U3761MB-T Datasheet, PDF (19/27 Pages) ATMEL Corporation – Universal Telephone IC - All Functions Integrated

Figure 13. Symbolic Timing Diagram: HFI, HFO Function
HFI
HFO
U3761MB-T
Figure 14. Symbolic Timing Diagram: On Hook Debounce Time
HKS
Off hook
On hook
XT
165 ms
Figure 15. HKS Threshold Voltage
60
55
50
switch on
45
40
35
switch off
30
2.0
2.5
3.0
3.5
4.0
4.5
5.0
V_DD (V)
19
4744A–CORD–09/03