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ATTL7554BP-TR Datasheet(PDF) 11 Page - Agere Systems |
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ATTL7554BP-TR Datasheet(HTML) 11 Page - Agere Systems |
11 / 28 page Data Sheet March 1997 Lucent Technologies Inc. 11 L7554 Low-Power SLIC Electrical Characteristics (continued) 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 Symbol Min Typ Max Unit Input Voltages Low Level (permissible range) High Level (permissible range) VIL VIH –0.5 2.0 0.4 2.4 0.7 VCC V V Input Currents Low Level (VCC = 5.25 V, VI = 0.4 V) High Level (VCC = 5.25 V, VI = 2.4 V) IIL IIH — — –115 –60 –200 –100 µA µA Output Voltages (open-collector with internal pull-up resistor) Low Level (VCC = 4.75 V, IOL = 360 µA) High Level (VCC = 4.75 V, IOH = –20 µA) VOL VOH 0 2.4 0.2 — 0.4 VCC V V Ring Trip Requirements s Ringing signal: — Voltage, minimum 35 Vrms, maximum 100 Vrms. — Frequency, 17 Hz to 23 Hz. — Crest factor, 1.4 to 2. s Ringing trip: — ≤100 ms (typical), ≤250 ms (VBAT = –33 V, loop length = 530 Ω). s Pretrip: — The circuits in Figure 3 will not cause ringing trip. 12-2572 (C) Figure 3. Ring Trip Circuits RING RING RING 100 Ω 10 k Ω 6 µF TIP TIP TIP 2 µF 200 Ω SWITCH CLOSES < 12 ms |
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