(China (Mainland))
Product Summary
The L7554AP electronic subscriber loop interface circuit (SLIC) is optimized for low-power consumption while providing an extensive set of features. Quiet polarity reversal is possible because the ac path is uninterrupted during transition. The L7554AP includes the ground start state and a summing node for meter pulse injection to 2.2 Vrms. A spare, uncommitted op amp is included for meter pulse filtering. The L7554AP is being offered in two versions, based upon maximum battery. The L7554AP is guaranteed to –60V. The L7554AP is available in a 44-pin PLCC package. It is built by using a 90 V complementary bipolar (CBIC) process.
Parametrics
L7554AP absolute maximum ratings: (1)5V Power Supply, VCC: 7.0V; (2)Battery (Talking) Supply, VBAT: 75V; (3)Logic Input Voltage: –0.5 to +7.0V; (4)Analog Input Voltage: –7.0 to +7.0V; (5)Maximum Junction Temperature, TJ: 165℃; (6)Storage Temperature Range, Tstg: –40 to +125℃; (7)Relative Humidity Range, RH: 5 to 95%; (8)Ground Potential Difference (BGND to AGND): ±3V; (9)Current into Ring Trip Inputs, IRTSP, IRTSN: ±240mA.
Features
L7554AP features: (1)Low active power (typical 165 mW during on-hook transmission); (2)Sleep state for low idle power (76 mW); (3)Quiet Tip/Ring polarity reversal; (4)Supports meter pulse injection; (5)Spare op amp for meter pulse filtering; (6)–24 V to –72 V power supply operation; (7)Distortion-free on-hook transmission.
Diagrams
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L7557 |
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L7554 |
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