued) dc Applications (continued) Adjusting dc Feed Resistance The dc feed resistance may be adjusted with the help of Figure 28 30% DCR R3 DCOUT Figure 28. Equivalent Circuit for Adjusting the dc ...
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Data Sheet March 1997 Applications (continued) dc Applications (continued) Ring Trip Detection The ring trip circuit is a comparator that has a special in- put section optimized for this application. The equiva- lent circuit is shown in Figure 31, along ...
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L7554 Low-Power SLIC Applications (continued) ac Design There are four key ac design parameters. Termination impedance is the impedance looking into the 2-wire port of the line card set to match the impedance of the telephone loop in ...
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Data Sheet March 1997 Applications (continued) ac Design (continued) ac equivalent circuits using a T7513 Codec are shown in Figures 32 and T/R – R ...
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L7554 Low-Power SLIC Applications (continued) ac Design (continued) Example 1, Real Termination The following design equations refer to the circuit in Figure 32. Use these to synthesize real termination impedance. Termination Impedance --------- - ...
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Data Sheet March 1997 Outline Diagram 44-Pin PLCC Controlling dimensions are in millimeters. PIN #1 IDENTIFIER Lucent Technologies Inc. 17.65 MAX 16.66 MAX ZONE 0.51 MIN 1.27 TYP 0.53 TYP MAX ...
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... L7554 Low-Power SLIC Ordering Information Device Part No. ATTL7554AP Low-Power SLIC, –60 V ATTL7554AP–TR* Low-Power SLIC, –60 V ATTL7554BP Low-Power SLIC, –72 V ATTL7554BP–TR* Low-Power SLIC, –72 V *Devices on tape and reel must be ordered in 1000-piece increments. For additional information, contact your Microelectronics Group Account Manager or the following: INTERNET: http://www ...