L7581 Datasheet, PDF (11/16 Pages) Agere Systems – Ringing Access Switch

Data Sheet
November 1999
L7581 Ringing Access Switch
Typical Performance Characteristics
dc CURRENT-LIMIT
BREAK SWITCHES
VBAT – 2
VBAT – 4
VBAT
VON
<1 µA
3V
50 mA
dc CURRENT LIMIT
(OF BREAK SWITCHES)
IH
12-2309.f (F)
Figure 3. Protection Circuit A Version
+I
ILIMIT
CURRENT
LIMITING
2/3 RON
–1.5 V
–V
RON
RON
1.5 V
+V
2/3 RON
CURRENT
LIMITING
ILIMIT
–I
Figure 5. Switches 1—3
12-2311 (F)
+I
RON
dc CURRENT-LIMIT
BREAK SWITCHES
VBAT – 3
VBAT
<1 µA
3V
–VOS
–V
+VOS
+V
dc CURRENT LIMIT
(OF BREAK SWITCHES)
12-2309.b (F)
Figure 4. Protection Circuit B Version
–I
Figure 6. Switch 4
12-2312 (F)
Lucent Technologies Inc.
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