HC5549CM Intersil Corporation, HC5549CM Datasheet
HC5549CM
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HC5549CM Summary of contents
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... SENSING PORT TEST DETECTOR CONTROL ACCESS LOGIC LOGIC RTD RD E0 DET ALM BSEL CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. | Intersil and Design is a trademark of Intersil Corporation. HC5549 File Number - Ambient Temp Range VRS VRX VTX -IN VFB F2 ...
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... Ordering Information (PLCC Package Only) BAT PART NUMBER 48V SW HC5549CM HC5549IM Device Operating Modes OPERATING MODE F2 Low Power Standby 0 Forward Active 0 Unused 0 Reverse Active 0 Ringing 1 Unused 1 Unused 1 Power Denial 1 Pinout 4-2 HC5549 RING 2W POL DELAY LOOP REV DRIVER BACK LB = 53dB F1 F0 ...
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Absolute Maximum Ratings T A Maximum Supply Voltages ...
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Electrical Specifications Unless Otherwise Specified, T current limit = 25mA. All AC Parameters are specified at 600 2-wire terminating impedance over the frequency band of 300Hz to 3.4kHz. Protection resistors = 0 . (Continued) PARAMETER DC PARAMETERS Loop Current Limit ...
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Electrical Specifications Unless Otherwise Specified, T current limit = 25mA. All AC Parameters are specified at 600 2-wire terminating impedance over the frequency band of 300Hz to 3.4kHz. Protection resistors = 0 . (Continued) PARAMETER ON HOOK POWER DISSIPATION Forward ...
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– 4-WIRE TO 2-WIRE GAIN The 4-wire to 2-wire gain is defined as the receive gain function of the terminating impedance, synthesized impedance and protection resistors. Equation 6 calculates the ...
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A switch and 600 resistor connect the MTU reference to the Ring terminal. When the high battery voltage exceeds the MTU reference of -49V (typically), the Ring terminal will be clamped by the internal reference. The same Ring ...
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DC Loop Feed The feedback mechanism for monitoring the DC portion of the loop current is the loop detector. A low pass filter is used in the feedback to block voice band signals from interfering with the loop current limit ...
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AC node voltages for a specific Tip and Ring load. Transhybrid Balance The final step in completing the impedance synthesis design is calculating the necessary gains for transhybrid balance. The AC feed back ...
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Tip and Ring DC voltages. time C = ---------------- POL 75000 Where time is the required reversal time. Polarized capacitors may be used for C . The low voltage at ...
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Switching between high and low battery will have no effect during power denial. Functionality During power denial, both the Tip and Ring amplifiers are disabled, representing high impedances. The voltages at ...
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Basic Application Circuit RP1 PROTECTION NETWORK RP2 -48V Basic Application Circuit Component List COMPONENT VALUE TOLERANCE U1 HC5549 RRT 20k RSH 49.9k RIL 71.5k RS 210k CRX, CRS, CTX, CRT, 0.47 F CPOL, CFB Design Parameters: Ring Trip Threshold = ...
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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 ...