hc5549 Intersil Corporation, hc5549 Datasheet
hc5549
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hc5549 Summary of contents
Page 1
... The high battery supply can be used in the on-hook condition to allow interfacing to fax and answering machines that require 48V to detect end of call status. The HC5549 also has a low power standby state with very low power consumption (35mW) resulting in exceptionally low battery drain while providing continued loop supervision ...
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... SHD GKD 0 1 SHD GKD SHD GKD 0 0 RTD RTD n/a HC5549 (PLCC) TOP VIEW SW SWC TEMP. RANGE °C PACKAGE ...
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... Insertion Loss 2-Wire to 4-Wire Level Linearity 4-Wire to 2-Wire Level Linearity Referenced to -10dBm Idle Channel Noise 2-Wire 3 HC5549 Thermal Information = 25°C Thermal Resistance (Typical, Note 1) PLCC Package Maximum Junction Temperature Plastic . . . . . . . . . . . . . . . . 150°C Maximum Storage Temperature Range . . . . . . . . . -65°C to 150°C Maximum Lead Temperature (Soldering 10s 300° ...
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... SUPPLY CURRENTS (Supply currents not listed are considered negligible and do not contribute significantly to total power dissipation. All measurements made under open circuit load conditions.) Low Power Standby Forward or Reverse (Note 5) Forward Power Denial Forward Lookback 4 HC5549 = -40°C to 85° -24V -48V TEST CONDITIONS ...
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... RT RT current and the peak off hook current while still ringing. ⁄ 1800 The capacitor parallel with response time. 5 HC5549 = -40°C to 85° TEST CONDITIONS BSEL = 0 BSEL = 1 BSEL = 1 BSEL = 300Hz f = 1kHz f = 3.4kHz f = 300Hz f = 1kHz f = 3.4kHz 300Hz ≤ f ≤ 3.4kHz 300Hz ≤ ...
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... C 400 HC5549 Low Power Standby Overview The low power standby mode (LPS, 000) should be used during idle line conditions. The device is designed to operate from the high battery during this mode. Most of the internal circuitry is powered down, resulting in low power dissipation. ...
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... SLC Most applications do not specify charging current requirements during standby. When specified, the typical charging current may be as high as 5mA. 7 HC5549 Forward Active Overview The forward active mode (FA, 001) is the primary AC transmission mode of the device. On hook transmission, DC loop feed and voice transmission are supported during forward (EQ ...
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... LOOP LIM -------------------------------------------------------------- A LIM 10e3 8 HC5549 The maximum loop impedance for a programmed loop current is defined KNEE When R . The value of the DC constant current feed to constant voltage, resistive feed. The line segment I load characteristic Voice Transmission The feedback mechanism for monitoring the AC portion of the loop current consists of two amplifiers, the sense m = (∆ ...
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... LOOP 9 HC5549 If the loop length is greater than R in the constant voltage, resistive feed region. The power dissipated in this region is calculated using Equation 29. output Since the current relationships are different for constant current versus constant voltage, the region of device operation is critical to valid power dissipation calculations ...
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... Three very distinct actions occur when the devices detects a ring trip. First, the DET output is latched low. The latching 10 HC5549 mechanism eliminates the need for software filtering of the detector output. The latch is cleared when the operating mode is changed externally. Second, the VRS input is (EQ ...
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... If standby requirements do not require high battery operation, then a lower battery will result in lower standby power. 11 HC5549 Uncommitted Switch Overview The uncommitted switch is a three terminal device designed for flexibility. The independent logic control input, SWC, allows switch operation regardless of device operating mode ...
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... SW- CRT VFB RTD RRT SWC RSH RD BSEL E0 RIL ILIM F0 F1 CDC VCC CDC F2 CPOL DET POL ALM CIL AGND BGND FIGURE 11. HC5549 BASIC APPLICATION CIRCUIT RATING COMPONENT N/A N/A n/a 1% 0.1W CDC 1% 0.1W CPS1 1% 0.1W CPS2, CPS3 1% 0.1W D1 20% 10V RP1, RP2 CRX RB1 RB2 CTX CFB ...
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... However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 13 HC5549 DESCRIPTION FN4539.3 ...